294 lines
6.2 KiB
C
294 lines
6.2 KiB
C
/*
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* Sysctl operations for Coda filesystem
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* Original version: (C) 1996 P. Braam and M. Callahan
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* Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
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*
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* Carnegie Mellon encourages users to contribute improvements to
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* the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
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*
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* CODA operation statistics
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* (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
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*
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*/
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#include <linux/time.h>
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#include <linux/mm.h>
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#include <linux/sysctl.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/ctype.h>
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#include <linux/bitops.h>
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#include <asm/uaccess.h>
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#include <linux/utsname.h>
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#include <linux/module.h>
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#include <linux/coda.h>
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#include <linux/coda_linux.h>
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#include <linux/coda_fs_i.h>
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#include <linux/coda_psdev.h>
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#include <linux/coda_cache.h>
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#include <linux/coda_proc.h>
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static struct ctl_table_header *fs_table_header;
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#define CODA_TIMEOUT 3 /* timeout on upcalls to become intrble */
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#define CODA_HARD 5 /* mount type "hard" or "soft" */
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#define CODA_VFS 6 /* vfs statistics */
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#define CODA_CACHE_INV 9 /* cache invalidation statistics */
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#define CODA_FAKE_STATFS 10 /* don't query venus for actual cache usage */
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struct coda_vfs_stats coda_vfs_stat;
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static struct coda_cache_inv_stats coda_cache_inv_stat;
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static void reset_coda_vfs_stats( void )
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{
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memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
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}
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static void reset_coda_cache_inv_stats( void )
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{
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memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
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}
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static int do_reset_coda_vfs_stats( ctl_table * table, int write,
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struct file * filp, void __user * buffer,
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size_t * lenp, loff_t * ppos )
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{
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if ( write ) {
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reset_coda_vfs_stats();
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*ppos += *lenp;
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} else {
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*lenp = 0;
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}
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return 0;
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}
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static int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
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struct file * filp,
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void __user * buffer,
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size_t * lenp, loff_t * ppos )
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{
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if ( write ) {
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reset_coda_cache_inv_stats();
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*ppos += *lenp;
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} else {
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*lenp = 0;
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}
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return 0;
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}
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static int proc_vfs_stats_show(struct seq_file *m, void *v)
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{
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struct coda_vfs_stats * ps = & coda_vfs_stat;
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seq_printf(m,
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"Coda VFS statistics\n"
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"===================\n\n"
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"File Operations:\n"
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"\topen\t\t%9d\n"
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"\tflush\t\t%9d\n"
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"\trelease\t\t%9d\n"
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"\tfsync\t\t%9d\n\n"
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"Dir Operations:\n"
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"\treaddir\t\t%9d\n\n"
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"Inode Operations\n"
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"\tcreate\t\t%9d\n"
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"\tlookup\t\t%9d\n"
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"\tlink\t\t%9d\n"
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"\tunlink\t\t%9d\n"
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"\tsymlink\t\t%9d\n"
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"\tmkdir\t\t%9d\n"
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"\trmdir\t\t%9d\n"
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"\trename\t\t%9d\n"
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"\tpermission\t%9d\n",
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/* file operations */
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ps->open,
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ps->flush,
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ps->release,
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ps->fsync,
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/* dir operations */
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ps->readdir,
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/* inode operations */
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ps->create,
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ps->lookup,
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ps->link,
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ps->unlink,
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ps->symlink,
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ps->mkdir,
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ps->rmdir,
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ps->rename,
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ps->permission);
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return 0;
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}
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static int proc_cache_inv_stats_show(struct seq_file *m, void *v)
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{
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struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
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seq_printf(m,
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"Coda cache invalidation statistics\n"
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"==================================\n\n"
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"flush\t\t%9d\n"
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"purge user\t%9d\n"
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"zap_dir\t\t%9d\n"
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"zap_file\t%9d\n"
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"zap_vnode\t%9d\n"
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"purge_fid\t%9d\n"
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"replace\t\t%9d\n",
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ps->flush,
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ps->purge_user,
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ps->zap_dir,
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ps->zap_file,
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ps->zap_vnode,
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ps->purge_fid,
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ps->replace );
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return 0;
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}
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static int proc_vfs_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, proc_vfs_stats_show, NULL);
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}
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static int proc_cache_inv_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, proc_cache_inv_stats_show, NULL);
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}
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static const struct file_operations proc_vfs_stats_fops = {
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.owner = THIS_MODULE,
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.open = proc_vfs_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations proc_cache_inv_stats_fops = {
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.owner = THIS_MODULE,
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.open = proc_cache_inv_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static ctl_table coda_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "timeout",
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.data = &coda_timeout,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "hard",
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.data = &coda_hard,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dointvec
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "vfs_stats",
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.data = NULL,
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.maxlen = 0,
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.mode = 0644,
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.proc_handler = &do_reset_coda_vfs_stats
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "cache_inv_stats",
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.data = NULL,
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.maxlen = 0,
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.mode = 0644,
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.proc_handler = &do_reset_coda_cache_inv_stats
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},
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "fake_statfs",
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.data = &coda_fake_statfs,
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.maxlen = sizeof(int),
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.mode = 0600,
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.proc_handler = &proc_dointvec
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},
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{}
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};
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static ctl_table fs_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "coda",
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.mode = 0555,
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.child = coda_table
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},
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{}
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};
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#ifdef CONFIG_PROC_FS
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/*
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target directory structure:
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/proc/fs (see linux/fs/proc/root.c)
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/proc/fs/coda
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/proc/fs/coda/{vfs_stats,
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*/
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static struct proc_dir_entry* proc_fs_coda;
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#endif
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void coda_sysctl_init(void)
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{
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reset_coda_vfs_stats();
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reset_coda_cache_inv_stats();
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#ifdef CONFIG_PROC_FS
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proc_fs_coda = proc_mkdir("coda", proc_root_fs);
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if (proc_fs_coda) {
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struct proc_dir_entry *pde;
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proc_fs_coda->owner = THIS_MODULE;
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pde = create_proc_entry("vfs_stats", 0, proc_fs_coda);
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if (pde)
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pde->proc_fops = &proc_vfs_stats_fops;
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pde = create_proc_entry("cache_inv_stats", 0, proc_fs_coda);
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if (pde)
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pde->proc_fops = &proc_cache_inv_stats_fops;
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}
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#endif
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#ifdef CONFIG_SYSCTL
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if ( !fs_table_header )
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fs_table_header = register_sysctl_table(fs_table);
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#endif
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}
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void coda_sysctl_clean(void)
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{
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#ifdef CONFIG_SYSCTL
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if ( fs_table_header ) {
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unregister_sysctl_table(fs_table_header);
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fs_table_header = NULL;
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}
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#endif
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#ifdef CONFIG_PROC_FS
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remove_proc_entry("cache_inv_stats", proc_fs_coda);
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remove_proc_entry("vfs_stats", proc_fs_coda);
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remove_proc_entry("coda", proc_root_fs);
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#endif
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}
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