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 file_read;
  43         int file_write;
  44         int file_mmap;
  45         int open;
  46         int release;
  47         int fsync;
  48
  49         /* dir operations */
  50         int readdir;
  51
  52         /* inode operations */
  53         int create;
  54         int lookup;
  55         int link;
  56         int unlink;
  57         int symlink;
  58         int mkdir;
  59         int rmdir;
  60         int rename;
  61         int permission;
  62         int readpage;
  63
  64         /* symlink operatoins*/
  65         int follow_link;
  66         int readlink;
  67 };
  68
  69 struct coda_upcall_stats_entry
  70 {
  71   int count;
  72   unsigned long time_sum;
  73   unsigned long time_squared_sum;
  74 };
  75
  76
  77
  78 /* cache hits for permissions statistics */
  79 struct coda_permission_stats
  80 {
  81         int count;
  82         int hit_count;
  83 };
  84
  85 /* cache invalidation statistics */
  86 struct coda_cache_inv_stats
  87 {
  88         int flush;
  89         int purge_user;
  90         int zap_dir;
  91         int zap_file;
  92         int zap_vnode;
  93         int purge_fid;
  94         int replace;
  95 };
  96
  97 /* these global variables hold the actual statistics data */
  98 extern struct coda_vfs_stats            coda_vfs_stat;
  99 extern struct coda_permission_stats     coda_permission_stat;
 100 extern struct coda_cache_inv_stats      coda_cache_inv_stat;
 101
 102 /* reset statistics to 0 */
 103 void reset_coda_vfs_stats( void );
 104 void reset_coda_upcall_stats( void );
 105 void reset_coda_permission_stats( void );
 106 void reset_coda_cache_inv_stats( void );
 107
 108 /* some utitlities to make it easier for you to do statistics for time */
 109 void do_time_stats( struct coda_upcall_stats_entry * pentry,
 110                     unsigned long jiffy );
 111 /*
 112 double get_time_average( const struct coda_upcall_stats_entry * pentry );
 113 double get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
 114 */
 115 unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry );
 116 unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
 117
 118 /* like coda_dointvec, these functions are to be registered in the ctl_table
 119  * data structure for /proc/sys/... files
 120  */
 121 int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
 122                              void * buffer, size_t * lenp );
 123 int do_reset_coda_upcall_stats( ctl_table * table, int write,
 124                                 struct file * filp, void * buffer,
 125                                 size_t * lenp );
 126 int do_reset_coda_permission_stats( ctl_table * table, int write,
 127                                     struct file * filp, void * buffer,
 128                                     size_t * lenp );
 129 int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
 130                                    struct file * filp, void * buffer,
 131                                    size_t * lenp );
 132
 133 /* these functions are called to form the content of /proc/fs/coda/... files */
 134 int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
 135                              int length, int dummy );
 136 int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
 137                                 int length, int dummy );
 138 int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
 139                                     int length, int dummy );
 140 int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
 141                                    int length, int dummy );
 142
 143
 144 #endif /* _CODA_PROC_H */