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| author | Dave Chinner <dchinner@redhat.com> | 2013-05-20 09:51:09 +1000 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2013-05-24 16:27:41 -0500 |
| commit | 7031d0e1c46e2b1c869458233dd216cb72af41b2 (patch) | |
| tree | ea6b8690937f4a2129eafc176ee8adcaeb8f5293 | |
| parent | 480d7467e4aaa3dc38088baf56bc3eb3599f5d26 (diff) | |
| download | talos-obmc-linux-7031d0e1c46e2b1c869458233dd216cb72af41b2.tar.gz talos-obmc-linux-7031d0e1c46e2b1c869458233dd216cb72af41b2.zip | |
xfs: fix rounding in xfs_free_file_space
The offset passed into xfs_free_file_space() needs to be rounded
down to a certain size, but the rounding mask is built by a 32 bit
variable. Hence the mask will always mask off the upper 32 bits of
the offset and lead to incorrect writeback and invalidation ranges.
This is not actually exposed as a bug because we writeback and
invalidate from the rounded offset to the end of the file, and hence
the offset we are actually punching a hole out of will always be
covered by the code. This needs fixing, however, if we ever want to
use exact ranges for writeback/invalidation here...
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 28ca489c63e9aceed8801d2f82d731b3c9aa50f5)
| -rw-r--r-- | fs/xfs/xfs_vnodeops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 1501f4fa51a6..0176bb21f09a 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1453,7 +1453,7 @@ xfs_free_file_space( xfs_mount_t *mp; int nimap; uint resblks; - uint rounding; + xfs_off_t rounding; int rt; xfs_fileoff_t startoffset_fsb; xfs_trans_t *tp; @@ -1482,7 +1482,7 @@ xfs_free_file_space( inode_dio_wait(VFS_I(ip)); } - rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); + rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); ioffset = offset & ~(rounding - 1); error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, ioffset, -1); |
