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| author | Dave Chinner <dchinner@redhat.com> | 2010-05-21 05:47:59 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2010-05-28 15:19:12 -0500 |
| commit | 07f1a4f5e89cd4e6c79d67d41e8a18c451214ae2 (patch) | |
| tree | a4efa89cd8536b6ff6b75713fd5cc342f4da4f62 /fs | |
| parent | fdc07f44c891d3fdee7722a03e3881614a293b3c (diff) | |
| download | linux-3.10-07f1a4f5e89cd4e6c79d67d41e8a18c451214ae2.tar.gz linux-3.10-07f1a4f5e89cd4e6c79d67d41e8a18c451214ae2.tar.bz2 linux-3.10-07f1a4f5e89cd4e6c79d67d41e8a18c451214ae2.zip | |
xfs: Check new inode size is OK before preallocating
The new xfsqa test 228 tries to preallocate more space than the
filesystem contains. it should fail, but instead triggers an assert
about lock flags. The failure is due to the size extension failing
in vmtruncate() due to rlimit being set. Check this before we start
the preallocation to avoid allocating space that will never be used.
Also the path through xfs_vn_allocate already holds the IO lock, so
it should not be present in the lock flags when the setattr fails.
Hence the assert needs to take this into account. This will prevent
other such callers from hitting this incorrect ASSERT.
(Fixed a reference to "newsize" to read "new_size". -Alex)
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_iops.c | 16 | ||||
| -rw-r--r-- | fs/xfs/xfs_vnodeops.c | 2 |
2 files changed, 14 insertions, 4 deletions
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 9c8019c78c9..44f0b2de153 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -585,11 +585,20 @@ xfs_vn_fallocate( bf.l_len = len; xfs_ilock(ip, XFS_IOLOCK_EXCL); + + /* check the new inode size is valid before allocating */ + if (!(mode & FALLOC_FL_KEEP_SIZE) && + offset + len > i_size_read(inode)) { + new_size = offset + len; + error = inode_newsize_ok(inode, new_size); + if (error) + goto out_unlock; + } + error = -xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, 0, XFS_ATTR_NOLOCK); - if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && - offset + len > i_size_read(inode)) - new_size = offset + len; + if (error) + goto out_unlock; /* Change file size if needed */ if (new_size) { @@ -600,6 +609,7 @@ xfs_vn_fallocate( error = -xfs_setattr(ip, &iattr, XFS_ATTR_NOLOCK); } +out_unlock: xfs_iunlock(ip, XFS_IOLOCK_EXCL); out_error: return error; diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 9d376be0ea3..a06bd62504f 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -267,7 +267,7 @@ xfs_setattr( if (code) { ASSERT(tp == NULL); lock_flags &= ~XFS_ILOCK_EXCL; - ASSERT(lock_flags == XFS_IOLOCK_EXCL); + ASSERT(lock_flags == XFS_IOLOCK_EXCL || !need_iolock); goto error_return; } tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |