@@ -1003,10 +1003,9 @@ 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);
+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 qcow2_co_remove_persistent_dirty_bitmap(BlockDriverState *bs,
const char *name,
Error **errp);
@@ -176,8 +176,12 @@ const char *bdrv_get_format_name(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);
@@ -99,7 +99,7 @@ BlockDriver *bdrv_probe_all(const uint8_t *buf, int buf_size,
*/
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);
@@ -33,9 +33,10 @@ BlockDeviceInfo * GRAPH_RDLOCK
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);
+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);
@@ -279,8 +279,9 @@ bool bdrv_is_read_only(BlockDriverState *bs)
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();
@@ -319,6 +320,8 @@ int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg,
int ret = 0;
IO_CODE();
+ assume_graph_lock(); /* FIXME */
+
if (!(bs->open_flags & BDRV_O_RDWR)) {
return 0;
}
@@ -4949,7 +4952,10 @@ bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
* 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;
@@ -4983,9 +4989,11 @@ bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
} 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;
}
@@ -7241,6 +7249,8 @@ bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp)
{
BdrvOpBlocker *blocker;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
@@ -374,6 +374,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
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);
@@ -1170,9 +1170,12 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
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");
@@ -301,9 +301,12 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
}
/* 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);
@@ -166,6 +166,8 @@ static int check_constraints_on_bitmap(BlockDriverState *bs,
int64_t len = bdrv_getlength(bs);
int64_t bitmap_bytes;
+ assume_graph_lock(); /* FIXME */
+
assert(granularity > 0);
assert((granularity & (granularity - 1)) == 0);
@@ -2737,6 +2737,8 @@ static int qcow2_inactivate(BlockDriverState *bs)
int ret, result = 0;
Error *local_err = NULL;
+ assume_graph_lock(); /* FIXME */
+
qcow2_store_persistent_dirty_bitmaps(bs, true, &local_err);
if (local_err != NULL) {
result = -EINVAL;
@@ -5944,6 +5946,8 @@ void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
char *message;
va_list ap;
+ assume_graph_lock(); /* FIXME */
+
fatal = fatal && bdrv_is_writable(bs);
if (s->signaled_corruption &&
@@ -206,7 +206,7 @@ static void quorum_report_bad(QuorumOpType type, uint64_t offset,
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;
@@ -219,7 +219,7 @@ static void quorum_report_failure(QuorumAIOCB *acb)
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;
@@ -1208,6 +1208,8 @@ static int qemu_rbd_reopen_prepare(BDRVReopenState *state,
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",
@@ -432,6 +432,7 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
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));
@@ -641,8 +642,10 @@ int bdrv_all_goto_snapshot(const char *name,
}
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;
}
@@ -492,9 +492,12 @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags,
}
/* 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);
@@ -446,9 +446,12 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
}
/* 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);
@@ -1145,6 +1145,8 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags,
QemuOpts *opts;
int ret;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
#ifdef DEBUG
vvv = s;
#endif
@@ -485,6 +485,7 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
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);
This adds GRAPH_RDLOCK annotations to declare that callers of bdrv_get_parent_name() need to hold a reader lock for the graph because it accesses the parents list of a node. For some places, we know that they will hold the lock, but we don't have the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock() with a FIXME comment. These places will be removed once everything is properly annotated. Signed-off-by: Kevin Wolf <kwolf@redhat.com> --- block/qcow2.h | 7 +++---- include/block/block-io.h | 8 ++++++-- include/block/block_int-io.h | 2 +- include/block/qapi.h | 7 ++++--- block.c | 14 ++++++++++++-- block/backup.c | 1 + block/parallels.c | 3 +++ block/qcow.c | 3 +++ block/qcow2-bitmap.c | 2 ++ block/qcow2.c | 4 ++++ block/quorum.c | 4 ++-- block/rbd.c | 2 ++ block/snapshot.c | 3 +++ block/vdi.c | 3 +++ block/vpc.c | 3 +++ block/vvfat.c | 2 ++ blockjob.c | 1 + 17 files changed, 55 insertions(+), 14 deletions(-)