2 * Sysctl operations for Coda filesystem
3 * Original version: (C) 1996 P. Braam and M. Callahan
4 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
6 * Carnegie Mellon encourages users to contribute improvements to
7 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
9 * CODA operation statistics
10 * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
14 #include <linux/config.h>
15 #include <linux/time.h>
17 #include <linux/sysctl.h>
18 #include <linux/proc_fs.h>
19 #include <linux/slab.h>
20 #include <linux/stat.h>
21 #include <linux/ctype.h>
22 #include <asm/bitops.h>
23 #include <asm/uaccess.h>
24 #include <linux/utsname.h>
25 #include <linux/module.h>
27 #include <linux/coda.h>
28 #include <linux/coda_linux.h>
29 #include <linux/coda_fs_i.h>
30 #include <linux/coda_psdev.h>
31 #include <linux/coda_cache.h>
32 #include <linux/coda_proc.h>
34 static struct ctl_table_header
*fs_table_header
;
36 #define FS_CODA 1 /* Coda file system */
38 #define CODA_TIMEOUT 3 /* timeout on upcalls to become intrble */
39 #define CODA_HARD 5 /* mount type "hard" or "soft" */
40 #define CODA_VFS 6 /* vfs statistics */
41 #define CODA_CACHE_INV 9 /* cache invalidation statistics */
42 #define CODA_FAKE_STATFS 10 /* don't query venus for actual cache usage */
44 static ctl_table coda_table
[] = {
45 {CODA_TIMEOUT
, "timeout", &coda_timeout
, sizeof(int), 0644, NULL
, &proc_dointvec
},
46 {CODA_HARD
, "hard", &coda_hard
, sizeof(int), 0644, NULL
, &proc_dointvec
},
47 {CODA_VFS
, "vfs_stats", NULL
, 0, 0644, NULL
, &do_reset_coda_vfs_stats
},
48 {CODA_CACHE_INV
, "cache_inv_stats", NULL
, 0, 0644, NULL
, &do_reset_coda_cache_inv_stats
},
49 {CODA_FAKE_STATFS
, "fake_statfs", &coda_fake_statfs
, sizeof(int), 0600, NULL
, &proc_dointvec
},
53 static ctl_table fs_table
[] = {
54 {FS_CODA
, "coda", NULL
, 0, 0555, coda_table
},
58 struct coda_vfs_stats coda_vfs_stat
;
59 struct coda_cache_inv_stats coda_cache_inv_stat
;
61 void reset_coda_vfs_stats( void )
63 memset( &coda_vfs_stat
, 0, sizeof( coda_vfs_stat
) );
66 void reset_coda_cache_inv_stats( void )
68 memset( &coda_cache_inv_stat
, 0, sizeof( coda_cache_inv_stat
) );
71 int do_reset_coda_vfs_stats( ctl_table
* table
, int write
, struct file
* filp
,
72 void * buffer
, size_t * lenp
)
75 reset_coda_vfs_stats();
85 int do_reset_coda_cache_inv_stats( ctl_table
* table
, int write
,
86 struct file
* filp
, void * buffer
,
90 reset_coda_cache_inv_stats();
100 int coda_vfs_stats_get_info( char * buffer
, char ** start
, off_t offset
,
105 struct coda_vfs_stats
* ps
= & coda_vfs_stat
;
107 /* this works as long as we are below 1024 characters! */
108 len
+= sprintf( buffer
,
109 "Coda VFS statistics\n"
110 "===================\n\n"
117 "\treaddir\t\t%9d\n\n"
127 "\tpermission\t%9d\n",
129 /* file operations */
138 /* inode operations */
150 *start
= buffer
+ begin
;
161 int coda_cache_inv_stats_get_info( char * buffer
, char ** start
, off_t offset
,
166 struct coda_cache_inv_stats
* ps
= & coda_cache_inv_stat
;
168 /* this works as long as we are below 1024 characters! */
169 len
+= sprintf( buffer
,
170 "Coda cache invalidation statistics\n"
171 "==================================\n\n"
188 *start
= buffer
+ begin
;
200 #ifdef CONFIG_PROC_FS
203 target directory structure:
204 /proc/fs (see linux/fs/proc/root.c)
206 /proc/fs/coda/{vfs_stats,
210 struct proc_dir_entry
* proc_fs_coda
;
214 #define coda_proc_create(name,get_info) \
215 create_proc_info_entry(name, 0, proc_fs_coda, get_info)
217 void coda_sysctl_init()
219 reset_coda_vfs_stats();
220 reset_coda_cache_inv_stats();
222 #ifdef CONFIG_PROC_FS
223 proc_fs_coda
= proc_mkdir("coda", proc_root_fs
);
225 proc_fs_coda
->owner
= THIS_MODULE
;
226 coda_proc_create("vfs_stats", coda_vfs_stats_get_info
);
227 coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info
);
232 if ( !fs_table_header
)
233 fs_table_header
= register_sysctl_table(fs_table
, 0);
237 void coda_sysctl_clean()
241 if ( fs_table_header
) {
242 unregister_sysctl_table(fs_table_header
);
247 #ifdef CONFIG_PROC_FS
248 remove_proc_entry("cache_inv_stats", proc_fs_coda
);
249 remove_proc_entry("vfs_stats", proc_fs_coda
);
250 remove_proc_entry("coda", proc_root_fs
);