Subversion Repositories shark

/*
 * 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);

#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
 *                    cache_inv_stats
 *
 * these four files are presented to reset the statistics to 0:
 *
 *      /proc/sys/coda/vfs_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;
};

/* 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_cache_inv_stats      coda_cache_inv_stat;

/* reset statistics to 0 */
void reset_coda_vfs_stats( void );
void reset_coda_cache_inv_stats( void );

/* 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_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_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
                                   int length);


#endif /* _CODA_PROC_H */