fs/xfs/xfs_stats.c

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