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authorSage Weil <sage@newdream.net>2011-11-30 09:47:09 -0800
committerSage Weil <sage@newdream.net>2011-12-07 10:46:44 -0800
commitbe655596b3de5873f994ddbe205751a5ffb4de39 (patch)
treecf6e53c6344f87a47ac68d6a6ff4d7dac6e5c25e /fs/ceph/mds_client.h
parent51703306b3b9ea7c05728040998521e47358147b (diff)
downloadlinux-be655596b3de5873f994ddbe205751a5ffb4de39.tar.bz2
ceph: use i_ceph_lock instead of i_lock
We have been using i_lock to protect all kinds of data structures in the ceph_inode_info struct, including lists of inodes that we need to iterate over while avoiding races with inode destruction. That requires grabbing a reference to the inode with the list lock protected, but igrab() now takes i_lock to check the inode flags. Changing the list lock ordering would be a painful process. However, using a ceph-specific i_ceph_lock in the ceph inode instead of i_lock is a simple mechanical change and avoids the ordering constraints imposed by igrab(). Reported-by: Amon Ott <a.ott@m-privacy.de> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/mds_client.h')
-rw-r--r--fs/ceph/mds_client.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 4bb239921dbd..a50ca0e39475 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -20,7 +20,7 @@
*
* mdsc->snap_rwsem
*
- * inode->i_lock
+ * ci->i_ceph_lock
* mdsc->snap_flush_lock
* mdsc->cap_delay_lock
*