LU-11698 libcfs: Add checksum speed under /sys/fs

[fs/lustre-release.git] / lustre / obdclass / obd_sysfs.c

diff --git a/lustre/obdclass/obd_sysfs.c b/lustre/obdclass/obd_sysfs.c
index 8e4cae2..5d9430a 100644 (file)
--- a/lustre/obdclass/obd_sysfs.c
+++ b/lustre/obdclass/obd_sysfs.c
@@ -27,7 +27,6 @@
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
  *
  * lustre/obdclass/obd_sysfs.c
  *
@@ -63,6 +62,7 @@
 #include <linux/kobject.h>
 
 #include <libcfs/libcfs.h>
+#include <libcfs/libcfs_crypto.h>
 #include <obd_support.h>
 #include <obd_class.h>
 #include <lprocfs_status.h>
@@ -280,7 +280,7 @@ static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
        int rc = 0;
 
        if (strlen(obd_jobid_var))
-               rc = snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
+               rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
        return rc;
 }
 
@@ -307,7 +307,7 @@ static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
        int rc = 0;
 
        if (strlen(obd_jobid_name))
-               rc = snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
+               rc = scnprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
        return rc;
 }
 
@@ -349,7 +349,7 @@ static ssize_t jobid_this_session_show(struct kobject *kobj,
        rcu_read_lock();
        jid = jobid_current();
        if (jid)
-               ret = snprintf(buf, PAGE_SIZE, "%s\n", jid);
+               ret = scnprintf(buf, PAGE_SIZE, "%s\n", jid);
        rcu_read_unlock();
        return ret;
 }
@@ -501,6 +501,63 @@ static const struct file_operations obd_device_list_fops = {
        .release = seq_release,
 };
 
+/* checksum_speed */
+static void *checksum_speed_start(struct seq_file *p, loff_t *pos)
+{
+       return pos;
+}
+
+static void checksum_speed_stop(struct seq_file *p, void *v)
+{
+}
+
+static void *checksum_speed_next(struct seq_file *p, void *v, loff_t *pos)
+{
+       ++(*pos);
+       if (*pos >= CFS_HASH_ALG_SPEED_MAX - 1)
+               return NULL;
+
+       return pos;
+}
+
+static int checksum_speed_show(struct seq_file *p, void *v)
+{
+       loff_t index = *(loff_t *)v;
+
+       if (!index || index > CFS_HASH_ALG_SPEED_MAX - 1)
+               return 0;
+
+       seq_printf(p, "%s: %d\n", cfs_crypto_hash_name(index),
+                  cfs_crypto_hash_speeds[index]);
+
+       return 0;
+}
+
+static const struct seq_operations checksum_speed_sops = {
+       .start = checksum_speed_start,
+       .stop = checksum_speed_stop,
+       .next = checksum_speed_next,
+       .show = checksum_speed_show,
+};
+
+static int checksum_speed_open(struct inode *inode, struct file *file)
+{
+       int rc = seq_open(file, &checksum_speed_sops);
+
+       if (rc)
+               return rc;
+
+       return 0;
+}
+
+static const struct file_operations checksum_speed_fops = {
+       .owner   = THIS_MODULE,
+       .open    = checksum_speed_open,
+       .read    = seq_read,
+       .llseek  = seq_lseek,
+       .release = seq_release,
+};
+
 static int
 health_check_seq_show(struct seq_file *m, void *unused)
 {
@@ -593,6 +650,9 @@ int class_procfs_init(void)
        file = debugfs_create_file("health_check", 0444, debugfs_lustre_root,
                                   NULL, &health_check_fops);
 
+       file = debugfs_create_file("checksum_speed", 0444, debugfs_lustre_root,
+                                  NULL, &checksum_speed_fops);
+
        entry = lprocfs_register("fs/lustre", NULL, NULL, NULL);
        if (IS_ERR(entry)) {
                rc = PTR_ERR(entry);