Merge branch 'master'
[linux-2.6] / fs / xfs / quota / xfs_qm_stats.c
1 /*
2  * Copyright (c) 2000-2003 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 "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir.h"
27 #include "xfs_dir2.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_ialloc.h"
41 #include "xfs_itable.h"
42 #include "xfs_bmap.h"
43 #include "xfs_btree.h"
44 #include "xfs_rtalloc.h"
45 #include "xfs_error.h"
46 #include "xfs_rw.h"
47 #include "xfs_acl.h"
48 #include "xfs_cap.h"
49 #include "xfs_mac.h"
50 #include "xfs_attr.h"
51 #include "xfs_buf_item.h"
52 #include "xfs_qm.h"
53
54 struct xqmstats xqmstats;
55
56 STATIC int
57 xfs_qm_read_xfsquota(
58         char            *buffer,
59         char            **start,
60         off_t           offset,
61         int             count,
62         int             *eof,
63         void            *data)
64 {
65         int             len;
66
67         /* maximum; incore; ratio free to inuse; freelist */
68         len = sprintf(buffer, "%d\t%d\t%d\t%u\n",
69                         ndquot,
70                         xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
71                         xfs_Gqm? xfs_Gqm->qm_dqfree_ratio : 0,
72                         xfs_Gqm? xfs_Gqm->qm_dqfreelist.qh_nelems : 0);
73
74         if (offset >= len) {
75                 *start = buffer;
76                 *eof = 1;
77                 return 0;
78         }
79         *start = buffer + offset;
80         if ((len -= offset) > count)
81                 return count;
82         *eof = 1;
83
84         return len;
85 }
86
87 STATIC int
88 xfs_qm_read_stats(
89         char            *buffer,
90         char            **start,
91         off_t           offset,
92         int             count,
93         int             *eof,
94         void            *data)
95 {
96         int             len;
97
98         /* quota performance statistics */
99         len = sprintf(buffer, "qm %u %u %u %u %u %u %u %u\n",
100                         xqmstats.xs_qm_dqreclaims,
101                         xqmstats.xs_qm_dqreclaim_misses,
102                         xqmstats.xs_qm_dquot_dups,
103                         xqmstats.xs_qm_dqcachemisses,
104                         xqmstats.xs_qm_dqcachehits,
105                         xqmstats.xs_qm_dqwants,
106                         xqmstats.xs_qm_dqshake_reclaims,
107                         xqmstats.xs_qm_dqinact_reclaims);
108
109         if (offset >= len) {
110                 *start = buffer;
111                 *eof = 1;
112                 return 0;
113         }
114         *start = buffer + offset;
115         if ((len -= offset) > count)
116                 return count;
117         *eof = 1;
118
119         return len;
120 }
121
122 void
123 xfs_qm_init_procfs(void)
124 {
125         create_proc_read_entry("fs/xfs/xqmstat", 0, NULL, xfs_qm_read_stats, NULL);
126         create_proc_read_entry("fs/xfs/xqm", 0, NULL, xfs_qm_read_xfsquota, NULL);
127 }
128
129 void
130 xfs_qm_cleanup_procfs(void)
131 {
132         remove_proc_entry("fs/xfs/xqm", NULL);
133         remove_proc_entry("fs/xfs/xqmstat", NULL);
134 }