| /* |
| * Block driver for RAW files (posix) |
| * |
| * Copyright (c) 2006 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| #include "qemu-common.h" |
| #include "qemu-timer.h" |
| #include "qemu-char.h" |
| #include "qemu-log.h" |
| #include "block_int.h" |
| #include "module.h" |
| #include "block/raw-posix-aio.h" |
| |
| #ifdef CONFIG_COCOA |
| #include <paths.h> |
| #include <sys/param.h> |
| #include <IOKit/IOKitLib.h> |
| #include <IOKit/IOBSD.h> |
| #include <IOKit/storage/IOMediaBSDClient.h> |
| #include <IOKit/storage/IOMedia.h> |
| #include <IOKit/storage/IOCDMedia.h> |
| //#include <IOKit/storage/IOCDTypes.h> |
| #include <CoreFoundation/CoreFoundation.h> |
| #endif |
| |
| #ifdef __sun__ |
| #define _POSIX_PTHREAD_SEMANTICS 1 |
| #include <signal.h> |
| #include <sys/dkio.h> |
| #endif |
| #ifdef __linux__ |
| #include <sys/ioctl.h> |
| #include <linux/cdrom.h> |
| #include <linux/fd.h> |
| #endif |
| #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
| #include <signal.h> |
| #include <sys/disk.h> |
| #include <sys/cdio.h> |
| #endif |
| |
| #ifdef __OpenBSD__ |
| #include <sys/ioctl.h> |
| #include <sys/disklabel.h> |
| #include <sys/dkio.h> |
| #endif |
| |
| #ifdef __DragonFly__ |
| #include <sys/ioctl.h> |
| #include <sys/diskslice.h> |
| #endif |
| |
| //#define DEBUG_FLOPPY |
| |
| //#define DEBUG_BLOCK |
| #if defined(DEBUG_BLOCK) |
| #define DEBUG_BLOCK_PRINT(formatCstr, ...) do { if (qemu_log_enabled()) \ |
| { qemu_log(formatCstr, ## __VA_ARGS__); qemu_log_flush(); } } while (0) |
| #else |
| #define DEBUG_BLOCK_PRINT(formatCstr, ...) |
| #endif |
| |
| /* OS X does not have O_DSYNC */ |
| #ifndef O_DSYNC |
| #ifdef O_SYNC |
| #define O_DSYNC O_SYNC |
| #elif defined(O_FSYNC) |
| #define O_DSYNC O_FSYNC |
| #endif |
| #endif |
| |
| /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */ |
| #ifndef O_DIRECT |
| #define O_DIRECT O_DSYNC |
| #endif |
| |
| #define FTYPE_FILE 0 |
| #define FTYPE_CD 1 |
| #define FTYPE_FD 2 |
| |
| #define ALIGNED_BUFFER_SIZE (32 * 512) |
| |
| /* if the FD is not accessed during that time (in ms), we try to |
| reopen it to see if the disk has been changed */ |
| #define FD_OPEN_TIMEOUT 1000 |
| |
| typedef struct BDRVRawState { |
| int fd; |
| int type; |
| unsigned int lseek_err_cnt; |
| int open_flags; |
| #if defined(__linux__) |
| /* linux floppy specific */ |
| int64_t fd_open_time; |
| int64_t fd_error_time; |
| int fd_got_error; |
| int fd_media_changed; |
| #endif |
| #ifdef CONFIG_LINUX_AIO |
| int use_aio; |
| void *aio_ctx; |
| #endif |
| uint8_t* aligned_buf; |
| } BDRVRawState; |
| |
| static int fd_open(BlockDriverState *bs); |
| static int64_t raw_getlength(BlockDriverState *bs); |
| |
| #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| static int cdrom_reopen(BlockDriverState *bs); |
| #endif |
| |
| static int raw_open_common(BlockDriverState *bs, const char *filename, |
| int bdrv_flags, int open_flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| int fd, ret; |
| |
| s->lseek_err_cnt = 0; |
| |
| s->open_flags = open_flags | O_BINARY; |
| s->open_flags &= ~O_ACCMODE; |
| if ((bdrv_flags & BDRV_O_ACCESS) == BDRV_O_RDWR) { |
| s->open_flags |= O_RDWR; |
| } else { |
| s->open_flags |= O_RDONLY; |
| bs->read_only = 1; |
| } |
| |
| /* Use O_DSYNC for write-through caching, no flags for write-back caching, |
| * and O_DIRECT for no caching. */ |
| if ((bdrv_flags & BDRV_O_NOCACHE)) |
| s->open_flags |= O_DIRECT; |
| else if (!(bdrv_flags & BDRV_O_CACHE_WB)) |
| s->open_flags |= O_DSYNC; |
| |
| s->fd = -1; |
| fd = qemu_open(filename, s->open_flags, 0644); |
| if (fd < 0) { |
| ret = -errno; |
| if (ret == -EROFS) |
| ret = -EACCES; |
| return ret; |
| } |
| s->fd = fd; |
| s->aligned_buf = NULL; |
| |
| if ((bdrv_flags & BDRV_O_NOCACHE)) { |
| s->aligned_buf = qemu_blockalign(bs, ALIGNED_BUFFER_SIZE); |
| if (s->aligned_buf == NULL) { |
| goto out_close; |
| } |
| } |
| |
| #ifdef CONFIG_LINUX_AIO |
| if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) == |
| (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) { |
| |
| /* We're falling back to POSIX AIO in some cases */ |
| paio_init(); |
| |
| s->aio_ctx = laio_init(); |
| if (!s->aio_ctx) { |
| goto out_free_buf; |
| } |
| s->use_aio = 1; |
| } else |
| #endif |
| { |
| if (paio_init() < 0) { |
| goto out_free_buf; |
| } |
| #ifdef CONFIG_LINUX_AIO |
| s->use_aio = 0; |
| #endif |
| } |
| |
| return 0; |
| |
| out_free_buf: |
| qemu_vfree(s->aligned_buf); |
| out_close: |
| close(fd); |
| return -errno; |
| } |
| |
| static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| int open_flags = 0; |
| |
| s->type = FTYPE_FILE; |
| if (flags & BDRV_O_CREAT) |
| open_flags = O_CREAT | O_TRUNC; |
| |
| return raw_open_common(bs, filename, flags, open_flags); |
| } |
| |
| /* XXX: use host sector size if necessary with: |
| #ifdef DIOCGSECTORSIZE |
| { |
| unsigned int sectorsize = 512; |
| if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) && |
| sectorsize > bufsize) |
| bufsize = sectorsize; |
| } |
| #endif |
| #ifdef CONFIG_COCOA |
| u_int32_t blockSize = 512; |
| if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) { |
| bufsize = blockSize; |
| } |
| #endif |
| */ |
| |
| /* |
| * offset and count are in bytes, but must be multiples of 512 for files |
| * opened with O_DIRECT. buf must be aligned to 512 bytes then. |
| * |
| * This function may be called without alignment if the caller ensures |
| * that O_DIRECT is not in effect. |
| */ |
| static int raw_pread_aligned(BlockDriverState *bs, int64_t offset, |
| uint8_t *buf, int count) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| ret = fd_open(bs); |
| if (ret < 0) |
| return ret; |
| |
| if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
| ++(s->lseek_err_cnt); |
| if(s->lseek_err_cnt <= 10) { |
| DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| "] lseek failed : %d = %s\n", |
| s->fd, bs->filename, offset, buf, count, |
| bs->total_sectors, errno, strerror(errno)); |
| } |
| return -1; |
| } |
| s->lseek_err_cnt=0; |
| |
| ret = read(s->fd, buf, count); |
| if (ret == count) |
| goto label__raw_read__success; |
| |
| /* Allow reads beyond the end (needed for pwrite) */ |
| if ((ret == 0) && bs->growable) { |
| int64_t size = raw_getlength(bs); |
| if (offset >= size) { |
| memset(buf, 0, count); |
| ret = count; |
| goto label__raw_read__success; |
| } |
| } |
| |
| DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| "] read failed %d : %d = %s\n", |
| s->fd, bs->filename, offset, buf, count, |
| bs->total_sectors, ret, errno, strerror(errno)); |
| |
| /* Try harder for CDrom. */ |
| if (bs->type == BDRV_TYPE_CDROM) { |
| lseek(s->fd, offset, SEEK_SET); |
| ret = read(s->fd, buf, count); |
| if (ret == count) |
| goto label__raw_read__success; |
| lseek(s->fd, offset, SEEK_SET); |
| ret = read(s->fd, buf, count); |
| if (ret == count) |
| goto label__raw_read__success; |
| |
| DEBUG_BLOCK_PRINT("raw_pread(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| "] retry read failed %d : %d = %s\n", |
| s->fd, bs->filename, offset, buf, count, |
| bs->total_sectors, ret, errno, strerror(errno)); |
| } |
| |
| label__raw_read__success: |
| |
| return (ret < 0) ? -errno : ret; |
| } |
| |
| /* |
| * offset and count are in bytes, but must be multiples of 512 for files |
| * opened with O_DIRECT. buf must be aligned to 512 bytes then. |
| * |
| * This function may be called without alignment if the caller ensures |
| * that O_DIRECT is not in effect. |
| */ |
| static int raw_pwrite_aligned(BlockDriverState *bs, int64_t offset, |
| const uint8_t *buf, int count) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| ret = fd_open(bs); |
| if (ret < 0) |
| return -errno; |
| |
| if (offset >= 0 && lseek(s->fd, offset, SEEK_SET) == (off_t)-1) { |
| ++(s->lseek_err_cnt); |
| if(s->lseek_err_cnt) { |
| DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" |
| PRId64 "] lseek failed : %d = %s\n", |
| s->fd, bs->filename, offset, buf, count, |
| bs->total_sectors, errno, strerror(errno)); |
| } |
| return -EIO; |
| } |
| s->lseek_err_cnt = 0; |
| |
| ret = write(s->fd, buf, count); |
| if (ret == count) |
| goto label__raw_write__success; |
| |
| DEBUG_BLOCK_PRINT("raw_pwrite(%d:%s, %" PRId64 ", %p, %d) [%" PRId64 |
| "] write failed %d : %d = %s\n", |
| s->fd, bs->filename, offset, buf, count, |
| bs->total_sectors, ret, errno, strerror(errno)); |
| |
| label__raw_write__success: |
| |
| return (ret < 0) ? -errno : ret; |
| } |
| |
| |
| /* |
| * offset and count are in bytes and possibly not aligned. For files opened |
| * with O_DIRECT, necessary alignments are ensured before calling |
| * raw_pread_aligned to do the actual read. |
| */ |
| static int raw_pread(BlockDriverState *bs, int64_t offset, |
| uint8_t *buf, int count) |
| { |
| BDRVRawState *s = bs->opaque; |
| int size, ret, shift, sum; |
| |
| sum = 0; |
| |
| if (s->aligned_buf != NULL) { |
| |
| if (offset & 0x1ff) { |
| /* align offset on a 512 bytes boundary */ |
| |
| shift = offset & 0x1ff; |
| size = (shift + count + 0x1ff) & ~0x1ff; |
| if (size > ALIGNED_BUFFER_SIZE) |
| size = ALIGNED_BUFFER_SIZE; |
| ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, size); |
| if (ret < 0) |
| return ret; |
| |
| size = 512 - shift; |
| if (size > count) |
| size = count; |
| memcpy(buf, s->aligned_buf + shift, size); |
| |
| buf += size; |
| offset += size; |
| count -= size; |
| sum += size; |
| |
| if (count == 0) |
| return sum; |
| } |
| if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
| |
| /* read on aligned buffer */ |
| |
| while (count) { |
| |
| size = (count + 0x1ff) & ~0x1ff; |
| if (size > ALIGNED_BUFFER_SIZE) |
| size = ALIGNED_BUFFER_SIZE; |
| |
| ret = raw_pread_aligned(bs, offset, s->aligned_buf, size); |
| if (ret < 0) |
| return ret; |
| |
| size = ret; |
| if (size > count) |
| size = count; |
| |
| memcpy(buf, s->aligned_buf, size); |
| |
| buf += size; |
| offset += size; |
| count -= size; |
| sum += size; |
| } |
| |
| return sum; |
| } |
| } |
| |
| return raw_pread_aligned(bs, offset, buf, count) + sum; |
| } |
| |
| static int raw_read(BlockDriverState *bs, int64_t sector_num, |
| uint8_t *buf, int nb_sectors) |
| { |
| int ret; |
| |
| ret = raw_pread(bs, sector_num * 512, buf, nb_sectors * 512); |
| if (ret == (nb_sectors * 512)) |
| ret = 0; |
| return ret; |
| } |
| |
| /* |
| * offset and count are in bytes and possibly not aligned. For files opened |
| * with O_DIRECT, necessary alignments are ensured before calling |
| * raw_pwrite_aligned to do the actual write. |
| */ |
| static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
| const uint8_t *buf, int count) |
| { |
| BDRVRawState *s = bs->opaque; |
| int size, ret, shift, sum; |
| |
| sum = 0; |
| |
| if (s->aligned_buf != NULL) { |
| |
| if (offset & 0x1ff) { |
| /* align offset on a 512 bytes boundary */ |
| shift = offset & 0x1ff; |
| ret = raw_pread_aligned(bs, offset - shift, s->aligned_buf, 512); |
| if (ret < 0) |
| return ret; |
| |
| size = 512 - shift; |
| if (size > count) |
| size = count; |
| memcpy(s->aligned_buf + shift, buf, size); |
| |
| ret = raw_pwrite_aligned(bs, offset - shift, s->aligned_buf, 512); |
| if (ret < 0) |
| return ret; |
| |
| buf += size; |
| offset += size; |
| count -= size; |
| sum += size; |
| |
| if (count == 0) |
| return sum; |
| } |
| if (count & 0x1ff || (uintptr_t) buf & 0x1ff) { |
| |
| while ((size = (count & ~0x1ff)) != 0) { |
| |
| if (size > ALIGNED_BUFFER_SIZE) |
| size = ALIGNED_BUFFER_SIZE; |
| |
| memcpy(s->aligned_buf, buf, size); |
| |
| ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, size); |
| if (ret < 0) |
| return ret; |
| |
| buf += ret; |
| offset += ret; |
| count -= ret; |
| sum += ret; |
| } |
| /* here, count < 512 because (count & ~0x1ff) == 0 */ |
| if (count) { |
| ret = raw_pread_aligned(bs, offset, s->aligned_buf, 512); |
| if (ret < 0) |
| return ret; |
| memcpy(s->aligned_buf, buf, count); |
| |
| ret = raw_pwrite_aligned(bs, offset, s->aligned_buf, 512); |
| if (ret < 0) |
| return ret; |
| if (count < ret) |
| ret = count; |
| |
| sum += ret; |
| } |
| return sum; |
| } |
| } |
| return raw_pwrite_aligned(bs, offset, buf, count) + sum; |
| } |
| |
| static int raw_write(BlockDriverState *bs, int64_t sector_num, |
| const uint8_t *buf, int nb_sectors) |
| { |
| int ret; |
| ret = raw_pwrite(bs, sector_num * 512, buf, nb_sectors * 512); |
| if (ret == (nb_sectors * 512)) |
| ret = 0; |
| return ret; |
| } |
| |
| /* |
| * Check if all memory in this vector is sector aligned. |
| */ |
| static int qiov_is_aligned(QEMUIOVector *qiov) |
| { |
| int i; |
| |
| for (i = 0; i < qiov->niov; i++) { |
| if ((uintptr_t) qiov->iov[i].iov_base % 512) { |
| return 0; |
| } |
| } |
| |
| return 1; |
| } |
| |
| static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs, |
| int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| BlockDriverCompletionFunc *cb, void *opaque, int type) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (fd_open(bs) < 0) |
| return NULL; |
| |
| /* |
| * If O_DIRECT is used the buffer needs to be aligned on a sector |
| * boundary. Check if this is the case or telll the low-level |
| * driver that it needs to copy the buffer. |
| */ |
| if (s->aligned_buf) { |
| if (!qiov_is_aligned(qiov)) { |
| type |= QEMU_AIO_MISALIGNED; |
| #ifdef CONFIG_LINUX_AIO |
| } else if (s->use_aio) { |
| return laio_submit(bs, s->aio_ctx, s->fd, sector_num, qiov, |
| nb_sectors, cb, opaque, type); |
| #endif |
| } |
| } |
| |
| return paio_submit(bs, s->fd, sector_num, qiov, nb_sectors, |
| cb, opaque, type); |
| } |
| |
| static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs, |
| int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
| cb, opaque, QEMU_AIO_READ); |
| } |
| |
| static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs, |
| int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| return raw_aio_submit(bs, sector_num, qiov, nb_sectors, |
| cb, opaque, QEMU_AIO_WRITE); |
| } |
| |
| static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (fd_open(bs) < 0) |
| return NULL; |
| |
| return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH); |
| } |
| |
| static void raw_close(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| if (s->fd >= 0) { |
| close(s->fd); |
| s->fd = -1; |
| if (s->aligned_buf != NULL) |
| qemu_free(s->aligned_buf); |
| } |
| } |
| |
| static int raw_truncate(BlockDriverState *bs, int64_t offset) |
| { |
| BDRVRawState *s = bs->opaque; |
| if (s->type != FTYPE_FILE) |
| return -ENOTSUP; |
| if (ftruncate(s->fd, offset) < 0) |
| return -errno; |
| return 0; |
| } |
| |
| #ifdef __OpenBSD__ |
| static int64_t raw_getlength(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int fd = s->fd; |
| struct stat st; |
| |
| if (fstat(fd, &st)) |
| return -1; |
| if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) { |
| struct disklabel dl; |
| |
| if (ioctl(fd, DIOCGDINFO, &dl)) |
| return -1; |
| return (uint64_t)dl.d_secsize * |
| dl.d_partitions[DISKPART(st.st_rdev)].p_size; |
| } else |
| return st.st_size; |
| } |
| #else /* !__OpenBSD__ */ |
| static int64_t raw_getlength(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int fd = s->fd; |
| int64_t size; |
| #ifdef CONFIG_BSD |
| struct stat sb; |
| #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
| int reopened = 0; |
| #endif |
| #endif |
| #ifdef __sun__ |
| struct dk_minfo minfo; |
| int rv; |
| #endif |
| int ret; |
| |
| ret = fd_open(bs); |
| if (ret < 0) |
| return ret; |
| |
| #ifdef CONFIG_BSD |
| #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
| again: |
| #endif |
| if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) { |
| #ifdef DIOCGMEDIASIZE |
| if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size)) |
| #elif defined(DIOCGPART) |
| { |
| struct partinfo pi; |
| if (ioctl(fd, DIOCGPART, &pi) == 0) |
| size = pi.media_size; |
| else |
| size = 0; |
| } |
| if (size == 0) |
| #endif |
| #ifdef CONFIG_COCOA |
| size = LONG_LONG_MAX; |
| #else |
| size = lseek(fd, 0LL, SEEK_END); |
| #endif |
| #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| switch(s->type) { |
| case FTYPE_CD: |
| /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */ |
| if (size == 2048LL * (unsigned)-1) |
| size = 0; |
| /* XXX no disc? maybe we need to reopen... */ |
| if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) { |
| reopened = 1; |
| goto again; |
| } |
| } |
| #endif |
| } else |
| #endif |
| #ifdef __sun__ |
| /* |
| * use the DKIOCGMEDIAINFO ioctl to read the size. |
| */ |
| rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
| if ( rv != -1 ) { |
| size = minfo.dki_lbsize * minfo.dki_capacity; |
| } else /* there are reports that lseek on some devices |
| fails, but irc discussion said that contingency |
| on contingency was overkill */ |
| #endif |
| { |
| size = lseek(fd, 0, SEEK_END); |
| } |
| return size; |
| } |
| #endif |
| |
| static int raw_create(const char *filename, QEMUOptionParameter *options) |
| { |
| int fd; |
| int result = 0; |
| int64_t total_size = 0; |
| |
| /* Read out options */ |
| while (options && options->name) { |
| if (!strcmp(options->name, BLOCK_OPT_SIZE)) { |
| total_size = options->value.n / 512; |
| } |
| options++; |
| } |
| |
| fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
| 0644); |
| if (fd < 0) { |
| result = -errno; |
| } else { |
| if (ftruncate(fd, total_size * 512) != 0) { |
| result = -errno; |
| } |
| if (close(fd) != 0) { |
| result = -errno; |
| } |
| } |
| return result; |
| } |
| |
| static void raw_flush(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| qemu_fdatasync(s->fd); |
| } |
| |
| |
| static QEMUOptionParameter raw_create_options[] = { |
| { |
| .name = BLOCK_OPT_SIZE, |
| .type = OPT_SIZE, |
| .help = "Virtual disk size" |
| }, |
| { NULL } |
| }; |
| |
| static BlockDriver bdrv_raw = { |
| .format_name = "raw", |
| .instance_size = sizeof(BDRVRawState), |
| .bdrv_probe = NULL, /* no probe for protocols */ |
| .bdrv_open = raw_open, |
| .bdrv_read = raw_read, |
| .bdrv_write = raw_write, |
| .bdrv_close = raw_close, |
| .bdrv_create = raw_create, |
| .bdrv_flush = raw_flush, |
| |
| .bdrv_aio_readv = raw_aio_readv, |
| .bdrv_aio_writev = raw_aio_writev, |
| .bdrv_aio_flush = raw_aio_flush, |
| |
| .bdrv_truncate = raw_truncate, |
| .bdrv_getlength = raw_getlength, |
| |
| .create_options = raw_create_options, |
| }; |
| |
| /***********************************************/ |
| /* host device */ |
| |
| #ifdef CONFIG_COCOA |
| static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ); |
| static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
| |
| kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
| { |
| kern_return_t kernResult; |
| mach_port_t masterPort; |
| CFMutableDictionaryRef classesToMatch; |
| |
| kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
| if ( KERN_SUCCESS != kernResult ) { |
| printf( "IOMasterPort returned %d\n", kernResult ); |
| } |
| |
| classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
| if ( classesToMatch == NULL ) { |
| printf( "IOServiceMatching returned a NULL dictionary.\n" ); |
| } else { |
| CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
| } |
| kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
| if ( KERN_SUCCESS != kernResult ) |
| { |
| printf( "IOServiceGetMatchingServices returned %d\n", kernResult ); |
| } |
| |
| return kernResult; |
| } |
| |
| kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ) |
| { |
| io_object_t nextMedia; |
| kern_return_t kernResult = KERN_FAILURE; |
| *bsdPath = '\0'; |
| nextMedia = IOIteratorNext( mediaIterator ); |
| if ( nextMedia ) |
| { |
| CFTypeRef bsdPathAsCFString; |
| bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 ); |
| if ( bsdPathAsCFString ) { |
| size_t devPathLength; |
| strcpy( bsdPath, _PATH_DEV ); |
| strcat( bsdPath, "r" ); |
| devPathLength = strlen( bsdPath ); |
| if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) { |
| kernResult = KERN_SUCCESS; |
| } |
| CFRelease( bsdPathAsCFString ); |
| } |
| IOObjectRelease( nextMedia ); |
| } |
| |
| return kernResult; |
| } |
| |
| #endif |
| |
| static int hdev_probe_device(const char *filename) |
| { |
| struct stat st; |
| |
| /* allow a dedicated CD-ROM driver to match with a higher priority */ |
| if (strstart(filename, "/dev/cdrom", NULL)) |
| return 50; |
| |
| if (stat(filename, &st) >= 0 && |
| (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
| return 100; |
| } |
| |
| return 0; |
| } |
| |
| static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| #ifdef CONFIG_COCOA |
| if (strstart(filename, "/dev/cdrom", NULL)) { |
| kern_return_t kernResult; |
| io_iterator_t mediaIterator; |
| char bsdPath[ MAXPATHLEN ]; |
| int fd; |
| |
| kernResult = FindEjectableCDMedia( &mediaIterator ); |
| kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) ); |
| |
| if ( bsdPath[ 0 ] != '\0' ) { |
| strcat(bsdPath,"s0"); |
| /* some CDs don't have a partition 0 */ |
| fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
| if (fd < 0) { |
| bsdPath[strlen(bsdPath)-1] = '1'; |
| } else { |
| close(fd); |
| } |
| filename = bsdPath; |
| } |
| |
| if ( mediaIterator ) |
| IOObjectRelease( mediaIterator ); |
| } |
| #endif |
| |
| s->type = FTYPE_FILE; |
| #if defined(__linux__) |
| if (strstart(filename, "/dev/sg", NULL)) { |
| bs->sg = 1; |
| } |
| #endif |
| |
| return raw_open_common(bs, filename, flags, 0); |
| } |
| |
| #if defined(__linux__) |
| /* Note: we do not have a reliable method to detect if the floppy is |
| present. The current method is to try to open the floppy at every |
| I/O and to keep it opened during a few hundreds of ms. */ |
| static int fd_open(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int last_media_present; |
| |
| if (s->type != FTYPE_FD) |
| return 0; |
| last_media_present = (s->fd >= 0); |
| if (s->fd >= 0 && |
| (qemu_get_clock(rt_clock) - s->fd_open_time) >= FD_OPEN_TIMEOUT) { |
| close(s->fd); |
| s->fd = -1; |
| #ifdef DEBUG_FLOPPY |
| printf("Floppy closed\n"); |
| #endif |
| } |
| if (s->fd < 0) { |
| if (s->fd_got_error && |
| (qemu_get_clock(rt_clock) - s->fd_error_time) < FD_OPEN_TIMEOUT) { |
| #ifdef DEBUG_FLOPPY |
| printf("No floppy (open delayed)\n"); |
| #endif |
| return -EIO; |
| } |
| s->fd = open(bs->filename, s->open_flags & ~O_NONBLOCK); |
| if (s->fd < 0) { |
| s->fd_error_time = qemu_get_clock(rt_clock); |
| s->fd_got_error = 1; |
| if (last_media_present) |
| s->fd_media_changed = 1; |
| #ifdef DEBUG_FLOPPY |
| printf("No floppy\n"); |
| #endif |
| return -EIO; |
| } |
| #ifdef DEBUG_FLOPPY |
| printf("Floppy opened\n"); |
| #endif |
| } |
| if (!last_media_present) |
| s->fd_media_changed = 1; |
| s->fd_open_time = qemu_get_clock(rt_clock); |
| s->fd_got_error = 0; |
| return 0; |
| } |
| |
| static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| return ioctl(s->fd, req, buf); |
| } |
| |
| static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs, |
| unsigned long int req, void *buf, |
| BlockDriverCompletionFunc *cb, void *opaque) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (fd_open(bs) < 0) |
| return NULL; |
| return paio_ioctl(bs, s->fd, req, buf, cb, opaque); |
| } |
| |
| #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| static int fd_open(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| /* this is just to ensure s->fd is sane (its called by io ops) */ |
| if (s->fd >= 0) |
| return 0; |
| return -EIO; |
| } |
| #else /* !linux && !FreeBSD */ |
| |
| static int fd_open(BlockDriverState *bs) |
| { |
| return 0; |
| } |
| |
| #endif /* !linux && !FreeBSD */ |
| |
| static int hdev_create(const char *filename, QEMUOptionParameter *options) |
| { |
| int fd; |
| int ret = 0; |
| struct stat stat_buf; |
| int64_t total_size = 0; |
| |
| /* Read out options */ |
| while (options && options->name) { |
| if (!strcmp(options->name, "size")) { |
| total_size = options->value.n / 512; |
| } |
| options++; |
| } |
| |
| fd = open(filename, O_WRONLY | O_BINARY); |
| if (fd < 0) |
| return -EIO; |
| |
| if (fstat(fd, &stat_buf) < 0) |
| ret = -EIO; |
| else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) |
| ret = -EIO; |
| else if (lseek(fd, 0, SEEK_END) < total_size * 512) |
| ret = -ENOSPC; |
| |
| close(fd); |
| return ret; |
| } |
| |
| static BlockDriver bdrv_host_device = { |
| .format_name = "host_device", |
| .instance_size = sizeof(BDRVRawState), |
| .bdrv_probe_device = hdev_probe_device, |
| .bdrv_open = hdev_open, |
| .bdrv_close = raw_close, |
| .bdrv_create = hdev_create, |
| .create_options = raw_create_options, |
| .no_zero_init = 1, |
| .bdrv_flush = raw_flush, |
| |
| .bdrv_aio_readv = raw_aio_readv, |
| .bdrv_aio_writev = raw_aio_writev, |
| .bdrv_aio_flush = raw_aio_flush, |
| |
| .bdrv_read = raw_read, |
| .bdrv_write = raw_write, |
| .bdrv_getlength = raw_getlength, |
| |
| /* generic scsi device */ |
| #ifdef __linux__ |
| .bdrv_ioctl = hdev_ioctl, |
| .bdrv_aio_ioctl = hdev_aio_ioctl, |
| #endif |
| }; |
| |
| #ifdef __linux__ |
| static int floppy_open(BlockDriverState *bs, const char *filename, int flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| s->type = FTYPE_FD; |
| |
| /* open will not fail even if no floppy is inserted, so add O_NONBLOCK */ |
| ret = raw_open_common(bs, filename, flags, O_NONBLOCK); |
| if (ret) |
| return ret; |
| |
| /* close fd so that we can reopen it as needed */ |
| close(s->fd); |
| s->fd = -1; |
| s->fd_media_changed = 1; |
| |
| return 0; |
| } |
| |
| static int floppy_probe_device(const char *filename) |
| { |
| if (strstart(filename, "/dev/fd", NULL)) |
| return 100; |
| return 0; |
| } |
| |
| |
| static int floppy_is_inserted(BlockDriverState *bs) |
| { |
| return fd_open(bs) >= 0; |
| } |
| |
| static int floppy_media_changed(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| /* |
| * XXX: we do not have a true media changed indication. |
| * It does not work if the floppy is changed without trying to read it. |
| */ |
| fd_open(bs); |
| ret = s->fd_media_changed; |
| s->fd_media_changed = 0; |
| #ifdef DEBUG_FLOPPY |
| printf("Floppy changed=%d\n", ret); |
| #endif |
| return ret; |
| } |
| |
| static int floppy_eject(BlockDriverState *bs, int eject_flag) |
| { |
| BDRVRawState *s = bs->opaque; |
| int fd; |
| |
| if (s->fd >= 0) { |
| close(s->fd); |
| s->fd = -1; |
| } |
| fd = open(bs->filename, s->open_flags | O_NONBLOCK); |
| if (fd >= 0) { |
| if (ioctl(fd, FDEJECT, 0) < 0) |
| perror("FDEJECT"); |
| close(fd); |
| } |
| |
| return 0; |
| } |
| |
| static BlockDriver bdrv_host_floppy = { |
| .format_name = "host_floppy", |
| .instance_size = sizeof(BDRVRawState), |
| .bdrv_probe_device = floppy_probe_device, |
| .bdrv_open = floppy_open, |
| .bdrv_close = raw_close, |
| .bdrv_create = hdev_create, |
| .create_options = raw_create_options, |
| .no_zero_init = 1, |
| .bdrv_flush = raw_flush, |
| |
| .bdrv_aio_readv = raw_aio_readv, |
| .bdrv_aio_writev = raw_aio_writev, |
| .bdrv_aio_flush = raw_aio_flush, |
| |
| .bdrv_read = raw_read, |
| .bdrv_write = raw_write, |
| .bdrv_getlength = raw_getlength, |
| |
| /* removable device support */ |
| .bdrv_is_inserted = floppy_is_inserted, |
| .bdrv_media_changed = floppy_media_changed, |
| .bdrv_eject = floppy_eject, |
| }; |
| |
| static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| s->type = FTYPE_CD; |
| |
| /* open will not fail even if no CD is inserted, so add O_NONBLOCK */ |
| return raw_open_common(bs, filename, flags, O_NONBLOCK); |
| } |
| |
| static int cdrom_probe_device(const char *filename) |
| { |
| if (strstart(filename, "/dev/cd", NULL)) |
| return 100; |
| return 0; |
| } |
| |
| static int cdrom_is_inserted(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); |
| if (ret == CDS_DISC_OK) |
| return 1; |
| return 0; |
| } |
| |
| static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (eject_flag) { |
| if (ioctl(s->fd, CDROMEJECT, NULL) < 0) |
| perror("CDROMEJECT"); |
| } else { |
| if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0) |
| perror("CDROMEJECT"); |
| } |
| |
| return 0; |
| } |
| |
| static int cdrom_set_locked(BlockDriverState *bs, int locked) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) { |
| /* |
| * Note: an error can happen if the distribution automatically |
| * mounts the CD-ROM |
| */ |
| /* perror("CDROM_LOCKDOOR"); */ |
| } |
| |
| return 0; |
| } |
| |
| static BlockDriver bdrv_host_cdrom = { |
| .format_name = "host_cdrom", |
| .instance_size = sizeof(BDRVRawState), |
| .bdrv_probe_device = cdrom_probe_device, |
| .bdrv_open = cdrom_open, |
| .bdrv_close = raw_close, |
| .bdrv_create = hdev_create, |
| .create_options = raw_create_options, |
| .no_zero_init = 1, |
| .bdrv_flush = raw_flush, |
| |
| .bdrv_aio_readv = raw_aio_readv, |
| .bdrv_aio_writev = raw_aio_writev, |
| .bdrv_aio_flush = raw_aio_flush, |
| |
| .bdrv_read = raw_read, |
| .bdrv_write = raw_write, |
| .bdrv_getlength = raw_getlength, |
| |
| /* removable device support */ |
| .bdrv_is_inserted = cdrom_is_inserted, |
| .bdrv_eject = cdrom_eject, |
| .bdrv_set_locked = cdrom_set_locked, |
| |
| /* generic scsi device */ |
| .bdrv_ioctl = hdev_ioctl, |
| .bdrv_aio_ioctl = hdev_aio_ioctl, |
| }; |
| #endif /* __linux__ */ |
| |
| #if defined (__FreeBSD__) || defined(__FreeBSD_kernel__) |
| static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) |
| { |
| BDRVRawState *s = bs->opaque; |
| int ret; |
| |
| s->type = FTYPE_CD; |
| |
| ret = raw_open_common(bs, filename, flags, 0); |
| if (ret) |
| return ret; |
| |
| /* make sure the door isnt locked at this time */ |
| ioctl(s->fd, CDIOCALLOW); |
| return 0; |
| } |
| |
| static int cdrom_probe_device(const char *filename) |
| { |
| if (strstart(filename, "/dev/cd", NULL) || |
| strstart(filename, "/dev/acd", NULL)) |
| return 100; |
| return 0; |
| } |
| |
| static int cdrom_reopen(BlockDriverState *bs) |
| { |
| BDRVRawState *s = bs->opaque; |
| int fd; |
| |
| /* |
| * Force reread of possibly changed/newly loaded disc, |
| * FreeBSD seems to not notice sometimes... |
| */ |
| if (s->fd >= 0) |
| close(s->fd); |
| fd = open(bs->filename, s->open_flags, 0644); |
| if (fd < 0) { |
| s->fd = -1; |
| return -EIO; |
| } |
| s->fd = fd; |
| |
| /* make sure the door isnt locked at this time */ |
| ioctl(s->fd, CDIOCALLOW); |
| return 0; |
| } |
| |
| static int cdrom_is_inserted(BlockDriverState *bs) |
| { |
| return raw_getlength(bs) > 0; |
| } |
| |
| static int cdrom_eject(BlockDriverState *bs, int eject_flag) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (s->fd < 0) |
| return -ENOTSUP; |
| |
| (void) ioctl(s->fd, CDIOCALLOW); |
| |
| if (eject_flag) { |
| if (ioctl(s->fd, CDIOCEJECT) < 0) |
| perror("CDIOCEJECT"); |
| } else { |
| if (ioctl(s->fd, CDIOCCLOSE) < 0) |
| perror("CDIOCCLOSE"); |
| } |
| |
| if (cdrom_reopen(bs) < 0) |
| return -ENOTSUP; |
| return 0; |
| } |
| |
| static int cdrom_set_locked(BlockDriverState *bs, int locked) |
| { |
| BDRVRawState *s = bs->opaque; |
| |
| if (s->fd < 0) |
| return -ENOTSUP; |
| if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) { |
| /* |
| * Note: an error can happen if the distribution automatically |
| * mounts the CD-ROM |
| */ |
| /* perror("CDROM_LOCKDOOR"); */ |
| } |
| |
| return 0; |
| } |
| |
| static BlockDriver bdrv_host_cdrom = { |
| .format_name = "host_cdrom", |
| .instance_size = sizeof(BDRVRawState), |
| .bdrv_probe_device = cdrom_probe_device, |
| .bdrv_open = cdrom_open, |
| .bdrv_close = raw_close, |
| .bdrv_create = hdev_create, |
| .create_options = raw_create_options, |
| .no_zero_init = 1, |
| .bdrv_flush = raw_flush, |
| |
| .bdrv_aio_readv = raw_aio_readv, |
| .bdrv_aio_writev = raw_aio_writev, |
| .bdrv_aio_flush = raw_aio_flush, |
| |
| .bdrv_read = raw_read, |
| .bdrv_write = raw_write, |
| .bdrv_getlength = raw_getlength, |
| |
| /* removable device support */ |
| .bdrv_is_inserted = cdrom_is_inserted, |
| .bdrv_eject = cdrom_eject, |
| .bdrv_set_locked = cdrom_set_locked, |
| }; |
| #endif /* __FreeBSD__ */ |
| |
| static void bdrv_raw_init(void) |
| { |
| /* |
| * Register all the drivers. Note that order is important, the driver |
| * registered last will get probed first. |
| */ |
| bdrv_register(&bdrv_raw); |
| bdrv_register(&bdrv_host_device); |
| #ifdef __linux__ |
| bdrv_register(&bdrv_host_floppy); |
| bdrv_register(&bdrv_host_cdrom); |
| #endif |
| #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
| bdrv_register(&bdrv_host_cdrom); |
| #endif |
| } |
| |
| block_init(bdrv_raw_init); |
