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-rw-r--r--fs/gfs2/incore.h1
-rw-r--r--fs/gfs2/ops_fstype.c1
-rw-r--r--fs/gfs2/sys.c37
3 files changed, 39 insertions, 0 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 3f29bd224ba..980a0864ca6 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -470,6 +470,7 @@ 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 e502b379a4d..804ca7273a4 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -234,6 +234,7 @@ 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);
}
/**
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index a78997ea503..4d284d14980 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -36,6 +36,30 @@ static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
}
+static int gfs2_uuid_valid(const u8 *uuid)
+{
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ if (uuid[i])
+ return 1;
+ }
+ return 0;
+}
+
+static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
+{
+ const u8 *uuid = sdp->sd_sb.sb_uuid;
+ buf[0] = '\0';
+ if (!gfs2_uuid_valid(uuid))
+ return 0;
+ return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
+ "%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
+ uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
+ uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
+ uuid[12], uuid[13], uuid[14], uuid[15]);
+}
+
static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
{
unsigned int count;
@@ -158,6 +182,7 @@ static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
GFS2_ATTR(id, 0444, id_show, NULL);
GFS2_ATTR(fsname, 0444, fsname_show, NULL);
+GFS2_ATTR(uuid, 0444, uuid_show, NULL);
GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
@@ -168,6 +193,7 @@ GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
static struct attribute *gfs2_attrs[] = {
&gfs2_attr_id.attr,
&gfs2_attr_fsname.attr,
+ &gfs2_attr_uuid.attr,
&gfs2_attr_freeze.attr,
&gfs2_attr_withdraw.attr,
&gfs2_attr_statfs_sync.attr,
@@ -598,12 +624,23 @@ void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
kobject_put(&sdp->sd_kobj);
}
+
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;
+
add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
+ if (gfs2_uuid_valid(uuid)) {
+ add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
+ "%02X%02X-%02X%02X%02X%02X%02X%02X",
+ uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
+ uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
+ uuid[10], uuid[11], uuid[12], uuid[13],
+ uuid[14], uuid[15]);
+ }
return 0;
}