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Block layer patches

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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Fri 24 Feb 2017 18:08:26 GMT
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  tests: Use opened block node for block job tests
  vvfat: Use opened node as backing file
  block: Add bdrv_new_open_driver()
  block: Factor out bdrv_open_driver()
  block: Use BlockBackend for image probing
  block: Factor out bdrv_open_child_bs()
  block: Attach bs->file only during .bdrv_open()
  block: Pass BdrvChild to bdrv_truncate()
  mirror: Resize active commit base in mirror_run()
  qcow2: Use BB for resizing in qcow2_amend_options()
  blockdev: Use BlockBackend to resize in qmp_block_resize()
  iotests: Fix another race in 030
  qemu-img: Improve documentation for PREALLOC_MODE_FALLOC
  qemu-img: Truncate before full preallocation
  qemu-img: Add tests for raw image preallocation
  qemu-img: Do not truncate before preallocation
  qemu-iotests: redirect nbd server stdout to /dev/null
  qemu-iotests: add ability to exclude certain protocols from tests
  qemu-iotests: Test 137 only supports 'file' protocol

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-02-26 12:26:37 +00:00
commit 6b4e463ff3
34 changed files with 461 additions and 168 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

265
block.c
View File

@ -588,21 +588,20 @@ BlockDriver *bdrv_probe_all(const uint8_t *buf, int buf_size,
return drv;
}
static int find_image_format(BdrvChild *file, const char *filename,
static int find_image_format(BlockBackend *file, const char *filename,
BlockDriver **pdrv, Error **errp)
{
BlockDriverState *bs = file->bs;
BlockDriver *drv;
uint8_t buf[BLOCK_PROBE_BUF_SIZE];
int ret = 0;
/* Return the raw BlockDriver * to scsi-generic devices or empty drives */
if (bdrv_is_sg(bs) || !bdrv_is_inserted(bs) || bdrv_getlength(bs) == 0) {
if (blk_is_sg(file) || !blk_is_inserted(file) || blk_getlength(file) == 0) {
*pdrv = &bdrv_raw;
return ret;
}
ret = bdrv_pread(file, 0, buf, sizeof(buf));
ret = blk_pread(file, 0, buf, sizeof(buf));
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not read image for determining its "
"format");
@ -926,6 +925,95 @@ out:
g_free(gen_node_name);
}
static int bdrv_open_driver(BlockDriverState *bs, BlockDriver *drv,
const char *node_name, QDict *options,
int open_flags, Error **errp)
{
Error *local_err = NULL;
int ret;
bdrv_assign_node_name(bs, node_name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return -EINVAL;
}
bs->drv = drv;
bs->read_only = !(bs->open_flags & BDRV_O_RDWR);
bs->opaque = g_malloc0(drv->instance_size);
if (drv->bdrv_file_open) {
assert(!drv->bdrv_needs_filename || bs->filename[0]);
ret = drv->bdrv_file_open(bs, options, open_flags, &local_err);
} else if (drv->bdrv_open) {
ret = drv->bdrv_open(bs, options, open_flags, &local_err);
} else {
ret = 0;
}
if (ret < 0) {
if (local_err) {
error_propagate(errp, local_err);
} else if (bs->filename[0]) {
error_setg_errno(errp, -ret, "Could not open '%s'", bs->filename);
} else {
error_setg_errno(errp, -ret, "Could not open image");
}
goto free_and_fail;
}
ret = refresh_total_sectors(bs, bs->total_sectors);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not refresh total sector count");
goto free_and_fail;
}
bdrv_refresh_limits(bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto free_and_fail;
}
assert(bdrv_opt_mem_align(bs) != 0);
assert(bdrv_min_mem_align(bs) != 0);
assert(is_power_of_2(bs->bl.request_alignment));
return 0;
free_and_fail:
/* FIXME Close bs first if already opened*/
g_free(bs->opaque);
bs->opaque = NULL;
bs->drv = NULL;
return ret;
}
BlockDriverState *bdrv_new_open_driver(BlockDriver *drv, const char *node_name,
int flags, Error **errp)
{
BlockDriverState *bs;
int ret;
bs = bdrv_new();
bs->open_flags = flags;
bs->explicit_options = qdict_new();
bs->options = qdict_new();
bs->opaque = NULL;
update_options_from_flags(bs->options, flags);
ret = bdrv_open_driver(bs, drv, node_name, bs->options, flags, errp);
if (ret < 0) {
QDECREF(bs->explicit_options);
QDECREF(bs->options);
bdrv_unref(bs);
return NULL;
}
return bs;
}
QemuOptsList bdrv_runtime_opts = {
.name = "bdrv_common",
.head = QTAILQ_HEAD_INITIALIZER(bdrv_runtime_opts.head),
@ -974,7 +1062,7 @@ QemuOptsList bdrv_runtime_opts = {
*
* Removes all processed options from *options.
*/
static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
QDict *options, Error **errp)
{
int ret, open_flags;
@ -1005,7 +1093,7 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
assert(drv != NULL);
if (file != NULL) {
filename = file->bs->filename;
filename = blk_bs(file)->filename;
} else {
filename = qdict_get_try_str(options, "filename");
}
@ -1020,14 +1108,6 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
trace_bdrv_open_common(bs, filename ?: "", bs->open_flags,
drv->format_name);
node_name = qemu_opt_get(opts, "node-name");
bdrv_assign_node_name(bs, node_name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail_opts;
}
bs->read_only = !(bs->open_flags & BDRV_O_RDWR);
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) {
@ -1093,62 +1173,19 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
}
pstrcpy(bs->exact_filename, sizeof(bs->exact_filename), bs->filename);
bs->drv = drv;
bs->opaque = g_malloc0(drv->instance_size);
/* Open the image, either directly or using a protocol */
open_flags = bdrv_open_flags(bs, bs->open_flags);
if (drv->bdrv_file_open) {
assert(file == NULL);
assert(!drv->bdrv_needs_filename || filename != NULL);
ret = drv->bdrv_file_open(bs, options, open_flags, &local_err);
} else {
if (file == NULL) {
error_setg(errp, "Can't use '%s' as a block driver for the "
"protocol level", drv->format_name);
ret = -EINVAL;
goto free_and_fail;
}
bs->file = file;
ret = drv->bdrv_open(bs, options, open_flags, &local_err);
}
node_name = qemu_opt_get(opts, "node-name");
assert(!drv->bdrv_file_open || file == NULL);
ret = bdrv_open_driver(bs, drv, node_name, options, open_flags, errp);
if (ret < 0) {
if (local_err) {
error_propagate(errp, local_err);
} else if (bs->filename[0]) {
error_setg_errno(errp, -ret, "Could not open '%s'", bs->filename);
} else {
error_setg_errno(errp, -ret, "Could not open image");
}
goto free_and_fail;
goto fail_opts;
}
ret = refresh_total_sectors(bs, bs->total_sectors);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not refresh total sector count");
goto free_and_fail;
}
bdrv_refresh_limits(bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto free_and_fail;
}
assert(bdrv_opt_mem_align(bs) != 0);
assert(bdrv_min_mem_align(bs) != 0);
assert(is_power_of_2(bs->bl.request_alignment));
qemu_opts_del(opts);
return 0;
free_and_fail:
bs->file = NULL;
g_free(bs->opaque);
bs->opaque = NULL;
bs->drv = NULL;
fail_opts:
qemu_opts_del(opts);
return ret;
@ -1368,7 +1405,18 @@ void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child)
}
if (child->bs->inherits_from == parent) {
child->bs->inherits_from = NULL;
BdrvChild *c;
/* Remove inherits_from only when the last reference between parent and
* child->bs goes away. */
QLIST_FOREACH(c, &parent->children, next) {
if (c != child && c->bs == child->bs) {
break;
}
}
if (c == NULL) {
child->bs->inherits_from = NULL;
}
}
bdrv_root_unref_child(child);
@ -1543,28 +1591,12 @@ free_exit:
return ret;
}
/*
* Opens a disk image whose options are given as BlockdevRef in another block
* device's options.
*
* If allow_none is true, no image will be opened if filename is false and no
* BlockdevRef is given. NULL will be returned, but errp remains unset.
*
* bdrev_key specifies the key for the image's BlockdevRef in the options QDict.
* That QDict has to be flattened; therefore, if the BlockdevRef is a QDict
* itself, all options starting with "${bdref_key}." are considered part of the
* BlockdevRef.
*
* The BlockdevRef will be removed from the options QDict.
*/
BdrvChild *bdrv_open_child(const char *filename,
QDict *options, const char *bdref_key,
BlockDriverState* parent,
const BdrvChildRole *child_role,
bool allow_none, Error **errp)
static BlockDriverState *
bdrv_open_child_bs(const char *filename, QDict *options, const char *bdref_key,
BlockDriverState *parent, const BdrvChildRole *child_role,
bool allow_none, Error **errp)
{
BdrvChild *c = NULL;
BlockDriverState *bs;
BlockDriverState *bs = NULL;
QDict *image_options;
char *bdref_key_dot;
const char *reference;
@ -1591,11 +1623,40 @@ BdrvChild *bdrv_open_child(const char *filename,
goto done;
}
c = bdrv_attach_child(parent, bs, bdref_key, child_role);
done:
qdict_del(options, bdref_key);
return c;
return bs;
}
/*
* Opens a disk image whose options are given as BlockdevRef in another block
* device's options.
*
* If allow_none is true, no image will be opened if filename is false and no
* BlockdevRef is given. NULL will be returned, but errp remains unset.
*
* bdrev_key specifies the key for the image's BlockdevRef in the options QDict.
* That QDict has to be flattened; therefore, if the BlockdevRef is a QDict
* itself, all options starting with "${bdref_key}." are considered part of the
* BlockdevRef.
*
* The BlockdevRef will be removed from the options QDict.
*/
BdrvChild *bdrv_open_child(const char *filename,
QDict *options, const char *bdref_key,
BlockDriverState *parent,
const BdrvChildRole *child_role,
bool allow_none, Error **errp)
{
BlockDriverState *bs;
bs = bdrv_open_child_bs(filename, options, bdref_key, parent, child_role,
allow_none, errp);
if (bs == NULL) {
return NULL;
}
return bdrv_attach_child(parent, bs, bdref_key, child_role);
}
static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
@ -1691,7 +1752,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
Error **errp)
{
int ret;
BdrvChild *file = NULL;
BlockBackend *file = NULL;
BlockDriverState *bs;
BlockDriver *drv = NULL;
const char *drvname;
@ -1789,13 +1850,25 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
qdict_del(options, "backing");
}
/* Open image file without format layer */
/* Open image file without format layer. This BlockBackend is only used for
* probing, the block drivers will do their own bdrv_open_child() for the
* same BDS, which is why we put the node name back into options. */
if ((flags & BDRV_O_PROTOCOL) == 0) {
file = bdrv_open_child(filename, options, "file", bs,
&child_file, true, &local_err);
BlockDriverState *file_bs;
file_bs = bdrv_open_child_bs(filename, options, "file", bs,
&child_file, true, &local_err);
if (local_err) {
goto fail;
}
if (file_bs != NULL) {
file = blk_new();
blk_insert_bs(file, file_bs);
bdrv_unref(file_bs);
qdict_put(options, "file",
qstring_from_str(bdrv_get_node_name(file_bs)));
}
}
/* Image format probing */
@ -1835,8 +1908,8 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
goto fail;
}
if (file && (bs->file != file)) {
bdrv_unref_child(bs, file);
if (file) {
blk_unref(file);
file = NULL;
}
@ -1898,8 +1971,9 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
return bs;
fail:
if (file != NULL) {
bdrv_unref_child(bs, file);
blk_unref(file);
if (bs->file != NULL) {
bdrv_unref_child(bs, bs->file);
}
QDECREF(snapshot_options);
QDECREF(bs->explicit_options);
@ -2626,8 +2700,9 @@ exit:
/**
* Truncate file to 'offset' bytes (needed only for file protocols)
*/
int bdrv_truncate(BlockDriverState *bs, int64_t offset)
int bdrv_truncate(BdrvChild *child, int64_t offset)
{
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;
int ret;
if (!drv)

2
block/blkdebug.c
View File

@ -663,7 +663,7 @@ static int64_t blkdebug_getlength(BlockDriverState *bs)
static int blkdebug_truncate(BlockDriverState *bs, int64_t offset)
{
return bdrv_truncate(bs->file->bs, offset);
return bdrv_truncate(bs->file, offset);
}
static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options)

2
block/block-backend.c
View File

@ -1605,7 +1605,7 @@ int blk_truncate(BlockBackend *blk, int64_t offset)
return -ENOMEDIUM;
}
return bdrv_truncate(blk_bs(blk), offset);
return bdrv_truncate(blk->root, offset);
}
static void blk_pdiscard_entry(void *opaque)

6
block/bochs.c
View File

@ -104,6 +104,12 @@ static int bochs_open(BlockDriverState *bs, QDict *options, int flags,
struct bochs_header bochs;
int ret;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
bs->read_only = true; /* no write support yet */
ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs));

6
block/cloop.c
View File

@ -66,6 +66,12 @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags,
uint32_t offsets_size, max_compressed_block_size = 1, i;
int ret;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
bs->read_only = true;
/* read header */

8
block/crypto.c
View File

@ -300,6 +300,12 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
QCryptoBlockOpenOptions *open_opts = NULL;
unsigned int cflags = 0;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
opts = qemu_opts_create(opts_spec, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (local_err) {
@ -383,7 +389,7 @@ static int block_crypto_truncate(BlockDriverState *bs, int64_t offset)
offset += payload_offset;
return bdrv_truncate(bs->file->bs, offset);
return bdrv_truncate(bs->file, offset);
}
static void block_crypto_close(BlockDriverState *bs)

6
block/dmg.c
View File

@ -413,6 +413,12 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
int64_t offset;
int ret;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
block_module_load_one("dmg-bz2");
bs->read_only = true;

28
block/file-posix.c
View File

@ -1591,18 +1591,17 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
#endif
}
if (ftruncate(fd, total_size) != 0) {
result = -errno;
error_setg_errno(errp, -result, "Could not resize file");
goto out_close;
}
switch (prealloc) {
#ifdef CONFIG_POSIX_FALLOCATE
case PREALLOC_MODE_FALLOC:
/* posix_fallocate() doesn't set errno. */
/*
* Truncating before posix_fallocate() makes it about twice slower on
* file systems that do not support fallocate(), trying to check if a
* block is allocated before allocating it, so don't do that here.
*/
result = -posix_fallocate(fd, 0, total_size);
if (result != 0) {
/* posix_fallocate() doesn't set errno. */
error_setg_errno(errp, -result,
"Could not preallocate data for the new file");
}
@ -1610,6 +1609,17 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
#endif
case PREALLOC_MODE_FULL:
{
/*
* Knowing the final size from the beginning could allow the file
* system driver to do less allocations and possibly avoid
* fragmentation of the file.
*/
if (ftruncate(fd, total_size) != 0) {
result = -errno;
error_setg_errno(errp, -result, "Could not resize file");
goto out_close;
}
int64_t num = 0, left = total_size;
buf = g_malloc0(65536);
@ -1636,6 +1646,10 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
break;
}
case PREALLOC_MODE_OFF:
if (ftruncate(fd, total_size) != 0) {
result = -errno;
error_setg_errno(errp, -result, "Could not resize file");
}
break;
default:
result = -EINVAL;

50
block/mirror.c
View File

@ -662,7 +662,28 @@ static void coroutine_fn mirror_run(void *opaque)
if (s->bdev_length < 0) {
ret = s->bdev_length;
goto immediate_exit;
} else if (s->bdev_length == 0) {
}
/* Active commit must resize the base image if its size differs from the
* active layer. */
if (s->base == blk_bs(s->target)) {
int64_t base_length;
base_length = blk_getlength(s->target);
if (base_length < 0) {
ret = base_length;
goto immediate_exit;
}
if (s->bdev_length > base_length) {
ret = blk_truncate(s->target, s->bdev_length);
if (ret < 0) {
goto immediate_exit;
}
}
}
if (s->bdev_length == 0) {
/* Report BLOCK_JOB_READY and wait for complete. */
block_job_event_ready(&s->common);
s->synced = true;
@ -1063,9 +1084,7 @@ void commit_active_start(const char *job_id, BlockDriverState *bs,
BlockCompletionFunc *cb, void *opaque, Error **errp,
bool auto_complete)
{
int64_t length, base_length;
int orig_base_flags;
int ret;
Error *local_err = NULL;
orig_base_flags = bdrv_get_flags(base);
@ -1074,31 +1093,6 @@ void commit_active_start(const char *job_id, BlockDriverState *bs,
return;
}
length = bdrv_getlength(bs);
if (length < 0) {
error_setg_errno(errp, -length,
"Unable to determine length of %s", bs->filename);
goto error_restore_flags;
}
base_length = bdrv_getlength(base);
if (base_length < 0) {
error_setg_errno(errp, -base_length,
"Unable to determine length of %s", base->filename);
goto error_restore_flags;
}
if (length > base_length) {
ret = bdrv_truncate(base, length);
if (ret < 0) {
error_setg_errno(errp, -ret,
"Top image %s is larger than base image %s, and "
"resize of base image failed",
bs->filename, base->filename);
goto error_restore_flags;
}
}
mirror_start_job(job_id, bs, creation_flags, base, NULL, speed, 0, 0,
MIRROR_LEAVE_BACKING_CHAIN,
on_error, on_error, true, cb, opaque, &local_err,

14
block/parallels.c
View File

@ -215,7 +215,7 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
s->data_end << BDRV_SECTOR_BITS,
space << BDRV_SECTOR_BITS, 0);
} else {
ret = bdrv_truncate(bs->file->bs,
ret = bdrv_truncate(bs->file,
(s->data_end + space) << BDRV_SECTOR_BITS);
}
if (ret < 0) {
@ -449,7 +449,7 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
size - res->image_end_offset);
res->leaks += count;
if (fix & BDRV_FIX_LEAKS) {
ret = bdrv_truncate(bs->file->bs, res->image_end_offset);
ret = bdrv_truncate(bs->file, res->image_end_offset);
if (ret < 0) {
res->check_errors++;
return ret;
@ -581,6 +581,12 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
Error *local_err = NULL;
char *buf;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph));
if (ret < 0) {
goto fail;
@ -681,7 +687,7 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
goto fail_options;
}
if (!bdrv_has_zero_init(bs->file->bs) ||
bdrv_truncate(bs->file->bs, bdrv_getlength(bs->file->bs)) != 0) {
bdrv_truncate(bs->file, bdrv_getlength(bs->file->bs)) != 0) {
s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
}
@ -724,7 +730,7 @@ static void parallels_close(BlockDriverState *bs)
}
if (bs->open_flags & BDRV_O_RDWR) {
bdrv_truncate(bs->file->bs, s->data_end << BDRV_SECTOR_BITS);
bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS);
}
g_free(s->bat_dirty_bmap);

10
block/qcow.c
View File

@ -106,6 +106,12 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
QCowHeader header;
Error *local_err = NULL;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
if (ret < 0) {
goto fail;
@ -467,7 +473,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
/* round to cluster size */
cluster_offset = (cluster_offset + s->cluster_size - 1) &
~(s->cluster_size - 1);
bdrv_truncate(bs->file->bs, cluster_offset + s->cluster_size);
bdrv_truncate(bs->file, cluster_offset + s->cluster_size);
/* if encrypted, we must initialize the cluster
content which won't be written */
if (bs->encrypted &&
@ -909,7 +915,7 @@ static int qcow_make_empty(BlockDriverState *bs)
if (bdrv_pwrite_sync(bs->file, s->l1_table_offset, s->l1_table,
l1_length) < 0)
return -1;
ret = bdrv_truncate(bs->file->bs, s->l1_table_offset + l1_length);
ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
if (ret < 0)
return ret;

2
block/qcow2-refcount.c
View File

@ -1734,7 +1734,7 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
goto resize_fail;
}
ret = bdrv_truncate(bs->file->bs, offset + s->cluster_size);
ret = bdrv_truncate(bs->file, offset + s->cluster_size);
if (ret < 0) {
goto resize_fail;
}

28
block/qcow2.c
View File

@ -814,8 +814,8 @@ static int qcow2_update_options(BlockDriverState *bs, QDict *options,
return ret;
}
static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVQcow2State *s = bs->opaque;
unsigned int len, i;
@ -1205,6 +1205,18 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
}
static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
return qcow2_do_open(bs, options, flags, errp);
}
static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
@ -1785,7 +1797,7 @@ static void qcow2_invalidate_cache(BlockDriverState *bs, Error **errp)
options = qdict_clone_shallow(bs->options);
flags &= ~BDRV_O_INACTIVE;
ret = qcow2_open(bs, options, flags, &local_err);
ret = qcow2_do_open(bs, options, flags, &local_err);
QDECREF(options);
if (local_err) {
error_propagate(errp, local_err);
@ -2570,7 +2582,7 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
/* align end of file to a sector boundary to ease reading with
sector based I/Os */
cluster_offset = bdrv_getlength(bs->file->bs);
return bdrv_truncate(bs->file->bs, cluster_offset);
return bdrv_truncate(bs->file, cluster_offset);
}
buf = qemu_blockalign(bs, s->cluster_size);
@ -2784,7 +2796,7 @@ static int make_completely_empty(BlockDriverState *bs)
goto fail;
}
ret = bdrv_truncate(bs->file->bs, (3 + l1_clusters) * s->cluster_size);
ret = bdrv_truncate(bs->file, (3 + l1_clusters) * s->cluster_size);
if (ret < 0) {
goto fail;
}
@ -3250,7 +3262,11 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
}
if (new_size) {
ret = bdrv_truncate(bs, new_size);
BlockBackend *blk = blk_new();
blk_insert_bs(blk, bs);
ret = blk_truncate(blk, new_size);
blk_unref(blk);
if (ret < 0) {
return ret;
}

18
block/qed.c
View File

@ -415,8 +415,8 @@ static void bdrv_qed_drain(BlockDriverState *bs)
}
}
static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVQEDState *s = bs->opaque;
QEDHeader le_header;
@ -550,6 +550,18 @@ out:
return ret;
}
static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
return bdrv_qed_do_open(bs, options, flags, errp);
}
static void bdrv_qed_refresh_limits(BlockDriverState *bs, Error **errp)
{
BDRVQEDState *s = bs->opaque;
@ -1629,7 +1641,7 @@ static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)
bdrv_qed_close(bs);
memset(s, 0, sizeof(BDRVQEDState));
ret = bdrv_qed_open(bs, NULL, bs->open_flags, &local_err);
ret = bdrv_qed_do_open(bs, NULL, bs->open_flags, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_prepend(errp, "Could not reopen qed layer: ");

8
block/raw-format.c
View File

@ -341,7 +341,7 @@ static int raw_truncate(BlockDriverState *bs, int64_t offset)
s->size = offset;
offset += s->offset;
return bdrv_truncate(bs->file->bs, offset);
return bdrv_truncate(bs->file, offset);
}
static int raw_media_changed(BlockDriverState *bs)
@ -384,6 +384,12 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
BDRVRawState *s = bs->opaque;
int ret;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
bs->sg = bs->file->bs->sg;
bs->supported_write_flags = BDRV_REQ_FUA &
bs->file->bs->supported_write_flags;

6
block/replication.c
View File

@ -86,6 +86,12 @@ static int replication_open(BlockDriverState *bs, QDict *options,
const char *mode;
const char *top_id;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
ret = -EINVAL;
opts = qemu_opts_create(&replication_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);

6
block/vdi.c
View File

@ -363,6 +363,12 @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags,
int ret;
Error *local_err = NULL;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
logout("\n");
ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1);

2
block/vhdx-log.c
View File

@ -548,7 +548,7 @@ static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s,
if (new_file_size % (1024*1024)) {
/* round up to nearest 1MB boundary */
new_file_size = ((new_file_size >> 20) + 1) << 20;
bdrv_truncate(bs->file->bs, new_file_size);
bdrv_truncate(bs->file, new_file_size);
}
}
qemu_vfree(desc_entries);

8
block/vhdx.c
View File

@ -898,6 +898,12 @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags,
uint64_t signature;
Error *local_err = NULL;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
s->bat = NULL;
s->first_visible_write = true;
@ -1165,7 +1171,7 @@ static int vhdx_allocate_block(BlockDriverState *bs, BDRVVHDXState *s,
/* per the spec, the address for a block is in units of 1MB */
*new_offset = ROUND_UP(*new_offset, 1024 * 1024);
return bdrv_truncate(bs->file->bs, *new_offset + s->block_size);
return bdrv_truncate(bs->file, *new_offset + s->block_size);
}
/*

6
block/vmdk.c
View File

@ -943,6 +943,12 @@ static int vmdk_open(BlockDriverState *bs, QDict *options, int flags,
uint32_t magic;
Error *local_err = NULL;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
buf = vmdk_read_desc(bs->file, 0, errp);
if (!buf) {
return -EINVAL;

6
block/vpc.c
View File

@ -220,6 +220,12 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
int disk_type = VHD_DYNAMIC;
int ret;
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
opts = qemu_opts_create(&vpc_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (local_err) {

10
block/vvfat.c
View File

@ -2968,6 +2968,7 @@ static void write_target_close(BlockDriverState *bs) {
static BlockDriver vvfat_write_target = {
.format_name = "vvfat_write_target",
.instance_size = sizeof(void*),
.bdrv_co_pwritev = write_target_commit,
.bdrv_close = write_target_close,
};
@ -3036,14 +3037,13 @@ static int enable_write_target(BlockDriverState *bs, Error **errp)
unlink(s->qcow_filename);
#endif
backing = bdrv_new();
backing = bdrv_new_open_driver(&vvfat_write_target, NULL, BDRV_O_ALLOW_RDWR,
&error_abort);
*(void**) backing->opaque = s;
bdrv_set_backing_hd(s->bs, backing);
bdrv_unref(backing);
s->bs->backing->bs->drv = &vvfat_write_target;
s->bs->backing->bs->opaque = g_new(void *, 1);
*(void**)s->bs->backing->bs->opaque = s;
return 0;
err:

7
blockdev.c
View File

@ -2858,6 +2858,7 @@ void qmp_block_resize(bool has_device, const char *device,
int64_t size, Error **errp)
{
Error *local_err = NULL;
BlockBackend *blk = NULL;
BlockDriverState *bs;
AioContext *aio_context;
int ret;
@ -2888,10 +2889,13 @@ void qmp_block_resize(bool has_device, const char *device,
goto out;
}
blk = blk_new();
blk_insert_bs(blk, bs);
/* complete all in-flight operations before resizing the device */
bdrv_drain_all();
ret = bdrv_truncate(bs, size);
ret = blk_truncate(blk, size);
switch (ret) {
case 0:
break;
@ -2913,6 +2917,7 @@ void qmp_block_resize(bool has_device, const char *device,
}
out:
blk_unref(blk);
aio_context_release(aio_context);
}

4
include/block/block.h
View File

@ -215,6 +215,8 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
const char *bdref_key, Error **errp);
BlockDriverState *bdrv_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp);
BlockDriverState *bdrv_new_open_driver(BlockDriver *drv, const char *node_name,
int flags, Error **errp);
BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
BlockDriverState *bs,
QDict *options, int flags);
@ -253,7 +255,7 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
const char *backing_file);
int bdrv_get_backing_file_depth(BlockDriverState *bs);
void bdrv_refresh_filename(BlockDriverState *bs);
int bdrv_truncate(BlockDriverState *bs, int64_t offset);
int bdrv_truncate(BdrvChild *child, int64_t offset);
int64_t bdrv_nb_sectors(BlockDriverState *bs);
int64_t bdrv_getlength(BlockDriverState *bs);
int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);

5
tests/qemu-iotests/030
View File

@ -547,11 +547,14 @@ class TestEIO(TestErrors):
while not completed:
for event in self.vm.get_qmp_events(wait=True):
if event['event'] == 'BLOCK_JOB_ERROR':
error = True
self.assert_qmp(event, 'data/device', 'drive0')
self.assert_qmp(event, 'data/operation', 'read')
result = self.vm.qmp('query-block-jobs')
if result == {'return': []}:
# Job finished too quickly
continue
self.assert_qmp(result, 'return[0]/paused', False)
error = True
elif event['event'] == 'BLOCK_JOB_COMPLETED':
self.assertTrue(error, 'job completed unexpectedly')
self.assert_qmp(event, 'data/type', 'stream')

4
tests/qemu-iotests/051.out
View File

@ -225,7 +225,7 @@ Testing: -drive driver=nbd
QEMU_PROG: -drive driver=nbd: NBD server address missing
Testing: -drive driver=raw
QEMU_PROG: -drive driver=raw: Can't use 'raw' as a block driver for the protocol level
QEMU_PROG: -drive driver=raw: A block device must be specified for "file"
Testing: -drive file.driver=file
QEMU_PROG: -drive file.driver=file: The 'file' block driver requires a file name
@ -234,7 +234,7 @@ Testing: -drive file.driver=nbd
QEMU_PROG: -drive file.driver=nbd: NBD server address missing
Testing: -drive file.driver=raw
QEMU_PROG: -drive file.driver=raw: Can't use 'raw' as a block driver for the protocol level
QEMU_PROG: -drive file.driver=raw: A block device must be specified for "file"
Testing: -drive foo=bar
QEMU_PROG: -drive foo=bar: Must specify either driver or file

4
tests/qemu-iotests/051.pc.out
View File

@ -323,7 +323,7 @@ Testing: -drive driver=nbd
QEMU_PROG: -drive driver=nbd: NBD server address missing
Testing: -drive driver=raw
QEMU_PROG: -drive driver=raw: Can't use 'raw' as a block driver for the protocol level
QEMU_PROG: -drive driver=raw: A block device must be specified for "file"
Testing: -drive file.driver=file
QEMU_PROG: -drive file.driver=file: The 'file' block driver requires a file name
@ -332,7 +332,7 @@ Testing: -drive file.driver=nbd
QEMU_PROG: -drive file.driver=nbd: NBD server address missing
Testing: -drive file.driver=raw
QEMU_PROG: -drive file.driver=raw: Can't use 'raw' as a block driver for the protocol level
QEMU_PROG: -drive file.driver=raw: A block device must be specified for "file"
Testing: -drive foo=bar
QEMU_PROG: -drive foo=bar: Must specify either driver or file

2
tests/qemu-iotests/137
View File

@ -39,7 +39,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
. ./common.qemu
_supported_fmt qcow2
_supported_proto generic
_supported_proto file
_supported_os Linux

61
tests/qemu-iotests/175 Executable file
View File

@ -0,0 +1,61 @@
#!/bin/bash
#
# Test creating raw image preallocation mode
#
# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# creator
owner=nirsof@gmail.com
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt raw
_supported_proto file
_supported_os Linux
size=1m
echo
echo "== creating image with default preallocation =="
_make_test_img $size | _filter_imgfmt
stat -c "size=%s, blocks=%b" $TEST_IMG
for mode in off full falloc; do
echo
echo "== creating image with preallocation $mode =="
IMGOPTS=preallocation=$mode _make_test_img $size | _filter_imgfmt
stat -c "size=%s, blocks=%b" $TEST_IMG
done
# success, all done
echo "*** done"
rm -f $seq.full
status=0

18
tests/qemu-iotests/175.out Normal file
View File

@ -0,0 +1,18 @@
QA output created by 175
== creating image with default preallocation ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
size=1048576, blocks=0
== creating image with preallocation off ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=off
size=1048576, blocks=0
== creating image with preallocation full ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=full
size=1048576, blocks=2048
== creating image with preallocation falloc ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=falloc
size=1048576, blocks=2048
*** done

14
tests/qemu-iotests/common.rc
View File

@ -172,7 +172,7 @@ _make_test_img()
# Start an NBD server on the image file, which is what we'll be talking to
if [ $IMGPROTO = "nbd" ]; then
eval "$QEMU_NBD -v -t -b 127.0.0.1 -p 10810 -f $IMGFMT $TEST_IMG_FILE &"
eval "$QEMU_NBD -v -t -b 127.0.0.1 -p 10810 -f $IMGFMT $TEST_IMG_FILE >/dev/null &"
sleep 1 # FIXME: qemu-nbd needs to be listening before we continue
fi
}
@ -379,6 +379,18 @@ _supported_proto()
_notrun "not suitable for this image protocol: $IMGPROTO"
}
# tests whether $IMGPROTO is specified as an unsupported image protocol for a test
#
_unsupported_proto()
{
for f; do
if [ "$f" = "$IMGPROTO" ]; then
_notrun "not suitable for this image protocol: $IMGPROTO"
return
fi
done
}
# tests whether the host OS is one of the supported OSes for a test
#
_supported_os()

1
tests/qemu-iotests/group
View File

@ -167,3 +167,4 @@
172 auto
173 rw auto
174 auto
175 auto quick

6
tests/test-blockjob-txn.c
View File

@ -96,7 +96,10 @@ static BlockJob *test_block_job_start(unsigned int iterations,
char job_id[24];
data = g_new0(TestBlockJobCBData, 1);
bs = bdrv_new();
bs = bdrv_open("null-co://", NULL, NULL, 0, &error_abort);
g_assert_nonnull(bs);
snprintf(job_id, sizeof(job_id), "job%u", counter++);
s = block_job_create(job_id, &test_block_job_driver, bs, 0,
BLOCK_JOB_DEFAULT, test_block_job_cb,
@ -242,6 +245,7 @@ static void test_pair_jobs_fail_cancel_race(void)
int main(int argc, char **argv)
{
qemu_init_main_loop(&error_abort);
bdrv_init();
g_test_init(&argc, &argv, NULL);
g_test_add_func("/single/success", test_single_job_success);

6
tests/test-blockjob.c
View File

@ -54,7 +54,10 @@ static BlockJob *do_test_id(BlockBackend *blk, const char *id,
static BlockBackend *create_blk(const char *name)
{
BlockBackend *blk = blk_new();
BlockDriverState *bs = bdrv_new();
BlockDriverState *bs;
bs = bdrv_open("null-co://", NULL, NULL, 0, &error_abort);
g_assert_nonnull(bs);
blk_insert_bs(blk, bs);
bdrv_unref(bs);
@ -140,6 +143,7 @@ static void test_job_ids(void)
int main(int argc, char **argv)
{
qemu_init_main_loop(&error_abort);
bdrv_init();
g_test_init(&argc, &argv, NULL);
g_test_add_func("/blockjob/ids", test_job_ids);