[PATCH] quota: reiserfs: improve quota credit estimates

Use improved credits estimates for quota operations.  Also reserve space
for a quota operation in a transaction only if filesystem was mounted with
some quota option.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 13 insertions, 4 deletions

diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index 32148625fc2f..4c7c5689ad93 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -1644,11 +1644,18 @@ struct reiserfs_journal_header {
 #define JOURNAL_MAX_TRANS_AGE 30
 #define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9)
 #ifdef CONFIG_QUOTA
-#define REISERFS_QUOTA_TRANS_BLOCKS 2   /* We need to update data and inode (atime) */
-#define REISERFS_QUOTA_INIT_BLOCKS (DQUOT_MAX_WRITES*(JOURNAL_PER_BALANCE_CNT+2)+1)     /* 1 balancing, 1 bitmap, 1 data per write + stat data update */
+/* 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)
+/* 1 balancing, 1 bitmap, 1 data per write + stat data update */
+#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & (1<<REISERFS_QUOTA) ? \
+(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0)
+/* same as with INIT */
+#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & (1<<REISERFS_QUOTA) ? \
+(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0)
 #else
-#define REISERFS_QUOTA_TRANS_BLOCKS 0
-#define REISERFS_QUOTA_INIT_BLOCKS 0
+#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0
+#define REISERFS_QUOTA_INIT_BLOCKS(s) 0
+#define REISERFS_QUOTA_DEL_BLOCKS(s) 0
 #endif
 
 /* both of these can be as low as 1, or as high as you want.  The min is the
diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h
index 37a3a7afbec7..31c709d0fe18 100644
--- a/include/linux/reiserfs_fs_sb.h
+++ b/include/linux/reiserfs_fs_sb.h
@@ -467,6 +467,8 @@ enum reiserfs_mount_options {
     REISERFS_ERROR_RO,
     REISERFS_ERROR_CONTINUE,
 
+    REISERFS_QUOTA,             /* Some quota option specified */
+
     REISERFS_TEST1,
     REISERFS_TEST2,
     REISERFS_TEST3,