/*
* 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
}
