/*
* 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/seq_file.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 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 proc_vfs_stats_show(struct seq_file *m, void *v)
{
struct coda_vfs_stats * ps = & coda_vfs_stat;
seq_printf(m,
"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);
return 0;
}
static int proc_cache_inv_stats_show(struct seq_file *m, void *v)
{
struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
seq_printf(m,
"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 );
return 0;
}
static int proc_vfs_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_vfs_stats_show, NULL);
}
static int proc_cache_inv_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_cache_inv_stats_show, NULL);
}
static const struct file_operations proc_vfs_stats_fops = {
.owner = THIS_MODULE,
.open = proc_vfs_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct file_operations proc_cache_inv_stats_fops = {
.owner = THIS_MODULE,
.open = proc_cache_inv_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static ctl_table coda_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "timeout",
.data = &coda_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "hard",
.data = &coda_hard,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "vfs_stats",
.data = NULL,
.maxlen = 0,
.mode = 0644,
.proc_handler = &do_reset_coda_vfs_stats
},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "cache_inv_stats",
.data = NULL,
.maxlen = 0,
.mode = 0644,
.proc_handler = &do_reset_coda_cache_inv_stats
},
{
.ctl_name = CTL_UNNUMBERED,
.procname = "fake_statfs",
.data = &coda_fake_statfs,
.maxlen = sizeof(int),
.mode = 0600,
.proc_handler = &proc_dointvec
},
{}
};
static ctl_table fs_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "coda",
.mode = 0555,
.child = coda_table
},
{}
};
#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
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) {
struct proc_dir_entry *pde;
proc_fs_coda->owner = THIS_MODULE;
pde = create_proc_entry("vfs_stats", 0, proc_fs_coda);
if (pde)
pde->proc_fops = &proc_vfs_stats_fops;
pde = create_proc_entry("cache_inv_stats", 0, proc_fs_coda);
if (pde)
pde->proc_fops = &proc_cache_inv_stats_fops;
}
#endif
#ifdef CONFIG_SYSCTL
if ( !fs_table_header )
fs_table_header = register_sysctl_table(fs_table);
#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
}
