return !(bs->open_flags & BDRV_O_RDWR);
}
-static int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only,
- bool ignore_allow_rdw, Error **errp)
+static int GRAPH_RDLOCK
+bdrv_can_set_read_only(BlockDriverState *bs, bool read_only,
+ bool ignore_allow_rdw, Error **errp)
{
IO_CODE();
* setting @errp. In all other cases, NULL will only be returned with
* @errp set.
*/
-static char *bdrv_make_absolute_filename(BlockDriverState *relative_to,
- const char *filename, Error **errp)
+static char * GRAPH_RDLOCK
+bdrv_make_absolute_filename(BlockDriverState *relative_to,
+ const char *filename, Error **errp)
{
char *dir, *full_name;
return g_strdup_printf("node '%s'", bdrv_get_node_name(parent));
}
-static void bdrv_child_cb_drained_begin(BdrvChild *child)
+static void GRAPH_RDLOCK bdrv_child_cb_drained_begin(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
bdrv_do_drained_begin_quiesce(bs, NULL);
}
-static bool bdrv_child_cb_drained_poll(BdrvChild *child)
+static bool GRAPH_RDLOCK bdrv_child_cb_drained_poll(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
return bdrv_drain_poll(bs, NULL, false);
}
-static void bdrv_child_cb_drained_end(BdrvChild *child)
+static void GRAPH_RDLOCK bdrv_child_cb_drained_end(BdrvChild *child)
{
BlockDriverState *bs = child->opaque;
bdrv_drained_end(bs);
*child_flags &= ~BDRV_O_NATIVE_AIO;
}
-static void bdrv_backing_attach(BdrvChild *c)
+static void GRAPH_WRLOCK bdrv_backing_attach(BdrvChild *c)
{
BlockDriverState *parent = c->opaque;
BlockDriverState *backing_hd = c->bs;
}
if (file != NULL) {
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(blk_bs(file));
+ bdrv_graph_rdunlock_main_loop();
+
filename = blk_bs(file)->filename;
} else {
/*
if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, ro)) {
if (!ro && bdrv_is_whitelisted(drv, true)) {
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, NULL, NULL);
+ bdrv_graph_rdunlock_main_loop();
} else {
ret = -ENOTSUP;
}
{
assert(!child->bs);
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
assert(!child->next.le_prev); /* not in children list */
g_free(child->name);
implicit_backing = !strcmp(bs->auto_backing_file, bs->backing_file);
}
+ bdrv_graph_rdlock_main_loop();
backing_filename = bdrv_get_full_backing_filename(bs, &local_err);
+ bdrv_graph_rdunlock_main_loop();
+
if (local_err) {
ret = -EINVAL;
error_propagate(errp, local_err);
}
if (implicit_backing) {
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(backing_hd);
+ bdrv_graph_rdunlock_main_loop();
pstrcpy(bs->auto_backing_file, sizeof(bs->auto_backing_file),
backing_hd->filename);
}
/*
* Returns true if @child can be reached recursively from @bs
*/
-static bool bdrv_recurse_has_child(BlockDriverState *bs,
- BlockDriverState *child)
+static bool GRAPH_RDLOCK
+bdrv_recurse_has_child(BlockDriverState *bs, BlockDriverState *child)
{
BdrvChild *c;
*
* To be called with bs->aio_context locked.
*/
-static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
- BlockDriverState *bs,
- QDict *options,
- const BdrvChildClass *klass,
- BdrvChildRole role,
- bool parent_is_format,
- QDict *parent_options,
- int parent_flags,
- bool keep_old_opts)
+static BlockReopenQueue * GRAPH_RDLOCK
+bdrv_reopen_queue_child(BlockReopenQueue *bs_queue, BlockDriverState *bs,
+ QDict *options, const BdrvChildClass *klass,
+ BdrvChildRole role, bool parent_is_format,
+ QDict *parent_options, int parent_flags,
+ bool keep_old_opts)
{
assert(bs != NULL);
GLOBAL_STATE_CODE();
+ /*
+ * Strictly speaking, draining is illegal under GRAPH_RDLOCK. We know that
+ * we've been called with bdrv_graph_rdlock_main_loop(), though, so it's ok
+ * in practice.
+ */
bdrv_drained_begin(bs);
if (bs_queue == NULL) {
QDict *options, bool keep_old_opts)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
return bdrv_reopen_queue_child(bs_queue, bs, options, NULL, 0, false,
NULL, 0, keep_old_opts);
* Callers must make sure that their AioContext locking is still correct after
* this.
*/
-static int bdrv_reopen_parse_file_or_backing(BDRVReopenState *reopen_state,
- bool is_backing, Transaction *tran,
- Error **errp)
+static int GRAPH_UNLOCKED
+bdrv_reopen_parse_file_or_backing(BDRVReopenState *reopen_state,
+ bool is_backing, Transaction *tran,
+ Error **errp)
{
BlockDriverState *bs = reopen_state->bs;
BlockDriverState *new_child_bs;
QObject *value;
const char *str;
AioContext *ctx, *old_ctx;
+ bool has_child;
int ret;
GLOBAL_STATE_CODE();
new_child_bs = bdrv_lookup_bs(NULL, str, errp);
if (new_child_bs == NULL) {
return -EINVAL;
- } else if (bdrv_recurse_has_child(new_child_bs, bs)) {
+ }
+
+ bdrv_graph_rdlock_main_loop();
+ has_child = bdrv_recurse_has_child(new_child_bs, bs);
+ bdrv_graph_rdunlock_main_loop();
+
+ if (has_child) {
error_setg(errp, "Making '%s' a %s child of '%s' would create a "
"cycle", str, child_name, bs->node_name);
return -EINVAL;
* After calling this function, the transaction @change_child_tran may only be
* completed while holding a writer lock for the graph.
*/
-static int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
- BlockReopenQueue *queue,
- Transaction *change_child_tran, Error **errp)
+static int GRAPH_UNLOCKED
+bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
+ Transaction *change_child_tran, Error **errp)
{
int ret = -1;
int old_flags;
* to r/w. Attempting to set to r/w may fail if either BDRV_O_ALLOW_RDWR is
* not set, or if the BDS still has copy_on_read enabled */
read_only = !(reopen_state->flags & BDRV_O_RDWR);
+
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_can_set_read_only(reopen_state->bs, read_only, true, &local_err);
+ bdrv_graph_rdunlock_main_loop();
if (local_err) {
error_propagate(errp, local_err);
goto error;
if (local_err != NULL) {
error_propagate(errp, local_err);
} else {
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(reopen_state->bs);
+ bdrv_graph_rdunlock_main_loop();
error_setg(errp, "failed while preparing to reopen image '%s'",
reopen_state->bs->filename);
}
} else {
/* It is currently mandatory to have a bdrv_reopen_prepare()
* handler for each supported drv. */
+ bdrv_graph_rdlock_main_loop();
error_setg(errp, "Block format '%s' used by node '%s' "
"does not support reopening files", drv->format_name,
bdrv_get_device_or_node_name(reopen_state->bs));
+ bdrv_graph_rdunlock_main_loop();
ret = -1;
goto error;
}
if (qdict_size(reopen_state->options)) {
const QDictEntry *entry = qdict_first(reopen_state->options);
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
do {
QObject *new = entry->value;
QObject *old = qdict_get(reopen_state->bs->options, entry->key);
* makes them final by swapping the staging BlockDriverState contents into
* the active BlockDriverState contents.
*/
-static void bdrv_reopen_commit(BDRVReopenState *reopen_state)
+static void GRAPH_UNLOCKED bdrv_reopen_commit(BDRVReopenState *reopen_state)
{
BlockDriver *drv;
BlockDriverState *bs;
drv->bdrv_reopen_commit(reopen_state);
}
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
/* set BDS specific flags now */
qobject_unref(bs->explicit_options);
qobject_unref(bs->options);
qdict_del(bs->explicit_options, "backing");
qdict_del(bs->options, "backing");
- bdrv_graph_rdlock_main_loop();
bdrv_refresh_limits(bs, NULL, NULL);
- bdrv_graph_rdunlock_main_loop();
bdrv_refresh_total_sectors(bs, bs->total_sectors);
}
* Abort the reopen, and delete and free the staged changes in
* reopen_state
*/
-static void bdrv_reopen_abort(BDRVReopenState *reopen_state)
+static void GRAPH_UNLOCKED bdrv_reopen_abort(BDRVReopenState *reopen_state)
{
BlockDriver *drv;
bdrv_ref(top);
bdrv_drained_begin(base);
+ bdrv_graph_rdlock_main_loop();
if (!top->drv || !base->drv) {
goto exit;
backing_file_str = base->filename;
}
- bdrv_graph_rdlock_main_loop();
QLIST_FOREACH(c, &top->parents, next_parent) {
updated_children = g_slist_prepend(updated_children, c);
}
- bdrv_graph_rdunlock_main_loop();
/*
* It seems correct to pass detach_subchain=true here, but it triggers
ret = 0;
exit:
+ bdrv_graph_rdunlock_main_loop();
bdrv_drained_end(base);
bdrv_unref(top);
return ret;
BlockDriverState *bs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
list = NULL;
QTAILQ_FOREACH(bs, &graph_bdrv_states, node_list) {
bs->drv->bdrv_co_debug_event(bs, event);
}
-static BlockDriverState *bdrv_find_debug_node(BlockDriverState *bs)
+static BlockDriverState * GRAPH_RDLOCK
+bdrv_find_debug_node(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
while (bs && bs->drv && !bs->drv->bdrv_debug_breakpoint) {
const char *tag)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_find_debug_node(bs);
if (bs) {
return bs->drv->bdrv_debug_breakpoint(bs, event, tag);
int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_find_debug_node(bs);
if (bs) {
return bs->drv->bdrv_debug_remove_breakpoint(bs, tag);
int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
while (bs && (!bs->drv || !bs->drv->bdrv_debug_resume)) {
bs = bdrv_primary_bs(bs);
}
bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
while (bs && bs->drv && !bs->drv->bdrv_debug_is_suspended) {
bs = bdrv_primary_bs(bs);
}
BlockDriverState *bs_below;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!bs || !bs->drv || !backing_file) {
return NULL;
BdrvNextIterator it;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
}
}
-static bool bdrv_has_bds_parent(BlockDriverState *bs, bool only_active)
+static bool GRAPH_RDLOCK
+bdrv_has_bds_parent(BlockDriverState *bs, bool only_active)
{
BdrvChild *parent;
GLOBAL_STATE_CODE();
return false;
}
-static int bdrv_inactivate_recurse(BlockDriverState *bs)
+static int GRAPH_RDLOCK bdrv_inactivate_recurse(BlockDriverState *bs)
{
BdrvChild *child, *parent;
int ret;
uint64_t cumulative_perms, cumulative_shared_perms;
GLOBAL_STATE_CODE();
- GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!bs->drv) {
return -ENOMEDIUM;
GSList *aio_ctxs = NULL, *ctx;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
{
BdrvOpBlocker *blocker;
GLOBAL_STATE_CODE();
+
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
assert(bs);
assert(target);
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
/* QMP interface protects us from these cases */
assert(sync_mode != MIRROR_SYNC_MODE_INCREMENTAL);
return blk->root ? blk->root->bs : NULL;
}
-static BlockBackend *bdrv_first_blk(BlockDriverState *bs)
+static BlockBackend * GRAPH_RDLOCK bdrv_first_blk(BlockDriverState *bs)
{
BdrvChild *child;
GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
QLIST_FOREACH(child, &bs->parents, next_parent) {
if (child->klass == &child_root) {
BdrvChild *c;
GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
+
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c->klass != &child_root) {
return false;
if (qemu_in_coroutine()) {
bdrv_co_activate(bs, errp);
} else {
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
bdrv_activate(bs, errp);
}
}
{
BlockDriverState *bs = blk_bs(blk);
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!bs) {
return false;
int blk_make_empty(BlockBackend *blk, Error **errp)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!blk_is_available(blk)) {
error_setg(errp, "No medium inserted");
return -ENOMEDIUM;
int ret;
/* No write support yet */
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, NULL, errp);
+ bdrv_graph_rdunlock_main_loop();
if (ret < 0) {
return ret;
}
uint32_t offsets_size, max_compressed_block_size = 1, i;
int ret;
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, NULL, errp);
+ bdrv_graph_rdunlock_main_loop();
if (ret < 0) {
return ret;
}
Error *local_err = NULL;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!drv)
return -ENOMEDIUM;
return -EACCES;
}
- ret = bdrv_block_status(child->bs, offset, cur_bytes, pnum, map, file);
+ ret = bdrv_co_block_status(child->bs, offset, cur_bytes, pnum, map, file);
if (child == s->target) {
/*
* We refer to s->target only for areas that we've written to it.
local_flags = flags;
/* In case of failure, try to copy-on-read anyway */
- ret = bdrv_is_allocated(bs->file->bs, offset, bytes, &n);
+ ret = bdrv_co_is_allocated(bs->file->bs, offset, bytes, &n);
if (ret <= 0) {
- ret = bdrv_is_allocated_above(bdrv_backing_chain_next(bs->file->bs),
- state->bottom_bs, true, offset,
- n, &n);
+ ret = bdrv_co_is_allocated_above(bdrv_backing_chain_next(bs->file->bs),
+ state->bottom_bs, true, offset,
+ n, &n);
if (ret > 0 || ret < 0) {
local_flags |= BDRV_REQ_COPY_ON_READ;
}
errp);
}
-static int
+static int GRAPH_RDLOCK
block_crypto_amend_options_luks(BlockDriverState *bs,
QemuOpts *opts,
BlockDriverAmendStatusCB *status_cb,
QCryptoBlockAmendOptions *amend_options = NULL;
int ret = -EINVAL;
- assume_graph_lock(); /* FIXME */
-
assert(crypto);
assert(crypto->block);
const char *protocol_delimiter;
int ret;
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, "curl driver does not support writes",
errp);
+ bdrv_graph_rdunlock_main_loop();
if (ret < 0) {
return ret;
}
int64_t offset;
int ret;
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, NULL, errp);
+ bdrv_graph_rdunlock_main_loop();
if (ret < 0) {
return ret;
}
uint64_t perm;
int ret;
+ GLOBAL_STATE_CODE();
+
if (!id_wellformed(export->id)) {
error_setg(errp, "Invalid block export id");
return NULL;
* access since the export could be available before migration handover.
* ctx was acquired in the caller.
*/
+ bdrv_graph_rdlock_main_loop();
bdrv_activate(bs, NULL);
+ bdrv_graph_rdunlock_main_loop();
perm = BLK_PERM_CONSISTENT_READ;
if (export->writable) {
if (ret == -EACCES || ret == -EROFS) {
/* Try to degrade to read-only, but if it doesn't work, still use the
* normal error message. */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) {
open_flags = (open_flags & ~O_RDWR) | O_RDONLY;
s->fd = glfs_open(s->glfs, gconf->path, open_flags);
ret = s->fd ? 0 : -errno;
}
+ bdrv_graph_rdunlock_main_loop();
}
s->supports_seek_data = qemu_gluster_test_seek(s->fd);
return rd;
}
-void bdrv_graph_wrlock(BlockDriverState *bs)
+void no_coroutine_fn bdrv_graph_wrlock(BlockDriverState *bs)
{
AioContext *ctx = NULL;
GLOBAL_STATE_CODE();
assert(!qatomic_read(&has_writer));
+ assert(!qemu_in_coroutine());
/*
* Release only non-mainloop AioContext. The mainloop often relies on the
/* Maximum bounce buffer for copy-on-read and write zeroes, in bytes */
#define MAX_BOUNCE_BUFFER (32768 << BDRV_SECTOR_BITS)
-static void bdrv_parent_cb_resize(BlockDriverState *bs);
+static void coroutine_fn GRAPH_RDLOCK
+bdrv_parent_cb_resize(BlockDriverState *bs);
+
static int coroutine_fn bdrv_co_do_pwrite_zeroes(BlockDriverState *bs,
int64_t offset, int64_t bytes, BdrvRequestFlags flags);
-static void bdrv_parent_drained_begin(BlockDriverState *bs, BdrvChild *ignore)
+static void GRAPH_RDLOCK
+bdrv_parent_drained_begin(BlockDriverState *bs, BdrvChild *ignore)
{
BdrvChild *c, *next;
+ IO_OR_GS_CODE();
+ assert_bdrv_graph_readable();
QLIST_FOREACH_SAFE(c, &bs->parents, next_parent, next) {
if (c == ignore) {
}
}
-static void bdrv_parent_drained_end(BlockDriverState *bs, BdrvChild *ignore)
+static void GRAPH_RDLOCK
+bdrv_parent_drained_end(BlockDriverState *bs, BdrvChild *ignore)
{
BdrvChild *c;
+ IO_OR_GS_CODE();
+ assert_bdrv_graph_readable();
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c == ignore) {
bool bdrv_parent_drained_poll_single(BdrvChild *c)
{
+ IO_OR_GS_CODE();
+
if (c->klass->drained_poll) {
return c->klass->drained_poll(c);
}
return false;
}
-static bool bdrv_parent_drained_poll(BlockDriverState *bs, BdrvChild *ignore,
- bool ignore_bds_parents)
+static bool GRAPH_RDLOCK
+bdrv_parent_drained_poll(BlockDriverState *bs, BdrvChild *ignore,
+ bool ignore_bds_parents)
{
BdrvChild *c, *next;
bool busy = false;
+ IO_OR_GS_CODE();
+ assert_bdrv_graph_readable();
QLIST_FOREACH_SAFE(c, &bs->parents, next_parent, next) {
if (c == ignore || (ignore_bds_parents && c->klass->parent_is_bds)) {
c->quiesced_parent = true;
if (c->klass->drained_begin) {
+ /* called with rdlock taken, but it doesn't really need it. */
c->klass->drained_begin(c);
}
}
static bool bdrv_drain_poll_top_level(BlockDriverState *bs,
BdrvChild *ignore_parent)
{
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
return bdrv_drain_poll(bs, ignore_parent, false);
}
/* Stop things in parent-to-child order */
if (qatomic_fetch_inc(&bs->quiesce_counter) == 0) {
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
bdrv_parent_drained_begin(bs, parent);
if (bs->drv && bs->drv->bdrv_drain_begin) {
bs->drv->bdrv_drain_begin(bs);
bdrv_co_yield_to_drain(bs, false, parent, false);
return;
}
+
+ /* At this point, we should be always running in the main loop. */
+ GLOBAL_STATE_CODE();
assert(bs->quiesce_counter > 0);
GLOBAL_STATE_CODE();
/* Re-enable things in child-to-parent order */
old_quiesce_counter = qatomic_fetch_dec(&bs->quiesce_counter);
if (old_quiesce_counter == 1) {
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bs->drv && bs->drv->bdrv_drain_end) {
bs->drv->bdrv_drain_end(bs);
}
static void bdrv_drain_assert_idle(BlockDriverState *bs)
{
BdrvChild *child, *next;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
assert(qatomic_read(&bs->in_flight) == 0);
QLIST_FOREACH_SAFE(child, &bs->children, next, next) {
{
BlockDriverState *bs = NULL;
bool result = false;
+
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
/* bdrv_drain_poll() can't make changes to the graph and we are holding the
* main AioContext lock, so iterating bdrv_next_all_states() is safe. */
ret = 1; /* "already allocated", so nothing will be copied */
pnum = MIN(align_bytes, max_transfer);
} else {
- ret = bdrv_is_allocated(bs, align_offset,
- MIN(align_bytes, max_transfer), &pnum);
+ ret = bdrv_co_is_allocated(bs, align_offset,
+ MIN(align_bytes, max_transfer), &pnum);
if (ret < 0) {
/*
* Safe to treat errors in querying allocation as if
/* The flag BDRV_REQ_COPY_ON_READ has reached its addressee */
flags &= ~BDRV_REQ_COPY_ON_READ;
- ret = bdrv_is_allocated(bs, offset, bytes, &pnum);
+ ret = bdrv_co_is_allocated(bs, offset, bytes, &pnum);
if (ret < 0) {
goto out;
}
}
}
-static inline void coroutine_fn
+static inline void coroutine_fn GRAPH_RDLOCK
bdrv_co_write_req_finish(BdrvChild *child, int64_t offset, int64_t bytes,
BdrvTrackedRequest *req, int ret)
{
int result = 0;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
/*
* bdrv queue is managed by record/replay,
* set to the host mapping and BDS corresponding to the guest offset.
*/
static int coroutine_fn GRAPH_RDLOCK
-bdrv_co_block_status(BlockDriverState *bs, bool want_zero,
- int64_t offset, int64_t bytes,
- int64_t *pnum, int64_t *map, BlockDriverState **file)
+bdrv_co_do_block_status(BlockDriverState *bs, bool want_zero,
+ int64_t offset, int64_t bytes,
+ int64_t *pnum, int64_t *map, BlockDriverState **file)
{
int64_t total_size;
int64_t n; /* bytes */
if (ret & BDRV_BLOCK_RAW) {
assert(ret & BDRV_BLOCK_OFFSET_VALID && local_file);
- ret = bdrv_co_block_status(local_file, want_zero, local_map,
- *pnum, pnum, &local_map, &local_file);
+ ret = bdrv_co_do_block_status(local_file, want_zero, local_map,
+ *pnum, pnum, &local_map, &local_file);
goto out;
}
int64_t file_pnum;
int ret2;
- ret2 = bdrv_co_block_status(local_file, want_zero, local_map,
- *pnum, &file_pnum, NULL, NULL);
+ ret2 = bdrv_co_do_block_status(local_file, want_zero, local_map,
+ *pnum, &file_pnum, NULL, NULL);
if (ret2 >= 0) {
/* Ignore errors. This is just providing extra information, it
* is useful but not necessary.
return 0;
}
- ret = bdrv_co_block_status(bs, want_zero, offset, bytes, pnum, map, file);
+ ret = bdrv_co_do_block_status(bs, want_zero, offset, bytes, pnum,
+ map, file);
++*depth;
if (ret < 0 || *pnum == 0 || ret & BDRV_BLOCK_ALLOCATED || bs == base) {
return ret;
for (p = bdrv_filter_or_cow_bs(bs); include_base || p != base;
p = bdrv_filter_or_cow_bs(p))
{
- ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map,
- file);
+ ret = bdrv_co_do_block_status(p, want_zero, offset, bytes, pnum,
+ map, file);
++*depth;
if (ret < 0) {
return ret;
bytes, pnum, map, file, NULL);
}
-int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base,
- int64_t offset, int64_t bytes, int64_t *pnum,
- int64_t *map, BlockDriverState **file)
-{
- IO_CODE();
- return bdrv_common_block_status_above(bs, base, false, true, offset, bytes,
- pnum, map, file, NULL);
-}
-
-int bdrv_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes,
- int64_t *pnum, int64_t *map, BlockDriverState **file)
+int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, int64_t *pnum,
+ int64_t *map, BlockDriverState **file)
{
IO_CODE();
- return bdrv_block_status_above(bs, bdrv_filter_or_cow_bs(bs),
- offset, bytes, pnum, map, file);
+ return bdrv_co_block_status_above(bs, bdrv_filter_or_cow_bs(bs),
+ offset, bytes, pnum, map, file);
}
/*
return !!(ret & BDRV_BLOCK_ALLOCATED);
}
-int bdrv_is_allocated(BlockDriverState *bs, int64_t offset, int64_t bytes,
- int64_t *pnum)
-{
- int ret;
- int64_t dummy;
- IO_CODE();
-
- ret = bdrv_common_block_status_above(bs, bs, true, false, offset,
- bytes, pnum ? pnum : &dummy, NULL,
- NULL, NULL);
- if (ret < 0) {
- return ret;
- }
- return !!(ret & BDRV_BLOCK_ALLOCATED);
-}
-
-/* See bdrv_is_allocated_above for documentation */
-int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
- BlockDriverState *base,
- bool include_base, int64_t offset,
- int64_t bytes, int64_t *pnum)
-{
- int depth;
- int ret;
- IO_CODE();
-
- ret = bdrv_co_common_block_status_above(top, base, include_base, false,
- offset, bytes, pnum, NULL, NULL,
- &depth);
- if (ret < 0) {
- return ret;
- }
-
- if (ret & BDRV_BLOCK_ALLOCATED) {
- return depth;
- }
- return 0;
-}
-
/*
* Given an image chain: ... -> [BASE] -> [INTER1] -> [INTER2] -> [TOP]
*
* words, the result is not necessarily the maximum possible range);
* but 'pnum' will only be 0 when end of file is reached.
*/
-int bdrv_is_allocated_above(BlockDriverState *top,
- BlockDriverState *base,
- bool include_base, int64_t offset,
- int64_t bytes, int64_t *pnum)
+int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *bs,
+ BlockDriverState *base,
+ bool include_base, int64_t offset,
+ int64_t bytes, int64_t *pnum)
{
int depth;
int ret;
IO_CODE();
- ret = bdrv_common_block_status_above(top, base, include_base, false,
- offset, bytes, pnum, NULL, NULL,
- &depth);
+ ret = bdrv_co_common_block_status_above(bs, base, include_base, false,
+ offset, bytes, pnum, NULL, NULL,
+ &depth);
if (ret < 0) {
return ret;
}
bytes, read_flags, write_flags);
}
-static void bdrv_parent_cb_resize(BlockDriverState *bs)
+static void coroutine_fn GRAPH_RDLOCK
+bdrv_parent_cb_resize(BlockDriverState *bs)
{
BdrvChild *c;
+
+ assert_bdrv_graph_readable();
+
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c->klass->resize) {
c->klass->resize(c);
/* Check the write protect flag of the LUN if we want to write */
if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) &&
iscsilun->write_protected) {
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_apply_auto_read_only(bs, "LUN is write protected", errp);
+ bdrv_graph_rdunlock_main_loop();
if (ret < 0) {
goto out;
}
assert(!(offset % s->granularity));
WITH_GRAPH_RDLOCK_GUARD() {
- ret = bdrv_block_status_above(source, NULL, offset,
- nb_chunks * s->granularity,
- &io_bytes, NULL, NULL);
+ ret = bdrv_co_block_status_above(source, NULL, offset,
+ nb_chunks * s->granularity,
+ &io_bytes, NULL, NULL);
}
if (ret < 0) {
io_bytes = MIN(nb_chunks * s->granularity, max_io_bytes);
}
WITH_GRAPH_RDLOCK_GUARD() {
- ret = bdrv_is_allocated_above(bs, s->base_overlay, true, offset,
- bytes, &count);
+ ret = bdrv_co_is_allocated_above(bs, s->base_overlay, true, offset,
+ bytes, &count);
}
if (ret < 0) {
return ret;
AioContext *aio_context;
Error *local_err = NULL;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_find_node(id);
if (bs) {
qmp_blockdev_del(id, &local_err);
SnapshotEntry *snapshot_entry;
Error *err = NULL;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_all_find_vmstate_bs(NULL, false, NULL, &err);
if (!bs) {
error_report_err(err);
* Return failure if the server's advertised options are incompatible with the
* client's needs.
*/
-static int nbd_handle_updated_info(BlockDriverState *bs, Error **errp)
+static int coroutine_fn GRAPH_RDLOCK
+nbd_handle_updated_info(BlockDriverState *bs, Error **errp)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
int ret;
}
}
-static char *nfs_dirname(BlockDriverState *bs, Error **errp)
+static char * GRAPH_RDLOCK nfs_dirname(BlockDriverState *bs, Error **errp)
{
NFSClient *client = bs->opaque;
bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block));
/* Disable migration until bdrv_activate method is added */
+ bdrv_graph_rdlock_main_loop();
error_setg(&s->migration_blocker, "The Parallels format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
+ bdrv_graph_rdunlock_main_loop();
+
ret = migrate_add_blocker(s->migration_blocker, errp);
if (ret < 0) {
error_setg(errp, "Migration blocker error");
}
}
-static void blockdev_remove_medium(const char *device, const char *id,
- Error **errp)
+static void GRAPH_UNLOCKED
+blockdev_remove_medium(const char *device, const char *id, Error **errp)
{
BlockBackend *blk;
BlockDriverState *bs;
AioContext *aio_context;
bool has_attached_device;
+ GLOBAL_STATE_CODE();
+
blk = qmp_get_blk(device, id, errp);
if (!blk) {
return;
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
+ bdrv_graph_rdunlock_main_loop();
goto out;
}
+ bdrv_graph_rdunlock_main_loop();
blk_remove_bs(blk);
BlockBackend *blk;
BlockDriverState *bs;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
blk = qmp_get_blk(device, id, errp);
if (!blk) {
return;
* Helper function for other query info functions. Store information about @bs
* in @info, setting @errp on error.
*/
-static void bdrv_do_query_node_info(BlockDriverState *bs,
- BlockNodeInfo *info,
- Error **errp)
+static void GRAPH_RDLOCK
+bdrv_do_query_node_info(BlockDriverState *bs, BlockNodeInfo *info, Error **errp)
{
int64_t size;
const char *backing_filename;
}
/* @p_info will be set only on success. */
-static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
- Error **errp)
+static void GRAPH_RDLOCK
+bdrv_query_info(BlockBackend *blk, BlockInfo **p_info, Error **errp)
{
BlockInfo *info = g_malloc0(sizeof(*info));
BlockDriverState *bs = blk_bs(blk);
BlockBackend *blk;
Error *local_err = NULL;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
BlockInfoList *info;
}
/* Disable migration when qcow images are used */
+ bdrv_graph_rdlock_main_loop();
error_setg(&s->migration_blocker, "The qcow format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
+ bdrv_graph_rdunlock_main_loop();
+
ret = migrate_add_blocker(s->migration_blocker, errp);
if (ret < 0) {
error_free(s->migration_blocker);
return DIV_ROUND_UP(num_bits, 8);
}
-static int check_constraints_on_bitmap(BlockDriverState *bs,
- const char *name,
- uint32_t granularity,
- Error **errp)
+static int GRAPH_RDLOCK
+check_constraints_on_bitmap(BlockDriverState *bs, const char *name,
+ uint32_t granularity, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int granularity_bits = ctz32(granularity);
return 0;
}
-static void clear_bitmap_table(BlockDriverState *bs, uint64_t *bitmap_table,
- uint32_t bitmap_table_size)
+static void GRAPH_RDLOCK
+clear_bitmap_table(BlockDriverState *bs, uint64_t *bitmap_table,
+ uint32_t bitmap_table_size)
{
BDRVQcow2State *s = bs->opaque;
int i;
return ret;
}
-static int free_bitmap_clusters(BlockDriverState *bs, Qcow2BitmapTable *tb)
+static int GRAPH_RDLOCK
+free_bitmap_clusters(BlockDriverState *bs, Qcow2BitmapTable *tb)
{
int ret;
uint64_t *bitmap_table;
* Store bitmap list to qcow2 image as a bitmap directory.
* Everything is checked.
*/
-static int bitmap_list_store(BlockDriverState *bs, Qcow2BitmapList *bm_list,
- uint64_t *offset, uint64_t *size, bool in_place)
+static int GRAPH_RDLOCK
+bitmap_list_store(BlockDriverState *bs, Qcow2BitmapList *bm_list,
+ uint64_t *offset, uint64_t *size, bool in_place)
{
int ret;
uint8_t *dir;
* Bitmap List end
*/
-static int update_ext_header_and_dir_in_place(BlockDriverState *bs,
- Qcow2BitmapList *bm_list)
+static int GRAPH_RDLOCK
+update_ext_header_and_dir_in_place(BlockDriverState *bs,
+ Qcow2BitmapList *bm_list)
{
BDRVQcow2State *s = bs->opaque;
int ret;
*/
}
-static int update_ext_header_and_dir(BlockDriverState *bs,
- Qcow2BitmapList *bm_list)
+static int GRAPH_RDLOCK
+update_ext_header_and_dir(BlockDriverState *bs, Qcow2BitmapList *bm_list)
{
BDRVQcow2State *s = bs->opaque;
int ret;
/* store_bitmap_data()
* Store bitmap to image, filling bitmap table accordingly.
*/
-static uint64_t *store_bitmap_data(BlockDriverState *bs,
- BdrvDirtyBitmap *bitmap,
- uint32_t *bitmap_table_size, Error **errp)
+static uint64_t * GRAPH_RDLOCK
+store_bitmap_data(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
+ uint32_t *bitmap_table_size, Error **errp)
{
int ret;
BDRVQcow2State *s = bs->opaque;
* Store bm->dirty_bitmap to qcow2.
* Set bm->table_offset and bm->table_size accordingly.
*/
-static int store_bitmap(BlockDriverState *bs, Qcow2Bitmap *bm, Error **errp)
+static int GRAPH_RDLOCK
+store_bitmap(BlockDriverState *bs, Qcow2Bitmap *bm, Error **errp)
{
int ret;
uint64_t *tb;
return 0;
}
-static int qcow2_cache_flush_dependency(BlockDriverState *bs, Qcow2Cache *c)
+static int GRAPH_RDLOCK
+qcow2_cache_flush_dependency(BlockDriverState *bs, Qcow2Cache *c)
{
int ret;
return 0;
}
-static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
+static int GRAPH_RDLOCK
+qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
{
BDRVQcow2State *s = bs->opaque;
int ret = 0;
return 0;
}
-static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c,
- uint64_t offset, void **table, bool read_from_disk)
+static int GRAPH_RDLOCK
+qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
+ void **table, bool read_from_disk)
{
BDRVQcow2State *s = bs->opaque;
int i;
* the cache is used; otherwise the L2 slice is loaded from the image
* file.
*/
-static int l2_load(BlockDriverState *bs, uint64_t offset,
- uint64_t l2_offset, uint64_t **l2_slice)
+static int GRAPH_RDLOCK
+l2_load(BlockDriverState *bs, uint64_t offset,
+ uint64_t l2_offset, uint64_t **l2_slice)
{
BDRVQcow2State *s = bs->opaque;
int start_of_slice = l2_entry_size(s) *
*
*/
-static int l2_allocate(BlockDriverState *bs, int l1_index)
+static int GRAPH_RDLOCK l2_allocate(BlockDriverState *bs, int l1_index)
{
BDRVQcow2State *s = bs->opaque;
uint64_t old_l2_offset;
*
* Returns 0 on success, -errno in failure case
*/
-static int get_cluster_table(BlockDriverState *bs, uint64_t offset,
- uint64_t **new_l2_slice,
- int *new_l2_index)
+static int GRAPH_RDLOCK
+get_cluster_table(BlockDriverState *bs, uint64_t offset,
+ uint64_t **new_l2_slice, int *new_l2_index)
{
BDRVQcow2State *s = bs->opaque;
unsigned int l2_index;
*
* Returns 0 on success, -errno on failure.
*/
-static int coroutine_fn calculate_l2_meta(BlockDriverState *bs,
- uint64_t host_cluster_offset,
- uint64_t guest_offset, unsigned bytes,
- uint64_t *l2_slice, QCowL2Meta **m,
- bool keep_old)
+static int coroutine_fn GRAPH_RDLOCK
+calculate_l2_meta(BlockDriverState *bs, uint64_t host_cluster_offset,
+ uint64_t guest_offset, unsigned bytes, uint64_t *l2_slice,
+ QCowL2Meta **m, bool keep_old)
{
BDRVQcow2State *s = bs->opaque;
int sc_index, l2_index = offset_to_l2_slice_index(s, guest_offset);
*
* -errno: in error cases
*/
-static int coroutine_fn handle_copied(BlockDriverState *bs,
- uint64_t guest_offset, uint64_t *host_offset, uint64_t *bytes,
- QCowL2Meta **m)
+static int coroutine_fn GRAPH_RDLOCK
+handle_copied(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
{
BDRVQcow2State *s = bs->opaque;
int l2_index;
* function has been waiting for another request and the allocation must be
* restarted, but the whole request should not be failed.
*/
-static int coroutine_fn do_alloc_cluster_offset(BlockDriverState *bs,
- uint64_t guest_offset,
- uint64_t *host_offset,
- uint64_t *nb_clusters)
+static int coroutine_fn GRAPH_RDLOCK
+do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t *host_offset, uint64_t *nb_clusters)
{
BDRVQcow2State *s = bs->opaque;
*
* -errno: in error cases
*/
-static int coroutine_fn handle_alloc(BlockDriverState *bs,
- uint64_t guest_offset, uint64_t *host_offset, uint64_t *bytes,
- QCowL2Meta **m)
+static int coroutine_fn GRAPH_RDLOCK
+handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
+ uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
{
BDRVQcow2State *s = bs->opaque;
int l2_index;
* all clusters in the same L2 slice) and returns the number of discarded
* clusters.
*/
-static int discard_in_l2_slice(BlockDriverState *bs, uint64_t offset,
- uint64_t nb_clusters,
- enum qcow2_discard_type type, bool full_discard)
+static int GRAPH_RDLOCK
+discard_in_l2_slice(BlockDriverState *bs, uint64_t offset, uint64_t nb_clusters,
+ enum qcow2_discard_type type, bool full_discard)
{
BDRVQcow2State *s = bs->opaque;
uint64_t *l2_slice;
* all clusters in the same L2 slice) and returns the number of zeroed
* clusters.
*/
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
zero_in_l2_slice(BlockDriverState *bs, uint64_t offset,
uint64_t nb_clusters, int flags)
{
return nb_clusters;
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
zero_l2_subclusters(BlockDriverState *bs, uint64_t offset,
unsigned nb_subclusters)
{
* status_cb(). l1_entries contains the total number of L1 entries and
* *visited_l1_entries counts all visited L1 entries.
*/
-static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
- int l1_size, int64_t *visited_l1_entries,
- int64_t l1_entries,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque)
+static int GRAPH_RDLOCK
+expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
+ int l1_size, int64_t *visited_l1_entries,
+ int64_t l1_entries,
+ BlockDriverAmendStatusCB *status_cb,
+ void *cb_opaque)
{
BDRVQcow2State *s = bs->opaque;
bool is_active_l1 = (l1_table == s->l1_table);
}
-static int load_refcount_block(BlockDriverState *bs,
- int64_t refcount_block_offset,
- void **refcount_block)
+static int GRAPH_RDLOCK
+load_refcount_block(BlockDriverState *bs, int64_t refcount_block_offset,
+ void **refcount_block)
{
BDRVQcow2State *s = bs->opaque;
*
* Returns 0 on success or -errno in error case
*/
-static int alloc_refcount_block(BlockDriverState *bs,
- int64_t cluster_index, void **refcount_block)
+static int GRAPH_RDLOCK
+alloc_refcount_block(BlockDriverState *bs, int64_t cluster_index,
+ void **refcount_block)
{
BDRVQcow2State *s = bs->opaque;
unsigned int refcount_table_index;
/* XXX: cache several refcount block clusters ? */
/* @addend is the absolute value of the addend; if @decrease is set, @addend
* will be subtracted from the current refcount, otherwise it will be added */
-static int update_refcount(BlockDriverState *bs,
- int64_t offset,
- int64_t length,
- uint64_t addend,
- bool decrease,
- enum qcow2_discard_type type)
+static int GRAPH_RDLOCK
+update_refcount(BlockDriverState *bs, int64_t offset, int64_t length,
+ uint64_t addend, bool decrease, enum qcow2_discard_type type)
{
BDRVQcow2State *s = bs->opaque;
int64_t start, last, cluster_offset;
/* return < 0 if error */
-static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size,
- uint64_t max)
+static int64_t GRAPH_RDLOCK
+alloc_clusters_noref(BlockDriverState *bs, uint64_t size, uint64_t max)
{
BDRVQcow2State *s = bs->opaque;
uint64_t i, nb_clusters, refcount;
* Compares the actual reference count for each cluster in the image against the
* refcount as reported by the refcount structures on-disk.
*/
-static void coroutine_fn
+static void coroutine_fn GRAPH_RDLOCK
compare_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix, bool *rebuild,
int64_t *highest_cluster,
*
* @allocated should be set to true if a new cluster has been allocated.
*/
-typedef int (RefblockFinishOp)(BlockDriverState *bs, uint64_t **reftable,
- uint64_t reftable_index, uint64_t *reftable_size,
- void *refblock, bool refblock_empty,
- bool *allocated, Error **errp);
+typedef int /* GRAPH_RDLOCK_PTR */
+ (RefblockFinishOp)(BlockDriverState *bs, uint64_t **reftable,
+ uint64_t reftable_index, uint64_t *reftable_size,
+ void *refblock, bool refblock_empty,
+ bool *allocated, Error **errp);
/**
* This "operation" for walk_over_reftable() allocates the refblock on disk (if
* it is not empty) and inserts its offset into the new reftable. The size of
* this new reftable is increased as required.
*/
-static int alloc_refblock(BlockDriverState *bs, uint64_t **reftable,
- uint64_t reftable_index, uint64_t *reftable_size,
- void *refblock, bool refblock_empty, bool *allocated,
- Error **errp)
+static int GRAPH_RDLOCK
+alloc_refblock(BlockDriverState *bs, uint64_t **reftable,
+ uint64_t reftable_index, uint64_t *reftable_size,
+ void *refblock, bool refblock_empty, bool *allocated,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int64_t offset;
* offset specified by the new reftable's entry. It does not modify the new
* reftable or change any refcounts.
*/
-static int flush_refblock(BlockDriverState *bs, uint64_t **reftable,
- uint64_t reftable_index, uint64_t *reftable_size,
- void *refblock, bool refblock_empty, bool *allocated,
- Error **errp)
+static int GRAPH_RDLOCK
+flush_refblock(BlockDriverState *bs, uint64_t **reftable,
+ uint64_t reftable_index, uint64_t *reftable_size,
+ void *refblock, bool refblock_empty, bool *allocated,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int64_t offset;
*
* @allocated is set to true if a new cluster has been allocated.
*/
-static int walk_over_reftable(BlockDriverState *bs, uint64_t **new_reftable,
- uint64_t *new_reftable_index,
- uint64_t *new_reftable_size,
- void *new_refblock, int new_refblock_size,
- int new_refcount_bits,
- RefblockFinishOp *operation, bool *allocated,
- Qcow2SetRefcountFunc *new_set_refcount,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque, int index, int total,
- Error **errp)
+static int GRAPH_RDLOCK
+walk_over_reftable(BlockDriverState *bs, uint64_t **new_reftable,
+ uint64_t *new_reftable_index,
+ uint64_t *new_reftable_size,
+ void *new_refblock, int new_refblock_size,
+ int new_refcount_bits,
+ RefblockFinishOp *operation, bool *allocated,
+ Qcow2SetRefcountFunc *new_set_refcount,
+ BlockDriverAmendStatusCB *status_cb,
+ void *cb_opaque, int index, int total,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
uint64_t reftable_index;
return ret;
}
-static int64_t coroutine_fn get_refblock_offset(BlockDriverState *bs,
- uint64_t offset)
+static int64_t coroutine_fn GRAPH_RDLOCK
+get_refblock_offset(BlockDriverState *bs, uint64_t offset)
{
BDRVQcow2State *s = bs->opaque;
uint32_t index = offset_to_reftable_index(s, offset);
return covering_refblock_offset;
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
qcow2_discard_refcount_block(BlockDriverState *bs, uint64_t discard_block_offs)
{
BDRVQcow2State *s = bs->opaque;
* function when there are no pending requests, it does not guard against
* concurrent requests dirtying the image.
*/
-static int qcow2_mark_clean(BlockDriverState *bs)
+static int GRAPH_RDLOCK qcow2_mark_clean(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
* Marks the image as consistent, i.e., unsets the corrupt bit, and flushes
* before if necessary.
*/
-static int coroutine_fn qcow2_mark_consistent(BlockDriverState *bs)
+static int coroutine_fn GRAPH_RDLOCK
+qcow2_mark_consistent(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
QCryptoBlockOpenOptions *crypto_opts; /* Disk encryption runtime options */
} Qcow2ReopenState;
-static int qcow2_update_options_prepare(BlockDriverState *bs,
- Qcow2ReopenState *r,
- QDict *options, int flags,
- Error **errp)
+static int GRAPH_RDLOCK
+qcow2_update_options_prepare(BlockDriverState *bs, Qcow2ReopenState *r,
+ QDict *options, int flags, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
QemuOpts *opts = NULL;
qapi_free_QCryptoBlockOpenOptions(r->crypto_opts);
}
-static int coroutine_fn
+static int coroutine_fn GRAPH_RDLOCK
qcow2_update_options(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
bs->bl.pdiscard_alignment = s->cluster_size;
}
-static int qcow2_reopen_prepare(BDRVReopenState *state,
- BlockReopenQueue *queue, Error **errp)
+static int GRAPH_UNLOCKED
+qcow2_reopen_prepare(BDRVReopenState *state,BlockReopenQueue *queue,
+ Error **errp)
{
BDRVQcow2State *s = state->bs->opaque;
Qcow2ReopenState *r;
int ret;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
r = g_new0(Qcow2ReopenState, 1);
state->opaque = r;
static void qcow2_reopen_commit_post(BDRVReopenState *state)
{
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (state->flags & BDRV_O_RDWR) {
Error *local_err = NULL;
return ret;
}
-static int qcow2_inactivate(BlockDriverState *bs)
+static int GRAPH_RDLOCK qcow2_inactivate(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
int ret, result = 0;
return result;
}
-static void qcow2_do_close(BlockDriverState *bs, bool close_data_file)
+static void coroutine_mixed_fn GRAPH_RDLOCK
+qcow2_do_close(BlockDriverState *bs, bool close_data_file)
{
BDRVQcow2State *s = bs->opaque;
qemu_vfree(s->l1_table);
g_free(s->image_backing_format);
if (close_data_file && has_data_file(bs)) {
+ GLOBAL_STATE_CODE();
+ bdrv_graph_rdunlock_main_loop();
bdrv_graph_wrlock(NULL);
bdrv_unref_child(bs, s->data_file);
bdrv_graph_wrunlock();
s->data_file = NULL;
+ bdrv_graph_rdlock_main_loop();
}
qcow2_refcount_close(bs);
qcow2_free_snapshots(bs);
}
-static void qcow2_close(BlockDriverState *bs)
+static void GRAPH_UNLOCKED qcow2_close(BlockDriverState *bs)
{
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
qcow2_do_close(bs, true);
}
}
-static bool is_zero(BlockDriverState *bs, int64_t offset, int64_t bytes)
+static bool coroutine_fn GRAPH_RDLOCK
+is_zero(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
int64_t nr;
int res;
* backing file. So, we need a loop.
*/
do {
- res = bdrv_block_status_above(bs, NULL, offset, bytes, &nr, NULL, NULL);
+ res = bdrv_co_block_status_above(bs, NULL, offset, bytes, &nr, NULL, NULL);
offset += nr;
bytes -= nr;
} while (res >= 0 && (res & BDRV_BLOCK_ZERO) && nr && bytes);
return ret;
}
-static coroutine_fn int qcow2_co_pdiscard(BlockDriverState *bs,
- int64_t offset, int64_t bytes)
+static int coroutine_fn GRAPH_RDLOCK
+qcow2_co_pdiscard(BlockDriverState *bs, int64_t offset, int64_t bytes)
{
int ret;
BDRVQcow2State *s = bs->opaque;
return ret;
}
-static int make_completely_empty(BlockDriverState *bs)
+static int GRAPH_RDLOCK make_completely_empty(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
Error *local_err = NULL;
return ret;
}
-static int qcow2_make_empty(BlockDriverState *bs)
+static int GRAPH_RDLOCK qcow2_make_empty(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
uint64_t offset, end_offset;
return ret;
}
-static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
+static coroutine_fn GRAPH_RDLOCK int qcow2_co_flush_to_os(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
int ret;
return bs->drv->bdrv_co_preadv_part(bs, offset, qiov->size, qiov, 0, 0);
}
-static int qcow2_has_compressed_clusters(BlockDriverState *bs)
+static int GRAPH_RDLOCK qcow2_has_compressed_clusters(BlockDriverState *bs)
{
int64_t offset = 0;
int64_t bytes = bdrv_getlength(bs);
* Downgrades an image's version. To achieve this, any incompatible features
* have to be removed.
*/
-static int qcow2_downgrade(BlockDriverState *bs, int target_version,
- BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
- Error **errp)
+static int GRAPH_RDLOCK
+qcow2_downgrade(BlockDriverState *bs, int target_version,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int current_version = s->qcow_version;
* features of older versions, some things may have to be presented
* differently.
*/
-static int qcow2_upgrade(BlockDriverState *bs, int target_version,
- BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
- Error **errp)
+static int GRAPH_RDLOCK
+qcow2_upgrade(BlockDriverState *bs, int target_version,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
bool need_snapshot_update;
info->original_cb_opaque);
}
-static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque,
- bool force,
- Error **errp)
+static int GRAPH_RDLOCK
+qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ bool force, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int old_version = s->qcow_version, new_version = old_version;
int qcow2_mark_corrupt(BlockDriverState *bs);
int qcow2_update_header(BlockDriverState *bs);
-void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
- int64_t size, const char *message_format, ...)
- G_GNUC_PRINTF(5, 6);
+void GRAPH_RDLOCK
+qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
+ int64_t size, const char *message_format, ...)
+ G_GNUC_PRINTF(5, 6);
int qcow2_validate_table(BlockDriverState *bs, uint64_t offset,
uint64_t entries, size_t entry_len,
int coroutine_fn GRAPH_RDLOCK qcow2_refcount_init(BlockDriverState *bs);
void qcow2_refcount_close(BlockDriverState *bs);
-int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
- uint64_t *refcount);
+int GRAPH_RDLOCK qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
+ uint64_t *refcount);
-int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index,
- uint64_t addend, bool decrease,
- enum qcow2_discard_type type);
+int GRAPH_RDLOCK
+qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index,
+ uint64_t addend, bool decrease,
+ enum qcow2_discard_type type);
-int64_t qcow2_refcount_area(BlockDriverState *bs, uint64_t offset,
- uint64_t additional_clusters, bool exact_size,
- int new_refblock_index,
- uint64_t new_refblock_offset);
+int64_t GRAPH_RDLOCK
+qcow2_refcount_area(BlockDriverState *bs, uint64_t offset,
+ uint64_t additional_clusters, bool exact_size,
+ int new_refblock_index,
+ uint64_t new_refblock_offset);
-int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size);
-int64_t coroutine_fn qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
- int64_t nb_clusters);
-int64_t coroutine_fn GRAPH_RDLOCK qcow2_alloc_bytes(BlockDriverState *bs, int size);
-void qcow2_free_clusters(BlockDriverState *bs,
- int64_t offset, int64_t size,
- enum qcow2_discard_type type);
-void qcow2_free_any_cluster(BlockDriverState *bs, uint64_t l2_entry,
- enum qcow2_discard_type type);
+int64_t GRAPH_RDLOCK
+qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size);
-int qcow2_update_snapshot_refcount(BlockDriverState *bs,
- int64_t l1_table_offset, int l1_size, int addend);
+int64_t GRAPH_RDLOCK coroutine_fn
+qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
+ int64_t nb_clusters);
-int qcow2_flush_caches(BlockDriverState *bs);
-int qcow2_write_caches(BlockDriverState *bs);
+int64_t coroutine_fn GRAPH_RDLOCK qcow2_alloc_bytes(BlockDriverState *bs, int size);
+void GRAPH_RDLOCK qcow2_free_clusters(BlockDriverState *bs,
+ int64_t offset, int64_t size,
+ enum qcow2_discard_type type);
+void GRAPH_RDLOCK
+qcow2_free_any_cluster(BlockDriverState *bs, uint64_t l2_entry,
+ enum qcow2_discard_type type);
+
+int GRAPH_RDLOCK
+qcow2_update_snapshot_refcount(BlockDriverState *bs, int64_t l1_table_offset,
+ int l1_size, int addend);
+
+int GRAPH_RDLOCK qcow2_flush_caches(BlockDriverState *bs);
+int GRAPH_RDLOCK qcow2_write_caches(BlockDriverState *bs);
int coroutine_fn qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix);
int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
int64_t size);
-int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
- int64_t size, bool data_file);
+int GRAPH_RDLOCK
+qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
+ int64_t size, bool data_file);
+
int coroutine_fn qcow2_inc_refcounts_imrt(BlockDriverState *bs, BdrvCheckResult *res,
void **refcount_table,
int64_t *refcount_table_size,
int64_t offset, int64_t size);
-int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque, Error **errp);
+int GRAPH_RDLOCK
+qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
+ BlockDriverAmendStatusCB *status_cb,
+ void *cb_opaque, Error **errp);
int coroutine_fn GRAPH_RDLOCK qcow2_shrink_reftable(BlockDriverState *bs);
-int64_t coroutine_fn qcow2_get_last_cluster(BlockDriverState *bs, int64_t size);
+
+int64_t coroutine_fn GRAPH_RDLOCK
+qcow2_get_last_cluster(BlockDriverState *bs, int64_t size);
int coroutine_fn GRAPH_RDLOCK
qcow2_detect_metadata_preallocation(BlockDriverState *bs);
/* qcow2-cluster.c functions */
-int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
- bool exact_size);
+int GRAPH_RDLOCK
+qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size, bool exact_size);
int coroutine_fn GRAPH_RDLOCK
qcow2_shrink_l1_table(BlockDriverState *bs, uint64_t max_size);
-int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
+int GRAPH_RDLOCK qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
uint8_t *buf, int nb_sectors, bool enc, Error **errp);
-int qcow2_get_host_offset(BlockDriverState *bs, uint64_t offset,
- unsigned int *bytes, uint64_t *host_offset,
- QCow2SubclusterType *subcluster_type);
-int coroutine_fn qcow2_alloc_host_offset(BlockDriverState *bs, uint64_t offset,
- unsigned int *bytes,
- uint64_t *host_offset, QCowL2Meta **m);
+int GRAPH_RDLOCK
+qcow2_get_host_offset(BlockDriverState *bs, uint64_t offset,
+ unsigned int *bytes, uint64_t *host_offset,
+ QCow2SubclusterType *subcluster_type);
+
+int coroutine_fn GRAPH_RDLOCK
+qcow2_alloc_host_offset(BlockDriverState *bs, uint64_t offset,
+ unsigned int *bytes, uint64_t *host_offset,
+ QCowL2Meta **m);
+
int coroutine_fn GRAPH_RDLOCK
qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs, uint64_t offset,
int compressed_size, uint64_t *host_offset);
int coroutine_fn GRAPH_RDLOCK
qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m);
-void coroutine_fn qcow2_alloc_cluster_abort(BlockDriverState *bs, QCowL2Meta *m);
-int qcow2_cluster_discard(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, enum qcow2_discard_type type,
- bool full_discard);
+void coroutine_fn GRAPH_RDLOCK
+qcow2_alloc_cluster_abort(BlockDriverState *bs, QCowL2Meta *m);
+
+int GRAPH_RDLOCK
+qcow2_cluster_discard(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
+ enum qcow2_discard_type type, bool full_discard);
int coroutine_fn GRAPH_RDLOCK
qcow2_subcluster_zeroize(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
int flags);
-int qcow2_expand_zero_clusters(BlockDriverState *bs,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque);
+int GRAPH_RDLOCK
+qcow2_expand_zero_clusters(BlockDriverState *bs,
+ BlockDriverAmendStatusCB *status_cb,
+ void *cb_opaque);
/* qcow2-snapshot.c functions */
-int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
-int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id);
-int qcow2_snapshot_delete(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp);
+int GRAPH_RDLOCK
+qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
+
+int GRAPH_RDLOCK
+qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id);
+
+int GRAPH_RDLOCK
+qcow2_snapshot_delete(BlockDriverState *bs, const char *snapshot_id,
+ const char *name, Error **errp);
+
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab);
int qcow2_snapshot_load_tmp(BlockDriverState *bs,
const char *snapshot_id,
void qcow2_free_snapshots(BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK
qcow2_read_snapshots(BlockDriverState *bs, Error **errp);
-int qcow2_write_snapshots(BlockDriverState *bs);
+int GRAPH_RDLOCK qcow2_write_snapshots(BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK
qcow2_check_read_snapshot_table(BlockDriverState *bs, BdrvCheckResult *result,
BdrvCheckMode fix);
-int coroutine_fn qcow2_check_fix_snapshot_table(BlockDriverState *bs,
- BdrvCheckResult *result,
- BdrvCheckMode fix);
+int coroutine_fn GRAPH_RDLOCK
+qcow2_check_fix_snapshot_table(BlockDriverState *bs, BdrvCheckResult *result,
+ BdrvCheckMode fix);
/* qcow2-cache.c functions */
Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables,
int qcow2_cache_destroy(Qcow2Cache *c);
void qcow2_cache_entry_mark_dirty(Qcow2Cache *c, void *table);
-int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c);
-int qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c);
-int qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
- Qcow2Cache *dependency);
+int GRAPH_RDLOCK qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c);
+int GRAPH_RDLOCK qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c);
+int GRAPH_RDLOCK qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
+ Qcow2Cache *dependency);
void qcow2_cache_depends_on_flush(Qcow2Cache *c);
void qcow2_cache_clean_unused(Qcow2Cache *c);
-int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c);
+int GRAPH_RDLOCK qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c);
+
+int GRAPH_RDLOCK
+qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
+ void **table);
+
+int GRAPH_RDLOCK
+qcow2_cache_get_empty(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
+ void **table);
-int qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
- void **table);
-int qcow2_cache_get_empty(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
- void **table);
void qcow2_cache_put(Qcow2Cache *c, void **table);
void *qcow2_cache_is_table_offset(Qcow2Cache *c, uint64_t offset);
void qcow2_cache_discard(Qcow2Cache *c, void *table);
qcow2_load_dirty_bitmaps(BlockDriverState *bs, bool *header_updated, Error **errp);
bool qcow2_get_bitmap_info_list(BlockDriverState *bs,
Qcow2BitmapInfoList **info_list, Error **errp);
-int qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
+int GRAPH_RDLOCK qcow2_reopen_bitmaps_rw(BlockDriverState *bs, Error **errp);
+int GRAPH_RDLOCK qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp);
int coroutine_fn qcow2_truncate_bitmaps_check(BlockDriverState *bs, Error **errp);
-bool qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs,
- bool release_stored, Error **errp);
-int qcow2_reopen_bitmaps_ro(BlockDriverState *bs, Error **errp);
-bool coroutine_fn qcow2_co_can_store_new_dirty_bitmap(BlockDriverState *bs,
- const char *name,
- uint32_t granularity,
- Error **errp);
-int coroutine_fn qcow2_co_remove_persistent_dirty_bitmap(BlockDriverState *bs,
- const char *name,
- Error **errp);
+
+bool GRAPH_RDLOCK
+qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, bool release_stored,
+ Error **errp);
+
+bool coroutine_fn GRAPH_RDLOCK
+qcow2_co_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name,
+ uint32_t granularity, Error **errp);
+
+int coroutine_fn GRAPH_RDLOCK
+qcow2_co_remove_persistent_dirty_bitmap(BlockDriverState *bs, const char *name,
+ Error **errp);
+
bool qcow2_supports_persistent_dirty_bitmap(BlockDriverState *bs);
uint64_t qcow2_get_persistent_dirty_bitmap_size(BlockDriverState *bs,
uint32_t cluster_size);
end_sector - start_sector);
}
-static void quorum_report_failure(QuorumAIOCB *acb)
+static void GRAPH_RDLOCK quorum_report_failure(QuorumAIOCB *acb)
{
const char *reference = bdrv_get_device_or_node_name(acb->bs);
int64_t start_sector = acb->offset / BDRV_SECTOR_SIZE;
static int quorum_vote_error(QuorumAIOCB *acb);
-static bool quorum_has_too_much_io_failed(QuorumAIOCB *acb)
+static bool GRAPH_RDLOCK quorum_has_too_much_io_failed(QuorumAIOCB *acb)
{
BDRVQuorumState *s = acb->bs->opaque;
BDRV_REQ_ZERO_WRITE;
if (bs->probed && !bdrv_is_read_only(bs)) {
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(bs->file->bs);
+ bdrv_graph_rdunlock_main_loop();
fprintf(stderr,
"WARNING: Image format was not specified for '%s' and probing "
"guessed raw.\n"
/* If we are using an rbd snapshot, we must be r/o, otherwise
* leave as-is */
if (s->snap != NULL) {
+ bdrv_graph_rdlock_main_loop();
r = bdrv_apply_auto_read_only(bs, "rbd snapshots are read-only", errp);
+ bdrv_graph_rdunlock_main_loop();
if (r < 0) {
goto failed_post_open;
}
BDRVRBDState *s = state->bs->opaque;
int ret = 0;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (s->snap && state->flags & BDRV_O_RDWR) {
error_setg(errp,
"Cannot change node '%s' to r/w when using RBD snapshot",
while (remaining_sectors > 0) {
int64_t count;
- ret = bdrv_is_allocated_above(top->bs, base->bs, false,
- sector_num * BDRV_SECTOR_SIZE,
- remaining_sectors * BDRV_SECTOR_SIZE,
- &count);
+ ret = bdrv_co_is_allocated_above(top->bs, base->bs, false,
+ sector_num * BDRV_SECTOR_SIZE,
+ remaining_sectors * BDRV_SECTOR_SIZE,
+ &count);
if (ret < 0) {
goto out1;
}
return ret;
}
-static void secondary_do_checkpoint(BlockDriverState *bs, Error **errp)
+static void GRAPH_UNLOCKED
+secondary_do_checkpoint(BlockDriverState *bs, Error **errp)
{
BDRVReplicationState *s = bs->opaque;
BdrvChild *active_disk = bs->file;
Error *local_err = NULL;
int ret;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!s->backup_job) {
error_setg(errp, "Backup job was cancelled unexpectedly");
return;
backup_job_cleanup(bs);
}
-static bool check_top_bs(BlockDriverState *top_bs, BlockDriverState *bs)
+static bool GRAPH_RDLOCK
+check_top_bs(BlockDriverState *top_bs, BlockDriverState *bs)
{
BdrvChild *child;
Error *local_err = NULL;
BackupPerf perf = { .use_copy_range = true, .max_workers = 1 };
+ GLOBAL_STATE_CODE();
+
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
s = bs->opaque;
return;
}
+ bdrv_graph_rdlock_main_loop();
secondary_disk = hidden_disk->bs->backing;
if (!secondary_disk->bs || !bdrv_has_blk(secondary_disk->bs)) {
error_setg(errp, "The secondary disk doesn't have block backend");
+ bdrv_graph_rdunlock_main_loop();
aio_context_release(aio_context);
return;
}
+ bdrv_graph_rdunlock_main_loop();
/* verify the length */
active_length = bdrv_getlength(active_disk->bs);
/* Must be true, or the bdrv_getlength() calls would have failed */
assert(active_disk->bs->drv && hidden_disk->bs->drv);
+ bdrv_graph_rdlock_main_loop();
if (!active_disk->bs->drv->bdrv_make_empty ||
!hidden_disk->bs->drv->bdrv_make_empty) {
error_setg(errp,
"Active disk or hidden disk doesn't support make_empty");
aio_context_release(aio_context);
+ bdrv_graph_rdunlock_main_loop();
return;
}
+ bdrv_graph_rdunlock_main_loop();
/* reopen the backing file in r/w mode */
reopen_backing_file(bs, true, &local_err);
return;
}
- bdrv_graph_wrunlock();
-
/* start backup job now */
error_setg(&s->blocker,
"Block device is in use by internal backup job");
if (!top_bs || !bdrv_is_root_node(top_bs) ||
!check_top_bs(top_bs, bs)) {
error_setg(errp, "No top_bs or it is invalid");
+ bdrv_graph_wrunlock();
reopen_backing_file(bs, false, NULL);
aio_context_release(aio_context);
return;
bdrv_op_block_all(top_bs, s->blocker);
bdrv_op_unblock(top_bs, BLOCK_OP_TYPE_DATAPLANE, s->blocker);
+ bdrv_graph_wrunlock();
+
s->backup_job = backup_job_create(
NULL, s->secondary_disk->bs, s->hidden_disk->bs,
0, MIRROR_SYNC_MODE_NONE, NULL, 0, false, NULL,
* back if the given BDS does not support snapshots.
* Return NULL if there is no BDS to (safely) fall back to.
*/
-static BdrvChild *bdrv_snapshot_fallback_child(BlockDriverState *bs)
+static BdrvChild * GRAPH_RDLOCK
+bdrv_snapshot_fallback_child(BlockDriverState *bs)
{
BdrvChild *fallback = bdrv_primary_child(bs);
BdrvChild *child;
+ GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
+
/* We allow fallback only to primary child */
if (!fallback) {
return NULL;
return fallback;
}
-static BlockDriverState *bdrv_snapshot_fallback(BlockDriverState *bs)
+static BlockDriverState * GRAPH_RDLOCK
+bdrv_snapshot_fallback(BlockDriverState *bs)
{
+ GLOBAL_STATE_CODE();
return child_bs(bdrv_snapshot_fallback_child(bs));
}
return ret;
}
+ bdrv_graph_rdlock_main_loop();
fallback = bdrv_snapshot_fallback_child(bs);
+ bdrv_graph_rdunlock_main_loop();
+
if (fallback) {
QDict *options;
QDict *file_options;
* respective option (with the qdict_put_str() call above).
* Assert that .bdrv_open() has attached the right BDS as primary child.
*/
+ bdrv_graph_rdlock_main_loop();
assert(bdrv_primary_bs(bs) == fallback_bs);
+ bdrv_graph_rdunlock_main_loop();
+
bdrv_unref(fallback_bs);
return ret;
}
int bdrv_snapshot_list(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info)
{
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
BlockDriver *drv = bs->drv;
BlockDriverState *fallback_bs = bdrv_snapshot_fallback(bs);
- GLOBAL_STATE_CODE();
if (!drv) {
return -ENOMEDIUM;
}
BlockDriver *drv = bs->drv;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!drv) {
error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
}
-static int bdrv_all_get_snapshot_devices(bool has_devices, strList *devices,
- GList **all_bdrvs,
- Error **errp)
+static int GRAPH_RDLOCK
+bdrv_all_get_snapshot_devices(bool has_devices, strList *devices,
+ GList **all_bdrvs, Error **errp)
{
g_autoptr(GList) bdrvs = NULL;
}
-static bool bdrv_all_snapshots_includes_bs(BlockDriverState *bs)
+static bool GRAPH_RDLOCK bdrv_all_snapshots_includes_bs(BlockDriverState *bs)
{
+ GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
+
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
return false;
}
GList *iterbdrvs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
return false;
GList *iterbdrvs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
return -1;
{
g_autoptr(GList) bdrvs = NULL;
GList *iterbdrvs;
+ int ret;
GLOBAL_STATE_CODE();
- if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
+ bdrv_graph_rdlock_main_loop();
+ ret = bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp);
+ bdrv_graph_rdunlock_main_loop();
+
+ if (ret < 0) {
return -1;
}
BlockDriverState *bs = iterbdrvs->data;
AioContext *ctx = bdrv_get_aio_context(bs);
int ret = 0;
+ bool all_snapshots_includes_bs;
aio_context_acquire(ctx);
- if (devices || bdrv_all_snapshots_includes_bs(bs)) {
+ bdrv_graph_rdlock_main_loop();
+ all_snapshots_includes_bs = bdrv_all_snapshots_includes_bs(bs);
+ bdrv_graph_rdunlock_main_loop();
+
+ if (devices || all_snapshots_includes_bs) {
ret = bdrv_snapshot_goto(bs, name, errp);
}
aio_context_release(ctx);
if (ret < 0) {
+ bdrv_graph_rdlock_main_loop();
error_prepend(errp, "Could not load snapshot '%s' on '%s': ",
name, bdrv_get_device_or_node_name(bs));
+ bdrv_graph_rdunlock_main_loop();
return -1;
}
GList *iterbdrvs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
return -1;
{
g_autoptr(GList) bdrvs = NULL;
GList *iterbdrvs;
+
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
return -1;
GList *iterbdrvs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (bdrv_all_get_snapshot_devices(has_devices, devices, &bdrvs, errp) < 0) {
return NULL;
copy = false;
WITH_GRAPH_RDLOCK_GUARD() {
- ret = bdrv_is_allocated(unfiltered_bs, offset, STREAM_CHUNK, &n);
+ ret = bdrv_co_is_allocated(unfiltered_bs, offset, STREAM_CHUNK, &n);
if (ret == 1) {
/* Allocated in the top, no need to copy. */
} else if (ret >= 0) {
* Copy if allocated in the intermediate images. Limit to the
* known-unallocated area [offset, offset+n*BDRV_SECTOR_SIZE).
*/
- ret = bdrv_is_allocated_above(bdrv_cow_bs(unfiltered_bs),
- s->base_overlay, true,
- offset, n, &n);
+ ret = bdrv_co_is_allocated_above(bdrv_cow_bs(unfiltered_bs),
+ s->base_overlay, true,
+ offset, n, &n);
/* Finish early if end of backing file has been reached */
if (ret == 0 && n == 0) {
n = len - offset;
}
/* Disable migration when vdi images are used */
+ bdrv_graph_rdlock_main_loop();
error_setg(&s->migration_blocker, "The vdi format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
+ bdrv_graph_rdunlock_main_loop();
+
ret = migrate_add_blocker(s->migration_blocker, errp);
if (ret < 0) {
error_free(s->migration_blocker);
uint64_t signature;
Error *local_err = NULL;
+ GLOBAL_STATE_CODE();
+
ret = bdrv_open_file_child(NULL, options, "file", bs, errp);
if (ret < 0) {
return ret;
}
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
s->bat = NULL;
s->first_visible_write = true;
bool vhdx_checksum_is_valid(uint8_t *buf, size_t size, int crc_offset);
-int vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed,
- Error **errp);
+int GRAPH_RDLOCK
+vhdx_parse_log(BlockDriverState *bs, BDRVVHDXState *s, bool *flushed,
+ Error **errp);
int coroutine_fn GRAPH_RDLOCK
vhdx_log_write_and_flush(BlockDriverState *bs, BDRVVHDXState *s,
return 0;
}
-static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent,
- Error **errp)
+static int GRAPH_RDLOCK
+vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, Error **errp)
{
int ret;
size_t l1_size;
return ret;
}
-static int vmdk_open_vmfs_sparse(BlockDriverState *bs,
- BdrvChild *file,
- int flags, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_open_vmfs_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
+ Error **errp)
{
int ret;
uint32_t magic;
return 0;
}
-static int vmdk_open_se_sparse(BlockDriverState *bs,
- BdrvChild *file,
- int flags, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_open_se_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
+ Error **errp)
{
int ret;
VMDKSESparseConstHeader const_header;
return buf;
}
-static int vmdk_open_vmdk4(BlockDriverState *bs,
- BdrvChild *file,
- int flags, QDict *options, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_open_vmdk4(BlockDriverState *bs, BdrvChild *file, int flags,
+ QDict *options, Error **errp)
{
int ret;
uint32_t magic;
}
/* Open an extent file and append to bs array */
-static int vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
- char *buf, QDict *options, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags,
+ char *buf, QDict *options, Error **errp)
{
uint32_t magic;
return s;
}
-static int vmdk_parse_extents(const char *desc, BlockDriverState *bs,
- QDict *options, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_parse_extents(const char *desc, BlockDriverState *bs, QDict *options,
+ Error **errp)
{
int ret;
int matches;
char extent_opt_prefix[32];
Error *local_err = NULL;
+ GLOBAL_STATE_CODE();
+
for (p = desc; *p; p = next_line(p)) {
/* parse extent line in one of below formats:
*
ret = vmdk_add_extent(bs, extent_file, true, sectors,
0, 0, 0, 0, 0, &extent, errp);
if (ret < 0) {
+ bdrv_graph_rdunlock_main_loop();
bdrv_graph_wrlock(NULL);
bdrv_unref_child(bs, extent_file);
bdrv_graph_wrunlock();
+ bdrv_graph_rdlock_main_loop();
goto out;
}
extent->flat_start_offset = flat_offset << 9;
}
g_free(buf);
if (ret) {
+ bdrv_graph_rdunlock_main_loop();
bdrv_graph_wrlock(NULL);
bdrv_unref_child(bs, extent_file);
bdrv_graph_wrunlock();
+ bdrv_graph_rdlock_main_loop();
goto out;
}
extent = &s->extents[s->num_extents - 1];
} else if (!strcmp(type, "SESPARSE")) {
ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp);
if (ret) {
+ bdrv_graph_rdunlock_main_loop();
bdrv_graph_wrlock(NULL);
bdrv_unref_child(bs, extent_file);
bdrv_graph_wrunlock();
+ bdrv_graph_rdlock_main_loop();
goto out;
}
extent = &s->extents[s->num_extents - 1];
} else {
error_setg(errp, "Unsupported extent type '%s'", type);
+ bdrv_graph_rdunlock_main_loop();
bdrv_graph_wrlock(NULL);
bdrv_unref_child(bs, extent_file);
bdrv_graph_wrunlock();
+ bdrv_graph_rdlock_main_loop();
ret = -ENOTSUP;
goto out;
}
return ret;
}
-static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf,
- QDict *options, Error **errp)
+static int GRAPH_RDLOCK
+vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, QDict *options,
+ Error **errp)
{
int ret;
char ct[128];
return 1;
}
-static VmdkExtentInfo *vmdk_get_extent_info(VmdkExtent *extent)
+static VmdkExtentInfo * GRAPH_RDLOCK vmdk_get_extent_info(VmdkExtent *extent)
{
VmdkExtentInfo *info = g_new0(VmdkExtentInfo, 1);
return ret;
}
-static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs,
- Error **errp)
+static ImageInfoSpecific * GRAPH_RDLOCK
+vmdk_get_specific_info(BlockDriverState *bs, Error **errp)
{
int i;
BDRVVmdkState *s = bs->opaque;
}
/* Disable migration when VHD images are used */
+ bdrv_graph_rdlock_main_loop();
error_setg(&s->migration_blocker, "The vpc format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
+ bdrv_graph_rdunlock_main_loop();
+
ret = migrate_add_blocker(s->migration_blocker, errp);
if (ret < 0) {
error_free(s->migration_blocker);
QemuOpts *opts;
int ret;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
#ifdef DEBUG
vvv = s;
#endif
if (s->qcow) {
int64_t n;
int ret;
- ret = bdrv_is_allocated(s->qcow->bs, sector_num * BDRV_SECTOR_SIZE,
- (nb_sectors - i) * BDRV_SECTOR_SIZE, &n);
+ ret = bdrv_co_is_allocated(s->qcow->bs, sector_num * BDRV_SECTOR_SIZE,
+ (nb_sectors - i) * BDRV_SECTOR_SIZE, &n);
if (ret < 0) {
return ret;
}
}
for (i = 0; !was_modified && i < s->sectors_per_cluster; i++) {
- was_modified = bdrv_is_allocated(s->qcow->bs,
- (cluster2sector(s, cluster_num) +
- i) * BDRV_SECTOR_SIZE,
- BDRV_SECTOR_SIZE, NULL);
+ was_modified = bdrv_co_is_allocated(s->qcow->bs,
+ (cluster2sector(s, cluster_num) +
+ i) * BDRV_SECTOR_SIZE,
+ BDRV_SECTOR_SIZE, NULL);
}
/*
for (i = 0; i < s->sectors_per_cluster; i++) {
int res;
- res = bdrv_is_allocated(s->qcow->bs,
- (offs + i) * BDRV_SECTOR_SIZE,
- BDRV_SECTOR_SIZE, NULL);
+ res = bdrv_co_is_allocated(s->qcow->bs,
+ (offs + i) * BDRV_SECTOR_SIZE,
+ BDRV_SECTOR_SIZE, NULL);
if (res < 0) {
return -1;
}
BlockDriverState *bs;
AioContext *aio_context;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_lookup_bs(name, name, errp);
if (bs == NULL) {
return NULL;
SnapshotInfo *info = NULL;
int ret;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = qmp_get_root_bs(device, errp);
if (!bs) {
return NULL;
AioContext *aio_context;
int ret1;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
tran_add(tran, &internal_snapshot_drv, state);
device = internal->device;
AioContext *aio_context;
Error *local_error = NULL;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!state->created) {
return;
}
bool set_backing_hd = false;
int ret;
+ GLOBAL_STATE_CODE();
+
tran_add(tran, &drive_backup_drv, state);
if (!backup->has_mode) {
}
/* Early check to avoid creating target */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
+ bdrv_graph_rdunlock_main_loop();
goto out;
}
+ bdrv_graph_rdunlock_main_loop();
flags = bs->open_flags | BDRV_O_RDWR;
BlockDriverState *explicit_backing =
bdrv_skip_implicit_filters(source);
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(explicit_backing);
+ bdrv_graph_rdunlock_main_loop();
+
bdrv_img_create(backup->target, format,
explicit_backing->filename,
explicit_backing->drv->format_name, NULL,
return;
}
+ bdrv_graph_co_rdlock();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
error_setg(errp, QERR_DEVICE_IN_USE, device);
+ bdrv_graph_co_rdunlock();
return;
}
+ bdrv_graph_co_rdunlock();
blk = blk_co_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp);
if (!blk) {
Error *local_err = NULL;
int job_flags = JOB_DEFAULT;
+ GLOBAL_STATE_CODE();
+
if (base && base_node) {
error_setg(errp, "'base' and 'base-node' cannot be specified "
"at the same time");
goto out;
}
assert(bdrv_get_aio_context(base_bs) == aio_context);
+
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(base_bs);
+ bdrv_graph_rdunlock_main_loop();
}
if (bottom) {
* Check for op blockers in the whole chain between bs and base (or bottom)
*/
iter_end = bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs;
+ bdrv_graph_rdlock_main_loop();
for (iter = bs; iter && iter != iter_end;
iter = bdrv_filter_or_cow_bs(iter))
{
if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
+ bdrv_graph_rdunlock_main_loop();
goto out;
}
}
+ bdrv_graph_rdunlock_main_loop();
/* if we are streaming the entire chain, the result will have no backing
* file, and specifying one is therefore an error */
XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp)
{
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
return bdrv_get_xdbg_block_graph(errp);
}
}
/* Early check to avoid creating target */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
+ bdrv_graph_rdunlock_main_loop();
return;
}
+ bdrv_graph_rdunlock_main_loop();
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
break;
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
/* create new image with backing file */
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(explicit_backing);
+ bdrv_graph_rdunlock_main_loop();
+
bdrv_img_create(arg->target, format,
explicit_backing->filename,
explicit_backing->drv->format_name,
/* even though we are not necessarily operating on bs, we need it to
* determine if block ops are currently prohibited on the chain */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
+ bdrv_graph_rdunlock_main_loop();
goto out;
}
+ bdrv_graph_rdunlock_main_loop();
/* final sanity check */
if (!bdrv_chain_contains(bs, image_bs)) {
BlockDriverState *bs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
bs = bdrv_find_node(node_name);
if (!bs) {
AioContext *new_context;
BlockDriverState *bs;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_find_node(node_name);
if (!bs) {
error_setg(errp, "Failed to find node with node-name='%s'", node_name);
BlockJob *job;
int ret;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (job_id == NULL && !(flags & JOB_INTERNAL)) {
job_id = bdrv_get_device_name(bs);
* function. The coroutine yields after scheduling the BH and is reentered when
* the wrapped function returns.
*
- * A no_co_wrapper_bdrv_wrlock function is a no_co_wrapper function that
- * automatically takes the graph wrlock when calling the wrapped function.
+ * A no_co_wrapper_bdrv_rdlock function is a no_co_wrapper function that
+ * automatically takes the graph rdlock when calling the wrapped function. In
+ * the same way, no_co_wrapper_bdrv_wrlock functions automatically take the
+ * graph wrlock.
*
* If the first parameter of the function is a BlockDriverState, BdrvChild or
* BlockBackend pointer, the AioContext lock for it is taken in the wrapper.
*/
#define no_co_wrapper
+#define no_co_wrapper_bdrv_rdlock
#define no_co_wrapper_bdrv_wrlock
#include "block/blockjob.h"
Error **errp);
BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
const char *backing_file);
-void bdrv_refresh_filename(BlockDriverState *bs);
+void GRAPH_RDLOCK bdrv_refresh_filename(BlockDriverState *bs);
void GRAPH_RDLOCK
bdrv_refresh_limits(BlockDriverState *bs, Transaction *tran, Error **errp);
int bdrv_commit(BlockDriverState *bs);
-int bdrv_make_empty(BdrvChild *c, Error **errp);
+int GRAPH_RDLOCK bdrv_make_empty(BdrvChild *c, Error **errp);
int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file,
const char *backing_fmt, bool warn);
void bdrv_register(BlockDriver *bdrv);
*/
typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset,
int64_t total_work_size, void *opaque);
-int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts,
- BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
- bool force,
- Error **errp);
+int GRAPH_RDLOCK
+bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ bool force, Error **errp);
/* check if a named node can be replaced when doing drive-mirror */
BlockDriverState * GRAPH_RDLOCK
check_to_replace_node(BlockDriverState *parent_bs, const char *node_name,
Error **errp);
-int no_coroutine_fn bdrv_activate(BlockDriverState *bs, Error **errp);
+int no_coroutine_fn GRAPH_RDLOCK
+bdrv_activate(BlockDriverState *bs, Error **errp);
-int coroutine_fn no_co_wrapper
+int coroutine_fn no_co_wrapper_bdrv_rdlock
bdrv_co_activate(BlockDriverState *bs, Error **errp);
void bdrv_activate_all(Error **errp);
int bdrv_has_zero_init(BlockDriverState *bs);
BlockDriverState *bdrv_find_node(const char *node_name);
BlockDeviceInfoList *bdrv_named_nodes_list(bool flat, Error **errp);
-XDbgBlockGraph *bdrv_get_xdbg_block_graph(Error **errp);
+XDbgBlockGraph * GRAPH_RDLOCK bdrv_get_xdbg_block_graph(Error **errp);
BlockDriverState *bdrv_lookup_bs(const char *device,
const char *node_name,
Error **errp);
BlockDriverState *bs;
} BdrvNextIterator;
-BlockDriverState *bdrv_first(BdrvNextIterator *it);
-BlockDriverState *bdrv_next(BdrvNextIterator *it);
+BlockDriverState * GRAPH_RDLOCK bdrv_first(BdrvNextIterator *it);
+BlockDriverState * GRAPH_RDLOCK bdrv_next(BdrvNextIterator *it);
void bdrv_next_cleanup(BdrvNextIterator *it);
BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs);
void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
void *opaque, bool read_only);
-char *bdrv_get_full_backing_filename(BlockDriverState *bs, Error **errp);
-char *bdrv_dirname(BlockDriverState *bs, Error **errp);
+
+char * GRAPH_RDLOCK
+bdrv_get_full_backing_filename(BlockDriverState *bs, Error **errp);
+
+char * GRAPH_RDLOCK bdrv_dirname(BlockDriverState *bs, Error **errp);
void bdrv_img_create(const char *filename, const char *fmt,
const char *base_filename, const char *base_fmt,
BdrvChildRole child_role,
Error **errp);
-bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp);
+bool GRAPH_RDLOCK
+bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp);
+
void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason);
void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason);
void bdrv_op_block_all(BlockDriverState *bs, Error *reason);
BdrvRequestFlags flags);
bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs);
-int bdrv_block_status(BlockDriverState *bs, int64_t offset,
- int64_t bytes, int64_t *pnum, int64_t *map,
- BlockDriverState **file);
+
+int coroutine_fn GRAPH_RDLOCK
+bdrv_co_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ int64_t *pnum, int64_t *map, BlockDriverState **file);
+int co_wrapper_mixed_bdrv_rdlock
+bdrv_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes,
+ int64_t *pnum, int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_block_status_above(BlockDriverState *bs, BlockDriverState *base,
int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file);
-int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base,
- int64_t offset, int64_t bytes, int64_t *pnum,
- int64_t *map, BlockDriverState **file);
+int co_wrapper_mixed_bdrv_rdlock
+bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base,
+ int64_t offset, int64_t bytes, int64_t *pnum,
+ int64_t *map, BlockDriverState **file);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_is_allocated(BlockDriverState *bs, int64_t offset, int64_t bytes,
int64_t *pnum);
-int bdrv_is_allocated(BlockDriverState *bs, int64_t offset, int64_t bytes,
- int64_t *pnum);
+int co_wrapper_mixed_bdrv_rdlock
+bdrv_is_allocated(BlockDriverState *bs, int64_t offset,
+ int64_t bytes, int64_t *pnum);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
bool include_base, int64_t offset, int64_t bytes,
int64_t *pnum);
-int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
- bool include_base, int64_t offset, int64_t bytes,
- int64_t *pnum);
+int co_wrapper_mixed_bdrv_rdlock
+bdrv_is_allocated_above(BlockDriverState *bs, BlockDriverState *base,
+ bool include_base, int64_t offset,
+ int64_t bytes, int64_t *pnum);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_is_zero_fast(BlockDriverState *bs, int64_t offset, int64_t bytes);
-int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg,
- Error **errp);
+int GRAPH_RDLOCK
+bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg,
+ Error **errp);
+
bool bdrv_is_read_only(BlockDriverState *bs);
bool bdrv_is_writable(BlockDriverState *bs);
bool bdrv_is_sg(BlockDriverState *bs);
bool bdrv_supports_compressed_writes(BlockDriverState *bs);
const char *bdrv_get_node_name(const BlockDriverState *bs);
-const char *bdrv_get_device_name(const BlockDriverState *bs);
-const char *bdrv_get_device_or_node_name(const BlockDriverState *bs);
+
+const char * GRAPH_RDLOCK
+bdrv_get_device_name(const BlockDriverState *bs);
+
+const char * GRAPH_RDLOCK
+bdrv_get_device_or_node_name(const BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
int co_wrapper_mixed_bdrv_rdlock
bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
-ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs,
- Error **errp);
+ImageInfoSpecific * GRAPH_RDLOCK
+bdrv_get_specific_info(BlockDriverState *bs, Error **errp);
+
BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs);
void bdrv_round_to_subclusters(BlockDriverState *bs,
int64_t offset, int64_t bytes,
*
* Begin a quiesced section for the parent of @c.
*/
-void bdrv_parent_drained_begin_single(BdrvChild *c);
+void GRAPH_RDLOCK bdrv_parent_drained_begin_single(BdrvChild *c);
/**
* bdrv_parent_drained_poll_single:
* Returns true if there is any pending activity to cease before @c can be
* called quiesced, false otherwise.
*/
-bool bdrv_parent_drained_poll_single(BdrvChild *c);
+bool GRAPH_RDLOCK bdrv_parent_drained_poll_single(BdrvChild *c);
/**
* bdrv_parent_drained_end_single:
*
* End a quiesced section for the parent of @c.
*/
-void bdrv_parent_drained_end_single(BdrvChild *c);
+void GRAPH_RDLOCK bdrv_parent_drained_end_single(BdrvChild *c);
/**
* bdrv_drain_poll:
*
* This is part of bdrv_drained_begin.
*/
-bool bdrv_drain_poll(BlockDriverState *bs, BdrvChild *ignore_parent,
- bool ignore_bds_parents);
+bool GRAPH_RDLOCK
+bdrv_drain_poll(BlockDriverState *bs, BdrvChild *ignore_parent,
+ bool ignore_bds_parents);
/**
* bdrv_drained_begin:
* Begin a quiesced section for exclusive access to the BDS, by disabling
* external request sources including NBD server, block jobs, and device model.
*
+ * This function can only be invoked by the main loop or a coroutine
+ * (regardless of the AioContext where it is running).
+ * If the coroutine is running in an Iothread AioContext, this function will
+ * just schedule a BH to run in the main loop.
+ * However, it cannot be directly called by an Iothread.
+ *
* This function can be recursive.
*/
void bdrv_drained_begin(BlockDriverState *bs);
* bdrv_drained_end:
*
* End a quiescent section started by bdrv_drained_begin().
+ *
+ * This function can only be invoked by the main loop or a coroutine
+ * (regardless of the AioContext where it is running).
+ * If the coroutine is running in an Iothread AioContext, this function will
+ * just schedule a BH to run in the main loop.
+ * However, it cannot be directly called by an Iothread.
*/
void bdrv_drained_end(BlockDriverState *bs);
Error **errp);
/* For handling image reopen for split or non-split files. */
- int (*bdrv_reopen_prepare)(BDRVReopenState *reopen_state,
- BlockReopenQueue *queue, Error **errp);
- void (*bdrv_reopen_commit)(BDRVReopenState *reopen_state);
- void (*bdrv_reopen_commit_post)(BDRVReopenState *reopen_state);
- void (*bdrv_reopen_abort)(BDRVReopenState *reopen_state);
+ int GRAPH_UNLOCKED_PTR (*bdrv_reopen_prepare)(
+ BDRVReopenState *reopen_state, BlockReopenQueue *queue, Error **errp);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_commit)(
+ BDRVReopenState *reopen_state);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_commit_post)(
+ BDRVReopenState *reopen_state);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_abort)(
+ BDRVReopenState *reopen_state);
void (*bdrv_join_options)(QDict *options, QDict *old_options);
int GRAPH_UNLOCKED_PTR (*bdrv_open)(
int coroutine_fn GRAPH_UNLOCKED_PTR (*bdrv_co_create_opts)(
BlockDriver *drv, const char *filename, QemuOpts *opts, Error **errp);
- int (*bdrv_amend_options)(BlockDriverState *bs,
- QemuOpts *opts,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque,
- bool force,
- Error **errp);
+ int GRAPH_RDLOCK_PTR (*bdrv_amend_options)(
+ BlockDriverState *bs, QemuOpts *opts,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ bool force, Error **errp);
- int (*bdrv_make_empty)(BlockDriverState *bs);
+ int GRAPH_RDLOCK_PTR (*bdrv_make_empty)(BlockDriverState *bs);
/*
* Refreshes the bs->exact_filename field. If that is impossible,
* bs->exact_filename has to be left empty.
*/
- void (*bdrv_refresh_filename)(BlockDriverState *bs);
+ void GRAPH_RDLOCK_PTR (*bdrv_refresh_filename)(BlockDriverState *bs);
/*
* Gathers the open options for all children into @target.
* block driver which implements it is probably doing something
* shady regarding its runtime option structure.
*/
- void (*bdrv_gather_child_options)(BlockDriverState *bs, QDict *target,
- bool backing_overridden);
+ void GRAPH_RDLOCK_PTR (*bdrv_gather_child_options)(
+ BlockDriverState *bs, QDict *target, bool backing_overridden);
/*
* Returns an allocated string which is the directory name of this BDS: It
* will be used to make relative filenames absolute by prepending this
* function's return value to them.
*/
- char *(*bdrv_dirname)(BlockDriverState *bs, Error **errp);
+ char * GRAPH_RDLOCK_PTR (*bdrv_dirname)(BlockDriverState *bs, Error **errp);
/*
* This informs the driver that we are no longer interested in the result
int GRAPH_RDLOCK_PTR (*bdrv_inactivate)(BlockDriverState *bs);
- int (*bdrv_snapshot_create)(BlockDriverState *bs,
- QEMUSnapshotInfo *sn_info);
- int (*bdrv_snapshot_goto)(BlockDriverState *bs,
- const char *snapshot_id);
- int (*bdrv_snapshot_delete)(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp);
+ int GRAPH_RDLOCK_PTR (*bdrv_snapshot_create)(
+ BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
+
+ int GRAPH_UNLOCKED_PTR (*bdrv_snapshot_goto)(
+ BlockDriverState *bs, const char *snapshot_id);
+
+ int GRAPH_RDLOCK_PTR (*bdrv_snapshot_delete)(
+ BlockDriverState *bs, const char *snapshot_id, const char *name,
+ Error **errp);
+
int (*bdrv_snapshot_list)(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_get_info)(
BlockDriverState *bs, BlockDriverInfo *bdi);
- ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs,
- Error **errp);
+ ImageInfoSpecific * GRAPH_RDLOCK_PTR (*bdrv_get_specific_info)(
+ BlockDriverState *bs, Error **errp);
BlockStatsSpecific *(*bdrv_get_specific_stats)(BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_save_vmstate)(
* Note that this can be nested. If drained_begin() was called twice, new
* I/O is allowed only after drained_end() was called twice, too.
*/
- void (*drained_begin)(BdrvChild *child);
- void (*drained_end)(BdrvChild *child);
+ void GRAPH_RDLOCK_PTR (*drained_begin)(BdrvChild *child);
+ void GRAPH_RDLOCK_PTR (*drained_end)(BdrvChild *child);
/*
* Returns whether the parent has pending requests for the child. This
* callback is polled after .drained_begin() has been called until all
* activity on the child has stopped.
*/
- bool (*drained_poll)(BdrvChild *child);
+ bool GRAPH_RDLOCK_PTR (*drained_poll)(BdrvChild *child);
/*
* Notifies the parent that the filename of its child has changed (e.g.
*/
bool quiesced_parent;
- QLIST_ENTRY(BdrvChild) next;
- QLIST_ENTRY(BdrvChild) next_parent;
+ QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next;
+ QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next_parent;
};
/*
* See also comment in include/block/block.h, to learn how backing and file
* are connected with BdrvChildRole.
*/
- QLIST_HEAD(, BdrvChild) children;
+ QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) children;
BdrvChild *backing;
BdrvChild *file;
- QLIST_HEAD(, BdrvChild) parents;
+ QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) parents;
QDict *options;
QDict *explicit_options;
*/
void bdrv_wakeup(BlockDriverState *bs);
-const char *bdrv_get_parent_name(const BlockDriverState *bs);
+const char * GRAPH_RDLOCK bdrv_get_parent_name(const BlockDriverState *bs);
bool blk_dev_has_tray(BlockBackend *blk);
bool blk_dev_is_tray_open(BlockBackend *blk);
BdrvChild *bdrv_cow_child(BlockDriverState *bs);
BdrvChild *bdrv_filter_child(BlockDriverState *bs);
BdrvChild *bdrv_filter_or_cow_child(BlockDriverState *bs);
-BdrvChild *bdrv_primary_child(BlockDriverState *bs);
+BdrvChild * GRAPH_RDLOCK bdrv_primary_child(BlockDriverState *bs);
BlockDriverState *bdrv_skip_filters(BlockDriverState *bs);
BlockDriverState *bdrv_backing_chain_next(BlockDriverState *bs);
return child_bs(bdrv_filter_or_cow_child(bs));
}
-static inline BlockDriverState *bdrv_primary_bs(BlockDriverState *bs)
+static inline BlockDriverState * GRAPH_RDLOCK
+bdrv_primary_bs(BlockDriverState *bs)
{
IO_CODE();
return child_bs(bdrv_primary_child(bs));
* This function polls. Callers must not hold the lock of any AioContext other
* than the current one and the one of @bs.
*/
-void bdrv_graph_wrlock(BlockDriverState *bs) TSA_ACQUIRE(graph_lock) TSA_NO_TSA;
+void no_coroutine_fn TSA_ACQUIRE(graph_lock) TSA_NO_TSA
+bdrv_graph_wrlock(BlockDriverState *bs);
/*
* bdrv_graph_wrunlock:
#include "block/snapshot.h"
#include "qapi/qapi-types-block-core.h"
-BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
- BlockDriverState *bs,
- bool flat,
- Error **errp);
-int bdrv_query_snapshot_info_list(BlockDriverState *bs,
- SnapshotInfoList **p_list,
- Error **errp);
-void bdrv_query_image_info(BlockDriverState *bs,
- ImageInfo **p_info,
- bool flat,
- bool skip_implicit_filters,
- Error **errp);
+BlockDeviceInfo * GRAPH_RDLOCK
+bdrv_block_device_info(BlockBackend *blk, BlockDriverState *bs,
+ bool flat, Error **errp);
+
+int GRAPH_RDLOCK
+bdrv_query_snapshot_info_list(BlockDriverState *bs,
+ SnapshotInfoList **p_list,
+ Error **errp);
+void GRAPH_RDLOCK
+bdrv_query_image_info(BlockDriverState *bs, ImageInfo **p_info, bool flat,
+ bool skip_implicit_filters, Error **errp);
void GRAPH_RDLOCK
bdrv_query_block_graph_info(BlockDriverState *bs, BlockGraphInfo **p_info,
Error **errp);
#ifndef SNAPSHOT_H
#define SNAPSHOT_H
+#include "block/graph-lock.h"
#include "qapi/qapi-builtin-types.h"
#define SNAPSHOT_OPT_BASE "snapshot."
const char *name,
QEMUSnapshotInfo *sn_info,
Error **errp);
-int bdrv_can_snapshot(BlockDriverState *bs);
-int bdrv_snapshot_create(BlockDriverState *bs,
- QEMUSnapshotInfo *sn_info);
-int bdrv_snapshot_goto(BlockDriverState *bs,
- const char *snapshot_id,
- Error **errp);
-int bdrv_snapshot_delete(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp);
+
+int GRAPH_RDLOCK bdrv_can_snapshot(BlockDriverState *bs);
+
+int GRAPH_RDLOCK
+bdrv_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
+
+int GRAPH_UNLOCKED
+bdrv_snapshot_goto(BlockDriverState *bs, const char *snapshot_id, Error **errp);
+
+int GRAPH_RDLOCK
+bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id,
+ const char *name, Error **errp);
+
int bdrv_snapshot_list(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int bdrv_snapshot_load_tmp(BlockDriverState *bs,
void blk_remove_bs(BlockBackend *blk);
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp);
int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp);
-bool bdrv_has_blk(BlockDriverState *bs);
-bool bdrv_is_root_node(BlockDriverState *bs);
+bool GRAPH_RDLOCK bdrv_has_blk(BlockDriverState *bs);
+bool GRAPH_RDLOCK bdrv_is_root_node(BlockDriverState *bs);
int GRAPH_UNLOCKED blk_set_perm(BlockBackend *blk, uint64_t perm,
uint64_t shared_perm, Error **errp);
void blk_get_perm(BlockBackend *blk, uint64_t *perm, uint64_t *shared_perm);
Error *local_err = NULL;
int ret;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
block_mig_state.submitted = 0;
block_mig_state.read_done = 0;
block_mig_state.transferred = 0;
BlockDriverState *bs;
BdrvNextIterator it;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
len = strlen(str);
readline_set_completion_index(rs, len);
has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID);
if (file && has_offset) {
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(file);
+ bdrv_graph_rdunlock_main_loop();
filename = file->filename;
}
sn.date_sec = rt / G_USEC_PER_SEC;
sn.date_nsec = (rt % G_USEC_PER_SEC) * 1000;
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_snapshot_create(bs, &sn);
+ bdrv_graph_rdunlock_main_loop();
+
if (ret) {
error_report("Could not create snapshot '%s': %s",
snapshot_name, strerror(-ret));
break;
case SNAPSHOT_DELETE:
+ bdrv_graph_rdlock_main_loop();
ret = bdrv_snapshot_find(bs, &sn, snapshot_name);
if (ret < 0) {
error_report("Could not delete snapshot '%s': snapshot not "
ret = 1;
}
}
+ bdrv_graph_rdunlock_main_loop();
break;
}
qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
}
+ bdrv_graph_rdlock_main_loop();
bdrv_refresh_filename(bs);
+ bdrv_graph_rdunlock_main_loop();
overlay_filename = bs->exact_filename[0] ? bs->exact_filename
: bs->filename;
out_real_path =
{
BlockDriver *drv;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
/* Find driver and parse its options */
drv = bdrv_find_format(format);
if (!drv) {
goto out;
}
+ bdrv_graph_rdlock_main_loop();
if (!bs->drv->bdrv_amend_options) {
error_report("Format driver '%s' does not support option amendment",
fmt);
+ bdrv_graph_rdunlock_main_loop();
ret = -1;
goto out;
}
"This option is only supported for image creation\n");
}
+ bdrv_graph_rdunlock_main_loop();
error_report_err(err);
ret = -1;
goto out;
qemu_progress_print(0.f, 0);
ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL, force, &err);
qemu_progress_print(100.f, 0);
+ bdrv_graph_rdunlock_main_loop();
+
if (ret < 0) {
error_report_err(err);
goto out;
char s1[64], s2[64];
int ret;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (bs->drv && bs->drv->format_name) {
printf("format name: %s\n", bs->drv->format_name);
}
raise ValueError(f"Invalid no_co function name: {self.name}")
if not self.create_only_co:
raise ValueError(f"no_co function can't be mixed: {self.name}")
- if self.graph_rdlock:
- raise ValueError(f"no_co function can't be rdlock: {self.name}")
+ if self.graph_rdlock and self.graph_wrlock:
+ raise ValueError("function can't be both rdlock and wrlock: "
+ f"{self.name}")
self.target_name = f'{subsystem}_{subname}'
self.ctx = self.gen_ctx()
graph_lock=''
graph_unlock=''
- if func.graph_wrlock:
+ if func.graph_rdlock:
+ graph_lock=' bdrv_graph_rdlock_main_loop();'
+ graph_unlock=' bdrv_graph_rdunlock_main_loop();'
+ elif func.graph_wrlock:
graph_lock=' bdrv_graph_wrlock(NULL);'
graph_unlock=' bdrv_graph_wrunlock();'
blk_co_unref(blk);
} else {
BdrvChild *c, *next_c;
+ bdrv_graph_co_rdlock();
QLIST_FOREACH_SAFE(c, &bs->children, next, next_c) {
+ bdrv_graph_co_rdunlock();
bdrv_co_unref_child(bs, c);
+ bdrv_graph_co_rdlock();
}
+ bdrv_graph_co_rdunlock();
}
dbdd->done = true;
};
static struct detach_by_parent_data detach_by_parent_data;
-static void detach_indirect_bh(void *opaque)
+static void no_coroutine_fn detach_indirect_bh(void *opaque)
{
struct detach_by_parent_data *data = opaque;
bdrv_graph_wrunlock();
}
-static void detach_by_parent_aio_cb(void *opaque, int ret)
+static void coroutine_mixed_fn detach_by_parent_aio_cb(void *opaque, int ret)
{
struct detach_by_parent_data *data = &detach_by_parent_data;
g_assert_cmpint(ret, ==, 0);
if (data->by_parent_cb) {
bdrv_inc_in_flight(data->child_b->bs);
- detach_indirect_bh(data);
+ aio_bh_schedule_oneshot(qemu_get_current_aio_context(),
+ detach_indirect_bh, &detach_by_parent_data);
}
}
-static void detach_by_driver_cb_drained_begin(BdrvChild *child)
+static void GRAPH_RDLOCK detach_by_driver_cb_drained_begin(BdrvChild *child)
{
struct detach_by_parent_data *data = &detach_by_parent_data;
* state is messed up, but if it is only polled in the single
* BDRV_POLL_WHILE() at the end of the drain, this should work fine.
*/
-static void test_detach_indirect(bool by_parent_cb)
+static void TSA_NO_TSA test_detach_indirect(bool by_parent_cb)
{
BlockBackend *blk;
BlockDriverState *parent_a, *parent_b, *a, *b, *c;
static void test_sync_op_activate(BdrvChild *c)
{
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
/* Early success: Image is not inactive */
bdrv_activate(c->bs, NULL);
}
BlockDriverState *bs;
BdrvChild *c;
+ GLOBAL_STATE_CODE();
+
blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
blk_insert_bs(blk, bs, &error_abort);
+
+ bdrv_graph_rdlock_main_loop();
c = QLIST_FIRST(&bs->parents);
+ bdrv_graph_rdunlock_main_loop();
blk_set_aio_context(blk, ctx, &error_abort);
aio_context_acquire(ctx);
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