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
counter_val(struct xfsstats __percpu * stats,int idx)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
xfs_stats_format(struct xfsstats __percpu * stats,char * buf)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
xfs_stats_clearall(struct xfsstats __percpu * stats)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
xqm_proc_show(struct seq_file * m,void * v)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 */
xqmstat_proc_show(struct seq_file * m,void * v)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_REFCOUNT; 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
xfs_init_procfs(void)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
xfs_cleanup_procfs(void)153 xfs_cleanup_procfs(void)
154 {
155 remove_proc_subtree("fs/xfs", NULL);
156 }
157 #endif /* CONFIG_PROC_FS */
158