GFS2: Move log buffer accounting to transaction

Now we have a master transaction into which other transactions
are merged, the accounting can be done using this master
transaction. We no longer require the superblock fields which
were being used for this function.

In addition, this allows for a clean up in calc_reserved()
making it rather easier understand. Also, by reducing the
number of variables used to track the buffers being added
and removed from the journal, a number of error checks are
now no longer required.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 7 insertions, 8 deletions

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index ee9ec7f..23c6e72 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -494,9 +494,11 @@ static void gfs2_before_commit(struct gfs2_sbd *sdp, unsigned int limit,
 static void buf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 {
 	unsigned int limit = buf_limit(sdp); /* 503 for 4k blocks */
+	unsigned int nbuf;
 	if (tr == NULL)
 		return;
-	gfs2_before_commit(sdp, limit, sdp->sd_log_num_buf, &tr->tr_buf, 0);
+	nbuf = tr->tr_num_buf_new - tr->tr_num_buf_rm;
+	gfs2_before_commit(sdp, limit, nbuf, &tr->tr_buf, 0);
 }
 
 static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
@@ -511,11 +513,8 @@ static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 	while (!list_empty(head)) {
 		bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
 		list_del_init(&bd->bd_list);
-		sdp->sd_log_num_buf--;
-
 		gfs2_unpin(sdp, bd->bd_bh, tr);
 	}
-	gfs2_assert_warn(sdp, !sdp->sd_log_num_buf);
 }
 
 static void buf_lo_before_scan(struct gfs2_jdesc *jd,
@@ -761,10 +760,12 @@ static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
 
 static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 {
-	unsigned int limit = buf_limit(sdp) / 2;
+	unsigned int limit = databuf_limit(sdp);
+	unsigned int nbuf;
 	if (tr == NULL)
 		return;
-	gfs2_before_commit(sdp, limit, sdp->sd_log_num_databuf, &tr->tr_databuf, 1);
+	nbuf = tr->tr_num_databuf_new - tr->tr_num_databuf_rm;
+	gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1);
 }
 
 static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
@@ -849,10 +850,8 @@ static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 	while (!list_empty(head)) {
 		bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
 		list_del_init(&bd->bd_list);
-		sdp->sd_log_num_databuf--;
 		gfs2_unpin(sdp, bd->bd_bh, tr);
 	}
-	gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);
 }