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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_dir2.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_quota.h"
30 #include "xfs_mount.h"
31 #include "xfs_bmap_btree.h"
32 #include "xfs_alloc_btree.h"
33 #include "xfs_ialloc_btree.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_attr_sf.h"
36 #include "xfs_dinode.h"
37 #include "xfs_inode.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_itable.h"
40 #include "xfs_bmap.h"
41 #include "xfs_btree.h"
42 #include "xfs_rtalloc.h"
43 #include "xfs_error.h"
44 #include "xfs_rw.h"
45 #include "xfs_acl.h"
46 #include "xfs_attr.h"
47 #include "xfs_buf_item.h"
48 #include "xfs_qm.h"
49 
50 struct xqmstats xqmstats;
51 
52 STATIC int
xfs_qm_read_xfsquota(char * buffer,char ** start,off_t offset,int count,int * eof,void * data)53 xfs_qm_read_xfsquota(
54 	char		*buffer,
55 	char		**start,
56 	off_t		offset,
57 	int		count,
58 	int		*eof,
59 	void		*data)
60 {
61 	int		len;
62 
63 	/* maximum; incore; ratio free to inuse; freelist */
64 	len = sprintf(buffer, "%d\t%d\t%d\t%u\n",
65 			ndquot,
66 			xfs_Gqm? atomic_read(&xfs_Gqm->qm_totaldquots) : 0,
67 			xfs_Gqm? xfs_Gqm->qm_dqfree_ratio : 0,
68 			xfs_Gqm? xfs_Gqm->qm_dqfreelist.qh_nelems : 0);
69 
70 	if (offset >= len) {
71 		*start = buffer;
72 		*eof = 1;
73 		return 0;
74 	}
75 	*start = buffer + offset;
76 	if ((len -= offset) > count)
77 		return count;
78 	*eof = 1;
79 
80 	return len;
81 }
82 
83 STATIC int
xfs_qm_read_stats(char * buffer,char ** start,off_t offset,int count,int * eof,void * data)84 xfs_qm_read_stats(
85 	char		*buffer,
86 	char		**start,
87 	off_t		offset,
88 	int		count,
89 	int		*eof,
90 	void		*data)
91 {
92 	int		len;
93 
94 	/* quota performance statistics */
95 	len = sprintf(buffer, "qm %u %u %u %u %u %u %u %u\n",
96 			xqmstats.xs_qm_dqreclaims,
97 			xqmstats.xs_qm_dqreclaim_misses,
98 			xqmstats.xs_qm_dquot_dups,
99 			xqmstats.xs_qm_dqcachemisses,
100 			xqmstats.xs_qm_dqcachehits,
101 			xqmstats.xs_qm_dqwants,
102 			xqmstats.xs_qm_dqshake_reclaims,
103 			xqmstats.xs_qm_dqinact_reclaims);
104 
105 	if (offset >= len) {
106 		*start = buffer;
107 		*eof = 1;
108 		return 0;
109 	}
110 	*start = buffer + offset;
111 	if ((len -= offset) > count)
112 		return count;
113 	*eof = 1;
114 
115 	return len;
116 }
117 
118 void
xfs_qm_init_procfs(void)119 xfs_qm_init_procfs(void)
120 {
121 	create_proc_read_entry("fs/xfs/xqmstat", 0, NULL, xfs_qm_read_stats, NULL);
122 	create_proc_read_entry("fs/xfs/xqm", 0, NULL, xfs_qm_read_xfsquota, NULL);
123 }
124 
125 void
xfs_qm_cleanup_procfs(void)126 xfs_qm_cleanup_procfs(void)
127 {
128 	remove_proc_entry("fs/xfs/xqm", NULL);
129 	remove_proc_entry("fs/xfs/xqmstat", NULL);
130 }
131