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/*
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 * coda_statis.h
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 *
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 * CODA operation statistics
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 *
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 * (c) March, 1998
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 * by Michihiro Kuramochi, Zhenyu Xia and Zhanyong Wan
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 * zhanyong.wan@yale.edu
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 *
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 */
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#ifndef _CODA_PROC_H
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#define _CODA_PROC_H
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void coda_sysctl_init(void);
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void coda_sysctl_clean(void);
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#include <linux/sysctl.h>
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#include <linux/coda_fs_i.h>
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#include <linux/coda.h>
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/* these four files are presented to show the result of the statistics:
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 *
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 *      /proc/fs/coda/vfs_stats
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 *                    cache_inv_stats
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 *
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 * these four files are presented to reset the statistics to 0:
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 *
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 *      /proc/sys/coda/vfs_stats
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 *                     cache_inv_stats
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 */
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/* VFS operation statistics */
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struct coda_vfs_stats
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{
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        /* file operations */
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        int open;
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        int flush;
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        int release;
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        int fsync;
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        /* dir operations */
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        int readdir;
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        /* inode operations */
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        int create;
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        int lookup;
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        int link;
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        int unlink;
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        int symlink;
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        int mkdir;
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        int rmdir;
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        int rename;
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        int permission;
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        /* symlink operatoins*/
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        int follow_link;
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        int readlink;
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};
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/* cache invalidation statistics */
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struct coda_cache_inv_stats
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{
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        int flush;
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        int purge_user;
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        int zap_dir;
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        int zap_file;
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        int zap_vnode;
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        int purge_fid;
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        int replace;
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};
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/* these global variables hold the actual statistics data */
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extern struct coda_vfs_stats            coda_vfs_stat;
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extern struct coda_cache_inv_stats      coda_cache_inv_stat;
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/* reset statistics to 0 */
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void reset_coda_vfs_stats( void );
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void reset_coda_cache_inv_stats( void );
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/* like coda_dointvec, these functions are to be registered in the ctl_table
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 * data structure for /proc/sys/... files
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 */
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int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
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                             void * buffer, size_t * lenp );
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int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
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                                   struct file * filp, void * buffer,
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                                   size_t * lenp );
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/* these functions are called to form the content of /proc/fs/coda/... files */
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int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
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                             int length);
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int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
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                                   int length);
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#endif /* _CODA_PROC_H */