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Date: Thu, 19 May 2011 09:47:24 +0100
From: Steven Whitehouse <swhiteho@...hat.com>
To: linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc: Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 29/32] 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@...hat.com>
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 69a6382..0a064e9 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -488,7 +488,6 @@ struct gfs2_sb_host {
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
- u8 sb_uuid[16];
};
/*
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 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
* 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 @@ static void end_bio_io_page(struct bio *bio, int error)
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 @@ static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
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 @@ static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
* 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 @@ static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
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 @@ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
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 @@ static int init_names(struct gfs2_sbd *sdp, int silent)
/* 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 @@ static int init_names(struct gfs2_sbd *sdp, int silent)
while ((table = strchr(table, '/')))
*table = '_';
-out:
return error;
}
@@ -1119,8 +1114,7 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent
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;
}
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 748ccb5..e20eab3 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -81,7 +81,8 @@ static int gfs2_uuid_valid(const u8 *uuid)
static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
{
- const u8 *uuid = sdp->sd_sb.sb_uuid;
+ struct super_block *s = sdp->sd_vfs;
+ const u8 *uuid = s->s_uuid;
buf[0] = '\0';
if (!gfs2_uuid_valid(uuid))
return 0;
@@ -616,7 +617,8 @@ static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
struct kobj_uevent_env *env)
{
struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
- const u8 *uuid = sdp->sd_sb.sb_uuid;
+ struct super_block *s = sdp->sd_vfs;
+ const u8 *uuid = s->s_uuid;
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
--
1.7.4
--
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