staging/lustre/ldlm: move namespaces/early_lock_cancel to sysfs

Move ldlm display of early_lock_cancel from procfs to sysfs

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 4bba678..667f2ca 100644 (file)
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -276,23 +276,27 @@ static ssize_t lru_size_store(struct kobject *kobj, struct attribute *attr,
 }
 LUSTRE_RW_ATTR(lru_size);
 
-static int lprocfs_elc_seq_show(struct seq_file *m, void *v)
+static ssize_t early_lock_cancel_show(struct kobject *kobj,
+                                     struct attribute *attr,
+                                     char *buf)
 {
-       struct ldlm_namespace *ns = m->private;
-       unsigned int supp = ns_connect_cancelset(ns);
+       struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+                                                ns_kobj);
 
-       return lprocfs_rd_uint(m, &supp);
+       return sprintf(buf, "%d\n", ns_connect_cancelset(ns));
 }
 
-static ssize_t lprocfs_elc_seq_write(struct file *file,
-                               const char __user *buffer,
-                               size_t count, loff_t *off)
+static ssize_t early_lock_cancel_store(struct kobject *kobj,
+                                      struct attribute *attr,
+                                      const char *buffer,
+                                      size_t count)
 {
-       struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
-       unsigned int supp = -1;
+       struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
+                                                ns_kobj);
+       unsigned long supp = -1;
        int rc;
 
-       rc = lprocfs_wr_uint(file, buffer, count, &supp);
+       rc = kstrtoul(buffer, 10, &supp);
        if (rc < 0)
                return rc;
 
@@ -302,13 +306,14 @@ static ssize_t lprocfs_elc_seq_write(struct file *file,
                ns->ns_connect_flags |= OBD_CONNECT_CANCELSET;
        return count;
 }
-LPROC_SEQ_FOPS(lprocfs_elc);
+LUSTRE_RW_ATTR(early_lock_cancel);
 
 /* These are for namespaces in /sys/fs/lustre/ldlm/namespaces/ */
 static struct attribute *ldlm_ns_attrs[] = {
        &lustre_attr_resource_count.attr,
        &lustre_attr_lock_count.attr,
        &lustre_attr_lru_size.attr,
+       &lustre_attr_early_lock_cancel.attr,
        NULL,
 };
 
@@ -401,7 +406,6 @@ int ldlm_namespace_proc_register(struct ldlm_namespace *ns)
                                &ldlm_uint_fops);
                LDLM_NS_ADD_VAR("lru_max_age", &ns->ns_max_age,
                                &ldlm_rw_uint_fops);
-               LDLM_NS_ADD_VAR("early_lock_cancel", ns, &lprocfs_elc_fops);
        } else {
                LDLM_NS_ADD_VAR("ctime_age_limit", &ns->ns_ctime_age_limit,
                                &ldlm_rw_uint_fops);

diff --git a/drivers/staging/lustre/sysfs-fs-lustre b/drivers/staging/lustre/sysfs-fs-lustre
index 0d379d0..e54e485 100644 (file)
--- a/drivers/staging/lustre/sysfs-fs-lustre
+++ b/drivers/staging/lustre/sysfs-fs-lustre
@@ -222,3 +222,16 @@ Description:
                namespace.
                0 - LRU size is unlimited, controlled by server resources
                positive number - number of locks to allow in lock LRU list
+
+What:          /sys/fs/lustre/ldlm/namespaces/<name>/early_lock_cancel
+Date:          May 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls "early lock cancellation" feature on this namespace
+               if supported by the server.
+               When enabled, tries to preemtively cancel locks that would be
+               cancelled by verious operations and bundle the cancellation
+               requests in the same RPC as the main operation, which results
+               in significant speedups due to reduced lock-pingpong RPCs.
+               0 - disabled
+               1 - enabled (default)