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Subject[PATCH 4/4] XFS: Set NOSEC flag early when inode has no xattrs. v2
Date
From: Andi Kleen <ak@linux.intel.com>

Set the S_NOSEC flag early if the inode has no xattrs for XFS.
This avoids a single xattr lookup for the first write on every
file, if the file has no xattrs.

v2: Use helper
Cc: dchinner@redhat.com
Cc: aelder@sgi.com
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
fs/xfs/linux-2.6/xfs_iops.c | 3 +++
fs/xfs/xfs_attr.c | 2 +-
fs/xfs/xfs_attr.h | 1 +
3 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index dd21784..507505b 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -763,6 +763,9 @@ xfs_setup_inode(
break;
}

+ if (!xfs_inode_hasattr(ip))
+ inode_has_no_xattr(inode);
+
xfs_iflags_clear(ip, XFS_INEW);
barrier();

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index c863753..43140db 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -99,7 +99,7 @@ xfs_attr_name_to_xname(
return 0;
}

-STATIC int
+int
xfs_inode_hasattr(
struct xfs_inode *ip)
{
diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h
index e920d68..20f4038 100644
--- a/fs/xfs/xfs_attr.h
+++ b/fs/xfs/xfs_attr.h
@@ -142,5 +142,6 @@ typedef struct xfs_attr_list_context {
int xfs_attr_inactive(struct xfs_inode *dp);
int xfs_attr_rmtval_get(struct xfs_da_args *args);
int xfs_attr_list_int(struct xfs_attr_list_context *);
+int xfs_inode_hasattr(struct xfs_inode *ip);

#endif /* __XFS_ATTR_H__ */
--
1.7.4.4


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