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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-06-04 00:41:42 (GMT) |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-06-06 08:14:40 (GMT) |
| commit | d865177a5e749827f248f6363f5100d3a2f66b0f (patch) | |
| tree | 2c5b0d1c16e2e64f406b309926b176f4458dc599 /fs | |
| parent | 65d4f4c151a5fa7b2dacaaf70def3f95001766d7 (diff) | |
| download | linux-d865177a5e749827f248f6363f5100d3a2f66b0f.tar.xz | |
Btrfs: clear uptodate flags of pages in sys_array eb
We set uptodate flag to pages in the temporary sys_array eb,
but do not clear the flag after free eb. As the special
btree inode may still hold a reference on those pages, the
uptodate flag can remain alive in them.
If btrfs_super_chunk_root has been intentionally changed to the
offset of this sys_array eb, reading chunk_root will read content
of sys_array and it will skip our beautiful checks in
btree_readpage_end_io_hook() because of
"pages of eb are uptodate => eb is uptodate"
This adds the 'clear uptodate' part to force it to read from disk.
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/volumes.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 673c72a..42ccde4 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6631,12 +6631,14 @@ int btrfs_read_sys_array(struct btrfs_root *root) sb_array_offset += len; cur_offset += len; } + clear_extent_buffer_uptodate(sb); free_extent_buffer_stale(sb); return ret; out_short_read: printk(KERN_ERR "BTRFS: sys_array too short to read %u bytes at offset %u\n", len, cur_offset); + clear_extent_buffer_uptodate(sb); free_extent_buffer_stale(sb); return -EIO; } |