gfs2: Extended attribute readahead
When gfs2 allocates an inode and its extended attribute block next to
each other at inode create time, the inode's directory entry indicates
that in de_rahead. In that case, we can readahead the extended
attribute block when we read in the inode.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index ad8a5b7..c248659 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -108,7 +108,7 @@
struct buffer_head *bh;
int error;
- error = gfs2_meta_read(ip->i_gl, block, DIO_WAIT, &bh);
+ error = gfs2_meta_read(ip->i_gl, block, DIO_WAIT, 0, &bh);
if (error)
return error;
if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_JD)) {
@@ -305,7 +305,7 @@
BUG_ON(extlen < 1);
bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
} else {
- error = gfs2_meta_read(ip->i_gl, dblock, DIO_WAIT, &bh);
+ error = gfs2_meta_read(ip->i_gl, dblock, DIO_WAIT, 0, &bh);
if (error)
goto fail;
}
@@ -723,7 +723,7 @@
{
int error;
- error = gfs2_meta_read(dip->i_gl, leaf_no, DIO_WAIT, bhp);
+ error = gfs2_meta_read(dip->i_gl, leaf_no, DIO_WAIT, 0, bhp);
if (!error && gfs2_metatype_check(GFS2_SB(&dip->i_inode), *bhp, GFS2_METATYPE_LF)) {
/* pr_info("block num=%llu\n", leaf_no); */
error = -EIO;
@@ -1560,15 +1560,22 @@
dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
if (dent) {
+ struct inode *inode;
+ u16 rahead;
+
if (IS_ERR(dent))
return ERR_CAST(dent);
dtype = be16_to_cpu(dent->de_type);
+ rahead = be16_to_cpu(dent->de_rahead);
addr = be64_to_cpu(dent->de_inum.no_addr);
formal_ino = be64_to_cpu(dent->de_inum.no_formal_ino);
brelse(bh);
if (fail_on_exist)
return ERR_PTR(-EEXIST);
- return gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino, 0);
+ inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino, 0);
+ if (!IS_ERR(inode))
+ GFS2_I(inode)->i_rahead = rahead;
+ return inode;
}
return ERR_PTR(-ENOENT);
}