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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-06-05 14:39:05 +0200 |
|---|---|---|
| committer | Fam Zheng <famz@redhat.com> | 2017-06-16 07:55:00 +0800 |
| commit | b64bd51efa9bbf30df1b2f91477d2805678d0b93 (patch) | |
| tree | 99267190671c4f0e72db020993ae16f3797120d3 /migration/block.c | |
| parent | c0bad49946287ef218e871608b753b9991f6e54c (diff) | |
| download | focaccia-qemu-b64bd51efa9bbf30df1b2f91477d2805678d0b93.tar.gz focaccia-qemu-b64bd51efa9bbf30df1b2f91477d2805678d0b93.zip | |
block: protect modification of dirty bitmaps with a mutex
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20170605123908.18777-17-pbonzini@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'migration/block.c')
| -rw-r--r-- | migration/block.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/migration/block.c b/migration/block.c index 423877bb40..7674ae1078 100644 --- a/migration/block.c +++ b/migration/block.c @@ -525,14 +525,15 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, } else { blk_mig_unlock(); } - if (bdrv_get_dirty(bs, bmds->dirty_bitmap, sector)) { - + bdrv_dirty_bitmap_lock(bmds->dirty_bitmap); + if (bdrv_get_dirty_locked(bs, bmds->dirty_bitmap, sector)) { if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { nr_sectors = total_sectors - sector; } else { nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; } - bdrv_reset_dirty_bitmap(bmds->dirty_bitmap, sector, nr_sectors); + bdrv_reset_dirty_bitmap_locked(bmds->dirty_bitmap, sector, nr_sectors); + bdrv_dirty_bitmap_unlock(bmds->dirty_bitmap); blk = g_new(BlkMigBlock, 1); blk->buf = g_malloc(BLOCK_SIZE); @@ -568,9 +569,10 @@ static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, sector += nr_sectors; bmds->cur_dirty = sector; - break; } + + bdrv_dirty_bitmap_unlock(bmds->dirty_bitmap); sector += BDRV_SECTORS_PER_DIRTY_CHUNK; bmds->cur_dirty = sector; } |