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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181// SPDX-License-Identifier: GPL-2.0-only/* * linux/net/sunrpc/sysctl.c * * Sysctl interface to sunrpc module. * * I would prefer to register the sunrpc table below sys/net, but that's * impossible at the moment. */
#include <linux/types.h>#include <linux/linkage.h>#include <linux/ctype.h>#include <linux/fs.h>#include <linux/sysctl.h>#include <linux/module.h>
#include <linux/uaccess.h>#include <linux/sunrpc/types.h>#include <linux/sunrpc/sched.h>#include <linux/sunrpc/stats.h>#include <linux/sunrpc/svc_xprt.h>
#include "netns.h"
/* * Declare the debug flags here */unsigned int rpc_debug;EXPORT_SYMBOL_GPL(rpc_debug);
unsigned int nfs_debug;EXPORT_SYMBOL_GPL(nfs_debug);
unsigned int nfsd_debug;EXPORT_SYMBOL_GPL(nfsd_debug);
unsigned int nlm_debug;EXPORT_SYMBOL_GPL(nlm_debug);
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
static int proc_do_xprt(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos){ char tmpbuf[256]; ssize_t len;
if (write || *ppos) { *lenp = 0; return 0; } len = svc_print_xprts(tmpbuf, sizeof(tmpbuf)); len = memory_read_from_buffer(buffer, *lenp, ppos, tmpbuf, len);
if (len < 0) { *lenp = 0; return -EINVAL; } *lenp = len; return 0;}
static intproc_dodebug(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos){ char tmpbuf[20], *s = NULL; char *p; unsigned int value; size_t left, len;
if ((*ppos && !write) || !*lenp) { *lenp = 0; return 0; }
left = *lenp;
if (write) { p = buffer; while (left && isspace(*p)) { left--; p++; } if (!left) goto done;
if (left > sizeof(tmpbuf) - 1) return -EINVAL; memcpy(tmpbuf, p, left); tmpbuf[left] = '\0';
value = simple_strtol(tmpbuf, &s, 0); if (s) { left -= (s - tmpbuf); if (left && !isspace(*s)) return -EINVAL; while (left && isspace(*s)) { left--; s++; } } else left = 0; *(unsigned int *) table->data = value; /* Display the RPC tasks on writing to rpc_debug */ if (strcmp(table->procname, "rpc_debug") == 0) rpc_show_tasks(&init_net); } else { len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data); if (len > left) len = left; memcpy(buffer, tmpbuf, len); if ((left -= len) > 0) { *((char *)buffer + len) = '\n'; left--; } }
done: *lenp -= left; *ppos += *lenp; return 0;}
static struct ctl_table_header *sunrpc_table_header;
static struct ctl_table debug_table[] = { { .procname = "rpc_debug", .data = &rpc_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nfs_debug", .data = &nfs_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nfsd_debug", .data = &nfsd_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "nlm_debug", .data = &nlm_debug, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dodebug }, { .procname = "transports", .maxlen = 256, .mode = 0444, .proc_handler = proc_do_xprt, },};
voidrpc_register_sysctl(void){ if (!sunrpc_table_header) sunrpc_table_header = register_sysctl("sunrpc", debug_table);}
voidrpc_unregister_sysctl(void){ if (sunrpc_table_header) { unregister_sysctl_table(sunrpc_table_header); sunrpc_table_header = NULL; }}#endif