Merge tag 'mips_fixes_5.2_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips...
[linux-2.6-microblaze.git] / 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 */