GFS2: Use UUID field in generic superblock
The VFS superblock structure now has a UUID field, so we can use that
in preference to the UUID field in the GFS2 superblock now.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index d3c69eb..8ac9ae1 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -126,8 +126,10 @@
* changed.
*/
-static int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
+static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
{
+ struct gfs2_sb_host *sb = &sdp->sd_sb;
+
if (sb->sb_magic != GFS2_MAGIC ||
sb->sb_type != GFS2_METATYPE_SB) {
if (!silent)
@@ -157,8 +159,10 @@
unlock_page(page);
}
-static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
+static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
{
+ struct gfs2_sb_host *sb = &sdp->sd_sb;
+ struct super_block *s = sdp->sd_vfs;
const struct gfs2_sb *str = buf;
sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
@@ -175,7 +179,7 @@
memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
- memcpy(sb->sb_uuid, str->sb_uuid, 16);
+ memcpy(s->s_uuid, str->sb_uuid, 16);
}
/**
@@ -197,7 +201,7 @@
* Returns: 0 on success or error
*/
-static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
+static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
{
struct super_block *sb = sdp->sd_vfs;
struct gfs2_sb *p;
@@ -227,10 +231,10 @@
return -EIO;
}
p = kmap(page);
- gfs2_sb_in(&sdp->sd_sb, p);
+ gfs2_sb_in(sdp, p);
kunmap(page);
__free_page(page);
- return 0;
+ return gfs2_check_sb(sdp, silent);
}
/**
@@ -247,17 +251,13 @@
unsigned int x;
int error;
- error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
if (error) {
if (!silent)
fs_err(sdp, "can't read superblock\n");
return error;
}
- error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
- if (error)
- return error;
-
sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
GFS2_BASIC_BLOCK_SHIFT;
sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
@@ -340,14 +340,10 @@
/* Try to autodetect */
if (!proto[0] || !table[0]) {
- error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+ error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
if (error)
return error;
- error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
- if (error)
- goto out;
-
if (!proto[0])
proto = sdp->sd_sb.sb_lockproto;
if (!table[0])
@@ -364,7 +360,6 @@
while ((table = strchr(table, '/')))
*table = '_';
-out:
return error;
}
@@ -1119,8 +1114,7 @@
if (sdp->sd_args.ar_statfs_quantum) {
sdp->sd_tune.gt_statfs_slow = 0;
sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
- }
- else {
+ } else {
sdp->sd_tune.gt_statfs_slow = 1;
sdp->sd_tune.gt_statfs_quantum = 30;
}