fs/xfs/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 counter_val(int idx)
  24 {
  25         int val = 0, cpu;
  26
  27         for_each_possible_cpu(cpu)
  28                 val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx));
  29         return val;
  30 }
  31
  32 static int xfs_stat_proc_show(struct seq_file *m, void *v)
  33 {
  34         int             i, j;
  35         __uint64_t      xs_xstrat_bytes = 0;
  36         __uint64_t      xs_write_bytes = 0;
  37         __uint64_t      xs_read_bytes = 0;
  38
  39         static const struct xstats_entry {
  40                 char    *desc;
  41                 int     endpoint;
  42         } xstats[] = {
  43                 { "extent_alloc",       XFSSTAT_END_EXTENT_ALLOC        },
  44                 { "abt",                XFSSTAT_END_ALLOC_BTREE         },
  45                 { "blk_map",            XFSSTAT_END_BLOCK_MAPPING       },
  46                 { "bmbt",               XFSSTAT_END_BLOCK_MAP_BTREE     },
  47                 { "dir",                XFSSTAT_END_DIRECTORY_OPS       },
  48                 { "trans",              XFSSTAT_END_TRANSACTIONS        },
  49                 { "ig",                 XFSSTAT_END_INODE_OPS           },
  50                 { "log",                XFSSTAT_END_LOG_OPS             },
  51                 { "push_ail",           XFSSTAT_END_TAIL_PUSHING        },
  52                 { "xstrat",             XFSSTAT_END_WRITE_CONVERT       },
  53                 { "rw",                 XFSSTAT_END_READ_WRITE_OPS      },
  54                 { "attr",               XFSSTAT_END_ATTRIBUTE_OPS       },
  55                 { "icluster",           XFSSTAT_END_INODE_CLUSTER       },
  56                 { "vnodes",             XFSSTAT_END_VNODE_OPS           },
  57                 { "buf",                XFSSTAT_END_BUF                 },
  58                 { "abtb2",              XFSSTAT_END_ABTB_V2             },
  59                 { "abtc2",              XFSSTAT_END_ABTC_V2             },
  60                 { "bmbt2",              XFSSTAT_END_BMBT_V2             },
  61                 { "ibt2",               XFSSTAT_END_IBT_V2              },
  62                 /* we print both series of quota information together */
  63                 { "qm",                 XFSSTAT_END_QM                  },
  64         };
  65
  66         /* Loop over all stats groups */
  67         for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
  68                 seq_printf(m, "%s", xstats[i].desc);
  69                 /* inner loop does each group */
  70                 for (; j < xstats[i].endpoint; j++)
  71                         seq_printf(m, " %u", counter_val(j));
  72                 seq_putc(m, '\n');
  73         }
  74         /* extra precision counters */
  75         for_each_possible_cpu(i) {
  76                 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
  77                 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
  78                 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
  79         }
  80
  81         seq_printf(m, "xpc %Lu %Lu %Lu\n",
  82                         xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
  83         seq_printf(m, "debug %u\n",
  84 #if defined(DEBUG)
  85                 1);
  86 #else
  87                 0);
  88 #endif
  89         return 0;
  90 }
  91
  92 static int xfs_stat_proc_open(struct inode *inode, struct file *file)
  93 {
  94         return single_open(file, xfs_stat_proc_show, NULL);
  95 }
  96
  97 static const struct file_operations xfs_stat_proc_fops = {
  98         .owner          = THIS_MODULE,
  99         .open           = xfs_stat_proc_open,
 100         .read           = seq_read,
 101         .llseek         = seq_lseek,
 102         .release        = single_release,
 103 };
 104
 105 /* legacy quota interfaces */
 106 #ifdef CONFIG_XFS_QUOTA
 107 static int xqm_proc_show(struct seq_file *m, void *v)
 108 {
 109         /* maximum; incore; ratio free to inuse; freelist */
 110         seq_printf(m, "%d\t%d\t%d\t%u\n",
 111                         0,
 112                         counter_val(XFSSTAT_END_XQMSTAT),
 113                         0,
 114                         counter_val(XFSSTAT_END_XQMSTAT + 1));
 115         return 0;
 116 }
 117
 118 static int xqm_proc_open(struct inode *inode, struct file *file)
 119 {
 120         return single_open(file, xqm_proc_show, NULL);
 121 }
 122
 123 static const struct file_operations xqm_proc_fops = {
 124         .owner          = THIS_MODULE,
 125         .open           = xqm_proc_open,
 126         .read           = seq_read,
 127         .llseek         = seq_lseek,
 128         .release        = single_release,
 129 };
 130
 131 /* legacy quota stats interface no 2 */
 132 static int xqmstat_proc_show(struct seq_file *m, void *v)
 133 {
 134         int j;
 135
 136         seq_printf(m, "qm");
 137         for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
 138                 seq_printf(m, " %u", counter_val(j));
 139         seq_putc(m, '\n');
 140         return 0;
 141 }
 142
 143 static int xqmstat_proc_open(struct inode *inode, struct file *file)
 144 {
 145         return single_open(file, xqmstat_proc_show, NULL);
 146 }
 147
 148 static const struct file_operations xqmstat_proc_fops = {
 149         .owner          = THIS_MODULE,
 150         .open           = xqmstat_proc_open,
 151         .read           = seq_read,
 152         .llseek         = seq_lseek,
 153         .release        = single_release,
 154 };
 155 #endif /* CONFIG_XFS_QUOTA */
 156
 157 int
 158 xfs_init_procfs(void)
 159 {
 160         if (!proc_mkdir("fs/xfs", NULL))
 161                 goto out;
 162
 163         if (!proc_create("fs/xfs/stat", 0, NULL,
 164                          &xfs_stat_proc_fops))
 165                 goto out_remove_xfs_dir;
 166 #ifdef CONFIG_XFS_QUOTA
 167         if (!proc_create("fs/xfs/xqmstat", 0, NULL,
 168                          &xqmstat_proc_fops))
 169                 goto out_remove_stat_file;
 170         if (!proc_create("fs/xfs/xqm", 0, NULL,
 171                          &xqm_proc_fops))
 172                 goto out_remove_xqmstat_file;
 173 #endif
 174         return 0;
 175
 176 #ifdef CONFIG_XFS_QUOTA
 177  out_remove_xqmstat_file:
 178         remove_proc_entry("fs/xfs/xqmstat", NULL);
 179  out_remove_stat_file:
 180         remove_proc_entry("fs/xfs/stat", NULL);
 181 #endif
 182  out_remove_xfs_dir:
 183         remove_proc_entry("fs/xfs", NULL);
 184  out:
 185         return -ENOMEM;
 186 }
 187
 188 void
 189 xfs_cleanup_procfs(void)
 190 {
 191 #ifdef CONFIG_XFS_QUOTA
 192         remove_proc_entry("fs/xfs/xqm", NULL);
 193         remove_proc_entry("fs/xfs/xqmstat", NULL);
 194 #endif
 195         remove_proc_entry("fs/xfs/stat", NULL);
 196         remove_proc_entry("fs/xfs", NULL);
 197 }