staging/lustre/ptlrpc: move procfs high_priority_ratio file to sysfs

Move ptlrpc service high_priority_ratio entry from procfs to sysfs.
Currently in use only by ldlm callback service only in
/sys/fs/lustre/ldlm/services/ldlm_cbd/

Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index ae16450..92d1ce9 100644 (file)
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -1018,23 +1018,26 @@ static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
 }
 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
 
-static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
+static ssize_t high_priority_ratio_show(struct kobject *kobj,
+                                       struct attribute *attr,
+                                       char *buf)
 {
-       struct ptlrpc_service *svc = m->private;
-       seq_printf(m, "%d", svc->srv_hpreq_ratio);
-       return 0;
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       return sprintf(buf, "%d\n", svc->srv_hpreq_ratio);
 }
 
-static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
-                                            const char __user *buffer,
-                                            size_t count,
-                                            loff_t *off)
+static ssize_t high_priority_ratio_store(struct kobject *kobj,
+                                        struct attribute *attr,
+                                        const char *buffer,
+                                        size_t count)
 {
-       struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
-       int     rc;
-       int     val;
+       struct ptlrpc_service *svc = container_of(kobj, struct ptlrpc_service,
+                                                 srv_kobj);
+       int rc;
+       unsigned long val;
 
-       rc = lprocfs_write_helper(buffer, count, &val);
+       rc = kstrtoul(buffer, 10, &val);
        if (rc < 0)
                return rc;
 
@@ -1047,12 +1050,13 @@ static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
 
        return count;
 }
-LPROC_SEQ_FOPS(ptlrpc_lprocfs_hp_ratio);
+LUSTRE_RW_ATTR(high_priority_ratio);
 
 static struct attribute *ptlrpc_svc_attrs[] = {
        &lustre_attr_threads_min.attr,
        &lustre_attr_threads_started.attr,
        &lustre_attr_threads_max.attr,
+       &lustre_attr_high_priority_ratio.attr,
        NULL,
 };
 
@@ -1096,9 +1100,6 @@ void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
                                     struct ptlrpc_service *svc)
 {
        struct lprocfs_vars lproc_vars[] = {
-               {.name       = "high_priority_ratio",
-                .fops       = &ptlrpc_lprocfs_hp_ratio_fops,
-                .data       = svc},
                {.name       = "req_buffer_history_len",
                 .fops       = &ptlrpc_lprocfs_req_history_len_fops,
                 .data       = svc},

diff --git a/drivers/staging/lustre/sysfs-fs-lustre b/drivers/staging/lustre/sysfs-fs-lustre
index ed09a11..9817cb3 100644 (file)
--- a/drivers/staging/lustre/sysfs-fs-lustre
+++ b/drivers/staging/lustre/sysfs-fs-lustre
@@ -329,3 +329,10 @@ Date:              May 2015
 Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
 Description:
                Shows actual number of ldlm callback threads running.
+
+What:          /sys/fs/lustre/ldlm/services/ldlm_cbd/high_priority_ratio
+Date:          May 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls what percentage of ldlm callback threads is dedicated
+               to "high priority" incoming requests.