bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1 | /* |
ths | 223d467 | 2007-12-15 17:28:36 +0000 | [diff] [blame] | 2 | * Block driver for RAW files (posix) |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 4 | * Copyright (c) 2006 Fabrice Bellard |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 5 | * |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 24 | |
Peter Maydell | 80c71a2 | 2016-01-18 18:01:42 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Markus Armbruster | a8d2532 | 2019-05-23 16:35:08 +0200 | [diff] [blame] | 26 | #include "qemu-common.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 27 | #include "qapi/error.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 28 | #include "qemu/cutils.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 29 | #include "qemu/error-report.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 30 | #include "block/block_int.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 31 | #include "qemu/module.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 32 | #include "qemu/option.h" |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 33 | #include "trace.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 34 | #include "block/thread-pool.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 35 | #include "qemu/iov.h" |
Paolo Bonzini | 0187f5c | 2016-07-04 18:33:20 +0200 | [diff] [blame] | 36 | #include "block/raw-aio.h" |
Markus Armbruster | 452fcdb | 2018-02-01 12:18:39 +0100 | [diff] [blame] | 37 | #include "qapi/qmp/qdict.h" |
Markus Armbruster | d49b683 | 2015-03-17 18:29:20 +0100 | [diff] [blame] | 38 | #include "qapi/qmp/qstring.h" |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 39 | |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 40 | #include "scsi/pr-manager.h" |
| 41 | #include "scsi/constants.h" |
| 42 | |
Pavel Borzenkov | 83affaa | 2011-11-10 22:40:06 +0400 | [diff] [blame] | 43 | #if defined(__APPLE__) && (__MACH__) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 44 | #include <paths.h> |
| 45 | #include <sys/param.h> |
| 46 | #include <IOKit/IOKitLib.h> |
| 47 | #include <IOKit/IOBSD.h> |
| 48 | #include <IOKit/storage/IOMediaBSDClient.h> |
| 49 | #include <IOKit/storage/IOMedia.h> |
| 50 | #include <IOKit/storage/IOCDMedia.h> |
| 51 | //#include <IOKit/storage/IOCDTypes.h> |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 52 | #include <IOKit/storage/IODVDMedia.h> |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 53 | #include <CoreFoundation/CoreFoundation.h> |
| 54 | #endif |
| 55 | |
| 56 | #ifdef __sun__ |
ths | 2e9671d | 2007-01-05 17:44:41 +0000 | [diff] [blame] | 57 | #define _POSIX_PTHREAD_SEMANTICS 1 |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 58 | #include <sys/dkio.h> |
| 59 | #endif |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 60 | #ifdef __linux__ |
| 61 | #include <sys/ioctl.h> |
Bernhard Kohl | 05acda4 | 2010-09-06 17:06:02 +0200 | [diff] [blame] | 62 | #include <sys/param.h> |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 63 | #include <sys/syscall.h> |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 64 | #include <linux/cdrom.h> |
| 65 | #include <linux/fd.h> |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 66 | #include <linux/fs.h> |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 67 | #include <linux/hdreg.h> |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 68 | #include <scsi/sg.h> |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 69 | #ifdef __s390__ |
| 70 | #include <asm/dasd.h> |
| 71 | #endif |
Chunyan Liu | 4ab1559 | 2014-06-30 14:29:58 +0800 | [diff] [blame] | 72 | #ifndef FS_NOCOW_FL |
| 73 | #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ |
| 74 | #endif |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 75 | #endif |
Denis V. Lunev | b953f07 | 2015-01-30 11:42:14 +0300 | [diff] [blame] | 76 | #if defined(CONFIG_FALLOCATE_PUNCH_HOLE) || defined(CONFIG_FALLOCATE_ZERO_RANGE) |
Kusanagi Kouichi | 3d4fa43 | 2013-01-14 16:26:52 +0100 | [diff] [blame] | 77 | #include <linux/falloc.h> |
| 78 | #endif |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 79 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
ths | 1cb6c3f | 2006-12-21 19:14:11 +0000 | [diff] [blame] | 80 | #include <sys/disk.h> |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 81 | #include <sys/cdio.h> |
ths | 1cb6c3f | 2006-12-21 19:14:11 +0000 | [diff] [blame] | 82 | #endif |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 83 | |
blueswir1 | 128ab2f | 2008-08-15 18:33:42 +0000 | [diff] [blame] | 84 | #ifdef __OpenBSD__ |
| 85 | #include <sys/ioctl.h> |
| 86 | #include <sys/disklabel.h> |
| 87 | #include <sys/dkio.h> |
| 88 | #endif |
| 89 | |
Christoph Egger | d1f6fd8 | 2011-05-23 14:31:17 +0200 | [diff] [blame] | 90 | #ifdef __NetBSD__ |
| 91 | #include <sys/ioctl.h> |
| 92 | #include <sys/disklabel.h> |
| 93 | #include <sys/dkio.h> |
| 94 | #include <sys/disk.h> |
| 95 | #endif |
| 96 | |
blueswir1 | c5e9723 | 2009-03-07 20:06:23 +0000 | [diff] [blame] | 97 | #ifdef __DragonFly__ |
| 98 | #include <sys/ioctl.h> |
| 99 | #include <sys/diskslice.h> |
| 100 | #endif |
| 101 | |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 102 | #ifdef CONFIG_XFS |
| 103 | #include <xfs/xfs.h> |
| 104 | #endif |
| 105 | |
Laurent Vivier | 4f7d28d | 2018-12-13 17:27:26 +0100 | [diff] [blame] | 106 | #include "trace.h" |
ths | 8c05dbf | 2007-09-13 12:29:23 +0000 | [diff] [blame] | 107 | |
aliguori | f646557 | 2008-10-14 18:00:38 +0000 | [diff] [blame] | 108 | /* OS X does not have O_DSYNC */ |
| 109 | #ifndef O_DSYNC |
G 3 | 1c27a8b | 2009-07-01 13:28:32 -0400 | [diff] [blame] | 110 | #ifdef O_SYNC |
aliguori | 7ab064d | 2008-10-14 18:14:47 +0000 | [diff] [blame] | 111 | #define O_DSYNC O_SYNC |
G 3 | 1c27a8b | 2009-07-01 13:28:32 -0400 | [diff] [blame] | 112 | #elif defined(O_FSYNC) |
| 113 | #define O_DSYNC O_FSYNC |
| 114 | #endif |
aliguori | f646557 | 2008-10-14 18:00:38 +0000 | [diff] [blame] | 115 | #endif |
| 116 | |
aliguori | 9f7965c | 2008-10-14 14:42:54 +0000 | [diff] [blame] | 117 | /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
| 118 | #ifndef O_DIRECT |
| 119 | #define O_DIRECT O_DSYNC |
| 120 | #endif |
| 121 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 122 | #define FTYPE_FILE 0 |
| 123 | #define FTYPE_CD 1 |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 124 | |
Christoph Hellwig | 581b9e2 | 2010-09-12 23:43:21 +0200 | [diff] [blame] | 125 | #define MAX_BLOCKSIZE 4096 |
| 126 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 127 | /* Posix file locking bytes. Libvirt takes byte 0, we start from higher bytes, |
| 128 | * leaving a few more bytes for its future use. */ |
| 129 | #define RAW_LOCK_PERM_BASE 100 |
| 130 | #define RAW_LOCK_SHARED_BASE 200 |
| 131 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 132 | typedef struct BDRVRawState { |
| 133 | int fd; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 134 | bool use_lock; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 135 | int type; |
Christoph Hellwig | 0e1d8f4 | 2009-06-15 13:53:26 +0200 | [diff] [blame] | 136 | int open_flags; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 137 | size_t buf_align; |
| 138 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 139 | /* The current permissions. */ |
| 140 | uint64_t perm; |
| 141 | uint64_t shared_perm; |
| 142 | |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 143 | /* The perms bits whose corresponding bytes are already locked in |
Fam Zheng | f2e3af2 | 2018-10-11 15:21:34 +0800 | [diff] [blame] | 144 | * s->fd. */ |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 145 | uint64_t locked_perm; |
| 146 | uint64_t locked_shared_perm; |
| 147 | |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 148 | int perm_change_fd; |
Max Reitz | 094e363 | 2019-05-22 19:03:45 +0200 | [diff] [blame] | 149 | int perm_change_flags; |
Kevin Wolf | e0c9cf3 | 2019-03-07 19:07:35 +0100 | [diff] [blame] | 150 | BDRVReopenState *reopen_state; |
| 151 | |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 152 | #ifdef CONFIG_XFS |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 153 | bool is_xfs:1; |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 154 | #endif |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 155 | bool has_discard:1; |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 156 | bool has_write_zeroes:1; |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 157 | bool discard_zeroes:1; |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 158 | bool use_linux_aio:1; |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 159 | bool use_linux_io_uring:1; |
Kevin Wolf | e5bcf96 | 2017-03-22 22:00:05 +0100 | [diff] [blame] | 160 | bool page_cache_inconsistent:1; |
Denis V. Lunev | d50d822 | 2015-01-30 11:42:15 +0300 | [diff] [blame] | 161 | bool has_fallocate; |
Roger Pau Monne | 3cad830 | 2014-10-21 16:03:03 +0200 | [diff] [blame] | 162 | bool needs_alignment; |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 163 | bool drop_cache; |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 164 | bool check_cache_dropped; |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 165 | struct { |
| 166 | uint64_t discard_nb_ok; |
| 167 | uint64_t discard_nb_failed; |
| 168 | uint64_t discard_bytes_ok; |
| 169 | } stats; |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 170 | |
| 171 | PRManager *pr_mgr; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 172 | } BDRVRawState; |
| 173 | |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 174 | typedef struct BDRVRawReopenState { |
| 175 | int fd; |
| 176 | int open_flags; |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 177 | bool drop_cache; |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 178 | bool check_cache_dropped; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 179 | } BDRVRawReopenState; |
| 180 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 181 | static int fd_open(BlockDriverState *bs); |
Kevin Wolf | 22afa7b | 2009-06-26 19:51:24 +0200 | [diff] [blame] | 182 | static int64_t raw_getlength(BlockDriverState *bs); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 183 | |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 184 | typedef struct RawPosixAIOData { |
| 185 | BlockDriverState *bs; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 186 | int aio_type; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 187 | int aio_fildes; |
| 188 | |
| 189 | off_t aio_offset; |
| 190 | uint64_t aio_nbytes; |
| 191 | |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 192 | union { |
| 193 | struct { |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 194 | struct iovec *iov; |
| 195 | int niov; |
| 196 | } io; |
| 197 | struct { |
| 198 | uint64_t cmd; |
| 199 | void *buf; |
| 200 | } ioctl; |
| 201 | struct { |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 202 | int aio_fd2; |
| 203 | off_t aio_offset2; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 204 | } copy_range; |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 205 | struct { |
| 206 | PreallocMode prealloc; |
| 207 | Error **errp; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 208 | } truncate; |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 209 | }; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 210 | } RawPosixAIOData; |
| 211 | |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 212 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 213 | static int cdrom_reopen(BlockDriverState *bs); |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 214 | #endif |
| 215 | |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 216 | #if defined(__NetBSD__) |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 217 | static int raw_normalize_devicepath(const char **filename, Error **errp) |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 218 | { |
| 219 | static char namebuf[PATH_MAX]; |
| 220 | const char *dp, *fname; |
| 221 | struct stat sb; |
| 222 | |
| 223 | fname = *filename; |
| 224 | dp = strrchr(fname, '/'); |
| 225 | if (lstat(fname, &sb) < 0) { |
Paolo Bonzini | f6fc1e3 | 2019-07-25 11:59:20 +0200 | [diff] [blame] | 226 | error_setg_file_open(errp, errno, fname); |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 227 | return -errno; |
| 228 | } |
| 229 | |
| 230 | if (!S_ISBLK(sb.st_mode)) { |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | if (dp == NULL) { |
| 235 | snprintf(namebuf, PATH_MAX, "r%s", fname); |
| 236 | } else { |
| 237 | snprintf(namebuf, PATH_MAX, "%.*s/r%s", |
| 238 | (int)(dp - fname), fname, dp + 1); |
| 239 | } |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 240 | *filename = namebuf; |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 241 | warn_report("%s is a block device, using %s", fname, *filename); |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | #else |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 246 | static int raw_normalize_devicepath(const char **filename, Error **errp) |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 247 | { |
| 248 | return 0; |
| 249 | } |
| 250 | #endif |
| 251 | |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 252 | /* |
| 253 | * Get logical block size via ioctl. On success store it in @sector_size_p. |
| 254 | */ |
| 255 | static int probe_logical_blocksize(int fd, unsigned int *sector_size_p) |
| 256 | { |
| 257 | unsigned int sector_size; |
| 258 | bool success = false; |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 259 | int i; |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 260 | |
| 261 | errno = ENOTSUP; |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 262 | static const unsigned long ioctl_list[] = { |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 263 | #ifdef BLKSSZGET |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 264 | BLKSSZGET, |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 265 | #endif |
| 266 | #ifdef DKIOCGETBLOCKSIZE |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 267 | DKIOCGETBLOCKSIZE, |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 268 | #endif |
| 269 | #ifdef DIOCGSECTORSIZE |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 270 | DIOCGSECTORSIZE, |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 271 | #endif |
Peter Maydell | 700f9ce | 2017-03-23 14:36:28 +0000 | [diff] [blame] | 272 | }; |
| 273 | |
| 274 | /* Try a few ioctls to get the right size */ |
| 275 | for (i = 0; i < (int)ARRAY_SIZE(ioctl_list); i++) { |
| 276 | if (ioctl(fd, ioctl_list[i], §or_size) >= 0) { |
| 277 | *sector_size_p = sector_size; |
| 278 | success = true; |
| 279 | } |
| 280 | } |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 281 | |
| 282 | return success ? 0 : -errno; |
| 283 | } |
| 284 | |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 285 | /** |
| 286 | * Get physical block size of @fd. |
| 287 | * On success, store it in @blk_size and return 0. |
| 288 | * On failure, return -errno. |
| 289 | */ |
| 290 | static int probe_physical_blocksize(int fd, unsigned int *blk_size) |
| 291 | { |
| 292 | #ifdef BLKPBSZGET |
| 293 | if (ioctl(fd, BLKPBSZGET, blk_size) < 0) { |
| 294 | return -errno; |
| 295 | } |
| 296 | return 0; |
| 297 | #else |
| 298 | return -ENOTSUP; |
| 299 | #endif |
| 300 | } |
| 301 | |
Stefan Hajnoczi | 22d182e | 2015-03-05 15:38:17 -0600 | [diff] [blame] | 302 | /* Check if read is allowed with given memory buffer and length. |
| 303 | * |
| 304 | * This function is used to check O_DIRECT memory buffer and request alignment. |
| 305 | */ |
| 306 | static bool raw_is_io_aligned(int fd, void *buf, size_t len) |
| 307 | { |
| 308 | ssize_t ret = pread(fd, buf, len, 0); |
| 309 | |
| 310 | if (ret >= 0) { |
| 311 | return true; |
| 312 | } |
| 313 | |
| 314 | #ifdef __linux__ |
| 315 | /* The Linux kernel returns EINVAL for misaligned O_DIRECT reads. Ignore |
| 316 | * other errors (e.g. real I/O error), which could happen on a failed |
| 317 | * drive, since we only care about probing alignment. |
| 318 | */ |
| 319 | if (errno != EINVAL) { |
| 320 | return true; |
| 321 | } |
| 322 | #endif |
| 323 | |
| 324 | return false; |
| 325 | } |
| 326 | |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 327 | static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 328 | { |
| 329 | BDRVRawState *s = bs->opaque; |
| 330 | char *buf; |
Wei Yang | 038adc2 | 2019-10-13 10:11:45 +0800 | [diff] [blame] | 331 | size_t max_align = MAX(MAX_BLOCKSIZE, qemu_real_host_page_size); |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 332 | size_t alignments[] = {1, 512, 1024, 2048, 4096}; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 333 | |
Dimitris Aragiorgis | b192af8 | 2015-06-23 13:44:56 +0300 | [diff] [blame] | 334 | /* For SCSI generic devices the alignment is not really used. |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 335 | With buffered I/O, we don't have any restrictions. */ |
Dimitris Aragiorgis | b192af8 | 2015-06-23 13:44:56 +0300 | [diff] [blame] | 336 | if (bdrv_is_sg(bs) || !s->needs_alignment) { |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 337 | bs->bl.request_alignment = 1; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 338 | s->buf_align = 1; |
| 339 | return; |
| 340 | } |
| 341 | |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 342 | bs->bl.request_alignment = 0; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 343 | s->buf_align = 0; |
Ekaterina Tumanova | 8a4ed0d | 2015-02-16 12:47:55 +0100 | [diff] [blame] | 344 | /* Let's try to use the logical blocksize for the alignment. */ |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 345 | if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) { |
| 346 | bs->bl.request_alignment = 0; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 347 | } |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 348 | #ifdef CONFIG_XFS |
| 349 | if (s->is_xfs) { |
| 350 | struct dioattr da; |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 351 | if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) { |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 352 | bs->bl.request_alignment = da.d_miniosz; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 353 | /* The kernel returns wrong information for d_mem */ |
| 354 | /* s->buf_align = da.d_mem; */ |
| 355 | } |
| 356 | } |
| 357 | #endif |
| 358 | |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 359 | /* |
| 360 | * If we could not get the sizes so far, we can only guess them. First try |
| 361 | * to detect request alignment, since it is more likely to succeed. Then |
| 362 | * try to detect buf_align, which cannot be detected in some cases (e.g. |
| 363 | * Gluster). If buf_align cannot be detected, we fallback to the value of |
| 364 | * request_alignment. |
| 365 | */ |
| 366 | |
| 367 | if (!bs->bl.request_alignment) { |
| 368 | int i; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 369 | size_t align; |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 370 | buf = qemu_memalign(max_align, max_align); |
| 371 | for (i = 0; i < ARRAY_SIZE(alignments); i++) { |
| 372 | align = alignments[i]; |
| 373 | if (raw_is_io_aligned(fd, buf, align)) { |
| 374 | /* Fallback to safe value. */ |
| 375 | bs->bl.request_alignment = (align != 1) ? align : max_align; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 376 | break; |
| 377 | } |
| 378 | } |
| 379 | qemu_vfree(buf); |
| 380 | } |
| 381 | |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 382 | if (!s->buf_align) { |
| 383 | int i; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 384 | size_t align; |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 385 | buf = qemu_memalign(max_align, 2 * max_align); |
| 386 | for (i = 0; i < ARRAY_SIZE(alignments); i++) { |
| 387 | align = alignments[i]; |
| 388 | if (raw_is_io_aligned(fd, buf + align, max_align)) { |
Stefan Hajnoczi | 236094c | 2019-08-27 11:13:28 +0100 | [diff] [blame] | 389 | /* Fallback to request_alignment. */ |
Nir Soffer | a6b257a | 2019-08-13 21:21:03 +0300 | [diff] [blame] | 390 | s->buf_align = (align != 1) ? align : bs->bl.request_alignment; |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 391 | break; |
| 392 | } |
| 393 | } |
| 394 | qemu_vfree(buf); |
| 395 | } |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 396 | |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 397 | if (!s->buf_align || !bs->bl.request_alignment) { |
Eric Blake | 8cc9c6e | 2016-06-23 16:37:25 -0600 | [diff] [blame] | 398 | error_setg(errp, "Could not find working O_DIRECT alignment"); |
| 399 | error_append_hint(errp, "Try cache.direct=off\n"); |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 400 | } |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 401 | } |
| 402 | |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 403 | static void raw_parse_flags(int bdrv_flags, int *open_flags, bool has_writers) |
Jeff Cody | 6a8dc04 | 2012-09-20 15:13:21 -0400 | [diff] [blame] | 404 | { |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 405 | bool read_write = false; |
Jeff Cody | 6a8dc04 | 2012-09-20 15:13:21 -0400 | [diff] [blame] | 406 | assert(open_flags != NULL); |
| 407 | |
| 408 | *open_flags |= O_BINARY; |
| 409 | *open_flags &= ~O_ACCMODE; |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 410 | |
| 411 | if (bdrv_flags & BDRV_O_AUTO_RDONLY) { |
| 412 | read_write = has_writers; |
| 413 | } else if (bdrv_flags & BDRV_O_RDWR) { |
| 414 | read_write = true; |
| 415 | } |
| 416 | |
| 417 | if (read_write) { |
Jeff Cody | 6a8dc04 | 2012-09-20 15:13:21 -0400 | [diff] [blame] | 418 | *open_flags |= O_RDWR; |
| 419 | } else { |
| 420 | *open_flags |= O_RDONLY; |
| 421 | } |
| 422 | |
| 423 | /* Use O_DSYNC for write-through caching, no flags for write-back caching, |
| 424 | * and O_DIRECT for no caching. */ |
| 425 | if ((bdrv_flags & BDRV_O_NOCACHE)) { |
| 426 | *open_flags |= O_DIRECT; |
| 427 | } |
Jeff Cody | 6a8dc04 | 2012-09-20 15:13:21 -0400 | [diff] [blame] | 428 | } |
| 429 | |
Max Reitz | 078896a | 2014-03-05 22:41:37 +0100 | [diff] [blame] | 430 | static void raw_parse_filename(const char *filename, QDict *options, |
| 431 | Error **errp) |
| 432 | { |
Max Reitz | 03c320d | 2017-05-22 21:52:16 +0200 | [diff] [blame] | 433 | bdrv_parse_filename_strip_prefix(filename, "file:", options); |
Max Reitz | 078896a | 2014-03-05 22:41:37 +0100 | [diff] [blame] | 434 | } |
| 435 | |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 436 | static QemuOptsList raw_runtime_opts = { |
| 437 | .name = "raw", |
| 438 | .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head), |
| 439 | .desc = { |
| 440 | { |
| 441 | .name = "filename", |
| 442 | .type = QEMU_OPT_STRING, |
| 443 | .help = "File name of the image", |
| 444 | }, |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 445 | { |
| 446 | .name = "aio", |
| 447 | .type = QEMU_OPT_STRING, |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 448 | .help = "host AIO implementation (threads, native, io_uring)", |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 449 | }, |
Fam Zheng | 16b48d5 | 2017-05-03 00:35:50 +0800 | [diff] [blame] | 450 | { |
| 451 | .name = "locking", |
| 452 | .type = QEMU_OPT_STRING, |
| 453 | .help = "file locking mode (on/off/auto, default: auto)", |
| 454 | }, |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 455 | { |
| 456 | .name = "pr-manager", |
| 457 | .type = QEMU_OPT_STRING, |
| 458 | .help = "id of persistent reservation manager object (default: none)", |
| 459 | }, |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 460 | #if defined(__linux__) |
| 461 | { |
| 462 | .name = "drop-cache", |
| 463 | .type = QEMU_OPT_BOOL, |
| 464 | .help = "invalidate page cache during live migration (default: on)", |
| 465 | }, |
| 466 | #endif |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 467 | { |
| 468 | .name = "x-check-cache-dropped", |
| 469 | .type = QEMU_OPT_BOOL, |
| 470 | .help = "check that page cache was dropped on live migration (default: off)" |
| 471 | }, |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 472 | { /* end of list */ } |
| 473 | }, |
| 474 | }; |
| 475 | |
Alberto Garcia | 8a2ce0b | 2019-03-12 18:48:48 +0200 | [diff] [blame] | 476 | static const char *const mutable_opts[] = { "x-check-cache-dropped", NULL }; |
| 477 | |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 478 | static int raw_open_common(BlockDriverState *bs, QDict *options, |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 479 | int bdrv_flags, int open_flags, |
| 480 | bool device, Error **errp) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 481 | { |
| 482 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 483 | QemuOpts *opts; |
| 484 | Error *local_err = NULL; |
Kevin Wolf | 8bfea15 | 2014-04-11 19:16:36 +0200 | [diff] [blame] | 485 | const char *filename = NULL; |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 486 | const char *str; |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 487 | BlockdevAioOptions aio, aio_default; |
Christoph Hellwig | 0e1d8f4 | 2009-06-15 13:53:26 +0200 | [diff] [blame] | 488 | int fd, ret; |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 489 | struct stat st; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 490 | OnOffAuto locking; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 491 | |
Peter Crosthwaite | 87ea75d | 2014-01-01 18:49:17 -0800 | [diff] [blame] | 492 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 493 | qemu_opts_absorb_qdict(opts, options, &local_err); |
Markus Armbruster | 84d18f0 | 2014-01-30 15:07:28 +0100 | [diff] [blame] | 494 | if (local_err) { |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 495 | error_propagate(errp, local_err); |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 496 | ret = -EINVAL; |
| 497 | goto fail; |
| 498 | } |
| 499 | |
| 500 | filename = qemu_opt_get(opts, "filename"); |
| 501 | |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 502 | ret = raw_normalize_devicepath(&filename, errp); |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 503 | if (ret != 0) { |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 504 | goto fail; |
Christoph Egger | 1de1ae0 | 2011-05-24 11:30:29 +0200 | [diff] [blame] | 505 | } |
| 506 | |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 507 | if (bdrv_flags & BDRV_O_NATIVE_AIO) { |
| 508 | aio_default = BLOCKDEV_AIO_OPTIONS_NATIVE; |
| 509 | #ifdef CONFIG_LINUX_IO_URING |
| 510 | } else if (bdrv_flags & BDRV_O_IO_URING) { |
| 511 | aio_default = BLOCKDEV_AIO_OPTIONS_IO_URING; |
| 512 | #endif |
| 513 | } else { |
| 514 | aio_default = BLOCKDEV_AIO_OPTIONS_THREADS; |
| 515 | } |
| 516 | |
Marc-AndrƩ Lureau | f7abe0e | 2017-08-24 10:46:10 +0200 | [diff] [blame] | 517 | aio = qapi_enum_parse(&BlockdevAioOptions_lookup, |
| 518 | qemu_opt_get(opts, "aio"), |
Markus Armbruster | 06c60b6 | 2017-08-24 10:45:57 +0200 | [diff] [blame] | 519 | aio_default, &local_err); |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 520 | if (local_err) { |
| 521 | error_propagate(errp, local_err); |
| 522 | ret = -EINVAL; |
| 523 | goto fail; |
| 524 | } |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 525 | |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 526 | s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE); |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 527 | #ifdef CONFIG_LINUX_IO_URING |
| 528 | s->use_linux_io_uring = (aio == BLOCKDEV_AIO_OPTIONS_IO_URING); |
| 529 | #endif |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 530 | |
Marc-AndrƩ Lureau | f7abe0e | 2017-08-24 10:46:10 +0200 | [diff] [blame] | 531 | locking = qapi_enum_parse(&OnOffAuto_lookup, |
| 532 | qemu_opt_get(opts, "locking"), |
Markus Armbruster | 06c60b6 | 2017-08-24 10:45:57 +0200 | [diff] [blame] | 533 | ON_OFF_AUTO_AUTO, &local_err); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 534 | if (local_err) { |
| 535 | error_propagate(errp, local_err); |
| 536 | ret = -EINVAL; |
| 537 | goto fail; |
| 538 | } |
| 539 | switch (locking) { |
| 540 | case ON_OFF_AUTO_ON: |
| 541 | s->use_lock = true; |
Fam Zheng | 2b218f5 | 2017-08-11 19:44:47 +0800 | [diff] [blame] | 542 | if (!qemu_has_ofd_lock()) { |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 543 | warn_report("File lock requested but OFD locking syscall is " |
| 544 | "unavailable, falling back to POSIX file locks"); |
| 545 | error_printf("Due to the implementation, locks can be lost " |
| 546 | "unexpectedly.\n"); |
Fam Zheng | 2b218f5 | 2017-08-11 19:44:47 +0800 | [diff] [blame] | 547 | } |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 548 | break; |
| 549 | case ON_OFF_AUTO_OFF: |
| 550 | s->use_lock = false; |
| 551 | break; |
| 552 | case ON_OFF_AUTO_AUTO: |
Fam Zheng | 2b218f5 | 2017-08-11 19:44:47 +0800 | [diff] [blame] | 553 | s->use_lock = qemu_has_ofd_lock(); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 554 | break; |
| 555 | default: |
| 556 | abort(); |
| 557 | } |
| 558 | |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 559 | str = qemu_opt_get(opts, "pr-manager"); |
| 560 | if (str) { |
| 561 | s->pr_mgr = pr_manager_lookup(str, &local_err); |
| 562 | if (local_err) { |
| 563 | error_propagate(errp, local_err); |
| 564 | ret = -EINVAL; |
| 565 | goto fail; |
| 566 | } |
| 567 | } |
| 568 | |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 569 | s->drop_cache = qemu_opt_get_bool(opts, "drop-cache", true); |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 570 | s->check_cache_dropped = qemu_opt_get_bool(opts, "x-check-cache-dropped", |
| 571 | false); |
| 572 | |
Jeff Cody | 6a8dc04 | 2012-09-20 15:13:21 -0400 | [diff] [blame] | 573 | s->open_flags = open_flags; |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 574 | raw_parse_flags(bdrv_flags, &s->open_flags, false); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 575 | |
Christoph Hellwig | 90babde | 2009-06-15 13:53:38 +0200 | [diff] [blame] | 576 | s->fd = -1; |
Kevin Wolf | 40ff6d7 | 2009-12-02 12:24:42 +0100 | [diff] [blame] | 577 | fd = qemu_open(filename, s->open_flags, 0644); |
Kevin Wolf | 64107dc | 2018-10-08 17:27:18 +0200 | [diff] [blame] | 578 | ret = fd < 0 ? -errno : 0; |
| 579 | |
Kevin Wolf | 64107dc | 2018-10-08 17:27:18 +0200 | [diff] [blame] | 580 | if (ret < 0) { |
Paolo Bonzini | f6fc1e3 | 2019-07-25 11:59:20 +0200 | [diff] [blame] | 581 | error_setg_file_open(errp, -ret, filename); |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 582 | if (ret == -EROFS) { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 583 | ret = -EACCES; |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 584 | } |
| 585 | goto fail; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 586 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 587 | s->fd = fd; |
Christoph Hellwig | 9ef91a6 | 2009-08-20 16:58:19 +0200 | [diff] [blame] | 588 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 589 | s->perm = 0; |
| 590 | s->shared_perm = BLK_PERM_ALL; |
| 591 | |
Christoph Hellwig | 5c6c3a6 | 2009-08-20 16:58:35 +0200 | [diff] [blame] | 592 | #ifdef CONFIG_LINUX_AIO |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 593 | /* Currently Linux does AIO only for files opened with O_DIRECT */ |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 594 | if (s->use_linux_aio) { |
| 595 | if (!(s->open_flags & O_DIRECT)) { |
| 596 | error_setg(errp, "aio=native was specified, but it requires " |
| 597 | "cache.direct=on, which was not specified."); |
| 598 | ret = -EINVAL; |
| 599 | goto fail; |
| 600 | } |
| 601 | if (!aio_setup_linux_aio(bdrv_get_aio_context(bs), errp)) { |
| 602 | error_prepend(errp, "Unable to use native AIO: "); |
| 603 | goto fail; |
| 604 | } |
Kevin Wolf | 9651825 | 2015-03-17 13:45:21 +0100 | [diff] [blame] | 605 | } |
Stefan Hajnoczi | 1501ecc | 2015-07-23 13:48:34 +0100 | [diff] [blame] | 606 | #else |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 607 | if (s->use_linux_aio) { |
Kevin Wolf | d657c0c | 2015-12-15 11:35:36 +0100 | [diff] [blame] | 608 | error_setg(errp, "aio=native was specified, but is not supported " |
| 609 | "in this build."); |
| 610 | ret = -EINVAL; |
| 611 | goto fail; |
Stefan Hajnoczi | 1501ecc | 2015-07-23 13:48:34 +0100 | [diff] [blame] | 612 | } |
| 613 | #endif /* !defined(CONFIG_LINUX_AIO) */ |
Christoph Hellwig | 9ef91a6 | 2009-08-20 16:58:19 +0200 | [diff] [blame] | 614 | |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 615 | #ifdef CONFIG_LINUX_IO_URING |
| 616 | if (s->use_linux_io_uring) { |
| 617 | if (!aio_setup_linux_io_uring(bdrv_get_aio_context(bs), errp)) { |
| 618 | error_prepend(errp, "Unable to use io_uring: "); |
| 619 | goto fail; |
| 620 | } |
| 621 | } |
| 622 | #else |
| 623 | if (s->use_linux_io_uring) { |
| 624 | error_setg(errp, "aio=io_uring was specified, but is not supported " |
| 625 | "in this build."); |
| 626 | ret = -EINVAL; |
| 627 | goto fail; |
| 628 | } |
| 629 | #endif /* !defined(CONFIG_LINUX_IO_URING) */ |
| 630 | |
Paolo Bonzini | 7ce2101 | 2013-11-22 13:39:47 +0100 | [diff] [blame] | 631 | s->has_discard = true; |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 632 | s->has_write_zeroes = true; |
Roger Pau Monne | 3cad830 | 2014-10-21 16:03:03 +0200 | [diff] [blame] | 633 | if ((bs->open_flags & BDRV_O_NOCACHE) != 0) { |
| 634 | s->needs_alignment = true; |
| 635 | } |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 636 | |
| 637 | if (fstat(s->fd, &st) < 0) { |
Max Reitz | 01212d4 | 2014-12-02 18:32:53 +0100 | [diff] [blame] | 638 | ret = -errno; |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 639 | error_setg_errno(errp, errno, "Could not stat file"); |
| 640 | goto fail; |
| 641 | } |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 642 | |
| 643 | if (!device) { |
| 644 | if (S_ISBLK(st.st_mode)) { |
| 645 | warn_report("Opening a block device as a file using the '%s' " |
| 646 | "driver is deprecated", bs->drv->format_name); |
| 647 | } else if (S_ISCHR(st.st_mode)) { |
| 648 | warn_report("Opening a character device as a file using the '%s' " |
| 649 | "driver is deprecated", bs->drv->format_name); |
| 650 | } else if (!S_ISREG(st.st_mode)) { |
| 651 | error_setg(errp, "A regular file was expected by the '%s' driver, " |
| 652 | "but something else was given", bs->drv->format_name); |
| 653 | ret = -EINVAL; |
| 654 | goto fail; |
| 655 | } else { |
| 656 | s->discard_zeroes = true; |
| 657 | s->has_fallocate = true; |
| 658 | } |
| 659 | } else { |
| 660 | if (!(S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
| 661 | error_setg(errp, "'%s' driver expects either " |
| 662 | "a character or block device", bs->drv->format_name); |
| 663 | ret = -EINVAL; |
| 664 | goto fail; |
| 665 | } |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 666 | } |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 667 | |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 668 | if (S_ISBLK(st.st_mode)) { |
| 669 | #ifdef BLKDISCARDZEROES |
| 670 | unsigned int arg; |
| 671 | if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) { |
| 672 | s->discard_zeroes = true; |
| 673 | } |
| 674 | #endif |
| 675 | #ifdef __linux__ |
| 676 | /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do |
| 677 | * not rely on the contents of discarded blocks unless using O_DIRECT. |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 678 | * Same for BLKZEROOUT. |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 679 | */ |
| 680 | if (!(bs->open_flags & BDRV_O_NOCACHE)) { |
| 681 | s->discard_zeroes = false; |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 682 | s->has_write_zeroes = false; |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 683 | } |
| 684 | #endif |
| 685 | } |
Roger Pau Monne | 3cad830 | 2014-10-21 16:03:03 +0200 | [diff] [blame] | 686 | #ifdef __FreeBSD__ |
| 687 | if (S_ISCHR(st.st_mode)) { |
| 688 | /* |
| 689 | * The file is a char device (disk), which on FreeBSD isn't behind |
| 690 | * a pager, so force all requests to be aligned. This is needed |
| 691 | * so QEMU makes sure all IO operations on the device are aligned |
| 692 | * to sector size, or else FreeBSD will reject them with EINVAL. |
| 693 | */ |
| 694 | s->needs_alignment = true; |
| 695 | } |
| 696 | #endif |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 697 | |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 698 | #ifdef CONFIG_XFS |
| 699 | if (platform_test_xfs_fd(s->fd)) { |
Paolo Bonzini | 7ce2101 | 2013-11-22 13:39:47 +0100 | [diff] [blame] | 700 | s->is_xfs = true; |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 701 | } |
| 702 | #endif |
| 703 | |
Kevin Wolf | 738301e | 2019-03-22 13:45:23 +0100 | [diff] [blame] | 704 | bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK; |
Kevin Wolf | 2f0c6e7 | 2020-04-24 14:54:44 +0200 | [diff] [blame] | 705 | if (S_ISREG(st.st_mode)) { |
| 706 | /* When extending regular files, we get zeros from the OS */ |
| 707 | bs->supported_truncate_flags = BDRV_REQ_ZERO_WRITE; |
| 708 | } |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 709 | ret = 0; |
| 710 | fail: |
Kevin Wolf | 8bfea15 | 2014-04-11 19:16:36 +0200 | [diff] [blame] | 711 | if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) { |
| 712 | unlink(filename); |
| 713 | } |
Kevin Wolf | c66a615 | 2013-04-02 10:47:40 +0200 | [diff] [blame] | 714 | qemu_opts_del(opts); |
| 715 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 716 | } |
| 717 | |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 718 | static int raw_open(BlockDriverState *bs, QDict *options, int flags, |
| 719 | Error **errp) |
Christoph Hellwig | 90babde | 2009-06-15 13:53:38 +0200 | [diff] [blame] | 720 | { |
| 721 | BDRVRawState *s = bs->opaque; |
| 722 | |
| 723 | s->type = FTYPE_FILE; |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 724 | return raw_open_common(bs, options, flags, 0, false, errp); |
Christoph Hellwig | 90babde | 2009-06-15 13:53:38 +0200 | [diff] [blame] | 725 | } |
| 726 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 727 | typedef enum { |
| 728 | RAW_PL_PREPARE, |
| 729 | RAW_PL_COMMIT, |
| 730 | RAW_PL_ABORT, |
| 731 | } RawPermLockOp; |
| 732 | |
| 733 | #define PERM_FOREACH(i) \ |
| 734 | for ((i) = 0; (1ULL << (i)) <= BLK_PERM_ALL; i++) |
| 735 | |
| 736 | /* Lock bytes indicated by @perm_lock_bits and @shared_perm_lock_bits in the |
| 737 | * file; if @unlock == true, also unlock the unneeded bytes. |
| 738 | * @shared_perm_lock_bits is the mask of all permissions that are NOT shared. |
| 739 | */ |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 740 | static int raw_apply_lock_bytes(BDRVRawState *s, int fd, |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 741 | uint64_t perm_lock_bits, |
| 742 | uint64_t shared_perm_lock_bits, |
| 743 | bool unlock, Error **errp) |
| 744 | { |
| 745 | int ret; |
| 746 | int i; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 747 | uint64_t locked_perm, locked_shared_perm; |
| 748 | |
| 749 | if (s) { |
| 750 | locked_perm = s->locked_perm; |
| 751 | locked_shared_perm = s->locked_shared_perm; |
| 752 | } else { |
| 753 | /* |
| 754 | * We don't have the previous bits, just lock/unlock for each of the |
| 755 | * requested bits. |
| 756 | */ |
| 757 | if (unlock) { |
| 758 | locked_perm = BLK_PERM_ALL; |
| 759 | locked_shared_perm = BLK_PERM_ALL; |
| 760 | } else { |
| 761 | locked_perm = 0; |
| 762 | locked_shared_perm = 0; |
| 763 | } |
| 764 | } |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 765 | |
| 766 | PERM_FOREACH(i) { |
| 767 | int off = RAW_LOCK_PERM_BASE + i; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 768 | uint64_t bit = (1ULL << i); |
| 769 | if ((perm_lock_bits & bit) && !(locked_perm & bit)) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 770 | ret = qemu_lock_fd(fd, off, 1, false); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 771 | if (ret) { |
| 772 | error_setg(errp, "Failed to lock byte %d", off); |
| 773 | return ret; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 774 | } else if (s) { |
| 775 | s->locked_perm |= bit; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 776 | } |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 777 | } else if (unlock && (locked_perm & bit) && !(perm_lock_bits & bit)) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 778 | ret = qemu_unlock_fd(fd, off, 1); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 779 | if (ret) { |
| 780 | error_setg(errp, "Failed to unlock byte %d", off); |
| 781 | return ret; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 782 | } else if (s) { |
| 783 | s->locked_perm &= ~bit; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 784 | } |
| 785 | } |
| 786 | } |
| 787 | PERM_FOREACH(i) { |
| 788 | int off = RAW_LOCK_SHARED_BASE + i; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 789 | uint64_t bit = (1ULL << i); |
| 790 | if ((shared_perm_lock_bits & bit) && !(locked_shared_perm & bit)) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 791 | ret = qemu_lock_fd(fd, off, 1, false); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 792 | if (ret) { |
| 793 | error_setg(errp, "Failed to lock byte %d", off); |
| 794 | return ret; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 795 | } else if (s) { |
| 796 | s->locked_shared_perm |= bit; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 797 | } |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 798 | } else if (unlock && (locked_shared_perm & bit) && |
| 799 | !(shared_perm_lock_bits & bit)) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 800 | ret = qemu_unlock_fd(fd, off, 1); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 801 | if (ret) { |
| 802 | error_setg(errp, "Failed to unlock byte %d", off); |
| 803 | return ret; |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 804 | } else if (s) { |
| 805 | s->locked_shared_perm &= ~bit; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 806 | } |
| 807 | } |
| 808 | } |
| 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | /* Check "unshared" bytes implied by @perm and ~@shared_perm in the file. */ |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 813 | static int raw_check_lock_bytes(int fd, uint64_t perm, uint64_t shared_perm, |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 814 | Error **errp) |
| 815 | { |
| 816 | int ret; |
| 817 | int i; |
| 818 | |
| 819 | PERM_FOREACH(i) { |
| 820 | int off = RAW_LOCK_SHARED_BASE + i; |
| 821 | uint64_t p = 1ULL << i; |
| 822 | if (perm & p) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 823 | ret = qemu_lock_fd_test(fd, off, 1, true); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 824 | if (ret) { |
| 825 | char *perm_name = bdrv_perm_names(p); |
| 826 | error_setg(errp, |
| 827 | "Failed to get \"%s\" lock", |
| 828 | perm_name); |
| 829 | g_free(perm_name); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 830 | return ret; |
| 831 | } |
| 832 | } |
| 833 | } |
| 834 | PERM_FOREACH(i) { |
| 835 | int off = RAW_LOCK_PERM_BASE + i; |
| 836 | uint64_t p = 1ULL << i; |
| 837 | if (!(shared_perm & p)) { |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 838 | ret = qemu_lock_fd_test(fd, off, 1, true); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 839 | if (ret) { |
| 840 | char *perm_name = bdrv_perm_names(p); |
| 841 | error_setg(errp, |
| 842 | "Failed to get shared \"%s\" lock", |
| 843 | perm_name); |
| 844 | g_free(perm_name); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 845 | return ret; |
| 846 | } |
| 847 | } |
| 848 | } |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static int raw_handle_perm_lock(BlockDriverState *bs, |
| 853 | RawPermLockOp op, |
| 854 | uint64_t new_perm, uint64_t new_shared, |
| 855 | Error **errp) |
| 856 | { |
| 857 | BDRVRawState *s = bs->opaque; |
| 858 | int ret = 0; |
| 859 | Error *local_err = NULL; |
| 860 | |
| 861 | if (!s->use_lock) { |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | if (bdrv_get_flags(bs) & BDRV_O_INACTIVE) { |
| 866 | return 0; |
| 867 | } |
| 868 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 869 | switch (op) { |
| 870 | case RAW_PL_PREPARE: |
Vladimir Sementsov-Ogievskiy | 696aaae | 2019-03-29 14:04:54 +0300 | [diff] [blame] | 871 | if ((s->perm | new_perm) == s->perm && |
| 872 | (s->shared_perm & new_shared) == s->shared_perm) |
| 873 | { |
| 874 | /* |
| 875 | * We are going to unlock bytes, it should not fail. If it fail due |
| 876 | * to some fs-dependent permission-unrelated reasons (which occurs |
| 877 | * sometimes on NFS and leads to abort in bdrv_replace_child) we |
| 878 | * can't prevent such errors by any check here. And we ignore them |
| 879 | * anyway in ABORT and COMMIT. |
| 880 | */ |
| 881 | return 0; |
| 882 | } |
Fam Zheng | f2e3af2 | 2018-10-11 15:21:34 +0800 | [diff] [blame] | 883 | ret = raw_apply_lock_bytes(s, s->fd, s->perm | new_perm, |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 884 | ~s->shared_perm | ~new_shared, |
| 885 | false, errp); |
| 886 | if (!ret) { |
Fam Zheng | f2e3af2 | 2018-10-11 15:21:34 +0800 | [diff] [blame] | 887 | ret = raw_check_lock_bytes(s->fd, new_perm, new_shared, errp); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 888 | if (!ret) { |
| 889 | return 0; |
| 890 | } |
Fam Zheng | b857431 | 2018-09-25 13:05:01 +0800 | [diff] [blame] | 891 | error_append_hint(errp, |
| 892 | "Is another process using the image [%s]?\n", |
| 893 | bs->filename); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 894 | } |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 895 | /* fall through to unlock bytes. */ |
| 896 | case RAW_PL_ABORT: |
Fam Zheng | f2e3af2 | 2018-10-11 15:21:34 +0800 | [diff] [blame] | 897 | raw_apply_lock_bytes(s, s->fd, s->perm, ~s->shared_perm, |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 898 | true, &local_err); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 899 | if (local_err) { |
| 900 | /* Theoretically the above call only unlocks bytes and it cannot |
| 901 | * fail. Something weird happened, report it. |
| 902 | */ |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 903 | warn_report_err(local_err); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 904 | } |
| 905 | break; |
| 906 | case RAW_PL_COMMIT: |
Fam Zheng | f2e3af2 | 2018-10-11 15:21:34 +0800 | [diff] [blame] | 907 | raw_apply_lock_bytes(s, s->fd, new_perm, ~new_shared, |
Max Reitz | d0a9615 | 2018-05-09 23:53:34 +0200 | [diff] [blame] | 908 | true, &local_err); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 909 | if (local_err) { |
| 910 | /* Theoretically the above call only unlocks bytes and it cannot |
| 911 | * fail. Something weird happened, report it. |
| 912 | */ |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 913 | warn_report_err(local_err); |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 914 | } |
| 915 | break; |
| 916 | } |
| 917 | return ret; |
| 918 | } |
| 919 | |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 920 | static int raw_reconfigure_getfd(BlockDriverState *bs, int flags, |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 921 | int *open_flags, uint64_t perm, bool force_dup, |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 922 | Error **errp) |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 923 | { |
| 924 | BDRVRawState *s = bs->opaque; |
| 925 | int fd = -1; |
| 926 | int ret; |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 927 | bool has_writers = perm & |
| 928 | (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED | BLK_PERM_RESIZE); |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 929 | int fcntl_flags = O_APPEND | O_NONBLOCK; |
| 930 | #ifdef O_NOATIME |
| 931 | fcntl_flags |= O_NOATIME; |
| 932 | #endif |
| 933 | |
| 934 | *open_flags = 0; |
| 935 | if (s->type == FTYPE_CD) { |
| 936 | *open_flags |= O_NONBLOCK; |
| 937 | } |
| 938 | |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 939 | raw_parse_flags(flags, open_flags, has_writers); |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 940 | |
| 941 | #ifdef O_ASYNC |
| 942 | /* Not all operating systems have O_ASYNC, and those that don't |
| 943 | * will not let us track the state into rs->open_flags (typically |
| 944 | * you achieve the same effect with an ioctl, for example I_SETSIG |
| 945 | * on Solaris). But we do not use O_ASYNC, so that's fine. |
| 946 | */ |
| 947 | assert((s->open_flags & O_ASYNC) == 0); |
| 948 | #endif |
| 949 | |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 950 | if (!force_dup && *open_flags == s->open_flags) { |
| 951 | /* We're lucky, the existing fd is fine */ |
| 952 | return s->fd; |
| 953 | } |
| 954 | |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 955 | if ((*open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) { |
| 956 | /* dup the original fd */ |
| 957 | fd = qemu_dup(s->fd); |
| 958 | if (fd >= 0) { |
| 959 | ret = fcntl_setfl(fd, *open_flags); |
| 960 | if (ret) { |
| 961 | qemu_close(fd); |
| 962 | fd = -1; |
| 963 | } |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */ |
| 968 | if (fd == -1) { |
| 969 | const char *normalized_filename = bs->filename; |
| 970 | ret = raw_normalize_devicepath(&normalized_filename, errp); |
| 971 | if (ret >= 0) { |
| 972 | assert(!(*open_flags & O_CREAT)); |
| 973 | fd = qemu_open(normalized_filename, *open_flags); |
| 974 | if (fd == -1) { |
| 975 | error_setg_errno(errp, errno, "Could not reopen file"); |
| 976 | return -1; |
| 977 | } |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | return fd; |
| 982 | } |
| 983 | |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 984 | static int raw_reopen_prepare(BDRVReopenState *state, |
| 985 | BlockReopenQueue *queue, Error **errp) |
| 986 | { |
| 987 | BDRVRawState *s; |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 988 | BDRVRawReopenState *rs; |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 989 | QemuOpts *opts; |
Kevin Wolf | a6aeca0 | 2019-03-01 22:48:45 +0100 | [diff] [blame] | 990 | int ret; |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 991 | Error *local_err = NULL; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 992 | |
| 993 | assert(state != NULL); |
| 994 | assert(state->bs != NULL); |
| 995 | |
| 996 | s = state->bs->opaque; |
| 997 | |
Markus Armbruster | 5839e53 | 2014-08-19 10:31:08 +0200 | [diff] [blame] | 998 | state->opaque = g_new0(BDRVRawReopenState, 1); |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 999 | rs = state->opaque; |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 1000 | |
| 1001 | /* Handle options changes */ |
| 1002 | opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort); |
| 1003 | qemu_opts_absorb_qdict(opts, state->options, &local_err); |
| 1004 | if (local_err) { |
| 1005 | error_propagate(errp, local_err); |
| 1006 | ret = -EINVAL; |
| 1007 | goto out; |
| 1008 | } |
| 1009 | |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 1010 | rs->drop_cache = qemu_opt_get_bool_del(opts, "drop-cache", true); |
Alberto Garcia | 8d32457 | 2018-09-06 12:37:07 +0300 | [diff] [blame] | 1011 | rs->check_cache_dropped = |
| 1012 | qemu_opt_get_bool_del(opts, "x-check-cache-dropped", false); |
| 1013 | |
| 1014 | /* This driver's reopen function doesn't currently allow changing |
| 1015 | * other options, so let's put them back in the original QDict and |
| 1016 | * bdrv_reopen_prepare() will detect changes and complain. */ |
| 1017 | qemu_opts_to_qdict(opts, state->options); |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1018 | |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 1019 | rs->fd = raw_reconfigure_getfd(state->bs, state->flags, &rs->open_flags, |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 1020 | state->perm, true, &local_err); |
Kevin Wolf | 5cec287 | 2019-03-02 00:26:30 +0100 | [diff] [blame] | 1021 | if (local_err) { |
| 1022 | error_propagate(errp, local_err); |
| 1023 | ret = -1; |
| 1024 | goto out; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1025 | } |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 1026 | |
| 1027 | /* Fail already reopen_prepare() if we can't get a working O_DIRECT |
| 1028 | * alignment with the new fd. */ |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1029 | if (rs->fd != -1) { |
| 1030 | raw_probe_alignment(state->bs, rs->fd, &local_err); |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 1031 | if (local_err) { |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 1032 | error_propagate(errp, local_err); |
| 1033 | ret = -EINVAL; |
Kevin Wolf | a6aeca0 | 2019-03-01 22:48:45 +0100 | [diff] [blame] | 1034 | goto out_fd; |
| 1035 | } |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 1036 | } |
| 1037 | |
Kevin Wolf | e0c9cf3 | 2019-03-07 19:07:35 +0100 | [diff] [blame] | 1038 | s->reopen_state = state; |
Kevin Wolf | a6aeca0 | 2019-03-01 22:48:45 +0100 | [diff] [blame] | 1039 | ret = 0; |
| 1040 | out_fd: |
| 1041 | if (ret < 0) { |
| 1042 | qemu_close(rs->fd); |
| 1043 | rs->fd = -1; |
| 1044 | } |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 1045 | out: |
| 1046 | qemu_opts_del(opts); |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1047 | return ret; |
| 1048 | } |
| 1049 | |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1050 | static void raw_reopen_commit(BDRVReopenState *state) |
| 1051 | { |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1052 | BDRVRawReopenState *rs = state->opaque; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1053 | BDRVRawState *s = state->bs->opaque; |
| 1054 | |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 1055 | s->drop_cache = rs->drop_cache; |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 1056 | s->check_cache_dropped = rs->check_cache_dropped; |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1057 | s->open_flags = rs->open_flags; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1058 | |
| 1059 | qemu_close(s->fd); |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1060 | s->fd = rs->fd; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1061 | |
| 1062 | g_free(state->opaque); |
| 1063 | state->opaque = NULL; |
Kevin Wolf | e0c9cf3 | 2019-03-07 19:07:35 +0100 | [diff] [blame] | 1064 | |
| 1065 | assert(s->reopen_state == state); |
| 1066 | s->reopen_state = NULL; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | |
| 1070 | static void raw_reopen_abort(BDRVReopenState *state) |
| 1071 | { |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1072 | BDRVRawReopenState *rs = state->opaque; |
Kevin Wolf | e0c9cf3 | 2019-03-07 19:07:35 +0100 | [diff] [blame] | 1073 | BDRVRawState *s = state->bs->opaque; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1074 | |
| 1075 | /* nothing to do if NULL, we didn't get far enough */ |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1076 | if (rs == NULL) { |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1077 | return; |
| 1078 | } |
| 1079 | |
Fam Zheng | 4e6d13c | 2016-10-27 18:45:17 +0800 | [diff] [blame] | 1080 | if (rs->fd >= 0) { |
| 1081 | qemu_close(rs->fd); |
| 1082 | rs->fd = -1; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1083 | } |
| 1084 | g_free(state->opaque); |
| 1085 | state->opaque = NULL; |
Kevin Wolf | e0c9cf3 | 2019-03-07 19:07:35 +0100 | [diff] [blame] | 1086 | |
| 1087 | assert(s->reopen_state == state); |
| 1088 | s->reopen_state = NULL; |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1089 | } |
| 1090 | |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1091 | static int sg_get_max_transfer_length(int fd) |
Fam Zheng | 6f60717 | 2016-06-03 10:07:02 +0800 | [diff] [blame] | 1092 | { |
| 1093 | #ifdef BLKSECTGET |
Eric Farman | 4826525 | 2017-01-20 17:25:26 +0100 | [diff] [blame] | 1094 | int max_bytes = 0; |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1095 | |
| 1096 | if (ioctl(fd, BLKSECTGET, &max_bytes) == 0) { |
Eric Farman | 4826525 | 2017-01-20 17:25:26 +0100 | [diff] [blame] | 1097 | return max_bytes; |
Fam Zheng | 6f60717 | 2016-06-03 10:07:02 +0800 | [diff] [blame] | 1098 | } else { |
| 1099 | return -errno; |
| 1100 | } |
| 1101 | #else |
| 1102 | return -ENOSYS; |
| 1103 | #endif |
| 1104 | } |
| 1105 | |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1106 | static int sg_get_max_segments(int fd) |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1107 | { |
| 1108 | #ifdef CONFIG_LINUX |
| 1109 | char buf[32]; |
| 1110 | const char *end; |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1111 | char *sysfspath = NULL; |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1112 | int ret; |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1113 | int sysfd = -1; |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1114 | long max_segments; |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1115 | struct stat st; |
| 1116 | |
| 1117 | if (fstat(fd, &st)) { |
| 1118 | ret = -errno; |
| 1119 | goto out; |
| 1120 | } |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1121 | |
| 1122 | sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments", |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1123 | major(st.st_rdev), minor(st.st_rdev)); |
| 1124 | sysfd = open(sysfspath, O_RDONLY); |
| 1125 | if (sysfd == -1) { |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1126 | ret = -errno; |
| 1127 | goto out; |
| 1128 | } |
| 1129 | do { |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1130 | ret = read(sysfd, buf, sizeof(buf) - 1); |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1131 | } while (ret == -1 && errno == EINTR); |
| 1132 | if (ret < 0) { |
| 1133 | ret = -errno; |
| 1134 | goto out; |
| 1135 | } else if (ret == 0) { |
| 1136 | ret = -EIO; |
| 1137 | goto out; |
| 1138 | } |
| 1139 | buf[ret] = 0; |
| 1140 | /* The file is ended with '\n', pass 'end' to accept that. */ |
| 1141 | ret = qemu_strtol(buf, &end, 10, &max_segments); |
| 1142 | if (ret == 0 && end && *end == '\n') { |
| 1143 | ret = max_segments; |
| 1144 | } |
| 1145 | |
| 1146 | out: |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1147 | if (sysfd != -1) { |
| 1148 | close(sysfd); |
Fam Zheng | fed414d | 2017-03-15 00:12:05 +0800 | [diff] [blame] | 1149 | } |
Fam Zheng | 9103f1c | 2017-03-08 20:08:14 +0800 | [diff] [blame] | 1150 | g_free(sysfspath); |
| 1151 | return ret; |
| 1152 | #else |
| 1153 | return -ENOTSUP; |
| 1154 | #endif |
| 1155 | } |
| 1156 | |
Kevin Wolf | 3baca89 | 2014-07-16 17:48:16 +0200 | [diff] [blame] | 1157 | static void raw_refresh_limits(BlockDriverState *bs, Error **errp) |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 1158 | { |
| 1159 | BDRVRawState *s = bs->opaque; |
Fam Zheng | 6f60717 | 2016-06-03 10:07:02 +0800 | [diff] [blame] | 1160 | |
Maxim Levitsky | 867eccf | 2019-07-04 15:43:42 +0300 | [diff] [blame] | 1161 | if (bs->sg) { |
| 1162 | int ret = sg_get_max_transfer_length(s->fd); |
| 1163 | |
| 1164 | if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) { |
| 1165 | bs->bl.max_transfer = pow2floor(ret); |
| 1166 | } |
| 1167 | |
| 1168 | ret = sg_get_max_segments(s->fd); |
| 1169 | if (ret > 0) { |
Wei Yang | 038adc2 | 2019-10-13 10:11:45 +0800 | [diff] [blame] | 1170 | bs->bl.max_transfer = MIN(bs->bl.max_transfer, |
| 1171 | ret * qemu_real_host_page_size); |
Fam Zheng | 6f60717 | 2016-06-03 10:07:02 +0800 | [diff] [blame] | 1172 | } |
| 1173 | } |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 1174 | |
Kevin Wolf | df26a35 | 2014-07-16 17:48:17 +0200 | [diff] [blame] | 1175 | raw_probe_alignment(bs, s->fd, errp); |
Denis V. Lunev | 4196d2f | 2015-05-12 17:30:55 +0300 | [diff] [blame] | 1176 | bs->bl.min_mem_alignment = s->buf_align; |
Wei Yang | 038adc2 | 2019-10-13 10:11:45 +0800 | [diff] [blame] | 1177 | bs->bl.opt_mem_alignment = MAX(s->buf_align, qemu_real_host_page_size); |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 1178 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1179 | |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 1180 | static int check_for_dasd(int fd) |
| 1181 | { |
| 1182 | #ifdef BIODASDINFO2 |
| 1183 | struct dasd_information2_t info = {0}; |
| 1184 | |
| 1185 | return ioctl(fd, BIODASDINFO2, &info); |
| 1186 | #else |
| 1187 | return -1; |
| 1188 | #endif |
| 1189 | } |
| 1190 | |
| 1191 | /** |
| 1192 | * Try to get @bs's logical and physical block size. |
| 1193 | * On success, store them in @bsz and return zero. |
| 1194 | * On failure, return negative errno. |
| 1195 | */ |
| 1196 | static int hdev_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz) |
| 1197 | { |
| 1198 | BDRVRawState *s = bs->opaque; |
| 1199 | int ret; |
| 1200 | |
| 1201 | /* If DASD, get blocksizes */ |
| 1202 | if (check_for_dasd(s->fd) < 0) { |
| 1203 | return -ENOTSUP; |
| 1204 | } |
| 1205 | ret = probe_logical_blocksize(s->fd, &bsz->log); |
| 1206 | if (ret < 0) { |
| 1207 | return ret; |
| 1208 | } |
| 1209 | return probe_physical_blocksize(s->fd, &bsz->phys); |
| 1210 | } |
| 1211 | |
| 1212 | /** |
| 1213 | * Try to get @bs's geometry: cyls, heads, sectors. |
| 1214 | * On success, store them in @geo and return 0. |
| 1215 | * On failure return -errno. |
| 1216 | * (Allows block driver to assign default geometry values that guest sees) |
| 1217 | */ |
| 1218 | #ifdef __linux__ |
| 1219 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) |
| 1220 | { |
| 1221 | BDRVRawState *s = bs->opaque; |
| 1222 | struct hd_geometry ioctl_geo = {0}; |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 1223 | |
| 1224 | /* If DASD, get its geometry */ |
| 1225 | if (check_for_dasd(s->fd) < 0) { |
| 1226 | return -ENOTSUP; |
| 1227 | } |
| 1228 | if (ioctl(s->fd, HDIO_GETGEO, &ioctl_geo) < 0) { |
| 1229 | return -errno; |
| 1230 | } |
| 1231 | /* HDIO_GETGEO may return success even though geo contains zeros |
| 1232 | (e.g. certain multipath setups) */ |
| 1233 | if (!ioctl_geo.heads || !ioctl_geo.sectors || !ioctl_geo.cylinders) { |
| 1234 | return -ENOTSUP; |
| 1235 | } |
| 1236 | /* Do not return a geometry for partition */ |
| 1237 | if (ioctl_geo.start != 0) { |
| 1238 | return -ENOTSUP; |
| 1239 | } |
| 1240 | geo->heads = ioctl_geo.heads; |
| 1241 | geo->sectors = ioctl_geo.sectors; |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 1242 | geo->cylinders = ioctl_geo.cylinders; |
| 1243 | |
| 1244 | return 0; |
| 1245 | } |
| 1246 | #else /* __linux__ */ |
| 1247 | static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo) |
| 1248 | { |
| 1249 | return -ENOTSUP; |
| 1250 | } |
| 1251 | #endif |
| 1252 | |
Kevin Wolf | 0342567 | 2018-10-31 11:30:42 +0100 | [diff] [blame] | 1253 | #if defined(__linux__) |
| 1254 | static int handle_aiocb_ioctl(void *opaque) |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1255 | { |
Kevin Wolf | 0342567 | 2018-10-31 11:30:42 +0100 | [diff] [blame] | 1256 | RawPosixAIOData *aiocb = opaque; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1257 | int ret; |
| 1258 | |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1259 | ret = ioctl(aiocb->aio_fildes, aiocb->ioctl.cmd, aiocb->ioctl.buf); |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1260 | if (ret == -1) { |
| 1261 | return -errno; |
| 1262 | } |
| 1263 | |
Paolo Bonzini | b608c8d | 2013-01-10 15:28:35 +0100 | [diff] [blame] | 1264 | return 0; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1265 | } |
Kevin Wolf | 0342567 | 2018-10-31 11:30:42 +0100 | [diff] [blame] | 1266 | #endif /* linux */ |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1267 | |
Kevin Wolf | 06dc9bd | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1268 | static int handle_aiocb_flush(void *opaque) |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1269 | { |
Kevin Wolf | 06dc9bd | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1270 | RawPosixAIOData *aiocb = opaque; |
Kevin Wolf | e5bcf96 | 2017-03-22 22:00:05 +0100 | [diff] [blame] | 1271 | BDRVRawState *s = aiocb->bs->opaque; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1272 | int ret; |
| 1273 | |
Kevin Wolf | e5bcf96 | 2017-03-22 22:00:05 +0100 | [diff] [blame] | 1274 | if (s->page_cache_inconsistent) { |
| 1275 | return -EIO; |
| 1276 | } |
| 1277 | |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1278 | ret = qemu_fdatasync(aiocb->aio_fildes); |
| 1279 | if (ret == -1) { |
Kevin Wolf | e5bcf96 | 2017-03-22 22:00:05 +0100 | [diff] [blame] | 1280 | /* There is no clear definition of the semantics of a failing fsync(), |
| 1281 | * so we may have to assume the worst. The sad truth is that this |
| 1282 | * assumption is correct for Linux. Some pages are now probably marked |
| 1283 | * clean in the page cache even though they are inconsistent with the |
| 1284 | * on-disk contents. The next fdatasync() call would succeed, but no |
| 1285 | * further writeback attempt will be made. We can't get back to a state |
| 1286 | * in which we know what is on disk (we would have to rewrite |
| 1287 | * everything that was touched since the last fdatasync() at least), so |
| 1288 | * make bdrv_flush() fail permanently. Given that the behaviour isn't |
| 1289 | * really defined, I have little hope that other OSes are doing better. |
| 1290 | * |
| 1291 | * Obviously, this doesn't affect O_DIRECT, which bypasses the page |
| 1292 | * cache. */ |
| 1293 | if ((s->open_flags & O_DIRECT) == 0) { |
| 1294 | s->page_cache_inconsistent = true; |
| 1295 | } |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1296 | return -errno; |
| 1297 | } |
| 1298 | return 0; |
| 1299 | } |
| 1300 | |
| 1301 | #ifdef CONFIG_PREADV |
| 1302 | |
| 1303 | static bool preadv_present = true; |
| 1304 | |
| 1305 | static ssize_t |
| 1306 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) |
| 1307 | { |
| 1308 | return preadv(fd, iov, nr_iov, offset); |
| 1309 | } |
| 1310 | |
| 1311 | static ssize_t |
| 1312 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) |
| 1313 | { |
| 1314 | return pwritev(fd, iov, nr_iov, offset); |
| 1315 | } |
| 1316 | |
| 1317 | #else |
| 1318 | |
| 1319 | static bool preadv_present = false; |
| 1320 | |
| 1321 | static ssize_t |
| 1322 | qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset) |
| 1323 | { |
| 1324 | return -ENOSYS; |
| 1325 | } |
| 1326 | |
| 1327 | static ssize_t |
| 1328 | qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset) |
| 1329 | { |
| 1330 | return -ENOSYS; |
| 1331 | } |
| 1332 | |
| 1333 | #endif |
| 1334 | |
| 1335 | static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb) |
| 1336 | { |
| 1337 | ssize_t len; |
| 1338 | |
| 1339 | do { |
| 1340 | if (aiocb->aio_type & QEMU_AIO_WRITE) |
| 1341 | len = qemu_pwritev(aiocb->aio_fildes, |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1342 | aiocb->io.iov, |
| 1343 | aiocb->io.niov, |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1344 | aiocb->aio_offset); |
| 1345 | else |
| 1346 | len = qemu_preadv(aiocb->aio_fildes, |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1347 | aiocb->io.iov, |
| 1348 | aiocb->io.niov, |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1349 | aiocb->aio_offset); |
| 1350 | } while (len == -1 && errno == EINTR); |
| 1351 | |
| 1352 | if (len == -1) { |
| 1353 | return -errno; |
| 1354 | } |
| 1355 | return len; |
| 1356 | } |
| 1357 | |
| 1358 | /* |
| 1359 | * Read/writes the data to/from a given linear buffer. |
| 1360 | * |
| 1361 | * Returns the number of bytes handles or -errno in case of an error. Short |
| 1362 | * reads are only returned if the end of the file is reached. |
| 1363 | */ |
| 1364 | static ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf) |
| 1365 | { |
| 1366 | ssize_t offset = 0; |
| 1367 | ssize_t len; |
| 1368 | |
| 1369 | while (offset < aiocb->aio_nbytes) { |
| 1370 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
| 1371 | len = pwrite(aiocb->aio_fildes, |
| 1372 | (const char *)buf + offset, |
| 1373 | aiocb->aio_nbytes - offset, |
| 1374 | aiocb->aio_offset + offset); |
| 1375 | } else { |
| 1376 | len = pread(aiocb->aio_fildes, |
| 1377 | buf + offset, |
| 1378 | aiocb->aio_nbytes - offset, |
| 1379 | aiocb->aio_offset + offset); |
| 1380 | } |
| 1381 | if (len == -1 && errno == EINTR) { |
| 1382 | continue; |
Stefan Hajnoczi | 61ed73c | 2014-08-21 13:44:07 +0100 | [diff] [blame] | 1383 | } else if (len == -1 && errno == EINVAL && |
| 1384 | (aiocb->bs->open_flags & BDRV_O_NOCACHE) && |
| 1385 | !(aiocb->aio_type & QEMU_AIO_WRITE) && |
| 1386 | offset > 0) { |
| 1387 | /* O_DIRECT pread() may fail with EINVAL when offset is unaligned |
| 1388 | * after a short read. Assume that O_DIRECT short reads only occur |
| 1389 | * at EOF. Therefore this is a short read, not an I/O error. |
| 1390 | */ |
| 1391 | break; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1392 | } else if (len == -1) { |
| 1393 | offset = -errno; |
| 1394 | break; |
| 1395 | } else if (len == 0) { |
| 1396 | break; |
| 1397 | } |
| 1398 | offset += len; |
| 1399 | } |
| 1400 | |
| 1401 | return offset; |
| 1402 | } |
| 1403 | |
Kevin Wolf | 999e6b6 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1404 | static int handle_aiocb_rw(void *opaque) |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1405 | { |
Kevin Wolf | 999e6b6 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1406 | RawPosixAIOData *aiocb = opaque; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1407 | ssize_t nbytes; |
| 1408 | char *buf; |
| 1409 | |
| 1410 | if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) { |
| 1411 | /* |
| 1412 | * If there is just a single buffer, and it is properly aligned |
| 1413 | * we can just use plain pread/pwrite without any problems. |
| 1414 | */ |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1415 | if (aiocb->io.niov == 1) { |
Kevin Wolf | 54c7ca1 | 2018-10-31 09:43:17 +0100 | [diff] [blame] | 1416 | nbytes = handle_aiocb_rw_linear(aiocb, aiocb->io.iov->iov_base); |
| 1417 | goto out; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1418 | } |
| 1419 | /* |
| 1420 | * We have more than one iovec, and all are properly aligned. |
| 1421 | * |
| 1422 | * Try preadv/pwritev first and fall back to linearizing the |
| 1423 | * buffer if it's not supported. |
| 1424 | */ |
| 1425 | if (preadv_present) { |
| 1426 | nbytes = handle_aiocb_rw_vector(aiocb); |
| 1427 | if (nbytes == aiocb->aio_nbytes || |
| 1428 | (nbytes < 0 && nbytes != -ENOSYS)) { |
Kevin Wolf | 54c7ca1 | 2018-10-31 09:43:17 +0100 | [diff] [blame] | 1429 | goto out; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1430 | } |
| 1431 | preadv_present = false; |
| 1432 | } |
| 1433 | |
| 1434 | /* |
| 1435 | * XXX(hch): short read/write. no easy way to handle the reminder |
| 1436 | * using these interfaces. For now retry using plain |
| 1437 | * pread/pwrite? |
| 1438 | */ |
| 1439 | } |
| 1440 | |
| 1441 | /* |
| 1442 | * Ok, we have to do it the hard way, copy all segments into |
| 1443 | * a single aligned buffer. |
| 1444 | */ |
Kevin Wolf | 50d4a85 | 2014-05-21 18:02:42 +0200 | [diff] [blame] | 1445 | buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes); |
| 1446 | if (buf == NULL) { |
Kevin Wolf | 54c7ca1 | 2018-10-31 09:43:17 +0100 | [diff] [blame] | 1447 | nbytes = -ENOMEM; |
| 1448 | goto out; |
Kevin Wolf | 50d4a85 | 2014-05-21 18:02:42 +0200 | [diff] [blame] | 1449 | } |
| 1450 | |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1451 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
| 1452 | char *p = buf; |
| 1453 | int i; |
| 1454 | |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1455 | for (i = 0; i < aiocb->io.niov; ++i) { |
| 1456 | memcpy(p, aiocb->io.iov[i].iov_base, aiocb->io.iov[i].iov_len); |
| 1457 | p += aiocb->io.iov[i].iov_len; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1458 | } |
Kevin Wolf | 8eb029c | 2014-07-01 16:09:54 +0200 | [diff] [blame] | 1459 | assert(p - buf == aiocb->aio_nbytes); |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1460 | } |
| 1461 | |
| 1462 | nbytes = handle_aiocb_rw_linear(aiocb, buf); |
| 1463 | if (!(aiocb->aio_type & QEMU_AIO_WRITE)) { |
| 1464 | char *p = buf; |
| 1465 | size_t count = aiocb->aio_nbytes, copy; |
| 1466 | int i; |
| 1467 | |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1468 | for (i = 0; i < aiocb->io.niov && count; ++i) { |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1469 | copy = count; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1470 | if (copy > aiocb->io.iov[i].iov_len) { |
| 1471 | copy = aiocb->io.iov[i].iov_len; |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1472 | } |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1473 | memcpy(aiocb->io.iov[i].iov_base, p, copy); |
Kevin Wolf | 8eb029c | 2014-07-01 16:09:54 +0200 | [diff] [blame] | 1474 | assert(count >= copy); |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1475 | p += copy; |
| 1476 | count -= copy; |
| 1477 | } |
Kevin Wolf | 8eb029c | 2014-07-01 16:09:54 +0200 | [diff] [blame] | 1478 | assert(count == 0); |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1479 | } |
| 1480 | qemu_vfree(buf); |
| 1481 | |
Kevin Wolf | 54c7ca1 | 2018-10-31 09:43:17 +0100 | [diff] [blame] | 1482 | out: |
| 1483 | if (nbytes == aiocb->aio_nbytes) { |
| 1484 | return 0; |
| 1485 | } else if (nbytes >= 0 && nbytes < aiocb->aio_nbytes) { |
| 1486 | if (aiocb->aio_type & QEMU_AIO_WRITE) { |
| 1487 | return -EINVAL; |
| 1488 | } else { |
| 1489 | iov_memset(aiocb->io.iov, aiocb->io.niov, nbytes, |
| 1490 | 0, aiocb->aio_nbytes - nbytes); |
| 1491 | return 0; |
| 1492 | } |
| 1493 | } else { |
| 1494 | assert(nbytes < 0); |
| 1495 | return nbytes; |
| 1496 | } |
Paolo Bonzini | de81a16 | 2012-05-25 11:46:27 +0200 | [diff] [blame] | 1497 | } |
| 1498 | |
Denis V. Lunev | 1486df0 | 2015-01-30 11:42:11 +0300 | [diff] [blame] | 1499 | static int translate_err(int err) |
| 1500 | { |
| 1501 | if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP || |
| 1502 | err == -ENOTTY) { |
| 1503 | err = -ENOTSUP; |
| 1504 | } |
| 1505 | return err; |
| 1506 | } |
| 1507 | |
Denis V. Lunev | d50d822 | 2015-01-30 11:42:15 +0300 | [diff] [blame] | 1508 | #ifdef CONFIG_FALLOCATE |
Denis V. Lunev | 0b99171 | 2015-01-30 11:42:12 +0300 | [diff] [blame] | 1509 | static int do_fallocate(int fd, int mode, off_t offset, off_t len) |
| 1510 | { |
| 1511 | do { |
| 1512 | if (fallocate(fd, mode, offset, len) == 0) { |
| 1513 | return 0; |
| 1514 | } |
| 1515 | } while (errno == EINTR); |
| 1516 | return translate_err(-errno); |
| 1517 | } |
| 1518 | #endif |
| 1519 | |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1520 | static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb) |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1521 | { |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1522 | int ret = -ENOTSUP; |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1523 | BDRVRawState *s = aiocb->bs->opaque; |
| 1524 | |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1525 | if (!s->has_write_zeroes) { |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1526 | return -ENOTSUP; |
| 1527 | } |
| 1528 | |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1529 | #ifdef BLKZEROOUT |
Kevin Wolf | 738301e | 2019-03-22 13:45:23 +0100 | [diff] [blame] | 1530 | /* The BLKZEROOUT implementation in the kernel doesn't set |
| 1531 | * BLKDEV_ZERO_NOFALLBACK, so we can't call this if we have to avoid slow |
| 1532 | * fallbacks. */ |
| 1533 | if (!(aiocb->aio_type & QEMU_AIO_NO_FALLBACK)) { |
| 1534 | do { |
| 1535 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; |
| 1536 | if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) { |
| 1537 | return 0; |
| 1538 | } |
| 1539 | } while (errno == EINTR); |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1540 | |
Kevin Wolf | 738301e | 2019-03-22 13:45:23 +0100 | [diff] [blame] | 1541 | ret = translate_err(-errno); |
Kevin Wolf | effecce | 2019-08-16 11:48:17 +0200 | [diff] [blame] | 1542 | if (ret == -ENOTSUP) { |
| 1543 | s->has_write_zeroes = false; |
| 1544 | } |
Kevin Wolf | 738301e | 2019-03-22 13:45:23 +0100 | [diff] [blame] | 1545 | } |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1546 | #endif |
| 1547 | |
Paolo Bonzini | 97a2ae3 | 2013-11-22 13:39:57 +0100 | [diff] [blame] | 1548 | return ret; |
| 1549 | } |
| 1550 | |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1551 | static int handle_aiocb_write_zeroes(void *opaque) |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1552 | { |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1553 | RawPosixAIOData *aiocb = opaque; |
Denis V. Lunev | 70d9110 | 2017-08-04 18:10:11 +0300 | [diff] [blame] | 1554 | #ifdef CONFIG_FALLOCATE |
Max Reitz | b2c6f23 | 2019-08-23 15:03:40 +0200 | [diff] [blame] | 1555 | BDRVRawState *s = aiocb->bs->opaque; |
Denis V. Lunev | 70d9110 | 2017-08-04 18:10:11 +0300 | [diff] [blame] | 1556 | int64_t len; |
| 1557 | #endif |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1558 | |
| 1559 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { |
| 1560 | return handle_aiocb_write_zeroes_block(aiocb); |
| 1561 | } |
| 1562 | |
Denis V. Lunev | b953f07 | 2015-01-30 11:42:14 +0300 | [diff] [blame] | 1563 | #ifdef CONFIG_FALLOCATE_ZERO_RANGE |
| 1564 | if (s->has_write_zeroes) { |
| 1565 | int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE, |
| 1566 | aiocb->aio_offset, aiocb->aio_nbytes); |
Andrey Shinkevich | 294682c | 2019-08-27 16:52:53 +0300 | [diff] [blame] | 1567 | if (ret == -EINVAL) { |
| 1568 | /* |
| 1569 | * Allow falling back to pwrite for file systems that |
| 1570 | * do not support fallocate() for an unaligned byte range. |
| 1571 | */ |
| 1572 | return -ENOTSUP; |
| 1573 | } |
Denis V. Lunev | b953f07 | 2015-01-30 11:42:14 +0300 | [diff] [blame] | 1574 | if (ret == 0 || ret != -ENOTSUP) { |
| 1575 | return ret; |
| 1576 | } |
| 1577 | s->has_write_zeroes = false; |
| 1578 | } |
| 1579 | #endif |
| 1580 | |
Denis V. Lunev | 1cdc323 | 2015-01-30 11:42:16 +0300 | [diff] [blame] | 1581 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
| 1582 | if (s->has_discard && s->has_fallocate) { |
| 1583 | int ret = do_fallocate(s->fd, |
| 1584 | FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| 1585 | aiocb->aio_offset, aiocb->aio_nbytes); |
| 1586 | if (ret == 0) { |
| 1587 | ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); |
| 1588 | if (ret == 0 || ret != -ENOTSUP) { |
| 1589 | return ret; |
| 1590 | } |
| 1591 | s->has_fallocate = false; |
| 1592 | } else if (ret != -ENOTSUP) { |
| 1593 | return ret; |
| 1594 | } else { |
| 1595 | s->has_discard = false; |
| 1596 | } |
| 1597 | } |
| 1598 | #endif |
| 1599 | |
Denis V. Lunev | d50d822 | 2015-01-30 11:42:15 +0300 | [diff] [blame] | 1600 | #ifdef CONFIG_FALLOCATE |
Denis V. Lunev | 70d9110 | 2017-08-04 18:10:11 +0300 | [diff] [blame] | 1601 | /* Last resort: we are trying to extend the file with zeroed data. This |
| 1602 | * can be done via fallocate(fd, 0) */ |
| 1603 | len = bdrv_getlength(aiocb->bs); |
| 1604 | if (s->has_fallocate && len >= 0 && aiocb->aio_offset >= len) { |
Denis V. Lunev | d50d822 | 2015-01-30 11:42:15 +0300 | [diff] [blame] | 1605 | int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes); |
| 1606 | if (ret == 0 || ret != -ENOTSUP) { |
| 1607 | return ret; |
| 1608 | } |
| 1609 | s->has_fallocate = false; |
| 1610 | } |
| 1611 | #endif |
| 1612 | |
Denis V. Lunev | 37cc9f7 | 2015-01-30 11:42:13 +0300 | [diff] [blame] | 1613 | return -ENOTSUP; |
| 1614 | } |
| 1615 | |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1616 | static int handle_aiocb_write_zeroes_unmap(void *opaque) |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1617 | { |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1618 | RawPosixAIOData *aiocb = opaque; |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1619 | BDRVRawState *s G_GNUC_UNUSED = aiocb->bs->opaque; |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1620 | |
| 1621 | /* First try to write zeros and unmap at the same time */ |
| 1622 | |
| 1623 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
Simran Singhal | b3ac2b9 | 2020-04-01 22:23:14 +0530 | [diff] [blame] | 1624 | int ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| 1625 | aiocb->aio_offset, aiocb->aio_nbytes); |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1626 | if (ret != -ENOTSUP) { |
| 1627 | return ret; |
| 1628 | } |
| 1629 | #endif |
| 1630 | |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1631 | /* If we couldn't manage to unmap while guaranteed that the area reads as |
| 1632 | * all-zero afterwards, just write zeroes without unmapping */ |
Simran Singhal | b3ac2b9 | 2020-04-01 22:23:14 +0530 | [diff] [blame] | 1633 | return handle_aiocb_write_zeroes(aiocb); |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 1634 | } |
| 1635 | |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1636 | #ifndef HAVE_COPY_FILE_RANGE |
| 1637 | static off_t copy_file_range(int in_fd, off_t *in_off, int out_fd, |
| 1638 | off_t *out_off, size_t len, unsigned int flags) |
| 1639 | { |
| 1640 | #ifdef __NR_copy_file_range |
| 1641 | return syscall(__NR_copy_file_range, in_fd, in_off, out_fd, |
| 1642 | out_off, len, flags); |
| 1643 | #else |
| 1644 | errno = ENOSYS; |
| 1645 | return -1; |
| 1646 | #endif |
| 1647 | } |
| 1648 | #endif |
| 1649 | |
Kevin Wolf | 58a209c | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1650 | static int handle_aiocb_copy_range(void *opaque) |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1651 | { |
Kevin Wolf | 58a209c | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1652 | RawPosixAIOData *aiocb = opaque; |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1653 | uint64_t bytes = aiocb->aio_nbytes; |
| 1654 | off_t in_off = aiocb->aio_offset; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1655 | off_t out_off = aiocb->copy_range.aio_offset2; |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1656 | |
| 1657 | while (bytes) { |
| 1658 | ssize_t ret = copy_file_range(aiocb->aio_fildes, &in_off, |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1659 | aiocb->copy_range.aio_fd2, &out_off, |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1660 | bytes, 0); |
Fam Zheng | ecc983a | 2018-07-10 14:31:16 +0800 | [diff] [blame] | 1661 | trace_file_copy_file_range(aiocb->bs, aiocb->aio_fildes, in_off, |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1662 | aiocb->copy_range.aio_fd2, out_off, bytes, |
| 1663 | 0, ret); |
Fam Zheng | c436e3d | 2018-06-29 14:03:28 +0800 | [diff] [blame] | 1664 | if (ret == 0) { |
| 1665 | /* No progress (e.g. when beyond EOF), let the caller fall back to |
| 1666 | * buffer I/O. */ |
| 1667 | return -ENOSPC; |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1668 | } |
| 1669 | if (ret < 0) { |
Fam Zheng | c436e3d | 2018-06-29 14:03:28 +0800 | [diff] [blame] | 1670 | switch (errno) { |
| 1671 | case ENOSYS: |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1672 | return -ENOTSUP; |
Fam Zheng | c436e3d | 2018-06-29 14:03:28 +0800 | [diff] [blame] | 1673 | case EINTR: |
| 1674 | continue; |
| 1675 | default: |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1676 | return -errno; |
| 1677 | } |
| 1678 | } |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 1679 | bytes -= ret; |
| 1680 | } |
| 1681 | return 0; |
| 1682 | } |
| 1683 | |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1684 | static int handle_aiocb_discard(void *opaque) |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1685 | { |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1686 | RawPosixAIOData *aiocb = opaque; |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1687 | int ret = -EOPNOTSUPP; |
| 1688 | BDRVRawState *s = aiocb->bs->opaque; |
| 1689 | |
Paolo Bonzini | 7ce2101 | 2013-11-22 13:39:47 +0100 | [diff] [blame] | 1690 | if (!s->has_discard) { |
| 1691 | return -ENOTSUP; |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1692 | } |
| 1693 | |
| 1694 | if (aiocb->aio_type & QEMU_AIO_BLKDEV) { |
| 1695 | #ifdef BLKDISCARD |
| 1696 | do { |
| 1697 | uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes }; |
| 1698 | if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) { |
| 1699 | return 0; |
| 1700 | } |
| 1701 | } while (errno == EINTR); |
| 1702 | |
| 1703 | ret = -errno; |
| 1704 | #endif |
| 1705 | } else { |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1706 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
Denis V. Lunev | 0b99171 | 2015-01-30 11:42:12 +0300 | [diff] [blame] | 1707 | ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| 1708 | aiocb->aio_offset, aiocb->aio_nbytes); |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1709 | #endif |
| 1710 | } |
| 1711 | |
Denis V. Lunev | 1486df0 | 2015-01-30 11:42:11 +0300 | [diff] [blame] | 1712 | ret = translate_err(ret); |
| 1713 | if (ret == -ENOTSUP) { |
Paolo Bonzini | 7ce2101 | 2013-11-22 13:39:47 +0100 | [diff] [blame] | 1714 | s->has_discard = false; |
Paolo Bonzini | 8238010 | 2013-01-14 16:26:55 +0100 | [diff] [blame] | 1715 | } |
| 1716 | return ret; |
| 1717 | } |
| 1718 | |
Nir Soffer | 3a20013 | 2019-08-27 04:05:27 +0300 | [diff] [blame] | 1719 | /* |
| 1720 | * Help alignment probing by allocating the first block. |
| 1721 | * |
| 1722 | * When reading with direct I/O from unallocated area on Gluster backed by XFS, |
| 1723 | * reading succeeds regardless of request length. In this case we fallback to |
| 1724 | * safe alignment which is not optimal. Allocating the first block avoids this |
| 1725 | * fallback. |
| 1726 | * |
| 1727 | * fd may be opened with O_DIRECT, but we don't know the buffer alignment or |
| 1728 | * request alignment, so we use safe values. |
| 1729 | * |
| 1730 | * Returns: 0 on success, -errno on failure. Since this is an optimization, |
| 1731 | * caller may ignore failures. |
| 1732 | */ |
| 1733 | static int allocate_first_block(int fd, size_t max_size) |
| 1734 | { |
| 1735 | size_t write_size = (max_size < MAX_BLOCKSIZE) |
| 1736 | ? BDRV_SECTOR_SIZE |
| 1737 | : MAX_BLOCKSIZE; |
Wei Yang | 038adc2 | 2019-10-13 10:11:45 +0800 | [diff] [blame] | 1738 | size_t max_align = MAX(MAX_BLOCKSIZE, qemu_real_host_page_size); |
Nir Soffer | 3a20013 | 2019-08-27 04:05:27 +0300 | [diff] [blame] | 1739 | void *buf; |
| 1740 | ssize_t n; |
| 1741 | int ret; |
| 1742 | |
| 1743 | buf = qemu_memalign(max_align, write_size); |
| 1744 | memset(buf, 0, write_size); |
| 1745 | |
| 1746 | do { |
| 1747 | n = pwrite(fd, buf, write_size, 0); |
| 1748 | } while (n == -1 && errno == EINTR); |
| 1749 | |
| 1750 | ret = (n == -1) ? -errno : 0; |
| 1751 | |
| 1752 | qemu_vfree(buf); |
| 1753 | return ret; |
| 1754 | } |
| 1755 | |
Kevin Wolf | 29cb4c0 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1756 | static int handle_aiocb_truncate(void *opaque) |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1757 | { |
Kevin Wolf | 29cb4c0 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1758 | RawPosixAIOData *aiocb = opaque; |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1759 | int result = 0; |
| 1760 | int64_t current_length = 0; |
| 1761 | char *buf = NULL; |
| 1762 | struct stat st; |
| 1763 | int fd = aiocb->aio_fildes; |
| 1764 | int64_t offset = aiocb->aio_offset; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1765 | PreallocMode prealloc = aiocb->truncate.prealloc; |
| 1766 | Error **errp = aiocb->truncate.errp; |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1767 | |
| 1768 | if (fstat(fd, &st) < 0) { |
| 1769 | result = -errno; |
| 1770 | error_setg_errno(errp, -result, "Could not stat file"); |
| 1771 | return result; |
| 1772 | } |
| 1773 | |
| 1774 | current_length = st.st_size; |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1775 | if (current_length > offset && prealloc != PREALLOC_MODE_OFF) { |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1776 | error_setg(errp, "Cannot use preallocation for shrinking files"); |
| 1777 | return -ENOTSUP; |
| 1778 | } |
| 1779 | |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1780 | switch (prealloc) { |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1781 | #ifdef CONFIG_POSIX_FALLOCATE |
| 1782 | case PREALLOC_MODE_FALLOC: |
| 1783 | /* |
| 1784 | * Truncating before posix_fallocate() makes it about twice slower on |
| 1785 | * file systems that do not support fallocate(), trying to check if a |
| 1786 | * block is allocated before allocating it, so don't do that here. |
| 1787 | */ |
| 1788 | if (offset != current_length) { |
| 1789 | result = -posix_fallocate(fd, current_length, |
| 1790 | offset - current_length); |
| 1791 | if (result != 0) { |
| 1792 | /* posix_fallocate() doesn't set errno. */ |
| 1793 | error_setg_errno(errp, -result, |
| 1794 | "Could not preallocate new data"); |
Nir Soffer | 3a20013 | 2019-08-27 04:05:27 +0300 | [diff] [blame] | 1795 | } else if (current_length == 0) { |
| 1796 | /* |
| 1797 | * posix_fallocate() uses fallocate() if the filesystem |
| 1798 | * supports it, or fallback to manually writing zeroes. If |
| 1799 | * fallocate() was used, unaligned reads from the fallocated |
| 1800 | * area in raw_probe_alignment() will succeed, hence we need to |
| 1801 | * allocate the first block. |
| 1802 | * |
| 1803 | * Optimize future alignment probing; ignore failures. |
| 1804 | */ |
| 1805 | allocate_first_block(fd, offset); |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1806 | } |
| 1807 | } else { |
| 1808 | result = 0; |
| 1809 | } |
| 1810 | goto out; |
| 1811 | #endif |
| 1812 | case PREALLOC_MODE_FULL: |
| 1813 | { |
| 1814 | int64_t num = 0, left = offset - current_length; |
| 1815 | off_t seek_result; |
| 1816 | |
| 1817 | /* |
| 1818 | * Knowing the final size from the beginning could allow the file |
| 1819 | * system driver to do less allocations and possibly avoid |
| 1820 | * fragmentation of the file. |
| 1821 | */ |
| 1822 | if (ftruncate(fd, offset) != 0) { |
| 1823 | result = -errno; |
| 1824 | error_setg_errno(errp, -result, "Could not resize file"); |
| 1825 | goto out; |
| 1826 | } |
| 1827 | |
| 1828 | buf = g_malloc0(65536); |
| 1829 | |
| 1830 | seek_result = lseek(fd, current_length, SEEK_SET); |
| 1831 | if (seek_result < 0) { |
| 1832 | result = -errno; |
| 1833 | error_setg_errno(errp, -result, |
| 1834 | "Failed to seek to the old end of file"); |
| 1835 | goto out; |
| 1836 | } |
| 1837 | |
| 1838 | while (left > 0) { |
| 1839 | num = MIN(left, 65536); |
| 1840 | result = write(fd, buf, num); |
| 1841 | if (result < 0) { |
Fam Zheng | a1c81f4 | 2018-07-27 14:53:14 +0800 | [diff] [blame] | 1842 | if (errno == EINTR) { |
| 1843 | continue; |
| 1844 | } |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1845 | result = -errno; |
| 1846 | error_setg_errno(errp, -result, |
| 1847 | "Could not write zeros for preallocation"); |
| 1848 | goto out; |
| 1849 | } |
| 1850 | left -= result; |
| 1851 | } |
| 1852 | if (result >= 0) { |
| 1853 | result = fsync(fd); |
| 1854 | if (result < 0) { |
| 1855 | result = -errno; |
| 1856 | error_setg_errno(errp, -result, |
| 1857 | "Could not flush file to disk"); |
| 1858 | goto out; |
| 1859 | } |
| 1860 | } |
| 1861 | goto out; |
| 1862 | } |
| 1863 | case PREALLOC_MODE_OFF: |
| 1864 | if (ftruncate(fd, offset) != 0) { |
| 1865 | result = -errno; |
| 1866 | error_setg_errno(errp, -result, "Could not resize file"); |
Nir Soffer | 3a20013 | 2019-08-27 04:05:27 +0300 | [diff] [blame] | 1867 | } else if (current_length == 0 && offset > current_length) { |
| 1868 | /* Optimize future alignment probing; ignore failures. */ |
| 1869 | allocate_first_block(fd, offset); |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1870 | } |
| 1871 | return result; |
| 1872 | default: |
| 1873 | result = -ENOTSUP; |
| 1874 | error_setg(errp, "Unsupported preallocation mode: %s", |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 1875 | PreallocMode_str(prealloc)); |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 1876 | return result; |
| 1877 | } |
| 1878 | |
| 1879 | out: |
| 1880 | if (result < 0) { |
| 1881 | if (ftruncate(fd, current_length) < 0) { |
| 1882 | error_report("Failed to restore old file length: %s", |
| 1883 | strerror(errno)); |
| 1884 | } |
| 1885 | } |
| 1886 | |
| 1887 | g_free(buf); |
| 1888 | return result; |
| 1889 | } |
| 1890 | |
Kevin Wolf | 5d5de25 | 2018-10-26 16:53:47 +0100 | [diff] [blame] | 1891 | static int coroutine_fn raw_thread_pool_submit(BlockDriverState *bs, |
| 1892 | ThreadPoolFunc func, void *arg) |
| 1893 | { |
| 1894 | /* @bs can be NULL, bdrv_get_aio_context() returns the main context then */ |
| 1895 | ThreadPool *pool = aio_get_thread_pool(bdrv_get_aio_context(bs)); |
| 1896 | return thread_pool_submit_co(pool, func, arg); |
| 1897 | } |
| 1898 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 1899 | static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset, |
| 1900 | uint64_t bytes, QEMUIOVector *qiov, int type) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1901 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1902 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 999e6b6 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1903 | RawPosixAIOData acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1904 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1905 | if (fd_open(bs) < 0) |
Kevin Wolf | 2174f12 | 2014-08-06 17:18:07 +0200 | [diff] [blame] | 1906 | return -EIO; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1907 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 1908 | /* |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1909 | * When using O_DIRECT, the request must be aligned to be able to use |
| 1910 | * either libaio or io_uring interface. If not fail back to regular thread |
| 1911 | * pool read/write code which emulates this for us if we |
| 1912 | * set QEMU_AIO_MISALIGNED. |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 1913 | */ |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1914 | if (s->needs_alignment && !bdrv_qiov_is_aligned(bs, qiov)) { |
| 1915 | type |= QEMU_AIO_MISALIGNED; |
| 1916 | #ifdef CONFIG_LINUX_IO_URING |
| 1917 | } else if (s->use_linux_io_uring) { |
| 1918 | LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); |
| 1919 | assert(qiov->size == bytes); |
| 1920 | return luring_co_submit(bs, aio, s->fd, offset, qiov, type); |
Stefan Weil | e44bd6f | 2009-08-28 14:39:31 +0200 | [diff] [blame] | 1921 | #endif |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1922 | #ifdef CONFIG_LINUX_AIO |
| 1923 | } else if (s->use_linux_aio) { |
| 1924 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
| 1925 | assert(qiov->size == bytes); |
| 1926 | return laio_co_submit(bs, aio, s->fd, offset, qiov, type); |
| 1927 | #endif |
Christoph Hellwig | 9ef91a6 | 2009-08-20 16:58:19 +0200 | [diff] [blame] | 1928 | } |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 1929 | |
Kevin Wolf | 999e6b6 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1930 | acb = (RawPosixAIOData) { |
| 1931 | .bs = bs, |
| 1932 | .aio_fildes = s->fd, |
| 1933 | .aio_type = type, |
| 1934 | .aio_offset = offset, |
| 1935 | .aio_nbytes = bytes, |
| 1936 | .io = { |
| 1937 | .iov = qiov->iov, |
| 1938 | .niov = qiov->niov, |
| 1939 | }, |
| 1940 | }; |
| 1941 | |
| 1942 | assert(qiov->size == bytes); |
| 1943 | return raw_thread_pool_submit(bs, handle_aiocb_rw, &acb); |
Kevin Wolf | 2174f12 | 2014-08-06 17:18:07 +0200 | [diff] [blame] | 1944 | } |
| 1945 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 1946 | static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset, |
| 1947 | uint64_t bytes, QEMUIOVector *qiov, |
| 1948 | int flags) |
Kevin Wolf | 2174f12 | 2014-08-06 17:18:07 +0200 | [diff] [blame] | 1949 | { |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 1950 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ); |
Kevin Wolf | 2174f12 | 2014-08-06 17:18:07 +0200 | [diff] [blame] | 1951 | } |
| 1952 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 1953 | static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset, |
| 1954 | uint64_t bytes, QEMUIOVector *qiov, |
| 1955 | int flags) |
Kevin Wolf | 2174f12 | 2014-08-06 17:18:07 +0200 | [diff] [blame] | 1956 | { |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 1957 | assert(flags == 0); |
| 1958 | return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1959 | } |
| 1960 | |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1961 | static void raw_aio_plug(BlockDriverState *bs) |
| 1962 | { |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1963 | BDRVRawState __attribute__((unused)) *s = bs->opaque; |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1964 | #ifdef CONFIG_LINUX_AIO |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 1965 | if (s->use_linux_aio) { |
Paolo Bonzini | 0187f5c | 2016-07-04 18:33:20 +0200 | [diff] [blame] | 1966 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
| 1967 | laio_io_plug(bs, aio); |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1968 | } |
| 1969 | #endif |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1970 | #ifdef CONFIG_LINUX_IO_URING |
| 1971 | if (s->use_linux_io_uring) { |
| 1972 | LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); |
| 1973 | luring_io_plug(bs, aio); |
| 1974 | } |
| 1975 | #endif |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1976 | } |
| 1977 | |
| 1978 | static void raw_aio_unplug(BlockDriverState *bs) |
| 1979 | { |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1980 | BDRVRawState __attribute__((unused)) *s = bs->opaque; |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1981 | #ifdef CONFIG_LINUX_AIO |
Kevin Wolf | 0a4279d | 2016-09-08 15:09:01 +0200 | [diff] [blame] | 1982 | if (s->use_linux_aio) { |
Paolo Bonzini | 0187f5c | 2016-07-04 18:33:20 +0200 | [diff] [blame] | 1983 | LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs)); |
| 1984 | laio_io_unplug(bs, aio); |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1985 | } |
| 1986 | #endif |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 1987 | #ifdef CONFIG_LINUX_IO_URING |
| 1988 | if (s->use_linux_io_uring) { |
| 1989 | LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); |
| 1990 | luring_io_unplug(bs, aio); |
| 1991 | } |
| 1992 | #endif |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 1993 | } |
| 1994 | |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 1995 | static int raw_co_flush_to_disk(BlockDriverState *bs) |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 1996 | { |
| 1997 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 06dc9bd | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 1998 | RawPosixAIOData acb; |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 1999 | int ret; |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2000 | |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 2001 | ret = fd_open(bs); |
| 2002 | if (ret < 0) { |
| 2003 | return ret; |
| 2004 | } |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2005 | |
Kevin Wolf | 06dc9bd | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2006 | acb = (RawPosixAIOData) { |
| 2007 | .bs = bs, |
| 2008 | .aio_fildes = s->fd, |
| 2009 | .aio_type = QEMU_AIO_FLUSH, |
| 2010 | }; |
| 2011 | |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 2012 | #ifdef CONFIG_LINUX_IO_URING |
| 2013 | if (s->use_linux_io_uring) { |
| 2014 | LuringState *aio = aio_get_linux_io_uring(bdrv_get_aio_context(bs)); |
| 2015 | return luring_co_submit(bs, aio, s->fd, 0, NULL, QEMU_AIO_FLUSH); |
| 2016 | } |
| 2017 | #endif |
Kevin Wolf | 06dc9bd | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2018 | return raw_thread_pool_submit(bs, handle_aiocb_flush, &acb); |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2019 | } |
| 2020 | |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 2021 | static void raw_aio_attach_aio_context(BlockDriverState *bs, |
| 2022 | AioContext *new_context) |
| 2023 | { |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 2024 | BDRVRawState __attribute__((unused)) *s = bs->opaque; |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 2025 | #ifdef CONFIG_LINUX_AIO |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 2026 | if (s->use_linux_aio) { |
Markus Armbruster | cb09104 | 2019-11-30 20:42:22 +0100 | [diff] [blame] | 2027 | Error *local_err = NULL; |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 2028 | if (!aio_setup_linux_aio(new_context, &local_err)) { |
| 2029 | error_reportf_err(local_err, "Unable to use native AIO, " |
| 2030 | "falling back to thread pool: "); |
| 2031 | s->use_linux_aio = false; |
| 2032 | } |
| 2033 | } |
| 2034 | #endif |
Aarushi Mehta | c644751 | 2020-01-20 14:18:51 +0000 | [diff] [blame] | 2035 | #ifdef CONFIG_LINUX_IO_URING |
| 2036 | if (s->use_linux_io_uring) { |
| 2037 | Error *local_err; |
| 2038 | if (!aio_setup_linux_io_uring(new_context, &local_err)) { |
| 2039 | error_reportf_err(local_err, "Unable to use linux io_uring, " |
| 2040 | "falling back to thread pool: "); |
| 2041 | s->use_linux_io_uring = false; |
| 2042 | } |
| 2043 | } |
| 2044 | #endif |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 2045 | } |
| 2046 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2047 | static void raw_close(BlockDriverState *bs) |
| 2048 | { |
| 2049 | BDRVRawState *s = bs->opaque; |
Stefan Hajnoczi | c2f3426 | 2014-05-08 16:34:47 +0200 | [diff] [blame] | 2050 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2051 | if (s->fd >= 0) { |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 2052 | qemu_close(s->fd); |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2053 | s->fd = -1; |
| 2054 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2055 | } |
| 2056 | |
Max Reitz | d0bc9e5 | 2017-06-13 22:20:58 +0200 | [diff] [blame] | 2057 | /** |
| 2058 | * Truncates the given regular file @fd to @offset and, when growing, fills the |
| 2059 | * new space according to @prealloc. |
| 2060 | * |
| 2061 | * Returns: 0 on success, -errno on failure. |
| 2062 | */ |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2063 | static int coroutine_fn |
| 2064 | raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset, |
| 2065 | PreallocMode prealloc, Error **errp) |
Max Reitz | 9f63b07 | 2017-06-13 22:20:57 +0200 | [diff] [blame] | 2066 | { |
Kevin Wolf | 29cb4c0 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2067 | RawPosixAIOData acb; |
Max Reitz | d0bc9e5 | 2017-06-13 22:20:58 +0200 | [diff] [blame] | 2068 | |
Kevin Wolf | 29cb4c0 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2069 | acb = (RawPosixAIOData) { |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2070 | .bs = bs, |
| 2071 | .aio_fildes = fd, |
| 2072 | .aio_type = QEMU_AIO_TRUNCATE, |
| 2073 | .aio_offset = offset, |
Kevin Wolf | d57c44d | 2018-10-25 16:21:14 +0100 | [diff] [blame] | 2074 | .truncate = { |
| 2075 | .prealloc = prealloc, |
| 2076 | .errp = errp, |
| 2077 | }, |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2078 | }; |
Max Reitz | d0bc9e5 | 2017-06-13 22:20:58 +0200 | [diff] [blame] | 2079 | |
Kevin Wolf | 29cb4c0 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2080 | return raw_thread_pool_submit(bs, handle_aiocb_truncate, &acb); |
Max Reitz | 9f63b07 | 2017-06-13 22:20:57 +0200 | [diff] [blame] | 2081 | } |
| 2082 | |
Kevin Wolf | 061ca8a | 2018-06-21 17:54:35 +0200 | [diff] [blame] | 2083 | static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset, |
Max Reitz | c80d8b0 | 2019-09-18 11:51:40 +0200 | [diff] [blame] | 2084 | bool exact, PreallocMode prealloc, |
Kevin Wolf | 92b9279 | 2020-04-24 14:54:39 +0200 | [diff] [blame] | 2085 | BdrvRequestFlags flags, Error **errp) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2086 | { |
| 2087 | BDRVRawState *s = bs->opaque; |
Christoph Hellwig | 55b949c | 2011-09-21 01:10:37 +0200 | [diff] [blame] | 2088 | struct stat st; |
Max Reitz | f59adb3 | 2017-03-28 22:51:29 +0200 | [diff] [blame] | 2089 | int ret; |
Christoph Hellwig | 55b949c | 2011-09-21 01:10:37 +0200 | [diff] [blame] | 2090 | |
| 2091 | if (fstat(s->fd, &st)) { |
Max Reitz | f59adb3 | 2017-03-28 22:51:29 +0200 | [diff] [blame] | 2092 | ret = -errno; |
| 2093 | error_setg_errno(errp, -ret, "Failed to fstat() the file"); |
| 2094 | return ret; |
Christoph Hellwig | 55b949c | 2011-09-21 01:10:37 +0200 | [diff] [blame] | 2095 | } |
| 2096 | |
| 2097 | if (S_ISREG(st.st_mode)) { |
Max Reitz | 82325ae | 2019-09-18 11:51:41 +0200 | [diff] [blame] | 2098 | /* Always resizes to the exact @offset */ |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2099 | return raw_regular_truncate(bs, s->fd, offset, prealloc, errp); |
Max Reitz | 35d7260 | 2017-06-13 22:20:59 +0200 | [diff] [blame] | 2100 | } |
| 2101 | |
| 2102 | if (prealloc != PREALLOC_MODE_OFF) { |
| 2103 | error_setg(errp, "Preallocation mode '%s' unsupported for this " |
Markus Armbruster | 977c736 | 2017-08-24 10:46:08 +0200 | [diff] [blame] | 2104 | "non-regular file", PreallocMode_str(prealloc)); |
Max Reitz | 35d7260 | 2017-06-13 22:20:59 +0200 | [diff] [blame] | 2105 | return -ENOTSUP; |
| 2106 | } |
| 2107 | |
| 2108 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
Max Reitz | 82325ae | 2019-09-18 11:51:41 +0200 | [diff] [blame] | 2109 | int64_t cur_length = raw_getlength(bs); |
| 2110 | |
| 2111 | if (offset != cur_length && exact) { |
| 2112 | error_setg(errp, "Cannot resize device files"); |
| 2113 | return -ENOTSUP; |
| 2114 | } else if (offset > cur_length) { |
Max Reitz | f59adb3 | 2017-03-28 22:51:29 +0200 | [diff] [blame] | 2115 | error_setg(errp, "Cannot grow device files"); |
| 2116 | return -EINVAL; |
| 2117 | } |
Christoph Hellwig | 55b949c | 2011-09-21 01:10:37 +0200 | [diff] [blame] | 2118 | } else { |
Max Reitz | f59adb3 | 2017-03-28 22:51:29 +0200 | [diff] [blame] | 2119 | error_setg(errp, "Resizing this file is not supported"); |
Christoph Hellwig | 55b949c | 2011-09-21 01:10:37 +0200 | [diff] [blame] | 2120 | return -ENOTSUP; |
| 2121 | } |
| 2122 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2123 | return 0; |
| 2124 | } |
| 2125 | |
blueswir1 | 128ab2f | 2008-08-15 18:33:42 +0000 | [diff] [blame] | 2126 | #ifdef __OpenBSD__ |
| 2127 | static int64_t raw_getlength(BlockDriverState *bs) |
| 2128 | { |
| 2129 | BDRVRawState *s = bs->opaque; |
| 2130 | int fd = s->fd; |
| 2131 | struct stat st; |
| 2132 | |
| 2133 | if (fstat(fd, &st)) |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2134 | return -errno; |
blueswir1 | 128ab2f | 2008-08-15 18:33:42 +0000 | [diff] [blame] | 2135 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
| 2136 | struct disklabel dl; |
| 2137 | |
| 2138 | if (ioctl(fd, DIOCGDINFO, &dl)) |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2139 | return -errno; |
blueswir1 | 128ab2f | 2008-08-15 18:33:42 +0000 | [diff] [blame] | 2140 | return (uint64_t)dl.d_secsize * |
| 2141 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
| 2142 | } else |
| 2143 | return st.st_size; |
| 2144 | } |
Christoph Egger | d1f6fd8 | 2011-05-23 14:31:17 +0200 | [diff] [blame] | 2145 | #elif defined(__NetBSD__) |
| 2146 | static int64_t raw_getlength(BlockDriverState *bs) |
| 2147 | { |
| 2148 | BDRVRawState *s = bs->opaque; |
| 2149 | int fd = s->fd; |
| 2150 | struct stat st; |
| 2151 | |
| 2152 | if (fstat(fd, &st)) |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2153 | return -errno; |
Christoph Egger | d1f6fd8 | 2011-05-23 14:31:17 +0200 | [diff] [blame] | 2154 | if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
| 2155 | struct dkwedge_info dkw; |
| 2156 | |
| 2157 | if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) { |
| 2158 | return dkw.dkw_size * 512; |
| 2159 | } else { |
| 2160 | struct disklabel dl; |
| 2161 | |
| 2162 | if (ioctl(fd, DIOCGDINFO, &dl)) |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2163 | return -errno; |
Christoph Egger | d1f6fd8 | 2011-05-23 14:31:17 +0200 | [diff] [blame] | 2164 | return (uint64_t)dl.d_secsize * |
| 2165 | dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
| 2166 | } |
| 2167 | } else |
| 2168 | return st.st_size; |
| 2169 | } |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2170 | #elif defined(__sun__) |
| 2171 | static int64_t raw_getlength(BlockDriverState *bs) |
| 2172 | { |
| 2173 | BDRVRawState *s = bs->opaque; |
| 2174 | struct dk_minfo minfo; |
| 2175 | int ret; |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2176 | int64_t size; |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2177 | |
| 2178 | ret = fd_open(bs); |
| 2179 | if (ret < 0) { |
| 2180 | return ret; |
| 2181 | } |
| 2182 | |
| 2183 | /* |
| 2184 | * Use the DKIOCGMEDIAINFO ioctl to read the size. |
| 2185 | */ |
| 2186 | ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo); |
| 2187 | if (ret != -1) { |
| 2188 | return minfo.dki_lbsize * minfo.dki_capacity; |
| 2189 | } |
| 2190 | |
| 2191 | /* |
| 2192 | * There are reports that lseek on some devices fails, but |
| 2193 | * irc discussion said that contingency on contingency was overkill. |
| 2194 | */ |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2195 | size = lseek(s->fd, 0, SEEK_END); |
| 2196 | if (size < 0) { |
| 2197 | return -errno; |
| 2198 | } |
| 2199 | return size; |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2200 | } |
| 2201 | #elif defined(CONFIG_BSD) |
| 2202 | static int64_t raw_getlength(BlockDriverState *bs) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2203 | { |
| 2204 | BDRVRawState *s = bs->opaque; |
| 2205 | int fd = s->fd; |
| 2206 | int64_t size; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2207 | struct stat sb; |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 2208 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 2209 | int reopened = 0; |
| 2210 | #endif |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2211 | int ret; |
| 2212 | |
| 2213 | ret = fd_open(bs); |
| 2214 | if (ret < 0) |
| 2215 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2216 | |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 2217 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 2218 | again: |
| 2219 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2220 | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
| 2221 | #ifdef DIOCGMEDIASIZE |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 2222 | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) |
blueswir1 | c5e9723 | 2009-03-07 20:06:23 +0000 | [diff] [blame] | 2223 | #elif defined(DIOCGPART) |
| 2224 | { |
| 2225 | struct partinfo pi; |
| 2226 | if (ioctl(fd, DIOCGPART, &pi) == 0) |
| 2227 | size = pi.media_size; |
| 2228 | else |
| 2229 | size = 0; |
| 2230 | } |
| 2231 | if (size == 0) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2232 | #endif |
Pavel Borzenkov | 83affaa | 2011-11-10 22:40:06 +0400 | [diff] [blame] | 2233 | #if defined(__APPLE__) && defined(__MACH__) |
Programmingkid | 728dacb | 2015-01-19 17:12:55 -0500 | [diff] [blame] | 2234 | { |
| 2235 | uint64_t sectors = 0; |
| 2236 | uint32_t sector_size = 0; |
| 2237 | |
| 2238 | if (ioctl(fd, DKIOCGETBLOCKCOUNT, §ors) == 0 |
| 2239 | && ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) == 0) { |
| 2240 | size = sectors * sector_size; |
| 2241 | } else { |
| 2242 | size = lseek(fd, 0LL, SEEK_END); |
| 2243 | if (size < 0) { |
| 2244 | return -errno; |
| 2245 | } |
| 2246 | } |
| 2247 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2248 | #else |
| 2249 | size = lseek(fd, 0LL, SEEK_END); |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2250 | if (size < 0) { |
| 2251 | return -errno; |
| 2252 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2253 | #endif |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 2254 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 2255 | switch(s->type) { |
| 2256 | case FTYPE_CD: |
| 2257 | /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ |
| 2258 | if (size == 2048LL * (unsigned)-1) |
| 2259 | size = 0; |
| 2260 | /* XXX no disc? maybe we need to reopen... */ |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 2261 | if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 2262 | reopened = 1; |
| 2263 | goto again; |
| 2264 | } |
| 2265 | } |
| 2266 | #endif |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2267 | } else { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2268 | size = lseek(fd, 0, SEEK_END); |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2269 | if (size < 0) { |
| 2270 | return -errno; |
| 2271 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2272 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2273 | return size; |
| 2274 | } |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2275 | #else |
| 2276 | static int64_t raw_getlength(BlockDriverState *bs) |
| 2277 | { |
| 2278 | BDRVRawState *s = bs->opaque; |
| 2279 | int ret; |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2280 | int64_t size; |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2281 | |
| 2282 | ret = fd_open(bs); |
| 2283 | if (ret < 0) { |
| 2284 | return ret; |
| 2285 | } |
| 2286 | |
Markus Armbruster | aa72970 | 2014-06-26 13:23:16 +0200 | [diff] [blame] | 2287 | size = lseek(s->fd, 0, SEEK_END); |
| 2288 | if (size < 0) { |
| 2289 | return -errno; |
| 2290 | } |
| 2291 | return size; |
Christoph Hellwig | 50779cc | 2010-04-06 19:13:44 +0200 | [diff] [blame] | 2292 | } |
blueswir1 | 128ab2f | 2008-08-15 18:33:42 +0000 | [diff] [blame] | 2293 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2294 | |
Fam Zheng | 4a1d5e1 | 2011-07-12 19:56:39 +0800 | [diff] [blame] | 2295 | static int64_t raw_get_allocated_file_size(BlockDriverState *bs) |
| 2296 | { |
| 2297 | struct stat st; |
| 2298 | BDRVRawState *s = bs->opaque; |
| 2299 | |
| 2300 | if (fstat(s->fd, &st) < 0) { |
| 2301 | return -errno; |
| 2302 | } |
| 2303 | return (int64_t)st.st_blocks * 512; |
| 2304 | } |
| 2305 | |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2306 | static int coroutine_fn |
| 2307 | raw_co_create(BlockdevCreateOptions *options, Error **errp) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2308 | { |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2309 | BlockdevCreateOptionsFile *file_opts; |
Max Reitz | 7c20c80 | 2018-07-04 16:47:51 +0200 | [diff] [blame] | 2310 | Error *local_err = NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2311 | int fd; |
Max Reitz | d815efc | 2018-07-04 16:47:50 +0200 | [diff] [blame] | 2312 | uint64_t perm, shared; |
Stefan Weil | 1e37d05 | 2009-07-11 16:43:37 +0200 | [diff] [blame] | 2313 | int result = 0; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2314 | |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2315 | /* Validate options and set default values */ |
| 2316 | assert(options->driver == BLOCKDEV_DRIVER_FILE); |
| 2317 | file_opts = &options->u.file; |
Max Reitz | 464d9f6 | 2014-03-05 22:41:38 +0100 | [diff] [blame] | 2318 | |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2319 | if (!file_opts->has_nocow) { |
| 2320 | file_opts->nocow = false; |
| 2321 | } |
| 2322 | if (!file_opts->has_preallocation) { |
| 2323 | file_opts->preallocation = PREALLOC_MODE_OFF; |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2324 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2325 | |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2326 | /* Create file */ |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2327 | fd = qemu_open(file_opts->filename, O_RDWR | O_CREAT | O_BINARY, 0644); |
Stefan Weil | 1e37d05 | 2009-07-11 16:43:37 +0200 | [diff] [blame] | 2328 | if (fd < 0) { |
| 2329 | result = -errno; |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 2330 | error_setg_errno(errp, -result, "Could not create file"); |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2331 | goto out; |
Stefan Weil | 1e37d05 | 2009-07-11 16:43:37 +0200 | [diff] [blame] | 2332 | } |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2333 | |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2334 | /* Take permissions: We want to discard everything, so we need |
| 2335 | * BLK_PERM_WRITE; and truncation to the desired size requires |
| 2336 | * BLK_PERM_RESIZE. |
| 2337 | * On the other hand, we cannot share the RESIZE permission |
| 2338 | * because we promise that after this function, the file has the |
| 2339 | * size given in the options. If someone else were to resize it |
| 2340 | * concurrently, we could not guarantee that. |
| 2341 | * Note that after this function, we can no longer guarantee that |
| 2342 | * the file is not touched by a third party, so it may be resized |
| 2343 | * then. */ |
| 2344 | perm = BLK_PERM_WRITE | BLK_PERM_RESIZE; |
| 2345 | shared = BLK_PERM_ALL & ~BLK_PERM_RESIZE; |
| 2346 | |
| 2347 | /* Step one: Take locks */ |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 2348 | result = raw_apply_lock_bytes(NULL, fd, perm, ~shared, false, errp); |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2349 | if (result < 0) { |
| 2350 | goto out_close; |
| 2351 | } |
| 2352 | |
| 2353 | /* Step two: Check that nobody else has taken conflicting locks */ |
| 2354 | result = raw_check_lock_bytes(fd, perm, shared, errp); |
| 2355 | if (result < 0) { |
Fam Zheng | b857431 | 2018-09-25 13:05:01 +0800 | [diff] [blame] | 2356 | error_append_hint(errp, |
| 2357 | "Is another process using the image [%s]?\n", |
| 2358 | file_opts->filename); |
Max Reitz | 7c20c80 | 2018-07-04 16:47:51 +0200 | [diff] [blame] | 2359 | goto out_unlock; |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2360 | } |
| 2361 | |
| 2362 | /* Clear the file by truncating it to 0 */ |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2363 | result = raw_regular_truncate(NULL, fd, 0, PREALLOC_MODE_OFF, errp); |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2364 | if (result < 0) { |
Max Reitz | 7c20c80 | 2018-07-04 16:47:51 +0200 | [diff] [blame] | 2365 | goto out_unlock; |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2366 | } |
| 2367 | |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2368 | if (file_opts->nocow) { |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2369 | #ifdef __linux__ |
| 2370 | /* Set NOCOW flag to solve performance issue on fs like btrfs. |
| 2371 | * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value |
| 2372 | * will be ignored since any failure of this operation should not |
| 2373 | * block the left work. |
| 2374 | */ |
| 2375 | int attr; |
| 2376 | if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) { |
| 2377 | attr |= FS_NOCOW_FL; |
| 2378 | ioctl(fd, FS_IOC_SETFLAGS, &attr); |
| 2379 | } |
| 2380 | #endif |
| 2381 | } |
| 2382 | |
Max Reitz | b8cf191 | 2018-05-09 23:53:35 +0200 | [diff] [blame] | 2383 | /* Resize and potentially preallocate the file to the desired |
| 2384 | * final size */ |
Kevin Wolf | 93f4e2f | 2018-06-21 18:23:16 +0200 | [diff] [blame] | 2385 | result = raw_regular_truncate(NULL, fd, file_opts->size, |
| 2386 | file_opts->preallocation, errp); |
Max Reitz | 9f63b07 | 2017-06-13 22:20:57 +0200 | [diff] [blame] | 2387 | if (result < 0) { |
Max Reitz | 7c20c80 | 2018-07-04 16:47:51 +0200 | [diff] [blame] | 2388 | goto out_unlock; |
| 2389 | } |
| 2390 | |
| 2391 | out_unlock: |
Fam Zheng | 2996ffa | 2018-10-11 15:21:33 +0800 | [diff] [blame] | 2392 | raw_apply_lock_bytes(NULL, fd, 0, 0, true, &local_err); |
Max Reitz | 7c20c80 | 2018-07-04 16:47:51 +0200 | [diff] [blame] | 2393 | if (local_err) { |
| 2394 | /* The above call should not fail, and if it does, that does |
| 2395 | * not mean the whole creation operation has failed. So |
| 2396 | * report it the user for their convenience, but do not report |
| 2397 | * it to the caller. */ |
Fam Zheng | db0754d | 2018-11-01 14:29:09 +0800 | [diff] [blame] | 2398 | warn_report_err(local_err); |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2399 | } |
| 2400 | |
Nir Soffer | 5a1dad9 | 2017-02-17 02:51:26 +0200 | [diff] [blame] | 2401 | out_close: |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2402 | if (qemu_close(fd) != 0 && result == 0) { |
| 2403 | result = -errno; |
| 2404 | error_setg_errno(errp, -result, "Could not close the new file"); |
| 2405 | } |
| 2406 | out: |
Stefan Weil | 1e37d05 | 2009-07-11 16:43:37 +0200 | [diff] [blame] | 2407 | return result; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2408 | } |
| 2409 | |
Maxim Levitsky | b92902d | 2020-03-26 03:12:17 +0200 | [diff] [blame] | 2410 | static int coroutine_fn raw_co_create_opts(BlockDriver *drv, |
| 2411 | const char *filename, |
| 2412 | QemuOpts *opts, |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 2413 | Error **errp) |
| 2414 | { |
| 2415 | BlockdevCreateOptions options; |
| 2416 | int64_t total_size = 0; |
| 2417 | bool nocow = false; |
| 2418 | PreallocMode prealloc; |
| 2419 | char *buf = NULL; |
| 2420 | Error *local_err = NULL; |
| 2421 | |
| 2422 | /* Skip file: protocol prefix */ |
| 2423 | strstart(filename, "file:", &filename); |
| 2424 | |
| 2425 | /* Read out options */ |
| 2426 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
| 2427 | BDRV_SECTOR_SIZE); |
| 2428 | nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false); |
| 2429 | buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); |
| 2430 | prealloc = qapi_enum_parse(&PreallocMode_lookup, buf, |
| 2431 | PREALLOC_MODE_OFF, &local_err); |
| 2432 | g_free(buf); |
| 2433 | if (local_err) { |
| 2434 | error_propagate(errp, local_err); |
| 2435 | return -EINVAL; |
| 2436 | } |
| 2437 | |
| 2438 | options = (BlockdevCreateOptions) { |
| 2439 | .driver = BLOCKDEV_DRIVER_FILE, |
| 2440 | .u.file = { |
| 2441 | .filename = (char *) filename, |
| 2442 | .size = total_size, |
| 2443 | .has_preallocation = true, |
| 2444 | .preallocation = prealloc, |
| 2445 | .has_nocow = true, |
| 2446 | .nocow = nocow, |
| 2447 | }, |
| 2448 | }; |
| 2449 | return raw_co_create(&options, errp); |
| 2450 | } |
| 2451 | |
Daniel Henrique Barboza | 9bffae1 | 2020-01-30 18:39:04 -0300 | [diff] [blame] | 2452 | static int coroutine_fn raw_co_delete_file(BlockDriverState *bs, |
| 2453 | Error **errp) |
| 2454 | { |
| 2455 | struct stat st; |
| 2456 | int ret; |
| 2457 | |
| 2458 | if (!(stat(bs->filename, &st) == 0) || !S_ISREG(st.st_mode)) { |
| 2459 | error_setg_errno(errp, ENOENT, "%s is not a regular file", |
| 2460 | bs->filename); |
| 2461 | return -ENOENT; |
| 2462 | } |
| 2463 | |
| 2464 | ret = unlink(bs->filename); |
| 2465 | if (ret < 0) { |
| 2466 | ret = -errno; |
| 2467 | error_setg_errno(errp, -ret, "Error when deleting file %s", |
| 2468 | bs->filename); |
| 2469 | } |
| 2470 | |
| 2471 | return ret; |
| 2472 | } |
| 2473 | |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2474 | /* |
| 2475 | * Find allocation range in @bs around offset @start. |
| 2476 | * May change underlying file descriptor's file offset. |
| 2477 | * If @start is not in a hole, store @start in @data, and the |
| 2478 | * beginning of the next hole in @hole, and return 0. |
| 2479 | * If @start is in a non-trailing hole, store @start in @hole and the |
| 2480 | * beginning of the next non-hole in @data, and return 0. |
| 2481 | * If @start is in a trailing hole or beyond EOF, return -ENXIO. |
| 2482 | * If we can't find out, return a negative errno other than -ENXIO. |
| 2483 | */ |
| 2484 | static int find_allocation(BlockDriverState *bs, off_t start, |
| 2485 | off_t *data, off_t *hole) |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2486 | { |
| 2487 | #if defined SEEK_HOLE && defined SEEK_DATA |
| 2488 | BDRVRawState *s = bs->opaque; |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2489 | off_t offs; |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2490 | |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2491 | /* |
| 2492 | * SEEK_DATA cases: |
| 2493 | * D1. offs == start: start is in data |
| 2494 | * D2. offs > start: start is in a hole, next data at offs |
| 2495 | * D3. offs < 0, errno = ENXIO: either start is in a trailing hole |
| 2496 | * or start is beyond EOF |
| 2497 | * If the latter happens, the file has been truncated behind |
| 2498 | * our back since we opened it. All bets are off then. |
| 2499 | * Treating like a trailing hole is simplest. |
| 2500 | * D4. offs < 0, errno != ENXIO: we learned nothing |
| 2501 | */ |
| 2502 | offs = lseek(s->fd, start, SEEK_DATA); |
| 2503 | if (offs < 0) { |
| 2504 | return -errno; /* D3 or D4 */ |
| 2505 | } |
Jeff Cody | a03083a | 2018-04-03 00:37:26 -0400 | [diff] [blame] | 2506 | |
| 2507 | if (offs < start) { |
| 2508 | /* This is not a valid return by lseek(). We are safe to just return |
| 2509 | * -EIO in this case, and we'll treat it like D4. */ |
| 2510 | return -EIO; |
| 2511 | } |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2512 | |
| 2513 | if (offs > start) { |
| 2514 | /* D2: in hole, next data at offs */ |
| 2515 | *hole = start; |
| 2516 | *data = offs; |
| 2517 | return 0; |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2518 | } |
| 2519 | |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2520 | /* D1: in data, end not yet known */ |
| 2521 | |
| 2522 | /* |
| 2523 | * SEEK_HOLE cases: |
| 2524 | * H1. offs == start: start is in a hole |
| 2525 | * If this happens here, a hole has been dug behind our back |
| 2526 | * since the previous lseek(). |
| 2527 | * H2. offs > start: either start is in data, next hole at offs, |
| 2528 | * or start is in trailing hole, EOF at offs |
| 2529 | * Linux treats trailing holes like any other hole: offs == |
| 2530 | * start. Solaris seeks to EOF instead: offs > start (blech). |
| 2531 | * If that happens here, a hole has been dug behind our back |
| 2532 | * since the previous lseek(). |
| 2533 | * H3. offs < 0, errno = ENXIO: start is beyond EOF |
| 2534 | * If this happens, the file has been truncated behind our |
| 2535 | * back since we opened it. Treat it like a trailing hole. |
| 2536 | * H4. offs < 0, errno != ENXIO: we learned nothing |
| 2537 | * Pretend we know nothing at all, i.e. "forget" about D1. |
| 2538 | */ |
| 2539 | offs = lseek(s->fd, start, SEEK_HOLE); |
| 2540 | if (offs < 0) { |
| 2541 | return -errno; /* D1 and (H3 or H4) */ |
| 2542 | } |
Jeff Cody | a03083a | 2018-04-03 00:37:26 -0400 | [diff] [blame] | 2543 | |
| 2544 | if (offs < start) { |
| 2545 | /* This is not a valid return by lseek(). We are safe to just return |
| 2546 | * -EIO in this case, and we'll treat it like H4. */ |
| 2547 | return -EIO; |
| 2548 | } |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2549 | |
| 2550 | if (offs > start) { |
| 2551 | /* |
| 2552 | * D1 and H2: either in data, next hole at offs, or it was in |
| 2553 | * data but is now in a trailing hole. In the latter case, |
| 2554 | * all bets are off. Treating it as if it there was data all |
| 2555 | * the way to EOF is safe, so simply do that. |
| 2556 | */ |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2557 | *data = start; |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2558 | *hole = offs; |
| 2559 | return 0; |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2560 | } |
| 2561 | |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2562 | /* D1 and H1 */ |
| 2563 | return -EBUSY; |
Max Reitz | 4f11aa8 | 2014-05-08 20:57:55 +0200 | [diff] [blame] | 2564 | #else |
| 2565 | return -ENOTSUP; |
| 2566 | #endif |
| 2567 | } |
| 2568 | |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2569 | /* |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2570 | * Returns the allocation status of the specified offset. |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2571 | * |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2572 | * The block layer guarantees 'offset' and 'bytes' are within bounds. |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2573 | * |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2574 | * 'pnum' is set to the number of bytes (including and immediately following |
| 2575 | * the specified offset) that are known to be in the same |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2576 | * allocated/unallocated state. |
| 2577 | * |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2578 | * 'bytes' is the max value 'pnum' should be set to. |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2579 | */ |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2580 | static int coroutine_fn raw_co_block_status(BlockDriverState *bs, |
| 2581 | bool want_zero, |
| 2582 | int64_t offset, |
| 2583 | int64_t bytes, int64_t *pnum, |
| 2584 | int64_t *map, |
| 2585 | BlockDriverState **file) |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2586 | { |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2587 | off_t data = 0, hole = 0; |
Max Reitz | d7f6275 | 2014-10-24 12:57:59 +0200 | [diff] [blame] | 2588 | int ret; |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2589 | |
Max Reitz | 9c3db31 | 2019-05-15 06:15:40 +0200 | [diff] [blame] | 2590 | assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); |
| 2591 | |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2592 | ret = fd_open(bs); |
| 2593 | if (ret < 0) { |
| 2594 | return ret; |
| 2595 | } |
| 2596 | |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2597 | if (!want_zero) { |
| 2598 | *pnum = bytes; |
| 2599 | *map = offset; |
| 2600 | *file = bs; |
| 2601 | return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; |
Max Reitz | e6d7ec3 | 2014-10-24 12:57:58 +0200 | [diff] [blame] | 2602 | } |
Kevin Wolf | 94282e7 | 2012-06-19 22:02:51 +0000 | [diff] [blame] | 2603 | |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2604 | ret = find_allocation(bs, offset, &data, &hole); |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2605 | if (ret == -ENXIO) { |
| 2606 | /* Trailing hole */ |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2607 | *pnum = bytes; |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2608 | ret = BDRV_BLOCK_ZERO; |
| 2609 | } else if (ret < 0) { |
| 2610 | /* No info available, so pretend there are no holes */ |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2611 | *pnum = bytes; |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2612 | ret = BDRV_BLOCK_DATA; |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2613 | } else if (data == offset) { |
| 2614 | /* On a data extent, compute bytes to the end of the extent, |
Kevin Wolf | f4a769a | 2015-06-09 10:55:08 +0200 | [diff] [blame] | 2615 | * possibly including a partial sector at EOF. */ |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2616 | *pnum = MIN(bytes, hole - offset); |
Max Reitz | 9c3db31 | 2019-05-15 06:15:40 +0200 | [diff] [blame] | 2617 | |
| 2618 | /* |
| 2619 | * We are not allowed to return partial sectors, though, so |
| 2620 | * round up if necessary. |
| 2621 | */ |
| 2622 | if (!QEMU_IS_ALIGNED(*pnum, bs->bl.request_alignment)) { |
| 2623 | int64_t file_length = raw_getlength(bs); |
| 2624 | if (file_length > 0) { |
| 2625 | /* Ignore errors, this is just a safeguard */ |
| 2626 | assert(hole == file_length); |
| 2627 | } |
| 2628 | *pnum = ROUND_UP(*pnum, bs->bl.request_alignment); |
| 2629 | } |
| 2630 | |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2631 | ret = BDRV_BLOCK_DATA; |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2632 | } else { |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2633 | /* On a hole, compute bytes to the beginning of the next extent. */ |
| 2634 | assert(hole == offset); |
| 2635 | *pnum = MIN(bytes, data - offset); |
Markus Armbruster | d1f06fe | 2014-11-17 11:18:34 +0100 | [diff] [blame] | 2636 | ret = BDRV_BLOCK_ZERO; |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2637 | } |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2638 | *map = offset; |
Fam Zheng | 02650ac | 2016-01-26 11:58:51 +0800 | [diff] [blame] | 2639 | *file = bs; |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 2640 | return ret | BDRV_BLOCK_OFFSET_VALID; |
Paolo Bonzini | 5500316 | 2012-05-09 16:49:58 +0200 | [diff] [blame] | 2641 | } |
| 2642 | |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 2643 | #if defined(__linux__) |
| 2644 | /* Verify that the file is not in the page cache */ |
| 2645 | static void check_cache_dropped(BlockDriverState *bs, Error **errp) |
| 2646 | { |
| 2647 | const size_t window_size = 128 * 1024 * 1024; |
| 2648 | BDRVRawState *s = bs->opaque; |
| 2649 | void *window = NULL; |
| 2650 | size_t length = 0; |
| 2651 | unsigned char *vec; |
| 2652 | size_t page_size; |
| 2653 | off_t offset; |
| 2654 | off_t end; |
| 2655 | |
| 2656 | /* mincore(2) page status information requires 1 byte per page */ |
| 2657 | page_size = sysconf(_SC_PAGESIZE); |
| 2658 | vec = g_malloc(DIV_ROUND_UP(window_size, page_size)); |
| 2659 | |
| 2660 | end = raw_getlength(bs); |
| 2661 | |
| 2662 | for (offset = 0; offset < end; offset += window_size) { |
| 2663 | void *new_window; |
| 2664 | size_t new_length; |
| 2665 | size_t vec_end; |
| 2666 | size_t i; |
| 2667 | int ret; |
| 2668 | |
| 2669 | /* Unmap previous window if size has changed */ |
| 2670 | new_length = MIN(end - offset, window_size); |
| 2671 | if (new_length != length) { |
| 2672 | munmap(window, length); |
| 2673 | window = NULL; |
| 2674 | length = 0; |
| 2675 | } |
| 2676 | |
| 2677 | new_window = mmap(window, new_length, PROT_NONE, MAP_PRIVATE, |
| 2678 | s->fd, offset); |
| 2679 | if (new_window == MAP_FAILED) { |
| 2680 | error_setg_errno(errp, errno, "mmap failed"); |
| 2681 | break; |
| 2682 | } |
| 2683 | |
| 2684 | window = new_window; |
| 2685 | length = new_length; |
| 2686 | |
| 2687 | ret = mincore(window, length, vec); |
| 2688 | if (ret < 0) { |
| 2689 | error_setg_errno(errp, errno, "mincore failed"); |
| 2690 | break; |
| 2691 | } |
| 2692 | |
| 2693 | vec_end = DIV_ROUND_UP(length, page_size); |
| 2694 | for (i = 0; i < vec_end; i++) { |
| 2695 | if (vec[i] & 0x1) { |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 2696 | break; |
| 2697 | } |
| 2698 | } |
Markus Armbruster | 77ed971 | 2020-04-22 15:07:07 +0200 | [diff] [blame] | 2699 | if (i < vec_end) { |
| 2700 | error_setg(errp, "page cache still in use!"); |
| 2701 | break; |
| 2702 | } |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 2703 | } |
| 2704 | |
| 2705 | if (window) { |
| 2706 | munmap(window, length); |
| 2707 | } |
| 2708 | |
| 2709 | g_free(vec); |
| 2710 | } |
| 2711 | #endif /* __linux__ */ |
| 2712 | |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 2713 | static void coroutine_fn raw_co_invalidate_cache(BlockDriverState *bs, |
| 2714 | Error **errp) |
| 2715 | { |
| 2716 | BDRVRawState *s = bs->opaque; |
| 2717 | int ret; |
| 2718 | |
| 2719 | ret = fd_open(bs); |
| 2720 | if (ret < 0) { |
| 2721 | error_setg_errno(errp, -ret, "The file descriptor is not open"); |
| 2722 | return; |
| 2723 | } |
| 2724 | |
Stefan Hajnoczi | f357fcd | 2019-03-07 16:49:41 +0000 | [diff] [blame] | 2725 | if (!s->drop_cache) { |
| 2726 | return; |
| 2727 | } |
| 2728 | |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 2729 | if (s->open_flags & O_DIRECT) { |
| 2730 | return; /* No host kernel page cache */ |
| 2731 | } |
| 2732 | |
| 2733 | #if defined(__linux__) |
| 2734 | /* This sets the scene for the next syscall... */ |
| 2735 | ret = bdrv_co_flush(bs); |
| 2736 | if (ret < 0) { |
| 2737 | error_setg_errno(errp, -ret, "flush failed"); |
| 2738 | return; |
| 2739 | } |
| 2740 | |
| 2741 | /* Linux does not invalidate pages that are dirty, locked, or mmapped by a |
| 2742 | * process. These limitations are okay because we just fsynced the file, |
| 2743 | * we don't use mmap, and the file should not be in use by other processes. |
| 2744 | */ |
| 2745 | ret = posix_fadvise(s->fd, 0, 0, POSIX_FADV_DONTNEED); |
| 2746 | if (ret != 0) { /* the return value is a positive errno */ |
| 2747 | error_setg_errno(errp, ret, "fadvise failed"); |
| 2748 | return; |
| 2749 | } |
Stefan Hajnoczi | 31be8a2 | 2018-04-27 17:23:12 +0100 | [diff] [blame] | 2750 | |
| 2751 | if (s->check_cache_dropped) { |
| 2752 | check_cache_dropped(bs, errp); |
| 2753 | } |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 2754 | #else /* __linux__ */ |
| 2755 | /* Do nothing. Live migration to a remote host with cache.direct=off is |
| 2756 | * unsupported on other host operating systems. Cache consistency issues |
| 2757 | * may occur but no error is reported here, partly because that's the |
| 2758 | * historical behavior and partly because it's hard to differentiate valid |
| 2759 | * configurations that should not cause errors. |
| 2760 | */ |
| 2761 | #endif /* !__linux__ */ |
| 2762 | } |
| 2763 | |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 2764 | static void raw_account_discard(BDRVRawState *s, uint64_t nbytes, int ret) |
| 2765 | { |
| 2766 | if (ret) { |
| 2767 | s->stats.discard_nb_failed++; |
| 2768 | } else { |
| 2769 | s->stats.discard_nb_ok++; |
| 2770 | s->stats.discard_bytes_ok += nbytes; |
| 2771 | } |
| 2772 | } |
| 2773 | |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 2774 | static coroutine_fn int |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2775 | raw_do_pdiscard(BlockDriverState *bs, int64_t offset, int bytes, bool blkdev) |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 2776 | { |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 2777 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2778 | RawPosixAIOData acb; |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 2779 | int ret; |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 2780 | |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2781 | acb = (RawPosixAIOData) { |
| 2782 | .bs = bs, |
| 2783 | .aio_fildes = s->fd, |
| 2784 | .aio_type = QEMU_AIO_DISCARD, |
| 2785 | .aio_offset = offset, |
| 2786 | .aio_nbytes = bytes, |
| 2787 | }; |
| 2788 | |
| 2789 | if (blkdev) { |
| 2790 | acb.aio_type |= QEMU_AIO_BLKDEV; |
| 2791 | } |
| 2792 | |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 2793 | ret = raw_thread_pool_submit(bs, handle_aiocb_discard, &acb); |
| 2794 | raw_account_discard(s, bytes, ret); |
| 2795 | return ret; |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2796 | } |
| 2797 | |
| 2798 | static coroutine_fn int |
| 2799 | raw_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) |
| 2800 | { |
| 2801 | return raw_do_pdiscard(bs, offset, bytes, false); |
Christoph Hellwig | dce512d | 2010-12-17 11:41:15 +0100 | [diff] [blame] | 2802 | } |
Kevin Wolf | 0e7e198 | 2009-05-18 16:42:10 +0200 | [diff] [blame] | 2803 | |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2804 | static int coroutine_fn |
| 2805 | raw_do_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int bytes, |
| 2806 | BdrvRequestFlags flags, bool blkdev) |
| 2807 | { |
| 2808 | BDRVRawState *s = bs->opaque; |
| 2809 | RawPosixAIOData acb; |
| 2810 | ThreadPoolFunc *handler; |
| 2811 | |
Max Reitz | 292d06b | 2019-11-01 16:25:10 +0100 | [diff] [blame] | 2812 | #ifdef CONFIG_FALLOCATE |
| 2813 | if (offset + bytes > bs->total_sectors * BDRV_SECTOR_SIZE) { |
| 2814 | BdrvTrackedRequest *req; |
| 2815 | uint64_t end; |
| 2816 | |
| 2817 | /* |
| 2818 | * This is a workaround for a bug in the Linux XFS driver, |
| 2819 | * where writes submitted through the AIO interface will be |
| 2820 | * discarded if they happen beyond a concurrently running |
| 2821 | * fallocate() that increases the file length (i.e., both the |
| 2822 | * write and the fallocate() happen beyond the EOF). |
| 2823 | * |
| 2824 | * To work around it, we extend the tracked request for this |
| 2825 | * zero write until INT64_MAX (effectively infinity), and mark |
| 2826 | * it as serializing. |
| 2827 | * |
| 2828 | * We have to enable this workaround for all filesystems and |
| 2829 | * AIO modes (not just XFS with aio=native), because for |
| 2830 | * remote filesystems we do not know the host configuration. |
| 2831 | */ |
| 2832 | |
| 2833 | req = bdrv_co_get_self_request(bs); |
| 2834 | assert(req); |
| 2835 | assert(req->type == BDRV_TRACKED_WRITE); |
| 2836 | assert(req->offset <= offset); |
| 2837 | assert(req->offset + req->bytes >= offset + bytes); |
| 2838 | |
| 2839 | end = INT64_MAX & -(uint64_t)bs->bl.request_alignment; |
| 2840 | req->bytes = end - req->offset; |
| 2841 | req->overlap_bytes = req->bytes; |
| 2842 | |
| 2843 | bdrv_mark_request_serialising(req, bs->bl.request_alignment); |
Max Reitz | 292d06b | 2019-11-01 16:25:10 +0100 | [diff] [blame] | 2844 | } |
| 2845 | #endif |
| 2846 | |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2847 | acb = (RawPosixAIOData) { |
| 2848 | .bs = bs, |
| 2849 | .aio_fildes = s->fd, |
| 2850 | .aio_type = QEMU_AIO_WRITE_ZEROES, |
| 2851 | .aio_offset = offset, |
| 2852 | .aio_nbytes = bytes, |
| 2853 | }; |
| 2854 | |
| 2855 | if (blkdev) { |
| 2856 | acb.aio_type |= QEMU_AIO_BLKDEV; |
| 2857 | } |
Kevin Wolf | 738301e | 2019-03-22 13:45:23 +0100 | [diff] [blame] | 2858 | if (flags & BDRV_REQ_NO_FALLBACK) { |
| 2859 | acb.aio_type |= QEMU_AIO_NO_FALLBACK; |
| 2860 | } |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2861 | |
| 2862 | if (flags & BDRV_REQ_MAY_UNMAP) { |
| 2863 | acb.aio_type |= QEMU_AIO_DISCARD; |
| 2864 | handler = handle_aiocb_write_zeroes_unmap; |
| 2865 | } else { |
| 2866 | handler = handle_aiocb_write_zeroes; |
| 2867 | } |
| 2868 | |
| 2869 | return raw_thread_pool_submit(bs, handler, &acb); |
| 2870 | } |
| 2871 | |
Eric Blake | 2ffa76c | 2016-06-01 15:10:10 -0600 | [diff] [blame] | 2872 | static int coroutine_fn raw_co_pwrite_zeroes( |
| 2873 | BlockDriverState *bs, int64_t offset, |
Manos Pitsidianakis | f5a5ca7 | 2017-06-09 13:18:08 +0300 | [diff] [blame] | 2874 | int bytes, BdrvRequestFlags flags) |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 2875 | { |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 2876 | return raw_do_pwrite_zeroes(bs, offset, bytes, flags, false); |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 2877 | } |
| 2878 | |
| 2879 | static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 2880 | { |
| 2881 | BDRVRawState *s = bs->opaque; |
| 2882 | |
| 2883 | bdi->unallocated_blocks_are_zero = s->discard_zeroes; |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 2884 | return 0; |
| 2885 | } |
| 2886 | |
Anton Nefedov | d924559 | 2019-09-23 15:17:37 +0300 | [diff] [blame] | 2887 | static BlockStatsSpecificFile get_blockstats_specific_file(BlockDriverState *bs) |
| 2888 | { |
| 2889 | BDRVRawState *s = bs->opaque; |
| 2890 | return (BlockStatsSpecificFile) { |
| 2891 | .discard_nb_ok = s->stats.discard_nb_ok, |
| 2892 | .discard_nb_failed = s->stats.discard_nb_failed, |
| 2893 | .discard_bytes_ok = s->stats.discard_bytes_ok, |
| 2894 | }; |
| 2895 | } |
| 2896 | |
| 2897 | static BlockStatsSpecific *raw_get_specific_stats(BlockDriverState *bs) |
| 2898 | { |
| 2899 | BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1); |
| 2900 | |
| 2901 | stats->driver = BLOCKDEV_DRIVER_FILE; |
| 2902 | stats->u.file = get_blockstats_specific_file(bs); |
| 2903 | |
| 2904 | return stats; |
| 2905 | } |
| 2906 | |
| 2907 | static BlockStatsSpecific *hdev_get_specific_stats(BlockDriverState *bs) |
| 2908 | { |
| 2909 | BlockStatsSpecific *stats = g_new(BlockStatsSpecific, 1); |
| 2910 | |
| 2911 | stats->driver = BLOCKDEV_DRIVER_HOST_DEVICE; |
| 2912 | stats->u.host_device = get_blockstats_specific_file(bs); |
| 2913 | |
| 2914 | return stats; |
| 2915 | } |
| 2916 | |
Chunyan Liu | 6f482f7 | 2014-06-05 17:21:01 +0800 | [diff] [blame] | 2917 | static QemuOptsList raw_create_opts = { |
| 2918 | .name = "raw-create-opts", |
| 2919 | .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head), |
| 2920 | .desc = { |
| 2921 | { |
| 2922 | .name = BLOCK_OPT_SIZE, |
| 2923 | .type = QEMU_OPT_SIZE, |
| 2924 | .help = "Virtual disk size" |
| 2925 | }, |
Chunyan Liu | 4ab1559 | 2014-06-30 14:29:58 +0800 | [diff] [blame] | 2926 | { |
| 2927 | .name = BLOCK_OPT_NOCOW, |
| 2928 | .type = QEMU_OPT_BOOL, |
| 2929 | .help = "Turn off copy-on-write (valid only on btrfs)" |
| 2930 | }, |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2931 | { |
| 2932 | .name = BLOCK_OPT_PREALLOC, |
| 2933 | .type = QEMU_OPT_STRING, |
Stefano Garzarella | abea005 | 2019-05-24 09:58:47 +0200 | [diff] [blame] | 2934 | .help = "Preallocation mode (allowed values: off" |
| 2935 | #ifdef CONFIG_POSIX_FALLOCATE |
| 2936 | ", falloc" |
| 2937 | #endif |
| 2938 | ", full)" |
Hu Tao | 0624742 | 2014-09-10 17:05:48 +0800 | [diff] [blame] | 2939 | }, |
Chunyan Liu | 6f482f7 | 2014-06-05 17:21:01 +0800 | [diff] [blame] | 2940 | { /* end of list */ } |
| 2941 | } |
Kevin Wolf | 0e7e198 | 2009-05-18 16:42:10 +0200 | [diff] [blame] | 2942 | }; |
| 2943 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 2944 | static int raw_check_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared, |
| 2945 | Error **errp) |
| 2946 | { |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 2947 | BDRVRawState *s = bs->opaque; |
| 2948 | BDRVRawReopenState *rs = NULL; |
| 2949 | int open_flags; |
| 2950 | int ret; |
| 2951 | |
| 2952 | if (s->perm_change_fd) { |
| 2953 | /* |
| 2954 | * In the context of reopen, this function may be called several times |
| 2955 | * (directly and recursively while change permissions of the parent). |
| 2956 | * This is even true for children that don't inherit from the original |
| 2957 | * reopen node, so s->reopen_state is not set. |
| 2958 | * |
| 2959 | * Ignore all but the first call. |
| 2960 | */ |
| 2961 | return 0; |
| 2962 | } |
| 2963 | |
| 2964 | if (s->reopen_state) { |
| 2965 | /* We already have a new file descriptor to set permissions for */ |
| 2966 | assert(s->reopen_state->perm == perm); |
| 2967 | assert(s->reopen_state->shared_perm == shared); |
| 2968 | rs = s->reopen_state->opaque; |
| 2969 | s->perm_change_fd = rs->fd; |
Max Reitz | 094e363 | 2019-05-22 19:03:45 +0200 | [diff] [blame] | 2970 | s->perm_change_flags = rs->open_flags; |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 2971 | } else { |
| 2972 | /* We may need a new fd if auto-read-only switches the mode */ |
Kevin Wolf | 23dece1 | 2019-03-01 22:15:11 +0100 | [diff] [blame] | 2973 | ret = raw_reconfigure_getfd(bs, bs->open_flags, &open_flags, perm, |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 2974 | false, errp); |
| 2975 | if (ret < 0) { |
| 2976 | return ret; |
| 2977 | } else if (ret != s->fd) { |
| 2978 | s->perm_change_fd = ret; |
Max Reitz | 094e363 | 2019-05-22 19:03:45 +0200 | [diff] [blame] | 2979 | s->perm_change_flags = open_flags; |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 2980 | } |
| 2981 | } |
| 2982 | |
| 2983 | /* Prepare permissions on old fd to avoid conflicts between old and new, |
| 2984 | * but keep everything locked that new will need. */ |
| 2985 | ret = raw_handle_perm_lock(bs, RAW_PL_PREPARE, perm, shared, errp); |
| 2986 | if (ret < 0) { |
| 2987 | goto fail; |
| 2988 | } |
| 2989 | |
| 2990 | /* Copy locks to the new fd */ |
| 2991 | if (s->perm_change_fd) { |
| 2992 | ret = raw_apply_lock_bytes(NULL, s->perm_change_fd, perm, ~shared, |
| 2993 | false, errp); |
| 2994 | if (ret < 0) { |
| 2995 | raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); |
| 2996 | goto fail; |
| 2997 | } |
| 2998 | } |
| 2999 | return 0; |
| 3000 | |
| 3001 | fail: |
| 3002 | if (s->perm_change_fd && !s->reopen_state) { |
| 3003 | qemu_close(s->perm_change_fd); |
| 3004 | } |
| 3005 | s->perm_change_fd = 0; |
| 3006 | return ret; |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 3007 | } |
| 3008 | |
| 3009 | static void raw_set_perm(BlockDriverState *bs, uint64_t perm, uint64_t shared) |
| 3010 | { |
| 3011 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 3012 | |
| 3013 | /* For reopen, we have already switched to the new fd (.bdrv_set_perm is |
| 3014 | * called after .bdrv_reopen_commit) */ |
| 3015 | if (s->perm_change_fd && s->fd != s->perm_change_fd) { |
| 3016 | qemu_close(s->fd); |
| 3017 | s->fd = s->perm_change_fd; |
Max Reitz | 094e363 | 2019-05-22 19:03:45 +0200 | [diff] [blame] | 3018 | s->open_flags = s->perm_change_flags; |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 3019 | } |
| 3020 | s->perm_change_fd = 0; |
| 3021 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 3022 | raw_handle_perm_lock(bs, RAW_PL_COMMIT, perm, shared, NULL); |
| 3023 | s->perm = perm; |
| 3024 | s->shared_perm = shared; |
| 3025 | } |
| 3026 | |
| 3027 | static void raw_abort_perm_update(BlockDriverState *bs) |
| 3028 | { |
Kevin Wolf | 6ceabe6 | 2019-03-08 15:40:40 +0100 | [diff] [blame] | 3029 | BDRVRawState *s = bs->opaque; |
| 3030 | |
| 3031 | /* For reopen, .bdrv_reopen_abort is called afterwards and will close |
| 3032 | * the file descriptor. */ |
| 3033 | if (s->perm_change_fd && !s->reopen_state) { |
| 3034 | qemu_close(s->perm_change_fd); |
| 3035 | } |
| 3036 | s->perm_change_fd = 0; |
| 3037 | |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 3038 | raw_handle_perm_lock(bs, RAW_PL_ABORT, 0, 0, NULL); |
| 3039 | } |
| 3040 | |
Vladimir Sementsov-Ogievskiy | 67b51fb | 2018-07-09 19:37:17 +0300 | [diff] [blame] | 3041 | static int coroutine_fn raw_co_copy_range_from( |
| 3042 | BlockDriverState *bs, BdrvChild *src, uint64_t src_offset, |
| 3043 | BdrvChild *dst, uint64_t dst_offset, uint64_t bytes, |
| 3044 | BdrvRequestFlags read_flags, BdrvRequestFlags write_flags) |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3045 | { |
Vladimir Sementsov-Ogievskiy | 67b51fb | 2018-07-09 19:37:17 +0300 | [diff] [blame] | 3046 | return bdrv_co_copy_range_to(src, src_offset, dst, dst_offset, bytes, |
| 3047 | read_flags, write_flags); |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3048 | } |
| 3049 | |
| 3050 | static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs, |
Vladimir Sementsov-Ogievskiy | 67b51fb | 2018-07-09 19:37:17 +0300 | [diff] [blame] | 3051 | BdrvChild *src, |
| 3052 | uint64_t src_offset, |
| 3053 | BdrvChild *dst, |
| 3054 | uint64_t dst_offset, |
| 3055 | uint64_t bytes, |
| 3056 | BdrvRequestFlags read_flags, |
| 3057 | BdrvRequestFlags write_flags) |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3058 | { |
Kevin Wolf | 58a209c | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 3059 | RawPosixAIOData acb; |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3060 | BDRVRawState *s = bs->opaque; |
| 3061 | BDRVRawState *src_s; |
| 3062 | |
| 3063 | assert(dst->bs == bs); |
| 3064 | if (src->bs->drv->bdrv_co_copy_range_to != raw_co_copy_range_to) { |
| 3065 | return -ENOTSUP; |
| 3066 | } |
| 3067 | |
| 3068 | src_s = src->bs->opaque; |
Fam Zheng | 9f850f6 | 2018-07-02 10:58:34 +0800 | [diff] [blame] | 3069 | if (fd_open(src->bs) < 0 || fd_open(dst->bs) < 0) { |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3070 | return -EIO; |
| 3071 | } |
Kevin Wolf | 58a209c | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 3072 | |
| 3073 | acb = (RawPosixAIOData) { |
| 3074 | .bs = bs, |
| 3075 | .aio_type = QEMU_AIO_COPY_RANGE, |
| 3076 | .aio_fildes = src_s->fd, |
| 3077 | .aio_offset = src_offset, |
| 3078 | .aio_nbytes = bytes, |
| 3079 | .copy_range = { |
| 3080 | .aio_fd2 = s->fd, |
| 3081 | .aio_offset2 = dst_offset, |
| 3082 | }, |
| 3083 | }; |
| 3084 | |
| 3085 | return raw_thread_pool_submit(bs, handle_aiocb_copy_range, &acb); |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3086 | } |
| 3087 | |
Max Reitz | 5f535a9 | 2014-12-02 18:32:41 +0100 | [diff] [blame] | 3088 | BlockDriver bdrv_file = { |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3089 | .format_name = "file", |
| 3090 | .protocol_name = "file", |
blueswir1 | 856ae5c | 2009-04-07 17:57:09 +0000 | [diff] [blame] | 3091 | .instance_size = sizeof(BDRVRawState), |
BenoƮt Canet | 030be32 | 2013-09-24 17:07:04 +0200 | [diff] [blame] | 3092 | .bdrv_needs_filename = true, |
blueswir1 | 856ae5c | 2009-04-07 17:57:09 +0000 | [diff] [blame] | 3093 | .bdrv_probe = NULL, /* no probe for protocols */ |
Max Reitz | 078896a | 2014-03-05 22:41:37 +0100 | [diff] [blame] | 3094 | .bdrv_parse_filename = raw_parse_filename, |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 3095 | .bdrv_file_open = raw_open, |
Jeff Cody | eeb6b45 | 2012-09-20 15:13:25 -0400 | [diff] [blame] | 3096 | .bdrv_reopen_prepare = raw_reopen_prepare, |
| 3097 | .bdrv_reopen_commit = raw_reopen_commit, |
| 3098 | .bdrv_reopen_abort = raw_reopen_abort, |
blueswir1 | 856ae5c | 2009-04-07 17:57:09 +0000 | [diff] [blame] | 3099 | .bdrv_close = raw_close, |
Kevin Wolf | 927f11e | 2018-01-16 16:04:21 +0100 | [diff] [blame] | 3100 | .bdrv_co_create = raw_co_create, |
Stefan Hajnoczi | efc75e2 | 2018-01-18 13:43:45 +0100 | [diff] [blame] | 3101 | .bdrv_co_create_opts = raw_co_create_opts, |
Peter Lieven | 3ac2162 | 2013-06-28 12:47:42 +0200 | [diff] [blame] | 3102 | .bdrv_has_zero_init = bdrv_has_zero_init_1, |
Eric Blake | a290f08 | 2018-02-13 14:26:44 -0600 | [diff] [blame] | 3103 | .bdrv_co_block_status = raw_co_block_status, |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 3104 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
Eric Blake | 2ffa76c | 2016-06-01 15:10:10 -0600 | [diff] [blame] | 3105 | .bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes, |
Daniel Henrique Barboza | 9bffae1 | 2020-01-30 18:39:04 -0300 | [diff] [blame] | 3106 | .bdrv_co_delete_file = raw_co_delete_file, |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3107 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 3108 | .bdrv_co_preadv = raw_co_preadv, |
| 3109 | .bdrv_co_pwritev = raw_co_pwritev, |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3110 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
| 3111 | .bdrv_co_pdiscard = raw_co_pdiscard, |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3112 | .bdrv_co_copy_range_from = raw_co_copy_range_from, |
| 3113 | .bdrv_co_copy_range_to = raw_co_copy_range_to, |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 3114 | .bdrv_refresh_limits = raw_refresh_limits, |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 3115 | .bdrv_io_plug = raw_aio_plug, |
| 3116 | .bdrv_io_unplug = raw_aio_unplug, |
Nishanth Aravamudan | ed6e216 | 2018-06-22 12:37:00 -0700 | [diff] [blame] | 3117 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
aliguori | 3c529d9 | 2008-12-12 16:41:40 +0000 | [diff] [blame] | 3118 | |
Kevin Wolf | 061ca8a | 2018-06-21 17:54:35 +0200 | [diff] [blame] | 3119 | .bdrv_co_truncate = raw_co_truncate, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 3120 | .bdrv_getlength = raw_getlength, |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 3121 | .bdrv_get_info = raw_get_info, |
Fam Zheng | 4a1d5e1 | 2011-07-12 19:56:39 +0800 | [diff] [blame] | 3122 | .bdrv_get_allocated_file_size |
| 3123 | = raw_get_allocated_file_size, |
Anton Nefedov | d924559 | 2019-09-23 15:17:37 +0300 | [diff] [blame] | 3124 | .bdrv_get_specific_stats = raw_get_specific_stats, |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 3125 | .bdrv_check_perm = raw_check_perm, |
| 3126 | .bdrv_set_perm = raw_set_perm, |
| 3127 | .bdrv_abort_perm_update = raw_abort_perm_update, |
Chunyan Liu | 6f482f7 | 2014-06-05 17:21:01 +0800 | [diff] [blame] | 3128 | .create_opts = &raw_create_opts, |
Alberto Garcia | 8a2ce0b | 2019-03-12 18:48:48 +0200 | [diff] [blame] | 3129 | .mutable_opts = mutable_opts, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 3130 | }; |
| 3131 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3132 | /***********************************************/ |
| 3133 | /* host device */ |
| 3134 | |
Pavel Borzenkov | 83affaa | 2011-11-10 22:40:06 +0400 | [diff] [blame] | 3135 | #if defined(__APPLE__) && defined(__MACH__) |
Programmingkid | 98caa5b | 2015-11-20 19:17:48 -0500 | [diff] [blame] | 3136 | static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
| 3137 | CFIndex maxPathSize, int flags); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3138 | static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3139 | { |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3140 | kern_return_t kernResult = KERN_FAILURE; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3141 | mach_port_t masterPort; |
| 3142 | CFMutableDictionaryRef classesToMatch; |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3143 | const char *matching_array[] = {kIODVDMediaClass, kIOCDMediaClass}; |
| 3144 | char *mediaType = NULL; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3145 | |
| 3146 | kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
| 3147 | if ( KERN_SUCCESS != kernResult ) { |
| 3148 | printf( "IOMasterPort returned %d\n", kernResult ); |
| 3149 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3150 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3151 | int index; |
| 3152 | for (index = 0; index < ARRAY_SIZE(matching_array); index++) { |
| 3153 | classesToMatch = IOServiceMatching(matching_array[index]); |
| 3154 | if (classesToMatch == NULL) { |
| 3155 | error_report("IOServiceMatching returned NULL for %s", |
| 3156 | matching_array[index]); |
| 3157 | continue; |
| 3158 | } |
| 3159 | CFDictionarySetValue(classesToMatch, CFSTR(kIOMediaEjectableKey), |
| 3160 | kCFBooleanTrue); |
| 3161 | kernResult = IOServiceGetMatchingServices(masterPort, classesToMatch, |
| 3162 | mediaIterator); |
| 3163 | if (kernResult != KERN_SUCCESS) { |
| 3164 | error_report("Note: IOServiceGetMatchingServices returned %d", |
| 3165 | kernResult); |
| 3166 | continue; |
| 3167 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3168 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3169 | /* If a match was found, leave the loop */ |
| 3170 | if (*mediaIterator != 0) { |
Laurent Vivier | 4f7d28d | 2018-12-13 17:27:26 +0100 | [diff] [blame] | 3171 | trace_file_FindEjectableOpticalMedia(matching_array[index]); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3172 | mediaType = g_strdup(matching_array[index]); |
| 3173 | break; |
| 3174 | } |
| 3175 | } |
| 3176 | return mediaType; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3177 | } |
| 3178 | |
Programmingkid | 98caa5b | 2015-11-20 19:17:48 -0500 | [diff] [blame] | 3179 | kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath, |
| 3180 | CFIndex maxPathSize, int flags) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3181 | { |
| 3182 | io_object_t nextMedia; |
| 3183 | kern_return_t kernResult = KERN_FAILURE; |
| 3184 | *bsdPath = '\0'; |
| 3185 | nextMedia = IOIteratorNext( mediaIterator ); |
| 3186 | if ( nextMedia ) |
| 3187 | { |
| 3188 | CFTypeRef bsdPathAsCFString; |
| 3189 | bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); |
| 3190 | if ( bsdPathAsCFString ) { |
| 3191 | size_t devPathLength; |
| 3192 | strcpy( bsdPath, _PATH_DEV ); |
Programmingkid | 98caa5b | 2015-11-20 19:17:48 -0500 | [diff] [blame] | 3193 | if (flags & BDRV_O_NOCACHE) { |
| 3194 | strcat(bsdPath, "r"); |
| 3195 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3196 | devPathLength = strlen( bsdPath ); |
| 3197 | if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { |
| 3198 | kernResult = KERN_SUCCESS; |
| 3199 | } |
| 3200 | CFRelease( bsdPathAsCFString ); |
| 3201 | } |
| 3202 | IOObjectRelease( nextMedia ); |
| 3203 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3204 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3205 | return kernResult; |
| 3206 | } |
| 3207 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3208 | /* Sets up a real cdrom for use in QEMU */ |
| 3209 | static bool setup_cdrom(char *bsd_path, Error **errp) |
| 3210 | { |
| 3211 | int index, num_of_test_partitions = 2, fd; |
| 3212 | char test_partition[MAXPATHLEN]; |
| 3213 | bool partition_found = false; |
| 3214 | |
| 3215 | /* look for a working partition */ |
| 3216 | for (index = 0; index < num_of_test_partitions; index++) { |
| 3217 | snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path, |
| 3218 | index); |
| 3219 | fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE); |
| 3220 | if (fd >= 0) { |
| 3221 | partition_found = true; |
| 3222 | qemu_close(fd); |
| 3223 | break; |
| 3224 | } |
| 3225 | } |
| 3226 | |
| 3227 | /* if a working partition on the device was not found */ |
| 3228 | if (partition_found == false) { |
| 3229 | error_setg(errp, "Failed to find a working partition on disc"); |
| 3230 | } else { |
Laurent Vivier | 4f7d28d | 2018-12-13 17:27:26 +0100 | [diff] [blame] | 3231 | trace_file_setup_cdrom(test_partition); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3232 | pstrcpy(bsd_path, MAXPATHLEN, test_partition); |
| 3233 | } |
| 3234 | return partition_found; |
| 3235 | } |
| 3236 | |
| 3237 | /* Prints directions on mounting and unmounting a device */ |
| 3238 | static void print_unmounting_directions(const char *file_name) |
| 3239 | { |
| 3240 | error_report("If device %s is mounted on the desktop, unmount" |
| 3241 | " it first before using it in QEMU", file_name); |
| 3242 | error_report("Command to unmount device: diskutil unmountDisk %s", |
| 3243 | file_name); |
| 3244 | error_report("Command to mount device: diskutil mountDisk %s", file_name); |
| 3245 | } |
| 3246 | |
| 3247 | #endif /* defined(__APPLE__) && defined(__MACH__) */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3248 | |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3249 | static int hdev_probe_device(const char *filename) |
| 3250 | { |
| 3251 | struct stat st; |
| 3252 | |
| 3253 | /* allow a dedicated CD-ROM driver to match with a higher priority */ |
| 3254 | if (strstart(filename, "/dev/cdrom", NULL)) |
| 3255 | return 50; |
| 3256 | |
| 3257 | if (stat(filename, &st) >= 0 && |
| 3258 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
| 3259 | return 100; |
| 3260 | } |
| 3261 | |
| 3262 | return 0; |
| 3263 | } |
| 3264 | |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3265 | static int check_hdev_writable(BDRVRawState *s) |
| 3266 | { |
| 3267 | #if defined(BLKROGET) |
| 3268 | /* Linux block devices can be configured "read-only" using blockdev(8). |
| 3269 | * This is independent of device node permissions and therefore open(2) |
| 3270 | * with O_RDWR succeeds. Actual writes fail with EPERM. |
| 3271 | * |
| 3272 | * bdrv_open() is supposed to fail if the disk is read-only. Explicitly |
| 3273 | * check for read-only block devices so that Linux block devices behave |
| 3274 | * properly. |
| 3275 | */ |
| 3276 | struct stat st; |
| 3277 | int readonly = 0; |
| 3278 | |
| 3279 | if (fstat(s->fd, &st)) { |
| 3280 | return -errno; |
| 3281 | } |
| 3282 | |
| 3283 | if (!S_ISBLK(st.st_mode)) { |
| 3284 | return 0; |
| 3285 | } |
| 3286 | |
| 3287 | if (ioctl(s->fd, BLKROGET, &readonly) < 0) { |
| 3288 | return -errno; |
| 3289 | } |
| 3290 | |
| 3291 | if (readonly) { |
| 3292 | return -EACCES; |
| 3293 | } |
| 3294 | #endif /* defined(BLKROGET) */ |
| 3295 | return 0; |
| 3296 | } |
| 3297 | |
Max Reitz | 7af803d | 2014-03-08 00:39:41 +0100 | [diff] [blame] | 3298 | static void hdev_parse_filename(const char *filename, QDict *options, |
| 3299 | Error **errp) |
| 3300 | { |
Max Reitz | 03c320d | 2017-05-22 21:52:16 +0200 | [diff] [blame] | 3301 | bdrv_parse_filename_strip_prefix(filename, "host_device:", options); |
Max Reitz | 7af803d | 2014-03-08 00:39:41 +0100 | [diff] [blame] | 3302 | } |
| 3303 | |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3304 | static bool hdev_is_sg(BlockDriverState *bs) |
| 3305 | { |
| 3306 | |
| 3307 | #if defined(__linux__) |
| 3308 | |
Kevin Wolf | 0d4377b | 2016-10-20 14:50:12 +0200 | [diff] [blame] | 3309 | BDRVRawState *s = bs->opaque; |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3310 | struct stat st; |
| 3311 | struct sg_scsi_id scsiid; |
| 3312 | int sg_version; |
Kevin Wolf | 0d4377b | 2016-10-20 14:50:12 +0200 | [diff] [blame] | 3313 | int ret; |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3314 | |
Kevin Wolf | 0d4377b | 2016-10-20 14:50:12 +0200 | [diff] [blame] | 3315 | if (stat(bs->filename, &st) < 0 || !S_ISCHR(st.st_mode)) { |
| 3316 | return false; |
| 3317 | } |
| 3318 | |
| 3319 | ret = ioctl(s->fd, SG_GET_VERSION_NUM, &sg_version); |
| 3320 | if (ret < 0) { |
| 3321 | return false; |
| 3322 | } |
| 3323 | |
| 3324 | ret = ioctl(s->fd, SG_GET_SCSI_ID, &scsiid); |
| 3325 | if (ret >= 0) { |
Laurent Vivier | 4f7d28d | 2018-12-13 17:27:26 +0100 | [diff] [blame] | 3326 | trace_file_hdev_is_sg(scsiid.scsi_type, sg_version); |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3327 | return true; |
| 3328 | } |
| 3329 | |
| 3330 | #endif |
| 3331 | |
| 3332 | return false; |
| 3333 | } |
| 3334 | |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 3335 | static int hdev_open(BlockDriverState *bs, QDict *options, int flags, |
| 3336 | Error **errp) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3337 | { |
| 3338 | BDRVRawState *s = bs->opaque; |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 3339 | Error *local_err = NULL; |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3340 | int ret; |
aliguori | a76bab4 | 2008-09-22 19:17:18 +0000 | [diff] [blame] | 3341 | |
Pavel Borzenkov | 83affaa | 2011-11-10 22:40:06 +0400 | [diff] [blame] | 3342 | #if defined(__APPLE__) && defined(__MACH__) |
Markus Armbruster | 129c7d1 | 2017-03-30 19:43:12 +0200 | [diff] [blame] | 3343 | /* |
| 3344 | * Caution: while qdict_get_str() is fine, getting non-string types |
| 3345 | * would require more care. When @options come from -blockdev or |
| 3346 | * blockdev_add, its members are typed according to the QAPI |
| 3347 | * schema, but when they come from -drive, they're all QString. |
| 3348 | */ |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3349 | const char *filename = qdict_get_str(options, "filename"); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3350 | char bsd_path[MAXPATHLEN] = ""; |
| 3351 | bool error_occurred = false; |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3352 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3353 | /* If using a real cdrom */ |
| 3354 | if (strcmp(filename, "/dev/cdrom") == 0) { |
| 3355 | char *mediaType = NULL; |
| 3356 | kern_return_t ret_val; |
| 3357 | io_iterator_t mediaIterator = 0; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3358 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3359 | mediaType = FindEjectableOpticalMedia(&mediaIterator); |
| 3360 | if (mediaType == NULL) { |
| 3361 | error_setg(errp, "Please make sure your CD/DVD is in the optical" |
| 3362 | " drive"); |
| 3363 | error_occurred = true; |
| 3364 | goto hdev_open_Mac_error; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3365 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3366 | |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3367 | ret_val = GetBSDPath(mediaIterator, bsd_path, sizeof(bsd_path), flags); |
| 3368 | if (ret_val != KERN_SUCCESS) { |
| 3369 | error_setg(errp, "Could not get BSD path for optical drive"); |
| 3370 | error_occurred = true; |
| 3371 | goto hdev_open_Mac_error; |
| 3372 | } |
| 3373 | |
| 3374 | /* If a real optical drive was not found */ |
| 3375 | if (bsd_path[0] == '\0') { |
| 3376 | error_setg(errp, "Failed to obtain bsd path for optical drive"); |
| 3377 | error_occurred = true; |
| 3378 | goto hdev_open_Mac_error; |
| 3379 | } |
| 3380 | |
| 3381 | /* If using a cdrom disc and finding a partition on the disc failed */ |
| 3382 | if (strncmp(mediaType, kIOCDMediaClass, 9) == 0 && |
| 3383 | setup_cdrom(bsd_path, errp) == false) { |
| 3384 | print_unmounting_directions(bsd_path); |
| 3385 | error_occurred = true; |
| 3386 | goto hdev_open_Mac_error; |
| 3387 | } |
| 3388 | |
Eric Blake | 46f5ac2 | 2017-04-27 16:58:17 -0500 | [diff] [blame] | 3389 | qdict_put_str(options, "filename", bsd_path); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3390 | |
| 3391 | hdev_open_Mac_error: |
| 3392 | g_free(mediaType); |
| 3393 | if (mediaIterator) { |
| 3394 | IOObjectRelease(mediaIterator); |
| 3395 | } |
| 3396 | if (error_occurred) { |
| 3397 | return -ENOENT; |
| 3398 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3399 | } |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3400 | #endif /* defined(__APPLE__) && defined(__MACH__) */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3401 | |
| 3402 | s->type = FTYPE_FILE; |
Christoph Hellwig | 90babde | 2009-06-15 13:53:38 +0200 | [diff] [blame] | 3403 | |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 3404 | ret = raw_open_common(bs, options, flags, 0, true, &local_err); |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3405 | if (ret < 0) { |
Eduardo Habkost | 621ff94 | 2016-06-13 18:57:56 -0300 | [diff] [blame] | 3406 | error_propagate(errp, local_err); |
Programmingkid | d0855f1 | 2016-03-21 11:41:28 -0400 | [diff] [blame] | 3407 | #if defined(__APPLE__) && defined(__MACH__) |
| 3408 | if (*bsd_path) { |
| 3409 | filename = bsd_path; |
| 3410 | } |
| 3411 | /* if a physical device experienced an error while being opened */ |
| 3412 | if (strncmp(filename, "/dev/", 5) == 0) { |
| 3413 | print_unmounting_directions(filename); |
| 3414 | } |
| 3415 | #endif /* defined(__APPLE__) && defined(__MACH__) */ |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3416 | return ret; |
| 3417 | } |
| 3418 | |
Dimitris Aragiorgis | 3307ed7 | 2015-06-23 13:45:00 +0300 | [diff] [blame] | 3419 | /* Since this does ioctl the device must be already opened */ |
| 3420 | bs->sg = hdev_is_sg(bs); |
| 3421 | |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3422 | if (flags & BDRV_O_RDWR) { |
| 3423 | ret = check_hdev_writable(s); |
| 3424 | if (ret < 0) { |
| 3425 | raw_close(bs); |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 3426 | error_setg_errno(errp, -ret, "The device is not writable"); |
Stefan Hajnoczi | da888d3 | 2013-02-05 12:28:33 +0100 | [diff] [blame] | 3427 | return ret; |
| 3428 | } |
| 3429 | } |
| 3430 | |
| 3431 | return ret; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3432 | } |
| 3433 | |
aliguori | 03ff3ca | 2008-09-15 15:51:35 +0000 | [diff] [blame] | 3434 | #if defined(__linux__) |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3435 | static int coroutine_fn |
| 3436 | hdev_co_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 3437 | { |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 3438 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 0342567 | 2018-10-31 11:30:42 +0100 | [diff] [blame] | 3439 | RawPosixAIOData acb; |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3440 | int ret; |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 3441 | |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3442 | ret = fd_open(bs); |
| 3443 | if (ret < 0) { |
| 3444 | return ret; |
| 3445 | } |
Paolo Bonzini | c208e8c | 2012-11-02 16:14:20 +0100 | [diff] [blame] | 3446 | |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 3447 | if (req == SG_IO && s->pr_mgr) { |
| 3448 | struct sg_io_hdr *io_hdr = buf; |
| 3449 | if (io_hdr->cmdp[0] == PERSISTENT_RESERVE_OUT || |
| 3450 | io_hdr->cmdp[0] == PERSISTENT_RESERVE_IN) { |
| 3451 | return pr_manager_execute(s->pr_mgr, bdrv_get_aio_context(bs), |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3452 | s->fd, io_hdr); |
Paolo Bonzini | 7c9e527 | 2017-08-21 18:58:56 +0200 | [diff] [blame] | 3453 | } |
| 3454 | } |
| 3455 | |
Kevin Wolf | 0342567 | 2018-10-31 11:30:42 +0100 | [diff] [blame] | 3456 | acb = (RawPosixAIOData) { |
| 3457 | .bs = bs, |
| 3458 | .aio_type = QEMU_AIO_IOCTL, |
| 3459 | .aio_fildes = s->fd, |
| 3460 | .aio_offset = 0, |
| 3461 | .ioctl = { |
| 3462 | .buf = buf, |
| 3463 | .cmd = req, |
| 3464 | }, |
| 3465 | }; |
| 3466 | |
| 3467 | return raw_thread_pool_submit(bs, handle_aiocb_ioctl, &acb); |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 3468 | } |
Max Reitz | f709623 | 2015-10-19 17:53:07 +0200 | [diff] [blame] | 3469 | #endif /* linux */ |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 3470 | |
blueswir1 | 9f23011 | 2009-03-28 08:37:13 +0000 | [diff] [blame] | 3471 | static int fd_open(BlockDriverState *bs) |
| 3472 | { |
| 3473 | BDRVRawState *s = bs->opaque; |
| 3474 | |
| 3475 | /* this is just to ensure s->fd is sane (its called by io ops) */ |
| 3476 | if (s->fd >= 0) |
| 3477 | return 0; |
| 3478 | return -EIO; |
| 3479 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3480 | |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3481 | static coroutine_fn int |
| 3482 | hdev_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) |
Andreas FƤrber | c36dd8a | 2013-01-18 16:43:35 +0100 | [diff] [blame] | 3483 | { |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 3484 | BDRVRawState *s = bs->opaque; |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3485 | int ret; |
Andreas FƤrber | c36dd8a | 2013-01-18 16:43:35 +0100 | [diff] [blame] | 3486 | |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3487 | ret = fd_open(bs); |
| 3488 | if (ret < 0) { |
Anton Nefedov | 1c45036 | 2019-09-23 15:17:36 +0300 | [diff] [blame] | 3489 | raw_account_discard(s, bytes, ret); |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3490 | return ret; |
Andreas FƤrber | c36dd8a | 2013-01-18 16:43:35 +0100 | [diff] [blame] | 3491 | } |
Kevin Wolf | 46ee0f4 | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 3492 | return raw_do_pdiscard(bs, offset, bytes, true); |
Andreas FƤrber | c36dd8a | 2013-01-18 16:43:35 +0100 | [diff] [blame] | 3493 | } |
| 3494 | |
Eric Blake | 2ffa76c | 2016-06-01 15:10:10 -0600 | [diff] [blame] | 3495 | static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs, |
Manos Pitsidianakis | f5a5ca7 | 2017-06-09 13:18:08 +0300 | [diff] [blame] | 3496 | int64_t offset, int bytes, BdrvRequestFlags flags) |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 3497 | { |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 3498 | int rc; |
| 3499 | |
| 3500 | rc = fd_open(bs); |
| 3501 | if (rc < 0) { |
| 3502 | return rc; |
| 3503 | } |
Kevin Wolf | 34fa110 | 2018-07-26 11:28:30 +0200 | [diff] [blame] | 3504 | |
Kevin Wolf | 7154d8a | 2018-10-25 14:18:58 +0100 | [diff] [blame] | 3505 | return raw_do_pwrite_zeroes(bs, offset, bytes, flags, true); |
Paolo Bonzini | d0b4503 | 2013-11-22 13:39:56 +0100 | [diff] [blame] | 3506 | } |
| 3507 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3508 | static BlockDriver bdrv_host_device = { |
Kevin Wolf | 0b4ce02 | 2009-10-01 12:35:49 +0200 | [diff] [blame] | 3509 | .format_name = "host_device", |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3510 | .protocol_name = "host_device", |
Kevin Wolf | 0b4ce02 | 2009-10-01 12:35:49 +0200 | [diff] [blame] | 3511 | .instance_size = sizeof(BDRVRawState), |
BenoƮt Canet | 030be32 | 2013-09-24 17:07:04 +0200 | [diff] [blame] | 3512 | .bdrv_needs_filename = true, |
Kevin Wolf | 0b4ce02 | 2009-10-01 12:35:49 +0200 | [diff] [blame] | 3513 | .bdrv_probe_device = hdev_probe_device, |
Max Reitz | 7af803d | 2014-03-08 00:39:41 +0100 | [diff] [blame] | 3514 | .bdrv_parse_filename = hdev_parse_filename, |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 3515 | .bdrv_file_open = hdev_open, |
Kevin Wolf | 0b4ce02 | 2009-10-01 12:35:49 +0200 | [diff] [blame] | 3516 | .bdrv_close = raw_close, |
Jeff Cody | 1bc6b70 | 2012-11-20 10:21:10 -0500 | [diff] [blame] | 3517 | .bdrv_reopen_prepare = raw_reopen_prepare, |
| 3518 | .bdrv_reopen_commit = raw_reopen_commit, |
| 3519 | .bdrv_reopen_abort = raw_reopen_abort, |
Maxim Levitsky | 5a5e7f8 | 2020-03-26 03:12:18 +0200 | [diff] [blame] | 3520 | .bdrv_co_create_opts = bdrv_co_create_opts_simple, |
| 3521 | .create_opts = &bdrv_create_opts_simple, |
Alberto Garcia | 8a2ce0b | 2019-03-12 18:48:48 +0200 | [diff] [blame] | 3522 | .mutable_opts = mutable_opts, |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 3523 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
Eric Blake | 2ffa76c | 2016-06-01 15:10:10 -0600 | [diff] [blame] | 3524 | .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes, |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3525 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 3526 | .bdrv_co_preadv = raw_co_preadv, |
| 3527 | .bdrv_co_pwritev = raw_co_pwritev, |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3528 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
| 3529 | .bdrv_co_pdiscard = hdev_co_pdiscard, |
Fam Zheng | 1efad06 | 2018-06-01 17:26:43 +0800 | [diff] [blame] | 3530 | .bdrv_co_copy_range_from = raw_co_copy_range_from, |
| 3531 | .bdrv_co_copy_range_to = raw_co_copy_range_to, |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 3532 | .bdrv_refresh_limits = raw_refresh_limits, |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 3533 | .bdrv_io_plug = raw_aio_plug, |
| 3534 | .bdrv_io_unplug = raw_aio_unplug, |
Nishanth Aravamudan | 042b757 | 2018-07-18 14:12:56 -0700 | [diff] [blame] | 3535 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
aliguori | 3c529d9 | 2008-12-12 16:41:40 +0000 | [diff] [blame] | 3536 | |
Kevin Wolf | 061ca8a | 2018-06-21 17:54:35 +0200 | [diff] [blame] | 3537 | .bdrv_co_truncate = raw_co_truncate, |
aurel32 | e60f469 | 2009-03-07 22:00:29 +0000 | [diff] [blame] | 3538 | .bdrv_getlength = raw_getlength, |
Paolo Bonzini | 260a82e | 2013-11-22 13:39:55 +0100 | [diff] [blame] | 3539 | .bdrv_get_info = raw_get_info, |
Fam Zheng | 4a1d5e1 | 2011-07-12 19:56:39 +0800 | [diff] [blame] | 3540 | .bdrv_get_allocated_file_size |
| 3541 | = raw_get_allocated_file_size, |
Anton Nefedov | d924559 | 2019-09-23 15:17:37 +0300 | [diff] [blame] | 3542 | .bdrv_get_specific_stats = hdev_get_specific_stats, |
Fam Zheng | 244a566 | 2017-05-03 00:35:56 +0800 | [diff] [blame] | 3543 | .bdrv_check_perm = raw_check_perm, |
| 3544 | .bdrv_set_perm = raw_set_perm, |
| 3545 | .bdrv_abort_perm_update = raw_abort_perm_update, |
Ekaterina Tumanova | 1a9335e | 2015-02-16 12:47:56 +0100 | [diff] [blame] | 3546 | .bdrv_probe_blocksizes = hdev_probe_blocksizes, |
| 3547 | .bdrv_probe_geometry = hdev_probe_geometry, |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3548 | |
ths | 985a03b | 2007-12-24 16:10:43 +0000 | [diff] [blame] | 3549 | /* generic scsi device */ |
Christoph Hellwig | 63ec93d | 2009-06-15 14:04:34 +0200 | [diff] [blame] | 3550 | #ifdef __linux__ |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3551 | .bdrv_co_ioctl = hdev_co_ioctl, |
Christoph Hellwig | 63ec93d | 2009-06-15 14:04:34 +0200 | [diff] [blame] | 3552 | #endif |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 3553 | }; |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3554 | |
Max Reitz | 18fa1c4 | 2014-03-08 00:39:43 +0100 | [diff] [blame] | 3555 | #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| 3556 | static void cdrom_parse_filename(const char *filename, QDict *options, |
| 3557 | Error **errp) |
| 3558 | { |
Max Reitz | 03c320d | 2017-05-22 21:52:16 +0200 | [diff] [blame] | 3559 | bdrv_parse_filename_strip_prefix(filename, "host_cdrom:", options); |
Max Reitz | 18fa1c4 | 2014-03-08 00:39:43 +0100 | [diff] [blame] | 3560 | } |
| 3561 | #endif |
| 3562 | |
| 3563 | #ifdef __linux__ |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 3564 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
| 3565 | Error **errp) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3566 | { |
| 3567 | BDRVRawState *s = bs->opaque; |
| 3568 | |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3569 | s->type = FTYPE_CD; |
| 3570 | |
Blue Swirl | 19a3da7 | 2009-06-17 18:27:44 +0300 | [diff] [blame] | 3571 | /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 3572 | return raw_open_common(bs, options, flags, O_NONBLOCK, true, errp); |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3573 | } |
| 3574 | |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3575 | static int cdrom_probe_device(const char *filename) |
| 3576 | { |
Cole Robinson | 3baf720 | 2010-01-14 11:19:40 -0500 | [diff] [blame] | 3577 | int fd, ret; |
| 3578 | int prio = 0; |
Johannes Stezenbach | 343f856 | 2011-06-29 16:25:17 +0200 | [diff] [blame] | 3579 | struct stat st; |
Cole Robinson | 3baf720 | 2010-01-14 11:19:40 -0500 | [diff] [blame] | 3580 | |
Corey Bryant | 6165f4d | 2012-08-14 16:43:45 -0400 | [diff] [blame] | 3581 | fd = qemu_open(filename, O_RDONLY | O_NONBLOCK); |
Cole Robinson | 3baf720 | 2010-01-14 11:19:40 -0500 | [diff] [blame] | 3582 | if (fd < 0) { |
| 3583 | goto out; |
| 3584 | } |
Johannes Stezenbach | 343f856 | 2011-06-29 16:25:17 +0200 | [diff] [blame] | 3585 | ret = fstat(fd, &st); |
| 3586 | if (ret == -1 || !S_ISBLK(st.st_mode)) { |
| 3587 | goto outc; |
| 3588 | } |
Cole Robinson | 3baf720 | 2010-01-14 11:19:40 -0500 | [diff] [blame] | 3589 | |
| 3590 | /* Attempt to detect via a CDROM specific ioctl */ |
| 3591 | ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
| 3592 | if (ret >= 0) |
| 3593 | prio = 100; |
| 3594 | |
Johannes Stezenbach | 343f856 | 2011-06-29 16:25:17 +0200 | [diff] [blame] | 3595 | outc: |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 3596 | qemu_close(fd); |
Cole Robinson | 3baf720 | 2010-01-14 11:19:40 -0500 | [diff] [blame] | 3597 | out: |
| 3598 | return prio; |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3599 | } |
| 3600 | |
Max Reitz | e031f75 | 2015-10-19 17:53:11 +0200 | [diff] [blame] | 3601 | static bool cdrom_is_inserted(BlockDriverState *bs) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3602 | { |
| 3603 | BDRVRawState *s = bs->opaque; |
| 3604 | int ret; |
| 3605 | |
| 3606 | ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
Max Reitz | e031f75 | 2015-10-19 17:53:11 +0200 | [diff] [blame] | 3607 | return ret == CDS_DISC_OK; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3608 | } |
| 3609 | |
Luiz Capitulino | f36f394 | 2012-02-03 16:24:53 -0200 | [diff] [blame] | 3610 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3611 | { |
| 3612 | BDRVRawState *s = bs->opaque; |
| 3613 | |
| 3614 | if (eject_flag) { |
| 3615 | if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
| 3616 | perror("CDROMEJECT"); |
| 3617 | } else { |
| 3618 | if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
| 3619 | perror("CDROMEJECT"); |
| 3620 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3621 | } |
| 3622 | |
Markus Armbruster | 025e849 | 2011-09-06 18:58:47 +0200 | [diff] [blame] | 3623 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3624 | { |
| 3625 | BDRVRawState *s = bs->opaque; |
| 3626 | |
| 3627 | if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
| 3628 | /* |
| 3629 | * Note: an error can happen if the distribution automatically |
| 3630 | * mounts the CD-ROM |
| 3631 | */ |
| 3632 | /* perror("CDROM_LOCKDOOR"); */ |
| 3633 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3634 | } |
| 3635 | |
| 3636 | static BlockDriver bdrv_host_cdrom = { |
| 3637 | .format_name = "host_cdrom", |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3638 | .protocol_name = "host_cdrom", |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3639 | .instance_size = sizeof(BDRVRawState), |
BenoƮt Canet | 030be32 | 2013-09-24 17:07:04 +0200 | [diff] [blame] | 3640 | .bdrv_needs_filename = true, |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3641 | .bdrv_probe_device = cdrom_probe_device, |
Max Reitz | 18fa1c4 | 2014-03-08 00:39:43 +0100 | [diff] [blame] | 3642 | .bdrv_parse_filename = cdrom_parse_filename, |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 3643 | .bdrv_file_open = cdrom_open, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3644 | .bdrv_close = raw_close, |
Jeff Cody | 1bc6b70 | 2012-11-20 10:21:10 -0500 | [diff] [blame] | 3645 | .bdrv_reopen_prepare = raw_reopen_prepare, |
| 3646 | .bdrv_reopen_commit = raw_reopen_commit, |
| 3647 | .bdrv_reopen_abort = raw_reopen_abort, |
Maxim Levitsky | 5a5e7f8 | 2020-03-26 03:12:18 +0200 | [diff] [blame] | 3648 | .bdrv_co_create_opts = bdrv_co_create_opts_simple, |
| 3649 | .create_opts = &bdrv_create_opts_simple, |
Alberto Garcia | 8a2ce0b | 2019-03-12 18:48:48 +0200 | [diff] [blame] | 3650 | .mutable_opts = mutable_opts, |
Stefan Hajnoczi | dd577a2 | 2018-04-27 17:23:11 +0100 | [diff] [blame] | 3651 | .bdrv_co_invalidate_cache = raw_co_invalidate_cache, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3652 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 3653 | .bdrv_co_preadv = raw_co_preadv, |
| 3654 | .bdrv_co_pwritev = raw_co_pwritev, |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3655 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 3656 | .bdrv_refresh_limits = raw_refresh_limits, |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 3657 | .bdrv_io_plug = raw_aio_plug, |
| 3658 | .bdrv_io_unplug = raw_aio_unplug, |
Nishanth Aravamudan | 042b757 | 2018-07-18 14:12:56 -0700 | [diff] [blame] | 3659 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3660 | |
Kevin Wolf | 061ca8a | 2018-06-21 17:54:35 +0200 | [diff] [blame] | 3661 | .bdrv_co_truncate = raw_co_truncate, |
Kevin Wolf | b94a261 | 2013-10-29 12:18:58 +0100 | [diff] [blame] | 3662 | .bdrv_getlength = raw_getlength, |
| 3663 | .has_variable_length = true, |
Fam Zheng | 4a1d5e1 | 2011-07-12 19:56:39 +0800 | [diff] [blame] | 3664 | .bdrv_get_allocated_file_size |
| 3665 | = raw_get_allocated_file_size, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3666 | |
| 3667 | /* removable device support */ |
| 3668 | .bdrv_is_inserted = cdrom_is_inserted, |
| 3669 | .bdrv_eject = cdrom_eject, |
Markus Armbruster | 025e849 | 2011-09-06 18:58:47 +0200 | [diff] [blame] | 3670 | .bdrv_lock_medium = cdrom_lock_medium, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3671 | |
| 3672 | /* generic scsi device */ |
Kevin Wolf | 2f3a7ab | 2018-10-31 11:25:18 +0100 | [diff] [blame] | 3673 | .bdrv_co_ioctl = hdev_co_ioctl, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3674 | }; |
| 3675 | #endif /* __linux__ */ |
| 3676 | |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 3677 | #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
Andreas Tobler | 511018e | 2013-10-31 22:41:46 +0100 | [diff] [blame] | 3678 | static int cdrom_open(BlockDriverState *bs, QDict *options, int flags, |
| 3679 | Error **errp) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3680 | { |
| 3681 | BDRVRawState *s = bs->opaque; |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 3682 | Error *local_err = NULL; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3683 | int ret; |
| 3684 | |
| 3685 | s->type = FTYPE_CD; |
| 3686 | |
John Snow | 230ff73 | 2018-07-10 13:00:40 -0400 | [diff] [blame] | 3687 | ret = raw_open_common(bs, options, flags, 0, true, &local_err); |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 3688 | if (ret) { |
Eduardo Habkost | 621ff94 | 2016-06-13 18:57:56 -0300 | [diff] [blame] | 3689 | error_propagate(errp, local_err); |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3690 | return ret; |
Max Reitz | e428e43 | 2013-10-11 11:37:01 +0200 | [diff] [blame] | 3691 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3692 | |
Dong Xu Wang | 9b2260c | 2011-11-22 18:06:25 +0800 | [diff] [blame] | 3693 | /* make sure the door isn't locked at this time */ |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3694 | ioctl(s->fd, CDIOCALLOW); |
| 3695 | return 0; |
| 3696 | } |
| 3697 | |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3698 | static int cdrom_probe_device(const char *filename) |
| 3699 | { |
| 3700 | if (strstart(filename, "/dev/cd", NULL) || |
| 3701 | strstart(filename, "/dev/acd", NULL)) |
| 3702 | return 100; |
| 3703 | return 0; |
| 3704 | } |
| 3705 | |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3706 | static int cdrom_reopen(BlockDriverState *bs) |
| 3707 | { |
| 3708 | BDRVRawState *s = bs->opaque; |
| 3709 | int fd; |
| 3710 | |
| 3711 | /* |
| 3712 | * Force reread of possibly changed/newly loaded disc, |
| 3713 | * FreeBSD seems to not notice sometimes... |
| 3714 | */ |
| 3715 | if (s->fd >= 0) |
Corey Bryant | 2e1e79d | 2012-08-14 16:43:46 -0400 | [diff] [blame] | 3716 | qemu_close(s->fd); |
Corey Bryant | 6165f4d | 2012-08-14 16:43:45 -0400 | [diff] [blame] | 3717 | fd = qemu_open(bs->filename, s->open_flags, 0644); |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3718 | if (fd < 0) { |
| 3719 | s->fd = -1; |
| 3720 | return -EIO; |
| 3721 | } |
| 3722 | s->fd = fd; |
| 3723 | |
Dong Xu Wang | 9b2260c | 2011-11-22 18:06:25 +0800 | [diff] [blame] | 3724 | /* make sure the door isn't locked at this time */ |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3725 | ioctl(s->fd, CDIOCALLOW); |
| 3726 | return 0; |
| 3727 | } |
| 3728 | |
Max Reitz | e031f75 | 2015-10-19 17:53:11 +0200 | [diff] [blame] | 3729 | static bool cdrom_is_inserted(BlockDriverState *bs) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3730 | { |
| 3731 | return raw_getlength(bs) > 0; |
| 3732 | } |
| 3733 | |
Luiz Capitulino | f36f394 | 2012-02-03 16:24:53 -0200 | [diff] [blame] | 3734 | static void cdrom_eject(BlockDriverState *bs, bool eject_flag) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3735 | { |
| 3736 | BDRVRawState *s = bs->opaque; |
| 3737 | |
| 3738 | if (s->fd < 0) |
Markus Armbruster | 822e1cd | 2011-07-20 18:23:42 +0200 | [diff] [blame] | 3739 | return; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3740 | |
| 3741 | (void) ioctl(s->fd, CDIOCALLOW); |
| 3742 | |
| 3743 | if (eject_flag) { |
| 3744 | if (ioctl(s->fd, CDIOCEJECT) < 0) |
| 3745 | perror("CDIOCEJECT"); |
| 3746 | } else { |
| 3747 | if (ioctl(s->fd, CDIOCCLOSE) < 0) |
| 3748 | perror("CDIOCCLOSE"); |
| 3749 | } |
| 3750 | |
Markus Armbruster | 822e1cd | 2011-07-20 18:23:42 +0200 | [diff] [blame] | 3751 | cdrom_reopen(bs); |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3752 | } |
| 3753 | |
Markus Armbruster | 025e849 | 2011-09-06 18:58:47 +0200 | [diff] [blame] | 3754 | static void cdrom_lock_medium(BlockDriverState *bs, bool locked) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3755 | { |
| 3756 | BDRVRawState *s = bs->opaque; |
| 3757 | |
| 3758 | if (s->fd < 0) |
Markus Armbruster | 7bf37fe | 2011-07-20 18:23:41 +0200 | [diff] [blame] | 3759 | return; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3760 | if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
| 3761 | /* |
| 3762 | * Note: an error can happen if the distribution automatically |
| 3763 | * mounts the CD-ROM |
| 3764 | */ |
| 3765 | /* perror("CDROM_LOCKDOOR"); */ |
| 3766 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3767 | } |
| 3768 | |
| 3769 | static BlockDriver bdrv_host_cdrom = { |
| 3770 | .format_name = "host_cdrom", |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3771 | .protocol_name = "host_cdrom", |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3772 | .instance_size = sizeof(BDRVRawState), |
BenoƮt Canet | 030be32 | 2013-09-24 17:07:04 +0200 | [diff] [blame] | 3773 | .bdrv_needs_filename = true, |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3774 | .bdrv_probe_device = cdrom_probe_device, |
Max Reitz | 18fa1c4 | 2014-03-08 00:39:43 +0100 | [diff] [blame] | 3775 | .bdrv_parse_filename = cdrom_parse_filename, |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 3776 | .bdrv_file_open = cdrom_open, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3777 | .bdrv_close = raw_close, |
Jeff Cody | 1bc6b70 | 2012-11-20 10:21:10 -0500 | [diff] [blame] | 3778 | .bdrv_reopen_prepare = raw_reopen_prepare, |
| 3779 | .bdrv_reopen_commit = raw_reopen_commit, |
| 3780 | .bdrv_reopen_abort = raw_reopen_abort, |
Maxim Levitsky | 5a5e7f8 | 2020-03-26 03:12:18 +0200 | [diff] [blame] | 3781 | .bdrv_co_create_opts = bdrv_co_create_opts_simple, |
| 3782 | .create_opts = &bdrv_create_opts_simple, |
Alberto Garcia | 8a2ce0b | 2019-03-12 18:48:48 +0200 | [diff] [blame] | 3783 | .mutable_opts = mutable_opts, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3784 | |
Kevin Wolf | 9d52aa3 | 2016-06-03 17:36:27 +0200 | [diff] [blame] | 3785 | .bdrv_co_preadv = raw_co_preadv, |
| 3786 | .bdrv_co_pwritev = raw_co_pwritev, |
Kevin Wolf | 33d70fb | 2018-06-21 19:07:32 +0200 | [diff] [blame] | 3787 | .bdrv_co_flush_to_disk = raw_co_flush_to_disk, |
Paolo Bonzini | c25f53b | 2011-11-29 12:42:20 +0100 | [diff] [blame] | 3788 | .bdrv_refresh_limits = raw_refresh_limits, |
Ming Lei | 1b3abdc | 2014-07-04 18:04:34 +0800 | [diff] [blame] | 3789 | .bdrv_io_plug = raw_aio_plug, |
| 3790 | .bdrv_io_unplug = raw_aio_unplug, |
Nishanth Aravamudan | 042b757 | 2018-07-18 14:12:56 -0700 | [diff] [blame] | 3791 | .bdrv_attach_aio_context = raw_aio_attach_aio_context, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3792 | |
Kevin Wolf | 061ca8a | 2018-06-21 17:54:35 +0200 | [diff] [blame] | 3793 | .bdrv_co_truncate = raw_co_truncate, |
Kevin Wolf | b94a261 | 2013-10-29 12:18:58 +0100 | [diff] [blame] | 3794 | .bdrv_getlength = raw_getlength, |
| 3795 | .has_variable_length = true, |
Fam Zheng | 4a1d5e1 | 2011-07-12 19:56:39 +0800 | [diff] [blame] | 3796 | .bdrv_get_allocated_file_size |
| 3797 | = raw_get_allocated_file_size, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3798 | |
| 3799 | /* removable device support */ |
| 3800 | .bdrv_is_inserted = cdrom_is_inserted, |
| 3801 | .bdrv_eject = cdrom_eject, |
Markus Armbruster | 025e849 | 2011-09-06 18:58:47 +0200 | [diff] [blame] | 3802 | .bdrv_lock_medium = cdrom_lock_medium, |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3803 | }; |
| 3804 | #endif /* __FreeBSD__ */ |
| 3805 | |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3806 | static void bdrv_file_init(void) |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3807 | { |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 3808 | /* |
| 3809 | * Register all the drivers. Note that order is important, the driver |
| 3810 | * registered last will get probed first. |
| 3811 | */ |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3812 | bdrv_register(&bdrv_file); |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3813 | bdrv_register(&bdrv_host_device); |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3814 | #ifdef __linux__ |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3815 | bdrv_register(&bdrv_host_cdrom); |
| 3816 | #endif |
Aurelien Jarno | a167ba5 | 2009-11-29 18:00:41 +0100 | [diff] [blame] | 3817 | #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 3818 | bdrv_register(&bdrv_host_cdrom); |
| 3819 | #endif |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 3820 | } |
| 3821 | |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 3822 | block_init(bdrv_file_init); |