+++ /dev/null
-/*
- * Get or set RPC debug flags.
- *
- * I would have loved to write this without recourse to the sysctl
- * interface, but the only plausible approach (reading and writing
- * /dev/kmem at the offsets indicated by the *_debug symbols from
- * /proc/ksyms) didn't work, because /dev/kmem doesn't translate virtual
- * addresses on write. Unfortunately, modules are stuffed into memory
- * allocated via vmalloc.
- *
- * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <unistd.h>
-#include <string.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <nfs/debug.h>
-#include "nfslib.h"
-
-static int verbose = 0;
-static int memfd;
-static off_t flagpos;
-
-static void find_offset(char *module);
-static unsigned int find_flag(char **module, char *name);
-static unsigned int get_flags(void);
-static void set_flags(unsigned int value);
-static void print_flags(char *module, unsigned int flags);
-static void usage(int excode);
-
-int
-main(int argc, char **argv)
-{
- int opt_s = 0,
- opt_c = 0;
- unsigned int flags = 0, oflags;
- char * module = NULL;
- int c;
-
- while ((c = getopt(argc, argv, "chm:sv")) != EOF) {
- switch (c) {
- case 'c':
- opt_c = 1;
- break;
- case 'h':
- usage(0);
- case 'm':
- module = optarg;
- break;
- case 's':
- opt_s = 1;
- break;
- case 'v':
- verbose++;
- break;
- default:
- fprintf(stderr, "rpcdebug: unknown option -%c\n",
- optopt);
- usage(1);
- }
- }
-
- if (opt_c + opt_s > 1) {
- fprintf(stderr, "You can use at most one of -c and -s\n");
- usage(1);
- }
-
- if (argc == optind) {
- flags = ~(unsigned int) 0;
- } else {
- for (; optind < argc; optind++) {
- unsigned int temp;
-
- if (!(temp = find_flag(&module, argv[optind]))) {
- fprintf(stderr, "rpcdebug: unknown flag %s\n",
- argv[optind]);
- exit(1);
- }
- flags |= temp;
- }
- }
-
- if (!module) {
- fprintf(stderr, "rpcdebug: no module name specified, and "
- "could not be inferred.\n");
- usage(1);
- }
-
- if ((memfd = open("/dev/kmem", O_RDWR)) < 0) {
- perror("can't open /dev/mem");
- exit(1);
- }
-
- find_offset(module);
-
- oflags = get_flags();
-
- if (opt_c) {
- set_flags(oflags & ~flags);
- } else if (opt_s) {
- set_flags(oflags | flags);
- } else {
- print_flags(module, oflags);
- }
-
- close(memfd);
- return 0;
-}
-
-#define FLAG(mname, fname) \
- { #mname, #fname, mname##DBG_##fname }
-
-static struct flagmap {
- char * module;
- char * name;
- unsigned int value;
-} flagmap[] = {
- /* rpc */
- FLAG(RPC, XPRT),
- FLAG(RPC, CALL),
- FLAG(RPC, TYPES),
- FLAG(RPC, NFS),
- FLAG(RPC, AUTH),
- FLAG(RPC, PMAP),
- FLAG(RPC, SCHED),
- FLAG(RPC, SVCSOCK),
- FLAG(RPC, SVCDSP),
- FLAG(RPC, MISC),
- FLAG(RPC, ALL),
-
- /* nfs */
- /* currently handled by RPCDBG_NFS */
-
- /* nfsd */
- FLAG(NFSD, SOCK),
- FLAG(NFSD, FH),
- FLAG(NFSD, EXPORT),
- FLAG(NFSD, SVC),
- FLAG(NFSD, PROC),
- FLAG(NFSD, FILEOP),
- FLAG(NFSD, AUTH),
- FLAG(NFSD, REPCACHE),
- FLAG(NFSD, XDR),
- FLAG(NFSD, LOCKD),
- FLAG(NFSD, ALL),
-
- /* lockd */
- FLAG(NLM, SVC),
- FLAG(NLM, CLIENT),
- FLAG(NLM, CLNTLOCK),
- FLAG(NLM, SVCLOCK),
- FLAG(NLM, MONITOR),
- FLAG(NLM, CLNTSUBS),
- FLAG(NLM, SVCSUBS),
- FLAG(NLM, ALL),
-
- { NULL, NULL, 0 }
-};
-
-static unsigned int
-find_flag(char **module, char *name)
-{
- char *mod = *module;
- unsigned int value = 0;
- int i;
-
- for (i = 0; flagmap[i].module; i++) {
- if ((mod && strcasecmp(mod, flagmap[i].module))
- || strcasecmp(name, flagmap[i].name))
- continue;
- if (value) {
- fprintf(stderr,
- "rpcdebug: ambiguous symbol name %s.\n"
- "This name is used by more than one module, "
- "please specify the module name using\n"
- "the -m option.\n",
- name);
- usage(1);
- }
- value = flagmap[i].value;
- if (*module)
- return value;
- mod = flagmap[i].module;
- }
-
- *module = mod;
- return value;
-}
-
-static unsigned int
-get_flags(void)
-{
- unsigned int value;
- int count;
-
- if (lseek(memfd, flagpos, SEEK_SET) < 0) {
- perror("lseek");
- exit(1);
- }
- if ((count = read(memfd, &value, sizeof(value))) < 0) {
- perror("read");
- exit(1);
- }
- if (count != sizeof(value)) {
- fprintf(stderr, "read failed (only %d bytes read)\n",
- count);
- exit(1);
- }
- if (verbose)
- printf("getting flags 0x%x\n", value);
- return value;
-}
-
-static void
-set_flags(unsigned int value)
-{
- int count;
-
- if (verbose)
- printf("setting flags 0x%x\n", value);
- if (lseek(memfd, flagpos, SEEK_SET) < 0) {
- perror("lseek");
- exit(1);
- }
- if ((count = write(memfd, &value, sizeof(value))) < 0) {
- perror("write");
- exit(1);
- }
- if (count != sizeof(value)) {
- fprintf(stderr, "write failed (only %d bytes written)\n",
- count);
- exit(1);
- }
-}
-
-static void
-find_offset(char *module)
-{
- char buffer[512], *sp;
- char symbol[64];
- FILE *fp;
- int len;
-
- len = sprintf(symbol, "%s_debug", module);
-
- if ((fp = fopen("/proc/ksyms", "r")) < 0) {
- perror("rpcdebug: can't open /proc/ksyms");
- exit(1);
- }
-
- while (fgets(buffer, sizeof(buffer), fp) != NULL) {
- if (!(sp = strchr(buffer, ' ')))
- continue;
- if (strncmp(++sp, symbol, len))
- continue;
- if (sp[len] != '\n' && sp[len] != '\t'
- && strncmp(sp+len, "_R", 2))
- continue;
- flagpos = (unsigned long) strtol(buffer, &sp, 16);
- /* printf("position is %lx\n", flagpos); */
- if (sp && *sp == ' ')
- return;
- fprintf(stderr, "rpcdebug: weird line in /proc/ksyms: %s\n",
- buffer);
- exit(1);
- }
-
- fprintf(stderr, "rpcdebug: debug symbol for module %s not found.\n",
- module);
- exit(1);
-}
-
-static char *
-strtolower(char *str)
-{
- static char temp[64];
- char *sp;
-
- strcpy(temp, str);
- for (sp = temp; *sp; sp++)
- *sp = tolower(*sp);
- return temp;
-}
-
-static void
-print_flags(char *module, unsigned int flags)
-{
- char *lastmod = NULL;
- int i;
-
- if (module) {
- printf("%-10s", strtolower(module));
- if (!flags) {
- printf("<no flags set>\n");
- return;
- }
- /* printf(" <%x>", flags); */
- }
-
- for (i = 0; flagmap[i].module; i++) {
- if (module) {
- if (strcasecmp(flagmap[i].module, module))
- continue;
- } else if (!lastmod || strcmp(lastmod, flagmap[i].module)) {
- if (lastmod)
- printf("\n");
- printf("%-10s", strtolower(flagmap[i].module));
- lastmod = flagmap[i].module;
- }
- if (!(flags & flagmap[i].value)
- || (module && !strcasecmp(flagmap[i].name, "all")))
- continue;
- printf(" %s", strtolower(flagmap[i].name));
- }
- printf("\n");
-}
-
-static void
-usage(int excode)
-{
- fprintf(stderr, "usage: rpcdebug [-m module] [-cs] flags ...\n");
- if (verbose) {
- printf("\nModule Valid flags\n");
- print_flags(NULL, ~(unsigned int) 0);
- }
- exit (excode);
-}
-
projects / nfs-utils.git / blobdiff