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authorJeff Mahoney <jeffm@suse.com>2009-03-30 22:02:39 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-30 23:16:38 +0400
commit0ab2621ebd9a28bf7a524ecd50d492a10579dfcc (patch)
tree62dda6de2fed116aff363190f95a58d56c690e3e /include/linux/reiserfs_fs.h
parent48b32a3553a54740d236b79a90f20147a25875e3 (diff)
downloadlinux-0ab2621ebd9a28bf7a524ecd50d492a10579dfcc.tar.xz
reiserfs: journaled xattrs
Deadlocks are possible in the xattr code between the journal lock and the xattr sems. This patch implements journalling for xattr operations. The benefit is twofold: * It gets rid of the deadlock possibility by always ensuring that xattr write operations are initiated inside a transaction. * It corrects the problem where xattr backing files aren't considered any differently than normal files, despite the fact they are metadata. I discussed the added journal load with Chris Mason, and we decided that since xattrs (versus other journal activity) is fairly rare, the introduction of larger transactions to support journaled xattrs wouldn't be too big a deal. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/reiserfs_fs.h')
-rw-r--r--include/linux/reiserfs_fs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index e00d240314c5..67ad310fa88b 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -1615,6 +1615,10 @@ struct reiserfs_journal_header {
#define JOURNAL_MAX_COMMIT_AGE 30
#define JOURNAL_MAX_TRANS_AGE 30
#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9)
+#define JOURNAL_BLOCKS_PER_OBJECT(sb) (JOURNAL_PER_BALANCE_CNT * 3 + \
+ 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \
+ REISERFS_QUOTA_TRANS_BLOCKS(sb)))
+
#ifdef CONFIG_QUOTA
/* We need to update data and inode (atime) */
#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & (1<<REISERFS_QUOTA) ? 2 : 0)