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-rw-r--r--fs/gfs2/bmap.c45
1 files changed, 26 insertions, 19 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 97b61955850..41d494d7970 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -269,6 +269,30 @@ static inline __be64 *metapointer(unsigned int height, const struct metapath *mp
return ((__be64 *)(bh->b_data + head_size)) + mp->mp_list[height];
}
+static void gfs2_metapath_ra(struct gfs2_glock *gl,
+ const struct buffer_head *bh, const __be64 *pos)
+{
+ struct buffer_head *rabh;
+ const __be64 *endp = (const __be64 *)(bh->b_data + bh->b_size);
+ const __be64 *t;
+
+ for (t = pos; t < endp; t++) {
+ if (!*t)
+ continue;
+
+ rabh = gfs2_getbuf(gl, be64_to_cpu(*t), CREATE);
+ if (trylock_buffer(rabh)) {
+ if (!buffer_uptodate(rabh)) {
+ rabh->b_end_io = end_buffer_read_sync;
+ submit_bh(READA | REQ_META, rabh);
+ continue;
+ }
+ unlock_buffer(rabh);
+ }
+ brelse(rabh);
+ }
+}
+
/**
* lookup_metapath - Walk the metadata tree to a specific point
* @ip: The inode
@@ -843,7 +867,7 @@ static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct buffer_head *bh = NULL;
- __be64 *top, *bottom, *t2;
+ __be64 *top, *bottom;
u64 bn;
int error;
int mh_size = sizeof(struct gfs2_meta_header);
@@ -872,26 +896,9 @@ static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
goto out;
if (height < ip->i_height - 1) {
- struct buffer_head *rabh;
- for (t2 = top; t2 < bottom; t2++, first = 0) {
- if (!*t2)
- continue;
+ gfs2_metapath_ra(ip->i_gl, bh, top);
- bn = be64_to_cpu(*t2);
- rabh = gfs2_getbuf(ip->i_gl, bn, CREATE);
- if (trylock_buffer(rabh)) {
- if (buffer_uptodate(rabh)) {
- unlock_buffer(rabh);
- brelse(rabh);
- continue;
- }
- rabh->b_end_io = end_buffer_read_sync;
- submit_bh(READA | REQ_META, rabh);
- continue;
- }
- brelse(rabh);
- }
for (; top < bottom; top++, first = 0) {
if (!*top)
continue;