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authorDave Chinner <dchinner@redhat.com>2013-06-05 12:09:08 +1000
committerBen Myers <bpm@sgi.com>2013-06-05 11:19:10 -0500
commit0a32c26e720a8b38971d0685976f4a7d63f9e2ef (patch)
tree37e87629f9a62e91b67d29d16c757d74709aaf7f /fs/xfs
parenta775ad778073d55744ed6709ccede36310638911 (diff)
downloadop-kernel-dev-0a32c26e720a8b38971d0685976f4a7d63f9e2ef.zip
op-kernel-dev-0a32c26e720a8b38971d0685976f4a7d63f9e2ef.tar.gz
xfs: inode unlinked list needs to recalculate the inode CRC
The inode unlinked list manipulations operate directly on the inode buffer, and so bypass the inode CRC calculation mechanisms. Hence an inode on the unlinked list has an invalid CRC. Fix this by recalculating the CRC whenever we modify an unlinked list pointer in an inode, ncluding during log recovery. This is trivial to do and results in unlinked list operations always leaving a consistent inode in the buffer. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_inode.c16
-rw-r--r--fs/xfs/xfs_log_recover.c9
2 files changed, 25 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index efbe1ac..7f7be5f 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1638,6 +1638,10 @@ xfs_iunlink(
dip->di_next_unlinked = agi->agi_unlinked[bucket_index];
offset = ip->i_imap.im_boffset +
offsetof(xfs_dinode_t, di_next_unlinked);
+
+ /* need to recalc the inode CRC if appropriate */
+ xfs_dinode_calc_crc(mp, dip);
+
xfs_trans_inode_buf(tp, ibp);
xfs_trans_log_buf(tp, ibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
@@ -1723,6 +1727,10 @@ xfs_iunlink_remove(
dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
offset = ip->i_imap.im_boffset +
offsetof(xfs_dinode_t, di_next_unlinked);
+
+ /* need to recalc the inode CRC if appropriate */
+ xfs_dinode_calc_crc(mp, dip);
+
xfs_trans_inode_buf(tp, ibp);
xfs_trans_log_buf(tp, ibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
@@ -1796,6 +1804,10 @@ xfs_iunlink_remove(
dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
offset = ip->i_imap.im_boffset +
offsetof(xfs_dinode_t, di_next_unlinked);
+
+ /* need to recalc the inode CRC if appropriate */
+ xfs_dinode_calc_crc(mp, dip);
+
xfs_trans_inode_buf(tp, ibp);
xfs_trans_log_buf(tp, ibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
@@ -1809,6 +1821,10 @@ xfs_iunlink_remove(
last_dip->di_next_unlinked = cpu_to_be32(next_agino);
ASSERT(next_agino != 0);
offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked);
+
+ /* need to recalc the inode CRC if appropriate */
+ xfs_dinode_calc_crc(mp, last_dip);
+
xfs_trans_inode_buf(tp, last_ibp);
xfs_trans_log_buf(tp, last_ibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 83088d9..45a85ff 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -1912,6 +1912,15 @@ xlog_recover_do_inode_buffer(
buffer_nextp = (xfs_agino_t *)xfs_buf_offset(bp,
next_unlinked_offset);
*buffer_nextp = *logged_nextp;
+
+ /*
+ * If necessary, recalculate the CRC in the on-disk inode. We
+ * have to leave the inode in a consistent state for whoever
+ * reads it next....
+ */
+ xfs_dinode_calc_crc(mp, (struct xfs_dinode *)
+ xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize));
+
}
return 0;
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