5:23 p.m.
These mean the same thing now. Unify them and rename the merged call
bdrv_dirty_bitmap_busy to indicate semantically what we are describing,
as well as help disambiguate from the various _locked and _unlocked
versions of bitmap helpers that refer to mutex locks.
Signed-off-by: John Snow <jsnow(a)redhat.com>
Reviewed-by: Eric Blake <eblake(a)redhat.com>
---
block/dirty-bitmap.c | 41 +++++++++++++++-------------------
blockdev.c | 18 +++++++--------
include/block/dirty-bitmap.h | 5 ++---
migration/block-dirty-bitmap.c | 6 ++---
nbd/server.c | 6 ++---
5 files changed, 35 insertions(+), 41 deletions(-)
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 2042c62602..8ab048385a 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -48,9 +48,9 @@ struct BdrvDirtyBitmap {
QemuMutex *mutex;
HBitmap *bitmap; /* Dirty bitmap implementation */
HBitmap *meta; /* Meta dirty bitmap */
- bool qmp_locked; /* Bitmap is locked, it can't be modified
- through QMP */
- BdrvDirtyBitmap *successor; /* Anonymous child; implies user_locked state */
+ bool busy; /* Bitmap is busy, it can't be modified through
+ QMP */
+ BdrvDirtyBitmap *successor; /* Anonymous child, if any. */
char *name; /* Optional non-empty unique ID */
int64_t size; /* Size of the bitmap, in bytes */
bool disabled; /* Bitmap is disabled. It ignores all writes to
@@ -188,22 +188,17 @@ bool bdrv_dirty_bitmap_has_successor(BdrvDirtyBitmap *bitmap)
return bitmap->successor;
}
-bool bdrv_dirty_bitmap_user_locked(BdrvDirtyBitmap *bitmap) {
- return bdrv_dirty_bitmap_qmp_locked(bitmap);
+bool bdrv_dirty_bitmap_busy(BdrvDirtyBitmap *bitmap) {
+ return bitmap->busy;
}
-void bdrv_dirty_bitmap_set_qmp_locked(BdrvDirtyBitmap *bitmap, bool qmp_locked)
+void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy)
{
qemu_mutex_lock(bitmap->mutex);
- bitmap->qmp_locked = qmp_locked;
+ bitmap->busy = busy;
qemu_mutex_unlock(bitmap->mutex);
}
-bool bdrv_dirty_bitmap_qmp_locked(BdrvDirtyBitmap *bitmap)
-{
- return bitmap->qmp_locked;
-}
-
/* Called with BQL taken. */
bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
{
@@ -215,7 +210,7 @@ DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
{
if (bdrv_dirty_bitmap_has_successor(bitmap)) {
return DIRTY_BITMAP_STATUS_FROZEN;
- } else if (bdrv_dirty_bitmap_qmp_locked(bitmap)) {
+ } else if (bdrv_dirty_bitmap_busy(bitmap)) {
return DIRTY_BITMAP_STATUS_LOCKED;
} else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
return DIRTY_BITMAP_STATUS_DISABLED;
@@ -242,7 +237,7 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
uint64_t granularity;
BdrvDirtyBitmap *child;
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_setg(errp, "Cannot create a successor for a bitmap that is in-use
"
"by an operation");
return -1;
@@ -266,7 +261,7 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
/* Install the successor and lock the parent */
bitmap->successor = child;
- bitmap->qmp_locked = true;
+ bitmap->busy = true;
return 0;
}
@@ -288,7 +283,7 @@ void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap)
static void bdrv_release_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap)
{
assert(!bitmap->active_iterators);
- assert(!bdrv_dirty_bitmap_user_locked(bitmap));
+ assert(!bdrv_dirty_bitmap_busy(bitmap));
assert(!bitmap->meta);
QLIST_REMOVE(bitmap, list);
hbitmap_free(bitmap->bitmap);
@@ -320,7 +315,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
bitmap->successor = NULL;
successor->persistent = bitmap->persistent;
bitmap->persistent = false;
- bitmap->qmp_locked = false;
+ bitmap->busy = false;
bdrv_release_dirty_bitmap(bs, bitmap);
return successor;
@@ -329,7 +324,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
/**
* In cases of failure where we can no longer safely delete the parent,
* we may wish to re-join the parent and child/successor.
- * The merged parent will not be user_locked, nor explicitly re-enabled.
+ * The merged parent will not be busy, nor explicitly re-enabled.
* Called within bdrv_dirty_bitmap_lock..unlock and with BQL taken.
*/
BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs,
@@ -349,7 +344,7 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState
*bs,
}
parent->disabled = successor->disabled;
- parent->qmp_locked = false;
+ parent->busy = false;
bdrv_release_dirty_bitmap_locked(successor);
parent->successor = NULL;
@@ -380,7 +375,7 @@ void bdrv_dirty_bitmap_truncate(BlockDriverState *bs, int64_t bytes)
bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
- assert(!bdrv_dirty_bitmap_user_locked(bitmap));
+ assert(!bdrv_dirty_bitmap_busy(bitmap));
assert(!bitmap->active_iterators);
hbitmap_truncate(bitmap->bitmap, bytes);
bitmap->size = bytes;
@@ -398,7 +393,7 @@ void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap
*bitmap)
/**
* Release all named dirty bitmaps attached to a BDS (for use in bdrv_close()).
- * There must not be any user_locked bitmaps attached.
+ * There must not be any busy bitmaps attached.
* This function does not remove persistent bitmaps from the storage.
* Called with BQL taken.
*/
@@ -462,7 +457,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
info->name = g_strdup(bm->name);
info->status = bdrv_dirty_bitmap_status(bm);
info->recording = bdrv_dirty_bitmap_recording(bm);
- info->busy = bdrv_dirty_bitmap_user_locked(bm);
+ info->busy = bdrv_dirty_bitmap_busy(bm);
info->persistent = bm->persistent;
entry->value = info;
*plist = entry;
@@ -770,7 +765,7 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const
BdrvDirtyBitmap *src,
qemu_mutex_lock(dest->mutex);
- if (bdrv_dirty_bitmap_user_locked(dest)) {
+ if (bdrv_dirty_bitmap_busy(dest)) {
error_setg(errp, "Bitmap '%s' is currently in use by another"
" operation and cannot be modified", dest->name);
goto out;
diff --git a/blockdev.c b/blockdev.c
index fb18e9c975..23a4bf136e 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2008,7 +2008,7 @@ static void block_dirty_bitmap_clear_prepare(BlkActionState
*common,
return;
}
- if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
+ if (bdrv_dirty_bitmap_busy(state->bitmap)) {
error_setg(errp, "Cannot modify a bitmap in use by another
operation");
return;
} else if (bdrv_dirty_bitmap_readonly(state->bitmap)) {
@@ -2057,7 +2057,7 @@ static void block_dirty_bitmap_enable_prepare(BlkActionState
*common,
return;
}
- if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
+ if (bdrv_dirty_bitmap_busy(state->bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be enabled", action->name);
@@ -2098,7 +2098,7 @@ static void block_dirty_bitmap_disable_prepare(BlkActionState
*common,
return;
}
- if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
+ if (bdrv_dirty_bitmap_busy(state->bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be disabled", action->name);
@@ -2884,7 +2884,7 @@ void qmp_block_dirty_bitmap_remove(const char *node, const char
*name,
return;
}
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another operation
and"
" cannot be removed", name);
@@ -2917,7 +2917,7 @@ void qmp_block_dirty_bitmap_clear(const char *node, const char
*name,
return;
}
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be cleared", name);
@@ -2941,7 +2941,7 @@ void qmp_block_dirty_bitmap_enable(const char *node, const char
*name,
return;
}
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be enabled", name);
@@ -2962,7 +2962,7 @@ void qmp_block_dirty_bitmap_disable(const char *node, const char
*name,
return;
}
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be disabled", name);
@@ -3538,7 +3538,7 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
bdrv_unref(target_bs);
goto out;
}
- if (bdrv_dirty_bitmap_user_locked(bmap)) {
+ if (bdrv_dirty_bitmap_busy(bmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be used for backup", backup->bitmap);
@@ -3651,7 +3651,7 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
error_setg(errp, "Bitmap '%s' could not be found",
backup->bitmap);
goto out;
}
- if (bdrv_dirty_bitmap_user_locked(bmap)) {
+ if (bdrv_dirty_bitmap_busy(bmap)) {
error_setg(errp,
"Bitmap '%s' is currently in use by another
operation"
" and cannot be used for backup", backup->bitmap);
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h
index cdbb4dfefd..ba8477b73f 100644
--- a/include/block/dirty-bitmap.h
+++ b/include/block/dirty-bitmap.h
@@ -68,7 +68,7 @@ void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap);
void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value);
void bdrv_dirty_bitmap_set_persistance(BdrvDirtyBitmap *bitmap,
bool persistent);
-void bdrv_dirty_bitmap_set_qmp_locked(BdrvDirtyBitmap *bitmap, bool qmp_locked);
+void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy);
void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src,
HBitmap **backup, Error **errp);
void bdrv_dirty_bitmap_set_migration(BdrvDirtyBitmap *bitmap, bool migration);
@@ -91,8 +91,7 @@ bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap);
bool bdrv_has_readonly_bitmaps(BlockDriverState *bs);
bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap);
bool bdrv_dirty_bitmap_get_persistance(BdrvDirtyBitmap *bitmap);
-bool bdrv_dirty_bitmap_qmp_locked(BdrvDirtyBitmap *bitmap);
-bool bdrv_dirty_bitmap_user_locked(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_busy(BdrvDirtyBitmap *bitmap);
bool bdrv_has_changed_persistent_bitmaps(BlockDriverState *bs);
BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap);
diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c
index ac6954142f..7057fff242 100644
--- a/migration/block-dirty-bitmap.c
+++ b/migration/block-dirty-bitmap.c
@@ -261,7 +261,7 @@ static void dirty_bitmap_mig_cleanup(void)
while ((dbms = QSIMPLEQ_FIRST(&dirty_bitmap_mig_state.dbms_list)) != NULL) {
QSIMPLEQ_REMOVE_HEAD(&dirty_bitmap_mig_state.dbms_list, entry);
- bdrv_dirty_bitmap_set_qmp_locked(dbms->bitmap, false);
+ bdrv_dirty_bitmap_set_busy(dbms->bitmap, false);
bdrv_unref(dbms->bs);
g_free(dbms);
}
@@ -301,7 +301,7 @@ static int init_dirty_bitmap_migration(void)
goto fail;
}
- if (bdrv_dirty_bitmap_user_locked(bitmap)) {
+ if (bdrv_dirty_bitmap_busy(bitmap)) {
error_report("Can't migrate a bitmap that is in use by another
operation: '%s'",
bdrv_dirty_bitmap_name(bitmap));
goto fail;
@@ -314,7 +314,7 @@ static int init_dirty_bitmap_migration(void)
}
bdrv_ref(bs);
- bdrv_dirty_bitmap_set_qmp_locked(bitmap, true);
+ bdrv_dirty_bitmap_set_busy(bitmap, true);
dbms = g_new0(DirtyBitmapMigBitmapState, 1);
dbms->bs = bs;
diff --git a/nbd/server.c b/nbd/server.c
index 0910d09a6d..5021239f7d 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1518,12 +1518,12 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t
dev_offset,
goto fail;
}
- if (bdrv_dirty_bitmap_user_locked(bm)) {
+ if (bdrv_dirty_bitmap_busy(bm)) {
error_setg(errp, "Bitmap '%s' is in use", bitmap);
goto fail;
}
- bdrv_dirty_bitmap_set_qmp_locked(bm, true);
+ bdrv_dirty_bitmap_set_busy(bm, true);
exp->export_bitmap = bm;
exp->export_bitmap_context =
g_strdup_printf("qemu:dirty-bitmap:%s",
bitmap);
@@ -1641,7 +1641,7 @@ void nbd_export_put(NBDExport *exp)
}
if (exp->export_bitmap) {
- bdrv_dirty_bitmap_set_qmp_locked(exp->export_bitmap, false);
+ bdrv_dirty_bitmap_set_busy(exp->export_bitmap, false);
g_free(exp->export_bitmap_context);
}
--
2.17.2