include/linux/coda_proc.h

   1 /*
   2  * coda_statis.h
   3  *
   4  * CODA operation statistics
   5  *
   6  * (c) March, 1998
   7  * by Michihiro Kuramochi, Zhenyu Xia and Zhanyong Wan
   8  * zhanyong.wan@yale.edu
   9  *
  10  */
  11
  12 #ifndef _CODA_PROC_H
  13 #define _CODA_PROC_H
  14
  15 void coda_sysctl_init(void);
  16 void coda_sysctl_clean(void);
  17 void coda_upcall_stats(int opcode, unsigned long jiffies);
  18
  19 #include <linux/sysctl.h>
  20 #include <linux/coda_fs_i.h>
  21 #include <linux/coda.h>
  22
  23 /* these four files are presented to show the result of the statistics:
  24  *
  25  *      /proc/fs/coda/vfs_stats
  26  *                    upcall_stats
  27  *                    permission_stats
  28  *                    cache_inv_stats
  29  *
  30  * these four files are presented to reset the statistics to 0:
  31  *
  32  *      /proc/sys/coda/vfs_stats
  33  *                     upcall_stats
  34  *                     permission_stats
  35  *                     cache_inv_stats
  36  */
  37
  38 /* VFS operation statistics */
  39 struct coda_vfs_stats
  40 {
  41         /* file operations */
  42         int open;
  43         int release;
  44         int fsync;
  45
  46         /* dir operations */
  47         int readdir;
  48
  49         /* inode operations */
  50         int create;
  51         int lookup;
  52         int link;
  53         int unlink;
  54         int symlink;
  55         int mkdir;
  56         int rmdir;
  57         int rename;
  58         int permission;
  59
  60         /* symlink operatoins*/
  61         int follow_link;
  62         int readlink;
  63 };
  64
  65 struct coda_upcall_stats_entry
  66 {
  67   int count;
  68   unsigned long time_sum;
  69   unsigned long time_squared_sum;
  70 };
  71
  72
  73
  74 /* cache hits for permissions statistics */
  75 struct coda_permission_stats
  76 {
  77         int count;
  78         int hit_count;
  79 };
  80
  81 /* cache invalidation statistics */
  82 struct coda_cache_inv_stats
  83 {
  84         int flush;
  85         int purge_user;
  86         int zap_dir;
  87         int zap_file;
  88         int zap_vnode;
  89         int purge_fid;
  90         int replace;
  91 };
  92
  93 /* these global variables hold the actual statistics data */
  94 extern struct coda_vfs_stats            coda_vfs_stat;
  95 extern struct coda_permission_stats     coda_permission_stat;
  96 extern struct coda_cache_inv_stats      coda_cache_inv_stat;
  97 extern int                              coda_upcall_timestamping;
  98
  99 /* reset statistics to 0 */
 100 void reset_coda_vfs_stats( void );
 101 void reset_coda_upcall_stats( void );
 102 void reset_coda_permission_stats( void );
 103 void reset_coda_cache_inv_stats( void );
 104
 105 /* some utitlities to make it easier for you to do statistics for time */
 106 void do_time_stats( struct coda_upcall_stats_entry * pentry,
 107                     unsigned long jiffy );
 108 /*
 109 double get_time_average( const struct coda_upcall_stats_entry * pentry );
 110 double get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
 111 */
 112 unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry );
 113 unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
 114
 115 /* like coda_dointvec, these functions are to be registered in the ctl_table
 116  * data structure for /proc/sys/... files
 117  */
 118 int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
 119                              void * buffer, size_t * lenp );
 120 int do_reset_coda_upcall_stats( ctl_table * table, int write,
 121                                 struct file * filp, void * buffer,
 122                                 size_t * lenp );
 123 int do_reset_coda_permission_stats( ctl_table * table, int write,
 124                                     struct file * filp, void * buffer,
 125                                     size_t * lenp );
 126 int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
 127                                    struct file * filp, void * buffer,
 128                                    size_t * lenp );
 129
 130 /* these functions are called to form the content of /proc/fs/coda/... files */
 131 int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
 132                              int length);
 133 int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
 134                                 int length);
 135 int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
 136                                     int length);
 137 int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
 138                                    int length);
 139
 140
 141 #endif /* _CODA_PROC_H */