GFS2: Add some more info to uevents

With each uevent, we now always include the journal ID. We
can't call it JID since that is already in use by some of
the individual events relating to recovery, so we use
JOURNALID instead. We don't send the JOURNALID for spectator
mounts, since there isn't one.

Also the ADD event now has both RDONLY and SPECTATOR information
to match that of the ONLINE event.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/sys.c

@@ -519,7 +519,14 @@ static struct attribute_group lock_module_group = {
 
 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 {
+	struct super_block *sb = sdp->sd_vfs;
 	int error;
+	char ro[20];
+	char spectator[20];
+	char *envp[] = { ro, spectator, NULL };
+
+	sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
+	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
 
 	sdp->sd_kobj.kset = gfs2_kset;
 	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
@@ -535,7 +542,7 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 	if (error)
 		goto fail_tune;
 
-	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
+	kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
 	return 0;
 
 fail_tune:
@@ -554,7 +561,6 @@ 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)
 {
@@ -563,6 +569,8 @@ static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 
 	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
+	if (!sdp->sd_args.ar_spectator)
+		add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
 	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",
@@ -578,7 +586,6 @@ static struct kset_uevent_ops gfs2_uevent_ops = {
 	.uevent = gfs2_uevent,
 };
 
-
 int gfs2_sys_init(void)
 {
 	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);