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[GFS2] Remove gfs2_databuf in favour of gfs2_bufdata structure

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Removing the gfs2_databuf structure and using gfs2_bufdata instead
is a step towards allowing journaling of data without requiring the
metadata header on each journaled block. The idea is to merge the
code paths for ordered data with that of journaled data, with the
log operations in lops.c tacking account of the different types of
buffers as they are presented to it. Largely the code path for
metadata will be similar too, but obviously through a different set
of log operations.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2006-01-18 13:14:40 +00:00
parent 586dfdaaf3
commit 64fb4eb7d4
5 changed files with 24 additions and 32 deletions
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20
fs/gfs2/lops.c
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@@ -442,15 +442,15 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
{
struct list_head *head = &sdp->sd_log_le_databuf;
LIST_HEAD(started);
struct gfs2_databuf *db;
struct gfs2_bufdata *bd;
struct buffer_head *bh;
while (!list_empty(head)) {
db = list_entry(head->prev, struct gfs2_databuf, db_le.le_list);
list_move(&db->db_le.le_list, &started);
bd = list_entry(head->prev, struct gfs2_bufdata, bd_le.le_list);
list_move(&bd->bd_le.le_list, &started);
gfs2_log_lock(sdp);
bh = db->db_bh;
bh = bd->bd_bh;
if (bh) {
get_bh(bh);
gfs2_log_unlock(sdp);
@@ -464,22 +464,22 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
}
while (!list_empty(&started)) {
db = list_entry(started.next, struct gfs2_databuf,
db_le.le_list);
list_del(&db->db_le.le_list);
bd = list_entry(started.next, struct gfs2_bufdata,
bd_le.le_list);
list_del(&bd->bd_le.le_list);
sdp->sd_log_num_databuf--;
gfs2_log_lock(sdp);
bh = db->db_bh;
bh = bd->bd_bh;
if (bh) {
set_v2db(bh, NULL);
set_v2bd(bh, NULL);
gfs2_log_unlock(sdp);
wait_on_buffer(bh);
brelse(bh);
} else
gfs2_log_unlock(sdp);
kfree(db);
kfree(bd);
}
gfs2_assert_warn(sdp, !sdp->sd_log_num_databuf);