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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
parent 6528a4c1f2 d185cf0ec6
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);