Merge /spare/repo/linux-2.6/
[linux-2.6] / fs / xfs / linux-2.6 / xfs_stats.c
1 /*
2  * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of version 2 of the GNU General Public License as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it would be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11  *
12  * Further, this software is distributed without any warranty that it is
13  * free of the rightful claim of any third person regarding infringement
14  * or the like.  Any license provided herein, whether implied or
15  * otherwise, applies only to this software file.  Patent licenses, if
16  * any, provided herein do not apply to combinations of this program with
17  * other software, or any other product whatsoever.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, write the Free Software Foundation, Inc., 59
21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
22  *
23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24  * Mountain View, CA  94043, or:
25  *
26  * http://www.sgi.com
27  *
28  * For further information regarding this notice, see:
29  *
30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31  */
32
33 #include "xfs.h"
34 #include <linux/proc_fs.h>
35
36 DEFINE_PER_CPU(struct xfsstats, xfsstats);
37
38 STATIC int
39 xfs_read_xfsstats(
40         char            *buffer,
41         char            **start,
42         off_t           offset,
43         int             count,
44         int             *eof,
45         void            *data)
46 {
47         int             c, i, j, len, val;
48         __uint64_t      xs_xstrat_bytes = 0;
49         __uint64_t      xs_write_bytes = 0;
50         __uint64_t      xs_read_bytes = 0;
51
52         static struct xstats_entry {
53                 char    *desc;
54                 int     endpoint;
55         } xstats[] = {
56                 { "extent_alloc",       XFSSTAT_END_EXTENT_ALLOC        },
57                 { "abt",                XFSSTAT_END_ALLOC_BTREE         },
58                 { "blk_map",            XFSSTAT_END_BLOCK_MAPPING       },
59                 { "bmbt",               XFSSTAT_END_BLOCK_MAP_BTREE     },
60                 { "dir",                XFSSTAT_END_DIRECTORY_OPS       },
61                 { "trans",              XFSSTAT_END_TRANSACTIONS        },
62                 { "ig",                 XFSSTAT_END_INODE_OPS           },
63                 { "log",                XFSSTAT_END_LOG_OPS             },
64                 { "push_ail",           XFSSTAT_END_TAIL_PUSHING        },
65                 { "xstrat",             XFSSTAT_END_WRITE_CONVERT       },
66                 { "rw",                 XFSSTAT_END_READ_WRITE_OPS      },
67                 { "attr",               XFSSTAT_END_ATTRIBUTE_OPS       },
68                 { "icluster",           XFSSTAT_END_INODE_CLUSTER       },
69                 { "vnodes",             XFSSTAT_END_VNODE_OPS           },
70                 { "buf",                XFSSTAT_END_BUF                 },
71         };
72
73         /* Loop over all stats groups */
74         for (i=j=len = 0; i < sizeof(xstats)/sizeof(struct xstats_entry); i++) {
75                 len += sprintf(buffer + len, xstats[i].desc);
76                 /* inner loop does each group */
77                 while (j < xstats[i].endpoint) {
78                         val = 0;
79                         /* sum over all cpus */
80                         for (c = 0; c < NR_CPUS; c++) {
81                                 if (!cpu_possible(c)) continue;
82                                 val += *(((__u32*)&per_cpu(xfsstats, c) + j));
83                         }
84                         len += sprintf(buffer + len, " %u", val);
85                         j++;
86                 }
87                 buffer[len++] = '\n';
88         }
89         /* extra precision counters */
90         for (i = 0; i < NR_CPUS; i++) {
91                 if (!cpu_possible(i)) continue;
92                 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
93                 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
94                 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
95         }
96
97         len += sprintf(buffer + len, "xpc %Lu %Lu %Lu\n",
98                         xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
99         len += sprintf(buffer + len, "debug %u\n",
100 #if defined(DEBUG)
101                 1);
102 #else
103                 0);
104 #endif
105
106         if (offset >= len) {
107                 *start = buffer;
108                 *eof = 1;
109                 return 0;
110         }
111         *start = buffer + offset;
112         if ((len -= offset) > count)
113                 return count;
114         *eof = 1;
115
116         return len;
117 }
118
119 void
120 xfs_init_procfs(void)
121 {
122         if (!proc_mkdir("fs/xfs", NULL))
123                 return;
124         create_proc_read_entry("fs/xfs/stat", 0, NULL, xfs_read_xfsstats, NULL);
125 }
126
127 void
128 xfs_cleanup_procfs(void)
129 {
130         remove_proc_entry("fs/xfs/stat", NULL);
131         remove_proc_entry("fs/xfs", NULL);
132 }