root/fs/xfs/xfs_stats.c

DEFINITIONS

1. counter_val
2. xfs_stats_format
3. xfs_stats_clearall
4. xqm_proc_show
5. xqmstat_proc_show
6. xfs_init_procfs
7. xfs_cleanup_procfs

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #include "xfs.h"
   7 
   8 struct xstats xfsstats;
   9 
  10 static int counter_val(struct xfsstats __percpu *stats, int idx)
  11 {
  12         int val = 0, cpu;
  13 
  14         for_each_possible_cpu(cpu)
  15                 val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx));
  16         return val;
  17 }
  18 
  19 int xfs_stats_format(struct xfsstats __percpu *stats, char *buf)
  20 {
  21         int             i, j;
  22         int             len = 0;
  23         uint64_t        xs_xstrat_bytes = 0;
  24         uint64_t        xs_write_bytes = 0;
  25         uint64_t        xs_read_bytes = 0;
  26 
  27         static const struct xstats_entry {
  28                 char    *desc;
  29                 int     endpoint;
  30         } xstats[] = {
  31                 { "extent_alloc",       xfsstats_offset(xs_abt_lookup)  },
  32                 { "abt",                xfsstats_offset(xs_blk_mapr)    },
  33                 { "blk_map",            xfsstats_offset(xs_bmbt_lookup) },
  34                 { "bmbt",               xfsstats_offset(xs_dir_lookup)  },
  35                 { "dir",                xfsstats_offset(xs_trans_sync)  },
  36                 { "trans",              xfsstats_offset(xs_ig_attempts) },
  37                 { "ig",                 xfsstats_offset(xs_log_writes)  },
  38                 { "log",                xfsstats_offset(xs_try_logspace)},
  39                 { "push_ail",           xfsstats_offset(xs_xstrat_quick)},
  40                 { "xstrat",             xfsstats_offset(xs_write_calls) },
  41                 { "rw",                 xfsstats_offset(xs_attr_get)    },
  42                 { "attr",               xfsstats_offset(xs_iflush_count)},
  43                 { "icluster",           xfsstats_offset(vn_active)      },
  44                 { "vnodes",             xfsstats_offset(xb_get)         },
  45                 { "buf",                xfsstats_offset(xs_abtb_2)      },
  46                 { "abtb2",              xfsstats_offset(xs_abtc_2)      },
  47                 { "abtc2",              xfsstats_offset(xs_bmbt_2)      },
  48                 { "bmbt2",              xfsstats_offset(xs_ibt_2)       },
  49                 { "ibt2",               xfsstats_offset(xs_fibt_2)      },
  50                 { "fibt2",              xfsstats_offset(xs_rmap_2)      },
  51                 { "rmapbt",             xfsstats_offset(xs_refcbt_2)    },
  52                 { "refcntbt",           xfsstats_offset(xs_qm_dqreclaims)},
  53                 /* we print both series of quota information together */
  54                 { "qm",                 xfsstats_offset(xs_xstrat_bytes)},
  55         };
  56 
  57         /* Loop over all stats groups */
  58 
  59         for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
  60                 len += snprintf(buf + len, PATH_MAX - len, "%s",
  61                                 xstats[i].desc);
  62                 /* inner loop does each group */
  63                 for (; j < xstats[i].endpoint; j++)
  64                         len += snprintf(buf + len, PATH_MAX - len, " %u",
  65                                         counter_val(stats, j));
  66                 len += snprintf(buf + len, PATH_MAX - len, "\n");
  67         }
  68         /* extra precision counters */
  69         for_each_possible_cpu(i) {
  70                 xs_xstrat_bytes += per_cpu_ptr(stats, i)->s.xs_xstrat_bytes;
  71                 xs_write_bytes += per_cpu_ptr(stats, i)->s.xs_write_bytes;
  72                 xs_read_bytes += per_cpu_ptr(stats, i)->s.xs_read_bytes;
  73         }
  74 
  75         len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n",
  76                         xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
  77         len += snprintf(buf + len, PATH_MAX-len, "debug %u\n",
  78 #if defined(DEBUG)
  79                 1);
  80 #else
  81                 0);
  82 #endif
  83 
  84         return len;
  85 }
  86 
  87 void xfs_stats_clearall(struct xfsstats __percpu *stats)
  88 {
  89         int             c;
  90         uint32_t        vn_active;
  91 
  92         xfs_notice(NULL, "Clearing xfsstats");
  93         for_each_possible_cpu(c) {
  94                 preempt_disable();
  95                 /* save vn_active, it's a universal truth! */
  96                 vn_active = per_cpu_ptr(stats, c)->s.vn_active;
  97                 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats));
  98                 per_cpu_ptr(stats, c)->s.vn_active = vn_active;
  99                 preempt_enable();
 100         }
 101 }
 102 
 103 #ifdef CONFIG_PROC_FS
 104 /* legacy quota interfaces */
 105 #ifdef CONFIG_XFS_QUOTA
 106 
 107 #define XFSSTAT_START_XQMSTAT xfsstats_offset(xs_qm_dqreclaims)
 108 #define XFSSTAT_END_XQMSTAT xfsstats_offset(xs_qm_dquot)
 109 
 110 static int xqm_proc_show(struct seq_file *m, void *v)
 111 {
 112         /* maximum; incore; ratio free to inuse; freelist */
 113         seq_printf(m, "%d\t%d\t%d\t%u\n",
 114                    0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
 115                    0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
 116         return 0;
 117 }
 118 
 119 /* legacy quota stats interface no 2 */
 120 static int xqmstat_proc_show(struct seq_file *m, void *v)
 121 {
 122         int j;
 123 
 124         seq_printf(m, "qm");
 125         for (j = XFSSTAT_START_XQMSTAT; j < XFSSTAT_END_XQMSTAT; j++)
 126                 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
 127         seq_putc(m, '\n');
 128         return 0;
 129 }
 130 #endif /* CONFIG_XFS_QUOTA */
 131 
 132 int
 133 xfs_init_procfs(void)
 134 {
 135         if (!proc_mkdir("fs/xfs", NULL))
 136                 return -ENOMEM;
 137 
 138         if (!proc_symlink("fs/xfs/stat", NULL,
 139                           "/sys/fs/xfs/stats/stats"))
 140                 goto out;
 141 
 142 #ifdef CONFIG_XFS_QUOTA
 143         if (!proc_create_single("fs/xfs/xqmstat", 0, NULL, xqmstat_proc_show))
 144                 goto out;
 145         if (!proc_create_single("fs/xfs/xqm", 0, NULL, xqm_proc_show))
 146                 goto out;
 147 #endif
 148         return 0;
 149 
 150 out:
 151         remove_proc_subtree("fs/xfs", NULL);
 152         return -ENOMEM;
 153 }
 154 
 155 void
 156 xfs_cleanup_procfs(void)
 157 {
 158         remove_proc_subtree("fs/xfs", NULL);
 159 }
 160 #endif /* CONFIG_PROC_FS */