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1 | /* | |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #include "xfs.h" | |
19 | #include <linux/proc_fs.h> | |
20 | ||
21 | struct xstats xfsstats; | |
22 | ||
23 | static int counter_val(struct xfsstats __percpu *stats, int idx) | |
24 | { | |
25 | int val = 0, cpu; | |
26 | ||
27 | for_each_possible_cpu(cpu) | |
28 | val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); | |
29 | return val; | |
30 | } | |
31 | ||
32 | int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) | |
33 | { | |
34 | int i, j; | |
35 | int len = 0; | |
36 | uint64_t xs_xstrat_bytes = 0; | |
37 | uint64_t xs_write_bytes = 0; | |
38 | uint64_t xs_read_bytes = 0; | |
39 | ||
40 | static const struct xstats_entry { | |
41 | char *desc; | |
42 | int endpoint; | |
43 | } xstats[] = { | |
44 | { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC }, | |
45 | { "abt", XFSSTAT_END_ALLOC_BTREE }, | |
46 | { "blk_map", XFSSTAT_END_BLOCK_MAPPING }, | |
47 | { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE }, | |
48 | { "dir", XFSSTAT_END_DIRECTORY_OPS }, | |
49 | { "trans", XFSSTAT_END_TRANSACTIONS }, | |
50 | { "ig", XFSSTAT_END_INODE_OPS }, | |
51 | { "log", XFSSTAT_END_LOG_OPS }, | |
52 | { "push_ail", XFSSTAT_END_TAIL_PUSHING }, | |
53 | { "xstrat", XFSSTAT_END_WRITE_CONVERT }, | |
54 | { "rw", XFSSTAT_END_READ_WRITE_OPS }, | |
55 | { "attr", XFSSTAT_END_ATTRIBUTE_OPS }, | |
56 | { "icluster", XFSSTAT_END_INODE_CLUSTER }, | |
57 | { "vnodes", XFSSTAT_END_VNODE_OPS }, | |
58 | { "buf", XFSSTAT_END_BUF }, | |
59 | { "abtb2", XFSSTAT_END_ABTB_V2 }, | |
60 | { "abtc2", XFSSTAT_END_ABTC_V2 }, | |
61 | { "bmbt2", XFSSTAT_END_BMBT_V2 }, | |
62 | { "ibt2", XFSSTAT_END_IBT_V2 }, | |
63 | { "fibt2", XFSSTAT_END_FIBT_V2 }, | |
64 | { "rmapbt", XFSSTAT_END_RMAP_V2 }, | |
65 | { "refcntbt", XFSSTAT_END_REFCOUNT }, | |
66 | /* we print both series of quota information together */ | |
67 | { "qm", XFSSTAT_END_QM }, | |
68 | }; | |
69 | ||
70 | /* Loop over all stats groups */ | |
71 | ||
72 | for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { | |
73 | len += snprintf(buf + len, PATH_MAX - len, "%s", | |
74 | xstats[i].desc); | |
75 | /* inner loop does each group */ | |
76 | for (; j < xstats[i].endpoint; j++) | |
77 | len += snprintf(buf + len, PATH_MAX - len, " %u", | |
78 | counter_val(stats, j)); | |
79 | len += snprintf(buf + len, PATH_MAX - len, "\n"); | |
80 | } | |
81 | /* extra precision counters */ | |
82 | for_each_possible_cpu(i) { | |
83 | xs_xstrat_bytes += per_cpu_ptr(stats, i)->s.xs_xstrat_bytes; | |
84 | xs_write_bytes += per_cpu_ptr(stats, i)->s.xs_write_bytes; | |
85 | xs_read_bytes += per_cpu_ptr(stats, i)->s.xs_read_bytes; | |
86 | } | |
87 | ||
88 | len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", | |
89 | xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); | |
90 | len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", | |
91 | #if defined(DEBUG) | |
92 | 1); | |
93 | #else | |
94 | 0); | |
95 | #endif | |
96 | ||
97 | return len; | |
98 | } | |
99 | ||
100 | void xfs_stats_clearall(struct xfsstats __percpu *stats) | |
101 | { | |
102 | int c; | |
103 | uint32_t vn_active; | |
104 | ||
105 | xfs_notice(NULL, "Clearing xfsstats"); | |
106 | for_each_possible_cpu(c) { | |
107 | preempt_disable(); | |
108 | /* save vn_active, it's a universal truth! */ | |
109 | vn_active = per_cpu_ptr(stats, c)->s.vn_active; | |
110 | memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); | |
111 | per_cpu_ptr(stats, c)->s.vn_active = vn_active; | |
112 | preempt_enable(); | |
113 | } | |
114 | } | |
115 | ||
116 | /* legacy quota interfaces */ | |
117 | #ifdef CONFIG_XFS_QUOTA | |
118 | static int xqm_proc_show(struct seq_file *m, void *v) | |
119 | { | |
120 | /* maximum; incore; ratio free to inuse; freelist */ | |
121 | seq_printf(m, "%d\t%d\t%d\t%u\n", | |
122 | 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), | |
123 | 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int xqm_proc_open(struct inode *inode, struct file *file) | |
128 | { | |
129 | return single_open(file, xqm_proc_show, NULL); | |
130 | } | |
131 | ||
132 | static const struct file_operations xqm_proc_fops = { | |
133 | .open = xqm_proc_open, | |
134 | .read = seq_read, | |
135 | .llseek = seq_lseek, | |
136 | .release = single_release, | |
137 | }; | |
138 | ||
139 | /* legacy quota stats interface no 2 */ | |
140 | static int xqmstat_proc_show(struct seq_file *m, void *v) | |
141 | { | |
142 | int j; | |
143 | ||
144 | seq_printf(m, "qm"); | |
145 | for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++) | |
146 | seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); | |
147 | seq_putc(m, '\n'); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int xqmstat_proc_open(struct inode *inode, struct file *file) | |
152 | { | |
153 | return single_open(file, xqmstat_proc_show, NULL); | |
154 | } | |
155 | ||
156 | static const struct file_operations xqmstat_proc_fops = { | |
157 | .owner = THIS_MODULE, | |
158 | .open = xqmstat_proc_open, | |
159 | .read = seq_read, | |
160 | .llseek = seq_lseek, | |
161 | .release = single_release, | |
162 | }; | |
163 | #endif /* CONFIG_XFS_QUOTA */ | |
164 | ||
165 | #ifdef CONFIG_PROC_FS | |
166 | int | |
167 | xfs_init_procfs(void) | |
168 | { | |
169 | if (!proc_mkdir("fs/xfs", NULL)) | |
170 | return -ENOMEM; | |
171 | ||
172 | if (!proc_symlink("fs/xfs/stat", NULL, | |
173 | "/sys/fs/xfs/stats/stats")) | |
174 | goto out; | |
175 | ||
176 | #ifdef CONFIG_XFS_QUOTA | |
177 | if (!proc_create("fs/xfs/xqmstat", 0, NULL, | |
178 | &xqmstat_proc_fops)) | |
179 | goto out; | |
180 | if (!proc_create("fs/xfs/xqm", 0, NULL, | |
181 | &xqm_proc_fops)) | |
182 | goto out; | |
183 | #endif | |
184 | return 0; | |
185 | ||
186 | out: | |
187 | remove_proc_subtree("fs/xfs", NULL); | |
188 | return -ENOMEM; | |
189 | } | |
190 | ||
191 | void | |
192 | xfs_cleanup_procfs(void) | |
193 | { | |
194 | remove_proc_subtree("fs/xfs", NULL); | |
195 | } | |
196 | #endif /* CONFIG_PROC_FS */ |