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/time.h>
16 #include <linux/sysctl.h>
17 #include <linux/proc_fs.h>
18 #include <linux/slab.h>
19 #include <linux/stat.h>
20 #include <linux/ctype.h>
21 #include <linux/bitops.h>
22 #include <asm/uaccess.h>
23 #include <linux/utsname.h>
24 #include <linux/module.h>
26 #include <linux/coda.h>
27 #include <linux/coda_linux.h>
28 #include <linux/coda_fs_i.h>
29 #include <linux/coda_psdev.h>
30 #include <linux/coda_cache.h>
31 #include <linux/coda_proc.h>
33 static struct ctl_table_header *fs_table_header;
35 #define FS_CODA 1 /* Coda file system */
37 #define CODA_TIMEOUT 3 /* timeout on upcalls to become intrble */
38 #define CODA_HARD 5 /* mount type "hard" or "soft" */
39 #define CODA_VFS 6 /* vfs statistics */
40 #define CODA_CACHE_INV 9 /* cache invalidation statistics */
41 #define CODA_FAKE_STATFS 10 /* don't query venus for actual cache usage */
43 struct coda_vfs_stats coda_vfs_stat;
44 static struct coda_cache_inv_stats coda_cache_inv_stat;
46 static void reset_coda_vfs_stats( void )
48 memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
51 static void reset_coda_cache_inv_stats( void )
53 memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
56 static int do_reset_coda_vfs_stats( ctl_table * table, int write,
57 struct file * filp, void __user * buffer,
58 size_t * lenp, loff_t * ppos )
61 reset_coda_vfs_stats();
71 static int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
74 size_t * lenp, loff_t * ppos )
77 reset_coda_cache_inv_stats();
87 static int coda_vfs_stats_get_info( char * buffer, char ** start,
88 off_t offset, int length)
92 struct coda_vfs_stats * ps = & coda_vfs_stat;
94 /* this works as long as we are below 1024 characters! */
95 len += sprintf( buffer,
96 "Coda VFS statistics\n"
97 "===================\n\n"
104 "\treaddir\t\t%9d\n\n"
114 "\tpermission\t%9d\n",
116 /* file operations */
125 /* inode operations */
137 *start = buffer + begin;
148 static int coda_cache_inv_stats_get_info( char * buffer, char ** start,
149 off_t offset, int length)
153 struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
155 /* this works as long as we are below 1024 characters! */
156 len += sprintf( buffer,
157 "Coda cache invalidation statistics\n"
158 "==================================\n\n"
175 *start = buffer + begin;
186 static ctl_table coda_table[] = {
187 {CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &proc_dointvec},
188 {CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &proc_dointvec},
189 {CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
190 {CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
191 {CODA_FAKE_STATFS, "fake_statfs", &coda_fake_statfs, sizeof(int), 0600, NULL, &proc_dointvec},
195 static ctl_table fs_table[] = {
196 {FS_CODA, "coda", NULL, 0, 0555, coda_table},
201 #ifdef CONFIG_PROC_FS
204 target directory structure:
205 /proc/fs (see linux/fs/proc/root.c)
207 /proc/fs/coda/{vfs_stats,
211 static struct proc_dir_entry* proc_fs_coda;
215 #define coda_proc_create(name,get_info) \
216 create_proc_info_entry(name, 0, proc_fs_coda, get_info)
218 void coda_sysctl_init(void)
220 reset_coda_vfs_stats();
221 reset_coda_cache_inv_stats();
223 #ifdef CONFIG_PROC_FS
224 proc_fs_coda = proc_mkdir("coda", proc_root_fs);
226 proc_fs_coda->owner = THIS_MODULE;
227 coda_proc_create("vfs_stats", coda_vfs_stats_get_info);
228 coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info);
233 if ( !fs_table_header )
234 fs_table_header = register_sysctl_table(fs_table, 0);
238 void coda_sysctl_clean(void)
242 if ( fs_table_header ) {
243 unregister_sysctl_table(fs_table_header);
244 fs_table_header = NULL;
248 #ifdef CONFIG_PROC_FS
249 remove_proc_entry("cache_inv_stats", proc_fs_coda);
250 remove_proc_entry("vfs_stats", proc_fs_coda);
251 remove_proc_entry("coda", proc_root_fs);