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

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

This is a modified version of

Linux-commit: 070c29ca79ef5a3ba753053928371b257064b15f

Change-Id: I0fa7715cd2ae9c90af1540e406c1645a8eee3b2e
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/32507
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 46b4743..0f6cfa7 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -259,37 +259,6 @@ static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
 }
 LUSTRE_RO_ATTR(uuid);
 
-static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
-{
-       struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
-
-       seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
-       return 0;
-}
-
-static ssize_t ll_xattr_cache_seq_write(struct file *file,
-                                       const char __user *buffer,
-                                       size_t count, loff_t *off)
-{
-       struct seq_file *m = file->private_data;
-       struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
-       bool val;
-       int rc;
-
-       rc = kstrtobool_from_user(buffer, count, &val);
-       if (rc)
-               return rc;
-
-       if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
-               return -ENOTSUPP;
-
-       sbi->ll_xattr_cache_enabled = val;
-       sbi->ll_xattr_cache_set = 1;
-
-       return count;
-}
-LPROC_SEQ_FOPS(ll_xattr_cache);
-
 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 {
        struct super_block *sb = m->private;
@@ -965,6 +934,40 @@ static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 }
 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 
+static ssize_t xattr_cache_show(struct kobject *kobj,
+                               struct attribute *attr,
+                               char *buf)
+{
+       struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+                                             ll_kset.kobj);
+
+       return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
+}
+
+static ssize_t xattr_cache_store(struct kobject *kobj,
+                                struct attribute *attr,
+                                const char *buffer,
+                                size_t count)
+{
+       struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
+                                             ll_kset.kobj);
+       bool val;
+       int rc;
+
+       rc = kstrtobool(buffer, &val);
+       if (rc)
+               return rc;
+
+       if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
+               return -ENOTSUPP;
+
+       sbi->ll_xattr_cache_enabled = val;
+       sbi->ll_xattr_cache_set = 1;
+
+       return count;
+}
+LUSTRE_RW_ATTR(xattr_cache);
+
 static int ll_tiny_write_seq_show(struct seq_file *m, void *v)
 {
        struct super_block *sb = m->private;
@@ -1200,8 +1203,6 @@ struct lprocfs_vars lprocfs_llite_obd_vars[] = {
          .fops =       &ll_statahead_stats_fops                },
        { .name =       "sbi_flags",
          .fops =       &ll_sbi_flags_fops                      },
-       { .name =       "xattr_cache",
-         .fops =       &ll_xattr_cache_fops                    },
        { .name =       "unstable_stats",
          .fops =       &ll_unstable_stats_fops                 },
        { .name =       "root_squash",
@@ -1239,6 +1240,7 @@ static struct attribute *llite_attrs[] = {
        &lustre_attr_lazystatfs.attr,
        &lustre_attr_max_easize.attr,
        &lustre_attr_default_easize.attr,
+       &lustre_attr_xattr_cache.attr,
        NULL,
 };