[GFS2] Readpages support

This adds readpages support (and also corrects a small bug in
the readpage error path at the same time). Hopefully this will
improve performance by allowing GFS to submit larger lumps of
I/O at a time.

In order to simplify the setting of BH_Boundary, it currently gets
set when we hit the end of a indirect pointer block. There is
always a boundary at this point with the current allocation code.
It doesn't get all the boundaries right though, so there is still
room for improvement in this.

See comments in fs/gfs2/ops_address.c for further information about
readpages with GFS2.

Signed-off-by: Steven Whitehouse

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 942c4c8b9f5..d49ff43b3a8 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -255,6 +255,7 @@ static int bh_get(struct gfs2_quota_data *qd)
 	int new = 0;
 	struct buffer_head *bh;
 	int error;
+	int boundary;
 
 	mutex_lock(&sdp->sd_quota_mutex);
 
@@ -266,7 +267,7 @@ static int bh_get(struct gfs2_quota_data *qd)
 	block = qd->qd_slot / sdp->sd_qc_per_block;
 	offset = qd->qd_slot % sdp->sd_qc_per_block;;
 
-	error = gfs2_block_map(ip, block, &new, &dblock, NULL);
+	error = gfs2_block_map(ip->i_vnode, block, &new, &dblock, &boundary);
 	if (error)
 		goto fail;
 	error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT, &bh);
@@ -1162,7 +1163,7 @@ int gfs2_quota_init(struct gfs2_sbd *sdp)
 
 		if (!extlen) {
 			int new = 0;
-			error = gfs2_block_map(ip, x, &new, &dblock, &extlen);
+			error = gfs2_extent_map(ip->i_vnode, x, &new, &dblock, &extlen);
 			if (error)
 				goto fail;
 		}