Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 1 | /* |
Wei Liu | f00d4f5 | 2015-11-18 18:05:29 +0000 | [diff] [blame] | 2 | * 9p Posix callback |
Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 3 | * |
| 4 | * Copyright IBM, Corp. 2010 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Anthony Liguori <aliguori@us.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 11 | */ |
Stefan Weil | 873c321 | 2011-06-01 12:35:14 +0530 | [diff] [blame] | 12 | |
Christian Schoenebeck | 6f56908 | 2021-05-06 15:12:23 +0200 | [diff] [blame] | 13 | /* |
| 14 | * Not so fast! You might want to read the 9p developer docs first: |
| 15 | * https://wiki.qemu.org/Documentation/9p |
| 16 | */ |
| 17 | |
Peter Maydell | fbc0412 | 2016-01-26 18:17:10 +0000 | [diff] [blame] | 18 | #include "qemu/osdep.h" |
Wei Liu | ebe74f8 | 2016-01-07 18:18:02 +0000 | [diff] [blame] | 19 | #include "9p.h" |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 20 | #include "9p-local.h" |
Wei Liu | 267ae09 | 2015-11-18 18:31:52 +0000 | [diff] [blame] | 21 | #include "9p-xattr.h" |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 22 | #include "9p-util.h" |
Stefan Weil | 69b1521 | 2014-05-02 22:22:32 +0200 | [diff] [blame] | 23 | #include "fsdev/qemu-fsdev.h" /* local_ops */ |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 24 | #include <arpa/inet.h> |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 25 | #include <pwd.h> |
| 26 | #include <grp.h> |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 27 | #include <sys/socket.h> |
| 28 | #include <sys/un.h> |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 29 | #include "qemu/xattr.h" |
Markus Armbruster | e688df6 | 2018-02-01 12:18:31 +0100 | [diff] [blame] | 30 | #include "qapi/error.h" |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 31 | #include "qemu/cutils.h" |
Greg Kurz | 63325b1 | 2016-01-22 15:12:17 +0100 | [diff] [blame] | 32 | #include "qemu/error-report.h" |
Markus Armbruster | 922a01a | 2018-02-01 12:18:46 +0100 | [diff] [blame] | 33 | #include "qemu/option.h" |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 34 | #include <libgen.h> |
Keno Fischer | e0bd743 | 2022-02-27 17:35:12 -0500 | [diff] [blame] | 35 | #ifdef CONFIG_LINUX |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 36 | #include <linux/fs.h> |
| 37 | #ifdef CONFIG_LINUX_MAGIC_H |
| 38 | #include <linux/magic.h> |
| 39 | #endif |
Keno Fischer | e0bd743 | 2022-02-27 17:35:12 -0500 | [diff] [blame] | 40 | #endif |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 41 | #include <sys/ioctl.h> |
| 42 | |
| 43 | #ifndef XFS_SUPER_MAGIC |
| 44 | #define XFS_SUPER_MAGIC 0x58465342 |
| 45 | #endif |
| 46 | #ifndef EXT2_SUPER_MAGIC |
| 47 | #define EXT2_SUPER_MAGIC 0xEF53 |
| 48 | #endif |
| 49 | #ifndef REISERFS_SUPER_MAGIC |
| 50 | #define REISERFS_SUPER_MAGIC 0x52654973 |
| 51 | #endif |
| 52 | #ifndef BTRFS_SUPER_MAGIC |
| 53 | #define BTRFS_SUPER_MAGIC 0x9123683E |
| 54 | #endif |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 55 | |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 56 | typedef struct { |
| 57 | int mountfd; |
| 58 | } LocalData; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 59 | |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 60 | int local_open_nofollow(FsContext *fs_ctx, const char *path, int flags, |
| 61 | mode_t mode) |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 62 | { |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 63 | LocalData *data = fs_ctx->private; |
Greg Kurz | 3dbcf27 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 64 | int fd = data->mountfd; |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 65 | |
Greg Kurz | 3dbcf27 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 66 | while (*path && fd != -1) { |
| 67 | const char *c; |
| 68 | int next_fd; |
| 69 | char *head; |
| 70 | |
| 71 | /* Only relative paths without consecutive slashes */ |
| 72 | assert(*path != '/'); |
| 73 | |
| 74 | head = g_strdup(path); |
Keno Fischer | 5c99fa3 | 2018-06-29 12:32:10 +0200 | [diff] [blame] | 75 | c = qemu_strchrnul(path, '/'); |
Greg Kurz | 3dbcf27 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 76 | if (*c) { |
| 77 | /* Intermediate path element */ |
| 78 | head[c - path] = 0; |
| 79 | path = c + 1; |
| 80 | next_fd = openat_dir(fd, head); |
| 81 | } else { |
| 82 | /* Rightmost path element */ |
| 83 | next_fd = openat_file(fd, head, flags, mode); |
| 84 | path = c; |
| 85 | } |
| 86 | g_free(head); |
| 87 | if (fd != data->mountfd) { |
| 88 | close_preserve_errno(fd); |
| 89 | } |
| 90 | fd = next_fd; |
Michael Tokarev | 1b6f85e | 2015-03-12 09:52:30 +0300 | [diff] [blame] | 91 | } |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 92 | |
Greg Kurz | 3dbcf27 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 93 | assert(fd != data->mountfd); |
| 94 | return fd; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 95 | } |
| 96 | |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 97 | int local_opendir_nofollow(FsContext *fs_ctx, const char *path) |
| 98 | { |
| 99 | return local_open_nofollow(fs_ctx, path, O_DIRECTORY | O_RDONLY, 0); |
| 100 | } |
| 101 | |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 102 | static void renameat_preserve_errno(int odirfd, const char *opath, int ndirfd, |
| 103 | const char *npath) |
| 104 | { |
| 105 | int serrno = errno; |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 106 | qemu_renameat(odirfd, opath, ndirfd, npath); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 107 | errno = serrno; |
| 108 | } |
| 109 | |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 110 | static void unlinkat_preserve_errno(int dirfd, const char *path, int flags) |
| 111 | { |
| 112 | int serrno = errno; |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 113 | qemu_unlinkat(dirfd, path, flags); |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 114 | errno = serrno; |
| 115 | } |
| 116 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 117 | #define VIRTFS_META_DIR ".virtfs_metadata" |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 118 | #define VIRTFS_META_ROOT_FILE VIRTFS_META_DIR "_root" |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 119 | |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 120 | static FILE *local_fopenat(int dirfd, const char *name, const char *mode) |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 121 | { |
| 122 | int fd, o_mode = 0; |
| 123 | FILE *fp; |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 124 | int flags; |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 125 | /* |
| 126 | * only supports two modes |
| 127 | */ |
| 128 | if (mode[0] == 'r') { |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 129 | flags = O_RDONLY; |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 130 | } else if (mode[0] == 'w') { |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 131 | flags = O_WRONLY | O_TRUNC | O_CREAT; |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 132 | o_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; |
| 133 | } else { |
| 134 | return NULL; |
| 135 | } |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 136 | fd = openat_file(dirfd, name, flags, o_mode); |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 137 | if (fd == -1) { |
| 138 | return NULL; |
| 139 | } |
| 140 | fp = fdopen(fd, mode); |
| 141 | if (!fp) { |
| 142 | close(fd); |
| 143 | } |
| 144 | return fp; |
| 145 | } |
| 146 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 147 | #define ATTR_MAX 100 |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 148 | static void local_mapped_file_attr(int dirfd, const char *name, |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 149 | struct stat *stbuf) |
| 150 | { |
| 151 | FILE *fp; |
| 152 | char buf[ATTR_MAX]; |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 153 | int map_dirfd; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 154 | |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 155 | if (strcmp(name, ".")) { |
| 156 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
| 157 | if (map_dirfd == -1) { |
| 158 | return; |
| 159 | } |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 160 | |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 161 | fp = local_fopenat(map_dirfd, name, "r"); |
| 162 | close_preserve_errno(map_dirfd); |
| 163 | } else { |
| 164 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "r"); |
| 165 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 166 | if (!fp) { |
| 167 | return; |
| 168 | } |
| 169 | memset(buf, 0, ATTR_MAX); |
| 170 | while (fgets(buf, ATTR_MAX, fp)) { |
| 171 | if (!strncmp(buf, "virtfs.uid", 10)) { |
Xinhao Zhang | 0101173 | 2020-10-30 12:35:13 +0800 | [diff] [blame] | 172 | stbuf->st_uid = atoi(buf + 11); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 173 | } else if (!strncmp(buf, "virtfs.gid", 10)) { |
Xinhao Zhang | 0101173 | 2020-10-30 12:35:13 +0800 | [diff] [blame] | 174 | stbuf->st_gid = atoi(buf + 11); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 175 | } else if (!strncmp(buf, "virtfs.mode", 11)) { |
Xinhao Zhang | 0101173 | 2020-10-30 12:35:13 +0800 | [diff] [blame] | 176 | stbuf->st_mode = atoi(buf + 12); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 177 | } else if (!strncmp(buf, "virtfs.rdev", 11)) { |
Xinhao Zhang | 0101173 | 2020-10-30 12:35:13 +0800 | [diff] [blame] | 178 | stbuf->st_rdev = atoi(buf + 12); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 179 | } |
| 180 | memset(buf, 0, ATTR_MAX); |
| 181 | } |
| 182 | fclose(fp); |
| 183 | } |
| 184 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 185 | static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 186 | { |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 187 | int err = -1; |
| 188 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 189 | char *name = g_path_get_basename(fs_path->data); |
| 190 | int dirfd; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 191 | |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 192 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 193 | if (dirfd == -1) { |
| 194 | goto out; |
| 195 | } |
| 196 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 197 | err = qemu_fstatat(dirfd, name, stbuf, AT_SYMLINK_NOFOLLOW); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 198 | if (err) { |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 199 | goto err_out; |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 200 | } |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 201 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 202 | /* Actual credentials are part of extended attrs */ |
| 203 | uid_t tmp_uid; |
| 204 | gid_t tmp_gid; |
| 205 | mode_t tmp_mode; |
| 206 | dev_t tmp_dev; |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 207 | |
| 208 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.uid", &tmp_uid, |
| 209 | sizeof(uid_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 210 | stbuf->st_uid = le32_to_cpu(tmp_uid); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 211 | } |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 212 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.gid", &tmp_gid, |
| 213 | sizeof(gid_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 214 | stbuf->st_gid = le32_to_cpu(tmp_gid); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 215 | } |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 216 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.mode", &tmp_mode, |
| 217 | sizeof(mode_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 218 | stbuf->st_mode = le32_to_cpu(tmp_mode); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 219 | } |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 220 | if (fgetxattrat_nofollow(dirfd, name, "user.virtfs.rdev", &tmp_dev, |
| 221 | sizeof(dev_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 222 | stbuf->st_rdev = le64_to_cpu(tmp_dev); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 223 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 224 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 225 | local_mapped_file_attr(dirfd, name, stbuf); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 226 | } |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 227 | |
| 228 | err_out: |
Greg Kurz | f9aef99 | 2017-02-26 23:43:48 +0100 | [diff] [blame] | 229 | close_preserve_errno(dirfd); |
| 230 | out: |
| 231 | g_free(name); |
| 232 | g_free(dirpath); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 233 | return err; |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 234 | } |
| 235 | |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 236 | static int local_set_mapped_file_attrat(int dirfd, const char *name, |
| 237 | FsCred *credp) |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 238 | { |
| 239 | FILE *fp; |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 240 | int ret; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 241 | char buf[ATTR_MAX]; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 242 | int uid = -1, gid = -1, mode = -1, rdev = -1; |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 243 | int map_dirfd = -1, map_fd; |
| 244 | bool is_root = !strcmp(name, "."); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 245 | |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 246 | if (is_root) { |
| 247 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "r"); |
| 248 | if (!fp) { |
| 249 | if (errno == ENOENT) { |
| 250 | goto update_map_file; |
| 251 | } else { |
| 252 | return -1; |
| 253 | } |
| 254 | } |
| 255 | } else { |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 256 | ret = qemu_mkdirat(dirfd, VIRTFS_META_DIR, 0700); |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 257 | if (ret < 0 && errno != EEXIST) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 258 | return -1; |
| 259 | } |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 260 | |
| 261 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
| 262 | if (map_dirfd == -1) { |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | fp = local_fopenat(map_dirfd, name, "r"); |
| 267 | if (!fp) { |
| 268 | if (errno == ENOENT) { |
| 269 | goto update_map_file; |
| 270 | } else { |
| 271 | close_preserve_errno(map_dirfd); |
| 272 | return -1; |
| 273 | } |
| 274 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 275 | } |
| 276 | memset(buf, 0, ATTR_MAX); |
| 277 | while (fgets(buf, ATTR_MAX, fp)) { |
| 278 | if (!strncmp(buf, "virtfs.uid", 10)) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 279 | uid = atoi(buf + 11); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 280 | } else if (!strncmp(buf, "virtfs.gid", 10)) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 281 | gid = atoi(buf + 11); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 282 | } else if (!strncmp(buf, "virtfs.mode", 11)) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 283 | mode = atoi(buf + 12); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 284 | } else if (!strncmp(buf, "virtfs.rdev", 11)) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 285 | rdev = atoi(buf + 12); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 286 | } |
| 287 | memset(buf, 0, ATTR_MAX); |
| 288 | } |
| 289 | fclose(fp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 290 | |
| 291 | update_map_file: |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 292 | if (is_root) { |
| 293 | fp = local_fopenat(dirfd, VIRTFS_META_ROOT_FILE, "w"); |
| 294 | } else { |
| 295 | fp = local_fopenat(map_dirfd, name, "w"); |
| 296 | /* We can't go this far with map_dirfd not being a valid file descriptor |
| 297 | * but some versions of gcc aren't smart enough to see it. |
| 298 | */ |
| 299 | if (map_dirfd != -1) { |
| 300 | close_preserve_errno(map_dirfd); |
| 301 | } |
| 302 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 303 | if (!fp) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 304 | return -1; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 305 | } |
| 306 | |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 307 | map_fd = fileno(fp); |
| 308 | assert(map_fd != -1); |
| 309 | ret = fchmod(map_fd, 0600); |
| 310 | assert(ret == 0); |
| 311 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 312 | if (credp->fc_uid != -1) { |
| 313 | uid = credp->fc_uid; |
| 314 | } |
| 315 | if (credp->fc_gid != -1) { |
| 316 | gid = credp->fc_gid; |
| 317 | } |
Keno Fischer | 230f1b3 | 2018-06-29 12:32:10 +0200 | [diff] [blame] | 318 | if (credp->fc_mode != (mode_t)-1) { |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 319 | mode = credp->fc_mode; |
| 320 | } |
| 321 | if (credp->fc_rdev != -1) { |
| 322 | rdev = credp->fc_rdev; |
| 323 | } |
| 324 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 325 | if (uid != -1) { |
| 326 | fprintf(fp, "virtfs.uid=%d\n", uid); |
| 327 | } |
| 328 | if (gid != -1) { |
| 329 | fprintf(fp, "virtfs.gid=%d\n", gid); |
| 330 | } |
| 331 | if (mode != -1) { |
| 332 | fprintf(fp, "virtfs.mode=%d\n", mode); |
| 333 | } |
| 334 | if (rdev != -1) { |
| 335 | fprintf(fp, "virtfs.rdev=%d\n", rdev); |
| 336 | } |
| 337 | fclose(fp); |
| 338 | |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int fchmodat_nofollow(int dirfd, const char *name, mode_t mode) |
| 343 | { |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 344 | struct stat stbuf; |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 345 | int fd, ret; |
| 346 | |
| 347 | /* FIXME: this should be handled with fchmodat(AT_SYMLINK_NOFOLLOW). |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 348 | * Unfortunately, the linux kernel doesn't implement it yet. |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 349 | */ |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 350 | |
| 351 | /* First, we clear non-racing symlinks out of the way. */ |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 352 | if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW)) { |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 353 | return -1; |
| 354 | } |
| 355 | if (S_ISLNK(stbuf.st_mode)) { |
| 356 | errno = ELOOP; |
| 357 | return -1; |
| 358 | } |
| 359 | |
Greg Kurz | aa5e85a | 2017-09-04 09:24:53 +0200 | [diff] [blame] | 360 | fd = openat_file(dirfd, name, O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0); |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 361 | #if O_PATH_9P_UTIL == 0 |
Greg Kurz | aa5e85a | 2017-09-04 09:24:53 +0200 | [diff] [blame] | 362 | /* Fallback for systems that don't support O_PATH: we depend on the file |
| 363 | * being readable or writable. |
| 364 | */ |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 365 | if (fd == -1) { |
| 366 | /* In case the file is writable-only and isn't a directory. */ |
| 367 | if (errno == EACCES) { |
| 368 | fd = openat_file(dirfd, name, O_WRONLY, 0); |
| 369 | } |
| 370 | if (fd == -1 && errno == EISDIR) { |
| 371 | errno = EACCES; |
| 372 | } |
| 373 | } |
| 374 | if (fd == -1) { |
| 375 | return -1; |
| 376 | } |
| 377 | ret = fchmod(fd, mode); |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 378 | #else |
Greg Kurz | aa5e85a | 2017-09-04 09:24:53 +0200 | [diff] [blame] | 379 | /* Access modes are ignored when O_PATH is supported. If name is a symbolic |
| 380 | * link, O_PATH | O_NOFOLLOW causes openat(2) to return a file descriptor |
| 381 | * referring to the symbolic link. |
| 382 | */ |
Greg Kurz | 4751fd5 | 2017-08-10 14:21:04 +0200 | [diff] [blame] | 383 | if (fd == -1) { |
| 384 | return -1; |
| 385 | } |
| 386 | |
| 387 | /* Now we handle racing symlinks. */ |
| 388 | ret = fstat(fd, &stbuf); |
| 389 | if (!ret) { |
| 390 | if (S_ISLNK(stbuf.st_mode)) { |
| 391 | errno = ELOOP; |
| 392 | ret = -1; |
| 393 | } else { |
| 394 | char *proc_path = g_strdup_printf("/proc/self/fd/%d", fd); |
| 395 | ret = chmod(proc_path, mode); |
| 396 | g_free(proc_path); |
| 397 | } |
| 398 | } |
| 399 | #endif |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 400 | close_preserve_errno(fd); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 401 | return ret; |
| 402 | } |
| 403 | |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 404 | static int local_set_xattrat(int dirfd, const char *path, FsCred *credp) |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 405 | { |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 406 | int err; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 407 | |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 408 | if (credp->fc_uid != -1) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 409 | uint32_t tmp_uid = cpu_to_le32(credp->fc_uid); |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 410 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.uid", &tmp_uid, |
| 411 | sizeof(uid_t), 0); |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 412 | if (err) { |
| 413 | return err; |
| 414 | } |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 415 | } |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 416 | if (credp->fc_gid != -1) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 417 | uint32_t tmp_gid = cpu_to_le32(credp->fc_gid); |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 418 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.gid", &tmp_gid, |
| 419 | sizeof(gid_t), 0); |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 420 | if (err) { |
| 421 | return err; |
| 422 | } |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 423 | } |
Keno Fischer | 230f1b3 | 2018-06-29 12:32:10 +0200 | [diff] [blame] | 424 | if (credp->fc_mode != (mode_t)-1) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 425 | uint32_t tmp_mode = cpu_to_le32(credp->fc_mode); |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 426 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.mode", &tmp_mode, |
| 427 | sizeof(mode_t), 0); |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 428 | if (err) { |
| 429 | return err; |
| 430 | } |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 431 | } |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 432 | if (credp->fc_rdev != -1) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 433 | uint64_t tmp_rdev = cpu_to_le64(credp->fc_rdev); |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 434 | err = fsetxattrat_nofollow(dirfd, path, "user.virtfs.rdev", &tmp_rdev, |
| 435 | sizeof(dev_t), 0); |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 436 | if (err) { |
| 437 | return err; |
| 438 | } |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 439 | } |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 440 | return 0; |
| 441 | } |
| 442 | |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 443 | static int local_set_cred_passthrough(FsContext *fs_ctx, int dirfd, |
| 444 | const char *name, FsCred *credp) |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 445 | { |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 446 | if (fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
Greg Kurz | b314f6a | 2017-03-06 17:34:01 +0100 | [diff] [blame] | 447 | AT_SYMLINK_NOFOLLOW) < 0) { |
Aneesh Kumar K.V | 12848bf | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 448 | /* |
| 449 | * If we fail to change ownership and if we are |
| 450 | * using security model none. Ignore the error |
| 451 | */ |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 452 | if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) { |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 453 | return -1; |
Aneesh Kumar K.V | 12848bf | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 454 | } |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 455 | } |
M. Mohan Kumar | 2d40564 | 2012-01-19 12:21:12 +0530 | [diff] [blame] | 456 | |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 457 | return fchmodat_nofollow(dirfd, name, credp->fc_mode & 07777); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 458 | } |
| 459 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 460 | static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path, |
| 461 | char *buf, size_t bufsz) |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 462 | { |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 463 | ssize_t tsize = -1; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 464 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 465 | if ((fs_ctx->export_flags & V9FS_SM_MAPPED) || |
| 466 | (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) { |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 467 | int fd; |
Greg Kurz | bec1e95 | 2017-02-26 23:43:40 +0100 | [diff] [blame] | 468 | |
| 469 | fd = local_open_nofollow(fs_ctx, fs_path->data, O_RDONLY, 0); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 470 | if (fd == -1) { |
| 471 | return -1; |
| 472 | } |
Nikita Ivanov | 37b0b24 | 2022-10-23 12:04:22 +0300 | [diff] [blame] | 473 | tsize = RETRY_ON_EINTR(read(fd, (void *)buf, bufsz)); |
Greg Kurz | bec1e95 | 2017-02-26 23:43:40 +0100 | [diff] [blame] | 474 | close_preserve_errno(fd); |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 475 | } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 476 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
Greg Kurz | bec1e95 | 2017-02-26 23:43:40 +0100 | [diff] [blame] | 477 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 478 | char *name = g_path_get_basename(fs_path->data); |
| 479 | int dirfd; |
| 480 | |
| 481 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 482 | if (dirfd == -1) { |
| 483 | goto out; |
| 484 | } |
| 485 | |
| 486 | tsize = readlinkat(dirfd, name, buf, bufsz); |
| 487 | close_preserve_errno(dirfd); |
| 488 | out: |
| 489 | g_free(name); |
| 490 | g_free(dirpath); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 491 | } |
| 492 | return tsize; |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 493 | } |
| 494 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 495 | static int local_close(FsContext *ctx, V9fsFidOpenState *fs) |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 496 | { |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 497 | return close(fs->fd); |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 498 | } |
| 499 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 500 | static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 501 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 502 | return closedir(fs->dir.stream); |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 503 | } |
Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 504 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 505 | static int local_open(FsContext *ctx, V9fsPath *fs_path, |
| 506 | int flags, V9fsFidOpenState *fs) |
Anthony Liguori | a6568fe | 2010-04-29 17:44:55 +0530 | [diff] [blame] | 507 | { |
Greg Kurz | 21328e1 | 2017-02-26 23:41:55 +0100 | [diff] [blame] | 508 | int fd; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 509 | |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 510 | fd = local_open_nofollow(ctx, fs_path->data, flags, 0); |
Greg Kurz | 21328e1 | 2017-02-26 23:41:55 +0100 | [diff] [blame] | 511 | if (fd == -1) { |
| 512 | return -1; |
| 513 | } |
| 514 | fs->fd = fd; |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 515 | return fs->fd; |
Anthony Liguori | a6568fe | 2010-04-29 17:44:55 +0530 | [diff] [blame] | 516 | } |
| 517 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 518 | static int local_opendir(FsContext *ctx, |
| 519 | V9fsPath *fs_path, V9fsFidOpenState *fs) |
Anthony Liguori | a6568fe | 2010-04-29 17:44:55 +0530 | [diff] [blame] | 520 | { |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 521 | int dirfd; |
Greg Kurz | 21328e1 | 2017-02-26 23:41:55 +0100 | [diff] [blame] | 522 | DIR *stream; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 523 | |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 524 | dirfd = local_opendir_nofollow(ctx, fs_path->data); |
| 525 | if (dirfd == -1) { |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 526 | return -1; |
| 527 | } |
Greg Kurz | 996a0d7 | 2017-02-26 23:42:18 +0100 | [diff] [blame] | 528 | |
| 529 | stream = fdopendir(dirfd); |
Greg Kurz | 21328e1 | 2017-02-26 23:41:55 +0100 | [diff] [blame] | 530 | if (!stream) { |
Greg Kurz | faab207 | 2017-03-06 17:34:01 +0100 | [diff] [blame] | 531 | close(dirfd); |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 532 | return -1; |
| 533 | } |
Greg Kurz | 21328e1 | 2017-02-26 23:41:55 +0100 | [diff] [blame] | 534 | fs->dir.stream = stream; |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 535 | return 0; |
Anthony Liguori | a6568fe | 2010-04-29 17:44:55 +0530 | [diff] [blame] | 536 | } |
| 537 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 538 | static void local_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 539 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 540 | rewinddir(fs->dir.stream); |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 541 | } |
| 542 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 543 | static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 544 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 545 | return telldir(fs->dir.stream); |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 546 | } |
| 547 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 548 | static bool local_is_mapped_file_metadata(FsContext *fs_ctx, const char *name) |
| 549 | { |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 550 | return |
| 551 | !strcmp(name, VIRTFS_META_DIR) || !strcmp(name, VIRTFS_META_ROOT_FILE); |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 552 | } |
| 553 | |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 554 | static struct dirent *local_readdir(FsContext *ctx, V9fsFidOpenState *fs) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 555 | { |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 556 | struct dirent *entry; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 557 | |
| 558 | again: |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 559 | entry = readdir(fs->dir.stream); |
| 560 | if (!entry) { |
| 561 | return NULL; |
| 562 | } |
Keno Fischer | 6b3b279 | 2022-02-27 17:35:15 -0500 | [diff] [blame] | 563 | #ifdef CONFIG_DARWIN |
| 564 | int off; |
| 565 | off = telldir(fs->dir.stream); |
| 566 | /* If telldir fails, fail the entire readdir call */ |
| 567 | if (off < 0) { |
| 568 | return NULL; |
| 569 | } |
| 570 | entry->d_seekoff = off; |
| 571 | #endif |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 572 | |
Bastian Blank | 840a1bf | 2014-08-22 13:22:21 +0400 | [diff] [blame] | 573 | if (ctx->export_flags & V9FS_SM_MAPPED) { |
| 574 | entry->d_type = DT_UNKNOWN; |
| 575 | } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 576 | if (local_is_mapped_file_metadata(ctx, entry->d_name)) { |
Greg Kurz | 81ffbf5 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 577 | /* skip the meta data */ |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 578 | goto again; |
| 579 | } |
Bastian Blank | 840a1bf | 2014-08-22 13:22:21 +0400 | [diff] [blame] | 580 | entry->d_type = DT_UNKNOWN; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 581 | } |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 582 | |
| 583 | return entry; |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 584 | } |
| 585 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 586 | static void local_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 587 | { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 588 | seekdir(fs->dir.stream, off); |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 589 | } |
| 590 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 591 | static ssize_t local_preadv(FsContext *ctx, V9fsFidOpenState *fs, |
| 592 | const struct iovec *iov, |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 593 | int iovcnt, off_t offset) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 594 | { |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 595 | #ifdef CONFIG_PREADV |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 596 | return preadv(fs->fd, iov, iovcnt, offset); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 597 | #else |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 598 | int err = lseek(fs->fd, offset, SEEK_SET); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 599 | if (err == -1) { |
| 600 | return err; |
| 601 | } else { |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 602 | return readv(fs->fd, iov, iovcnt); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 603 | } |
| 604 | #endif |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 605 | } |
| 606 | |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 607 | static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs, |
| 608 | const struct iovec *iov, |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 609 | int iovcnt, off_t offset) |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 610 | { |
Greg Kurz | 6fe76ac | 2017-01-23 09:46:13 +0100 | [diff] [blame] | 611 | ssize_t ret; |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 612 | #ifdef CONFIG_PREADV |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 613 | ret = pwritev(fs->fd, iov, iovcnt, offset); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 614 | #else |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 615 | int err = lseek(fs->fd, offset, SEEK_SET); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 616 | if (err == -1) { |
| 617 | return err; |
| 618 | } else { |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 619 | ret = writev(fs->fd, iov, iovcnt); |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 620 | } |
| 621 | #endif |
Aneesh Kumar K.V | d3ab98e | 2011-10-12 19:11:23 +0530 | [diff] [blame] | 622 | #ifdef CONFIG_SYNC_FILE_RANGE |
| 623 | if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) { |
| 624 | /* |
| 625 | * Initiate a writeback. This is not a data integrity sync. |
| 626 | * We want to ensure that we don't leave dirty pages in the cache |
Michael Tokarev | 28cbbdd | 2023-07-14 14:13:50 +0300 | [diff] [blame] | 627 | * after write when writeout=immediate is specified. |
Aneesh Kumar K.V | d3ab98e | 2011-10-12 19:11:23 +0530 | [diff] [blame] | 628 | */ |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 629 | sync_file_range(fs->fd, offset, ret, |
Aneesh Kumar K.V | d3ab98e | 2011-10-12 19:11:23 +0530 | [diff] [blame] | 630 | SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE); |
| 631 | } |
| 632 | #endif |
| 633 | return ret; |
Anthony Liguori | 8449360 | 2010-04-29 17:44:58 +0530 | [diff] [blame] | 634 | } |
| 635 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 636 | static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 637 | { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 638 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 639 | char *name = g_path_get_basename(fs_path->data); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 640 | int ret = -1; |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 641 | int dirfd; |
| 642 | |
| 643 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 644 | if (dirfd == -1) { |
| 645 | goto out; |
| 646 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 647 | |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 648 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 649 | ret = local_set_xattrat(dirfd, name, credp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 650 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 651 | ret = local_set_mapped_file_attrat(dirfd, name, credp); |
| 652 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 653 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 654 | ret = fchmodat_nofollow(dirfd, name, credp->fc_mode); |
Venkateswararao Jujjuri (JV) | e95ead3 | 2010-06-14 13:34:42 -0700 | [diff] [blame] | 655 | } |
Greg Kurz | e3187a4 | 2017-02-26 23:44:28 +0100 | [diff] [blame] | 656 | close_preserve_errno(dirfd); |
| 657 | |
| 658 | out: |
| 659 | g_free(dirpath); |
| 660 | g_free(name); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 661 | return ret; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 662 | } |
| 663 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 664 | static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path, |
| 665 | const char *name, FsCred *credp) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 666 | { |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 667 | int err = -1; |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 668 | int dirfd; |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 669 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 670 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 671 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 672 | errno = EINVAL; |
| 673 | return -1; |
| 674 | } |
| 675 | |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 676 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 677 | if (dirfd == -1) { |
| 678 | return -1; |
| 679 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 680 | |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 681 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 682 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Keno Fischer | 029ed1b | 2022-02-27 17:35:20 -0500 | [diff] [blame] | 683 | err = qemu_mknodat(dirfd, name, fs_ctx->fmode | S_IFREG, 0); |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 684 | if (err == -1) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 685 | goto out; |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 686 | } |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 687 | |
| 688 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 689 | err = local_set_xattrat(dirfd, name, credp); |
| 690 | } else { |
| 691 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 692 | } |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 693 | if (err == -1) { |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 694 | goto err_end; |
| 695 | } |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 696 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 697 | fs_ctx->export_flags & V9FS_SM_NONE) { |
Keno Fischer | 029ed1b | 2022-02-27 17:35:20 -0500 | [diff] [blame] | 698 | err = qemu_mknodat(dirfd, name, credp->fc_mode, credp->fc_rdev); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 699 | if (err == -1) { |
| 700 | goto out; |
| 701 | } |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 702 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 703 | if (err == -1) { |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 704 | goto err_end; |
| 705 | } |
| 706 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 707 | goto out; |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 708 | |
| 709 | err_end: |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 710 | unlinkat_preserve_errno(dirfd, name, 0); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 711 | out: |
Greg Kurz | d815e72 | 2017-02-26 23:44:54 +0100 | [diff] [blame] | 712 | close_preserve_errno(dirfd); |
Venkateswararao Jujjuri (JV) | 1c29331 | 2010-06-14 13:34:48 -0700 | [diff] [blame] | 713 | return err; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 714 | } |
| 715 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 716 | static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path, |
| 717 | const char *name, FsCred *credp) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 718 | { |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 719 | int err = -1; |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 720 | int dirfd; |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 721 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 722 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 723 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 724 | errno = EINVAL; |
| 725 | return -1; |
| 726 | } |
| 727 | |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 728 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 729 | if (dirfd == -1) { |
| 730 | return -1; |
| 731 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 732 | |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 733 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 734 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 735 | err = qemu_mkdirat(dirfd, name, fs_ctx->dmode); |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 736 | if (err == -1) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 737 | goto out; |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 738 | } |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 739 | credp->fc_mode = credp->fc_mode | S_IFDIR; |
| 740 | |
| 741 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 742 | err = local_set_xattrat(dirfd, name, credp); |
| 743 | } else { |
| 744 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
| 745 | } |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 746 | if (err == -1) { |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 747 | goto err_end; |
| 748 | } |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 749 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 750 | fs_ctx->export_flags & V9FS_SM_NONE) { |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 751 | err = qemu_mkdirat(dirfd, name, credp->fc_mode); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 752 | if (err == -1) { |
| 753 | goto out; |
| 754 | } |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 755 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 756 | if (err == -1) { |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 757 | goto err_end; |
| 758 | } |
| 759 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 760 | goto out; |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 761 | |
| 762 | err_end: |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 763 | unlinkat_preserve_errno(dirfd, name, AT_REMOVEDIR); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 764 | out: |
Greg Kurz | 3f3a169 | 2017-02-26 23:45:02 +0100 | [diff] [blame] | 765 | close_preserve_errno(dirfd); |
Venkateswararao Jujjuri (JV) | 00ec5c3 | 2010-06-14 13:34:46 -0700 | [diff] [blame] | 766 | return err; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 767 | } |
| 768 | |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 769 | static int local_fstat(FsContext *fs_ctx, int fid_type, |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 770 | V9fsFidOpenState *fs, struct stat *stbuf) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 771 | { |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 772 | int err, fd; |
| 773 | |
| 774 | if (fid_type == P9_FID_DIR) { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 775 | fd = dirfd(fs->dir.stream); |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 776 | } else { |
| 777 | fd = fs->fd; |
| 778 | } |
| 779 | |
| 780 | err = fstat(fd, stbuf); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 781 | if (err) { |
| 782 | return err; |
| 783 | } |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 784 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 785 | /* Actual credentials are part of extended attrs */ |
| 786 | uid_t tmp_uid; |
| 787 | gid_t tmp_gid; |
| 788 | mode_t tmp_mode; |
| 789 | dev_t tmp_dev; |
| 790 | |
Keno Fischer | b598932 | 2022-02-27 17:35:19 -0500 | [diff] [blame] | 791 | if (qemu_fgetxattr(fd, "user.virtfs.uid", |
| 792 | &tmp_uid, sizeof(uid_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 793 | stbuf->st_uid = le32_to_cpu(tmp_uid); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 794 | } |
Keno Fischer | b598932 | 2022-02-27 17:35:19 -0500 | [diff] [blame] | 795 | if (qemu_fgetxattr(fd, "user.virtfs.gid", |
| 796 | &tmp_gid, sizeof(gid_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 797 | stbuf->st_gid = le32_to_cpu(tmp_gid); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 798 | } |
Keno Fischer | b598932 | 2022-02-27 17:35:19 -0500 | [diff] [blame] | 799 | if (qemu_fgetxattr(fd, "user.virtfs.mode", |
| 800 | &tmp_mode, sizeof(mode_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 801 | stbuf->st_mode = le32_to_cpu(tmp_mode); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 802 | } |
Keno Fischer | b598932 | 2022-02-27 17:35:19 -0500 | [diff] [blame] | 803 | if (qemu_fgetxattr(fd, "user.virtfs.rdev", |
| 804 | &tmp_dev, sizeof(dev_t)) > 0) { |
Aneesh Kumar K.V | f8ad4a8 | 2014-08-03 17:02:55 +0530 | [diff] [blame] | 805 | stbuf->st_rdev = le64_to_cpu(tmp_dev); |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 806 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 807 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 808 | errno = EOPNOTSUPP; |
| 809 | return -1; |
Venkateswararao Jujjuri (JV) | 1237ad7 | 2010-06-14 13:34:44 -0700 | [diff] [blame] | 810 | } |
| 811 | return err; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 812 | } |
| 813 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 814 | static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name, |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 815 | int flags, FsCred *credp, V9fsFidOpenState *fs) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 816 | { |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 817 | int fd = -1; |
| 818 | int err = -1; |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 819 | int dirfd; |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 820 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 821 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 822 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 823 | errno = EINVAL; |
| 824 | return -1; |
| 825 | } |
| 826 | |
Aneesh Kumar K.V | 0ceb092 | 2013-05-20 19:43:15 +0530 | [diff] [blame] | 827 | /* |
| 828 | * Mark all the open to not follow symlinks |
| 829 | */ |
| 830 | flags |= O_NOFOLLOW; |
| 831 | |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 832 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 833 | if (dirfd == -1) { |
| 834 | return -1; |
| 835 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 836 | |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 837 | /* Determine the security model */ |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 838 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 839 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Tobias Schramm | b96feb2 | 2017-06-29 15:11:50 +0200 | [diff] [blame] | 840 | fd = openat_file(dirfd, name, flags, fs_ctx->fmode); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 841 | if (fd == -1) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 842 | goto out; |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 843 | } |
Xinhao Zhang | 0101173 | 2020-10-30 12:35:13 +0800 | [diff] [blame] | 844 | credp->fc_mode = credp->fc_mode | S_IFREG; |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 845 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
Michael Tokarev | 28cbbdd | 2023-07-14 14:13:50 +0300 | [diff] [blame] | 846 | /* Set client credentials in xattr */ |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 847 | err = local_set_xattrat(dirfd, name, credp); |
| 848 | } else { |
| 849 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 850 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 851 | if (err == -1) { |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 852 | goto err_end; |
| 853 | } |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 854 | } else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 855 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 856 | fd = openat_file(dirfd, name, flags, credp->fc_mode); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 857 | if (fd == -1) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 858 | goto out; |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 859 | } |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 860 | err = local_set_cred_passthrough(fs_ctx, dirfd, name, credp); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 861 | if (err == -1) { |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 862 | goto err_end; |
| 863 | } |
| 864 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 865 | err = fd; |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 866 | fs->fd = fd; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 867 | goto out; |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 868 | |
| 869 | err_end: |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 870 | unlinkat_preserve_errno(dirfd, name, |
| 871 | flags & O_DIRECTORY ? AT_REMOVEDIR : 0); |
| 872 | close_preserve_errno(fd); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 873 | out: |
Greg Kurz | a565fea | 2017-02-26 23:45:09 +0100 | [diff] [blame] | 874 | close_preserve_errno(dirfd); |
Venkateswararao Jujjuri (JV) | 4750a96 | 2010-06-14 13:34:45 -0700 | [diff] [blame] | 875 | return err; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 876 | } |
| 877 | |
Venkateswararao Jujjuri (JV) | 758e8e3 | 2010-06-14 13:34:41 -0700 | [diff] [blame] | 878 | |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 879 | static int local_symlink(FsContext *fs_ctx, const char *oldpath, |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 880 | V9fsPath *dir_path, const char *name, FsCred *credp) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 881 | { |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 882 | int err = -1; |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 883 | int dirfd; |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 884 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 885 | if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 886 | local_is_mapped_file_metadata(fs_ctx, name)) { |
| 887 | errno = EINVAL; |
| 888 | return -1; |
| 889 | } |
| 890 | |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 891 | dirfd = local_opendir_nofollow(fs_ctx, dir_path->data); |
| 892 | if (dirfd == -1) { |
| 893 | return -1; |
| 894 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 895 | |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 896 | /* Determine the security model */ |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 897 | if (fs_ctx->export_flags & V9FS_SM_MAPPED || |
| 898 | fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 899 | int fd; |
| 900 | ssize_t oldpath_size, write_size; |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 901 | |
| 902 | fd = openat_file(dirfd, name, O_CREAT | O_EXCL | O_RDWR, |
Tobias Schramm | b96feb2 | 2017-06-29 15:11:50 +0200 | [diff] [blame] | 903 | fs_ctx->fmode); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 904 | if (fd == -1) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 905 | goto out; |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 906 | } |
| 907 | /* Write the oldpath (target) to the file. */ |
Harsh Prateek Bora | f35bde2 | 2011-02-02 10:20:33 +0530 | [diff] [blame] | 908 | oldpath_size = strlen(oldpath); |
Nikita Ivanov | 37b0b24 | 2022-10-23 12:04:22 +0300 | [diff] [blame] | 909 | write_size = RETRY_ON_EINTR(write(fd, (void *)oldpath, oldpath_size)); |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 910 | close_preserve_errno(fd); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 911 | |
| 912 | if (write_size != oldpath_size) { |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 913 | goto err_end; |
| 914 | } |
Michael Tokarev | 28cbbdd | 2023-07-14 14:13:50 +0300 | [diff] [blame] | 915 | /* Set client credentials in symlink's xattr */ |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 916 | credp->fc_mode = credp->fc_mode | S_IFLNK; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 917 | |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 918 | if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 919 | err = local_set_xattrat(dirfd, name, credp); |
| 920 | } else { |
| 921 | err = local_set_mapped_file_attrat(dirfd, name, credp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 922 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 923 | if (err == -1) { |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 924 | goto err_end; |
| 925 | } |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 926 | } else if (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH || |
| 927 | fs_ctx->export_flags & V9FS_SM_NONE) { |
| 928 | err = symlinkat(oldpath, dirfd, name); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 929 | if (err) { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 930 | goto out; |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 931 | } |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 932 | err = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
| 933 | AT_SYMLINK_NOFOLLOW); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 934 | if (err == -1) { |
Aneesh Kumar K.V | 12848bf | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 935 | /* |
| 936 | * If we fail to change ownership and if we are |
| 937 | * using security model none. Ignore the error |
| 938 | */ |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 939 | if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) { |
Aneesh Kumar K.V | 12848bf | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 940 | goto err_end; |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 941 | } else { |
Aneesh Kumar K.V | 12848bf | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 942 | err = 0; |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 943 | } |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 944 | } |
| 945 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 946 | goto out; |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 947 | |
| 948 | err_end: |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 949 | unlinkat_preserve_errno(dirfd, name, 0); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 950 | out: |
Greg Kurz | 3877161 | 2017-02-26 23:44:46 +0100 | [diff] [blame] | 951 | close_preserve_errno(dirfd); |
Venkateswararao Jujjuri (JV) | 879c281 | 2010-06-14 13:34:47 -0700 | [diff] [blame] | 952 | return err; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 953 | } |
| 954 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 955 | static int local_link(FsContext *ctx, V9fsPath *oldpath, |
| 956 | V9fsPath *dirpath, const char *name) |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 957 | { |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 958 | char *odirpath = g_path_get_dirname(oldpath->data); |
| 959 | char *oname = g_path_get_basename(oldpath->data); |
| 960 | int ret = -1; |
| 961 | int odirfd, ndirfd; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 962 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 963 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 964 | local_is_mapped_file_metadata(ctx, name)) { |
| 965 | errno = EINVAL; |
Jiajun Chen | 841b8d0 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 966 | goto out; |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 967 | } |
| 968 | |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 969 | odirfd = local_opendir_nofollow(ctx, odirpath); |
| 970 | if (odirfd == -1) { |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 971 | goto out; |
| 972 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 973 | |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 974 | ndirfd = local_opendir_nofollow(ctx, dirpath->data); |
| 975 | if (ndirfd == -1) { |
| 976 | close_preserve_errno(odirfd); |
| 977 | goto out; |
| 978 | } |
| 979 | |
| 980 | ret = linkat(odirfd, oname, ndirfd, name, 0); |
| 981 | if (ret < 0) { |
| 982 | goto out_close; |
| 983 | } |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 984 | |
| 985 | /* now link the virtfs_metadata files */ |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 986 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 987 | int omap_dirfd, nmap_dirfd; |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 988 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 989 | ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700); |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 990 | if (ret < 0 && errno != EEXIST) { |
| 991 | goto err_undo_link; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 992 | } |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 993 | |
| 994 | omap_dirfd = openat_dir(odirfd, VIRTFS_META_DIR); |
| 995 | if (omap_dirfd == -1) { |
| 996 | goto err; |
| 997 | } |
| 998 | |
| 999 | nmap_dirfd = openat_dir(ndirfd, VIRTFS_META_DIR); |
| 1000 | if (nmap_dirfd == -1) { |
| 1001 | close_preserve_errno(omap_dirfd); |
| 1002 | goto err; |
| 1003 | } |
| 1004 | |
| 1005 | ret = linkat(omap_dirfd, oname, nmap_dirfd, name, 0); |
| 1006 | close_preserve_errno(nmap_dirfd); |
| 1007 | close_preserve_errno(omap_dirfd); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1008 | if (ret < 0 && errno != ENOENT) { |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 1009 | goto err_undo_link; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1010 | } |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 1011 | |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 1012 | ret = 0; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1013 | } |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 1014 | goto out_close; |
| 1015 | |
| 1016 | err: |
| 1017 | ret = -1; |
| 1018 | err_undo_link: |
| 1019 | unlinkat_preserve_errno(ndirfd, name, 0); |
| 1020 | out_close: |
| 1021 | close_preserve_errno(ndirfd); |
| 1022 | close_preserve_errno(odirfd); |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 1023 | out: |
Greg Kurz | ad0b46e | 2017-02-26 23:44:20 +0100 | [diff] [blame] | 1024 | g_free(oname); |
| 1025 | g_free(odirpath); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1026 | return ret; |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 1027 | } |
| 1028 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1029 | static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size) |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1030 | { |
Greg Kurz | ac125d9 | 2017-02-26 23:43:32 +0100 | [diff] [blame] | 1031 | int fd, ret; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1032 | |
Greg Kurz | ac125d9 | 2017-02-26 23:43:32 +0100 | [diff] [blame] | 1033 | fd = local_open_nofollow(ctx, fs_path->data, O_WRONLY, 0); |
| 1034 | if (fd == -1) { |
| 1035 | return -1; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1036 | } |
Greg Kurz | ac125d9 | 2017-02-26 23:43:32 +0100 | [diff] [blame] | 1037 | ret = ftruncate(fd, size); |
| 1038 | close_preserve_errno(fd); |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 1039 | return ret; |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1040 | } |
| 1041 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1042 | static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1043 | { |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1044 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 1045 | char *name = g_path_get_basename(fs_path->data); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1046 | int ret = -1; |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1047 | int dirfd; |
| 1048 | |
| 1049 | dirfd = local_opendir_nofollow(fs_ctx, dirpath); |
| 1050 | if (dirfd == -1) { |
| 1051 | goto out; |
| 1052 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1053 | |
Sripathi Kodi | c79ce73 | 2010-06-17 18:18:47 +0530 | [diff] [blame] | 1054 | if ((credp->fc_uid == -1 && credp->fc_gid == -1) || |
Aneesh Kumar K.V | 17b1971 | 2011-10-25 12:10:39 +0530 | [diff] [blame] | 1055 | (fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 1056 | (fs_ctx->export_flags & V9FS_SM_NONE)) { |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1057 | ret = fchownat(dirfd, name, credp->fc_uid, credp->fc_gid, |
| 1058 | AT_SYMLINK_NOFOLLOW); |
Aneesh Kumar K.V | b97400c | 2011-10-13 13:21:00 +0530 | [diff] [blame] | 1059 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1060 | ret = local_set_xattrat(dirfd, name, credp); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1061 | } else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1062 | ret = local_set_mapped_file_attrat(dirfd, name, credp); |
Venkateswararao Jujjuri (JV) | f7613be | 2010-06-14 13:34:43 -0700 | [diff] [blame] | 1063 | } |
Greg Kurz | d369f20 | 2017-02-26 23:44:37 +0100 | [diff] [blame] | 1064 | |
| 1065 | close_preserve_errno(dirfd); |
| 1066 | out: |
| 1067 | g_free(name); |
| 1068 | g_free(dirpath); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1069 | return ret; |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1070 | } |
| 1071 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1072 | static int local_utimensat(FsContext *s, V9fsPath *fs_path, |
Hidetoshi Seto | 3867142 | 2010-11-24 11:38:10 +0900 | [diff] [blame] | 1073 | const struct timespec *buf) |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1074 | { |
Greg Kurz | a33eda0 | 2017-02-26 23:43:17 +0100 | [diff] [blame] | 1075 | char *dirpath = g_path_get_dirname(fs_path->data); |
| 1076 | char *name = g_path_get_basename(fs_path->data); |
| 1077 | int dirfd, ret = -1; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1078 | |
Greg Kurz | a33eda0 | 2017-02-26 23:43:17 +0100 | [diff] [blame] | 1079 | dirfd = local_opendir_nofollow(s, dirpath); |
| 1080 | if (dirfd == -1) { |
| 1081 | goto out; |
| 1082 | } |
| 1083 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1084 | ret = qemu_utimensat(dirfd, name, buf, AT_SYMLINK_NOFOLLOW); |
Greg Kurz | a33eda0 | 2017-02-26 23:43:17 +0100 | [diff] [blame] | 1085 | close_preserve_errno(dirfd); |
| 1086 | out: |
| 1087 | g_free(dirpath); |
| 1088 | g_free(name); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1089 | return ret; |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1090 | } |
| 1091 | |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1092 | static int local_unlinkat_common(FsContext *ctx, int dirfd, const char *name, |
| 1093 | int flags) |
Anthony Liguori | 5bae190 | 2010-04-29 17:45:01 +0530 | [diff] [blame] | 1094 | { |
Daniel Henrique Barboza | 846cf40 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 1095 | int ret; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1096 | |
| 1097 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1098 | int map_dirfd; |
| 1099 | |
Greg Kurz | 6a87e79 | 2017-05-25 10:30:13 +0200 | [diff] [blame] | 1100 | /* We need to remove the metadata as well: |
| 1101 | * - the metadata directory if we're removing a directory |
| 1102 | * - the metadata file in the parent's metadata directory |
| 1103 | * |
| 1104 | * If any of these are missing (ie, ENOENT) then we're probably |
| 1105 | * trying to remove something that wasn't created in mapped-file |
| 1106 | * mode. We just ignore the error. |
| 1107 | */ |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1108 | if (flags == AT_REMOVEDIR) { |
| 1109 | int fd; |
| 1110 | |
Greg Kurz | b003fc0 | 2017-03-06 17:34:01 +0100 | [diff] [blame] | 1111 | fd = openat_dir(dirfd, name); |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1112 | if (fd == -1) { |
Daniel Henrique Barboza | 846cf40 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 1113 | return -1; |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1114 | } |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1115 | ret = qemu_unlinkat(fd, VIRTFS_META_DIR, AT_REMOVEDIR); |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1116 | close_preserve_errno(fd); |
| 1117 | if (ret < 0 && errno != ENOENT) { |
Daniel Henrique Barboza | 846cf40 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 1118 | return -1; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1119 | } |
| 1120 | } |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1121 | map_dirfd = openat_dir(dirfd, VIRTFS_META_DIR); |
Greg Kurz | 6a87e79 | 2017-05-25 10:30:13 +0200 | [diff] [blame] | 1122 | if (map_dirfd != -1) { |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1123 | ret = qemu_unlinkat(map_dirfd, name, 0); |
Greg Kurz | 6a87e79 | 2017-05-25 10:30:13 +0200 | [diff] [blame] | 1124 | close_preserve_errno(map_dirfd); |
| 1125 | if (ret < 0 && errno != ENOENT) { |
Daniel Henrique Barboza | 846cf40 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 1126 | return -1; |
Greg Kurz | 6a87e79 | 2017-05-25 10:30:13 +0200 | [diff] [blame] | 1127 | } |
| 1128 | } else if (errno != ENOENT) { |
Daniel Henrique Barboza | 846cf40 | 2020-01-20 15:11:39 +0100 | [diff] [blame] | 1129 | return -1; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1130 | } |
| 1131 | } |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1132 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1133 | return qemu_unlinkat(dirfd, name, flags); |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1134 | } |
| 1135 | |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1136 | static int local_remove(FsContext *ctx, const char *path) |
| 1137 | { |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1138 | struct stat stbuf; |
Greg Kurz | a0e640a | 2017-02-26 23:43:08 +0100 | [diff] [blame] | 1139 | char *dirpath = g_path_get_dirname(path); |
| 1140 | char *name = g_path_get_basename(path); |
| 1141 | int flags = 0; |
| 1142 | int dirfd; |
| 1143 | int err = -1; |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1144 | |
Greg Kurz | a0e640a | 2017-02-26 23:43:08 +0100 | [diff] [blame] | 1145 | dirfd = local_opendir_nofollow(ctx, dirpath); |
Greg Kurz | b7361d4 | 2017-03-06 17:34:01 +0100 | [diff] [blame] | 1146 | if (dirfd == -1) { |
Greg Kurz | a0e640a | 2017-02-26 23:43:08 +0100 | [diff] [blame] | 1147 | goto out; |
Venkateswararao Jujjuri (JV) | faa44e3 | 2011-06-01 12:35:14 +0530 | [diff] [blame] | 1148 | } |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1149 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1150 | if (qemu_fstatat(dirfd, name, &stbuf, AT_SYMLINK_NOFOLLOW) < 0) { |
Greg Kurz | a0e640a | 2017-02-26 23:43:08 +0100 | [diff] [blame] | 1151 | goto err_out; |
| 1152 | } |
| 1153 | |
| 1154 | if (S_ISDIR(stbuf.st_mode)) { |
| 1155 | flags |= AT_REMOVEDIR; |
| 1156 | } |
| 1157 | |
| 1158 | err = local_unlinkat_common(ctx, dirfd, name, flags); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1159 | err_out: |
Greg Kurz | a0e640a | 2017-02-26 23:43:08 +0100 | [diff] [blame] | 1160 | close_preserve_errno(dirfd); |
| 1161 | out: |
| 1162 | g_free(name); |
| 1163 | g_free(dirpath); |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1164 | return err; |
Anthony Liguori | 5bae190 | 2010-04-29 17:45:01 +0530 | [diff] [blame] | 1165 | } |
| 1166 | |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 1167 | static int local_fsync(FsContext *ctx, int fid_type, |
| 1168 | V9fsFidOpenState *fs, int datasync) |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1169 | { |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 1170 | int fd; |
| 1171 | |
| 1172 | if (fid_type == P9_FID_DIR) { |
Greg Kurz | f314ea4 | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 1173 | fd = dirfd(fs->dir.stream); |
Venkateswararao Jujjuri (JV) | 4959497 | 2010-10-22 10:08:45 -0700 | [diff] [blame] | 1174 | } else { |
Aneesh Kumar K.V | 8b88827 | 2011-12-04 22:35:28 +0530 | [diff] [blame] | 1175 | fd = fs->fd; |
| 1176 | } |
| 1177 | |
| 1178 | if (datasync) { |
| 1179 | return qemu_fdatasync(fd); |
| 1180 | } else { |
| 1181 | return fsync(fd); |
Venkateswararao Jujjuri (JV) | 4959497 | 2010-10-22 10:08:45 -0700 | [diff] [blame] | 1182 | } |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1183 | } |
| 1184 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1185 | static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf) |
M. Mohan Kumar | be940c8 | 2010-05-10 12:11:03 +0530 | [diff] [blame] | 1186 | { |
Greg Kurz | 31e51d1 | 2017-02-26 23:43:25 +0100 | [diff] [blame] | 1187 | int fd, ret; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1188 | |
Greg Kurz | 31e51d1 | 2017-02-26 23:43:25 +0100 | [diff] [blame] | 1189 | fd = local_open_nofollow(s, fs_path->data, O_RDONLY, 0); |
Greg Kurz | 23da014 | 2017-03-06 17:34:01 +0100 | [diff] [blame] | 1190 | if (fd == -1) { |
| 1191 | return -1; |
| 1192 | } |
Greg Kurz | 31e51d1 | 2017-02-26 23:43:25 +0100 | [diff] [blame] | 1193 | ret = fstatfs(fd, stbuf); |
| 1194 | close_preserve_errno(fd); |
Chen Gang | 4fa4ce7 | 2014-03-02 01:36:19 +0800 | [diff] [blame] | 1195 | return ret; |
M. Mohan Kumar | be940c8 | 2010-05-10 12:11:03 +0530 | [diff] [blame] | 1196 | } |
| 1197 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1198 | static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path, |
Aneesh Kumar K.V | fa32ef8 | 2010-09-02 11:09:06 +0530 | [diff] [blame] | 1199 | const char *name, void *value, size_t size) |
| 1200 | { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1201 | char *path = fs_path->data; |
| 1202 | |
Aneesh Kumar K.V | fc22118 | 2010-10-18 15:28:16 +0530 | [diff] [blame] | 1203 | return v9fs_get_xattr(ctx, path, name, value, size); |
Aneesh Kumar K.V | fa32ef8 | 2010-09-02 11:09:06 +0530 | [diff] [blame] | 1204 | } |
| 1205 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1206 | static ssize_t local_llistxattr(FsContext *ctx, V9fsPath *fs_path, |
Aneesh Kumar K.V | fa32ef8 | 2010-09-02 11:09:06 +0530 | [diff] [blame] | 1207 | void *value, size_t size) |
| 1208 | { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1209 | char *path = fs_path->data; |
| 1210 | |
Aneesh Kumar K.V | fc22118 | 2010-10-18 15:28:16 +0530 | [diff] [blame] | 1211 | return v9fs_list_xattr(ctx, path, value, size); |
Aneesh Kumar K.V | fa32ef8 | 2010-09-02 11:09:06 +0530 | [diff] [blame] | 1212 | } |
| 1213 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1214 | static int local_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name, |
Aneesh Kumar K.V | 10b468b | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 1215 | void *value, size_t size, int flags) |
| 1216 | { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1217 | char *path = fs_path->data; |
| 1218 | |
Aneesh Kumar K.V | fc22118 | 2010-10-18 15:28:16 +0530 | [diff] [blame] | 1219 | return v9fs_set_xattr(ctx, path, name, value, size, flags); |
Aneesh Kumar K.V | 10b468b | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 1220 | } |
| 1221 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1222 | static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path, |
| 1223 | const char *name) |
Aneesh Kumar K.V | 9ed3ef2 | 2010-08-26 11:15:23 +0530 | [diff] [blame] | 1224 | { |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1225 | char *path = fs_path->data; |
| 1226 | |
Aneesh Kumar K.V | fc22118 | 2010-10-18 15:28:16 +0530 | [diff] [blame] | 1227 | return v9fs_remove_xattr(ctx, path, name); |
Aneesh Kumar K.V | 9ed3ef2 | 2010-08-26 11:15:23 +0530 | [diff] [blame] | 1228 | } |
| 1229 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1230 | static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 1231 | const char *name, V9fsPath *target) |
| 1232 | { |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 1233 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1234 | local_is_mapped_file_metadata(ctx, name)) { |
| 1235 | errno = EINVAL; |
| 1236 | return -1; |
| 1237 | } |
| 1238 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1239 | if (dir_path) { |
Greg Kurz | f57f587 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 1240 | if (!strcmp(name, ".")) { |
| 1241 | /* "." relative to "foo/bar" is "foo/bar" */ |
| 1242 | v9fs_path_copy(target, dir_path); |
| 1243 | } else if (!strcmp(name, "..")) { |
| 1244 | if (!strcmp(dir_path->data, ".")) { |
| 1245 | /* ".." relative to the root is "." */ |
| 1246 | v9fs_path_sprintf(target, "."); |
| 1247 | } else { |
| 1248 | char *tmp = g_path_get_dirname(dir_path->data); |
| 1249 | /* Symbolic links are resolved by the client. We can assume |
| 1250 | * that ".." relative to "foo/bar" is equivalent to "foo" |
| 1251 | */ |
| 1252 | v9fs_path_sprintf(target, "%s", tmp); |
| 1253 | g_free(tmp); |
| 1254 | } |
| 1255 | } else { |
| 1256 | assert(!strchr(name, '/')); |
| 1257 | v9fs_path_sprintf(target, "%s/%s", dir_path->data, name); |
| 1258 | } |
| 1259 | } else if (!strcmp(name, "/") || !strcmp(name, ".") || |
| 1260 | !strcmp(name, "..")) { |
| 1261 | /* This is the root fid */ |
| 1262 | v9fs_path_sprintf(target, "."); |
Greg Kurz | 9c6b899 | 2017-04-17 10:53:23 +0200 | [diff] [blame] | 1263 | } else { |
Greg Kurz | f57f587 | 2017-05-25 10:30:14 +0200 | [diff] [blame] | 1264 | assert(!strchr(name, '/')); |
| 1265 | v9fs_path_sprintf(target, "./%s", name); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1266 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1267 | return 0; |
| 1268 | } |
| 1269 | |
| 1270 | static int local_renameat(FsContext *ctx, V9fsPath *olddir, |
| 1271 | const char *old_name, V9fsPath *newdir, |
| 1272 | const char *new_name) |
| 1273 | { |
| 1274 | int ret; |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1275 | int odirfd, ndirfd; |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1276 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 1277 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1278 | (local_is_mapped_file_metadata(ctx, old_name) || |
| 1279 | local_is_mapped_file_metadata(ctx, new_name))) { |
| 1280 | errno = EINVAL; |
| 1281 | return -1; |
| 1282 | } |
| 1283 | |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1284 | odirfd = local_opendir_nofollow(ctx, olddir->data); |
| 1285 | if (odirfd == -1) { |
| 1286 | return -1; |
| 1287 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1288 | |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1289 | ndirfd = local_opendir_nofollow(ctx, newdir->data); |
| 1290 | if (ndirfd == -1) { |
| 1291 | close_preserve_errno(odirfd); |
| 1292 | return -1; |
| 1293 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1294 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1295 | ret = qemu_renameat(odirfd, old_name, ndirfd, new_name); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1296 | if (ret < 0) { |
| 1297 | goto out; |
| 1298 | } |
| 1299 | |
| 1300 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1301 | int omap_dirfd, nmap_dirfd; |
| 1302 | |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1303 | ret = qemu_mkdirat(ndirfd, VIRTFS_META_DIR, 0700); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1304 | if (ret < 0 && errno != EEXIST) { |
| 1305 | goto err_undo_rename; |
| 1306 | } |
| 1307 | |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 1308 | omap_dirfd = openat_dir(odirfd, VIRTFS_META_DIR); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1309 | if (omap_dirfd == -1) { |
| 1310 | goto err; |
| 1311 | } |
| 1312 | |
Greg Kurz | 6dd4b1f | 2017-02-26 23:44:11 +0100 | [diff] [blame] | 1313 | nmap_dirfd = openat_dir(ndirfd, VIRTFS_META_DIR); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1314 | if (nmap_dirfd == -1) { |
| 1315 | close_preserve_errno(omap_dirfd); |
| 1316 | goto err; |
| 1317 | } |
| 1318 | |
| 1319 | /* rename the .virtfs_metadata files */ |
Bin Meng | 6ca60cd | 2022-12-19 18:20:07 +0800 | [diff] [blame] | 1320 | ret = qemu_renameat(omap_dirfd, old_name, nmap_dirfd, new_name); |
Greg Kurz | 99f2cf4 | 2017-02-26 23:43:55 +0100 | [diff] [blame] | 1321 | close_preserve_errno(nmap_dirfd); |
| 1322 | close_preserve_errno(omap_dirfd); |
| 1323 | if (ret < 0 && errno != ENOENT) { |
| 1324 | goto err_undo_rename; |
| 1325 | } |
| 1326 | |
| 1327 | ret = 0; |
| 1328 | } |
| 1329 | goto out; |
| 1330 | |
| 1331 | err: |
| 1332 | ret = -1; |
| 1333 | err_undo_rename: |
| 1334 | renameat_preserve_errno(ndirfd, new_name, odirfd, old_name); |
| 1335 | out: |
| 1336 | close_preserve_errno(ndirfd); |
| 1337 | close_preserve_errno(odirfd); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1338 | return ret; |
| 1339 | } |
| 1340 | |
Greg Kurz | d2767ed | 2017-02-26 23:44:03 +0100 | [diff] [blame] | 1341 | static void v9fs_path_init_dirname(V9fsPath *path, const char *str) |
| 1342 | { |
| 1343 | path->data = g_path_get_dirname(str); |
| 1344 | path->size = strlen(path->data) + 1; |
| 1345 | } |
| 1346 | |
| 1347 | static int local_rename(FsContext *ctx, const char *oldpath, |
| 1348 | const char *newpath) |
| 1349 | { |
| 1350 | int err; |
| 1351 | char *oname = g_path_get_basename(oldpath); |
| 1352 | char *nname = g_path_get_basename(newpath); |
| 1353 | V9fsPath olddir, newdir; |
| 1354 | |
| 1355 | v9fs_path_init_dirname(&olddir, oldpath); |
| 1356 | v9fs_path_init_dirname(&newdir, newpath); |
| 1357 | |
| 1358 | err = local_renameat(ctx, &olddir, oname, &newdir, nname); |
| 1359 | |
| 1360 | v9fs_path_free(&newdir); |
| 1361 | v9fs_path_free(&olddir); |
| 1362 | g_free(nname); |
| 1363 | g_free(oname); |
| 1364 | |
| 1365 | return err; |
| 1366 | } |
| 1367 | |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1368 | static int local_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 1369 | const char *name, int flags) |
| 1370 | { |
| 1371 | int ret; |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1372 | int dirfd; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1373 | |
Greg Kurz | 7a95434 | 2017-05-05 14:48:08 +0200 | [diff] [blame] | 1374 | if (ctx->export_flags & V9FS_SM_MAPPED_FILE && |
| 1375 | local_is_mapped_file_metadata(ctx, name)) { |
| 1376 | errno = EINVAL; |
| 1377 | return -1; |
| 1378 | } |
| 1379 | |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1380 | dirfd = local_opendir_nofollow(ctx, dir->data); |
| 1381 | if (dirfd == -1) { |
| 1382 | return -1; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1383 | } |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1384 | |
Greg Kurz | df4938a | 2017-02-26 23:43:00 +0100 | [diff] [blame] | 1385 | ret = local_unlinkat_common(ctx, dirfd, name, flags); |
| 1386 | close_preserve_errno(dirfd); |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1387 | return ret; |
| 1388 | } |
Aneesh Kumar K.V | 9ed3ef2 | 2010-08-26 11:15:23 +0530 | [diff] [blame] | 1389 | |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1390 | #ifdef FS_IOC_GETVERSION |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1391 | static int local_ioc_getversion(FsContext *ctx, V9fsPath *path, |
| 1392 | mode_t st_mode, uint64_t *st_gen) |
| 1393 | { |
Kirill A. Shutemov | 0e5fc99 | 2014-01-28 17:08:24 +0200 | [diff] [blame] | 1394 | int err; |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 1395 | V9fsFidOpenState fid_open; |
| 1396 | |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1397 | /* |
| 1398 | * Do not try to open special files like device nodes, fifos etc |
| 1399 | * We can get fd for regular files and directories only |
| 1400 | */ |
| 1401 | if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) { |
Kirill A. Shutemov | 1a9978a | 2014-01-28 17:08:26 +0200 | [diff] [blame] | 1402 | errno = ENOTTY; |
| 1403 | return -1; |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1404 | } |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 1405 | err = local_open(ctx, path, O_RDONLY, &fid_open); |
| 1406 | if (err < 0) { |
| 1407 | return err; |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1408 | } |
Aneesh Kumar K.V | cc720dd | 2011-10-25 12:10:40 +0530 | [diff] [blame] | 1409 | err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen); |
| 1410 | local_close(ctx, &fid_open); |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1411 | return err; |
| 1412 | } |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1413 | #endif |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1414 | |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1415 | static int local_ioc_getversion_init(FsContext *ctx, LocalData *data, Error **errp) |
Aneesh Kumar K.V | 0174fe7 | 2011-08-02 11:35:54 +0530 | [diff] [blame] | 1416 | { |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1417 | #ifdef FS_IOC_GETVERSION |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1418 | struct statfs stbuf; |
| 1419 | |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1420 | /* |
Michael Tokarev | 28cbbdd | 2023-07-14 14:13:50 +0300 | [diff] [blame] | 1421 | * use ioc_getversion only if the ioctl is defined |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1422 | */ |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 1423 | if (fstatfs(data->mountfd, &stbuf) < 0) { |
Keno Fischer | 2306271 | 2018-06-07 12:17:21 +0200 | [diff] [blame] | 1424 | error_setg_errno(errp, errno, |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1425 | "failed to stat file system at '%s'", ctx->fs_root); |
| 1426 | return -1; |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1427 | } |
| 1428 | switch (stbuf.f_type) { |
| 1429 | case EXT2_SUPER_MAGIC: |
| 1430 | case BTRFS_SUPER_MAGIC: |
| 1431 | case REISERFS_SUPER_MAGIC: |
| 1432 | case XFS_SUPER_MAGIC: |
| 1433 | ctx->exops.get_st_gen = local_ioc_getversion; |
| 1434 | break; |
| 1435 | } |
| 1436 | #endif |
Keno Fischer | 5b7b2f9 | 2018-06-07 12:17:22 +0200 | [diff] [blame] | 1437 | return 0; |
| 1438 | } |
| 1439 | |
| 1440 | static int local_init(FsContext *ctx, Error **errp) |
| 1441 | { |
| 1442 | LocalData *data = g_malloc(sizeof(*data)); |
| 1443 | |
| 1444 | data->mountfd = open(ctx->fs_root, O_DIRECTORY | O_RDONLY); |
| 1445 | if (data->mountfd == -1) { |
| 1446 | error_setg_errno(errp, errno, "failed to open '%s'", ctx->fs_root); |
| 1447 | goto err; |
| 1448 | } |
| 1449 | |
| 1450 | if (local_ioc_getversion_init(ctx, data, errp) < 0) { |
| 1451 | close(data->mountfd); |
| 1452 | goto err; |
| 1453 | } |
Harsh Prateek Bora | e06a765 | 2011-10-12 19:11:25 +0530 | [diff] [blame] | 1454 | |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1455 | if (ctx->export_flags & V9FS_SM_PASSTHROUGH) { |
| 1456 | ctx->xops = passthrough_xattr_ops; |
| 1457 | } else if (ctx->export_flags & V9FS_SM_MAPPED) { |
| 1458 | ctx->xops = mapped_xattr_ops; |
| 1459 | } else if (ctx->export_flags & V9FS_SM_NONE) { |
| 1460 | ctx->xops = none_xattr_ops; |
| 1461 | } else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1462 | /* |
| 1463 | * xattr operation for mapped-file and passthrough |
| 1464 | * remain same. |
| 1465 | */ |
| 1466 | ctx->xops = passthrough_xattr_ops; |
| 1467 | } |
Aneesh Kumar K.V | c98f1d4 | 2011-10-12 20:59:18 +0530 | [diff] [blame] | 1468 | ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT; |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1469 | |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 1470 | ctx->private = data; |
Greg Kurz | 00c90bd | 2017-02-26 23:41:48 +0100 | [diff] [blame] | 1471 | return 0; |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 1472 | |
| 1473 | err: |
| 1474 | g_free(data); |
| 1475 | return -1; |
| 1476 | } |
| 1477 | |
| 1478 | static void local_cleanup(FsContext *ctx) |
| 1479 | { |
| 1480 | LocalData *data = ctx->private; |
| 1481 | |
Greg Kurz | c0da0cb | 2019-10-10 11:36:04 +0200 | [diff] [blame] | 1482 | if (!data) { |
| 1483 | return; |
| 1484 | } |
| 1485 | |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 1486 | close(data->mountfd); |
| 1487 | g_free(data); |
Aneesh Kumar K.V | 0174fe7 | 2011-08-02 11:35:54 +0530 | [diff] [blame] | 1488 | } |
| 1489 | |
Vladimir Sementsov-Ogievskiy | 4c5ec47 | 2019-12-05 20:46:22 +0300 | [diff] [blame] | 1490 | static void error_append_security_model_hint(Error *const *errp) |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1491 | { |
| 1492 | error_append_hint(errp, "Valid options are: security_model=" |
| 1493 | "[passthrough|mapped-xattr|mapped-file|none]\n"); |
| 1494 | } |
| 1495 | |
| 1496 | static int local_parse_opts(QemuOpts *opts, FsDriverEntry *fse, Error **errp) |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1497 | { |
Vladimir Sementsov-Ogievskiy | 92c4512 | 2020-07-07 18:50:35 +0200 | [diff] [blame] | 1498 | ERRP_GUARD(); |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1499 | const char *sec_model = qemu_opt_get(opts, "security_model"); |
| 1500 | const char *path = qemu_opt_get(opts, "path"); |
Antonios Motakis | 1a6ed33 | 2019-10-10 11:36:05 +0200 | [diff] [blame] | 1501 | const char *multidevs = qemu_opt_get(opts, "multidevs"); |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1502 | |
| 1503 | if (!sec_model) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1504 | error_setg(errp, "security_model property not set"); |
| 1505 | error_append_security_model_hint(errp); |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1506 | return -1; |
| 1507 | } |
| 1508 | |
| 1509 | if (!strcmp(sec_model, "passthrough")) { |
| 1510 | fse->export_flags |= V9FS_SM_PASSTHROUGH; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1511 | } else if (!strcmp(sec_model, "mapped") || |
| 1512 | !strcmp(sec_model, "mapped-xattr")) { |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1513 | fse->export_flags |= V9FS_SM_MAPPED; |
| 1514 | } else if (!strcmp(sec_model, "none")) { |
| 1515 | fse->export_flags |= V9FS_SM_NONE; |
Aneesh Kumar K.V | 2c30dd7 | 2012-01-19 12:21:11 +0530 | [diff] [blame] | 1516 | } else if (!strcmp(sec_model, "mapped-file")) { |
| 1517 | fse->export_flags |= V9FS_SM_MAPPED_FILE; |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1518 | } else { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1519 | error_setg(errp, "invalid security_model property '%s'", sec_model); |
| 1520 | error_append_security_model_hint(errp); |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1521 | return -1; |
| 1522 | } |
| 1523 | |
Antonios Motakis | 1a6ed33 | 2019-10-10 11:36:05 +0200 | [diff] [blame] | 1524 | if (multidevs) { |
| 1525 | if (!strcmp(multidevs, "remap")) { |
| 1526 | fse->export_flags &= ~V9FS_FORBID_MULTIDEVS; |
| 1527 | fse->export_flags |= V9FS_REMAP_INODES; |
| 1528 | } else if (!strcmp(multidevs, "forbid")) { |
| 1529 | fse->export_flags &= ~V9FS_REMAP_INODES; |
| 1530 | fse->export_flags |= V9FS_FORBID_MULTIDEVS; |
| 1531 | } else if (!strcmp(multidevs, "warn")) { |
| 1532 | fse->export_flags &= ~V9FS_FORBID_MULTIDEVS; |
| 1533 | fse->export_flags &= ~V9FS_REMAP_INODES; |
| 1534 | } else { |
Vladimir Sementsov-Ogievskiy | 92c4512 | 2020-07-07 18:50:35 +0200 | [diff] [blame] | 1535 | error_setg(errp, "invalid multidevs property '%s'", |
Antonios Motakis | 1a6ed33 | 2019-10-10 11:36:05 +0200 | [diff] [blame] | 1536 | multidevs); |
Vladimir Sementsov-Ogievskiy | 92c4512 | 2020-07-07 18:50:35 +0200 | [diff] [blame] | 1537 | error_append_hint(errp, "Valid options are: multidevs=" |
Antonios Motakis | 1a6ed33 | 2019-10-10 11:36:05 +0200 | [diff] [blame] | 1538 | "[remap|forbid|warn]\n"); |
Antonios Motakis | 1a6ed33 | 2019-10-10 11:36:05 +0200 | [diff] [blame] | 1539 | return -1; |
| 1540 | } |
| 1541 | } |
| 1542 | |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1543 | if (!path) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1544 | error_setg(errp, "path property not set"); |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1545 | return -1; |
| 1546 | } |
Pradeep Jagadeesh | b8bbdb8 | 2017-02-28 10:31:46 +0100 | [diff] [blame] | 1547 | |
Vladimir Sementsov-Ogievskiy | 92c4512 | 2020-07-07 18:50:35 +0200 | [diff] [blame] | 1548 | if (fsdev_throttle_parse_opts(opts, &fse->fst, errp)) { |
| 1549 | error_prepend(errp, "invalid throttle configuration: "); |
Pradeep Jagadeesh | b8bbdb8 | 2017-02-28 10:31:46 +0100 | [diff] [blame] | 1550 | return -1; |
| 1551 | } |
| 1552 | |
Tobias Schramm | b96feb2 | 2017-06-29 15:11:50 +0200 | [diff] [blame] | 1553 | if (fse->export_flags & V9FS_SM_MAPPED || |
| 1554 | fse->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1555 | fse->fmode = |
| 1556 | qemu_opt_get_number(opts, "fmode", SM_LOCAL_MODE_BITS) & 0777; |
| 1557 | fse->dmode = |
| 1558 | qemu_opt_get_number(opts, "dmode", SM_LOCAL_DIR_MODE_BITS) & 0777; |
| 1559 | } else { |
| 1560 | if (qemu_opt_find(opts, "fmode")) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1561 | error_setg(errp, "fmode is only valid for mapped security modes"); |
Tobias Schramm | b96feb2 | 2017-06-29 15:11:50 +0200 | [diff] [blame] | 1562 | return -1; |
| 1563 | } |
| 1564 | if (qemu_opt_find(opts, "dmode")) { |
Greg Kurz | 91cda4e | 2018-01-08 11:18:23 +0100 | [diff] [blame] | 1565 | error_setg(errp, "dmode is only valid for mapped security modes"); |
Tobias Schramm | b96feb2 | 2017-06-29 15:11:50 +0200 | [diff] [blame] | 1566 | return -1; |
| 1567 | } |
| 1568 | } |
| 1569 | |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1570 | fse->path = g_strdup(path); |
| 1571 | |
| 1572 | return 0; |
| 1573 | } |
| 1574 | |
Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 1575 | FileOperations local_ops = { |
Aneesh Kumar K.V | 99519f0 | 2011-12-14 13:48:59 +0530 | [diff] [blame] | 1576 | .parse_opts = local_parse_opts, |
Aneesh Kumar K.V | 0174fe7 | 2011-08-02 11:35:54 +0530 | [diff] [blame] | 1577 | .init = local_init, |
Greg Kurz | 0e35a37 | 2017-02-26 23:42:10 +0100 | [diff] [blame] | 1578 | .cleanup = local_cleanup, |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 1579 | .lstat = local_lstat, |
Anthony Liguori | 131dcb2 | 2010-04-29 17:44:47 +0530 | [diff] [blame] | 1580 | .readlink = local_readlink, |
| 1581 | .close = local_close, |
| 1582 | .closedir = local_closedir, |
Anthony Liguori | a6568fe | 2010-04-29 17:44:55 +0530 | [diff] [blame] | 1583 | .open = local_open, |
| 1584 | .opendir = local_opendir, |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 1585 | .rewinddir = local_rewinddir, |
| 1586 | .telldir = local_telldir, |
Greg Kurz | 635324e | 2016-06-06 11:52:34 +0200 | [diff] [blame] | 1587 | .readdir = local_readdir, |
Anthony Liguori | a923155 | 2010-04-29 17:44:56 +0530 | [diff] [blame] | 1588 | .seekdir = local_seekdir, |
Sanchit Garg | 56d15a5 | 2010-10-08 11:30:16 +0530 | [diff] [blame] | 1589 | .preadv = local_preadv, |
| 1590 | .pwritev = local_pwritev, |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 1591 | .chmod = local_chmod, |
| 1592 | .mknod = local_mknod, |
Anthony Liguori | c494dd6 | 2010-04-29 17:44:59 +0530 | [diff] [blame] | 1593 | .mkdir = local_mkdir, |
| 1594 | .fstat = local_fstat, |
| 1595 | .open2 = local_open2, |
| 1596 | .symlink = local_symlink, |
| 1597 | .link = local_link, |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1598 | .truncate = local_truncate, |
| 1599 | .rename = local_rename, |
| 1600 | .chown = local_chown, |
M. Mohan Kumar | 74bc02b | 2010-06-09 19:14:38 +0530 | [diff] [blame] | 1601 | .utimensat = local_utimensat, |
Anthony Liguori | 5bae190 | 2010-04-29 17:45:01 +0530 | [diff] [blame] | 1602 | .remove = local_remove, |
Anthony Liguori | 8cf89e0 | 2010-04-29 17:45:00 +0530 | [diff] [blame] | 1603 | .fsync = local_fsync, |
M. Mohan Kumar | be940c8 | 2010-05-10 12:11:03 +0530 | [diff] [blame] | 1604 | .statfs = local_statfs, |
Aneesh Kumar K.V | fa32ef8 | 2010-09-02 11:09:06 +0530 | [diff] [blame] | 1605 | .lgetxattr = local_lgetxattr, |
| 1606 | .llistxattr = local_llistxattr, |
Aneesh Kumar K.V | 10b468b | 2010-09-02 11:09:07 +0530 | [diff] [blame] | 1607 | .lsetxattr = local_lsetxattr, |
Aneesh Kumar K.V | 9ed3ef2 | 2010-08-26 11:15:23 +0530 | [diff] [blame] | 1608 | .lremovexattr = local_lremovexattr, |
Aneesh Kumar K.V | 2289be1 | 2011-09-09 15:14:18 +0530 | [diff] [blame] | 1609 | .name_to_path = local_name_to_path, |
| 1610 | .renameat = local_renameat, |
| 1611 | .unlinkat = local_unlinkat, |
Anthony Liguori | 9f10751 | 2010-04-29 17:44:44 +0530 | [diff] [blame] | 1612 | }; |