diff options
Diffstat (limited to 'fs/coda/sysctl.c')
| -rw-r--r-- | fs/coda/sysctl.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/fs/coda/sysctl.c b/fs/coda/sysctl.c new file mode 100644 index 0000000..f0b1075 --- /dev/null +++ b/fs/coda/sysctl.c @@ -0,0 +1,254 @@ +/* + * 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/time.h> +#include <linux/mm.h> +#include <linux/sysctl.h> +#include <linux/proc_fs.h> +#include <linux/slab.h> +#include <linux/stat.h> +#include <linux/ctype.h> +#include <linux/bitops.h> +#include <asm/uaccess.h> +#include <linux/utsname.h> +#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_TIMEOUT 3 /* timeout on upcalls to become intrble */ +#define CODA_HARD 5 /* mount type "hard" or "soft" */ +#define CODA_VFS 6 /* vfs statistics */ +#define CODA_CACHE_INV 9 /* cache invalidation statistics */ +#define CODA_FAKE_STATFS 10 /* don't query venus for actual cache usage */ + +struct coda_vfs_stats coda_vfs_stat; +static struct coda_cache_inv_stats coda_cache_inv_stat; + +static void reset_coda_vfs_stats( void ) +{ + memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) ); +} + +static void reset_coda_cache_inv_stats( void ) +{ + memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) ); +} + +static int do_reset_coda_vfs_stats( ctl_table * table, int write, + struct file * filp, void __user * buffer, + size_t * lenp, loff_t * ppos ) +{ + if ( write ) { + reset_coda_vfs_stats(); + + *ppos += *lenp; + } else { + *lenp = 0; + } + + return 0; +} + +static int do_reset_coda_cache_inv_stats( ctl_table * table, int write, + struct file * filp, + void __user * buffer, + size_t * lenp, loff_t * ppos ) +{ + if ( write ) { + reset_coda_cache_inv_stats(); + + *ppos += *lenp; + } else { + *lenp = 0; + } + + return 0; +} + +static 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; +} + +static 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; +} + +static ctl_table coda_table[] = { + {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_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} +}; + + +#ifdef CONFIG_PROC_FS + +/* + target directory structure: + /proc/fs (see linux/fs/proc/root.c) + /proc/fs/coda + /proc/fs/coda/{vfs_stats, + +*/ + +static 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(void) +{ + reset_coda_vfs_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("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(void) +{ + +#ifdef CONFIG_SYSCTL + if ( fs_table_header ) { + unregister_sysctl_table(fs_table_header); + fs_table_header = NULL; + } +#endif + +#ifdef CONFIG_PROC_FS + remove_proc_entry("cache_inv_stats", proc_fs_coda); + remove_proc_entry("vfs_stats", proc_fs_coda); + remove_proc_entry("coda", proc_root_fs); +#endif +} |
