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authorAnthony Liguori <aliguori@amazon.com>2014-01-10 11:05:05 -0800
committerAnthony Liguori <aliguori@amazon.com>2014-01-10 11:05:05 -0800
commitdebe40fbc5f112672d0ab8f7f393e483304059f4 (patch)
treee7d0447fed7945171068b78af6301e188aa5ea4d /block
parentd1819762fcf5d50f30df603eb606eb31bf62e29d (diff)
parent18da7f94cdce130f2a71387de4980ffa817181a1 (diff)
Merge remote-tracking branch 'stefanha/block' into staging
* stefanha/block: commit: Remove unused check qemu-iotests: Update test cases for commit active commit: Support commit active layer block: Add commit_active_start() mirror: Move base to MirrorBlockJob mirror: Don't close target qemu-iotests: drop duplicate virtio-blk initialization failure vmdk: Allow vmdk_create to work with protocol vmdk: Check VMFS extent line field number docs: updated qemu-img man page and qemu-doc to reflect VHDX support. block: vhdx - improve error message, and .bdrv_check implementation block/iscsi: Fix compilation for libiscsi 1.4.0 (API change) qapi-schema: fix QEMU 1.8 references dataplane: replace hostmem with memory_region_find dataplane: change vring API to use VirtQueueElement vring: factor common code for error exits vring: create a common function to parse descriptors sheepdog: fix dynamic grow for running qcow2 format Message-id: 1387554416-5837-1-git-send-email-stefanha@redhat.com Signed-off-by: Anthony Liguori <aliguori@amazon.com>
Diffstat (limited to 'block')
-rw-r--r--block/commit.c8
-rw-r--r--block/iscsi.c5
-rw-r--r--block/mirror.c78
-rw-r--r--block/sheepdog.c7
-rw-r--r--block/vhdx-log.c13
-rw-r--r--block/vhdx.c22
-rw-r--r--block/vhdx.h5
-rw-r--r--block/vmdk.c173
8 files changed, 212 insertions, 99 deletions
diff --git a/block/commit.c b/block/commit.c
index d4090cbf7d..acec4ac5a8 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -198,13 +198,7 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
return;
}
- /* Once we support top == active layer, remove this check */
- if (top == bs) {
- error_setg(errp,
- "Top image as the active layer is currently unsupported");
- return;
- }
-
+ assert(top != bs);
if (top == base) {
error_setg(errp, "Invalid files for merge: top and base are the same");
return;
diff --git a/block/iscsi.c b/block/iscsi.c
index fa69408df9..294b2c6ab3 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -359,7 +359,10 @@ retry:
default:
iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba,
num_sectors * iscsilun->block_size,
- iscsilun->block_size, 0, 0, 0, 0, 0,
+ iscsilun->block_size,
+#if !defined(CONFIG_LIBISCSI_1_4) /* API change from 1.4.0 to 1.5.0 */
+ 0, 0, 0, 0, 0,
+#endif
iscsi_co_generic_cb, &iTask);
break;
}
diff --git a/block/mirror.c b/block/mirror.c
index 6dc27ad35d..2932bab27a 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -31,7 +31,8 @@ typedef struct MirrorBlockJob {
BlockJob common;
RateLimit limit;
BlockDriverState *target;
- MirrorSyncMode mode;
+ BlockDriverState *base;
+ bool is_none_mode;
BlockdevOnError on_source_error, on_target_error;
bool synced;
bool should_complete;
@@ -335,10 +336,9 @@ static void coroutine_fn mirror_run(void *opaque)
sectors_per_chunk = s->granularity >> BDRV_SECTOR_BITS;
mirror_free_init(s);
- if (s->mode != MIRROR_SYNC_MODE_NONE) {
+ if (!s->is_none_mode) {
/* First part, loop on the sectors and initialize the dirty bitmap. */
- BlockDriverState *base;
- base = s->mode == MIRROR_SYNC_MODE_FULL ? NULL : bs->backing_hd;
+ BlockDriverState *base = s->base;
for (sector_num = 0; sector_num < end; ) {
int64_t next = (sector_num | (sectors_per_chunk - 1)) + 1;
ret = bdrv_is_allocated_above(bs, base,
@@ -481,8 +481,14 @@ immediate_exit:
bdrv_reopen(s->target, bdrv_get_flags(s->common.bs), NULL);
}
bdrv_swap(s->target, s->common.bs);
+ if (s->common.driver->job_type == BLOCK_JOB_TYPE_COMMIT) {
+ /* drop the bs loop chain formed by the swap: break the loop then
+ * trigger the unref from the top one */
+ BlockDriverState *p = s->base->backing_hd;
+ s->base->backing_hd = NULL;
+ bdrv_unref(p);
+ }
}
- bdrv_close(s->target);
bdrv_unref(s->target);
block_job_completed(&s->common, ret);
}
@@ -536,12 +542,24 @@ static const BlockJobDriver mirror_job_driver = {
.complete = mirror_complete,
};
-void mirror_start(BlockDriverState *bs, BlockDriverState *target,
- int64_t speed, int64_t granularity, int64_t buf_size,
- MirrorSyncMode mode, BlockdevOnError on_source_error,
- BlockdevOnError on_target_error,
- BlockDriverCompletionFunc *cb,
- void *opaque, Error **errp)
+static const BlockJobDriver commit_active_job_driver = {
+ .instance_size = sizeof(MirrorBlockJob),
+ .job_type = BLOCK_JOB_TYPE_COMMIT,
+ .set_speed = mirror_set_speed,
+ .iostatus_reset
+ = mirror_iostatus_reset,
+ .complete = mirror_complete,
+};
+
+static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
+ int64_t speed, int64_t granularity,
+ int64_t buf_size,
+ BlockdevOnError on_source_error,
+ BlockdevOnError on_target_error,
+ BlockDriverCompletionFunc *cb,
+ void *opaque, Error **errp,
+ const BlockJobDriver *driver,
+ bool is_none_mode, BlockDriverState *base)
{
MirrorBlockJob *s;
@@ -566,7 +584,8 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target,
return;
}
- s = block_job_create(&mirror_job_driver, bs, speed, cb, opaque, errp);
+
+ s = block_job_create(driver, bs, speed, cb, opaque, errp);
if (!s) {
return;
}
@@ -574,7 +593,8 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target,
s->on_source_error = on_source_error;
s->on_target_error = on_target_error;
s->target = target;
- s->mode = mode;
+ s->is_none_mode = is_none_mode;
+ s->base = base;
s->granularity = granularity;
s->buf_size = MAX(buf_size, granularity);
@@ -586,3 +606,35 @@ void mirror_start(BlockDriverState *bs, BlockDriverState *target,
trace_mirror_start(bs, s, s->common.co, opaque);
qemu_coroutine_enter(s->common.co, s);
}
+
+void mirror_start(BlockDriverState *bs, BlockDriverState *target,
+ int64_t speed, int64_t granularity, int64_t buf_size,
+ MirrorSyncMode mode, BlockdevOnError on_source_error,
+ BlockdevOnError on_target_error,
+ BlockDriverCompletionFunc *cb,
+ void *opaque, Error **errp)
+{
+ bool is_none_mode;
+ BlockDriverState *base;
+
+ is_none_mode = mode == MIRROR_SYNC_MODE_NONE;
+ base = mode == MIRROR_SYNC_MODE_TOP ? bs->backing_hd : NULL;
+ mirror_start_job(bs, target, speed, granularity, buf_size,
+ on_source_error, on_target_error, cb, opaque, errp,
+ &mirror_job_driver, is_none_mode, base);
+}
+
+void commit_active_start(BlockDriverState *bs, BlockDriverState *base,
+ int64_t speed,
+ BlockdevOnError on_error,
+ BlockDriverCompletionFunc *cb,
+ void *opaque, Error **errp)
+{
+ if (bdrv_reopen(base, bs->open_flags, errp)) {
+ return;
+ }
+ bdrv_ref(base);
+ mirror_start_job(bs, base, speed, 0, 0,
+ on_error, on_error, cb, opaque, errp,
+ &commit_active_job_driver, false, base);
+}
diff --git a/block/sheepdog.c b/block/sheepdog.c
index d1c812df3d..ba451a97a4 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -2048,13 +2048,14 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,
{
SheepdogAIOCB *acb;
int ret;
+ int64_t offset = (sector_num + nb_sectors) * BDRV_SECTOR_SIZE;
+ BDRVSheepdogState *s = bs->opaque;
- if (bs->growable && sector_num + nb_sectors > bs->total_sectors) {
- ret = sd_truncate(bs, (sector_num + nb_sectors) * BDRV_SECTOR_SIZE);
+ if (bs->growable && offset > s->inode.vdi_size) {
+ ret = sd_truncate(bs, offset);
if (ret < 0) {
return ret;
}
- bs->total_sectors = sector_num + nb_sectors;
}
acb = sd_aio_setup(bs, qiov, sector_num, nb_sectors);
diff --git a/block/vhdx-log.c b/block/vhdx-log.c
index ee5583c309..8c9ae0d8e7 100644
--- a/block/vhdx-log.c
+++ b/block/vhdx-log.c
@@ -706,7 +706,8 @@ exit:
*
* If read-only, we must replay the log in RAM (or refuse to open
* a dirty VHDX file read-only) */
-int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed)
+int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed,
+ Error **errp)
{
int ret = 0;
VHDXHeader *hdr;
@@ -761,6 +762,16 @@ int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed)
}
if (logs.valid) {
+ if (bs->read_only) {
+ ret = -EPERM;
+ error_setg_errno(errp, EPERM,
+ "VHDX image file '%s' opened read-only, but "
+ "contains a log that needs to be replayed. To "
+ "replay the log, execute:\n qemu-img check -r "
+ "all '%s'",
+ bs->filename, bs->filename);
+ goto exit;
+ }
/* now flush the log */
ret = vhdx_log_flush(bs, s, &logs);
if (ret < 0) {
diff --git a/block/vhdx.c b/block/vhdx.c
index 67bbe103a1..1995778945 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -878,7 +878,6 @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags,
int ret = 0;
uint32_t i;
uint64_t signature;
- bool log_flushed = false;
s->bat = NULL;
@@ -907,7 +906,7 @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags,
goto fail;
}
- ret = vhdx_parse_log(bs, s, &log_flushed);
+ ret = vhdx_parse_log(bs, s, &s->log_replayed_on_open, errp);
if (ret < 0) {
goto fail;
}
@@ -1854,6 +1853,24 @@ exit:
return ret;
}
+/* If opened r/w, the VHDX driver will automatically replay the log,
+ * if one is present, inside the vhdx_open() call.
+ *
+ * If qemu-img check -r all is called, the image is automatically opened
+ * r/w and any log has already been replayed, so there is nothing (currently)
+ * for us to do here
+ */
+static int vhdx_check(BlockDriverState *bs, BdrvCheckResult *result,
+ BdrvCheckMode fix)
+{
+ BDRVVHDXState *s = bs->opaque;
+
+ if (s->log_replayed_on_open) {
+ result->corruptions_fixed++;
+ }
+ return 0;
+}
+
static QEMUOptionParameter vhdx_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1898,6 +1915,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_co_writev = vhdx_co_writev,
.bdrv_create = vhdx_create,
.bdrv_get_info = vhdx_get_info,
+ .bdrv_check = vhdx_check,
.create_options = vhdx_create_options,
};
diff --git a/block/vhdx.h b/block/vhdx.h
index 51183b243c..2acd7c2d19 100644
--- a/block/vhdx.h
+++ b/block/vhdx.h
@@ -394,6 +394,8 @@ typedef struct BDRVVHDXState {
Error *migration_blocker;
+ bool log_replayed_on_open;
+
QLIST_HEAD(VHDXRegionHead, VHDXRegionEntry) regions;
} BDRVVHDXState;
@@ -408,7 +410,8 @@ uint32_t vhdx_checksum_calc(uint32_t crc, uint8_t *buf, size_t size,
bool vhdx_checksum_is_valid(uint8_t *buf, size_t size, int crc_offset);
-int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed);
+int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed,
+ Error **errp);
int vhdx_log_write_and_flush(BlockDriverState *bs, BDRVVHDXState *s,
void *data, uint32_t length, uint64_t offset);
diff --git a/block/vmdk.c b/block/vmdk.c
index 0734bc200c..c6b60b4a91 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -749,9 +749,14 @@ static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
return -EINVAL;
}
} else if (!strcmp(type, "VMFS")) {
- flat_offset = 0;
+ if (ret == 4) {
+ flat_offset = 0;
+ } else {
+ error_setg(errp, "Invalid extent lines:\n%s", p);
+ return -EINVAL;
+ }
} else if (ret != 4) {
- error_setg(errp, "Invalid extent lines: \n%s", p);
+ error_setg(errp, "Invalid extent lines:\n%s", p);
return -EINVAL;
}
@@ -1447,23 +1452,33 @@ static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
}
static int vmdk_create_extent(const char *filename, int64_t filesize,
- bool flat, bool compress, bool zeroed_grain)
+ bool flat, bool compress, bool zeroed_grain,
+ Error **errp)
{
int ret, i;
- int fd = 0;
+ BlockDriverState *bs = NULL;
VMDK4Header header;
- uint32_t tmp, magic, grains, gd_size, gt_size, gt_count;
+ Error *local_err;
+ uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count;
+ uint32_t *gd_buf = NULL;
+ int gd_buf_size;
+
+ ret = bdrv_create_file(filename, NULL, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
+ }
- fd = qemu_open(filename,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
- if (fd < 0) {
- return -errno;
+ ret = bdrv_file_open(&bs, filename, NULL, BDRV_O_RDWR, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+ goto exit;
}
+
if (flat) {
- ret = ftruncate(fd, filesize);
+ ret = bdrv_truncate(bs, filesize);
if (ret < 0) {
- ret = -errno;
+ error_setg(errp, "Could not truncate file");
}
goto exit;
}
@@ -1474,24 +1489,23 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
| (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0)
| (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0);
header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0;
- header.capacity = filesize / 512;
+ header.capacity = filesize / BDRV_SECTOR_SIZE;
header.granularity = 128;
- header.num_gtes_per_gt = 512;
+ header.num_gtes_per_gt = BDRV_SECTOR_SIZE;
- grains = (filesize / 512 + header.granularity - 1) / header.granularity;
- gt_size = ((header.num_gtes_per_gt * sizeof(uint32_t)) + 511) >> 9;
- gt_count =
- (grains + header.num_gtes_per_gt - 1) / header.num_gtes_per_gt;
- gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9;
+ grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity);
+ gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t),
+ BDRV_SECTOR_SIZE);
+ gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt);
+ gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE);
header.desc_offset = 1;
header.desc_size = 20;
header.rgd_offset = header.desc_offset + header.desc_size;
- header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count);
+ header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count);
header.grain_offset =
- ((header.gd_offset + gd_size + (gt_size * gt_count) +
- header.granularity - 1) / header.granularity) *
- header.granularity;
+ ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count),
+ header.granularity);
/* swap endianness for all header fields */
header.version = cpu_to_le32(header.version);
header.flags = cpu_to_le32(header.flags);
@@ -1511,48 +1525,55 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
header.check_bytes[3] = 0xa;
/* write all the data */
- ret = qemu_write_full(fd, &magic, sizeof(magic));
- if (ret != sizeof(magic)) {
- ret = -errno;
+ ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic));
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
goto exit;
}
- ret = qemu_write_full(fd, &header, sizeof(header));
- if (ret != sizeof(header)) {
- ret = -errno;
+ ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header));
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
goto exit;
}
- ret = ftruncate(fd, le64_to_cpu(header.grain_offset) << 9);
+ ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
if (ret < 0) {
- ret = -errno;
+ error_setg(errp, "Could not truncate file");
goto exit;
}
/* write grain directory */
- lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET);
- for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_size;
+ gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE;
+ gd_buf = g_malloc0(gd_buf_size);
+ for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors;
i < gt_count; i++, tmp += gt_size) {
- ret = qemu_write_full(fd, &tmp, sizeof(tmp));
- if (ret != sizeof(tmp)) {
- ret = -errno;
- goto exit;
- }
+ gd_buf[i] = cpu_to_le32(tmp);
+ }
+ ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size);
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
+ goto exit;
}
/* write backup grain directory */
- lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET);
- for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_size;
+ for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors;
i < gt_count; i++, tmp += gt_size) {
- ret = qemu_write_full(fd, &tmp, sizeof(tmp));
- if (ret != sizeof(tmp)) {
- ret = -errno;
- goto exit;
- }
+ gd_buf[i] = cpu_to_le32(tmp);
+ }
+ ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE,
+ gd_buf, gd_buf_size);
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
+ goto exit;
}
ret = 0;
- exit:
- qemu_close(fd);
+exit:
+ if (bs) {
+ bdrv_unref(bs);
+ }
+ g_free(gd_buf);
return ret;
}
@@ -1599,7 +1620,9 @@ static int filename_decompose(const char *filename, char *path, char *prefix,
static int vmdk_create(const char *filename, QEMUOptionParameter *options,
Error **errp)
{
- int fd, idx = 0;
+ int idx = 0;
+ BlockDriverState *new_bs = NULL;
+ Error *local_err;
char *desc = NULL;
int64_t total_size = 0, filesize;
const char *adapter_type = NULL;
@@ -1616,6 +1639,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
uint32_t parent_cid = 0xffffffff;
uint32_t number_heads = 16;
bool zeroed_grain = false;
+ uint32_t desc_offset = 0, desc_len;
const char desc_template[] =
"# Disk DescriptorFile\n"
"version=1\n"
@@ -1749,7 +1773,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
path, desc_filename);
if (vmdk_create_extent(ext_filename, size,
- flat, compress, zeroed_grain)) {
+ flat, compress, zeroed_grain, errp)) {
ret = -EINVAL;
goto exit;
}
@@ -1757,7 +1781,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
/* Format description line */
snprintf(desc_line, sizeof(desc_line),
- desc_extent_line, size / 512, desc_filename);
+ desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename);
g_string_append(ext_desc_lines, desc_line);
}
/* generate descriptor file */
@@ -1768,36 +1792,43 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
parent_desc_line,
ext_desc_lines->str,
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
- total_size / (int64_t)(63 * number_heads * 512),
+ total_size /
+ (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE),
number_heads,
adapter_type);
- if (split || flat) {
- fd = qemu_open(filename,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
+ desc_len = strlen(desc);
+ /* the descriptor offset = 0x200 */
+ if (!split && !flat) {
+ desc_offset = 0x200;
} else {
- fd = qemu_open(filename,
- O_WRONLY | O_BINARY | O_LARGEFILE,
- 0644);
+ ret = bdrv_create_file(filename, options, &local_err);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not create image file");
+ goto exit;
+ }
}
- if (fd < 0) {
- ret = -errno;
+ ret = bdrv_file_open(&new_bs, filename, NULL, BDRV_O_RDWR, &local_err);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not write description");
goto exit;
}
- /* the descriptor offset = 0x200 */
- if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) {
- ret = -errno;
- goto close_exit;
+ ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not write description");
+ goto exit;
}
- ret = qemu_write_full(fd, desc, strlen(desc));
- if (ret != strlen(desc)) {
- ret = -errno;
- goto close_exit;
+ /* bdrv_pwrite write padding zeros to align to sector, we don't need that
+ * for description file */
+ if (desc_offset == 0) {
+ ret = bdrv_truncate(new_bs, desc_len);
+ if (ret < 0) {
+ error_setg(errp, "Could not truncate file");
+ }
}
- ret = 0;
-close_exit:
- qemu_close(fd);
exit:
+ if (new_bs) {
+ bdrv_unref(new_bs);
+ }
g_free(desc);
g_string_free(ext_desc_lines, true);
return ret;