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| author | Kevin Wolf <kwolf@redhat.com> | 2010-06-18 16:11:53 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-06-22 14:38:02 +0200 |
| commit | 5e5557d97026d1d3325e0e7b0ba593366da2f3dc (patch) | |
| tree | 76ba21faf806e1873155193eef4e491a63377f9c /block/qcow.c | |
| parent | b0ad5a455d7e5352d4c86ba945112011dbeadfb8 (diff) | |
| download | qemu-5e5557d97026d1d3325e0e7b0ba593366da2f3dc.zip | |
qcow: Use bdrv_(p)write_sync for metadata writes
Use bdrv_(p)write_sync to ensure metadata integrity in case of a crash.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow.c')
| -rw-r--r-- | block/qcow.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/block/qcow.c b/block/qcow.c index 449858fa47..816103d395 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -273,8 +273,9 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, /* update the L1 entry */ s->l1_table[l1_index] = l2_offset; tmp = cpu_to_be64(l2_offset); - if (bdrv_pwrite(bs->file, s->l1_table_offset + l1_index * sizeof(tmp), - &tmp, sizeof(tmp)) != sizeof(tmp)) + if (bdrv_pwrite_sync(bs->file, + s->l1_table_offset + l1_index * sizeof(tmp), + &tmp, sizeof(tmp)) < 0) return 0; new_l2_table = 1; } @@ -302,8 +303,8 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, l2_table = s->l2_cache + (min_index << s->l2_bits); if (new_l2_table) { memset(l2_table, 0, s->l2_size * sizeof(uint64_t)); - if (bdrv_pwrite(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) != - s->l2_size * sizeof(uint64_t)) + if (bdrv_pwrite_sync(bs->file, l2_offset, l2_table, + s->l2_size * sizeof(uint64_t)) < 0) return 0; } else { if (bdrv_pread(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) != @@ -368,8 +369,8 @@ static uint64_t get_cluster_offset(BlockDriverState *bs, /* update L2 table */ tmp = cpu_to_be64(cluster_offset); l2_table[l2_index] = tmp; - if (bdrv_pwrite(bs->file, - l2_offset + l2_index * sizeof(tmp), &tmp, sizeof(tmp)) != sizeof(tmp)) + if (bdrv_pwrite_sync(bs->file, l2_offset + l2_index * sizeof(tmp), + &tmp, sizeof(tmp)) < 0) return 0; } return cluster_offset; @@ -835,8 +836,9 @@ static int qcow_make_empty(BlockDriverState *bs) int ret; memset(s->l1_table, 0, l1_length); - if (bdrv_pwrite(bs->file, s->l1_table_offset, s->l1_table, l1_length) < 0) - return -1; + if (bdrv_pwrite_sync(bs->file, s->l1_table_offset, s->l1_table, + l1_length) < 0) + return -1; ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length); if (ret < 0) return ret; |