URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [fs/] [coda/] [sysctl.c] - Blame information for rev 1780

Go to most recent revision | Details | Compare with Previous | View Log


/*
 * Sysctl operations for Coda filesystem
 * Original version: (C) 1996 P. Braam and M. Callahan
 * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
 *
 * Carnegie Mellon encourages users to contribute improvements to
 * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
 *
 * CODA operation statistics
 * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
 *
 */
 
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/swapctl.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <asm/bitops.h>
#include <asm/uaccess.h>
#include <linux/utsname.h>
#define __NO_VERSION__
#include <linux/module.h>
 
#include <linux/coda.h>
#include <linux/coda_linux.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_psdev.h>
#include <linux/coda_cache.h>
#include <linux/coda_proc.h>
 
static struct ctl_table_header *fs_table_header;
 
#define FS_CODA         1       /* Coda file system */
 
#define CODA_DEBUG       1       /* control debugging */
#define CODA_ENTRY       2       /* control enter/leave pattern */
#define CODA_TIMEOUT    3       /* timeout on upcalls to become intrble */
#define CODA_MC         4       /* use/do not use the access cache */
#define CODA_HARD       5       /* mount type "hard" or "soft" */
#define CODA_VFS         6       /* vfs statistics */
#define CODA_UPCALL      7       /* upcall statistics */
#define CODA_PERMISSION  8       /* permission statistics */
#define CODA_CACHE_INV   9       /* cache invalidation statistics */
#define CODA_FAKE_STATFS 10      /* don't query venus for actual cache usage */
 
static ctl_table coda_table[] = {
        {CODA_DEBUG, "debug", &coda_debug, sizeof(int), 0644, NULL, &proc_dointvec},
        {CODA_MC, "accesscache", &coda_access_cache, sizeof(int), 0644, NULL, &proc_dointvec},
        {CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &proc_dointvec},
        {CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &proc_dointvec},
        {CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
        {CODA_UPCALL, "upcall_stats", NULL, 0, 0644, NULL, &do_reset_coda_upcall_stats},
        {CODA_PERMISSION, "permission_stats", NULL, 0, 0644, NULL, &do_reset_coda_permission_stats},
        {CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
        {CODA_FAKE_STATFS, "fake_statfs", &coda_fake_statfs, sizeof(int), 0600, NULL, &proc_dointvec},
        { 0 }
};
 
static ctl_table fs_table[] = {
       {FS_CODA, "coda",    NULL, 0, 0555, coda_table},
       {0}
};
 
struct coda_vfs_stats           coda_vfs_stat;
struct coda_permission_stats    coda_permission_stat;
struct coda_cache_inv_stats     coda_cache_inv_stat;
struct coda_upcall_stats_entry  coda_upcall_stat[CODA_NCALLS];
struct coda_upcallstats         coda_callstats;
int                             coda_upcall_timestamping = 0;
 
/* keep this in sync with coda.h! */
char *coda_upcall_names[] = {
        "totals      ",   /*  0 */
        "-           ",   /*  1 */
        "root        ",   /*  2 */
        "open_by_fd  ",   /*  3 */
        "open        ",   /*  4 */
        "close       ",   /*  5 */
        "ioctl       ",   /*  6 */
        "getattr     ",   /*  7 */
        "setattr     ",   /*  8 */
        "access      ",   /*  9 */
        "lookup      ",   /* 10 */
        "create      ",   /* 11 */
        "remove      ",   /* 12 */
        "link        ",   /* 13 */
        "rename      ",   /* 14 */
        "mkdir       ",   /* 15 */
        "rmdir       ",   /* 16 */
        "readdir     ",   /* 17 */
        "symlink     ",   /* 18 */
        "readlink    ",   /* 19 */
        "fsync       ",   /* 20 */
        "-           ",   /* 21 */
        "vget        ",   /* 22 */
        "signal      ",   /* 23 */
        "replace     ",   /* 24 */
        "flush       ",   /* 25 */
        "purgeuser   ",   /* 26 */
        "zapfile     ",   /* 27 */
        "zapdir      ",   /* 28 */
        "-           ",   /* 29 */
        "purgefid    ",   /* 30 */
        "open_by_path",   /* 31 */
        "resolve     ",   /* 32 */
        "reintegrate ",   /* 33 */
        "statfs      ",   /* 34 */
        "store       ",   /* 35 */
        "release     "    /* 36 */
};
 
 
void reset_coda_vfs_stats( void )
{
        memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
}
 
void reset_coda_upcall_stats( void )
{
        memset( &coda_upcall_stat, 0, sizeof( coda_upcall_stat ) );
}
 
void reset_coda_permission_stats( void )
{
        memset( &coda_permission_stat, 0, sizeof( coda_permission_stat ) );
}
 
void reset_coda_cache_inv_stats( void )
{
        memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
}
 
 
void do_time_stats( struct coda_upcall_stats_entry * pentry,
                    unsigned long runtime )
{
        unsigned long time = runtime;   /* time in us */
        CDEBUG(D_SPECIAL, "time: %ld\n", time);
 
        if ( pentry->count == 0 ) {
                pentry->time_sum = pentry->time_squared_sum = 0;
        }
 
        pentry->count++;
        pentry->time_sum += time;
        pentry->time_squared_sum += time*time;
}
 
 
 
void coda_upcall_stats(int opcode, long unsigned runtime)
{
        struct coda_upcall_stats_entry * pentry;
 
        if ( opcode < 0 || opcode > CODA_NCALLS - 1) {
                printk("Nasty opcode %d passed to coda_upcall_stats\n",
                       opcode);
                return;
        }
 
        pentry = &coda_upcall_stat[opcode];
        do_time_stats(pentry, runtime);
 
        /* fill in the totals */
        pentry = &coda_upcall_stat[0];
        do_time_stats(pentry, runtime);
 
}
 
unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry )
{
        return ( pentry->count == 0 ) ? 0 : pentry->time_sum / pentry->count;
}
 
static inline unsigned long absolute( unsigned long x )
{
        return x >= 0 ? x : -x;
}
 
static unsigned long sqr_root( unsigned long x )
{
        unsigned long y = x, r;
        int n_bit = 0;
 
        if ( x == 0 )
                return 0;
        if ( x < 0)
                x = -x;
 
        while ( y ) {
                y >>= 1;
                n_bit++;
        }
 
        r = 1 << (n_bit/2);
 
        while ( 1 ) {
                r = (r + x/r)/2;
                if ( r*r <= x && x < (r+1)*(r+1) )
                        break;
        }
 
        return r;
}
 
unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry )
{
        unsigned long time_avg;
 
        if ( pentry->count <= 1 )
                return 0;
 
        time_avg = get_time_average( pentry );
 
        return sqr_root( (pentry->time_squared_sum / pentry->count) -
                            time_avg * time_avg );
}
 
int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
                             void * buffer, size_t * lenp )
{
        if ( write ) {
                reset_coda_vfs_stats();
 
                filp->f_pos += *lenp;
        } else {
                *lenp = 0;
        }
 
        return 0;
}
 
int do_reset_coda_upcall_stats( ctl_table * table, int write,
                                struct file * filp, void * buffer,
                                size_t * lenp )
{
        if ( write ) {
                if (*lenp > 0) {
                        char c;
                        if (get_user(c, (char *)buffer))
                                return -EFAULT;
                        coda_upcall_timestamping = (c == '1');
                }
                reset_coda_upcall_stats();
 
                filp->f_pos += *lenp;
        } else {
                *lenp = 0;
        }
 
        return 0;
}
 
int do_reset_coda_permission_stats( ctl_table * table, int write,
                                    struct file * filp, void * buffer,
                                    size_t * lenp )
{
        if ( write ) {
                reset_coda_permission_stats();
 
                filp->f_pos += *lenp;
        } else {
                *lenp = 0;
        }
 
        return 0;
}
 
int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
                                   struct file * filp, void * buffer,
                                   size_t * lenp )
{
        if ( write ) {
                reset_coda_cache_inv_stats();
 
                filp->f_pos += *lenp;
        } else {
                *lenp = 0;
        }
 
        return 0;
}
 
int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
                             int length)
{
        int len=0;
        off_t begin;
        struct coda_vfs_stats * ps = & coda_vfs_stat;
 
  /* this works as long as we are below 1024 characters! */
        len += sprintf( buffer,
                        "Coda VFS statistics\n"
                        "===================\n\n"
                        "File Operations:\n"
                        "\topen\t\t%9d\n"
                        "\tflush\t\t%9d\n"
                        "\trelease\t\t%9d\n"
                        "\tfsync\t\t%9d\n\n"
                        "Dir Operations:\n"
                        "\treaddir\t\t%9d\n\n"
                        "Inode Operations\n"
                        "\tcreate\t\t%9d\n"
                        "\tlookup\t\t%9d\n"
                        "\tlink\t\t%9d\n"
                        "\tunlink\t\t%9d\n"
                        "\tsymlink\t\t%9d\n"
                        "\tmkdir\t\t%9d\n"
                        "\trmdir\t\t%9d\n"
                        "\trename\t\t%9d\n"
                        "\tpermission\t%9d\n",
 
                        /* file operations */
                        ps->open,
                        ps->flush,
                        ps->release,
                        ps->fsync,
 
                        /* dir operations */
                        ps->readdir,
 
                        /* inode operations */
                        ps->create,
                        ps->lookup,
                        ps->link,
                        ps->unlink,
                        ps->symlink,
                        ps->mkdir,
                        ps->rmdir,
                        ps->rename,
                        ps->permission);
 
        begin = offset;
        *start = buffer + begin;
        len -= begin;
 
        if ( len > length )
                len = length;
        if ( len < 0 )
                len = 0;
 
        return len;
}
 
int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
                                int length)
{
        int len=0;
        int i;
        off_t begin;
        off_t pos = 0;
        char tmpbuf[80];
        int tmplen = 0;
 
        /* this works as long as we are below 1024 characters! */
        if ( offset < 80 )
                len += sprintf( buffer,"%-79s\n",       "Coda upcall statistics");
        if ( offset < 160)
                len += sprintf( buffer + len,"%-79s\n", "======================");
        if ( offset < 240)
                len += sprintf( buffer + len,"%-79s\n", "upcall              count       avg time(us)    std deviation(us)");
        if ( offset < 320)
                len += sprintf( buffer + len,"%-79s\n", "------              -----       ------------    -----------------");
        pos = 320;
        for ( i = 0 ; i < CODA_NCALLS ; i++ ) {
                tmplen += sprintf(tmpbuf,"%s    %9d       %10ld      %10ld",
                                  coda_upcall_names[i],
                                  coda_upcall_stat[i].count,
                                  get_time_average(&coda_upcall_stat[i]),
                                  coda_upcall_stat[i].time_squared_sum);
                pos += 80;
                if ( pos < offset )
                        continue;
                len += sprintf(buffer + len, "%-79s\n", tmpbuf);
                if ( len >= length )
                        break;
        }
 
        begin = len- (pos - offset);
        *start = buffer + begin;
        len -= begin;
 
        if ( len > length )
                len = length;
        if ( len < 0 )
                len = 0;
 
        return len;
}
 
int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
                                    int length)
{
        int len=0;
        off_t begin;
        struct coda_permission_stats * ps = & coda_permission_stat;
 
        /* this works as long as we are below 1024 characters! */
        len += sprintf( buffer,
                        "Coda permission statistics\n"
                        "==========================\n\n"
                        "count\t\t%9d\n"
                        "hit count\t%9d\n",
 
                        ps->count,
                        ps->hit_count );
 
        begin = offset;
        *start = buffer + begin;
        len -= begin;
 
        if ( len > length )
                len = length;
        if ( len < 0 )
                len = 0;
 
        return len;
}
 
int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
                                   int length)
{
        int len=0;
        off_t begin;
        struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
 
        /* this works as long as we are below 1024 characters! */
        len += sprintf( buffer,
                        "Coda cache invalidation statistics\n"
                        "==================================\n\n"
                        "flush\t\t%9d\n"
                        "purge user\t%9d\n"
                        "zap_dir\t\t%9d\n"
                        "zap_file\t%9d\n"
                        "zap_vnode\t%9d\n"
                        "purge_fid\t%9d\n"
                        "replace\t\t%9d\n",
                        ps->flush,
                        ps->purge_user,
                        ps->zap_dir,
                        ps->zap_file,
                        ps->zap_vnode,
                        ps->purge_fid,
                        ps->replace );
 
        begin = offset;
        *start = buffer + begin;
        len -= begin;
 
        if ( len > length )
                len = length;
        if ( len < 0 )
                len = 0;
 
        return len;
}
 
 
#ifdef CONFIG_PROC_FS
 
/*
 target directory structure:
   /proc/fs  (see linux/fs/proc/root.c)
   /proc/fs/coda
   /proc/fs/coda/{vfs_stats,
 
*/
 
struct proc_dir_entry* proc_fs_coda;
 
#endif
 
#define coda_proc_create(name,get_info) \
        create_proc_info_entry(name, 0, proc_fs_coda, get_info)
 
void coda_sysctl_init()
{
        memset(&coda_callstats, 0, sizeof(coda_callstats));
        reset_coda_vfs_stats();
        reset_coda_upcall_stats();
        reset_coda_permission_stats();
        reset_coda_cache_inv_stats();
 
#ifdef CONFIG_PROC_FS
        proc_fs_coda = proc_mkdir("coda", proc_root_fs);
        if (proc_fs_coda) {
                proc_fs_coda->owner = THIS_MODULE;
                coda_proc_create("vfs_stats", coda_vfs_stats_get_info);
                coda_proc_create("upcall_stats", coda_upcall_stats_get_info);
                coda_proc_create("permission_stats", coda_permission_stats_get_info);
                coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info);
        }
#endif
 
#ifdef CONFIG_SYSCTL
        if ( !fs_table_header )
                fs_table_header = register_sysctl_table(fs_table, 0);
#endif 
}
 
void coda_sysctl_clean()
{
 
#ifdef CONFIG_SYSCTL
        if ( fs_table_header ) {
                unregister_sysctl_table(fs_table_header);
                fs_table_header = 0;
        }
#endif
 
#if CONFIG_PROC_FS
        remove_proc_entry("cache_inv_stats", proc_fs_coda);
        remove_proc_entry("permission_stats", proc_fs_coda);
        remove_proc_entry("upcall_stats", proc_fs_coda);
        remove_proc_entry("vfs_stats", proc_fs_coda);
        remove_proc_entry("coda", proc_root_fs);
#endif 
}

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [fs/] [coda/] [sysctl.c] - Blame information for rev 1780

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* Sysctl operations for Coda filesystem`
3			`* Original version: (C) 1996 P. Braam and M. Callahan`
4			`* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University`
5			`*`
6			`* Carnegie Mellon encourages users to contribute improvements to`
7			`* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).`
8			`*`
9			`* CODA operation statistics`
10			`* (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>`
11			`*`
12			`*/`
13
14			`#include <linux/config.h>`
15			`#include <linux/sched.h>`
16			`#include <linux/mm.h>`
17			`#include <linux/sysctl.h>`
18			`#include <linux/swapctl.h>`
19			`#include <linux/proc_fs.h>`
20			`#include <linux/slab.h>`
21			`#include <linux/stat.h>`
22			`#include <linux/ctype.h>`
23			`#include <asm/bitops.h>`
24			`#include <asm/uaccess.h>`
25			`#include <linux/utsname.h>`
26			`#define __NO_VERSION__`
27			`#include <linux/module.h>`
28
29			`#include <linux/coda.h>`
30			`#include <linux/coda_linux.h>`
31			`#include <linux/coda_fs_i.h>`
32			`#include <linux/coda_psdev.h>`
33			`#include <linux/coda_cache.h>`
34			`#include <linux/coda_proc.h>`
35
36			`static struct ctl_table_header *fs_table_header;`
37
38			`#define FS_CODA 1 /* Coda file system */`
39
40			`#define CODA_DEBUG 1 /* control debugging */`
41			`#define CODA_ENTRY 2 /* control enter/leave pattern */`
42			`#define CODA_TIMEOUT 3 /* timeout on upcalls to become intrble */`
43			`#define CODA_MC 4 /* use/do not use the access cache */`
44			`#define CODA_HARD 5 /* mount type "hard" or "soft" */`
45			`#define CODA_VFS 6 /* vfs statistics */`
46			`#define CODA_UPCALL 7 /* upcall statistics */`
47			`#define CODA_PERMISSION 8 /* permission statistics */`
48			`#define CODA_CACHE_INV 9 /* cache invalidation statistics */`
49			`#define CODA_FAKE_STATFS 10 /* don't query venus for actual cache usage */`
50
51			`static ctl_table coda_table[] = {`
52			`{CODA_DEBUG, "debug", &coda_debug, sizeof(int), 0644, NULL, &proc_dointvec},`
53			`{CODA_MC, "accesscache", &coda_access_cache, sizeof(int), 0644, NULL, &proc_dointvec},`
54			`{CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &proc_dointvec},`
55			`{CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &proc_dointvec},`
56			`{CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},`
57			`{CODA_UPCALL, "upcall_stats", NULL, 0, 0644, NULL, &do_reset_coda_upcall_stats},`
58			`{CODA_PERMISSION, "permission_stats", NULL, 0, 0644, NULL, &do_reset_coda_permission_stats},`
59			`{CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},`
60			`{CODA_FAKE_STATFS, "fake_statfs", &coda_fake_statfs, sizeof(int), 0600, NULL, &proc_dointvec},`
61			`{ 0 }`
62			`};`
63
64			`static ctl_table fs_table[] = {`
65			`{FS_CODA, "coda", NULL, 0, 0555, coda_table},`
66			`{0}`
67			`};`
68
69			`struct coda_vfs_stats coda_vfs_stat;`
70			`struct coda_permission_stats coda_permission_stat;`
71			`struct coda_cache_inv_stats coda_cache_inv_stat;`
72			`struct coda_upcall_stats_entry coda_upcall_stat[CODA_NCALLS];`
73			`struct coda_upcallstats coda_callstats;`
74			`int coda_upcall_timestamping = 0;`
75
76			`/* keep this in sync with coda.h! */`
77			`char *coda_upcall_names[] = {`
78			`"totals ", /* 0 */`
79			`"- ", /* 1 */`
80			`"root ", /* 2 */`
81			`"open_by_fd ", /* 3 */`
82			`"open ", /* 4 */`
83			`"close ", /* 5 */`
84			`"ioctl ", /* 6 */`
85			`"getattr ", /* 7 */`
86			`"setattr ", /* 8 */`
87			`"access ", /* 9 */`
88			`"lookup ", /* 10 */`
89			`"create ", /* 11 */`
90			`"remove ", /* 12 */`
91			`"link ", /* 13 */`
92			`"rename ", /* 14 */`
93			`"mkdir ", /* 15 */`
94			`"rmdir ", /* 16 */`
95			`"readdir ", /* 17 */`
96			`"symlink ", /* 18 */`
97			`"readlink ", /* 19 */`
98			`"fsync ", /* 20 */`
99			`"- ", /* 21 */`
100			`"vget ", /* 22 */`
101			`"signal ", /* 23 */`
102			`"replace ", /* 24 */`
103			`"flush ", /* 25 */`
104			`"purgeuser ", /* 26 */`
105			`"zapfile ", /* 27 */`
106			`"zapdir ", /* 28 */`
107			`"- ", /* 29 */`
108			`"purgefid ", /* 30 */`
109			`"open_by_path", /* 31 */`
110			`"resolve ", /* 32 */`
111			`"reintegrate ", /* 33 */`
112			`"statfs ", /* 34 */`
113			`"store ", /* 35 */`
114			`"release " /* 36 */`
115			`};`
116
117
118			`void reset_coda_vfs_stats( void )`
119			`{`
120			`memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );`
121			`}`
122
123			`void reset_coda_upcall_stats( void )`
124			`{`
125			`memset( &coda_upcall_stat, 0, sizeof( coda_upcall_stat ) );`
126			`}`
127
128			`void reset_coda_permission_stats( void )`
129			`{`
130			`memset( &coda_permission_stat, 0, sizeof( coda_permission_stat ) );`
131			`}`
132
133			`void reset_coda_cache_inv_stats( void )`
134			`{`
135			`memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );`
136			`}`
137
138
139			`void do_time_stats( struct coda_upcall_stats_entry * pentry,`
140			`unsigned long runtime )`
141			`{`
142			`unsigned long time = runtime; /* time in us */`
143			`CDEBUG(D_SPECIAL, "time: %ld\n", time);`
144
145			`if ( pentry->count == 0 ) {`
146			`pentry->time_sum = pentry->time_squared_sum = 0;`
147			`}`
148
149			`pentry->count++;`
150			`pentry->time_sum += time;`
151			`pentry->time_squared_sum += time*time;`
152			`}`
153
154
155
156			`void coda_upcall_stats(int opcode, long unsigned runtime)`
157			`{`
158			`struct coda_upcall_stats_entry * pentry;`
159
160			`if ( opcode < 0 \|\| opcode > CODA_NCALLS - 1) {`
161			`printk("Nasty opcode %d passed to coda_upcall_stats\n",`
162			`opcode);`
163			`return;`
164			`}`
165
166			`pentry = &coda_upcall_stat[opcode];`
167			`do_time_stats(pentry, runtime);`
168
169			`/* fill in the totals */`
170			`pentry = &coda_upcall_stat[0];`
171			`do_time_stats(pentry, runtime);`
172
173			`}`
174
175			`unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry )`
176			`{`
177			`return ( pentry->count == 0 ) ? 0 : pentry->time_sum / pentry->count;`
178			`}`
179
180			`static inline unsigned long absolute( unsigned long x )`
181			`{`
182			`return x >= 0 ? x : -x;`
183			`}`
184
185			`static unsigned long sqr_root( unsigned long x )`
186			`{`
187			`unsigned long y = x, r;`
188			`int n_bit = 0;`
189
190			`if ( x == 0 )`
191			`return 0;`
192			`if ( x < 0)`
193			`x = -x;`
194
195			`while ( y ) {`
196			`y >>= 1;`
197			`n_bit++;`
198			`}`
199
200			`r = 1 << (n_bit/2);`
201
202			`while ( 1 ) {`
203			`r = (r + x/r)/2;`
204			`if ( rr <= x && x < (r+1)(r+1) )`
205			`break;`
206			`}`
207
208			`return r;`
209			`}`
210
211			`unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry )`
212			`{`
213			`unsigned long time_avg;`
214
215			`if ( pentry->count <= 1 )`
216			`return 0;`
217
218			`time_avg = get_time_average( pentry );`
219
220			`return sqr_root( (pentry->time_squared_sum / pentry->count) -`
221			`time_avg * time_avg );`
222			`}`
223
224			`int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,`
225			`void * buffer, size_t * lenp )`
226			`{`
227			`if ( write ) {`
228			`reset_coda_vfs_stats();`
229
230			`filp->f_pos += *lenp;`
231			`} else {`
232			`*lenp = 0;`
233			`}`
234
235			`return 0;`
236			`}`
237
238			`int do_reset_coda_upcall_stats( ctl_table * table, int write,`
239			`struct file * filp, void * buffer,`
240			`size_t * lenp )`
241			`{`
242			`if ( write ) {`
243			`if (*lenp > 0) {`
244			`char c;`
245			`if (get_user(c, (char *)buffer))`
246			`return -EFAULT;`
247			`coda_upcall_timestamping = (c == '1');`
248			`}`
249			`reset_coda_upcall_stats();`
250
251			`filp->f_pos += *lenp;`
252			`} else {`
253			`*lenp = 0;`
254			`}`
255
256			`return 0;`
257			`}`
258
259			`int do_reset_coda_permission_stats( ctl_table * table, int write,`
260			`struct file * filp, void * buffer,`
261			`size_t * lenp )`
262			`{`
263			`if ( write ) {`
264			`reset_coda_permission_stats();`
265
266			`filp->f_pos += *lenp;`
267			`} else {`
268			`*lenp = 0;`
269			`}`
270
271			`return 0;`
272			`}`
273
274			`int do_reset_coda_cache_inv_stats( ctl_table * table, int write,`
275			`struct file * filp, void * buffer,`
276			`size_t * lenp )`
277			`{`
278			`if ( write ) {`
279			`reset_coda_cache_inv_stats();`
280
281			`filp->f_pos += *lenp;`
282			`} else {`
283			`*lenp = 0;`
284			`}`
285
286			`return 0;`
287			`}`
288
289			`int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,`
290			`int length)`
291			`{`
292			`int len=0;`
293			`off_t begin;`
294			`struct coda_vfs_stats * ps = & coda_vfs_stat;`
295
296			`/* this works as long as we are below 1024 characters! */`
297			`len += sprintf( buffer,`
298			`"Coda VFS statistics\n"`
299			`"===================\n\n"`
300			`"File Operations:\n"`
301			`"\topen\t\t%9d\n"`
302			`"\tflush\t\t%9d\n"`
303			`"\trelease\t\t%9d\n"`
304			`"\tfsync\t\t%9d\n\n"`
305			`"Dir Operations:\n"`
306			`"\treaddir\t\t%9d\n\n"`
307			`"Inode Operations\n"`
308			`"\tcreate\t\t%9d\n"`
309			`"\tlookup\t\t%9d\n"`
310			`"\tlink\t\t%9d\n"`
311			`"\tunlink\t\t%9d\n"`
312			`"\tsymlink\t\t%9d\n"`
313			`"\tmkdir\t\t%9d\n"`
314			`"\trmdir\t\t%9d\n"`
315			`"\trename\t\t%9d\n"`
316			`"\tpermission\t%9d\n",`
317
318			`/* file operations */`
319			`ps->open,`
320			`ps->flush,`
321			`ps->release,`
322			`ps->fsync,`
323
324			`/* dir operations */`
325			`ps->readdir,`
326
327			`/* inode operations */`
328			`ps->create,`
329			`ps->lookup,`
330			`ps->link,`
331			`ps->unlink,`
332			`ps->symlink,`
333			`ps->mkdir,`
334			`ps->rmdir,`
335			`ps->rename,`
336			`ps->permission);`
337
338			`begin = offset;`
339			`*start = buffer + begin;`
340			`len -= begin;`
341
342			`if ( len > length )`
343			`len = length;`
344			`if ( len < 0 )`
345			`len = 0;`
346
347			`return len;`
348			`}`
349
350			`int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,`
351			`int length)`
352			`{`
353			`int len=0;`
354			`int i;`
355			`off_t begin;`
356			`off_t pos = 0;`
357			`char tmpbuf[80];`
358			`int tmplen = 0;`
359
360			`/* this works as long as we are below 1024 characters! */`
361			`if ( offset < 80 )`
362			`len += sprintf( buffer,"%-79s\n", "Coda upcall statistics");`
363			`if ( offset < 160)`
364			`len += sprintf( buffer + len,"%-79s\n", "======================");`
365			`if ( offset < 240)`
366			`len += sprintf( buffer + len,"%-79s\n", "upcall count avg time(us) std deviation(us)");`
367			`if ( offset < 320)`
368			`len += sprintf( buffer + len,"%-79s\n", "------ ----- ------------ -----------------");`
369			`pos = 320;`
370			`for ( i = 0 ; i < CODA_NCALLS ; i++ ) {`
371			`tmplen += sprintf(tmpbuf,"%s %9d %10ld %10ld",`
372			`coda_upcall_names[i],`
373			`coda_upcall_stat[i].count,`
374			`get_time_average(&coda_upcall_stat[i]),`
375			`coda_upcall_stat[i].time_squared_sum);`
376			`pos += 80;`
377			`if ( pos < offset )`
378			`continue;`
379			`len += sprintf(buffer + len, "%-79s\n", tmpbuf);`
380			`if ( len >= length )`
381			`break;`
382			`}`
383
384			`begin = len- (pos - offset);`
385			`*start = buffer + begin;`
386			`len -= begin;`
387
388			`if ( len > length )`
389			`len = length;`
390			`if ( len < 0 )`
391			`len = 0;`
392
393			`return len;`
394			`}`
395
396			`int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,`
397			`int length)`
398			`{`
399			`int len=0;`
400			`off_t begin;`
401			`struct coda_permission_stats * ps = & coda_permission_stat;`
402
403			`/* this works as long as we are below 1024 characters! */`
404			`len += sprintf( buffer,`
405			`"Coda permission statistics\n"`
406			`"==========================\n\n"`
407			`"count\t\t%9d\n"`
408			`"hit count\t%9d\n",`
409
410			`ps->count,`
411			`ps->hit_count );`
412
413			`begin = offset;`
414			`*start = buffer + begin;`
415			`len -= begin;`
416
417			`if ( len > length )`
418			`len = length;`
419			`if ( len < 0 )`
420			`len = 0;`
421
422			`return len;`
423			`}`
424
425			`int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,`
426			`int length)`
427			`{`
428			`int len=0;`
429			`off_t begin;`
430			`struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;`
431
432			`/* this works as long as we are below 1024 characters! */`
433			`len += sprintf( buffer,`
434			`"Coda cache invalidation statistics\n"`
435			`"==================================\n\n"`
436			`"flush\t\t%9d\n"`
437			`"purge user\t%9d\n"`
438			`"zap_dir\t\t%9d\n"`
439			`"zap_file\t%9d\n"`
440			`"zap_vnode\t%9d\n"`
441			`"purge_fid\t%9d\n"`
442			`"replace\t\t%9d\n",`
443			`ps->flush,`
444			`ps->purge_user,`
445			`ps->zap_dir,`
446			`ps->zap_file,`
447			`ps->zap_vnode,`
448			`ps->purge_fid,`
449			`ps->replace );`
450
451			`begin = offset;`
452			`*start = buffer + begin;`
453			`len -= begin;`
454
455			`if ( len > length )`
456			`len = length;`
457			`if ( len < 0 )`
458			`len = 0;`
459
460			`return len;`
461			`}`
462
463
464			`#ifdef CONFIG_PROC_FS`
465
466			`/*`
467			`target directory structure:`
468			`/proc/fs (see linux/fs/proc/root.c)`
469			`/proc/fs/coda`
470			`/proc/fs/coda/{vfs_stats,`
471
472			`*/`
473
474			`struct proc_dir_entry* proc_fs_coda;`
475
476			`#endif`
477
478			`#define coda_proc_create(name,get_info) \`
479			`create_proc_info_entry(name, 0, proc_fs_coda, get_info)`
480
481			`void coda_sysctl_init()`
482			`{`
483			`memset(&coda_callstats, 0, sizeof(coda_callstats));`
484			`reset_coda_vfs_stats();`
485			`reset_coda_upcall_stats();`
486			`reset_coda_permission_stats();`
487			`reset_coda_cache_inv_stats();`
488
489			`#ifdef CONFIG_PROC_FS`
490			`proc_fs_coda = proc_mkdir("coda", proc_root_fs);`
491			`if (proc_fs_coda) {`
492			`proc_fs_coda->owner = THIS_MODULE;`
493			`coda_proc_create("vfs_stats", coda_vfs_stats_get_info);`
494			`coda_proc_create("upcall_stats", coda_upcall_stats_get_info);`
495			`coda_proc_create("permission_stats", coda_permission_stats_get_info);`
496			`coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info);`
497			`}`
498			`#endif`
499
500			`#ifdef CONFIG_SYSCTL`
501			`if ( !fs_table_header )`
502			`fs_table_header = register_sysctl_table(fs_table, 0);`
503			`#endif`
504			`}`
505
506			`void coda_sysctl_clean()`
507			`{`
508
509			`#ifdef CONFIG_SYSCTL`
510			`if ( fs_table_header ) {`
511			`unregister_sysctl_table(fs_table_header);`
512			`fs_table_header = 0;`
513			`}`
514			`#endif`
515
516			`#if CONFIG_PROC_FS`
517			`remove_proc_entry("cache_inv_stats", proc_fs_coda);`
518			`remove_proc_entry("permission_stats", proc_fs_coda);`
519			`remove_proc_entry("upcall_stats", proc_fs_coda);`
520			`remove_proc_entry("vfs_stats", proc_fs_coda);`
521			`remove_proc_entry("coda", proc_root_fs);`
522			`#endif`
523			`}`