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 DEFINE_PER_CPU(struct xfsstats, xfsstats);
22
23 STATIC int
24 xfs_read_xfsstats(
25 char *buffer,
26 char **start,
27 off_t offset,
28 int count,
29 int *eof,
30 void *data)
31 {
32 int c, i, j, len, val;
33 __uint64_t xs_xstrat_bytes = 0;
34 __uint64_t xs_write_bytes = 0;
35 __uint64_t xs_read_bytes = 0;
36
37 static const struct xstats_entry {
38 char *desc;
39 int endpoint;
40 } xstats[] = {
41 { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC },
42 { "abt", XFSSTAT_END_ALLOC_BTREE },
43 { "blk_map", XFSSTAT_END_BLOCK_MAPPING },
44 { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE },
45 { "dir", XFSSTAT_END_DIRECTORY_OPS },
46 { "trans", XFSSTAT_END_TRANSACTIONS },
47 { "ig", XFSSTAT_END_INODE_OPS },
48 { "log", XFSSTAT_END_LOG_OPS },
49 { "push_ail", XFSSTAT_END_TAIL_PUSHING },
50 { "xstrat", XFSSTAT_END_WRITE_CONVERT },
51 { "rw", XFSSTAT_END_READ_WRITE_OPS },
52 { "attr", XFSSTAT_END_ATTRIBUTE_OPS },
53 { "icluster", XFSSTAT_END_INODE_CLUSTER },
54 { "vnodes", XFSSTAT_END_VNODE_OPS },
55 { "buf", XFSSTAT_END_BUF },
56 { "abtb2", XFSSTAT_END_ABTB_V2 },
57 { "abtc2", XFSSTAT_END_ABTC_V2 },
58 { "bmbt2", XFSSTAT_END_BMBT_V2 },
59 { "ibt2", XFSSTAT_END_IBT_V2 },
60 };
61
62 /* Loop over all stats groups */
63 for (i=j=len = 0; i < ARRAY_SIZE(xstats); i++) {
64 len += sprintf(buffer + len, "%s", xstats[i].desc);
65 /* inner loop does each group */
66 while (j < xstats[i].endpoint) {
67 val = 0;
68 /* sum over all cpus */
69 for_each_possible_cpu(c)
70 val += *(((__u32*)&per_cpu(xfsstats, c) + j));
71 len += sprintf(buffer + len, " %u", val);
72 j++;
73 }
74 buffer[len++] = '\n';
75 }
76 /* extra precision counters */
77 for_each_possible_cpu(i) {
78 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
79 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
80 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
81 }
82
83 len += sprintf(buffer + len, "xpc %Lu %Lu %Lu\n",
84 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
85 len += sprintf(buffer + len, "debug %u\n",
86 #if defined(DEBUG)
87 1);
88 #else
89 0);
90 #endif
91
92 if (offset >= len) {
93 *start = buffer;
94 *eof = 1;
95 return 0;
96 }
97 *start = buffer + offset;
98 if ((len -= offset) > count)
99 return count;
100 *eof = 1;
101
102 return len;
103 }
104
105 int
106 xfs_init_procfs(void)
107 {
108 if (!proc_mkdir("fs/xfs", NULL))
109 goto out;
110
111 if (!create_proc_read_entry("fs/xfs/stat", 0, NULL,
112 xfs_read_xfsstats, NULL))
113 goto out_remove_entry;
114 return 0;
115
116 out_remove_entry:
117 remove_proc_entry("fs/xfs", NULL);
118 out:
119 return -ENOMEM;
120 }
121
122 void
123 xfs_cleanup_procfs(void)
124 {
125 remove_proc_entry("fs/xfs/stat", NULL);
126 remove_proc_entry("fs/xfs", NULL);
127 }
128
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