[PATCH 09/58] staging/lustre/llite: move /proc/fs/lustre/llite/uuid to sysfs

[green at linuxhacker.ru]

From: Oleg Drokin <green at linuxhacker.ru>

Move uuid file from /proc/fs/lustre/llite/*
to /sys/fs/lustre/llite/*/

Signed-off-by: Oleg Drokin <green at linuxhacker.ru>
---
 drivers/staging/lustre/lustre/llite/lproc_llite.c | 14 +++++++-------
 drivers/staging/lustre/sysfs-fs-lustre            |  6 ++++++
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c
index 53671db..deee702 100644
--- a/drivers/staging/lustre/lustre/llite/lproc_llite.c
+++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c
@@ -198,15 +198,15 @@ static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
 }
 LUSTRE_RO_ATTR(fstype);
 
-static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
+static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
+			 char *buf)
 {
-	struct super_block *sb = (struct super_block *)m->private;
+	struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+					      ll_kobj);
 
-	LASSERT(sb != NULL);
-	seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
-	return 0;
+	return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
 }
-LPROC_SEQ_FOPS_RO(ll_sb_uuid);
+LUSTRE_RO_ATTR(uuid);
 
 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 {
@@ -837,7 +837,6 @@ static ssize_t ll_xattr_cache_seq_write(struct file *file,
 LPROC_SEQ_FOPS(ll_xattr_cache);
 
 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
-	{ "uuid",	  &ll_sb_uuid_fops,	  NULL, 0 },
 	/* { "mntpt_path",   ll_rd_path,	     0, 0 }, */
 	{ "site",	  &ll_site_stats_fops,    NULL, 0 },
 	/* { "filegroups",   lprocfs_rd_filegroups,  0, 0 }, */
@@ -875,6 +874,7 @@ static struct attribute *llite_attrs[] = {
 	&lustre_attr_filesfree.attr,
 	&lustre_attr_client_type.attr,
 	&lustre_attr_fstype.attr,
+	&lustre_attr_uuid.attr,
 	NULL,
 };
 
diff --git a/drivers/staging/lustre/sysfs-fs-lustre b/drivers/staging/lustre/sysfs-fs-lustre
index 36c20d8..f353d12 100644
--- a/drivers/staging/lustre/sysfs-fs-lustre
+++ b/drivers/staging/lustre/sysfs-fs-lustre
@@ -91,3 +91,9 @@ Date:		May 2015
 Contact:	"Oleg Drokin" <oleg.drokin at intel.com>
 Description:
 		Shows filesystem type of the filesystem
+
+What:		/sys/fs/lustre/llite/<fsname>-<uuid>/uuid
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin at intel.com>
+Description:
+		Shows this filesystem superblock uuid
-- 
2.1.0