From: James Simmons <uja.ornl@yahoo.com>
Date: Fri, 21 Sep 2018 15:02:18 +0000 (-0400)
Subject: LU-8066 llite: move /proc/fs/lustre/llite/lazystatfs to sysfs
X-Git-Tag: 2.11.56~42
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=02af2adc9b338d12a83fc7642662979ca9f341db;p=fs%2Flustre-release.git

LU-8066 llite: move /proc/fs/lustre/llite/lazystatfs to sysfs

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

This is a modified version of

Linux-commit: c7fe64bdd0623f5871800ff42842741175f19562

due to the large amount of changes to the OpenSFS/Intel branch.

Change-Id: I279f3361ae7b779bbd186504f5c4072b265330f9
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/32505
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 46d3df9..fe64d7b 100644
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -823,26 +823,27 @@ static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 }
 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 
-static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
+static ssize_t lazystatfs_show(struct kobject *kobj,
+			       struct attribute *attr,
+			       char *buf)
 {
-	struct super_block *sb = m->private;
-	struct ll_sb_info *sbi = ll_s2sbi(sb);
+	struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+					      ll_kset.kobj);
 
-	seq_printf(m, "%u\n",
-		   (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
-	return 0;
+	return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 }
 
-static ssize_t ll_lazystatfs_seq_write(struct file *file,
-				       const char __user *buffer,
-					size_t count, loff_t *off)
+static ssize_t lazystatfs_store(struct kobject *kobj,
+				struct attribute *attr,
+				const char *buffer,
+				size_t count)
 {
-	struct seq_file *m = file->private_data;
-	struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
+	struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+					      ll_kset.kobj);
 	bool val;
 	int rc;
 
-	rc = kstrtobool_from_user(buffer, count, &val);
+	rc = kstrtobool(buffer, &val);
 	if (rc)
 		return rc;
 
@@ -853,7 +854,7 @@ static ssize_t ll_lazystatfs_seq_write(struct file *file,
 
 	return count;
 }
-LPROC_SEQ_FOPS(ll_lazystatfs);
+LUSTRE_RW_ATTR(lazystatfs);
 
 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 {
@@ -1195,8 +1196,6 @@ struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 	  .fops	=	&ll_max_cached_mb_fops			},
 	{ .name	=	"statahead_stats",
 	  .fops	=	&ll_statahead_stats_fops		},
-	{ .name	=	"lazystatfs",
-	  .fops	=	&ll_lazystatfs_fops			},
 	{ .name	=	"max_easize",
 	  .fops	=	&ll_max_easize_fops			},
 	{ .name	=	"default_easize",
@@ -1239,6 +1238,7 @@ static struct attribute *llite_attrs[] = {
 	&lustre_attr_statahead_running_max.attr,
 	&lustre_attr_statahead_max.attr,
 	&lustre_attr_statahead_agl.attr,
+	&lustre_attr_lazystatfs.attr,
 	NULL,
 };