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 */
142
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