LU-12368 obdclass: don't send multiple statfs RPCs

[fs/lustre-release.git] / lustre / llite / lproc_llite.c

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 2376f62..8728cc7 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -875,6 +875,36 @@ static ssize_t lazystatfs_store(struct kobject *kobj,
 }
 LUSTRE_RW_ATTR(lazystatfs);
 
+static ssize_t statfs_max_age_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 snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
+}
+
+static ssize_t statfs_max_age_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);
+       unsigned int val;
+       int rc;
+
+       rc = kstrtouint(buffer, 10, &val);
+       if (rc)
+               return rc;
+       if (val > OBD_STATFS_CACHE_MAX_AGE)
+               return -EINVAL;
+
+       sbi->ll_statfs_max_age = val;
+
+       return count;
+}
+LUSTRE_RW_ATTR(statfs_max_age);
+
 static ssize_t max_easize_show(struct kobject *kobj,
                               struct attribute *attr,
                               char *buf)
@@ -1477,6 +1507,7 @@ static struct attribute *llite_attrs[] = {
        &lustre_attr_statahead_max.attr,
        &lustre_attr_statahead_agl.attr,
        &lustre_attr_lazystatfs.attr,
+       &lustre_attr_statfs_max_age.attr,
        &lustre_attr_max_easize.attr,
        &lustre_attr_default_easize.attr,
        &lustre_attr_xattr_cache.attr,