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authorChristoph Hellwig <hch@lst.de>2016-04-06 07:53:29 +1000
committerDave Chinner <david@fromorbit.com>2016-04-06 07:53:29 +1000
commit30ee052e12b97c190b27fe6f20e3ac3047df7b5c (patch)
tree92b34446e88e72e6ddce730b1f1b4192614a45be /fs/xfs/xfs_symlink.c
parentbfe8804d908a791b16e3686c101f0d7eca9fb5b9 (diff)
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xfs: optimize inline symlinks
By overallocating the in-core inode fork data buffer and zero terminating the link target in xfs_init_local_fork we can avoid the memory allocation in ->follow_link. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_symlink.c')
-rw-r--r--fs/xfs/xfs_symlink.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index b69f4a770fc9..5961c1e880c2 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -131,6 +131,8 @@ xfs_readlink(
trace_xfs_readlink(ip);
+ ASSERT(!(ip->i_df.if_flags & XFS_IFINLINE));
+
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
@@ -150,12 +152,7 @@ xfs_readlink(
}
- if (ip->i_df.if_flags & XFS_IFINLINE) {
- memcpy(link, ip->i_df.if_u1.if_data, pathlen);
- link[pathlen] = '\0';
- } else {
- error = xfs_readlink_bmap(ip, link);
- }
+ error = xfs_readlink_bmap(ip, link);
out:
xfs_iunlock(ip, XFS_ILOCK_SHARED);