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
  18 #include <linux/sysctl.h>
  19 #include <linux/coda_fs_i.h>
  20 #include <linux/coda.h>
  21
  22 /* these four files are presented to show the result of the statistics:
  23  *
  24  *      /proc/fs/coda/vfs_stats
  25  *                    cache_inv_stats
  26  *
  27  * these four files are presented to reset the statistics to 0:
  28  *
  29  *      /proc/sys/coda/vfs_stats
  30  *                     cache_inv_stats
  31  */
  32
  33 /* VFS operation statistics */
  34 struct coda_vfs_stats
  35 {
  36         /* file operations */
  37         int open;
  38         int flush;
  39         int release;
  40         int fsync;
  41
  42         /* dir operations */
  43         int readdir;
  44
  45         /* inode operations */
  46         int create;
  47         int lookup;
  48         int link;
  49         int unlink;
  50         int symlink;
  51         int mkdir;
  52         int rmdir;
  53         int rename;
  54         int permission;
  55
  56         /* symlink operatoins*/
  57         int follow_link;
  58         int readlink;
  59 };
  60
  61 /* cache invalidation statistics */
  62 struct coda_cache_inv_stats
  63 {
  64         int flush;
  65         int purge_user;
  66         int zap_dir;
  67         int zap_file;
  68         int zap_vnode;
  69         int purge_fid;
  70         int replace;
  71 };
  72
  73 /* these global variables hold the actual statistics data */
  74 extern struct coda_vfs_stats            coda_vfs_stat;
  75 extern struct coda_cache_inv_stats      coda_cache_inv_stat;
  76
  77 /* reset statistics to 0 */
  78 void reset_coda_vfs_stats( void );
  79 void reset_coda_cache_inv_stats( void );
  80
  81 /* like coda_dointvec, these functions are to be registered in the ctl_table
  82  * data structure for /proc/sys/... files
  83  */
  84 int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
  85                              void * buffer, size_t * lenp );
  86 int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
  87                                    struct file * filp, void * buffer,
  88                                    size_t * lenp );
  89
  90 /* these functions are called to form the content of /proc/fs/coda/... files */
  91 int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
  92                              int length);
  93 int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
  94                                    int length);
  95
  96
  97 #endif /* _CODA_PROC_H */