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dirty-bitmap: add locked state

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Add special state, when qmp operations on the bitmap are disabled.
It is needed during bitmap migration. "Frozen" state is not
appropriate here, because it looks like bitmap is unchanged.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20180207155837.92351-5-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy
2018-03-13 15:34:00 -04:00
committed by John Snow
parent 044ee8e143
commit 4f43e9535b
4 changed files with 42 additions and 1 deletions
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19
blockdev.c
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@ -2118,6 +2118,9 @@ static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
error_setg(errp, "Cannot modify a frozen bitmap");
return;
} else if (bdrv_dirty_bitmap_qmp_locked(state->bitmap)) {
error_setg(errp, "Cannot modify a locked bitmap");
return;
} else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
error_setg(errp, "Cannot clear a disabled bitmap");
return;
@ -2862,6 +2865,11 @@ void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
"Bitmap '%s' is currently frozen and cannot be removed",
name);
return;
} else if (bdrv_dirty_bitmap_qmp_locked(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently locked and cannot be removed",
name);
return;
}
if (bdrv_dirty_bitmap_get_persistance(bitmap)) {
@ -2896,6 +2904,11 @@ void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
"Bitmap '%s' is currently frozen and cannot be modified",
name);
return;
} else if (bdrv_dirty_bitmap_qmp_locked(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently locked and cannot be modified",
name);
return;
} else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently disabled and cannot be cleared",
@ -3370,6 +3383,12 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
bdrv_unref(target_bs);
goto out;
}
if (bdrv_dirty_bitmap_qmp_locked(bmap)) {
error_setg(errp,
"Bitmap '%s' is currently locked and cannot be used for "
"backup", backup->bitmap);
goto out;
}
}
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,