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
   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         uint64_t        defer_relog = 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_rmap_mem_2)  },
  54                 { "rmapbt_mem",         xfsstats_offset(xs_rcbag_2)     },
  55                 { "rcbagbt",            xfsstats_offset(xs_qm_dqreclaims)},
  56                 /* we print both series of quota information together */
  57                 { "qm",                 xfsstats_offset(xs_xstrat_bytes)},
  58         };
  59
  60         /* Loop over all stats groups */
  61
  62         for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
  63                 len += scnprintf(buf + len, PATH_MAX - len, "%s",
  64                                 xstats[i].desc);
  65                 /* inner loop does each group */
  66                 for (; j < xstats[i].endpoint; j++)
  67                         len += scnprintf(buf + len, PATH_MAX - len, " %u",
  68                                         counter_val(stats, j));
  69                 len += scnprintf(buf + len, PATH_MAX - len, "\n");
  70         }
  71         /* extra precision counters */
  72         for_each_possible_cpu(i) {
  73                 xs_xstrat_bytes += per_cpu_ptr(stats, i)->s.xs_xstrat_bytes;
  74                 xs_write_bytes += per_cpu_ptr(stats, i)->s.xs_write_bytes;
  75                 xs_read_bytes += per_cpu_ptr(stats, i)->s.xs_read_bytes;
  76                 defer_relog += per_cpu_ptr(stats, i)->s.defer_relog;
  77         }
  78
  79         len += scnprintf(buf + len, PATH_MAX-len, "xpc %llu %llu %llu\n",
  80                         xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
  81         len += scnprintf(buf + len, PATH_MAX-len, "defer_relog %llu\n",
  82                         defer_relog);
  83         len += scnprintf(buf + len, PATH_MAX-len, "debug %u\n",
  84 #if defined(DEBUG)
  85                 1);
  86 #else
  87                 0);
  88 #endif
  89
  90         return len;
  91 }
  92
  93 void xfs_stats_clearall(struct xfsstats __percpu *stats)
  94 {
  95         int             c;
  96         uint32_t        vn_active;
  97
  98         xfs_notice(NULL, "Clearing xfsstats");
  99         for_each_possible_cpu(c) {
 100                 preempt_disable();
 101                 /* save vn_active, it's a universal truth! */
 102                 vn_active = per_cpu_ptr(stats, c)->s.vn_active;
 103                 memset(per_cpu_ptr(stats, c), 0, sizeof(*stats));
 104                 per_cpu_ptr(stats, c)->s.vn_active = vn_active;
 105                 preempt_enable();
 106         }
 107 }
 108
 109 #ifdef CONFIG_PROC_FS
 110 /* legacy quota interfaces */
 111 #ifdef CONFIG_XFS_QUOTA
 112
 113 #define XFSSTAT_START_XQMSTAT xfsstats_offset(xs_qm_dqreclaims)
 114 #define XFSSTAT_END_XQMSTAT xfsstats_offset(xs_qm_dquot)
 115
 116 static int xqm_proc_show(struct seq_file *m, void *v)
 117 {
 118         /* maximum; incore; ratio free to inuse; freelist */
 119         seq_printf(m, "%d\t%d\t%d\t%u\n",
 120                    0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
 121                    0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
 122         return 0;
 123 }
 124
 125 /* legacy quota stats interface no 2 */
 126 static int xqmstat_proc_show(struct seq_file *m, void *v)
 127 {
 128         int j;
 129
 130         seq_puts(m, "qm");
 131         for (j = XFSSTAT_START_XQMSTAT; j < XFSSTAT_END_XQMSTAT; j++)
 132                 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
 133         seq_putc(m, '\n');
 134         return 0;
 135 }
 136 #endif /* CONFIG_XFS_QUOTA */
 137
 138 int
 139 xfs_init_procfs(void)
 140 {
 141         if (!proc_mkdir("fs/xfs", NULL))
 142                 return -ENOMEM;
 143
 144         if (!proc_symlink("fs/xfs/stat", NULL,
 145                           "/sys/fs/xfs/stats/stats"))
 146                 goto out;
 147
 148 #ifdef CONFIG_XFS_QUOTA
 149         if (!proc_create_single("fs/xfs/xqmstat", 0, NULL, xqmstat_proc_show))
 150                 goto out;
 151         if (!proc_create_single("fs/xfs/xqm", 0, NULL, xqm_proc_show))
 152                 goto out;
 153 #endif
 154         return 0;
 155
 156 out:
 157         remove_proc_subtree("fs/xfs", NULL);
 158         return -ENOMEM;
 159 }
 160
 161 void
 162 xfs_cleanup_procfs(void)
 163 {
 164         remove_proc_subtree("fs/xfs", NULL);
 165 }
 166 #endif /* CONFIG_PROC_FS */