xfs: consolidate sysfs ops
[deliverable/linux.git] / fs / xfs / xfs_stats.c
CommitLineData
1da177e4 1/*
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2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
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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
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LT
7 * published by the Free Software Foundation.
8 *
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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.
1da177e4 13 *
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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
1da177e4 17 */
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LT
18#include "xfs.h"
19#include <linux/proc_fs.h>
20
21DEFINE_PER_CPU(struct xfsstats, xfsstats);
22
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23static int counter_val(int idx)
24{
25 int val = 0, cpu;
26
27 for_each_possible_cpu(cpu)
28 val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx));
29 return val;
30}
31
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BD
32int xfs_stats_format(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 /* we print both series of quota information together */
65 { "qm", XFSSTAT_END_QM },
66 };
67
68 /* Loop over all stats groups */
69
70 for (i = j = 0; i < ARRAY_SIZE(xstats); i++) {
71 len += snprintf(buf + len, PATH_MAX - len, "%s",
72 xstats[i].desc);
73 /* inner loop does each group */
74 for (; j < xstats[i].endpoint; j++)
75 len += snprintf(buf + len, PATH_MAX - len, " %u",
76 counter_val(j));
77 len += snprintf(buf + len, PATH_MAX - len, "\n");
78 }
79 /* extra precision counters */
80 for_each_possible_cpu(i) {
81 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
82 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
83 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
84 }
85
86 len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n",
87 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
88 len += snprintf(buf + len, PATH_MAX-len, "debug %u\n",
89#if defined(DEBUG)
90 1);
91#else
92 0);
93#endif
94
95 return len;
96}
97
98void xfs_stats_clearall(void)
99{
100 int c;
101 __uint32_t vn_active;
102
103 xfs_notice(NULL, "Clearing xfsstats");
104 for_each_possible_cpu(c) {
105 preempt_disable();
106 /* save vn_active, it's a universal truth! */
107 vn_active = per_cpu(xfsstats, c).vn_active;
108 memset(&per_cpu(xfsstats, c), 0, sizeof(struct xfsstats));
109 per_cpu(xfsstats, c).vn_active = vn_active;
110 preempt_enable();
111 }
112}
113
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CH
114/* legacy quota interfaces */
115#ifdef CONFIG_XFS_QUOTA
116static 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,
121 counter_val(XFSSTAT_END_XQMSTAT),
122 0,
123 counter_val(XFSSTAT_END_XQMSTAT + 1));
124 return 0;
125}
126
127static int xqm_proc_open(struct inode *inode, struct file *file)
128{
129 return single_open(file, xqm_proc_show, NULL);
130}
131
132static const struct file_operations xqm_proc_fops = {
133 .owner = THIS_MODULE,
134 .open = xqm_proc_open,
135 .read = seq_read,
136 .llseek = seq_lseek,
137 .release = single_release,
138};
139
140/* legacy quota stats interface no 2 */
141static int xqmstat_proc_show(struct seq_file *m, void *v)
142{
143 int j;
144
145 seq_printf(m, "qm");
146 for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
147 seq_printf(m, " %u", counter_val(j));
148 seq_putc(m, '\n');
149 return 0;
150}
151
152static int xqmstat_proc_open(struct inode *inode, struct file *file)
153{
154 return single_open(file, xqmstat_proc_show, NULL);
155}
156
157static const struct file_operations xqmstat_proc_fops = {
158 .owner = THIS_MODULE,
159 .open = xqmstat_proc_open,
160 .read = seq_read,
161 .llseek = seq_lseek,
162 .release = single_release,
163};
164#endif /* CONFIG_XFS_QUOTA */
165
9f8868ff 166int
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167xfs_init_procfs(void)
168{
169 if (!proc_mkdir("fs/xfs", NULL))
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CH
170 goto out;
171
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BD
172 if (!proc_symlink("fs/xfs/stat", NULL,
173 "/sys/fs/xfs/stats/stats"))
48776fd2 174 goto out_remove_xfs_dir;
32f0ea05 175
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CH
176#ifdef CONFIG_XFS_QUOTA
177 if (!proc_create("fs/xfs/xqmstat", 0, NULL,
178 &xqmstat_proc_fops))
179 goto out_remove_stat_file;
180 if (!proc_create("fs/xfs/xqm", 0, NULL,
181 &xqm_proc_fops))
182 goto out_remove_xqmstat_file;
183#endif
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CH
184 return 0;
185
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186#ifdef CONFIG_XFS_QUOTA
187 out_remove_xqmstat_file:
188 remove_proc_entry("fs/xfs/xqmstat", NULL);
189 out_remove_stat_file:
190 remove_proc_entry("fs/xfs/stat", NULL);
191#endif
192 out_remove_xfs_dir:
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CH
193 remove_proc_entry("fs/xfs", NULL);
194 out:
195 return -ENOMEM;
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196}
197
198void
199xfs_cleanup_procfs(void)
200{
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201#ifdef CONFIG_XFS_QUOTA
202 remove_proc_entry("fs/xfs/xqm", NULL);
203 remove_proc_entry("fs/xfs/xqmstat", NULL);
204#endif
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LT
205 remove_proc_entry("fs/xfs/stat", NULL);
206 remove_proc_entry("fs/xfs", NULL);
207}
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