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-rw-r--r--block.c150
-rw-r--r--block/block-backend.c2
-rw-r--r--block/commit.c4
-rw-r--r--block/parallels.c2
-rw-r--r--block/qcow.c2
-rw-r--r--block/qcow2-cache.c14
-rw-r--r--block/qcow2-cluster.c76
-rw-r--r--block/qcow2-refcount.c76
-rw-r--r--block/qcow2-snapshot.c20
-rw-r--r--block/qcow2.c486
-rw-r--r--block/qcow2.h26
-rw-r--r--block/qed.c2
-rw-r--r--block/sheepdog.c5
-rw-r--r--block/vdi.c2
-rw-r--r--block/vhdx.c2
-rw-r--r--block/vmdk.c15
-rw-r--r--block/vpc.c2
-rw-r--r--block/vvfat.c8
-rw-r--r--blockdev.c72
-rw-r--r--include/block/block.h9
-rw-r--r--qemu-io-cmds.c90
-rw-r--r--qemu-io.c1
-rwxr-xr-xtests/qemu-iotests/03927
-rw-r--r--tests/qemu-iotests/039.out18
-rwxr-xr-xtests/qemu-iotests/137145
-rw-r--r--tests/qemu-iotests/137.out42
-rwxr-xr-xtests/qemu-iotests/13873
-rw-r--r--tests/qemu-iotests/138.out9
-rw-r--r--tests/qemu-iotests/group2
29 files changed, 973 insertions, 409 deletions
diff --git a/block.c b/block.c
index cb5d7aebe6..6268e37afb 100644
--- a/block.c
+++ b/block.c
@@ -85,8 +85,7 @@ static QLIST_HEAD(, BlockDriver) bdrv_drivers =
static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags,
BlockDriverState *parent,
- const BdrvChildRole *child_role,
- BlockDriver *drv, Error **errp);
+ const BdrvChildRole *child_role, Error **errp);
static void bdrv_dirty_bitmap_truncate(BlockDriverState *bs);
/* If non-zero, use only whitelisted block drivers */
@@ -314,13 +313,6 @@ static int bdrv_is_whitelisted(BlockDriver *drv, bool read_only)
return 0;
}
-BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
- bool read_only)
-{
- BlockDriver *drv = bdrv_find_format(format_name);
- return drv && bdrv_is_whitelisted(drv, read_only) ? drv : NULL;
-}
-
typedef struct CreateCo {
BlockDriver *drv;
char *filename;
@@ -997,13 +989,13 @@ static QDict *parse_json_filename(const char *filename, Error **errp)
* block driver has been specified explicitly.
*/
static int bdrv_fill_options(QDict **options, const char **pfilename,
- int *flags, BlockDriver *drv, Error **errp)
+ int *flags, Error **errp)
{
const char *filename = *pfilename;
const char *drvname;
bool protocol = *flags & BDRV_O_PROTOCOL;
bool parse_filename = false;
- BlockDriver *tmp_drv;
+ BlockDriver *drv = NULL;
Error *local_err = NULL;
/* Parse json: pseudo-protocol */
@@ -1022,15 +1014,15 @@ static int bdrv_fill_options(QDict **options, const char **pfilename,
}
drvname = qdict_get_try_str(*options, "driver");
-
- /* If the user has explicitly specified the driver, this choice should
- * override the BDRV_O_PROTOCOL flag */
- tmp_drv = drv;
- if (!tmp_drv && drvname) {
- tmp_drv = bdrv_find_format(drvname);
- }
- if (tmp_drv) {
- protocol = tmp_drv->bdrv_file_open;
+ if (drvname) {
+ drv = bdrv_find_format(drvname);
+ if (!drv) {
+ error_setg(errp, "Unknown driver '%s'", drvname);
+ return -ENOENT;
+ }
+ /* If the user has explicitly specified the driver, this choice should
+ * override the BDRV_O_PROTOCOL flag */
+ protocol = drv->bdrv_file_open;
}
if (protocol) {
@@ -1054,33 +1046,18 @@ static int bdrv_fill_options(QDict **options, const char **pfilename,
/* Find the right block driver */
filename = qdict_get_try_str(*options, "filename");
- if (drv) {
- if (drvname) {
- error_setg(errp, "Driver specified twice");
- return -EINVAL;
- }
- drvname = drv->format_name;
- qdict_put(*options, "driver", qstring_from_str(drvname));
- } else {
- if (!drvname && protocol) {
- if (filename) {
- drv = bdrv_find_protocol(filename, parse_filename, errp);
- if (!drv) {
- return -EINVAL;
- }
-
- drvname = drv->format_name;
- qdict_put(*options, "driver", qstring_from_str(drvname));
- } else {
- error_setg(errp, "Must specify either driver or file");
- return -EINVAL;
- }
- } else if (drvname) {
- drv = bdrv_find_format(drvname);
+ if (!drvname && protocol) {
+ if (filename) {
+ drv = bdrv_find_protocol(filename, parse_filename, errp);
if (!drv) {
- error_setg(errp, "Unknown driver '%s'", drvname);
- return -ENOENT;
+ return -EINVAL;
}
+
+ drvname = drv->format_name;
+ qdict_put(*options, "driver", qstring_from_str(drvname));
+ } else {
+ error_setg(errp, "Must specify either driver or file");
+ return -EINVAL;
}
}
@@ -1227,8 +1204,7 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp)
assert(bs->backing_hd == NULL);
ret = bdrv_open_inherit(&backing_hd,
*backing_filename ? backing_filename : NULL,
- NULL, options, 0, bs, &child_backing,
- NULL, &local_err);
+ NULL, options, 0, bs, &child_backing, &local_err);
if (ret < 0) {
bdrv_unref(backing_hd);
backing_hd = NULL;
@@ -1291,7 +1267,7 @@ BdrvChild *bdrv_open_child(const char *filename,
bs = NULL;
ret = bdrv_open_inherit(&bs, filename, reference, image_options, 0,
- parent, child_role, NULL, errp);
+ parent, child_role, errp);
if (ret < 0) {
goto done;
}
@@ -1385,11 +1361,13 @@ int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
qstring_from_str("file"));
qdict_put(snapshot_options, "file.filename",
qstring_from_str(tmp_filename));
+ qdict_put(snapshot_options, "driver",
+ qstring_from_str("qcow2"));
bs_snapshot = bdrv_new();
ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options,
- flags, &bdrv_qcow2, &local_err);
+ flags, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
@@ -1420,11 +1398,11 @@ out:
static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
const char *reference, QDict *options, int flags,
BlockDriverState *parent,
- const BdrvChildRole *child_role,
- BlockDriver *drv, Error **errp)
+ const BdrvChildRole *child_role, Error **errp)
{
int ret;
BlockDriverState *file = NULL, *bs;
+ BlockDriver *drv = NULL;
const char *drvname;
Error *local_err = NULL;
int snapshot_flags = 0;
@@ -1474,13 +1452,12 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
flags = child_role->inherit_flags(parent->open_flags);
}
- ret = bdrv_fill_options(&options, &filename, &flags, drv, &local_err);
+ ret = bdrv_fill_options(&options, &filename, &flags, &local_err);
if (local_err) {
goto fail;
}
/* Find the right image format driver */
- drv = NULL;
drvname = qdict_get_try_str(options, "driver");
if (drvname) {
drv = bdrv_find_format(drvname);
@@ -1635,11 +1612,10 @@ close_and_fail:
}
int bdrv_open(BlockDriverState **pbs, const char *filename,
- const char *reference, QDict *options, int flags,
- BlockDriver *drv, Error **errp)
+ const char *reference, QDict *options, int flags, Error **errp)
{
return bdrv_open_inherit(pbs, filename, reference, options, flags, NULL,
- NULL, drv, errp);
+ NULL, errp);
}
typedef struct BlockReopenQueueEntry {
@@ -1660,6 +1636,9 @@ typedef struct BlockReopenQueueEntry {
*
* bs is the BlockDriverState to add to the reopen queue.
*
+ * options contains the changed options for the associated bs
+ * (the BlockReopenQueue takes ownership)
+ *
* flags contains the open flags for the associated bs
*
* returns a pointer to bs_queue, which is either the newly allocated
@@ -1667,18 +1646,28 @@ typedef struct BlockReopenQueueEntry {
*
*/
BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
- BlockDriverState *bs, int flags)
+ BlockDriverState *bs,
+ QDict *options, int flags)
{
assert(bs != NULL);
BlockReopenQueueEntry *bs_entry;
BdrvChild *child;
+ QDict *old_options;
if (bs_queue == NULL) {
bs_queue = g_new0(BlockReopenQueue, 1);
QSIMPLEQ_INIT(bs_queue);
}
+ if (!options) {
+ options = qdict_new();
+ }
+
+ old_options = qdict_clone_shallow(bs->options);
+ qdict_join(options, old_options, false);
+ QDECREF(old_options);
+
/* bdrv_open() masks this flag out */
flags &= ~BDRV_O_PROTOCOL;
@@ -1690,13 +1679,15 @@ BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
}
child_flags = child->role->inherit_flags(flags);
- bdrv_reopen_queue(bs_queue, child->bs, child_flags);
+ /* TODO Pass down child flags (backing.*, extents.*, ...) */
+ bdrv_reopen_queue(bs_queue, child->bs, NULL, child_flags);
}
bs_entry = g_new0(BlockReopenQueueEntry, 1);
QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
bs_entry->state.bs = bs;
+ bs_entry->state.options = options;
bs_entry->state.flags = flags;
return bs_queue;
@@ -1749,6 +1740,7 @@ cleanup:
if (ret && bs_entry->prepared) {
bdrv_reopen_abort(&bs_entry->state);
}
+ QDECREF(bs_entry->state.options);
g_free(bs_entry);
}
g_free(bs_queue);
@@ -1761,7 +1753,7 @@ int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp)
{
int ret = -1;
Error *local_err = NULL;
- BlockReopenQueue *queue = bdrv_reopen_queue(NULL, bs, bdrv_flags);
+ BlockReopenQueue *queue = bdrv_reopen_queue(NULL, bs, NULL, bdrv_flags);
ret = bdrv_reopen_multiple(queue, &local_err);
if (local_err != NULL) {
@@ -1837,6 +1829,26 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
goto error;
}
+ /* Options that are not handled are only okay if they are unchanged
+ * compared to the old state. It is expected that some options are only
+ * used for the initial open, but not reopen (e.g. filename) */
+ if (qdict_size(reopen_state->options)) {
+ const QDictEntry *entry = qdict_first(reopen_state->options);
+
+ do {
+ QString *new_obj = qobject_to_qstring(entry->value);
+ const char *new = qstring_get_str(new_obj);
+ const char *old = qdict_get_try_str(reopen_state->bs->options,
+ entry->key);
+
+ if (!old || strcmp(new, old)) {
+ error_setg(errp, "Cannot change the option '%s'", entry->key);
+ ret = -EINVAL;
+ goto error;
+ }
+ } while ((entry = qdict_next(reopen_state->options, entry)));
+ }
+
ret = 0;
error:
@@ -3739,7 +3751,6 @@ void bdrv_img_create(const char *filename, const char *fmt,
const char *backing_fmt, *backing_file;
int64_t size;
BlockDriver *drv, *proto_drv;
- BlockDriver *backing_drv = NULL;
Error *local_err = NULL;
int ret = 0;
@@ -3813,14 +3824,6 @@ void bdrv_img_create(const char *filename, const char *fmt,
}
backing_fmt = qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT);
- if (backing_fmt) {
- backing_drv = bdrv_find_format(backing_fmt);
- if (!backing_drv) {
- error_setg(errp, "Unknown backing file format '%s'",
- backing_fmt);
- goto out;
- }
- }
// The size for the image must always be specified, with one exception:
// If we are using a backing file, we can obtain the size from there
@@ -3831,6 +3834,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
char *full_backing = g_new0(char, PATH_MAX);
int64_t size;
int back_flags;
+ QDict *backing_options = NULL;
bdrv_get_full_backing_filename_from_filename(filename, backing_file,
full_backing, PATH_MAX,
@@ -3844,9 +3848,15 @@ void bdrv_img_create(const char *filename, const char *fmt,
back_flags =
flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
+ if (backing_fmt) {
+ backing_options = qdict_new();
+ qdict_put(backing_options, "driver",
+ qstring_from_str(backing_fmt));
+ }
+
bs = NULL;
- ret = bdrv_open(&bs, full_backing, NULL, NULL, back_flags,
- backing_drv, &local_err);
+ ret = bdrv_open(&bs, full_backing, NULL, backing_options,
+ back_flags, &local_err);
g_free(full_backing);
if (ret < 0) {
goto out;
diff --git a/block/block-backend.c b/block/block-backend.c
index aee8a12023..c2e873292a 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -126,7 +126,7 @@ BlockBackend *blk_new_open(const char *name, const char *filename,
return NULL;
}
- ret = bdrv_open(&blk->bs, filename, reference, options, flags, NULL, errp);
+ ret = bdrv_open(&blk->bs, filename, reference, options, flags, errp);
if (ret < 0) {
blk_unref(blk);
return NULL;
diff --git a/block/commit.c b/block/commit.c
index 7312a5bdc0..d12e26fab6 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -236,11 +236,11 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
/* convert base & overlay_bs to r/w, if necessary */
if (!(orig_base_flags & BDRV_O_RDWR)) {
- reopen_queue = bdrv_reopen_queue(reopen_queue, base,
+ reopen_queue = bdrv_reopen_queue(reopen_queue, base, NULL,
orig_base_flags | BDRV_O_RDWR);
}
if (!(orig_overlay_flags & BDRV_O_RDWR)) {
- reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs,
+ reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs, NULL,
orig_overlay_flags | BDRV_O_RDWR);
}
if (reopen_queue) {
diff --git a/block/parallels.c b/block/parallels.c
index 046b56844c..5cd6ec3349 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -476,7 +476,7 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
file = NULL;
ret = bdrv_open(&file, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
return ret;
diff --git a/block/qcow.c b/block/qcow.c
index 01fba54cef..6e35db1df8 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -793,7 +793,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
qcow_bs = NULL;
ret = bdrv_open(&qcow_bs, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto cleanup;
diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
index 046f5b8e48..7b14c5c5a5 100644
--- a/block/qcow2-cache.c
+++ b/block/qcow2-cache.c
@@ -55,14 +55,14 @@ struct Qcow2Cache {
static inline void *qcow2_cache_get_table_addr(BlockDriverState *bs,
Qcow2Cache *c, int table)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
return (uint8_t *) c->table_array + (size_t) table * s->cluster_size;
}
static inline int qcow2_cache_get_table_idx(BlockDriverState *bs,
Qcow2Cache *c, void *table)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
ptrdiff_t table_offset = (uint8_t *) table - (uint8_t *) c->table_array;
int idx = table_offset / s->cluster_size;
assert(idx >= 0 && idx < c->size && table_offset % s->cluster_size == 0);
@@ -73,7 +73,7 @@ static void qcow2_cache_table_release(BlockDriverState *bs, Qcow2Cache *c,
int i, int num_tables)
{
#if QEMU_MADV_DONTNEED != QEMU_MADV_INVALID
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
void *t = qcow2_cache_get_table_addr(bs, c, i);
int align = getpagesize();
size_t mem_size = (size_t) s->cluster_size * num_tables;
@@ -121,7 +121,7 @@ void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c)
Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
Qcow2Cache *c;
c = g_new0(Qcow2Cache, 1);
@@ -172,7 +172,7 @@ static int qcow2_cache_flush_dependency(BlockDriverState *bs, Qcow2Cache *c)
static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret = 0;
if (!c->entries[i].dirty || !c->entries[i].offset) {
@@ -229,7 +229,7 @@ static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int result = 0;
int ret;
int i;
@@ -306,7 +306,7 @@ int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c)
static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c,
uint64_t offset, void **table, bool read_from_disk)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int i;
int ret;
int lookup_index;
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 61309aec56..6ede629efb 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -32,7 +32,7 @@
int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
bool exact_size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int new_l1_size2, ret, i;
uint64_t *new_l1_table;
int64_t old_l1_table_offset, old_l1_size;
@@ -148,7 +148,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
uint64_t **l2_table)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret;
ret = qcow2_cache_get(bs, s->l2_table_cache, l2_offset, (void**) l2_table);
@@ -163,7 +163,7 @@ static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
#define L1_ENTRIES_PER_SECTOR (512 / 8)
int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t buf[L1_ENTRIES_PER_SECTOR] = { 0 };
int l1_start_index;
int i, ret;
@@ -203,7 +203,7 @@ int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index)
static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t old_l2_offset;
uint64_t *l2_table = NULL;
int64_t l2_offset;
@@ -298,7 +298,7 @@ fail:
* as contiguous. (This allows it, for example, to stop at the first compressed
* cluster which may require a different handling)
*/
-static int count_contiguous_clusters(uint64_t nb_clusters, int cluster_size,
+static int count_contiguous_clusters(int nb_clusters, int cluster_size,
uint64_t *l2_table, uint64_t stop_flags)
{
int i;
@@ -321,7 +321,7 @@ static int count_contiguous_clusters(uint64_t nb_clusters, int cluster_size,
return i;
}
-static int count_contiguous_free_clusters(uint64_t nb_clusters, uint64_t *l2_table)
+static int count_contiguous_free_clusters(int nb_clusters, uint64_t *l2_table)
{
int i;
@@ -339,7 +339,7 @@ static int count_contiguous_free_clusters(uint64_t nb_clusters, uint64_t *l2_tab
/* The crypt function is compatible with the linux cryptoloop
algorithm for < 4 GB images. NOTE: out_buf == in_buf is
supported */
-int qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
+int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
uint8_t *out_buf, const uint8_t *in_buf,
int nb_sectors, bool enc,
Error **errp)
@@ -387,7 +387,7 @@ static int coroutine_fn copy_sectors(BlockDriverState *bs,
uint64_t cluster_offset,
int n_start, int n_end)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QEMUIOVector qiov;
struct iovec iov;
int n, ret;
@@ -469,7 +469,7 @@ out:
int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
int *num, uint64_t *cluster_offset)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
unsigned int l2_index;
uint64_t l1_index, l2_offset, *l2_table;
int l1_bits, c;
@@ -495,6 +495,7 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
if (nb_needed > nb_available) {
nb_needed = nb_available;
}
+ assert(nb_needed <= INT_MAX);
*cluster_offset = 0;
@@ -530,6 +531,8 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
l2_index = (offset >> s->cluster_bits) & (s->l2_size - 1);
*cluster_offset = be64_to_cpu(l2_table[l2_index]);
+
+ /* nb_needed <= INT_MAX, thus nb_clusters <= INT_MAX, too */
nb_clusters = size_to_clusters(s, nb_needed << 9);
ret = qcow2_get_cluster_type(*cluster_offset);
@@ -606,7 +609,7 @@ static int get_cluster_table(BlockDriverState *bs, uint64_t offset,
uint64_t **new_l2_table,
int *new_l2_index)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
unsigned int l2_index;
uint64_t l1_index, l2_offset;
uint64_t *l2_table = NULL;
@@ -680,7 +683,7 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
uint64_t offset,
int compressed_size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int l2_index, ret;
uint64_t *l2_table;
int64_t cluster_offset;
@@ -725,7 +728,7 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
static int perform_cow(BlockDriverState *bs, QCowL2Meta *m, Qcow2COWRegion *r)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret;
if (r->nb_sectors == 0) {
@@ -754,7 +757,7 @@ static int perform_cow(BlockDriverState *bs, QCowL2Meta *m, Qcow2COWRegion *r)
int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int i, j = 0, l2_index, ret;
uint64_t *old_cluster, *l2_table;
uint64_t cluster_offset = m->alloc_offset;
@@ -837,7 +840,7 @@ err:
* write, but require COW to be performed (this includes yet unallocated space,
* which must copy from the backing file)
*/
-static int count_cow_clusters(BDRVQcowState *s, int nb_clusters,
+static int count_cow_clusters(BDRVQcow2State *s, int nb_clusters,
uint64_t *l2_table, int l2_index)
{
int i;
@@ -883,7 +886,7 @@ out:
static int handle_dependencies(BlockDriverState *bs, uint64_t guest_offset,
uint64_t *cur_bytes, QCowL2Meta **m)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowL2Meta *old_alloc;
uint64_t bytes = *cur_bytes;
@@ -956,11 +959,11 @@ static int handle_dependencies(BlockDriverState *bs, uint64_t guest_offset,
static int handle_copied(BlockDriverState *bs, uint64_t guest_offset,
uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int l2_index;
uint64_t cluster_offset;
uint64_t *l2_table;
- unsigned int nb_clusters;
+ uint64_t nb_clusters;
unsigned int keep_clusters;
int ret;
@@ -979,6 +982,7 @@ static int handle_copied(BlockDriverState *bs, uint64_t guest_offset,
l2_index = offset_to_l2_index(s, guest_offset);
nb_clusters = MIN(nb_clusters, s->l2_size - l2_index);
+ assert(nb_clusters <= INT_MAX);
/* Find L2 entry for the first involved cluster */
ret = get_cluster_table(bs, guest_offset, &l2_table, &l2_index);
@@ -1061,9 +1065,9 @@ out:
* restarted, but the whole request should not be failed.
*/
static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
- uint64_t *host_offset, unsigned int *nb_clusters)
+ uint64_t *host_offset, uint64_t *nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
trace_qcow2_do_alloc_clusters_offset(qemu_coroutine_self(), guest_offset,
*host_offset, *nb_clusters);
@@ -1079,7 +1083,7 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
*host_offset = cluster_offset;
return 0;
} else {
- int ret = qcow2_alloc_clusters_at(bs, *host_offset, *nb_clusters);
+ int64_t ret = qcow2_alloc_clusters_at(bs, *host_offset, *nb_clusters);
if (ret < 0) {
return ret;
}
@@ -1111,11 +1115,11 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int l2_index;
uint64_t *l2_table;
uint64_t entry;
- unsigned int nb_clusters;
+ uint64_t nb_clusters;
int ret;
uint64_t alloc_cluster_offset;
@@ -1133,6 +1137,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
l2_index = offset_to_l2_index(s, guest_offset);
nb_clusters = MIN(nb_clusters, s->l2_size - l2_index);
+ assert(nb_clusters <= INT_MAX);
/* Find L2 entry for the first involved cluster */
ret = get_cluster_table(bs, guest_offset, &l2_table, &l2_index);
@@ -1263,7 +1268,7 @@ fail:
int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
int *num, uint64_t *host_offset, QCowL2Meta **m)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t start, remaining;
uint64_t cluster_offset;
uint64_t cur_bytes;
@@ -1397,7 +1402,7 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size,
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret, csize, nb_csectors, sector_offset;
uint64_t coffset;
@@ -1426,9 +1431,10 @@ int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
* clusters.
*/
static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
- unsigned int nb_clusters, enum qcow2_discard_type type, bool full_discard)
+ uint64_t nb_clusters, enum qcow2_discard_type type,
+ bool full_discard)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l2_table;
int l2_index;
int ret;
@@ -1441,6 +1447,7 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
/* Limit nb_clusters to one L2 table */
nb_clusters = MIN(nb_clusters, s->l2_size - l2_index);
+ assert(nb_clusters <= INT_MAX);
for (i = 0; i < nb_clusters; i++) {
uint64_t old_l2_entry;
@@ -1501,9 +1508,9 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
int nb_sectors, enum qcow2_discard_type type, bool full_discard)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t end_offset;
- unsigned int nb_clusters;
+ uint64_t nb_clusters;
int ret;
end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS);
@@ -1545,9 +1552,9 @@ fail:
* clusters.
*/
static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
- unsigned int nb_clusters)
+ uint64_t nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l2_table;
int l2_index;
int ret;
@@ -1560,6 +1567,7 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
/* Limit nb_clusters to one L2 table */
nb_clusters = MIN(nb_clusters, s->l2_size - l2_index);
+ assert(nb_clusters <= INT_MAX);
for (i = 0; i < nb_clusters; i++) {
uint64_t old_offset;
@@ -1583,8 +1591,8 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors)
{
- BDRVQcowState *s = bs->opaque;
- unsigned int nb_clusters;
+ BDRVQcow2State *s = bs->opaque;
+ uint64_t nb_clusters;
int ret;
/* The zero flag is only supported by version 3 and newer */
@@ -1628,7 +1636,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
int64_t l1_entries,
BlockDriverAmendStatusCB *status_cb)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
bool is_active_l1 = (l1_table == s->l1_table);
uint64_t *l2_table = NULL;
int ret;
@@ -1815,7 +1823,7 @@ fail:
int qcow2_expand_zero_clusters(BlockDriverState *bs,
BlockDriverAmendStatusCB *status_cb)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l1_table = NULL;
int64_t l1_entries = 0, visited_l1_entries = 0;
int ret;
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index d8f06458c9..2110839da4 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -82,7 +82,7 @@ static Qcow2SetRefcountFunc *const set_refcount_funcs[] = {
int qcow2_refcount_init(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
unsigned int refcount_table_size2, i;
int ret;
@@ -116,7 +116,7 @@ int qcow2_refcount_init(BlockDriverState *bs)
void qcow2_refcount_close(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
g_free(s->refcount_table);
}
@@ -214,7 +214,7 @@ static int load_refcount_block(BlockDriverState *bs,
int64_t refcount_block_offset,
void **refcount_block)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret;
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_LOAD);
@@ -231,7 +231,7 @@ static int load_refcount_block(BlockDriverState *bs,
int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
uint64_t *refcount)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t refcount_table_index, block_index;
int64_t refcount_block_offset;
int ret;
@@ -274,7 +274,7 @@ int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
* Rounds the refcount table size up to avoid growing the table for each single
* refcount block that is allocated.
*/
-static unsigned int next_refcount_table_size(BDRVQcowState *s,
+static unsigned int next_refcount_table_size(BDRVQcow2State *s,
unsigned int min_size)
{
unsigned int min_clusters = (min_size >> (s->cluster_bits - 3)) + 1;
@@ -290,7 +290,7 @@ static unsigned int next_refcount_table_size(BDRVQcowState *s,
/* Checks if two offsets are described by the same refcount block */
-static int in_same_refcount_block(BDRVQcowState *s, uint64_t offset_a,
+static int in_same_refcount_block(BDRVQcow2State *s, uint64_t offset_a,
uint64_t offset_b)
{
uint64_t block_a = offset_a >> (s->cluster_bits + s->refcount_block_bits);
@@ -308,7 +308,7 @@ static int in_same_refcount_block(BDRVQcowState *s, uint64_t offset_a,
static int alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index, void **refcount_block)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
unsigned int refcount_table_index;
int ret;
@@ -605,7 +605,7 @@ fail_block:
void qcow2_process_discards(BlockDriverState *bs, int ret)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
Qcow2DiscardRegion *d, *next;
QTAILQ_FOREACH_SAFE(d, &s->discards, next, next) {
@@ -625,7 +625,7 @@ void qcow2_process_discards(BlockDriverState *bs, int ret)
static void update_refcount_discard(BlockDriverState *bs,
uint64_t offset, uint64_t length)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
Qcow2DiscardRegion *d, *p, *next;
QTAILQ_FOREACH(d, &s->discards, next) {
@@ -682,7 +682,7 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
bool decrease,
enum qcow2_discard_type type)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t start, last, cluster_offset;
void *refcount_block = NULL;
int64_t old_table_index = -1;
@@ -793,7 +793,7 @@ int qcow2_update_cluster_refcount(BlockDriverState *bs,
uint64_t addend, bool decrease,
enum qcow2_discard_type type)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret;
ret = update_refcount(bs, cluster_index << s->cluster_bits, 1, addend,
@@ -815,7 +815,7 @@ int qcow2_update_cluster_refcount(BlockDriverState *bs,
/* return < 0 if error */
static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t i, nb_clusters, refcount;
int ret;
@@ -875,10 +875,10 @@ int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size)
return offset;
}
-int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
- int nb_clusters)
+int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
+ int64_t nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t cluster_index, refcount;
uint64_t i;
int ret;
@@ -916,7 +916,7 @@ int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
contiguous sectors. size must be <= cluster_size */
int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t offset;
size_t free_in_cluster;
int ret;
@@ -949,11 +949,17 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
if (!offset || ROUND_UP(offset, s->cluster_size) != new_cluster) {
offset = new_cluster;
+ free_in_cluster = s->cluster_size;
+ } else {
+ free_in_cluster += s->cluster_size;
}
}
assert(offset);
ret = update_refcount(bs, offset, size, 1, false, QCOW2_DISCARD_NEVER);
+ if (ret < 0) {
+ offset = 0;
+ }
} while (ret == -EAGAIN);
if (ret < 0) {
return ret;
@@ -992,7 +998,7 @@ void qcow2_free_clusters(BlockDriverState *bs,
void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
int nb_clusters, enum qcow2_discard_type type)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
switch (qcow2_get_cluster_type(l2_entry)) {
case QCOW2_CLUSTER_COMPRESSED:
@@ -1036,7 +1042,7 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
int qcow2_update_snapshot_refcount(BlockDriverState *bs,
int64_t l1_table_offset, int l1_size, int addend)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l1_table, *l2_table, l2_offset, offset, l1_size2, refcount;
bool l1_allocated = false;
int64_t old_offset, old_l2_offset;
@@ -1233,7 +1239,7 @@ fail:
/* refcount checking functions */
-static size_t refcount_array_byte_size(BDRVQcowState *s, uint64_t entries)
+static size_t refcount_array_byte_size(BDRVQcow2State *s, uint64_t entries)
{
/* This assertion holds because there is no way we can address more than
* 2^(64 - 9) clusters at once (with cluster size 512 = 2^9, and because
@@ -1256,10 +1262,10 @@ static size_t refcount_array_byte_size(BDRVQcowState *s, uint64_t entries)
* refcount array buffer will be aligned to a cluster boundary, and the newly
* allocated area will be zeroed.
*/
-static int realloc_refcount_array(BDRVQcowState *s, void **array,
+static int realloc_refcount_array(BDRVQcow2State *s, void **array,
int64_t *size, int64_t new_size)
{
- size_t old_byte_size, new_byte_size;
+ int64_t old_byte_size, new_byte_size;
void *new_ptr;
/* Round to clusters so the array can be directly written to disk */
@@ -1275,13 +1281,17 @@ static int realloc_refcount_array(BDRVQcowState *s, void **array,
assert(new_byte_size > 0);
+ if (new_byte_size > SIZE_MAX) {
+ return -ENOMEM;
+ }
+
new_ptr = g_try_realloc(*array, new_byte_size);
if (!new_ptr) {
return -ENOMEM;
}
if (new_byte_size > old_byte_size) {
- memset((void *)((uintptr_t)new_ptr + old_byte_size), 0,
+ memset((char *)new_ptr + old_byte_size, 0,
new_byte_size - old_byte_size);
}
@@ -1304,7 +1314,7 @@ static int inc_refcounts(BlockDriverState *bs,
int64_t *refcount_table_size,
int64_t offset, int64_t size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t start, last, cluster_offset, k, refcount;
int ret;
@@ -1357,7 +1367,7 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res,
int64_t *refcount_table_size, int64_t l2_offset,
int flags)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l2_table, l2_entry;
uint64_t next_contiguous_offset = 0;
int i, l2_size, nb_csectors, ret;
@@ -1477,7 +1487,7 @@ static int check_refcounts_l1(BlockDriverState *bs,
int64_t l1_table_offset, int l1_size,
int flags)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l1_table = NULL, l2_offset, l1_size2;
int i, ret;
@@ -1554,7 +1564,7 @@ fail:
static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t *l2_table = qemu_blockalign(bs, s->cluster_size);
int ret;
uint64_t refcount;
@@ -1673,7 +1683,7 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix, bool *rebuild,
void **refcount_table, int64_t *nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t i, size;
int ret;
@@ -1776,7 +1786,7 @@ static int calculate_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix, bool *rebuild,
void **refcount_table, int64_t *nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t i;
QCowSnapshot *sn;
int ret;
@@ -1840,7 +1850,7 @@ static void compare_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
int64_t *highest_cluster,
void *refcount_table, int64_t nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t i;
uint64_t refcount1, refcount2;
int ret;
@@ -1917,7 +1927,7 @@ static int64_t alloc_clusters_imrt(BlockDriverState *bs,
int64_t *imrt_nb_clusters,
int64_t *first_free_cluster)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t cluster = *first_free_cluster, i;
bool first_gap = true;
int contiguous_free_clusters;
@@ -1987,7 +1997,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
void **refcount_table,
int64_t *nb_clusters)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t first_free_cluster = 0, reftable_offset = -1, cluster = 0;
int64_t refblock_offset, refblock_start, refblock_index;
uint32_t reftable_size = 0;
@@ -2174,7 +2184,7 @@ fail:
int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
BdrvCheckResult pre_compare_res;
int64_t size, highest_cluster, nb_clusters;
void *refcount_table = NULL;
@@ -2311,7 +2321,7 @@ fail:
int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
int64_t size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int chk = s->overlap_check & ~ign;
int i, j;
diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c
index b6f58c13e2..92f4dfc083 100644
--- a/block/qcow2-snapshot.c
+++ b/block/qcow2-snapshot.c
@@ -29,7 +29,7 @@
void qcow2_free_snapshots(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int i;
for(i = 0; i < s->nb_snapshots; i++) {
@@ -43,7 +43,7 @@ void qcow2_free_snapshots(BlockDriverState *bs)
int qcow2_read_snapshots(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshotHeader h;
QCowSnapshotExtraData extra;
QCowSnapshot *sn;
@@ -136,7 +136,7 @@ fail:
/* add at the end of the file a new list of snapshots */
static int qcow2_write_snapshots(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot *sn;
QCowSnapshotHeader h;
QCowSnapshotExtraData extra;
@@ -278,7 +278,7 @@ fail:
static void find_new_snapshot_id(BlockDriverState *bs,
char *id_str, int id_str_size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot *sn;
int i;
unsigned long id, id_max = 0;
@@ -296,7 +296,7 @@ static int find_snapshot_by_id_and_name(BlockDriverState *bs,
const char *id,
const char *name)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int i;
if (id && name) {
@@ -338,7 +338,7 @@ static int find_snapshot_by_id_or_name(BlockDriverState *bs,
/* if no id is provided, a new one is constructed */
int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot *new_snapshot_list = NULL;
QCowSnapshot *old_snapshot_list = NULL;
QCowSnapshot sn1, *sn = &sn1;
@@ -461,7 +461,7 @@ fail:
/* copy the snapshot 'snapshot_name' into the current disk image */
int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot *sn;
int i, snapshot_index;
int cur_l1_bytes, sn_l1_bytes;
@@ -587,7 +587,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs,
const char *name,
Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot sn;
int snapshot_index, ret;
@@ -650,7 +650,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs,
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QEMUSnapshotInfo *sn_tab, *sn_info;
QCowSnapshot *sn;
int i;
@@ -683,7 +683,7 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs,
Error **errp)
{
int i, snapshot_index;
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowSnapshot *sn;
uint64_t *new_l1_table;
int new_l1_bytes;
diff --git a/block/qcow2.c b/block/qcow2.c
index ea34ae2da5..56ad808f6b 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -85,7 +85,7 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
uint64_t end_offset, void **p_feature_table,
Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowExtension ext;
uint64_t offset;
int ret;
@@ -187,7 +187,7 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
static void cleanup_unknown_header_ext(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
Qcow2UnknownHeaderExtension *uext, *next;
QLIST_FOREACH_SAFE(uext, &s->unknown_header_ext, next, next) {
@@ -249,7 +249,7 @@ static void report_unsupported_feature(BlockDriverState *bs,
*/
int qcow2_mark_dirty(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t val;
int ret;
@@ -282,7 +282,7 @@ int qcow2_mark_dirty(BlockDriverState *bs)
*/
static int qcow2_mark_clean(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
if (s->incompatible_features & QCOW2_INCOMPAT_DIRTY) {
int ret;
@@ -304,7 +304,7 @@ static int qcow2_mark_clean(BlockDriverState *bs)
*/
int qcow2_mark_corrupt(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
s->incompatible_features |= QCOW2_INCOMPAT_CORRUPT;
return qcow2_update_header(bs);
@@ -316,7 +316,7 @@ int qcow2_mark_corrupt(BlockDriverState *bs)
*/
int qcow2_mark_consistent(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
if (s->incompatible_features & QCOW2_INCOMPAT_CORRUPT) {
int ret = bdrv_flush(bs);
@@ -351,7 +351,7 @@ static int qcow2_check(BlockDriverState *bs, BdrvCheckResult *result,
static int validate_table_offset(BlockDriverState *bs, uint64_t offset,
uint64_t entries, size_t entry_len)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t size;
/* Use signed INT64_MAX as the maximum even for uint64_t header fields,
@@ -490,7 +490,7 @@ static const char *overlap_bool_option_names[QCOW2_OL_MAX_BITNR] = {
static void cache_clean_timer_cb(void *opaque)
{
BlockDriverState *bs = opaque;
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
qcow2_cache_clean_unused(bs, s->l2_table_cache);
qcow2_cache_clean_unused(bs, s->refcount_block_cache);
timer_mod(s->cache_clean_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
@@ -499,7 +499,7 @@ static void cache_clean_timer_cb(void *opaque)
static void cache_clean_timer_init(BlockDriverState *bs, AioContext *context)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
if (s->cache_clean_interval > 0) {
s->cache_clean_timer = aio_timer_new(context, QEMU_CLOCK_VIRTUAL,
SCALE_MS, cache_clean_timer_cb,
@@ -511,7 +511,7 @@ static void cache_clean_timer_init(BlockDriverState *bs, AioContext *context)
static void cache_clean_timer_del(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
if (s->cache_clean_timer) {
timer_del(s->cache_clean_timer);
timer_free(s->cache_clean_timer);
@@ -534,7 +534,7 @@ static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
uint64_t *l2_cache_size,
uint64_t *refcount_cache_size, Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t combined_cache_size;
bool l2_cache_size_set, refcount_cache_size_set, combined_cache_size_set;
@@ -589,21 +589,244 @@ static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
}
}
+typedef struct Qcow2ReopenState {
+ Qcow2Cache *l2_table_cache;
+ Qcow2Cache *refcount_block_cache;
+ bool use_lazy_refcounts;
+ int overlap_check;
+ bool discard_passthrough[QCOW2_DISCARD_MAX];
+ uint64_t cache_clean_interval;
+} Qcow2ReopenState;
+
+static int qcow2_update_options_prepare(BlockDriverState *bs,
+ Qcow2ReopenState *r,
+ QDict *options, int flags,
+ Error **errp)
+{
+ BDRVQcow2State *s = bs->opaque;
+ QemuOpts *opts = NULL;
+ const char *opt_overlap_check, *opt_overlap_check_template;
+ int overlap_check_template = 0;
+ uint64_t l2_cache_size, refcount_cache_size;
+ int i;
+ Error *local_err = NULL;
+ int ret;
+
+ opts = qemu_opts_create(&qcow2_runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, options, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* get L2 table/refcount block cache size from command line options */
+ read_cache_sizes(bs, opts, &l2_cache_size, &refcount_cache_size,
+ &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ l2_cache_size /= s->cluster_size;
+ if (l2_cache_size < MIN_L2_CACHE_SIZE) {
+ l2_cache_size = MIN_L2_CACHE_SIZE;
+ }
+ if (l2_cache_size > INT_MAX) {
+ error_setg(errp, "L2 cache size too big");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ refcount_cache_size /= s->cluster_size;
+ if (refcount_cache_size < MIN_REFCOUNT_CACHE_SIZE) {
+ refcount_cache_size = MIN_REFCOUNT_CACHE_SIZE;
+ }
+ if (refcount_cache_size > INT_MAX) {
+ error_setg(errp, "Refcount cache size too big");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* alloc new L2 table/refcount block cache, flush old one */
+ if (s->l2_table_cache) {
+ ret = qcow2_cache_flush(bs, s->l2_table_cache);
+ if (ret) {
+ error_setg_errno(errp, -ret, "Failed to flush the L2 table cache");
+ goto fail;
+ }
+ }
+
+ if (s->refcount_block_cache) {
+ ret = qcow2_cache_flush(bs, s->refcount_block_cache);
+ if (ret) {
+ error_setg_errno(errp, -ret,
+ "Failed to flush the refcount block cache");
+ goto fail;
+ }
+ }
+
+ r->l2_table_cache = qcow2_cache_create(bs, l2_cache_size);
+ r->refcount_block_cache = qcow2_cache_create(bs, refcount_cache_size);
+ if (r->l2_table_cache == NULL || r->refcount_block_cache == NULL) {
+ error_setg(errp, "Could not allocate metadata caches");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ /* New interval for cache cleanup timer */
+ r->cache_clean_interval =
+ qemu_opt_get_number(opts, QCOW2_OPT_CACHE_CLEAN_INTERVAL,
+ s->cache_clean_interval);
+ if (r->cache_clean_interval > UINT_MAX) {
+ error_setg(errp, "Cache clean interval too big");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ /* lazy-refcounts; flush if going from enabled to disabled */
+ r->use_lazy_refcounts = qemu_opt_get_bool(opts, QCOW2_OPT_LAZY_REFCOUNTS,
+ (s->compatible_features & QCOW2_COMPAT_LAZY_REFCOUNTS));
+ if (r->use_lazy_refcounts && s->qcow_version < 3) {
+ error_setg(errp, "Lazy refcounts require a qcow2 image with at least "
+ "qemu 1.1 compatibility level");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ if (s->use_lazy_refcounts && !r->use_lazy_refcounts) {
+ ret = qcow2_mark_clean(bs);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Failed to disable lazy refcounts");
+ goto fail;
+ }
+ }
+
+ /* Overlap check options */
+ opt_overlap_check = qemu_opt_get(opts, QCOW2_OPT_OVERLAP);
+ opt_overlap_check_template = qemu_opt_get(opts, QCOW2_OPT_OVERLAP_TEMPLATE);
+ if (opt_overlap_check_template && opt_overlap_check &&
+ strcmp(opt_overlap_check_template, opt_overlap_check))
+ {
+ error_setg(errp, "Conflicting values for qcow2 options '"
+ QCOW2_OPT_OVERLAP "' ('%s') and '" QCOW2_OPT_OVERLAP_TEMPLATE
+ "' ('%s')", opt_overlap_check, opt_overlap_check_template);
+ ret = -EINVAL;
+ goto fail;
+ }
+ if (!opt_overlap_check) {
+ opt_overlap_check = opt_overlap_check_template ?: "cached";
+ }
+
+ if (!strcmp(opt_overlap_check, "none")) {
+ overlap_check_template = 0;
+ } else if (!strcmp(opt_overlap_check, "constant")) {
+ overlap_check_template = QCOW2_OL_CONSTANT;
+ } else if (!strcmp(opt_overlap_check, "cached")) {
+ overlap_check_template = QCOW2_OL_CACHED;
+ } else if (!strcmp(opt_overlap_check, "all")) {
+ overlap_check_template = QCOW2_OL_ALL;
+ } else {
+ error_setg(errp, "Unsupported value '%s' for qcow2 option "
+ "'overlap-check'. Allowed are any of the following: "
+ "none, constant, cached, all", opt_overlap_check);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ r->overlap_check = 0;
+ for (i = 0; i < QCOW2_OL_MAX_BITNR; i++) {
+ /* overlap-check defines a template bitmask, but every flag may be
+ * overwritten through the associated boolean option */
+ r->overlap_check |=
+ qemu_opt_get_bool(opts, overlap_bool_option_names[i],
+ overlap_check_template & (1 << i)) << i;
+ }
+
+ r->discard_passthrough[QCOW2_DISCARD_NEVER] = false;
+ r->discard_passthrough[QCOW2_DISCARD_ALWAYS] = true;
+ r->discard_passthrough[QCOW2_DISCARD_REQUEST] =
+ qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_REQUEST,
+ flags & BDRV_O_UNMAP);
+ r->discard_passthrough[QCOW2_DISCARD_SNAPSHOT] =
+ qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_SNAPSHOT, true);
+ r->discard_passthrough[QCOW2_DISCARD_OTHER] =
+ qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_OTHER, false);
+
+ ret = 0;
+fail:
+ qemu_opts_del(opts);
+ opts = NULL;
+ return ret;
+}
+
+static void qcow2_update_options_commit(BlockDriverState *bs,
+ Qcow2ReopenState *r)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int i;
+
+ if (s->l2_table_cache) {
+ qcow2_cache_destroy(bs, s->l2_table_cache);
+ }
+ if (s->refcount_block_cache) {
+ qcow2_cache_destroy(bs, s->refcount_block_cache);
+ }
+ s->l2_table_cache = r->l2_table_cache;
+ s->refcount_block_cache = r->refcount_block_cache;
+
+ s->overlap_check = r->overlap_check;
+ s->use_lazy_refcounts = r->use_lazy_refcounts;
+
+ for (i = 0; i < QCOW2_DISCARD_MAX; i++) {
+ s->discard_passthrough[i] = r->discard_passthrough[i];
+ }
+
+ if (s->cache_clean_interval != r->cache_clean_interval) {
+ cache_clean_timer_del(bs);
+ s->cache_clean_interval = r->cache_clean_interval;
+ cache_clean_timer_init(bs, bdrv_get_aio_context(bs));
+ }
+}
+
+static void qcow2_update_options_abort(BlockDriverState *bs,
+ Qcow2ReopenState *r)
+{
+ if (r->l2_table_cache) {
+ qcow2_cache_destroy(bs, r->l2_table_cache);
+ }
+ if (r->refcount_block_cache) {
+ qcow2_cache_destroy(bs, r->refcount_block_cache);
+ }
+}
+
+static int qcow2_update_options(BlockDriverState *bs, QDict *options,
+ int flags, Error **errp)
+{
+ Qcow2ReopenState r = {};
+ int ret;
+
+ ret = qcow2_update_options_prepare(bs, &r, options, flags, errp);
+ if (ret >= 0) {
+ qcow2_update_options_commit(bs, &r);
+ } else {
+ qcow2_update_options_abort(bs, &r);
+ }
+
+ return ret;
+}
+
static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
unsigned int len, i;
int ret = 0;
QCowHeader header;
- QemuOpts *opts = NULL;
Error *local_err = NULL;
uint64_t ext_end;
uint64_t l1_vm_state_index;
- const char *opt_overlap_check, *opt_overlap_check_template;
- int overlap_check_template = 0;
- uint64_t l2_cache_size, refcount_cache_size;
- uint64_t cache_clean_interval;
ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
if (ret < 0) {
@@ -851,61 +1074,11 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
}
- /* get L2 table/refcount block cache size from command line options */
- opts = qemu_opts_create(&qcow2_runtime_opts, NULL, 0, &error_abort);
- qemu_opts_absorb_qdict(opts, options, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto fail;
- }
-
- read_cache_sizes(bs, opts, &l2_cache_size, &refcount_cache_size,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto fail;
- }
-
- l2_cache_size /= s->cluster_size;
- if (l2_cache_size < MIN_L2_CACHE_SIZE) {
- l2_cache_size = MIN_L2_CACHE_SIZE;
- }
- if (l2_cache_size > INT_MAX) {
- error_setg(errp, "L2 cache size too big");
- ret = -EINVAL;
- goto fail;
- }
-
- refcount_cache_size /= s->cluster_size;
- if (refcount_cache_size < MIN_REFCOUNT_CACHE_SIZE) {
- refcount_cache_size = MIN_REFCOUNT_CACHE_SIZE;
- }
- if (refcount_cache_size > INT_MAX) {
- error_setg(errp, "Refcount cache size too big");
- ret = -EINVAL;
- goto fail;
- }
-
- /* alloc L2 table/refcount block cache */
- s->l2_table_cache = qcow2_cache_create(bs, l2_cache_size);
- s->refcount_block_cache = qcow2_cache_create(bs, refcount_cache_size);
- if (s->l2_table_cache == NULL || s->refcount_block_cache == NULL) {
- error_setg(errp, "Could not allocate metadata caches");
- ret = -ENOMEM;
- goto fail;
- }
-
- cache_clean_interval =
- qemu_opt_get_number(opts, QCOW2_OPT_CACHE_CLEAN_INTERVAL, 0);
- if (cache_clean_interval > UINT_MAX) {
- error_setg(errp, "Cache clean interval too big");
- ret = -EINVAL;
+ /* Parse driver-specific options */
+ ret = qcow2_update_options(bs, options, flags, errp);
+ if (ret < 0) {
goto fail;
}
- s->cache_clean_interval = cache_clean_interval;
- cache_clean_timer_init(bs, bdrv_get_aio_context(bs));
s->cluster_cache = g_malloc(s->cluster_size);
/* one more sector for decompressed data alignment */
@@ -991,70 +1164,6 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
}
- /* Enable lazy_refcounts according to image and command line options */
- s->use_lazy_refcounts = qemu_opt_get_bool(opts, QCOW2_OPT_LAZY_REFCOUNTS,
- (s->compatible_features & QCOW2_COMPAT_LAZY_REFCOUNTS));
-
- s->discard_passthrough[QCOW2_DISCARD_NEVER] = false;
- s->discard_passthrough[QCOW2_DISCARD_ALWAYS] = true;
- s->discard_passthrough[QCOW2_DISCARD_REQUEST] =
- qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_REQUEST,
- flags & BDRV_O_UNMAP);
- s->discard_passthrough[QCOW2_DISCARD_SNAPSHOT] =
- qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_SNAPSHOT, true);
- s->discard_passthrough[QCOW2_DISCARD_OTHER] =
- qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_OTHER, false);
-
- opt_overlap_check = qemu_opt_get(opts, QCOW2_OPT_OVERLAP);
- opt_overlap_check_template = qemu_opt_get(opts, QCOW2_OPT_OVERLAP_TEMPLATE);
- if (opt_overlap_check_template && opt_overlap_check &&
- strcmp(opt_overlap_check_template, opt_overlap_check))
- {
- error_setg(errp, "Conflicting values for qcow2 options '"
- QCOW2_OPT_OVERLAP "' ('%s') and '" QCOW2_OPT_OVERLAP_TEMPLATE
- "' ('%s')", opt_overlap_check, opt_overlap_check_template);
- ret = -EINVAL;
- goto fail;
- }
- if (!opt_overlap_check) {
- opt_overlap_check = opt_overlap_check_template ?: "cached";
- }
-
- if (!strcmp(opt_overlap_check, "none")) {
- overlap_check_template = 0;
- } else if (!strcmp(opt_overlap_check, "constant")) {
- overlap_check_template = QCOW2_OL_CONSTANT;
- } else if (!strcmp(opt_overlap_check, "cached")) {
- overlap_check_template = QCOW2_OL_CACHED;
- } else if (!strcmp(opt_overlap_check, "all")) {
- overlap_check_template = QCOW2_OL_ALL;
- } else {
- error_setg(errp, "Unsupported value '%s' for qcow2 option "
- "'overlap-check'. Allowed are either of the following: "
- "none, constant, cached, all", opt_overlap_check);
- ret = -EINVAL;
- goto fail;
- }
-
- s->overlap_check = 0;
- for (i = 0; i < QCOW2_OL_MAX_BITNR; i++) {
- /* overlap-check defines a template bitmask, but every flag may be
- * overwritten through the associated boolean option */
- s->overlap_check |=
- qemu_opt_get_bool(opts, overlap_bool_option_names[i],
- overlap_check_template & (1 << i)) << i;
- }
-
- qemu_opts_del(opts);
- opts = NULL;
-
- if (s->use_lazy_refcounts && s->qcow_version < 3) {
- error_setg(errp, "Lazy refcounts require a qcow2 image with at least "
- "qemu 1.1 compatibility level");
- ret = -EINVAL;
- goto fail;
- }
-
#ifdef DEBUG_ALLOC
{
BdrvCheckResult result = {0};
@@ -1064,7 +1173,6 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
fail:
- qemu_opts_del(opts);
g_free(s->unknown_header_fields);
cleanup_unknown_header_ext(bs);
qcow2_free_snapshots(bs);
@@ -1086,14 +1194,14 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
bs->bl.write_zeroes_alignment = s->cluster_sectors;
}
static int qcow2_set_key(BlockDriverState *bs, const char *key)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint8_t keybuf[16];
int len, i;
Error *err = NULL;
@@ -1126,32 +1234,58 @@ static int qcow2_set_key(BlockDriverState *bs, const char *key)
return 0;
}
-/* We have no actual commit/abort logic for qcow2, but we need to write out any
- * unwritten data if we reopen read-only. */
static int qcow2_reopen_prepare(BDRVReopenState *state,
BlockReopenQueue *queue, Error **errp)
{
+ Qcow2ReopenState *r;
int ret;
+ r = g_new0(Qcow2ReopenState, 1);
+ state->opaque = r;
+
+ ret = qcow2_update_options_prepare(state->bs, r, state->options,
+ state->flags, errp);
+ if (ret < 0) {
+ goto fail;
+ }
+
+ /* We need to write out any unwritten data if we reopen read-only. */
if ((state->flags & BDRV_O_RDWR) == 0) {
ret = bdrv_flush(state->bs);
if (ret < 0) {
- return ret;
+ goto fail;
}
ret = qcow2_mark_clean(state->bs);
if (ret < 0) {
- return ret;
+ goto fail;
}
}
return 0;
+
+fail:
+ qcow2_update_options_abort(state->bs, r);
+ g_free(r);
+ return ret;
+}
+
+static void qcow2_reopen_commit(BDRVReopenState *state)
+{
+ qcow2_update_options_commit(state->bs, state->opaque);
+ g_free(state->opaque);
+}
+
+static void qcow2_reopen_abort(BDRVReopenState *state)
+{
+ qcow2_update_options_abort(state->bs, state->opaque);
+ g_free(state->opaque);
}
static int64_t coroutine_fn qcow2_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t cluster_offset;
int index_in_cluster, ret;
int64_t status = 0;
@@ -1198,7 +1332,7 @@ int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov,
static coroutine_fn int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num,
int remaining_sectors, QEMUIOVector *qiov)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int index_in_cluster, n1;
int ret;
int cur_nr_sectors; /* number of sectors in current iteration */
@@ -1360,7 +1494,7 @@ static coroutine_fn int qcow2_co_writev(BlockDriverState *bs,
int remaining_sectors,
QEMUIOVector *qiov)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int index_in_cluster;
int ret;
int cur_nr_sectors; /* number of sectors in current iteration */
@@ -1506,7 +1640,7 @@ fail:
static void qcow2_close(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
qemu_vfree(s->l1_table);
/* else pre-write overlap checks in cache_destroy may crash */
s->l1_table = NULL;
@@ -1552,7 +1686,7 @@ static void qcow2_close(BlockDriverState *bs)
static void qcow2_invalidate_cache(BlockDriverState *bs, Error **errp)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int flags = s->flags;
QCryptoCipher *cipher = NULL;
QDict *options;
@@ -1575,7 +1709,7 @@ static void qcow2_invalidate_cache(BlockDriverState *bs, Error **errp)
return;
}
- memset(s, 0, sizeof(BDRVQcowState));
+ memset(s, 0, sizeof(BDRVQcow2State));
options = qdict_clone_shallow(bs->options);
ret = qcow2_open(bs, options, flags, &local_err);
@@ -1622,7 +1756,7 @@ static size_t header_ext_add(char *buf, uint32_t magic, const void *s,
*/
int qcow2_update_header(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
QCowHeader *header;
char *buf;
size_t buflen = s->cluster_size;
@@ -1791,7 +1925,7 @@ fail:
static int qcow2_change_backing_file(BlockDriverState *bs,
const char *backing_file, const char *backing_fmt)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
@@ -1873,8 +2007,10 @@ static int qcow2_create2(const char *filename, int64_t total_size,
QemuOpts *opts, int version, int refcount_order,
Error **errp)
{
- /* Calculate cluster_bits */
int cluster_bits;
+ QDict *options;
+
+ /* Calculate cluster_bits */
cluster_bits = ctz32(cluster_size);
if (cluster_bits < MIN_CLUSTER_BITS || cluster_bits > MAX_CLUSTER_BITS ||
(1 << cluster_bits) != cluster_size)
@@ -1973,7 +2109,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
bs = NULL;
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
return ret;
@@ -2032,9 +2168,11 @@ static int qcow2_create2(const char *filename, int64_t total_size,
* refcount of the cluster that is occupied by the header and the refcount
* table)
*/
- ret = bdrv_open(&bs, filename, NULL, NULL,
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str("qcow2"));
+ ret = bdrv_open(&bs, filename, NULL, options,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
- &bdrv_qcow2, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
@@ -2070,7 +2208,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
/* And if we're supposed to preallocate metadata, do that now */
if (prealloc != PREALLOC_MODE_OFF) {
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
qemu_co_mutex_lock(&s->lock);
ret = preallocate(bs);
qemu_co_mutex_unlock(&s->lock);
@@ -2084,9 +2222,11 @@ static int qcow2_create2(const char *filename, int64_t total_size,
bs = NULL;
/* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning */
- ret = bdrv_open(&bs, filename, NULL, NULL,
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str("qcow2"));
+ ret = bdrv_open(&bs, filename, NULL, options,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
- &bdrv_qcow2, &local_err);
+ &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto out;
@@ -2203,7 +2343,7 @@ static coroutine_fn int qcow2_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, BdrvRequestFlags flags)
{
int ret;
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
/* Emulate misaligned zero writes */
if (sector_num % s->cluster_sectors || nb_sectors % s->cluster_sectors) {
@@ -2223,7 +2363,7 @@ static coroutine_fn int qcow2_co_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors)
{
int ret;
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
qemu_co_mutex_lock(&s->lock);
ret = qcow2_discard_clusters(bs, sector_num << BDRV_SECTOR_BITS,
@@ -2234,7 +2374,7 @@ static coroutine_fn int qcow2_co_discard(BlockDriverState *bs,
static int qcow2_truncate(BlockDriverState *bs, int64_t offset)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t new_l1_size;
int ret;
@@ -2278,7 +2418,7 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset)
static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
z_stream strm;
int ret, out_len;
uint8_t *out_buf;
@@ -2369,7 +2509,7 @@ fail:
static int make_completely_empty(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret, l1_clusters;
int64_t offset;
uint64_t *new_reftable = NULL;
@@ -2517,7 +2657,7 @@ fail:
static int qcow2_make_empty(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
uint64_t start_sector;
int sector_step = INT_MAX / BDRV_SECTOR_SIZE;
int l1_clusters, ret = 0;
@@ -2558,7 +2698,7 @@ static int qcow2_make_empty(BlockDriverState *bs)
static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int ret;
qemu_co_mutex_lock(&s->lock);
@@ -2582,7 +2722,7 @@ static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = (s->qcow_version >= 3);
bdi->cluster_size = s->cluster_size;
@@ -2592,7 +2732,7 @@ static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
static ImageInfoSpecific *qcow2_get_specific_info(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
ImageInfoSpecific *spec_info = g_new(ImageInfoSpecific, 1);
*spec_info = (ImageInfoSpecific){
@@ -2625,7 +2765,7 @@ static ImageInfoSpecific *qcow2_get_specific_info(BlockDriverState *bs)
#if 0
static void dump_refcounts(BlockDriverState *bs)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t nb_clusters, k, k1, size;
int refcount;
@@ -2646,7 +2786,7 @@ static void dump_refcounts(BlockDriverState *bs)
static int qcow2_save_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
int64_t pos)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int64_t total_sectors = bs->total_sectors;
bool zero_beyond_eof = bs->zero_beyond_eof;
int ret;
@@ -2667,7 +2807,7 @@ static int qcow2_save_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
static int qcow2_load_vmstate(BlockDriverState *bs, uint8_t *buf,
int64_t pos, int size)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
bool zero_beyond_eof = bs->zero_beyond_eof;
int ret;
@@ -2686,7 +2826,7 @@ static int qcow2_load_vmstate(BlockDriverState *bs, uint8_t *buf,
static int qcow2_downgrade(BlockDriverState *bs, int target_version,
BlockDriverAmendStatusCB *status_cb)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int current_version = s->qcow_version;
int ret;
@@ -2750,7 +2890,7 @@ static int qcow2_downgrade(BlockDriverState *bs, int target_version,
static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
BlockDriverAmendStatusCB *status_cb)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
int old_version = s->qcow_version, new_version = old_version;
uint64_t new_size = 0;
const char *backing_file = NULL, *backing_format = NULL;
@@ -2897,7 +3037,7 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
int64_t size, const char *message_format, ...)
{
- BDRVQcowState *s = bs->opaque;
+ BDRVQcow2State *s = bs->opaque;
const char *node_name;
char *message;
va_list ap;
@@ -2998,11 +3138,13 @@ static QemuOptsList qcow2_create_opts = {
BlockDriver bdrv_qcow2 = {
.format_name = "qcow2",
- .instance_size = sizeof(BDRVQcowState),
+ .instance_size = sizeof(BDRVQcow2State),
.bdrv_probe = qcow2_probe,
.bdrv_open = qcow2_open,
.bdrv_close = qcow2_close,
.bdrv_reopen_prepare = qcow2_reopen_prepare,
+ .bdrv_reopen_commit = qcow2_reopen_commit,
+ .bdrv_reopen_abort = qcow2_reopen_abort,
.bdrv_create = qcow2_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = qcow2_co_get_block_status,
diff --git a/block/qcow2.h b/block/qcow2.h
index 71dafd6dc9..d700bf1b62 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -222,7 +222,7 @@ typedef uint64_t Qcow2GetRefcountFunc(const void *refcount_array,
typedef void Qcow2SetRefcountFunc(void *refcount_array,
uint64_t index, uint64_t value);
-typedef struct BDRVQcowState {
+typedef struct BDRVQcow2State {
int cluster_bits;
int cluster_size;
int cluster_sectors;
@@ -293,7 +293,7 @@ typedef struct BDRVQcowState {
* override) */
char *image_backing_file;
char *image_backing_format;
-} BDRVQcowState;
+} BDRVQcow2State;
struct QCowAIOCB;
@@ -405,28 +405,28 @@ typedef enum QCow2MetadataOverlap {
#define REFT_OFFSET_MASK 0xfffffffffffffe00ULL
-static inline int64_t start_of_cluster(BDRVQcowState *s, int64_t offset)
+static inline int64_t start_of_cluster(BDRVQcow2State *s, int64_t offset)
{
return offset & ~(s->cluster_size - 1);
}
-static inline int64_t offset_into_cluster(BDRVQcowState *s, int64_t offset)
+static inline int64_t offset_into_cluster(BDRVQcow2State *s, int64_t offset)
{
return offset & (s->cluster_size - 1);
}
-static inline int size_to_clusters(BDRVQcowState *s, int64_t size)
+static inline uint64_t size_to_clusters(BDRVQcow2State *s, uint64_t size)
{
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
}
-static inline int64_t size_to_l1(BDRVQcowState *s, int64_t size)
+static inline int64_t size_to_l1(BDRVQcow2State *s, int64_t size)
{
int shift = s->cluster_bits + s->l2_bits;
return (size + (1ULL << shift) - 1) >> shift;
}
-static inline int offset_to_l2_index(BDRVQcowState *s, int64_t offset)
+static inline int offset_to_l2_index(BDRVQcow2State *s, int64_t offset)
{
return (offset >> s->cluster_bits) & (s->l2_size - 1);
}
@@ -437,12 +437,12 @@ static inline int64_t align_offset(int64_t offset, int n)
return offset;
}
-static inline int64_t qcow2_vm_state_offset(BDRVQcowState *s)
+static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s)
{
return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
}
-static inline uint64_t qcow2_max_refcount_clusters(BDRVQcowState *s)
+static inline uint64_t qcow2_max_refcount_clusters(BDRVQcow2State *s)
{
return QCOW_MAX_REFTABLE_SIZE >> s->cluster_bits;
}
@@ -461,7 +461,7 @@ static inline int qcow2_get_cluster_type(uint64_t l2_entry)
}
/* Check whether refcounts are eager or lazy */
-static inline bool qcow2_need_accurate_refcounts(BDRVQcowState *s)
+static inline bool qcow2_need_accurate_refcounts(BDRVQcow2State *s)
{
return !(s->incompatible_features & QCOW2_INCOMPAT_DIRTY);
}
@@ -509,8 +509,8 @@ int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index,
enum qcow2_discard_type type);
int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size);
-int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
- int nb_clusters);
+int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
+ int64_t nb_clusters);
int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size);
void qcow2_free_clusters(BlockDriverState *bs,
int64_t offset, int64_t size,
@@ -537,7 +537,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
void qcow2_l2_cache_reset(BlockDriverState *bs);
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
-int qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
+int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
uint8_t *out_buf, const uint8_t *in_buf,
int nb_sectors, bool enc, Error **errp);
diff --git a/block/qed.c b/block/qed.c
index 954ed007c0..a7ff1d9c41 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -583,7 +583,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
bs = NULL;
ret = bdrv_open(&bs, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL, NULL,
+ BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
&local_err);
if (ret < 0) {
error_propagate(errp, local_err);
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 9585beb73e..67ca788d5c 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1554,7 +1554,7 @@ static int sd_prealloc(const char *filename, Error **errp)
int ret;
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, errp);
+ errp);
if (ret < 0) {
goto out_with_err_set;
}
@@ -1746,8 +1746,7 @@ static int sd_create(const char *filename, QemuOpts *opts,
}
bs = NULL;
- ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, NULL,
- errp);
+ ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, errp);
if (ret < 0) {
goto out;
}
diff --git a/block/vdi.c b/block/vdi.c
index 7642ef3597..062a6541f8 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -764,7 +764,7 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
goto exit;
}
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
diff --git a/block/vhdx.c b/block/vhdx.c
index f05c7a9de3..d3bb1bd9d0 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1842,7 +1842,7 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
bs = NULL;
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
diff --git a/block/vmdk.c b/block/vmdk.c
index fbaab67c8f..be0d6401af 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1324,8 +1324,12 @@ static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset,
write_end_sector = DIV_ROUND_UP(write_offset + write_len, BDRV_SECTOR_SIZE);
- extent->next_cluster_sector = MAX(extent->next_cluster_sector,
- write_end_sector);
+ if (extent->compressed) {
+ extent->next_cluster_sector = write_end_sector;
+ } else {
+ extent->next_cluster_sector = MAX(extent->next_cluster_sector,
+ write_end_sector);
+ }
if (ret != write_len) {
ret = ret < 0 ? ret : -EIO;
@@ -1632,7 +1636,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
assert(bs == NULL);
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
@@ -1905,8 +1909,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
ret = -ENOENT;
goto exit;
}
- ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, NULL,
- errp);
+ ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, errp);
g_free(full_backing);
if (ret != 0) {
goto exit;
@@ -1977,7 +1980,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
}
assert(new_bs == NULL);
ret = bdrv_open(&new_bs, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+ BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
diff --git a/block/vpc.c b/block/vpc.c
index 3e385d9fb9..2b3b518d1c 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -794,7 +794,7 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
goto out;
}
ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
- NULL, &local_err);
+ &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
diff --git a/block/vvfat.c b/block/vvfat.c
index 206869712e..7ddc962436 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2926,6 +2926,8 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp)
QemuOpts *opts = NULL;
int ret;
int size = sector2cluster(s, s->sector_count);
+ QDict *options;
+
s->used_clusters = calloc(size, 1);
array_init(&(s->commits), sizeof(commit_t));
@@ -2956,9 +2958,11 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp)
}
s->qcow = NULL;
- ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, NULL,
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str("qcow"));
+ ret = bdrv_open(&s->qcow, s->qcow_filename, NULL, options,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH,
- bdrv_qcow, errp);
+ errp);
if (ret < 0) {
goto err;
}
diff --git a/blockdev.c b/blockdev.c
index 6b48be60ba..32b04b478c 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1422,9 +1422,8 @@ typedef struct ExternalSnapshotState {
static void external_snapshot_prepare(BlkTransactionState *common,
Error **errp)
{
- BlockDriver *drv;
int flags, ret;
- QDict *options = NULL;
+ QDict *options;
Error *local_err = NULL;
bool has_device = false;
const char *device;
@@ -1459,12 +1458,6 @@ static void external_snapshot_prepare(BlkTransactionState *common,
}
/* start processing */
- drv = bdrv_find_format(format);
- if (!drv) {
- error_setg(errp, QERR_INVALID_BLOCK_FORMAT, format);
- return;
- }
-
state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
@@ -1523,17 +1516,18 @@ static void external_snapshot_prepare(BlkTransactionState *common,
}
}
+ options = qdict_new();
if (has_snapshot_node_name) {
- options = qdict_new();
qdict_put(options, "node-name",
qstring_from_str(snapshot_node_name));
}
+ qdict_put(options, "driver", qstring_from_str(format));
/* TODO Inherit bs->options or only take explicit options with an
* extended QMP command? */
assert(state->new_bs == NULL);
ret = bdrv_open(&state->new_bs, new_image_file, NULL, options,
- flags | BDRV_O_NO_BACKING, drv, &local_err);
+ flags | BDRV_O_NO_BACKING, &local_err);
/* We will manually add the backing_hd field to the bs later */
if (ret != 0) {
error_propagate(errp, local_err);
@@ -1895,13 +1889,19 @@ void qmp_block_passwd(bool has_device, const char *device,
/* Assumes AioContext is held */
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
- int bdrv_flags, BlockDriver *drv,
+ int bdrv_flags, const char *format,
const char *password, Error **errp)
{
Error *local_err = NULL;
+ QDict *options = NULL;
int ret;
- ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err);
+ if (format) {
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str(format));
+ }
+
+ ret = bdrv_open(&bs, filename, NULL, options, bdrv_flags, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
return;
@@ -1916,7 +1916,6 @@ void qmp_change_blockdev(const char *device, const char *filename,
BlockBackend *blk;
BlockDriverState *bs;
AioContext *aio_context;
- BlockDriver *drv = NULL;
int bdrv_flags;
Error *err = NULL;
@@ -1931,14 +1930,6 @@ void qmp_change_blockdev(const char *device, const char *filename,
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
- if (format) {
- drv = bdrv_find_whitelisted_format(format, bs->read_only);
- if (!drv) {
- error_setg(errp, QERR_INVALID_BLOCK_FORMAT, format);
- goto out;
- }
- }
-
eject_device(blk, 0, &err);
if (err) {
error_propagate(errp, err);
@@ -1948,7 +1939,7 @@ void qmp_change_blockdev(const char *device, const char *filename,
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
- qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
+ qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, format, NULL, errp);
out:
aio_context_release(aio_context);
@@ -2466,7 +2457,7 @@ void qmp_drive_backup(const char *device, const char *target,
BlockDriverState *source = NULL;
BdrvDirtyBitmap *bmap = NULL;
AioContext *aio_context;
- BlockDriver *drv = NULL;
+ QDict *options = NULL;
Error *local_err = NULL;
int flags;
int64_t size;
@@ -2506,13 +2497,6 @@ void qmp_drive_backup(const char *device, const char *target,
if (!has_format) {
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
}
- if (format) {
- drv = bdrv_find_format(format);
- if (!drv) {
- error_setg(errp, QERR_INVALID_BLOCK_FORMAT, format);
- goto out;
- }
- }
/* Early check to avoid creating target */
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
@@ -2540,7 +2524,7 @@ void qmp_drive_backup(const char *device, const char *target,
}
if (mode != NEW_IMAGE_MODE_EXISTING) {
- assert(format && drv);
+ assert(format);
if (source) {
bdrv_img_create(target, format, source->filename,
source->drv->format_name, NULL,
@@ -2556,8 +2540,13 @@ void qmp_drive_backup(const char *device, const char *target,
goto out;
}
+ if (format) {
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str(format));
+ }
+
target_bs = NULL;
- ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err);
+ ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
@@ -2663,9 +2652,8 @@ void qmp_drive_mirror(const char *device, const char *target,
BlockDriverState *bs;
BlockDriverState *source, *target_bs;
AioContext *aio_context;
- BlockDriver *drv = NULL;
Error *local_err = NULL;
- QDict *options = NULL;
+ QDict *options;
int flags;
int64_t size;
int ret;
@@ -2722,13 +2710,6 @@ void qmp_drive_mirror(const char *device, const char *target,
if (!has_format) {
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
}
- if (format) {
- drv = bdrv_find_format(format);
- if (!drv) {
- error_setg(errp, QERR_INVALID_BLOCK_FORMAT, format);
- goto out;
- }
- }
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) {
goto out;
@@ -2783,7 +2764,7 @@ void qmp_drive_mirror(const char *device, const char *target,
&& mode != NEW_IMAGE_MODE_EXISTING)
{
/* create new image w/o backing file */
- assert(format && drv);
+ assert(format);
bdrv_img_create(target, format,
NULL, NULL, NULL, size, flags, &local_err, false);
} else {
@@ -2807,17 +2788,20 @@ void qmp_drive_mirror(const char *device, const char *target,
goto out;
}
+ options = qdict_new();
if (has_node_name) {
- options = qdict_new();
qdict_put(options, "node-name", qstring_from_str(node_name));
}
+ if (format) {
+ qdict_put(options, "driver", qstring_from_str(format));
+ }
/* Mirroring takes care of copy-on-write using the source's backing
* file.
*/
target_bs = NULL;
ret = bdrv_open(&target_bs, target, NULL, options,
- flags | BDRV_O_NO_BACKING, drv, &local_err);
+ flags | BDRV_O_NO_BACKING, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
diff --git a/include/block/block.h b/include/block/block.h
index 0acd104051..ef67353108 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -147,6 +147,7 @@ typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
typedef struct BDRVReopenState {
BlockDriverState *bs;
int flags;
+ QDict *options;
void *opaque;
} BDRVReopenState;
@@ -193,8 +194,6 @@ BlockDriver *bdrv_find_protocol(const char *filename,
bool allow_protocol_prefix,
Error **errp);
BlockDriver *bdrv_find_format(const char *format_name);
-BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
- bool readonly);
int bdrv_create(BlockDriver *drv, const char* filename,
QemuOpts *opts, Error **errp);
int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
@@ -218,10 +217,10 @@ void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd);
int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp);
int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp);
int bdrv_open(BlockDriverState **pbs, const char *filename,
- const char *reference, QDict *options, int flags,
- BlockDriver *drv, Error **errp);
+ const char *reference, QDict *options, int flags, Error **errp);
BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
- BlockDriverState *bs, int flags);
+ BlockDriverState *bs,
+ QDict *options, int flags);
int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);
int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);
int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index 53477e1e17..d6572a8585 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -1979,6 +1979,95 @@ static const cmdinfo_t map_cmd = {
.oneline = "prints the allocated areas of a file",
};
+static void reopen_help(void)
+{
+ printf(
+"\n"
+" Changes the open options of an already opened image\n"
+"\n"
+" Example:\n"
+" 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
+"\n"
+" -r, -- Reopen the image read-only\n"
+" -c, -- Change the cache mode to the given value\n"
+" -o, -- Changes block driver options (cf. 'open' command)\n"
+"\n");
+}
+
+static int reopen_f(BlockBackend *blk, int argc, char **argv);
+
+static QemuOptsList reopen_opts = {
+ .name = "reopen",
+ .merge_lists = true,
+ .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
+ .desc = {
+ /* no elements => accept any params */
+ { /* end of list */ }
+ },
+};
+
+static const cmdinfo_t reopen_cmd = {
+ .name = "reopen",
+ .argmin = 0,
+ .argmax = -1,
+ .cfunc = reopen_f,
+ .args = "[-r] [-c cache] [-o options]",
+ .oneline = "reopens an image with new options",
+ .help = reopen_help,
+};
+
+static int reopen_f(BlockBackend *blk, int argc, char **argv)
+{
+ BlockDriverState *bs = blk_bs(blk);
+ QemuOpts *qopts;
+ QDict *opts;
+ int c;
+ int flags = bs->open_flags;
+
+ BlockReopenQueue *brq;
+ Error *local_err = NULL;
+
+ while ((c = getopt(argc, argv, "c:o:r")) != -1) {
+ switch (c) {
+ case 'c':
+ if (bdrv_parse_cache_flags(optarg, &flags) < 0) {
+ error_report("Invalid cache option: %s", optarg);
+ return 0;
+ }
+ break;
+ case 'o':
+ if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
+ qemu_opts_reset(&reopen_opts);
+ return 0;
+ }
+ break;
+ case 'r':
+ flags &= ~BDRV_O_RDWR;
+ break;
+ default:
+ qemu_opts_reset(&reopen_opts);
+ return qemuio_command_usage(&reopen_cmd);
+ }
+ }
+
+ if (optind != argc) {
+ qemu_opts_reset(&reopen_opts);
+ return qemuio_command_usage(&reopen_cmd);
+ }
+
+ qopts = qemu_opts_find(&reopen_opts, NULL);
+ opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
+ qemu_opts_reset(&reopen_opts);
+
+ brq = bdrv_reopen_queue(NULL, bs, opts, flags);
+ bdrv_reopen_multiple(brq, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ }
+
+ return 0;
+}
+
static int break_f(BlockBackend *blk, int argc, char **argv)
{
int ret;
@@ -2266,6 +2355,7 @@ static void __attribute((constructor)) init_qemuio_commands(void)
qemuio_add_command(&discard_cmd);
qemuio_add_command(&alloc_cmd);
qemuio_add_command(&map_cmd);
+ qemuio_add_command(&reopen_cmd);
qemuio_add_command(&break_cmd);
qemuio_add_command(&remove_break_cmd);
qemuio_add_command(&resume_cmd);
diff --git a/qemu-io.c b/qemu-io.c
index f1e3a67135..269f17cc2c 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -156,7 +156,6 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
break;
case 'o':
if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
- printf("could not parse option list -- %s\n", optarg);
qemu_opts_reset(&empty_opts);
return 0;
}
diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
index 617f3977cc..9e9b379baa 100755
--- a/tests/qemu-iotests/039
+++ b/tests/qemu-iotests/039
@@ -147,6 +147,33 @@ $PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
_check_test_img
TEST_IMG="$TEST_IMG".base _check_test_img
+echo
+echo "== Changing lazy_refcounts setting at runtime =="
+
+IMGOPTS="compat=1.1,lazy_refcounts=off"
+_make_test_img $size
+
+$QEMU_IO -c "reopen -o lazy-refcounts=on" \
+ -c "write -P 0x5a 0 512" \
+ -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+ | _filter_qemu_io
+
+# The dirty bit must be set
+$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
+_check_test_img
+
+IMGOPTS="compat=1.1,lazy_refcounts=on"
+_make_test_img $size
+
+$QEMU_IO -c "reopen -o lazy-refcounts=off" \
+ -c "write -P 0x5a 0 512" \
+ -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+ | _filter_qemu_io
+
+# The dirty bit must not be set
+$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
+_check_test_img
+
# success, all done
echo "*** done"
diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
index d8c5a44519..03a31c5943 100644
--- a/tests/qemu-iotests/039.out
+++ b/tests/qemu-iotests/039.out
@@ -74,4 +74,22 @@ incompatible_features 0x0
incompatible_features 0x0
No errors were found on the image.
No errors were found on the image.
+
+== Changing lazy_refcounts setting at runtime ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Killed ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
+incompatible_features 0x1
+ERROR cluster 5 refcount=0 reference=1
+ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
+
+2 errors were found on the image.
+Data may be corrupted, or further writes to the image may corrupt it.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Killed ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
+incompatible_features 0x0
+No errors were found on the image.
*** done
diff --git a/tests/qemu-iotests/137 b/tests/qemu-iotests/137
new file mode 100755
index 0000000000..9a6597cf9d
--- /dev/null
+++ b/tests/qemu-iotests/137
@@ -0,0 +1,145 @@
+#!/bin/bash
+#
+# Test qcow2 reopen
+#
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# 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=kwolf@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+here="$PWD"
+tmp=/tmp/$$
+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
+. ./common.qemu
+
+_supported_fmt qcow2
+_supported_proto generic
+_supported_os Linux
+
+
+_make_test_img 64M
+
+echo === Try setting valid values for all options ===
+echo
+
+# Try all options and then check that all of the basic I/O operations still
+# work on this image.
+$QEMU_IO \
+ -c "reopen -o lazy-refcounts=on,pass-discard-request=on" \
+ -c "reopen -o lazy-refcounts=off,pass-discard-request=off" \
+ -c "reopen -o pass-discard-snapshot=on,pass-discard-other=on" \
+ -c "reopen -o pass-discard-snapshot=off,pass-discard-other=off" \
+ -c "reopen -o overlap-check=all" \
+ -c "reopen -o overlap-check=none" \
+ -c "reopen -o overlap-check=cached" \
+ -c "reopen -o overlap-check=constant" \
+ -c "reopen -o overlap-check.template=all" \
+ -c "reopen -o overlap-check.template=none" \
+ -c "reopen -o overlap-check.template=cached" \
+ -c "reopen -o overlap-check.template=constant" \
+ -c "reopen -o overlap-check.main-header=on" \
+ -c "reopen -o overlap-check.main-header=off" \
+ -c "reopen -o overlap-check.active-l1=on" \
+ -c "reopen -o overlap-check.active-l1=off" \
+ -c "reopen -o overlap-check.active-l2=on" \
+ -c "reopen -o overlap-check.active-l2=off" \
+ -c "reopen -o overlap-check.refcount-table=on" \
+ -c "reopen -o overlap-check.refcount-table=off" \
+ -c "reopen -o overlap-check.refcount-block=on" \
+ -c "reopen -o overlap-check.refcount-block=off" \
+ -c "reopen -o overlap-check.snapshot-table=on" \
+ -c "reopen -o overlap-check.snapshot-table=off" \
+ -c "reopen -o overlap-check.inactive-l1=on" \
+ -c "reopen -o overlap-check.inactive-l1=off" \
+ -c "reopen -o overlap-check.inactive-l2=on" \
+ -c "reopen -o overlap-check.inactive-l2=off" \
+ -c "reopen -o cache-size=1M" \
+ -c "reopen -o l2-cache-size=512k" \
+ -c "reopen -o refcount-cache-size=128k" \
+ -c "reopen -o cache-clean-interval=5" \
+ -c "reopen -o cache-clean-interval=0" \
+ -c "reopen -o cache-clean-interval=10" \
+ \
+ -c "write -P 55 0 32M" \
+ -c "read -P 55 0 32M" \
+ -c "discard 0 32M" \
+ -c "write -z 0 32M" \
+ -c "read -P 0 0 32M" \
+ \
+ "$TEST_IMG" | _filter_qemu_io
+
+
+echo
+echo === Try setting some invalid values ===
+echo
+
+$QEMU_IO \
+ -c "reopen -o lazy-refcounts=42" \
+ -c "reopen -o cache-size=1M,l2-cache-size=64k,refcount-cache-size=64k" \
+ -c "reopen -o cache-size=1M,l2-cache-size=2M" \
+ -c "reopen -o cache-size=1M,refcount-cache-size=2M" \
+ -c "reopen -o l2-cache-size=256T" \
+ -c "reopen -o refcount-cache-size=256T" \
+ -c "reopen -o overlap-check=constant,overlap-check.template=all" \
+ -c "reopen -o overlap-check=blubb" \
+ -c "reopen -o overlap-check.template=blubb" \
+ -c "reopen -o cache-clean-interval=-1" \
+ "$TEST_IMG" | _filter_qemu_io
+
+echo
+echo === Test transaction semantics ===
+echo
+
+# Whether lazy-refcounts was actually enabled can easily be tested: Check if
+# the dirty bit is set after a crash
+$QEMU_IO \
+ -c "reopen -o lazy-refcounts=on,overlap-check=blubb" \
+ -c "write -P 0x5a 0 512" \
+ -c "sigraise $(kill -l KILL)" \
+ "$TEST_IMG" 2>&1 | _filter_qemu_io
+
+# The dirty bit must not be set
+$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
+
+# Similarly we can test whether corruption detection has been enabled:
+# Create L1/L2, overwrite first entry in refcount block, allocate something.
+# Disabling the checks should fail, so the corruption must be detected.
+_make_test_img 64M
+$QEMU_IO -c "write 0 64k" "$TEST_IMG" | _filter_qemu_io
+poke_file "$TEST_IMG" "$((0x20000))" "\x00\x00"
+$QEMU_IO \
+ -c "reopen -o overlap-check=none,lazy-refcounts=42" \
+ -c "write 64k 64k" \
+ "$TEST_IMG" 2>&1 | _filter_qemu_io
+
+# success, all done
+echo '*** done'
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/137.out b/tests/qemu-iotests/137.out
new file mode 100644
index 0000000000..cf55a41d8a
--- /dev/null
+++ b/tests/qemu-iotests/137.out
@@ -0,0 +1,42 @@
+QA output created by 137
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
+=== Try setting valid values for all options ===
+
+wrote 33554432/33554432 bytes at offset 0
+32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 33554432/33554432 bytes at offset 0
+32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+discard 33554432/33554432 bytes at offset 0
+32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+wrote 33554432/33554432 bytes at offset 0
+32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+read 33554432/33554432 bytes at offset 0
+32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+=== Try setting some invalid values ===
+
+Parameter 'lazy-refcounts' expects 'on' or 'off'
+cache-size, l2-cache-size and refcount-cache-size may not be set the same time
+l2-cache-size may not exceed cache-size
+refcount-cache-size may not exceed cache-size
+L2 cache size too big
+L2 cache size too big
+Conflicting values for qcow2 options 'overlap-check' ('constant') and 'overlap-check.template' ('all')
+Unsupported value 'blubb' for qcow2 option 'overlap-check'. Allowed are any of the following: none, constant, cached, all
+Unsupported value 'blubb' for qcow2 option 'overlap-check'. Allowed are any of the following: none, constant, cached, all
+Cache clean interval too big
+
+=== Test transaction semantics ===
+
+Unsupported value 'blubb' for qcow2 option 'overlap-check'. Allowed are any of the following: none, constant, cached, all
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Killed ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
+incompatible_features 0x0
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
+wrote 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Parameter 'lazy-refcounts' expects 'on' or 'off'
+qcow2: Marking image as corrupt: Preventing invalid write on metadata (overlaps with qcow2_header); further corruption events will be suppressed
+write failed: Input/output error
+*** done
diff --git a/tests/qemu-iotests/138 b/tests/qemu-iotests/138
new file mode 100755
index 0000000000..a5c3464d58
--- /dev/null
+++ b/tests/qemu-iotests/138
@@ -0,0 +1,73 @@
+#!/bin/bash
+#
+# General test case for qcow2's image check
+#
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# 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=mreitz@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+here="$PWD"
+tmp=/tmp/$$
+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
+
+# This tests qocw2-specific low-level functionality
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+echo
+echo '=== Check on an image with a multiple of 2^32 clusters ==='
+echo
+
+IMGOPTS=$(_optstr_add "$IMGOPTS" "cluster_size=512") \
+ _make_test_img 512
+
+# Allocate L2 table
+$QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io
+
+# Put the data cluster at a multiple of 2 TB, resulting in the image apparently
+# having a multiple of 2^32 clusters
+# (To be more specific: It is at 32 PB)
+poke_file "$TEST_IMG" 2048 "\x80\x80\x00\x00\x00\x00\x00\x00"
+
+# An offset of 32 PB results in qemu-img check having to allocate an in-memory
+# refcount table of 128 TB (16 bit refcounts, 512 byte clusters).
+# This should be generally too much for any system and thus fail.
+# What this test is checking is that the qcow2 driver actually tries to allocate
+# such a large amount of memory (and is consequently aborting) instead of having
+# truncated the cluster count somewhere (which would result in much less memory
+# being allocated and then a segfault occurring).
+_check_test_img
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/138.out b/tests/qemu-iotests/138.out
new file mode 100644
index 0000000000..3fe911f85a
--- /dev/null
+++ b/tests/qemu-iotests/138.out
@@ -0,0 +1,9 @@
+QA output created by 138
+
+=== Check on an image with a multiple of 2^32 clusters ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=512
+wrote 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+qemu-img: Check failed: Cannot allocate memory
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index c430b6c234..439b1d237d 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -134,3 +134,5 @@
132 rw auto quick
134 rw auto quick
135 rw auto
+137 rw auto
+138 rw auto quick
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 00:37:54 +0000