sysctl.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * linux/net/sunrpc/sysctl.c
- *
- * Sysctl interface to sunrpc module. This is for debugging only now.
- *
- * I would prefer to register the sunrpc table below sys/net, but that's
- * impossible at the moment.
- */
- #include <linux/config.h>
- #include <linux/version.h>
- #include <linux/types.h>
- #include <linux/linkage.h>
- #include <linux/ctype.h>
- #include <linux/fs.h>
- #include <linux/sysctl.h>
- #define __NO_VERSION__
- #include <linux/module.h>
- #include <asm/uaccess.h>
- #include <linux/sunrpc/types.h>
- #include <linux/sunrpc/sched.h>
- #include <linux/sunrpc/stats.h>
- /*
- * Declare the debug flags here
- */
- unsigned int rpc_debug;
- unsigned int nfs_debug;
- unsigned int nfsd_debug;
- unsigned int nlm_debug;
- #ifdef RPC_DEBUG
- static struct ctl_table_header *sunrpc_table_header;
- static ctl_table sunrpc_table[];
- void
- rpc_register_sysctl(void)
- {
- if (!sunrpc_table_header) {
- sunrpc_table_header = register_sysctl_table(sunrpc_table, 1);
- #ifdef CONFIG_PROC_FS
- if (sunrpc_table[0].de)
- sunrpc_table[0].de->owner = THIS_MODULE;
- #endif
- }
-
- }
- void
- rpc_unregister_sysctl(void)
- {
- if (sunrpc_table_header) {
- unregister_sysctl_table(sunrpc_table_header);
- sunrpc_table_header = NULL;
- }
- }
- static int
- proc_dodebug(ctl_table *table, int write, struct file *file,
- void *buffer, size_t *lenp)
- {
- char tmpbuf[20], *p, c;
- unsigned int value;
- size_t left, len;
- if ((file->f_pos && !write) || !*lenp) {
- *lenp = 0;
- return 0;
- }
- left = *lenp;
- if (write) {
- if (!access_ok(VERIFY_READ, buffer, left))
- return -EFAULT;
- p = (char *) buffer;
- while (left && __get_user(c, p) >= 0 && isspace(c))
- left--, p++;
- if (!left)
- goto done;
- if (left > sizeof(tmpbuf) - 1)
- return -EINVAL;
- copy_from_user(tmpbuf, p, left);
- tmpbuf[left] = ' ';
- for (p = tmpbuf, value = 0; '0' <= *p && *p <= '9'; p++, left--)
- value = 10 * value + (*p - '0');
- if (*p && !isspace(*p))
- return -EINVAL;
- while (left && isspace(*p))
- left--, p++;
- *(unsigned int *) table->data = value;
- /* Display the RPC tasks on writing to rpc_debug */
- if (table->ctl_name == CTL_RPCDEBUG) {
- rpc_show_tasks();
- }
- } else {
- if (!access_ok(VERIFY_WRITE, buffer, left))
- return -EFAULT;
- len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
- if (len > left)
- len = left;
- copy_to_user(buffer, tmpbuf, len);
- if ((left -= len) > 0) {
- put_user('n', (char *)buffer + len);
- left--;
- }
- }
- done:
- *lenp -= left;
- file->f_pos += *lenp;
- return 0;
- }
- #define DIRENTRY(nam1, nam2, child)
- {CTL_##nam1, #nam2, NULL, 0, 0555, child }
- #define DBGENTRY(nam1, nam2)
- {CTL_##nam1##DEBUG, #nam2 "_debug", &nam2##_debug, sizeof(int),
- 0644, NULL, &proc_dodebug}
- static ctl_table debug_table[] = {
- DBGENTRY(RPC, rpc),
- DBGENTRY(NFS, nfs),
- DBGENTRY(NFSD, nfsd),
- DBGENTRY(NLM, nlm),
- {0}
- };
- static ctl_table sunrpc_table[] = {
- DIRENTRY(SUNRPC, sunrpc, debug_table),
- {0}
- };
- #endif