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block: fix spoiling all dirty bitmaps by mirror and migration

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Mirror and migration use dirty bitmaps for their purposes, and since
commit [block: per caller dirty bitmap] they use their own bitmaps, not
the global one. But they use old functions bdrv_set_dirty and
bdrv_reset_dirty, which change all dirty bitmaps.

Named dirty bitmaps series by Fam and Snow are affected: mirroring and
migration will spoil all (not related to this mirroring or migration)
named dirty bitmaps.

This patch fixes this by adding bdrv_set_dirty_bitmap and
bdrv_reset_dirty_bitmap, which change concrete bitmap. Also, to prevent
such mistakes in future, old functions bdrv_(set,reset)_dirty are made
static, for internal block usage.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@parallels.com>
CC: John Snow <jsnow@redhat.com>
CC: Fam Zheng <famz@redhat.com>
CC: Denis V. Lunev <den@openvz.org>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 1417081246-3593-1-git-send-email-vsementsov@parallels.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2014-11-27 12:40:46 +03:00 committed by Stefan Hajnoczi
parent a06e43556e
commit c4237dfa63
4 changed files with 34 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
block.c
View File

@ -97,6 +97,10 @@ static QTAILQ_HEAD(, BlockDriverState) graph_bdrv_states =
static QLIST_HEAD(, BlockDriver) bdrv_drivers =
QLIST_HEAD_INITIALIZER(bdrv_drivers);
static void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors);
static void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors);
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
@ -5411,8 +5415,20 @@ void bdrv_dirty_iter_init(BlockDriverState *bs,
hbitmap_iter_init(hbi, bitmap->bitmap, 0);
}
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors)
void bdrv_set_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t cur_sector, int nr_sectors)
{
hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
}
void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t cur_sector, int nr_sectors)
{
hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors);
}
static void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors)
{
BdrvDirtyBitmap *bitmap;
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
@ -5420,7 +5436,8 @@ void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
}
}
void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors)
static void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors)
{
BdrvDirtyBitmap *bitmap;
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {

11
block/mirror.c
View File

@ -128,7 +128,8 @@ static void mirror_write_complete(void *opaque, int ret)
BlockDriverState *source = s->common.bs;
BlockErrorAction action;
bdrv_set_dirty(source, op->sector_num, op->nb_sectors);
bdrv_set_dirty_bitmap(source, s->dirty_bitmap, op->sector_num,
op->nb_sectors);
action = mirror_error_action(s, false, -ret);
if (action == BLOCK_ERROR_ACTION_REPORT && s->ret >= 0) {
s->ret = ret;
@ -145,7 +146,8 @@ static void mirror_read_complete(void *opaque, int ret)
BlockDriverState *source = s->common.bs;
BlockErrorAction action;
bdrv_set_dirty(source, op->sector_num, op->nb_sectors);
bdrv_set_dirty_bitmap(source, s->dirty_bitmap, op->sector_num,
op->nb_sectors);
action = mirror_error_action(s, true, -ret);
if (action == BLOCK_ERROR_ACTION_REPORT && s->ret >= 0) {
s->ret = ret;
@ -286,7 +288,8 @@ static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
next_sector += sectors_per_chunk;
}
bdrv_reset_dirty(source, sector_num, nb_sectors);
bdrv_reset_dirty_bitmap(source, s->dirty_bitmap, sector_num,
nb_sectors);
/* Copy the dirty cluster. */
s->in_flight++;
@ -442,7 +445,7 @@ static void coroutine_fn mirror_run(void *opaque)
assert(n > 0);
if (ret == 1) {
bdrv_set_dirty(bs, sector_num, n);
bdrv_set_dirty_bitmap(bs, s->dirty_bitmap, sector_num, n);
sector_num = next;
} else {
sector_num += n;

6
include/block/block.h
View File

@ -438,8 +438,10 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, int granularity,
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector);
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
void bdrv_set_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t cur_sector, int nr_sectors);
void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
int64_t cur_sector, int nr_sectors);
void bdrv_dirty_iter_init(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi);
int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);

5
migration/block.c
View File

@ -303,7 +303,7 @@ static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds)
blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov,
nr_sectors, blk_mig_read_cb, blk);
bdrv_reset_dirty(bs, cur_sector, nr_sectors);
bdrv_reset_dirty_bitmap(bs, bmds->dirty_bitmap, cur_sector, nr_sectors);
qemu_mutex_unlock_iothread();
bmds->cur_sector = cur_sector + nr_sectors;
@ -496,7 +496,8 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds,
g_free(blk);
}
bdrv_reset_dirty(bmds->bs, sector, nr_sectors);
bdrv_reset_dirty_bitmap(bmds->bs, bmds->dirty_bitmap, sector,
nr_sectors);
break;
}
sector += BDRV_SECTORS_PER_DIRTY_CHUNK;