[GFS2] Fix for root inode ref count bug

Umount is now working correctly again. The bug was due to
not getting an extra ref count when mounting the fs. We
should have bumped it by two (once for the internal pointer
to the root inode from the super block and once for the
inode hanging off the dcache entry for root).

Also this patch tidys up the code dealing with looking up
and creating inodes. We now pass Linux inodes (with gfs2_inodes
attached) rather than the other way around and this reduces code
duplication in various places.

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

1 files changed, 14 insertions, 16 deletions

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index dd41863810d7..23be00141901 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -177,7 +177,7 @@ static void buf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
 static void buf_lo_before_scan(struct gfs2_jdesc *jd,
                                struct gfs2_log_header *head, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
 
         if (pass != 0)
                 return;
@@ -190,8 +190,8 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
                                 struct gfs2_log_descriptor *ld, __be64 *ptr,
                                 int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
-        struct gfs2_glock *gl = jd->jd_inode->i_gl;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
+        struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl;
         unsigned int blks = be32_to_cpu(ld->ld_data1);
         struct buffer_head *bh_log, *bh_ip;
         uint64_t blkno;
@@ -236,16 +236,16 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
 
 static void buf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
 
         if (error) {
-                gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+                gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
                 return;
         }
         if (pass != 1)
                 return;
 
-        gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+        gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
 
         fs_info(sdp, "jid=%u: Replayed %u of %u blocks\n",
                 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);
@@ -320,7 +320,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp)
 static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
                                   struct gfs2_log_header *head, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
 
         if (pass != 0)
                 return;
@@ -333,7 +333,7 @@ static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
                                    struct gfs2_log_descriptor *ld, __be64 *ptr,
                                    int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
         unsigned int blks = be32_to_cpu(ld->ld_length);
         unsigned int revokes = be32_to_cpu(ld->ld_data1);
         struct buffer_head *bh;
@@ -379,7 +379,7 @@ static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
 
 static void revoke_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
 
         if (error) {
                 gfs2_revoke_clean(sdp);
@@ -458,8 +458,6 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
                 gfs2_trans_add_gl(bd->bd_gl);
                 list_add(&bd->bd_list_tr, &tr->tr_list_buf);
                 gfs2_pin(sdp, bd->bd_bh);
-        } else {
-                clear_buffer_pinned(bd->bd_bh);
         }
         gfs2_log_lock(sdp);
         if (ip->i_di.di_flags & GFS2_DIF_JDATA)
@@ -630,8 +628,8 @@ static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
                                     struct gfs2_log_descriptor *ld,
                                     __be64 *ptr, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
-        struct gfs2_glock *gl = jd->jd_inode->i_gl;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
+        struct gfs2_glock *gl = get_v2ip(jd->jd_inode)->i_gl;
         unsigned int blks = be32_to_cpu(ld->ld_data1);
         struct buffer_head *bh_log, *bh_ip;
         uint64_t blkno;
@@ -680,17 +678,17 @@ static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
 
 static void databuf_lo_after_scan(struct gfs2_jdesc *jd, int error, int pass)
 {
-        struct gfs2_sbd *sdp = jd->jd_inode->i_sbd;
+        struct gfs2_sbd *sdp = get_v2ip(jd->jd_inode)->i_sbd;
 
         if (error) {
-                gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+                gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
                 return;
         }
         if (pass != 1)
                 return;
 
         /* data sync? */
-        gfs2_meta_sync(jd->jd_inode->i_gl, DIO_START | DIO_WAIT);
+        gfs2_meta_sync(get_v2ip(jd->jd_inode)->i_gl, DIO_START | DIO_WAIT);
 
         fs_info(sdp, "jid=%u: Replayed %u of %u data blocks\n",
                 jd->jd_jid, sdp->sd_replayed_blocks, sdp->sd_found_blocks);