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",       XFSSTAT_END_EXTENT_ALLOC        },
  33                 { "abt",                XFSSTAT_END_ALLOC_BTREE         },
  34                 { "blk_map",            XFSSTAT_END_BLOCK_MAPPING       },
  35                 { "bmbt",               XFSSTAT_END_BLOCK_MAP_BTREE     },
  36                 { "dir",                XFSSTAT_END_DIRECTORY_OPS       },
  37                 { "trans",              XFSSTAT_END_TRANSACTIONS        },
  38                 { "ig",                 XFSSTAT_END_INODE_OPS           },
  39                 { "log",                XFSSTAT_END_LOG_OPS             },
  40                 { "push_ail",           XFSSTAT_END_TAIL_PUSHING        },
  41                 { "xstrat",             XFSSTAT_END_WRITE_CONVERT       },
  42                 { "rw",                 XFSSTAT_END_READ_WRITE_OPS      },
  43                 { "attr",               XFSSTAT_END_ATTRIBUTE_OPS       },
  44                 { "icluster",           XFSSTAT_END_INODE_CLUSTER       },
  45                 { "vnodes",             XFSSTAT_END_VNODE_OPS           },
  46                 { "buf",                XFSSTAT_END_BUF                 },
  47                 { "abtb2",              XFSSTAT_END_ABTB_V2             },
  48                 { "abtc2",              XFSSTAT_END_ABTC_V2             },
  49                 { "bmbt2",              XFSSTAT_END_BMBT_V2             },
  50                 { "ibt2",               XFSSTAT_END_IBT_V2              },
  51                 { "fibt2",              XFSSTAT_END_FIBT_V2             },
  52                 { "rmapbt",             XFSSTAT_END_RMAP_V2             },
  53                 { "refcntbt",           XFSSTAT_END_REFCOUNT            },
  54                 /* we print both series of quota information together */
  55                 { "qm",                 XFSSTAT_END_QM                  },
  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 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, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT),
 112                    0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1));
 113         return 0;
 114 }
 115
 116 /* legacy quota stats interface no 2 */
 117 static int xqmstat_proc_show(struct seq_file *m, void *v)
 118 {
 119         int j;
 120
 121         seq_printf(m, "qm");
 122         for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
 123                 seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
 124         seq_putc(m, '\n');
 125         return 0;
 126 }
 127 #endif /* CONFIG_XFS_QUOTA */
 128
 129 int
 130 xfs_init_procfs(void)
 131 {
 132         if (!proc_mkdir("fs/xfs", NULL))
 133                 return -ENOMEM;
 134
 135         if (!proc_symlink("fs/xfs/stat", NULL,
 136                           "/sys/fs/xfs/stats/stats"))
 137                 goto out;
 138
 139 #ifdef CONFIG_XFS_QUOTA
 140         if (!proc_create_single("fs/xfs/xqmstat", 0, NULL, xqmstat_proc_show))
 141                 goto out;
 142         if (!proc_create_single("fs/xfs/xqm", 0, NULL, xqm_proc_show))
 143                 goto out;
 144 #endif
 145         return 0;
 146
 147 out:
 148         remove_proc_subtree("fs/xfs", NULL);
 149         return -ENOMEM;
 150 }
 151
 152 void
 153 xfs_cleanup_procfs(void)
 154 {
 155         remove_proc_subtree("fs/xfs", NULL);
 156 }
 157 #endif /* CONFIG_PROC_FS */