[ 131/184] ext4: make orphan functions be no-op in no-journal

From: Willy Tarreau
Date: Tue Jun 04 2013 - 18:47:29 EST

2.6.32-longterm review patch. If anyone has any objections, please let me know.


From: Anatol Pomozov <anatol.pomozov@xxxxxxxxx>

Instead of checking whether the handle is valid, we check if journal
is enabled. This avoids taking the s_orphan_lock mutex in all cases
when there is no journal in use, including the error paths where
ext4_orphan_del() is called with a handle set to NULL.

Signed-off-by: Anatol Pomozov <anatol.pomozov@xxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
fs/ext4/namei.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 828c9c9..230bef5 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2001,7 +2001,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0, rc;

- if (!ext4_handle_valid(handle))
+ if (!EXT4_SB(sb)->s_journal)
return 0;

@@ -2082,8 +2082,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
struct ext4_iloc iloc;
int err = 0;

- /* ext4_handle_valid() assumes a valid handle_t pointer */
- if (handle && !ext4_handle_valid(handle))
+ if (!EXT4_SB(inode->i_sb)->s_journal)
return 0;

@@ -2102,7 +2101,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode)
* transaction handle with which to update the orphan list on
* disk, but we still need to remove the inode from the linked
* list in memory. */
- if (sbi->s_journal && !handle)
+ if (!handle)
goto out;

err = ext4_reserve_inode_write(handle, inode, &iloc);

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