fs/xfs/linux-2.6/xfs_stats.c

   1 /*
   2  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include <linux/proc_fs.h>
  20
  21 DEFINE_PER_CPU(struct xfsstats, xfsstats);
  22
  23 static int xfs_stat_proc_show(struct seq_file *m, void *v)
  24 {
  25         int             c, i, j, val;
  26         __uint64_t      xs_xstrat_bytes = 0;
  27         __uint64_t      xs_write_bytes = 0;
  28         __uint64_t      xs_read_bytes = 0;
  29
  30         static const struct xstats_entry {
  31                 char    *desc;
  32                 int     endpoint;
  33         } xstats[] = {
  34                 { "extent_alloc",       XFSSTAT_END_EXTENT_ALLOC        },
  35                 { "abt",                XFSSTAT_END_ALLOC_BTREE         },
  36                 { "blk_map",            XFSSTAT_END_BLOCK_MAPPING       },
  37                 { "bmbt",               XFSSTAT_END_BLOCK_MAP_BTREE     },
  38                 { "dir",                XFSSTAT_END_DIRECTORY_OPS       },
  39                 { "trans",              XFSSTAT_END_TRANSACTIONS        },
  40                 { "ig",                 XFSSTAT_END_INODE_OPS           },
  41                 { "log",                XFSSTAT_END_LOG_OPS             },
  42                 { "push_ail",           XFSSTAT_END_TAIL_PUSHING        },
  43                 { "xstrat",             XFSSTAT_END_WRITE_CONVERT       },
  44                 { "rw",                 XFSSTAT_END_READ_WRITE_OPS      },
  45                 { "attr",               XFSSTAT_END_ATTRIBUTE_OPS       },
  46                 { "icluster",           XFSSTAT_END_INODE_CLUSTER       },
  47                 { "vnodes",             XFSSTAT_END_VNODE_OPS           },
  48                 { "buf",                XFSSTAT_END_BUF                 },
  49                 { "abtb2",              XFSSTAT_END_ABTB_V2             },
  50                 { "abtc2",              XFSSTAT_END_ABTC_V2             },
  51                 { "bmbt2",              XFSSTAT_END_BMBT_V2             },
  52                 { "ibt2",               XFSSTAT_END_IBT_V2              },
  53         };
  54
  55         /* Loop over all stats groups */
  56         for (i=j = 0; i < ARRAY_SIZE(xstats); i++) {
  57                 seq_printf(m, "%s", xstats[i].desc);
  58                 /* inner loop does each group */
  59                 while (j < xstats[i].endpoint) {
  60                         val = 0;
  61                         /* sum over all cpus */
  62                         for_each_possible_cpu(c)
  63                                 val += *(((__u32*)&per_cpu(xfsstats, c) + j));
  64                         seq_printf(m, " %u", val);
  65                         j++;
  66                 }
  67                 seq_putc(m, '\n');
  68         }
  69         /* extra precision counters */
  70         for_each_possible_cpu(i) {
  71                 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
  72                 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
  73                 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
  74         }
  75
  76         seq_printf(m, "xpc %Lu %Lu %Lu\n",
  77                         xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
  78         seq_printf(m, "debug %u\n",
  79 #if defined(DEBUG)
  80                 1);
  81 #else
  82                 0);
  83 #endif
  84         return 0;
  85 }
  86
  87 static int xfs_stat_proc_open(struct inode *inode, struct file *file)
  88 {
  89         return single_open(file, xfs_stat_proc_show, NULL);
  90 }
  91
  92 static const struct file_operations xfs_stat_proc_fops = {
  93         .owner          = THIS_MODULE,
  94         .open           = xfs_stat_proc_open,
  95         .read           = seq_read,
  96         .llseek         = seq_lseek,
  97         .release        = single_release,
  98 };
  99
 100 int
 101 xfs_init_procfs(void)
 102 {
 103         if (!proc_mkdir("fs/xfs", NULL))
 104                 goto out;
 105
 106         if (!proc_create("fs/xfs/stat", 0, NULL,
 107                          &xfs_stat_proc_fops))
 108                 goto out_remove_entry;
 109         return 0;
 110
 111  out_remove_entry:
 112         remove_proc_entry("fs/xfs", NULL);
 113  out:
 114         return -ENOMEM;
 115 }
 116
 117 void
 118 xfs_cleanup_procfs(void)
 119 {
 120         remove_proc_entry("fs/xfs/stat", NULL);
 121         remove_proc_entry("fs/xfs", NULL);
 122 }