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/*
* coda_statis.h
*
* CODA operation statistics
*
* (c) March, 1998
* by Michihiro Kuramochi, Zhenyu Xia and Zhanyong Wan
* zhanyong.wan@yale.edu
*
*/
#ifndef _CODA_PROC_H
#define _CODA_PROC_H
void coda_sysctl_init(void);
void coda_sysctl_clean(void);
void coda_upcall_stats(int opcode, unsigned long jiffies);
#include <linux/sysctl.h>
#include <linux/coda_fs_i.h>
#include <linux/coda.h>
/* these four files are presented to show the result of the statistics:
*
* /proc/fs/coda/vfs_stats
* upcall_stats
* permission_stats
* cache_inv_stats
*
* these four files are presented to reset the statistics to 0:
*
* /proc/sys/coda/vfs_stats
* upcall_stats
* permission_stats
* cache_inv_stats
*/
/* VFS operation statistics */
struct coda_vfs_stats
{
/* file operations */
int open;
int flush;
int release;
int fsync;
/* dir operations */
int readdir;
/* inode operations */
int create;
int lookup;
int link;
int unlink;
int symlink;
int mkdir;
int rmdir;
int rename;
int permission;
/* symlink operatoins*/
int follow_link;
int readlink;
};
struct coda_upcall_stats_entry
{
int count;
unsigned long time_sum;
unsigned long time_squared_sum;
};
/* cache hits for permissions statistics */
struct coda_permission_stats
{
int count;
int hit_count;
};
/* cache invalidation statistics */
struct coda_cache_inv_stats
{
int flush;
int purge_user;
int zap_dir;
int zap_file;
int zap_vnode;
int purge_fid;
int replace;
};
/* these global variables hold the actual statistics data */
extern struct coda_vfs_stats coda_vfs_stat;
extern struct coda_permission_stats coda_permission_stat;
extern struct coda_cache_inv_stats coda_cache_inv_stat;
extern int coda_upcall_timestamping;
/* reset statistics to 0 */
void reset_coda_vfs_stats( void );
void reset_coda_upcall_stats( void );
void reset_coda_permission_stats( void );
void reset_coda_cache_inv_stats( void );
/* some utitlities to make it easier for you to do statistics for time */
void do_time_stats( struct coda_upcall_stats_entry * pentry,
unsigned long jiffy );
/*
double get_time_average( const struct coda_upcall_stats_entry * pentry );
double get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
*/
unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry );
unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
/* like coda_dointvec, these functions are to be registered in the ctl_table
* data structure for /proc/sys/... files
*/
int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
void * buffer, size_t * lenp );
int do_reset_coda_upcall_stats( ctl_table * table, int write,
struct file * filp, void * buffer,
size_t * lenp );
int do_reset_coda_permission_stats( ctl_table * table, int write,
struct file * filp, void * buffer,
size_t * lenp );
int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
struct file * filp, void * buffer,
size_t * lenp );
/* these functions are called to form the content of /proc/fs/coda/... files */
int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
int length);
int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
int length);
int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
int length);
int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
int length);
#endif /* _CODA_PROC_H */
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