lustre/ost/lproc_ost.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_OST
  23
  24 #include <linux/obd_class.h>
  25 #include <linux/lprocfs_status.h>
  26 #include <linux/seq_file.h>
  27
  28 #ifndef LPROCFS
  29 static struct lprocfs_vars lprocfs_obd_vars[]  = { {0} };
  30 static struct lprocfs_vars lprocfs_module_vars[] = { {0} };
  31 #else
  32 static struct lprocfs_vars lprocfs_obd_vars[] = {
  33         { "uuid",            lprocfs_rd_uuid,   0, 0 },
  34         { 0 }
  35 };
  36
  37 static struct lprocfs_vars lprocfs_module_vars[] = {
  38         { "num_refs",       lprocfs_rd_numrefs, 0, 0 },
  39         { 0 }
  40 };
  41
  42 #define PRINTF_STIME(stime) (unsigned long)(stime)->st_num,     \
  43         lprocfs_stime_avg_ms(stime), lprocfs_stime_avg_us(stime)
  44
  45 static int ost_stimes_seq_show(struct seq_file *seq, void *v)
  46 {
  47         struct timeval now;
  48         struct obd_device *dev = seq->private;
  49         struct ost_obd *ost = &dev->u.ost;
  50
  51         do_gettimeofday(&now);
  52
  53         spin_lock(&ost->ost_lock);
  54
  55         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
  56                    now.tv_sec, now.tv_usec);
  57
  58         seq_printf(seq, "\nread rpc service time: (rpcs, average ms)\n");
  59         seq_printf(seq, "\tprep\t%lu\t%lu.%04lu\n",
  60                         PRINTF_STIME(&ost->ost_stimes[0]));
  61         seq_printf(seq, "\tbulk\t%lu\t%lu.%04lu\n\n",
  62                         PRINTF_STIME(&ost->ost_stimes[1]));
  63         seq_printf(seq, "\tcommit\t%lu\t%lu.%04lu\n\n",
  64                         PRINTF_STIME(&ost->ost_stimes[2]));
  65
  66         seq_printf(seq, "\nwrite rpc service time: (rpcs, average ms)\n");
  67         seq_printf(seq, "\tprep\t%lu\t%lu.%04lu\n",
  68                         PRINTF_STIME(&ost->ost_stimes[3]));
  69         seq_printf(seq, "\tbulk\t%lu\t%lu.%04lu\n\n",
  70                         PRINTF_STIME(&ost->ost_stimes[4]));
  71         seq_printf(seq, "\tcommit\t%lu\t%lu.%04lu\n\n",
  72                         PRINTF_STIME(&ost->ost_stimes[5]));
  73
  74         spin_unlock(&ost->ost_lock);
  75
  76         return 0;
  77 }
  78
  79 static void *ost_stimes_seq_start(struct seq_file *p, loff_t *pos)
  80 {
  81         if (*pos == 0)
  82                 return (void *)1;
  83         return NULL;
  84 }
  85 static void *ost_stimes_seq_next(struct seq_file *p, void *v, loff_t *pos)
  86 {
  87         ++*pos;
  88         return NULL;
  89 }
  90 static void ost_stimes_seq_stop(struct seq_file *p, void *v)
  91 {
  92 }
  93 struct seq_operations ost_stimes_seq_sops = {
  94         .start = ost_stimes_seq_start,
  95         .stop = ost_stimes_seq_stop,
  96         .next = ost_stimes_seq_next,
  97         .show = ost_stimes_seq_show,
  98 };
  99
 100 static int ost_stimes_seq_open(struct inode *inode, struct file *file)
 101 {
 102         struct proc_dir_entry *dp = PDE(inode);
 103         struct seq_file *seq;
 104         int rc;
 105
 106         rc = seq_open(file, &ost_stimes_seq_sops);
 107         if (rc)
 108                 return rc;
 109         seq = file->private_data;
 110         seq->private = dp->data;
 111         return 0;
 112 }
 113
 114 static ssize_t ost_stimes_seq_write(struct file *file, const char *buf,
 115                                        size_t len, loff_t *off)
 116 {
 117         struct seq_file *seq = file->private_data;
 118         struct obd_device *dev = seq->private;
 119         struct ost_obd *ost = &dev->u.ost;
 120
 121         spin_lock(&ost->ost_lock);
 122         memset(&ost->ost_stimes, 0, sizeof(ost->ost_stimes));
 123         spin_unlock(&ost->ost_lock);
 124
 125         return len;
 126 }
 127
 128 struct file_operations ost_stimes_fops = {
 129         .owner   = THIS_MODULE,
 130         .open    = ost_stimes_seq_open,
 131         .read    = seq_read,
 132         .write   = ost_stimes_seq_write,
 133         .llseek  = seq_lseek,
 134         .release = seq_release,
 135 };
 136
 137 #endif /* LPROCFS */
 138 LPROCFS_INIT_VARS(ost, lprocfs_module_vars, lprocfs_obd_vars)