164 строки
3.2 KiB
C
164 строки
3.2 KiB
C
/*
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* linux/net/sunrpc/sysctl.c
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*
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* Sysctl interface to sunrpc module.
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*
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* I would prefer to register the sunrpc table below sys/net, but that's
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* impossible at the moment.
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*/
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#include <linux/types.h>
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#include <linux/linkage.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/sysctl.h>
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#include <linux/module.h>
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#include <asm/uaccess.h>
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#include <linux/sunrpc/types.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/stats.h>
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/*
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* Declare the debug flags here
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*/
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unsigned int rpc_debug;
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EXPORT_SYMBOL_GPL(rpc_debug);
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unsigned int nfs_debug;
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EXPORT_SYMBOL_GPL(nfs_debug);
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unsigned int nfsd_debug;
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EXPORT_SYMBOL_GPL(nfsd_debug);
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unsigned int nlm_debug;
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EXPORT_SYMBOL_GPL(nlm_debug);
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#ifdef RPC_DEBUG
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static struct ctl_table_header *sunrpc_table_header;
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static ctl_table sunrpc_table[];
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void
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rpc_register_sysctl(void)
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{
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if (!sunrpc_table_header)
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sunrpc_table_header = register_sysctl_table(sunrpc_table);
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}
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void
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rpc_unregister_sysctl(void)
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{
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if (sunrpc_table_header) {
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unregister_sysctl_table(sunrpc_table_header);
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sunrpc_table_header = NULL;
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}
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}
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static int
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proc_dodebug(ctl_table *table, int write, struct file *file,
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void __user *buffer, size_t *lenp, loff_t *ppos)
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{
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char tmpbuf[20], c, *s;
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char __user *p;
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unsigned int value;
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size_t left, len;
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if ((*ppos && !write) || !*lenp) {
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*lenp = 0;
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return 0;
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}
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left = *lenp;
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if (write) {
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if (!access_ok(VERIFY_READ, buffer, left))
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return -EFAULT;
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p = buffer;
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while (left && __get_user(c, p) >= 0 && isspace(c))
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left--, p++;
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if (!left)
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goto done;
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if (left > sizeof(tmpbuf) - 1)
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return -EINVAL;
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if (copy_from_user(tmpbuf, p, left))
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return -EFAULT;
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tmpbuf[left] = '\0';
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for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
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value = 10 * value + (*s - '0');
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if (*s && !isspace(*s))
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return -EINVAL;
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while (left && isspace(*s))
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left--, s++;
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*(unsigned int *) table->data = value;
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/* Display the RPC tasks on writing to rpc_debug */
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if (strcmp(table->procname, "rpc_debug") == 0)
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rpc_show_tasks();
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} else {
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if (!access_ok(VERIFY_WRITE, buffer, left))
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return -EFAULT;
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len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
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if (len > left)
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len = left;
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if (__copy_to_user(buffer, tmpbuf, len))
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return -EFAULT;
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if ((left -= len) > 0) {
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if (put_user('\n', (char __user *)buffer + len))
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return -EFAULT;
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left--;
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}
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}
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done:
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*lenp -= left;
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*ppos += *lenp;
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return 0;
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}
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static ctl_table debug_table[] = {
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{
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.procname = "rpc_debug",
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.data = &rpc_debug,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
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},
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{
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.procname = "nfs_debug",
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.data = &nfs_debug,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
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},
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{
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.procname = "nfsd_debug",
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.data = &nfsd_debug,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
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},
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{
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.procname = "nlm_debug",
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.data = &nlm_debug,
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.maxlen = sizeof(int),
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.mode = 0644,
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.proc_handler = &proc_dodebug
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},
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{ .ctl_name = 0 }
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};
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static ctl_table sunrpc_table[] = {
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{
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.ctl_name = CTL_SUNRPC,
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.procname = "sunrpc",
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.mode = 0555,
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.child = debug_table
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},
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{ .ctl_name = 0 }
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};
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#endif
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