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authorSage Weil <sage@newdream.net>2010-03-01 15:16:56 -0800
committerSage Weil <sage@newdream.net>2010-03-01 15:28:02 -0800
commite9964c102312967a4bc1fd501cb628c4a3b19034 (patch)
tree7bccb0c4e29d94baaf8c30e008ec5aebdccf9c57 /fs/ceph/super.h
parent7af8f1e4aa86720840d3318e4dc225c3c7e5a6d0 (diff)
downloadblackbird-op-linux-e9964c102312967a4bc1fd501cb628c4a3b19034.tar.gz
blackbird-op-linux-e9964c102312967a4bc1fd501cb628c4a3b19034.zip
ceph: fix flush_dirty_caps race with caps migration
The flush_dirty_caps() used to loop over the first entry of the cap_dirty dirty list on the assumption that after calling ceph_check_caps() it would be removed from the list. This isn't true for caps that are being migrated between MDSs, where we've received the EXPORT but not the IMPORT. Instead, do a safe list iteration, and pin the next inode on the list via the CEPH_I_NOFLUSH flag. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/super.h')
-rw-r--r--fs/ceph/super.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index ff7aaa32736c..6a778f2c3f6e 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -289,6 +289,7 @@ struct ceph_inode_xattrs_info {
#define CEPH_I_COMPLETE 1 /* we have complete directory cached */
#define CEPH_I_NODELAY 4 /* do not delay cap release */
#define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
+#define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
struct ceph_inode_info {
struct ceph_vino i_vino; /* ceph ino + snap */
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