1 files changed, 34 insertions, 16 deletions

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 6a78b1b32e25..43a24f2e5905 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -97,7 +97,7 @@ void gfs2_tune_init(struct gfs2_tune *gt)
  * changed.
  */
 
-int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb *sb, int silent)
+int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
 {
         unsigned int x;
 
@@ -180,6 +180,24 @@ static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error)
         return 0;
 }
 
+/**
+ * gfs2_read_super - Read the gfs2 super block from disk
+ * @sb: The VFS super block
+ * @sector: The location of the super block
+ *
+ * This uses the bio functions to read the super block from disk
+ * because we want to be 100% sure that we never read cached data.
+ * A super block is read twice only during each GFS2 mount and is
+ * never written to by the filesystem. The first time its read no
+ * locks are held, and the only details which are looked at are those
+ * relating to the locking protocol. Once locking is up and working,
+ * the sb is read again under the lock to establish the location of
+ * the master directory (contains pointers to journals etc) and the
+ * root directory.
+ *
+ * Returns: A page containing the sb or NULL
+ */
+
 struct page *gfs2_read_super(struct super_block *sb, sector_t sector)
 {
         struct page *page;
@@ -199,7 +217,7 @@ struct page *gfs2_read_super(struct super_block *sb, sector_t sector)
                 return NULL;
         }
 
-        bio->bi_sector = sector;
+        bio->bi_sector = sector * (sb->s_blocksize >> 9);
         bio->bi_bdev = sb->s_bdev;
         bio_add_page(bio, page, PAGE_SIZE, 0);
 
@@ -508,7 +526,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
         struct gfs2_glock *j_gl = ip->i_gl;
         struct gfs2_holder t_gh;
-        struct gfs2_log_header head;
+        struct gfs2_log_header_host head;
         int error;
 
         error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED,
@@ -517,7 +535,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
                 return error;
 
         gfs2_meta_cache_flush(ip);
-        j_gl->gl_ops->go_inval(j_gl, DIO_METADATA | DIO_DATA);
+        j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 
         error = gfs2_find_jhead(sdp->sd_jdesc, &head);
         if (error)
@@ -587,9 +605,9 @@ int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
 int gfs2_statfs_init(struct gfs2_sbd *sdp)
 {
         struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
-        struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
+        struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
         struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
-        struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+        struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
         struct buffer_head *m_bh, *l_bh;
         struct gfs2_holder gh;
         int error;
@@ -634,7 +652,7 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
                         s64 dinodes)
 {
         struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
-        struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+        struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
         struct buffer_head *l_bh;
         int error;
 
@@ -660,8 +678,8 @@ int gfs2_statfs_sync(struct gfs2_sbd *sdp)
 {
         struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
         struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
-        struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
-        struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+        struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
+        struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
         struct gfs2_holder gh;
         struct buffer_head *m_bh, *l_bh;
         int error;
@@ -727,10 +745,10 @@ out:
  * Returns: errno
  */
 
-int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
+int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
 {
-        struct gfs2_statfs_change *m_sc = &sdp->sd_statfs_master;
-        struct gfs2_statfs_change *l_sc = &sdp->sd_statfs_local;
+        struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
+        struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
 
         spin_lock(&sdp->sd_statfs_spin);
 
@@ -760,7 +778,7 @@ int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
  */
 
 static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
-                            struct gfs2_statfs_change *sc)
+                            struct gfs2_statfs_change_host *sc)
 {
         gfs2_rgrp_verify(rgd);
         sc->sc_total += rgd->rd_ri.ri_data;
@@ -782,7 +800,7 @@ static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
  * Returns: errno
  */
 
-int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
+int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
 {
         struct gfs2_holder ri_gh;
         struct gfs2_rgrpd *rgd_next;
@@ -792,7 +810,7 @@ int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change *sc)
         int done;
         int error = 0, err;
 
-        memset(sc, 0, sizeof(struct gfs2_statfs_change));
+        memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
         gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
         if (!gha)
                 return -ENOMEM;
@@ -873,7 +891,7 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
         struct gfs2_jdesc *jd;
         struct lfcc *lfcc;
         LIST_HEAD(list);
-        struct gfs2_log_header lh;
+        struct gfs2_log_header_host lh;
         int error;
 
         error = gfs2_jindex_hold(sdp, &ji_gh);