diff options
Diffstat (limited to 'block-raw-posix.c')
| -rw-r--r-- | block-raw-posix.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/block-raw-posix.c b/block-raw-posix.c index 6d617bb3a..a972f80ae 100644 --- a/block-raw-posix.c +++ b/block-raw-posix.c @@ -1015,8 +1015,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags) s->fd_open_flags = open_flags; /* open will not fail even if no floppy is inserted */ open_flags |= O_NONBLOCK; +#ifdef CONFIG_AIO } else if (strstart(filename, "/dev/sg", NULL)) { bs->sg = 1; +#endif } #endif #if defined(__FreeBSD__) @@ -1207,6 +1209,7 @@ static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) return ioctl(s->fd, req, buf); } +#ifdef CONFIG_AIO static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque) @@ -1225,6 +1228,7 @@ static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs, return &acb->common; } +#endif #elif defined(__FreeBSD__) @@ -1375,11 +1379,47 @@ static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs, } #endif /* !linux && !FreeBSD */ +#if defined(__linux__) || defined(__FreeBSD__) +static int hdev_create(const char *filename, int64_t total_size, + const char *backing_file, int flags) +{ + int fd; + int ret = 0; + struct stat stat_buf; + + if (flags || backing_file) + return -ENOTSUP; + + 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)) + ret = -EIO; + else if (lseek(fd, 0, SEEK_END) < total_size * 512) + ret = -ENOSPC; + + close(fd); + return ret; +} + +#else /* !(linux || freebsd) */ + +static int hdev_create(const char *filename, int64_t total_size, + const char *backing_file, int flags) +{ + return -ENOTSUP; +} +#endif + BlockDriver bdrv_host_device = { .format_name = "host_device", .instance_size = sizeof(BDRVRawState), .bdrv_open = hdev_open, .bdrv_close = raw_close, + .bdrv_create = hdev_create, .bdrv_flush = raw_flush, #ifdef CONFIG_AIO @@ -1400,5 +1440,7 @@ BlockDriver bdrv_host_device = { .bdrv_set_locked = raw_set_locked, /* generic scsi device */ .bdrv_ioctl = raw_ioctl, +#ifdef CONFIG_AIO .bdrv_aio_ioctl = raw_aio_ioctl, +#endif }; |