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GFS2: Use UUID field in generic superblock

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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>
This commit is contained in:
Steven Whitehouse 2011-05-10 15:01:59 +01:00
parent 2ab9cd1c63
commit 32e471ef10
3 changed files with 17 additions and 22 deletions
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1
fs/gfs2/incore.h
View File

@ -488,7 +488,6 @@ struct gfs2_sb_host {
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
u8 sb_uuid[16];
};
/*

32
fs/gfs2/ops_fstype.c
View File

@ -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;
}

6
fs/gfs2/sys.c
View File

@ -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);