aboutsummaryrefslogtreecommitdiffstats
path: root/fs/coda/sysctl.c
blob: 1c82e9a7d7c8a799698e404e1b50b31031ac3021 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
/*
 * Sysctl operations for Coda filesystem
 * Original version: (C) 1996 P. Braam and M. Callahan
 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
 * 
 * Carnegie Mellon encourages users to contribute improvements to
 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
 * 
 * CODA operation statistics
 * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
 *
 */

#include <linux/time.h>
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <linux/utsname.h>
#include <linux/module.h>

#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>
#include <linux/coda_cache.h>
#include <linux/coda_proc.h>

static struct ctl_table_header *fs_table_header;

#define FS_CODA         1       /* Coda file system */

#define CODA_TIMEOUT    3       /* timeout on upcalls to become intrble */
#define CODA_HARD       5       /* mount type "hard" or "soft" */
#define CODA_VFS 	 6       /* vfs statistics */
#define CODA_CACHE_INV 	 9       /* cache invalidation statistics */
#define CODA_FAKE_STATFS 10	 /* don't query venus for actual cache usage */

struct coda_vfs_stats		coda_vfs_stat;
static struct coda_cache_inv_stats	coda_cache_inv_stat;

static void reset_coda_vfs_stats( void )
{
	memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
}

static void reset_coda_cache_inv_stats( void )
{
	memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
}

static int do_reset_coda_vfs_stats( ctl_table * table, int write,
				    struct file * filp, void __user * buffer,
				    size_t * lenp, loff_t * ppos )
{
	if ( write ) {
		reset_coda_vfs_stats();

		*ppos += *lenp;
	} else {
		*lenp = 0;
	}

	return 0;
}

static int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
					  struct file * filp,
					  void __user * buffer,
					  size_t * lenp, loff_t * ppos )
{
	if ( write ) {
		reset_coda_cache_inv_stats();

		*ppos += *lenp;
	} else {
		*lenp = 0;
	}
  
	return 0;
}

static int coda_vfs_stats_get_info( char * buffer, char ** start,
				    off_t offset, int length)
{
	int len=0;
	off_t begin;
	struct coda_vfs_stats * ps = & coda_vfs_stat;
  
  /* this works as long as we are below 1024 characters! */
	len += sprintf( buffer,
			"Coda VFS statistics\n"
			"===================\n\n"
			"File Operations:\n"
			"\topen\t\t%9d\n"
			"\tflush\t\t%9d\n"
			"\trelease\t\t%9d\n"
			"\tfsync\t\t%9d\n\n"
			"Dir Operations:\n"
			"\treaddir\t\t%9d\n\n"
			"Inode Operations\n"
			"\tcreate\t\t%9d\n"
			"\tlookup\t\t%9d\n"
			"\tlink\t\t%9d\n"
			"\tunlink\t\t%9d\n"
			"\tsymlink\t\t%9d\n"
			"\tmkdir\t\t%9d\n"
			"\trmdir\t\t%9d\n"
			"\trename\t\t%9d\n"
			"\tpermission\t%9d\n",

			/* file operations */
			ps->open,
			ps->flush,
			ps->release,
			ps->fsync,

			/* dir operations */
			ps->readdir,
		  
			/* inode operations */
			ps->create,
			ps->lookup,
			ps->link,
			ps->unlink,
			ps->symlink,
			ps->mkdir,
			ps->rmdir,
			ps->rename,
			ps->permission); 

	begin = offset;
	*start = buffer + begin;
	len -= begin;

	if ( len > length )
		len = length;
	if ( len < 0 )
		len = 0;

	return len;
}

static int coda_cache_inv_stats_get_info( char * buffer, char ** start,
					  off_t offset, int length)
{
	int len=0;
	off_t begin;
	struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
  
	/* this works as long as we are below 1024 characters! */
	len += sprintf( buffer,
			"Coda cache invalidation statistics\n"
			"==================================\n\n"
			"flush\t\t%9d\n"
			"purge user\t%9d\n"
			"zap_dir\t\t%9d\n"
			"zap_file\t%9d\n"
			"zap_vnode\t%9d\n"
			"purge_fid\t%9d\n"
			"replace\t\t%9d\n",
			ps->flush,
			ps->purge_user,
			ps->zap_dir,
			ps->zap_file,
			ps->zap_vnode,
			ps->purge_fid,
			ps->replace );
  
	begin = offset;
	*start = buffer + begin;
	len -= begin;

	if ( len > length )
		len = length;
	if ( len < 0 )
		len = 0;

	return len;
}

static ctl_table coda_table[] = {
 	{CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &proc_dointvec},
 	{CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &proc_dointvec},
 	{CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
 	{CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
 	{CODA_FAKE_STATFS, "fake_statfs", &coda_fake_statfs, sizeof(int), 0600, NULL, &proc_dointvec},
	{ 0 }
};

static ctl_table fs_table[] = {
       {FS_CODA, "coda",    NULL, 0, 0555, coda_table},
       {0}
};


#ifdef CONFIG_PROC_FS

/*
 target directory structure:
   /proc/fs  (see linux/fs/proc/root.c)
   /proc/fs/coda
   /proc/fs/coda/{vfs_stats,

*/

static struct proc_dir_entry* proc_fs_coda;

#endif

#define coda_proc_create(name,get_info) \
	create_proc_info_entry(name, 0, proc_fs_coda, get_info)

void coda_sysctl_init(void)
{
	reset_coda_vfs_stats();
	reset_coda_cache_inv_stats();

#ifdef CONFIG_PROC_FS
	proc_fs_coda = proc_mkdir("coda", proc_root_fs);
	if (proc_fs_coda) {
		proc_fs_coda->owner = THIS_MODULE;
		coda_proc_create("vfs_stats", coda_vfs_stats_get_info);
		coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info);
	}
#endif

#ifdef CONFIG_SYSCTL
	if ( !fs_table_header )
		fs_table_header = register_sysctl_table(fs_table, 0);
#endif 
}

void coda_sysctl_clean(void) 
{

#ifdef CONFIG_SYSCTL
	if ( fs_table_header ) {
		unregister_sysctl_table(fs_table_header);
		fs_table_header = NULL;
	}
#endif

#ifdef CONFIG_PROC_FS
        remove_proc_entry("cache_inv_stats", proc_fs_coda);
        remove_proc_entry("vfs_stats", proc_fs_coda);
	remove_proc_entry("coda", proc_root_fs);
#endif 
}