/* remote.c - core analysis suite
*
* Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002, 2003, 2004, 2005, 2009, 2011, 2018 David Anderson
* Copyright (C) 2002, 2003, 2004, 2005, 2009, 2011, 2018 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#include <netinet/in.h>
#include <netdb.h>
#include <net/if_arp.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>
#include <elf.h>
#define FAILMSG "FAIL "
#define DONEMSG "DONE "
#define DATAMSG "DATA "
#define DATA_HDRSIZE (13) /* strlen("XXXX ") + strlen("0131072") + NULL */
#define MAXRECVBUFSIZE (131072)
#define READBUFSIZE (MAXRECVBUFSIZE+DATA_HDRSIZE)
#ifdef DAEMON
/*
* The remote daemon.
*/
static int daemon_init(void);
static ulong daemon_htol(char *);
static int daemon_is_elf_file(char *);
static int daemon_mount_point(char *);
static int daemon_find_booted_kernel(char *);
static char **daemon_build_searchdirs(int);
static int daemon_is_directory(char *);
static int daemon_file_readable(char *);
static int daemon_parse_line(char *, char **);
static char *daemon_clean_line(char *);
int console(char *, ...);
static void daemon_socket_options(int);
static char *no_debugging_symbols_found(char *);
static ulong daemon_filesize(int);
static int daemon_find_module(char *, char *, char *);
static int daemon_search_directory_tree(char *, char *, char *);
static int daemon_file_exists(char *, struct stat *);
static int daemon_checksum(char *, long *);
static void daemon_send(void *, int);
static int daemon_proc_version(char *);
static void handle_connection(int);
struct remote_context {
int sock;
int remdebug;
char *remdebugfile;
} remote_context = { 0, 0, "/dev/null" };
struct remote_context *rc = &remote_context;
int
main(int argc, char **argv)
{
int c, sockfd, newsockfd, clilen;
struct sockaddr_in serv_addr, cli_addr;
struct hostent *hp;
ushort tcp_port;
char hostname[MAXHOSTNAMELEN];
tcp_port = 0;
optind = 0;
while ((c = getopt(argc, argv, "vd:")) > 0) {
switch (c)
{
case 'v':
printf("%s %s\n", basename(argv[0]),
/* BASELEVEL_REVISION */ "(deprecated)");
exit(0);
case 'd':
rc->remdebug++;
rc->remdebugfile = optarg;
break;
}
}
console("<parent daemon %d initiated>\n", getpid());
while (argv[optind]) {
if (!tcp_port)
tcp_port = (ushort)atoi(argv[optind]);
optind++;
}
console("port: %d\n", tcp_port);
if (gethostname(hostname, MAXHOSTNAMELEN) < 0) {
console("gethostname failed: %s\n", strerror(errno));
perror("gethostname");
exit(1);
}
console("hostname: %s\n", hostname);
if ((hp = gethostbyname(hostname)) == NULL) {
console("gethostbyname failed: %s\n", hstrerror(h_errno));
perror("gethostbyname");
exit(1);
}
console("attempting daemon_init...\n");
if (!daemon_init())
exit(1);
console("<daemon %d initiated>\n", getpid());
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
exit(1);
BZERO((char *)&serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
BCOPY(hp->h_addr, (char *)&serv_addr.sin_addr, hp->h_length);
serv_addr.sin_port = htons(tcp_port);
daemon_socket_options(sockfd);
if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0){
console("%d: bind failed: %s\n", getpid(), strerror(errno));
exit(1);
}
if (listen(sockfd, 5) < 0) {
console("%d: listen failed: %s\n", getpid(), strerror(errno));
exit(1);
}
for (;;) {
clilen = sizeof(cli_addr);
if ((newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr,
&clilen)) < 0) {
console("%d: accept failed: %s\n", getpid(),
strerror(errno));
exit(1);
}
switch (fork())
{
case -1: exit(1);
case 0: close(sockfd);
handle_connection(newsockfd);
exit(0);
default:
close(newsockfd);
break;
}
close(newsockfd);
}
}
/*
* This probably doesn't do much, but it might reduce the acknowledge
* negotiations somewhat. (?)
*/
static void
daemon_socket_options(int sockfd)
{
int nodelay;
if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY,
(char *)&nodelay, sizeof(nodelay)) < 0)
console("TCP_NODELAY setsockopt error\n");
}
/*
* This is the child daemon that handles the incoming requests.
*/
#define MAX_REMOTE_FDS (10)
static void
handle_connection(int sock)
{
int i;
char recvbuf[BUFSIZE];
char savebuf[BUFSIZE];
char sendbuf[BUFSIZE];
char buf1[BUFSIZE];
char readbuf[READBUFSIZE+1];
char *file;
FILE *tmp, *pipe;
char *p1, *p2, *p3;
size_t cnt;
int fds[MAX_REMOTE_FDS];
int mfd;
ulong addr, total, reqsize, bufsize;
fd_set rfds;
int len, first, retval, done;
struct stat sbuf;
rc->sock = sock;
console("< new connection >\n");
for (i = 0; i < MAX_REMOTE_FDS; i++)
fds[i] = -1;
while (TRUE) {
FD_ZERO(&rfds);
FD_SET(sock, &rfds);
retval = select(sock+1, &rfds, NULL, NULL, NULL);
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
switch (read(sock, recvbuf, BUFSIZE-1))
{
case -1:
console("[read returned -1]\n");
continue;
case 0:
console("[read returned 0]\n");
return;
default:
console("[%s]: ", recvbuf);
break;
}
if (STRNEQ(recvbuf, "OPEN ")) {
strcpy(sendbuf, recvbuf);
p1 = strtok(recvbuf, " "); /* OPEN */
file = strtok(NULL, " "); /* filename */
for (i = 0; i < MAX_REMOTE_FDS; i++) {
if (fds[i] == -1)
break;
}
if (i < MAX_REMOTE_FDS) {
if ((fds[i] = open(file, O_RDWR)) < 0) {
if ((fds[i] = open(file, O_RDONLY)) < 0)
strcat(sendbuf, " <FAIL>");
else {
sprintf(buf1,
" %d O_RDONLY %ld", fds[i],
daemon_filesize(fds[i]));
strcat(sendbuf, buf1);
}
} else {
sprintf(buf1, " %d O_RDWR %ld", fds[i],
daemon_filesize(fds[i]));
strcat(sendbuf, buf1);
}
} else
strcat(sendbuf, " <FAIL>");
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "READ_LIVE ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_LIVE */
p1 = strtok(NULL, " "); /* filename id */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
addr = daemon_htol(p2);
len = atoi(p3);
mfd = atoi(p1);
errno = 0;
BZERO(readbuf, READBUFSIZE);
if (lseek(mfd, addr, SEEK_SET) == -1)
len = 0;
else if (read(mfd, &readbuf[DATA_HDRSIZE], len) != len)
len = 0;
if (!len) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
} else {
sprintf(readbuf, "%s%07ld", DONEMSG,(ulong)len);
console("(%ld)\n", len);
}
daemon_send(readbuf, len+DATA_HDRSIZE);
continue;
} else if (STRNEQ(recvbuf, "READ_NETDUMP ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_NETDUMP */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
addr = daemon_htol(p2);
len = atoi(p3);
BZERO(readbuf, READBUFSIZE);
errno = 0;
if ((len = read_netdump(UNUSED,
&readbuf[DATA_HDRSIZE], len, UNUSED, addr)) < 0)
len = 0;
if (len) {
sprintf(readbuf, "%s%07ld", DONEMSG,(ulong)len); console("(%ld)\n", (ulong)len);
} else {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
}
daemon_send(readbuf, len+DATA_HDRSIZE);
continue;
} else if (STRNEQ(recvbuf, "READ_MCLXCD ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_MCLXCD */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
addr = daemon_htol(p2);
len = atoi(p3);
errno = 0;
BZERO(readbuf, READBUFSIZE);
if (vas_lseek(addr, SEEK_SET))
len = 0;
else if (vas_read((void *)
&readbuf[DATA_HDRSIZE], len) != len)
len = 0;
if (len) {
sprintf(readbuf, "%s%07ld", DONEMSG,
(ulong)len);
console("(%ld)\n", (ulong)len);
} else {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
}
daemon_send(readbuf, len+DATA_HDRSIZE);
continue;
} else if (STRNEQ(recvbuf, "CLOSE ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* SIZE */
p1 = strtok(NULL, " "); /* filename id */
mfd = atoi(p1);
for (i = retval = 0; i < MAX_REMOTE_FDS; i++) {
if (fds[i] == mfd) {
close(mfd);
fds[i] = -1;
retval = TRUE;
break;
}
}
sprintf(sendbuf, "%s%s", savebuf,
retval ? " OK" : " <FAIL>");
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "READ ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ */
p1 = strtok(NULL, " "); /* filename id */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
addr = daemon_htol(p2);
len = atoi(p3);
mfd = atoi(p1);
BZERO(readbuf, READBUFSIZE);
if (lseek(mfd, addr, SEEK_SET) == -1)
len = 0;
else if (read(mfd, readbuf, len) != len)
len = 0;
if (!len) {
sprintf(readbuf, "%s <FAIL>", savebuf);
len = strlen(readbuf);
console("[%s]\n", readbuf);
} else
console("(%ld)\n", len);
daemon_send(readbuf, len);
continue;
} else if (STRNEQ(recvbuf, "MACHINE_PID")) {
sprintf(sendbuf, "%s %s %d",
recvbuf, MACHINE_TYPE, getpid());
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "TYPE ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* TYPE */
file = strtok(NULL, " "); /* filename */
if (stat(file, &sbuf) < 0)
sprintf(sendbuf, "%s <FAIL>", savebuf);
else if (daemon_is_elf_file(file))
sprintf(sendbuf, "%s ELF", savebuf);
else if (STREQ(file, "/dev/mem"))
sprintf(sendbuf, "%s DEVMEM", savebuf);
else if (is_netdump(file, NETDUMP_REMOTE))
sprintf(sendbuf, "%s NETDUMP", savebuf);
else if (is_mclx_compressed_dump(file))
sprintf(sendbuf, "%s MCLXCD", savebuf);
else if (is_lkcd_compressed_dump(file))
sprintf(sendbuf, "%s LKCD", savebuf);
else if (is_s390_dump(file))
sprintf(sendbuf, "%s S390D", savebuf);
else
sprintf(sendbuf, "%s UNSUPPORTED", savebuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "LINUX_VERSION ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* LINUX_VERSION */
file = strtok(NULL, " "); /* filename */
sprintf(readbuf,
"/usr/bin/strings %s | grep 'Linux version'",
file);
if ((pipe = popen(readbuf, "r"))) {
BZERO(readbuf, BUFSIZE);
if (fread(readbuf, sizeof(char), BUFSIZE-1,
pipe) > 0)
strcpy(sendbuf, readbuf);
else
sprintf(sendbuf, "%s <FAIL>", savebuf);
pclose(pipe);
} else
sprintf(sendbuf, "%s <FAIL>", savebuf);
console("[%s] (%d)\n", sendbuf, strlen(sendbuf));
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "READ_GZIP ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_GZIP */
p1 = strtok(NULL, " "); /* bufsize */
bufsize = atol(p1);
file = strtok(NULL, " "); /* filename */
errno = 0;
reqsize = bufsize - DATA_HDRSIZE;
sprintf(readbuf, "/usr/bin/gzip -c %s", file);
if ((pipe = popen(readbuf, "r")) == NULL) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
daemon_send(readbuf, DATA_HDRSIZE);
continue;
}
errno = cnt = done = total = first = 0;
while (!done) {
BZERO(readbuf, READBUFSIZE);
cnt = fread(&readbuf[DATA_HDRSIZE],
sizeof(char), reqsize, pipe);
total += cnt;
if (feof(pipe)) {
sprintf(readbuf, "%s%07ld",
DONEMSG, (ulong)cnt);
done = TRUE;
} else if (ferror(pipe)) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
done = TRUE;
} else
sprintf(readbuf, "%s%07ld",
DATAMSG, (ulong)cnt);
console("%s[%s]\n", !first++ ? "\n" : "",
readbuf);
daemon_send(readbuf, bufsize);
}
console("GZIP total: %ld\n", total);
pclose(pipe);
continue;
} else if (STRNEQ(recvbuf, "PROC_VERSION")) {
BZERO(readbuf, READBUFSIZE);
if (!daemon_proc_version(readbuf))
sprintf(readbuf, "%s <FAIL>", recvbuf);
console("[%s]\n", readbuf);
daemon_send(readbuf, strlen(readbuf));
continue;
} else if (STRNEQ(recvbuf, "DEBUGGING_SYMBOLS ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* DEBUGGING */
p2 = strtok(NULL, " "); /* filename */
sprintf(sendbuf, "%s %s", savebuf,
no_debugging_symbols_found(p2));
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "PAGESIZE ")) {
if (strstr(recvbuf, "LIVE"))
sprintf(sendbuf, "%s %d", recvbuf,
(uint)getpagesize());
else if (strstr(recvbuf, "NETDUMP"))
sprintf(sendbuf, "%s %d", recvbuf,
(uint)netdump_page_size());
else if (strstr(recvbuf, "MCLXCD"))
sprintf(sendbuf, "%s %d", recvbuf,
(uint)mclx_page_size());
else if (strstr(recvbuf, "LKCD"))
sprintf(sendbuf, "%s %d", recvbuf,
(uint)lkcd_page_size());
else if (strstr(recvbuf, "S390D"))
sprintf(sendbuf, "%s %d", recvbuf,
s390_page_size());
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "FIND_BOOTED_KERNEL")) {
BZERO(readbuf, READBUFSIZE);
if (daemon_find_booted_kernel(readbuf))
sprintf(sendbuf, "%s %s", recvbuf, readbuf);
else
sprintf(sendbuf, "%s <FAIL>", recvbuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "FIND_MODULE ")) {
strcpy(savebuf, recvbuf);
strtok(recvbuf, " "); /* FIND_MODULE */
p1 = strtok(NULL, " "); /* release */
p2 = strtok(NULL, " "); /* module */
if (daemon_find_module(p1, p2, buf1)) {
if (daemon_checksum(buf1, &total))
sprintf(sendbuf, "%s %s %lx",
savebuf, buf1, total);
else
sprintf(sendbuf, "%s %s %lx",
savebuf, buf1,
(ulong)0xdeadbeef);
} else
sprintf(sendbuf, "%s <FAIL>", savebuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "SUM ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* SUM */
p2 = strtok(NULL, " "); /* filename */
if (daemon_checksum(p2, &total))
sprintf(sendbuf, "%s %lx", savebuf, total);
else
sprintf(sendbuf, "%s <FAIL>", savebuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "MEMORY ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* MEMORY */
p2 = strtok(NULL, " "); /* USED or FREE */
p3 = strtok(NULL, " "); /* MCLXCD, LKCD, etc. */
if (STREQ(p2, "FREE")) {
if (STREQ(p3, "NETDUMP"))
retval = netdump_free_memory();
else if (STREQ(p3, "MCLXCD"))
retval = vas_free_memory(NULL);
else if (STREQ(p3, "LKCD"))
retval = lkcd_free_memory();
else if (STREQ(p3, "S390D"))
retval = s390_free_memory();
}
if (STREQ(p2, "USED")) {
if (STREQ(p3, "NETDUMP"))
retval = netdump_memory_used();
else if (STREQ(p3, "MCLXCD"))
retval = vas_memory_used();
else if (STREQ(p3, "LKCD"))
retval = lkcd_memory_used();
else if (STREQ(p3, "S390D"))
retval = s390_memory_used();
}
sprintf(sendbuf, "%s %d", savebuf, retval);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "MEMORY_DUMP")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* MEMORY_DUMP */
p1 = strtok(NULL, " "); /* bufsize */
p2 = strtok(NULL, " "); /* MCLXCD, LKCD, etc. */
bufsize = atol(p1);
reqsize = bufsize - DATA_HDRSIZE;
errno = 0;
if ((tmp = tmpfile()) == NULL) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
daemon_send(readbuf, DATA_HDRSIZE);
continue;
}
if (STREQ(p2, "NETDUMP"))
retval = netdump_memory_dump(tmp);
else if (STREQ(p2, "MCLXCD"))
vas_memory_dump(tmp);
else if (STREQ(p2, "LKCD"))
lkcd_memory_dump(tmp);
else if (STREQ(p2, "LKCD_VERBOSE")) {
set_lkcd_fp(tmp);
dump_lkcd_environment(0);
set_lkcd_fp(NULL);
} else if (STREQ(p2, "S390D"))
s390_memory_dump(tmp);
rewind(tmp);
errno = cnt = done = total = first = 0;
while (!done) {
BZERO(readbuf, READBUFSIZE);
cnt = fread(&readbuf[DATA_HDRSIZE],
sizeof(char), reqsize, tmp);
total += cnt;
if (feof(tmp)) {
sprintf(readbuf, "%s%07ld",
DONEMSG, (ulong)cnt);
done = TRUE;
} else if (ferror(tmp)) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
done = TRUE;
} else
sprintf(readbuf, "%s%07ld",
DATAMSG, (ulong)cnt);
console("%s[%s]\n", !first++ ? "\n" : "",
readbuf);
daemon_send(readbuf, bufsize);
}
console("MEMORY_DUMP total: %ld\n", total);
fclose(tmp);
continue;
} else if (STRNEQ(recvbuf, "NETDUMP_INIT ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* NETDUMP_INIT */
p2 = strtok(NULL, " "); /* fd */
p3 = strtok(NULL, " "); /* dumpfile */
mfd = atoi(p2);
for (i = 0; i < MAX_REMOTE_FDS; i++) {
if (fds[i] == mfd) {
close(mfd);
fds[i] = -1;
break;
}
}
sprintf(sendbuf, "%s %s", savebuf,
netdump_init(p3, NULL) ? "OK" : "<FAIL>");
if ((addr = get_netdump_panic_task())) {
sprintf(readbuf, "\npanic_task: %lx\n", addr);
strcat(sendbuf, readbuf);
}
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "LKCD_DUMP_INIT ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* LKCD_DUMP_INIT */
p2 = strtok(NULL, " "); /* fd */
p3 = strtok(NULL, " "); /* dumpfile */
sprintf(sendbuf, "%s %s", savebuf,
lkcd_dump_init(NULL, atoi(p2), p3) ?
"OK" : "<FAIL>");
if ((addr = get_lkcd_panic_task())) {
sprintf(readbuf, "\npanic_task: %lx\n", addr);
strcat(sendbuf, readbuf);
}
readbuf[0] = NULLCHAR;
get_lkcd_panicmsg(readbuf);
if (strlen(readbuf)) {
strcat(sendbuf, "panicmsg: ");
strcat(sendbuf, readbuf);
}
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "READ_LKCD ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_LKCD */
p1 = strtok(NULL, " "); /* filename id */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
mfd = atoi(p1);
addr = daemon_htol(p2);
len = atoi(p3);
BZERO(readbuf, READBUFSIZE);
errno = 0;
if (!lkcd_lseek(addr))
len = 0;
else if (lkcd_read((void *)
&readbuf[DATA_HDRSIZE], len) != len)
len = 0;
if (len) {
sprintf(readbuf, "%s%07ld", DONEMSG,(ulong)len);
console("(%ld)\n", (ulong)len);
} else {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
}
daemon_send(readbuf, len+DATA_HDRSIZE);
continue;
} else if (STRNEQ(recvbuf, "S390_DUMP_INIT ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* S390_DUMP_INIT */
p2 = strtok(NULL, " "); /* fd */
p3 = strtok(NULL, " "); /* filename */
mfd = atoi(p2);
for (i = 0; i < MAX_REMOTE_FDS; i++) {
if (fds[i] == mfd) {
close(mfd);
fds[i] = -1;
break;
}
}
sprintf(sendbuf, "%s %s", savebuf,
s390_dump_init(p3) ? "OK" : "<FAIL>");
if ((addr = get_s390_panic_task())) {
sprintf(readbuf, "\npanic_task: %lx\n", addr);
strcat(sendbuf, readbuf);
}
readbuf[0] = NULLCHAR;
get_s390_panicmsg(readbuf);
if (strlen(readbuf)) {
strcat(sendbuf, "panicmsg: ");
strcat(sendbuf, readbuf);
}
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "S390X_DUMP_INIT ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* S390X_DUMP_INIT */
p2 = strtok(NULL, " "); /* fd */
p3 = strtok(NULL, " "); /* filename */
mfd = atoi(p2);
for (i = 0; i < MAX_REMOTE_FDS; i++) {
if (fds[i] == mfd) {
close(mfd);
fds[i] = -1;
break;
}
}
sprintf(sendbuf, "%s %s", savebuf,
s390x_dump_init(p3) ? "OK" : "<FAIL>");
if ((addr = get_s390x_panic_task())) {
sprintf(readbuf, "\npanic_task: %lx\n", addr);
strcat(sendbuf, readbuf);
}
readbuf[0] = NULLCHAR;
get_s390x_panicmsg(readbuf);
if (strlen(readbuf)) {
strcat(sendbuf, "panicmsg: ");
strcat(sendbuf, readbuf);
}
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
continue;
} else if (STRNEQ(recvbuf, "READ_S390D ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* READ_S390D */
p1 = strtok(NULL, " "); /* filename id */
p2 = strtok(NULL, " "); /* address */
p3 = strtok(NULL, " "); /* length */
mfd = atoi(p1);
addr = daemon_htol(p2);
len = atoi(p3);
BZERO(readbuf, READBUFSIZE);
errno = 0;
if ((len = read_s390_dumpfile(UNUSED,
&readbuf[DATA_HDRSIZE], len, UNUSED, addr)) < 0)
len = 0;
if (len) {
sprintf(readbuf, "%s%07ld", DONEMSG,(ulong)len);
console("(%ld)\n", (ulong)len);
} else {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
}
daemon_send(readbuf, len+DATA_HDRSIZE);
continue;
} else if (STRNEQ(recvbuf, "EXECUTE ")) {
strcpy(savebuf, recvbuf);
p1 = strtok(recvbuf, " "); /* EXECUTE */
p1 = strtok(NULL, " "); /* bufsize */
p2 = strtok(NULL, " "); /* MCLXCD or LKCD */
p3 = strstr(savebuf, p2);
bufsize = atol(p1);
reqsize = bufsize - DATA_HDRSIZE;
sprintf(readbuf, "echo | %s", p3);
if ((pipe = popen(readbuf, "r")) == NULL) {
BZERO(readbuf, READBUFSIZE);
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
console("[%s]\n", readbuf);
daemon_send(readbuf, bufsize);
continue;
}
errno = cnt = done = total = first = 0;
while (!done) {
BZERO(readbuf, READBUFSIZE);
cnt = fread(&readbuf[DATA_HDRSIZE],
sizeof(char), reqsize, pipe);
total += cnt;
if (feof(pipe)) {
sprintf(readbuf, "%s%07ld",
DONEMSG, (ulong)cnt);
done = TRUE;
} else if (ferror(pipe)) {
sprintf(readbuf, "%s%07ld", FAILMSG,
(ulong)errno);
done = TRUE;
} else
sprintf(readbuf, "%s%07ld",
DATAMSG, (ulong)cnt);
console("%s[%s]\n", !first++ ? "\n" : "",
readbuf);
daemon_send(readbuf, bufsize);
}
console("EXECUTE total: %ld\n", total);
pclose(pipe);
continue;
} else if (STRNEQ(recvbuf, "EXIT")) {
sprintf(sendbuf, "%s OK", recvbuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
return;
} else {
sprintf(sendbuf, "%s <FAIL>", recvbuf);
console("[%s]\n", sendbuf);
daemon_send(sendbuf, strlen(sendbuf));
}
}
}
/*
* Common error-checking send routine.
*/
#define MINSENDSIZE (1448)
static void
daemon_send(void *buffer, int len)
{
int remaining, count, ret;
char *bufptr;
remaining = len;
bufptr = buffer;
while (remaining) {
count = MIN(MINSENDSIZE, remaining);
switch (ret = send(rc->sock, bufptr, count, 0))
{
case -1:
switch (errno)
{
case ENOBUFS:
case ENOMEM:
sleep(1);
continue;
default:
exit(1);
}
break;
default:
remaining -= ret;
bufptr += ret;
break;
}
}
console("daemon_send: sent %d\n", len);
}
/*
* debug print if the -d command line option was used.
*/
int
console(char *fmt, ...)
{
char output[BUFSIZE*2];
va_list ap;
int retval;
FILE *fp;
if (!rc->remdebug || !fmt || !strlen(fmt))
return 0;
va_start(ap, fmt);
(void)vsnprintf(output, BUFSIZE*2, fmt, ap);
va_end(ap);
if ((fp = fopen(rc->remdebugfile, "a")) == NULL)
return 0;
retval = fprintf(fp, "%s", output);
fclose(fp);
return retval;
}
/*
* Fill in the file size of a freshly opened file.
*/
ulong
daemon_filesize(int fd)
{
struct stat sbuf;
if (fstat(fd, &sbuf) == 0)
return(sbuf.st_size);
else
return 0;
}
/*
* Check for gdb output stating "(no debugging symbols found)".
*/
char *
no_debugging_symbols_found(char *file)
{
FILE *pipe;
char buf[BUFSIZE];
sprintf(buf, "echo 'q' | /usr/bin/gdb %s", file);
if ((pipe = popen(buf, "r")) == NULL)
return "NO_GDB";
while (fgets(buf, BUFSIZE, pipe)) {
if (strstr(buf, "(no debugging symbols found)")) {
pclose(pipe);
return "NO_DEBUG";
}
}
pclose(pipe);
return "DEBUG_OK";
}
/*
* Read /proc/version into a buffer.
*/
static int
daemon_proc_version(char *buf)
{
FILE *pipe;
struct stat sbuf;
if (stat("/proc/version", &sbuf) == -1)
return FALSE;
if ((pipe = popen("/bin/cat /proc/version", "r")) == NULL)
return FALSE;
if (fread(buf, sizeof(char),
BUFSIZE-1, pipe) <= 0) {
pclose(pipe);
return FALSE;
}
pclose(pipe);
return TRUE;
}
/*
* c/o W. Richard Stevens...
*/
#define OPEN_MAX_GUESS (256)
static int
daemon_init(void)
{
int i;
pid_t pid;
int open_max;
if ((pid = fork()) < 0)
return FALSE;
else if (pid != 0)
exit(0);
setsid();
chdir("/");
umask(0);
if ((open_max = sysconf(_SC_OPEN_MAX)) < 0)
open_max = OPEN_MAX_GUESS;
for (i = 0; i < open_max; i++)
close(i);
signal(SIGCLD, SIG_IGN);
unsetenv("DISPLAY");
return TRUE;
}
/*
* Determine whether a file is in ELF format by checking the magic number
* in the first EI_NIDENT characters of the file. If it's there, further
* qualify it by doing a "file" operation on it.
*/
static int
daemon_is_elf_file(char *s)
{
int fd, is_elf;
char magic[EI_NIDENT];
char buf[BUFSIZE];
FILE *pipe;
if ((fd = open(s, O_RDONLY)) < 0)
return FALSE;
if (read(fd, magic, EI_NIDENT) != EI_NIDENT) {
close(fd);
return FALSE;
}
close(fd);
magic[EI_CLASS] = NULLCHAR;
if (!STREQ(magic, ELFMAG))
return FALSE;
sprintf(buf, "/usr/bin/file -L %s", s);
if ((pipe = popen(buf, "r")) == NULL) {
console("/usr/bin/strings popen failed\n");
return TRUE;
}
is_elf = FALSE;
while (fgets(buf, BUFSIZE-1, pipe)) {
if (strstr(buf, " ELF ") && strstr(buf, "executable")) {
is_elf = TRUE;
break;
}
}
pclose(pipe);
return is_elf;
}
/*
* Translate ASCII hex addresses.
*/
static ulong
daemon_htol(char *s)
{
long i, j;
ulong n;
if (strlen(s) > MAX_HEXADDR_STRLEN)
exit(1);
for (n = i = 0; s[i] != 0; i++) {
switch (s[i])
{
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
j = (s[i] - 'a') + 10;
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
j = (s[i] - 'A') + 10;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '0':
j = s[i] - '0';
break;
case 'x':
case 'X':
continue;
default:
exit(0);
}
n = (16 * n) + j;
}
return(n);
}
/*
* Adapted from filesys.c, seach the default directories for a kernel
* that matches /proc/version. daemon_build_searchdirs() builds an
* array of directory names.
*/
#define CREATE 1
#define DESTROY 0
#define DEFAULT_SEARCHDIRS 4
static int
daemon_find_booted_kernel(char *namelist)
{
char kernel[BUFSIZE];
char command[BUFSIZE];
char buffer[BUFSIZE];
char proc_version[BUFSIZE];
char *version;
char **searchdirs;
int i;
DIR *dirp;
struct dirent *dp;
FILE *pipe;
int found;
struct stat sbuf;
console("\n");
if (stat("/proc/version", &sbuf) < 0) {
console("/proc/version not found\n");
return FALSE;
}
if (!daemon_proc_version(proc_version)) {
console("cannot read /proc/version\n");
return FALSE;
}
version = proc_version;
searchdirs = daemon_build_searchdirs(CREATE);
for (i = 0, found = FALSE; !found && searchdirs[i]; i++) {
dirp = opendir(searchdirs[i]);
if (!dirp)
continue;
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
sprintf(kernel, "%s%s", searchdirs[i], dp->d_name);
if (daemon_mount_point(kernel) ||
!daemon_file_readable(kernel) ||
!daemon_is_elf_file(kernel))
continue;
sprintf(command, "/usr/bin/strings %s", kernel);
if ((pipe = popen(command, "r")) == NULL) {
console("/usr/bin/strings popen failed\n");
continue;
}
while (fgets(buffer, BUFSIZE-1, pipe)) {
if (STREQ(buffer, version)) {
found = TRUE;
break;
}
}
pclose(pipe);
if (found)
break;
}
closedir(dirp);
}
daemon_mount_point(DESTROY);
daemon_build_searchdirs(DESTROY);
if (found) {
console("booted kernel: %s\n", kernel);
strcpy(namelist, kernel);
return TRUE;
}
console("cannot find booted kernel\n");
return FALSE;
}
static char **
daemon_build_searchdirs(int create)
{
int i;
int cnt;
DIR *dirp;
struct dirent *dp;
char dirbuf[BUFSIZE];
static char **searchdirs = { 0 };
static char *default_searchdirs[DEFAULT_SEARCHDIRS+1] = {
"/usr/src/linux/",
"/boot/",
"/boot/efi/",
"/",
NULL
};
if (!create) {
if (searchdirs) {
for (i = DEFAULT_SEARCHDIRS; searchdirs[i]; i++)
free(searchdirs[i]);
free(searchdirs);
}
return NULL;
}
cnt = DEFAULT_SEARCHDIRS;
if ((dirp = opendir("/usr/src"))) {
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
cnt++;
if ((searchdirs = (char **)malloc(cnt * sizeof(char *)))
== NULL) {
console("/usr/src/ directory list malloc failed: %s\n",
strerror(errno));
closedir(dirp);
return default_searchdirs;
}
for (i = 0; i < DEFAULT_SEARCHDIRS; i++)
searchdirs[i] = default_searchdirs[i];
cnt = DEFAULT_SEARCHDIRS;
rewinddir(dirp);
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
if (STREQ(dp->d_name, "linux") ||
STREQ(dp->d_name, ".") ||
STREQ(dp->d_name, ".."))
continue;
sprintf(dirbuf, "/usr/src/%s", dp->d_name);
if (daemon_mount_point(dirbuf))
continue;
if (!daemon_is_directory(dirbuf))
continue;
if ((searchdirs[cnt] = (char *)
malloc(strlen(dirbuf)+2)) == NULL) {
console("/usr/src/ directory entry malloc failed: %s\n",
strerror(errno));
break;
}
sprintf(searchdirs[cnt], "%s/", dirbuf);
cnt++;
}
searchdirs[cnt] = NULL;
closedir(dirp);
}
for (i = 0; searchdirs[i]; i++)
console("searchdirs[%d]: %s\n", i, searchdirs[i]);
return searchdirs;
}
/*
* Determine whether a file is a mount point, without the benefit of stat().
* This horrendous kludge is necessary to avoid uninterruptible stat() or
* fstat() calls on nfs mount-points where the remote directory is no longer
* available.
*/
static int
daemon_mount_point(char *name)
{
int i;
static int mount_points_gathered = -1;
static char **mount_points;
char *arglist[MAXARGS];
char buf[BUFSIZE];
char cmd[BUFSIZE];
int argc, found;
struct stat sbuf;
FILE *pipe;
/*
* The first time through, stash a list of mount points.
*/
if (mount_points_gathered < 0) {
found = mount_points_gathered = 0;
if (stat("/proc/mounts", &sbuf) == 0)
sprintf(cmd, "/bin/cat /proc/mounts");
else if (stat("/etc/mtab", &sbuf) == 0)
sprintf(cmd, "/bin/cat /etc/mtab");
else
return FALSE;
if ((pipe = popen(cmd, "r")) == NULL)
return FALSE;
while (fgets(buf, BUFSIZE, pipe)) {
argc = daemon_parse_line(buf, arglist);
if (argc < 2)
continue;
found++;
}
pclose(pipe);
if (!(mount_points = (char **)malloc(sizeof(char *) * found)))
return FALSE;
if ((pipe = popen(cmd, "r")) == NULL)
return FALSE;
i = 0;
while (fgets(buf, BUFSIZE, pipe) &&
(mount_points_gathered < found)) {
argc = daemon_parse_line(buf, arglist);
if (argc < 2)
continue;
if ((mount_points[i] = (char *)
malloc(strlen(arglist[1])*2))) {
strcpy(mount_points[i], arglist[1]);
mount_points_gathered++, i++;
}
}
pclose(pipe);
}
/*
* A null name string means we're done with this routine forever,
* so the malloc'd memory can be freed.
*/
if (!name) {
for (i = 0; i < mount_points_gathered; i++)
free(mount_points[i]);
free(mount_points);
return FALSE;
}
for (i = 0; i < mount_points_gathered; i++) {
if (STREQ(name, mount_points[i]))
return TRUE;
}
return FALSE;
}
/*
* Check whether a file is a directory.
*/
static int
daemon_is_directory(char *file)
{
struct stat sbuf;
if (!file || !strlen(file))
return(FALSE);
if (stat(file, &sbuf) == -1)
return(FALSE); /* This file doesn't exist. */
return((sbuf.st_mode & S_IFMT) == S_IFDIR ? TRUE : FALSE);
}
/*
* Check whether a file is readable.
*/
static int
daemon_file_readable(char *file)
{
struct stat sbuf;
long tmp;
int fd;
if (stat(file, &sbuf) < 0)
return FALSE;
if ((fd = open(file, O_RDONLY)) < 0)
return FALSE;
if (read(fd, &tmp, sizeof(tmp)) != sizeof(tmp)) {
close(fd);
return FALSE;
}
close(fd);
return TRUE;
}
/*
* Parse a line into tokens, populate the passed-in argv[] array, and return
* the count of arguments found. This function modifies the passed-string
* by inserting a NULL character at the end of each token. Expressions
* encompassed by parentheses, and strings encompassed by apostrophes, are
* collected into single tokens.
*/
int
daemon_parse_line(char *str, char *argv[])
{
int i, j;
int string;
int expression;
for (i = 0; i < MAXARGS; i++)
argv[i] = NULL;
daemon_clean_line(str);
if (str == NULL || strlen(str) == 0)
return(0);
i = j = 0;
string = expression = FALSE;
argv[j++] = str;
while (TRUE) {
if (j == MAXARGS) {
console("too many arguments in string!\n");
return 0;
}
while (str[i] != ' ' && str[i] != '\t' && str[i] != NULLCHAR) {
i++;
}
switch (str[i])
{
case ' ':
case '\t':
str[i++] = NULLCHAR;
if (str[i] == '"') {
str[i] = ' ';
string = TRUE;
i++;
}
if (str[i] == '(') {
expression = TRUE;
}
while (str[i] == ' ' || str[i] == '\t') {
i++;
}
if (str[i] != NULLCHAR && str[i] != '\n') {
argv[j++] = &str[i];
if (string) {
string = FALSE;
while (str[i] != '"' && str[i] != NULLCHAR)
i++;
if (str[i] == '"')
str[i] = ' ';
}
if (expression) {
expression = FALSE;
while (str[i] != ')' && str[i] != NULLCHAR)
i++;
}
break;
}
/* else fall through */
case '\n':
str[i] = NULLCHAR;
/* keep falling... */
case NULLCHAR:
argv[j] = NULLCHAR;
return(j);
}
}
}
/*
* Strip line-beginning and line-ending whitespace and linefeeds.
*/
char *strip_linefeeds(char *line)
{
return(daemon_clean_line(line));
}
static char *
daemon_clean_line(char *line)
{
char buf[BUFSIZE];
char *p;
if (line == NULL || strlen(line) == 0)
return(line);
strcpy(buf, line);
p = &buf[0];
while (*p == ' ' || *p == '\t')
p++;
strcpy(line, p);
if (line == NULL || strlen(line) == 0)
return(line);
p = &LASTCHAR(line);
while (*p == '\n')
*p = NULLCHAR;
if (line == NULL || strlen(line) == 0)
return(line);
p = &LASTCHAR(line);
while (*p == ' ' || *p == '\t') {
*p = NULLCHAR;
if (p == line)
break;
p--;
}
return(line);
}
/*
* Service not offered by the daemon.
*/
int
monitor_memory(long *a1, long *a2, long *a3, long *a4)
{
return FALSE;
}
static int
daemon_find_module(char *release, char *filename, char *retbuf)
{
char dir[BUFSIZE];
int found;
found = FALSE;
sprintf(dir, "%s/%s", DEFAULT_REDHAT_DEBUG_LOCATION, release);
found = daemon_search_directory_tree(dir, filename, retbuf);
if (!found) {
sprintf(dir, "/lib/modules/%s", release);
found = daemon_search_directory_tree(dir, filename, retbuf);
}
return found;
}
int
daemon_search_directory_tree(char *directory, char *file, char *retbuf)
{
char command[BUFSIZE];
char buf[BUFSIZE];
FILE *pipe;
int found;
if (!daemon_file_exists("/usr/bin/find", NULL) ||
!daemon_file_exists("/bin/echo", NULL) ||
!daemon_is_directory(directory))
return FALSE;
sprintf(command,
"/usr/bin/find %s -name %s -print; /bin/echo search done",
directory, file);
if ((pipe = popen(command, "r")) == NULL)
return FALSE;
found = FALSE;
while (fgets(buf, BUFSIZE-1, pipe) || !found) {
if (STREQ(buf, "search done\n"))
break;
if (!found &&
STREQ((char *)basename(strip_linefeeds(buf)), file)) {
strcpy(retbuf, buf);
found = TRUE;
}
}
pclose(pipe);
return found;
}
static int
daemon_file_exists(char *file, struct stat *sp)
{
struct stat sbuf;
if (stat(file, sp ? sp : &sbuf) == 0)
return TRUE;
return FALSE;
}
static int
daemon_checksum(char *file, long *retsum)
{
int i;
int fd;
ssize_t cnt;
char buf[MIN_PAGE_SIZE];
long csum;
if ((fd = open(file, O_RDONLY)) < 0)
return FALSE;
csum = 0;
BZERO(buf, MIN_PAGE_SIZE);
while ((cnt = read(fd, buf, MIN_PAGE_SIZE)) > 0) {
for (i = 0; i < cnt; i++)
csum += buf[i];
BZERO(buf, MIN_PAGE_SIZE);
}
close(fd);
*retsum = csum;
return TRUE;
}
#else
static void copy_to_local_namelist(struct remote_file *);
static char *create_local_namelist(struct remote_file *);
static int remote_find_booted_kernel(struct remote_file *);
static int remote_proc_version(char *);
static int validate_phys_base(physaddr_t, physaddr_t, physaddr_t);
static int remote_file_open(struct remote_file *);
static int remote_file_close(struct remote_file *);
static int identical_namelist(char *, struct remote_file *);
void remote_socket_options(int);
static int copy_remote_file(struct remote_file *, int, char *, char *);
static void copy_remote_gzip_file(struct remote_file *, char *, char *);
static int remote_file_checksum(struct remote_file *);
static int remote_file_type(char *);
static int remote_lkcd_dump_init(void);
static int remote_s390_dump_init(void);
static int remote_netdump_init(void);
static int remote_tcp_read(int, const char *, size_t);
static int remote_tcp_read_string(int, const char *, size_t, int);
static int remote_tcp_write(int, const void *, size_t);
static int remote_tcp_write_string(int, const char *);
struct _remote_context {
uint flags;
int n_cpus;
int vfd;
char remote_type[10];
} remote_context;
#define NIL_FLAG (0x01U)
#define NIL_MODE() (rc->flags & NIL_FLAG)
struct _remote_context *rc = &remote_context;
/*
* Parse, verify and establish a connection with the network daemon
* specified on the crash command line.
*
* The format is: [remote-hostname]:port[,remote-namelist][,remote-dumpfile]
*
* where everything but the port number is optional, and the remote-namelist
* and remote-dumpfile can be reversed.
*
* 1. The default remote host is the local host.
* 2. The default dumpfile is /dev/mem.
* 3. If no remote-namelist and remote-dumpfile are given, the daemon
* is queried for a kernel that matches the remote /proc/version.
* If no local kernel namelist is entered, the remote version will
* be copied locally when fd_init() is called.
* 4. If a remote-dumpfile is given with no remote namelist, it is presumed
* that the kernel namelist will be entered locally.
*/
int
is_remote_daemon(char *dp)
{
char *p1;
static char defaulthost[MAXHOSTNAMELEN+1];
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *portp, *filep, *file1, *file2;
struct hostent *hp;
struct sockaddr_in serv_addr;
if (!strstr(dp, ":") || file_exists(dp, NULL))
return FALSE;
pc->port = 0;
pc->server = pc->server_memsrc = NULL;
rc->vfd = pc->rmfd = pc->rkfd = -1;
file1 = file2 = NULL;
if ((filep = strstr(dp, ","))) {
*filep = NULLCHAR;
filep++;
}
if (*dp == ':') {
BZERO(defaulthost, MAXHOSTNAMELEN+1);
gethostname(defaulthost, MAXHOSTNAMELEN);
pc->server = defaulthost;
portp = dp+1;
} else {
pc->server = strtok(dp, ":");
portp = strtok(NULL, ":");
}
if (portp == NULL)
return FALSE;
if (decimal(portp, 0))
pc->port = (ushort)atoi(portp);
else
return FALSE;
if (filep) {
file1 = strtok(filep, ",");
file2 = strtok(NULL, ",");
}
if (!pc->server || !pc->port)
return FALSE;
if (CRASHDEBUG(1)) {
fprintf(fp, "server: [%s]\n", pc->server);
fprintf(fp, " port: [%d]\n", pc->port);
fprintf(fp, " file1: [%s]\n", file1);
fprintf(fp, " file2: [%s]\n", file2);
}
if ((hp = gethostbyname(pc->server)) == NULL) {
herror(pc->server);
error(FATAL, "gethostbyname [%s] failed\n", pc->server);
}
if (CRASHDEBUG(1)) {
struct in_addr *ip;
char **listptr;
listptr = hp->h_addr_list;
while ((ip = (struct in_addr *) *listptr++) != NULL)
printf("%s\n", inet_ntoa(*ip));
}
if ((pc->sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
error(FATAL, "socket call failed\n");
}
BZERO((char *)&serv_addr, sizeof(struct sockaddr_in));
serv_addr.sin_family = AF_INET;
BCOPY(hp->h_addr, (char *)&serv_addr.sin_addr, hp->h_length);
serv_addr.sin_port = htons(pc->port);
if (connect(pc->sockfd, (struct sockaddr *)&serv_addr,
sizeof(struct sockaddr_in)) < 0) {
herror(hp->h_name);
error(FATAL, "connect [%s:%d] failed\n", hp->h_name, pc->port);
clean_exit(1);
}
if (CRASHDEBUG(1))
printf("connect [%s:%d]: success\n", hp->h_name, pc->port);
remote_socket_options(pc->sockfd);
/*
* Try and use NIL mode.
*/
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "NIL");
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, 0);
if (!strstr(recvbuf, "<FAIL>")) {
rc->flags |= NIL_FLAG;
p1 = strtok(recvbuf, " "); /* NIL */
p1 = strtok(NULL, " "); /* remote type */
if (p1 && p1[0] != 'L')
pc->flags2 |= REM_PAUSED_F;
}
/*
* Get the remote machine type and verify a match. The daemon pid
* is also used as a live system initial context.
*/
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "MACHINE_PID");
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
p1 = strtok(recvbuf, " "); /* MACHINE */
p1 = strtok(NULL, " "); /* machine type */
if (CRASHDEBUG(1))
printf("remote MACHINE: %s\n", p1);
if (!STREQ(pc->machine_type, p1))
error(FATAL, "machine type mismatch: local: %s remote: %s\n",
pc->machine_type, p1);
p1 = strtok(NULL, " "); /* pid */
pc->server_pid = atol(p1);
if (file1) {
switch (remote_file_type(file1))
{
case TYPE_ELF:
pc->server_namelist = file1;
break;
case TYPE_NETDUMP:
pc->server_memsrc = file1;
pc->flags |= REM_NETDUMP;
break;
case TYPE_MCLXCD:
pc->server_memsrc = file1;
pc->flags |= REM_MCLXCD;
break;
case TYPE_DEVMEM:
pc->server_memsrc = file1;
break;
case TYPE_LKCD:
pc->server_memsrc = file1;
pc->flags |= REM_LKCD;
break;
case TYPE_S390D:
pc->server_memsrc = file1;
pc->flags |= REM_S390D;
break;
}
}
if (file2) {
switch (remote_file_type(file2))
{
case TYPE_ELF:
if (pc->server_namelist)
error(FATAL,
"two remote namelists entered: %s and %s\n",
file1, file2);
pc->server_namelist = file2;
break;
case TYPE_NETDUMP:
if (pc->server_memsrc)
error(FATAL,
"neither %s or %s is an ELF file\n",
file1, file2);
pc->server_memsrc = file2;
pc->flags |= REM_NETDUMP;
break;
case TYPE_MCLXCD:
if (pc->server_memsrc)
error(FATAL,
"neither %s or %s is an ELF file\n",
file1, file2);
pc->server_memsrc = file2;
pc->flags |= REM_MCLXCD;
break;
case TYPE_LKCD:
if (pc->server_memsrc)
error(FATAL,
"neither %s or %s is an ELF file\n",
file1, file2);
pc->server_memsrc = file2;
pc->flags |= REM_LKCD;
break;
case TYPE_S390D:
if (pc->server_memsrc)
error(FATAL,
"neither %s or %s is an ELF file\n",
file1, file2);
pc->server_memsrc = file2;
pc->flags |= REM_S390D;
break;
case TYPE_DEVMEM:
pc->server_memsrc = file2;
break;
}
}
return TRUE;
}
/*
* Determine whether a file is a kernel or a memory source.
*/
static int
remote_file_type(char *file)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "TYPE %s", file);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>"))
error(FATAL, "invalid remote file name: %s\n", file);
else if (strstr(recvbuf, " UNSUPPORTED"))
error(FATAL, "unsupported remote file type: %s\n", file);
else if (strstr(recvbuf, " NETDUMP"))
return TYPE_NETDUMP;
else if (strstr(recvbuf, " ELF"))
return TYPE_ELF;
else if (strstr(recvbuf, " MCLXCD"))
return TYPE_MCLXCD;
else if (strstr(recvbuf, " DEVMEM"))
return TYPE_DEVMEM;
else if (strstr(recvbuf, " LKCD"))
return TYPE_LKCD;
else if (strstr(recvbuf, " S390D"))
return TYPE_S390D;
return (error(FATAL, "unknown remote file type: %s\n", file));
}
/*
* Try to set the receive buffer size to READBUFSIZE with setsockopt(),
* storing the value returned by getsockopt() after the attempt is made.
* Then enforce a SO_RCVLOWAT (low water mark) of 1, to ensure that error
* recovery won't get hung in the recv() call in remote_clear_pipeline().
*/
void
remote_socket_options(int sockfd)
{
int rcvbuf, optlen;
pc->rcvbufsize = rcvbuf = READBUFSIZE;
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, (char *)&rcvbuf,
sizeof(rcvbuf)) < 0) {
error(INFO, "SO_RCVBUF setsockopt error\n");
return;
}
optlen = sizeof(rcvbuf);
if (getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, (char *)&rcvbuf,
(socklen_t *)&optlen) < 0) {
error(INFO, "SO_RCVBUF getsockopt error\n");
return;
}
if (CRASHDEBUG(1))
printf("socket SO_RCVBUF size: %d\n", rcvbuf);
rcvbuf = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVLOWAT, (char *)&rcvbuf,
sizeof(rcvbuf)) < 0) {
/*
* Earlier versions of Linux TCP won't accept this option,
* which is hardcoded to the desired count of 1 anyway.
* Set it to 0, and verify it as 1 in the getsockopt() call.
*/
if (CRASHDEBUG(1))
error(INFO, "SO_RCVLOWAT setsockopt error: %s\n",
strerror(errno));
rcvbuf = 0;
}
optlen = sizeof(rcvbuf);
if (getsockopt(sockfd, SOL_SOCKET, SO_RCVLOWAT, (char *)&rcvbuf,
(socklen_t *)&optlen) < 0) {
error(INFO, "SO_RCVLOWAT getsockopt error\n");
return;
}
if (CRASHDEBUG(1) || (rcvbuf != 1))
error(INFO, "socket SO_RCVLOWAT value: %d\n", rcvbuf);
}
/*
* Wrapper around recv to read full length packet.
*/
static int
remote_tcp_read(int sock, const char *pv_buffer, size_t cb_buffer)
{
size_t cb_total = 0;
do
{
ssize_t cb_read = recv(sock, (void*)pv_buffer, cb_buffer, MSG_NOSIGNAL);
if (cb_read <= 0)
return cb_read;
cb_total += cb_read;
cb_buffer -= cb_read;
pv_buffer = (char *)pv_buffer + cb_read;
} while (cb_buffer);
return cb_total;
}
/*
* Wrapper around recv to read full string packet.
*/
static int
remote_tcp_read_string(int sock, const char *pv_buffer, size_t cb_buffer, int nil_mode)
{
size_t cb_total = 0;
do
{
ssize_t cb_read = recv(sock, (void*)pv_buffer, cb_buffer, MSG_NOSIGNAL);
if (cb_read <= 0)
return cb_read;
cb_total += cb_read;
if (!nil_mode && cb_total >= 4)
return cb_total;
if (!pv_buffer[cb_read - 1])
return cb_total;
cb_buffer -= cb_read;
pv_buffer = (char *)pv_buffer + cb_read;
} while (cb_buffer);
return cb_total;
}
/*
* Wrapper around send to send full packet.
*/
static int
remote_tcp_write(int sock, const void *pv_buffer, size_t cb_buffer)
{
do
{
size_t cb_now = cb_buffer;
ssize_t cb_written = send(sock, (const char *)pv_buffer, cb_now, MSG_NOSIGNAL);
if (cb_written < 0)
return 1;
cb_buffer -= cb_written;
pv_buffer = (char *)pv_buffer + cb_written;
} while (cb_buffer);
return 0;
}
/*
* Wrapper around tcp_write to send a string
*/
static int
remote_tcp_write_string(int sock, const char *pv_buffer)
{
return remote_tcp_write(sock, pv_buffer, strlen(pv_buffer) + 1);
}
/*
* Request that the daemon open a file.
*/
static int
remote_file_open(struct remote_file *rfp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "OPEN %s", rfp->filename);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (CRASHDEBUG(1))
fprintf(fp, "remote_file_open: [%s]\n", recvbuf);
if (strstr(recvbuf, "O_RDWR") || strstr(recvbuf, "O_RDONLY")) {
p1 = strtok(recvbuf, " "); /* OPEN */
p1 = strtok(NULL, " "); /* filename */
p1 = strtok(NULL, " "); /* fd */
rfp->fd = atoi(p1);
p1 = strtok(NULL, " "); /* flags */
if (STREQ(p1, "O_RDWR"))
rfp->flags |= O_RDWR;
else if (STREQ(p1, "O_RDONLY"))
rfp->flags |= O_RDONLY;
p1 = strtok(NULL, " "); /* size */
rfp->size = atoi(p1);
return TRUE;
} else
return FALSE;
}
/*
* Request that the daemon close a previously-opened file.
*/
static int
remote_file_close(struct remote_file *rfp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "CLOSE %d", rfp->fd);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
return (strstr(recvbuf, "OK") ? TRUE : FALSE);
}
/*
* Get a copy of the daemon machine's /proc/version
*/
static int
remote_proc_version(char *buf)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "PROC_VERSION");
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (STREQ(recvbuf, "<FAIL>")) {
buf[0] = 0;
return FALSE;
}
strcpy(buf, recvbuf);
return TRUE;
}
/*
* Check that virt_phys_base when accessed via
* phys_base - text_start is phys_base.
*/
static int
validate_phys_base(physaddr_t phys_base, physaddr_t text_start, physaddr_t virt_phys_base)
{
ulong value;
if (CRASHDEBUG(3))
fprintf(fp, "validate_phys_base: virt_phys_base=0x%llx phys_base=0x%llx text_start=0x%llx calc=0x%llx\n",
(long long unsigned int)virt_phys_base,
(long long unsigned int)phys_base,
(long long unsigned int)text_start,
(long long unsigned int)virt_phys_base + phys_base - text_start);
if (READMEM(pc->rmfd, (void*)&value, sizeof(value),
virt_phys_base, virt_phys_base + phys_base - text_start)
== sizeof(value)) {
if (value == phys_base)
return 1;
}
return 0;
}
/*
* Get remote phys_base based on virtual address of "phys_base".
*/
physaddr_t
get_remote_phys_base(physaddr_t text_start, physaddr_t virt_phys_base)
{
int vcpu;
ulong value;
if (rc->vfd < 0) {
struct remote_file remote_file, *rfp;
rfp = &remote_file;
BZERO(rfp, sizeof(struct remote_file));
rfp->filename = "/dev/vmem";
if (remote_file_open(rfp)) {
rc->vfd = rfp->fd;
} else
return 0;
}
for (vcpu = 0; vcpu < rc->n_cpus; vcpu++)
if (remote_memory_read(rc->vfd, (void*)&value, sizeof(value),
virt_phys_base, vcpu) == sizeof(value)) {
if (validate_phys_base(value, text_start, virt_phys_base))
return value;
}
return 0;
}
/*
* Do a remote VTOP if supported.
*/
physaddr_t
remote_vtop(int cpu, physaddr_t virt_addr)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1;
int errflag;
ulong value;
if (!rc->remote_type[0])
return 0; /* Not a special remote. */
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "VTOP %d %llx", cpu, (long long unsigned int)virt_addr);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (CRASHDEBUG(2))
fprintf(fp, "remote_vtop: [%s]\n", recvbuf);
if (strstr(recvbuf, "<FAIL>"))
error(FATAL, "remote_vtop for CPU %d\n", cpu);
p1 = strtok(recvbuf, " "); /* VTOP */
p1 = strtok(NULL, " "); /* cpu */
p1 = strtok(NULL, " "); /* vaddr */
p1 = strtok(NULL, " "); /* paddr */
errflag = 0;
value = htol(p1, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag) {
return value;
}
return 0;
}
/*
* Get a copy of the daemon machine cpu regs.
*/
int
get_remote_regs(struct bt_info *bt, ulong *eip, ulong *esp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1, *p2;
int errflag;
ulong value;
if (!rc->remote_type[0])
return 0; /* Not a special remote. */
*eip = 0;
*esp = 0;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "FETCH_LIVE_IP_SP_BP %d", bt->tc->processor);
if (remote_tcp_write_string(pc->sockfd, sendbuf))
return 0;
errflag = remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (errflag <= 0)
return 0;
if (CRASHDEBUG(1))
fprintf(fp, "get_remote_regs(cpu=%d): [%s]\n",
bt->tc->processor, recvbuf);
if (strstr(recvbuf, "<FAIL>")) {
error(INFO, "get_remote_regs for CPU %d\n", bt->tc->processor);
return 0;
}
p1 = strtok(recvbuf, " "); /* FETCH_LIVE_IP_SP_BP */
p1 = strtok(NULL, " "); /* cpu */
p1 = strtok(NULL, ":"); /* cs */
p1 = strtok(NULL, " "); /* ip */
p2 = strtok(NULL, ":"); /* ss */
p2 = strtok(NULL, " "); /* sp */
/* p2 = strtok(NULL, " "); bp */
errflag = 0;
value = htol(p1, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag) {
*eip = value;
}
errflag = 0;
value = htol(p2, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag) {
*esp = value;
}
return 1;
}
/*
* Get a remote cr3 if supported.
*/
physaddr_t
get_remote_cr3(int cpu)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1;
int errflag;
ulong value;
if (!rc->remote_type[0])
return 0; /* Not a special remote. */
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "FETCH_LIVE_CR3 %d", cpu);
if (remote_tcp_write_string(pc->sockfd, sendbuf))
return 0;
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (CRASHDEBUG(1))
fprintf(fp, "get_remote_cr3: [%s]\n", recvbuf);
if (strstr(recvbuf, "<FAIL>"))
error(FATAL, "get_remote_cr3 for CPU %d\n", cpu);
p1 = strtok(recvbuf, " "); /* FETCH_LIVE_CR3 */
p1 = strtok(NULL, " "); /* cpu */
p1 = strtok(NULL, " "); /* cr3 */
errflag = 0;
value = htol(p1, RETURN_ON_ERROR|QUIET, &errflag);
if (!errflag)
return value;
return 0;
}
/*
*
* Set up the file descriptors and file name strings if they haven't
* been set up before:
*
* 1. pc->namelist must be set to a local kernel namelist, which will be
* copied from the remote machine if it was not specified.
*
* 2. pc->dumpfile will never be set for a remote operation, because there
* is no difference to readmem().
*
* 3. pc->server_namelist may be set if it has to be copied across.
*
* 4. pc->server_memsrc will be set to either /dev/mem or the dumpfile.
*/
void
remote_fd_init(void)
{
char filename[BUFSIZE];
struct remote_file remote_file, *rfp;
rfp = &remote_file;
if (pc->namelist && pc->server_namelist) {
error(INFO, "too many namelists\n");
program_usage(SHORT_FORM);
}
if ((pc->namelist || pc->server_namelist) &&
pc->namelist_debug && pc->system_map) {
error(INFO,
"too many namelist options:\n %s\n %s\n %s\n",
pc->namelist ?
pc->namelist : pc->server_namelist,
pc->namelist_debug,
pc->system_map);
program_usage(SHORT_FORM);
}
/*
* Account for the remote possibility of a local dumpfile
* being entered on the command line.
*/
if (pc->flags & MEMORY_SOURCES) {
if (pc->server_memsrc) {
error(INFO, "too many dumpfile/memory arguments\n");
program_usage(SHORT_FORM);
}
pc->flags2 |= MEMSRC_LOCAL;
if (pc->flags & (DEVMEM|MEMMOD)) {
if (!get_proc_version())
error(INFO, "/proc/version: %s\n",
strerror(errno));
pc->flags |= LIVE_SYSTEM;
}
} else {
/*
* First open the remote memory source, defaulting to /dev/mem
* if no remote dumpfile name was entered. If it is /dev/mem,
* then also go get the remote /proc/version.
*/
pc->readmem = read_daemon;
if (!pc->server_memsrc)
pc->server_memsrc = "/dev/mem";
if (STREQ(pc->server_memsrc, "/dev/mem"))
pc->flags |= REM_LIVE_SYSTEM;
BZERO(rfp, sizeof(struct remote_file));
rfp->filename = pc->server_memsrc;
if (remote_file_open(rfp)) {
pc->rmfd = rfp->fd;
if (rfp->flags & O_RDWR)
pc->flags |= MFD_RDWR;
if (BITS32() && REMOTE_ACTIVE()) {
BZERO(rfp, sizeof(struct remote_file));
rfp->filename = "/dev/kmem";
if (remote_file_open(rfp))
pc->rkfd = rfp->fd;
}
if ((pc->flags & REM_NETDUMP) &&
!remote_netdump_init())
error(FATAL,
"%s: remote initialization failed\n",
pc->server_memsrc);
if ((pc->flags & REM_LKCD) &&
!remote_lkcd_dump_init())
error(FATAL,
"%s: remote initialization failed\n",
pc->server_memsrc);
if ((pc->flags & REM_S390D) &&
!remote_s390_dump_init())
error(FATAL,
"%s: remote initialization failed\n",
pc->server_memsrc);
if (REMOTE_DUMPFILE())
pc->writemem = write_daemon;
} else
error(FATAL, "cannot open remote memory source: %s\n",
pc->server_memsrc);
if (REMOTE_ACTIVE() && !remote_proc_version(kt->proc_version))
error(WARNING,
"daemon cannot access /proc/version\n\n");
}
/*
* If a local namelist was entered, check whether it's readable.
* If a server namelist was entered, copy it across.
* If no server namelist was entered, query the daemon for it,
* and if found, copy it across,
*/
if (pc->namelist) {
if ((pc->nfd = open(pc->namelist, O_RDONLY)) < 0)
error(FATAL, "%s: %s\n", pc->namelist, strerror(errno));
close(pc->nfd);
pc->nfd = -1;
pc->flags |= NAMELIST_LOCAL;
} else if (pc->server_namelist) {
BZERO(rfp, sizeof(struct remote_file));
rfp->filename = pc->server_namelist;
if (!remote_file_open(rfp)) {
error(FATAL, "daemon cannot open: %s\n",
pc->server_namelist);
}
copy_to_local_namelist(rfp);
remote_file_close(rfp);
} else {
BZERO(rfp, sizeof(struct remote_file));
BZERO(filename, BUFSIZE);
rfp->filename = filename;
if (!remote_find_booted_kernel(rfp))
error(FATAL,
"remote daemon cannot find booted kernel\n");
if (!remote_file_open(rfp))
error(FATAL, "remote daemon cannot open: %s\n",
pc->server_namelist);
copy_to_local_namelist(rfp);
remote_file_close(rfp);
}
if (REMOTE_ACTIVE())
pc->flags |= LIVE_SYSTEM;
}
/*
* Copy a remote kernel to a local file, which gets unlinked in the normal
* course of events. However, the pc->nfd file descriptor will be kept
* alive in case there's a command put in place to keep the file around.
*/
static void
copy_to_local_namelist(struct remote_file *rfp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char readbuf[READBUFSIZE];
int tty;
if (pc->flags & KERNEL_DEBUG_QUERY) {
/*
* Don't bother copying the kernel if the daemon can
* figure it out.
*/
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "DEBUGGING_SYMBOLS %s", rfp->filename);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "NO_DEBUG")) {
sprintf(readbuf, "%s@%s", rfp->filename, pc->server);
pc->namelist = readbuf;
no_debugging_data(FATAL);
}
}
pc->namelist = create_local_namelist(rfp);
if (pc->flags & NAMELIST_LOCAL)
return;
if ((pc->nfd = open(pc->namelist,
O_RDWR|O_CREAT|O_TRUNC, S_IRWXU)) < 0) {
pc->flags &= ~UNLINK_NAMELIST;
error(FATAL, "cannot create local copy of kernel (%s)\n",
pc->namelist);
}
tty = !(pc->flags & SILENT) && isatty(fileno(stdin));
if (!(pc->flags & NAMELIST_NO_GZIP)) {
copy_remote_gzip_file(rfp, pc->namelist, tty ?
"please wait... (copying remote kernel namelist: " : NULL);
if (tty)
fprintf(stderr,
"\r \r");
return;
}
if (copy_remote_file(rfp, pc->nfd, pc->namelist,
tty ? "please wait... (copying remote kernel namelist: " : NULL)) {
if (tty)
fprintf(stderr,
"\r \r");
} else
error(FATAL, "write to local copy of kernel namelist failed\n");
}
/*
* Try to create a file of the format: vmlinux@@hostname
* If it already exists, append "_0", "_1", etc. until one's not found.
*
* The file will be unlinked by display_sys_stats() the first time it's
* called.
*/
static char *
create_local_namelist(struct remote_file *rfp)
{
char buf[BUFSIZE];
char *p1;
int i, use_local_copy;
p1 = (char *)basename(rfp->filename);
sprintf(buf, "%s@%s", p1, pc->server);
for (i = 0, use_local_copy = FALSE; i >= 0; i++) {
if (file_exists(buf, NULL)) {
if (identical_namelist(buf, rfp)) {
use_local_copy = TRUE;
break;
}
sprintf(buf, "%s@%s_%d", p1,pc->server, i);
} else
break;
}
if ((p1 = (char *)malloc((size_t)(strlen(buf)+1))) == NULL)
error(FATAL, "cannot malloc temporary file name buffer\n");
strcpy(p1, buf);
if (use_local_copy)
pc->flags |= NAMELIST_LOCAL;
else
pc->flags |= UNLINK_NAMELIST;
return p1;
}
/*
* Before copying a kernel across, check whether a kernel of the same
* name is identical to the remote version.
*/
static int
identical_namelist(char *file, struct remote_file *rfp)
{
char *vers;
FILE *pipe;
struct stat sbuf;
long csum;
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char readbuf[BUFSIZE*2];
if (stat(file, &sbuf) < 0)
return FALSE;
if (sbuf.st_size != rfp->size)
return FALSE;
if (remote_file_checksum(rfp) && file_checksum(file, &csum) &&
(csum == rfp->csum))
return TRUE;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
BZERO(readbuf, BUFSIZE);
sprintf(sendbuf, "LINUX_VERSION %s", rfp->filename);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>"))
return FALSE;
vers = recvbuf;
sprintf(readbuf, "/usr/bin/strings %s | grep 'Linux version'",
file);
if ((pipe = popen(readbuf, "r"))) {
BZERO(readbuf, BUFSIZE);
if (fread(readbuf, sizeof(char), BUFSIZE-1, pipe) <= 0) {
pclose(pipe);
return FALSE;
}
pclose(pipe);
} else
return FALSE;
if (CRASHDEBUG(1)) {
fprintf(fp, "remote version: [%s]\n", vers);
fprintf(fp, "local version: [%s]\n", readbuf);
fprintf(fp, "%s vs. %s => %s\n",
file, rfp->filename,
STREQ(vers, readbuf) ? "IDENTICAL" : "DIFFERENT");
}
return (STREQ(vers, readbuf));
}
/*
* If a remote file exists, get its checksum and return TRUE.
*/
static int
remote_file_checksum(struct remote_file *rfp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "SUM %s", rfp->filename);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>")) {
error(INFO, "%s: does not exist on server %s\n",
rfp->filename, pc->server);
return FALSE;
}
strtok(recvbuf, " "); /* SUM */
p1 = strtok(NULL, " "); /* filename */
p1 = strtok(NULL, " "); /* checksum */
rfp->csum = htol(p1, FAULT_ON_ERROR, NULL);
return TRUE;
}
/*
* Copy a remote file locally, distinguishing it by appending an ampersand
* and the server name.
*
* If the kernel is requested, save the unlinked copy of the remote kernel
* in a local file, using the same name created by create_local_namelist().
*
* If a dumpfile, module, or any other file for that matter, append an
* ampersand plus the server name.
*
* Other files may have their local filename altered if a file of the
* same name exists with a different checksum.
*/
int
get_remote_file(struct remote_file *rfp)
{
int i;
char local[BUFSIZE];
char readbuf[READBUFSIZE];
char *p1;
struct load_module *lm;
int cnt, sfd, err, retval;
long csum;
if (!REMOTE()) {
error(INFO, "no remote files in use\n");
return FALSE;
}
if (rfp->local)
goto generic_file_save;
sprintf(readbuf, "%s@%s", pc->server_memsrc, pc->server);
if (STREQ(rfp->filename, "dumpfile") ||
STREQ(rfp->filename, pc->server_memsrc) ||
STREQ(rfp->filename, basename(pc->server_memsrc)) ||
STREQ(rfp->filename, readbuf))
goto dumpfile_save;
sprintf(readbuf, "%s", pc->namelist);
if ((p1 = strstr(readbuf, "@")))
*p1 = NULLCHAR;
if (STREQ(rfp->filename, "kernel") ||
STREQ(rfp->filename, pc->namelist) ||
STREQ(rfp->filename, pc->server_namelist) ||
STREQ(rfp->filename, readbuf))
goto kernel_save;
if (STREQ(rfp->filename, "modules")) {
for (i = 0; i < kt->mods_installed; i++) {
lm = &st->load_modules[i];
if (lm->mod_flags & MOD_REMOTE) {
fprintf(fp, "%s module saved as: %s\n",
lm->mod_name, lm->mod_namelist);
lm->mod_flags &= ~MOD_REMOTE;
}
}
return TRUE;
}
if (is_module_name(rfp->filename, NULL, &lm)) {
if (lm->mod_flags & MOD_REMOTE) {
fprintf(fp, "%s module saved as: %s\n",
lm->mod_name, lm->mod_namelist);
lm->mod_flags &= ~MOD_REMOTE;
}
return TRUE;
}
strcpy(local, rfp->filename);
if ((p1 = strstr(local, ".o"))) {
*p1 = NULLCHAR;
if (is_module_name(basename(local), NULL, &lm)) {
if (lm->mod_flags & MOD_REMOTE) {
fprintf(fp, "%s module saved as: %s\n",
lm->mod_name, lm->mod_namelist);
lm->mod_flags &= ~MOD_REMOTE;
return TRUE;
}
}
}
generic_file_save:
cnt = 0;
sprintf(local, "%s@%s", basename(rfp->filename), pc->server);
while (file_exists(local, NULL)) {
if (CRASHDEBUG(1))
fprintf(fp, "%s already exists in this directory\n",
local);
if (file_checksum(local, &csum) && (csum == rfp->csum)) {
if (CRASHDEBUG(1))
error(NOTE,
"local %s checksum matches -- using it\n",
local);
strcpy(rfp->local, local);
return TRUE;
}
sprintf(local, "%s@%s_%d",
basename(rfp->filename), pc->server, ++cnt);
}
if (!remote_file_open(rfp)) {
error(INFO, "daemon cannot open: %s\n", rfp->filename);
return FALSE;
}
if ((sfd = open(local, O_RDWR|O_CREAT|O_TRUNC, S_IRWXU)) < 0) {
error(INFO, "open: %s: %s\n", local, strerror(errno));
remote_file_close(rfp);
return FALSE;
}
if (copy_remote_file(rfp, sfd, local, rfp->flags & REMOTE_VERBOSE ?
"please wait... (copying remote file: " : NULL)) {
if (rfp->flags & REMOTE_VERBOSE)
fprintf(stderr,
"\rremote file saved as: \"%s\" \n",
local);
retval = TRUE;
rfp->flags |= REMOTE_COPY_DONE;
} else {
fprintf(stderr,
"\r%s NOT saved \n",
rfp->filename);
retval = FALSE;
}
close(sfd);
remote_file_close(rfp);
if (cnt)
strcpy(rfp->local, local);
return retval;
kernel_save:
if (pc->flags & NAMELIST_SAVED) {
error(INFO, "\"%s\" is already saved\n", pc->namelist);
return FALSE;
}
if (pc->flags & NAMELIST_LOCAL) {
error(INFO, "\"%s\" is a local file\n", pc->namelist);
return FALSE;
}
if ((sfd = open(pc->namelist, O_RDWR|O_CREAT|O_TRUNC, S_IRWXU)) < 0) {
error(INFO, "open: %s: %s\n", pc->namelist, strerror(errno));
return FALSE;
}
err = 0;
lseek(sfd, 0, SEEK_SET);
lseek(pc->nfd, 0, SEEK_SET);
while ((cnt = read(pc->nfd, readbuf, READBUFSIZE)) > 0) {
if (write(sfd, readbuf, cnt) != cnt) {
error(INFO, "write:%s: %s\n",
pc->namelist, strerror(errno));
err++;
break;
}
}
close(sfd);
if (err) {
fprintf(fp, "%s NOT saved\n", pc->namelist);
unlink(pc->namelist);
retval = FALSE;
} else {
fprintf(fp, "kernel saved as: \"%s\"\n", pc->namelist);
close(pc->nfd);
pc->nfd = -1;
pc->flags |= NAMELIST_SAVED;
retval = TRUE;
}
return (retval);
dumpfile_save:
if (pc->flags & DUMPFILE_SAVED) {
error(INFO, "\"%s@%s\" is already saved\n",
basename(pc->server_memsrc), pc->server);
return FALSE;
}
if (pc->flags2 & MEMSRC_LOCAL) {
error(INFO, "%s is a local file\n", pc->dumpfile);
return FALSE;
}
if (!(REMOTE_DUMPFILE())) {
error(INFO, "%s is not a dumpfile\n", pc->server_memsrc);
return FALSE;
}
sprintf(local, "%s@%s", basename(pc->server_memsrc), pc->server);
if (file_exists(local, NULL)) {
error(INFO, "%s already exists in this directory\n",
local);
return FALSE;
}
rfp->filename = pc->server_memsrc;
if (!remote_file_open(rfp)) {
error(INFO, "daemon cannot open: %s\n", pc->server_memsrc);
return FALSE;
}
if ((sfd = open(local, O_RDWR|O_CREAT|O_TRUNC, S_IRWXU)) < 0) {
error(INFO, "open: %s: %s\n", local, strerror(errno));
remote_file_close(rfp);
return FALSE;
}
if (copy_remote_file(rfp, sfd, local,
"please wait... (copying remote dumpfile: ")) {
fprintf(stderr,
"\rdumpfile saved as: \"%s\" \n",
local);
pc->flags |= DUMPFILE_SAVED;
retval = TRUE;
} else {
fprintf(stderr,
"\r%s NOT saved \n",
pc->server_memsrc);
retval = FALSE;
}
close(sfd);
remote_file_close(rfp);
return (retval);
}
/*
* Query the remote daemon for the kernel name that is running.
*/
static int
remote_find_booted_kernel(struct remote_file *rfp)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "FIND_BOOTED_KERNEL");
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
strtok(recvbuf, " "); /* FIND_BOOTED_KERNEL */
p1 = strtok(NULL, " "); /* filename */
if (STREQ(p1, "<FAIL>"))
return FALSE;
strcpy(rfp->filename, p1);
return TRUE;
}
static int
remote_lkcd_dump_init(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1, *p2, *p3;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "LKCD_DUMP_INIT %d %s", pc->rmfd, pc->server_memsrc);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>"))
return FALSE;
p1 = strstr(recvbuf, "panic_task: ");
p2 = strstr(recvbuf, "panicmsg: ");
if (p1) {
p1 += strlen("panic_task: ");
p3 = strstr(p1, "\n");
*p3 = NULLCHAR;
tt->panic_task = htol(p1, FAULT_ON_ERROR, NULL);
if (CRASHDEBUG(1))
fprintf(fp, "panic_task: %lx\n", tt->panic_task);
}
if (p2) {
p2 += strlen("panicmsg: ");
if (CRASHDEBUG(1))
fprintf(fp, "panicmsg: %s", p2);
}
set_remote_lkcd_panic_data(tt->panic_task, p2);
return TRUE;
}
static int
remote_s390_dump_init(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1, *p2, *p3;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "S390_DUMP_INIT %d %s", pc->rmfd, pc->server_memsrc);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>"))
return FALSE;
p1 = strstr(recvbuf, "panic_task: ");
p2 = strstr(recvbuf, "panicmsg: ");
if (p1) {
p1 += strlen("panic_task: ");
p3 = strstr(p1, "\n");
*p3 = NULLCHAR;
tt->panic_task = htol(p1, FAULT_ON_ERROR, NULL);
if (CRASHDEBUG(1))
fprintf(fp, "panic_task: %lx\n", tt->panic_task);
}
if (p2) {
p2 += strlen("panicmsg: ");
if (CRASHDEBUG(1))
fprintf(fp, "panicmsg: %s", p2);
}
return TRUE;
}
static int
remote_netdump_init(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1, *p2;
ulong panic_task;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "NETDUMP_INIT %d %s", pc->rmfd, pc->server_memsrc);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>"))
return FALSE;
p1 = strstr(recvbuf, "panic_task: ");
if (p1) {
p1 += strlen("panic_task: ");
p2 = strstr(p1, "\n");
*p2 = NULLCHAR;
panic_task = htol(p1, FAULT_ON_ERROR, NULL);
tt->panic_task = panic_task; /* kludge */
if (CRASHDEBUG(1))
fprintf(fp, "panic_task: %lx\n", tt->panic_task);
}
return TRUE;
}
uint
remote_page_size(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *p1, *p2, *p3;
uint psz;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
if (REMOTE_ACTIVE())
sprintf(sendbuf, "PAGESIZE LIVE");
else if (REMOTE_PAUSED())
sprintf(sendbuf, "PAGESIZE NIL");
else if (pc->flags & REM_NETDUMP)
sprintf(sendbuf, "PAGESIZE NETDUMP");
else if (pc->flags & REM_MCLXCD)
sprintf(sendbuf, "PAGESIZE MCLXCD");
else if (pc->flags & REM_LKCD)
sprintf(sendbuf, "PAGESIZE LKCD");
else if (pc->flags & REM_S390D)
sprintf(sendbuf, "PAGESIZE S390D");
else
error(FATAL,
"cannot determine remote page size (unknown memory source)\n");
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "FAIL"))
error(FATAL, "cannot determine remote page size\n");
strtok(recvbuf, " "); /* PAGESIZE */
p1 = strtok(NULL, " "); /* LIVE, MCLXCD or LKCD */
p1 = strtok(NULL, " "); /* page size */
p2 = strtok(NULL, " "); /* remote type */
p3 = strtok(NULL, " "); /* number of Cpus */
psz = atoi(p1);
if (psz > MAXRECVBUFSIZE)
error(FATAL,
"remote page size %d is larger than MAXRECVBUFSIZE!\n", psz);
if (p2) {
strncpy(rc->remote_type, p2, sizeof(rc->remote_type) - 1);
rc->remote_type[sizeof(rc->remote_type) - 1] = 0;
}
if (p3)
rc->n_cpus = atoi(p3);
return psz;
}
/*
* Copy a remote file to a local file, closing the passed-in fd when done.
* A running tally of percentage-done numbers can optionally be displayed.
*/
static int
copy_remote_file(struct remote_file *rfp, int fd, char *file, char *ttystr)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE*2];
char readbuf[READBUFSIZE];
char *bufptr;
long pct, last;
ulong size, offset, filesize;
ulong ret, req, tot;
int sysret ATTRIBUTE_UNUSED;
ssize_t bytes ATTRIBUTE_UNUSED;
last = -1;
lseek(fd, 0, SEEK_SET);
filesize = rfp->size;
for (offset = 0; offset < filesize; ) {
size = MIN(filesize-offset, pc->rcvbufsize);
BZERO(sendbuf, BUFSIZE);
sprintf(sendbuf, "READ %d %lx %ld", rfp->fd, offset, size);
bytes = write(pc->sockfd, sendbuf, strlen(sendbuf) + 1);
bzero(readbuf, READBUFSIZE);
req = size;
tot = 0;
sprintf(recvbuf, "%s:FAIL", sendbuf);
bufptr = readbuf;
while (req) {
ret = recv(pc->sockfd, bufptr, req, 0);
if (!tot && STRNEQ(bufptr, recvbuf)) {
tot = -1;
break;
}
req -= ret;
tot += ret;
bufptr += ret;
}
if (tot == -1)
break;
if (write(fd, readbuf, size) != size) {
error(INFO,
"%swrite to local file \"%s\" failed",
ttystr ? "\n" : "", file);
close(fd);
return FALSE;
}
offset += tot;
if (ttystr) {
pct = (offset*100)/filesize;
if (pct > last) { /* readline work-around... */
if (last < 0)
sprintf(readbuf, "echo -n \'%s0%%)\'",
ttystr);
else if (last >= 0 && last < 10)
sprintf(readbuf,
"echo -e -n \"\\b\\b\\b%ld%%)\"",
pct);
else if (last < 100)
sprintf(readbuf,
"echo -e -n \"\\b\\b\\b\\b%ld%%)\"",
pct);
sysret = system(readbuf);
last = pct;
}
}
}
if (offset != filesize) {
error(INFO, "%swrite to local file \"%s\" failed",
ttystr ? "\n" : "", file);
close(fd);
return FALSE;
}
fsync(fd);
return TRUE;
}
/*
* Copy a remote file to a local file, closing the passed-in fd when done.
* A running tally of percentage-done numbers can optionally be displayed.
*/
static void
copy_remote_gzip_file(struct remote_file *rfp, char *file, char *ttystr)
{
int done;
char sendbuf[BUFSIZE];
char readbuf[READBUFSIZE];
char gziphdr[DATA_HDRSIZE];
char *bufptr, *p1;
FILE *pipe;
size_t gtot;
struct stat sbuf;
ulong pct, ret, req, tot, total;
sprintf(readbuf, "/usr/bin/gunzip > %s", pc->namelist);
if ((pipe = popen(readbuf, "w")) == NULL)
error(FATAL, "cannot open pipe to create %s\n", pc->namelist);
BZERO(sendbuf, BUFSIZE);
sprintf(sendbuf, "READ_GZIP %ld %s", pc->rcvbufsize, rfp->filename);
remote_tcp_write_string(pc->sockfd, sendbuf);
bzero(readbuf, READBUFSIZE);
done = total = 0;
gtot = 0;
while (!done) {
req = pc->rcvbufsize;
bufptr = readbuf;
tot = 0;
while (req) {
ret = (ulong)recv(pc->sockfd, bufptr, req, 0);
if (!tot) {
if (STRNEQ(bufptr, FAILMSG)) {
fprintf(fp,
"copy_remote_gzip_file: %s\n",
bufptr);
tot = -1;
break;
}
if (STRNEQ(bufptr, DONEMSG) ||
STRNEQ(bufptr, DATAMSG)) {
BCOPY(bufptr, gziphdr, DATA_HDRSIZE);
if (CRASHDEBUG(1))
fprintf(fp,
"copy_remote_gzip_file: [%s]\n",
gziphdr);
p1 = strtok(gziphdr, " "); /* DONE */
if (STREQ(p1, "DONE"))
done = TRUE;
p1 = strtok(NULL, " "); /* count */
gtot = atol(p1);
total += gtot;
}
}
req -= ret;
tot += ret;
bufptr += ret;
}
if (tot == -1)
break;
if (fwrite(&readbuf[DATA_HDRSIZE], sizeof(char), gtot, pipe)
!= gtot)
error(FATAL, "fwrite to %s failed\n", pc->namelist);
if (ttystr && (stat(pc->namelist, &sbuf) == 0)) {
pct = (sbuf.st_size * 100)/rfp->size;
fprintf(stderr, "\r%s%ld%%)%s",
ttystr, pct, CRASHDEBUG(1) ? "\n" : "");
}
}
if (CRASHDEBUG(1))
fprintf(fp, "copy_remote_gzip_file: GZIP total: %ld\n", total);
pclose(pipe);
}
/*
* Set up to have get_remote_file() copy the remote module locally.
* If it's already here, no copy is done.
*/
int
find_remote_module_objfile(struct load_module *lm, char *module, char *retbuf)
{
int absolute;
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char local[BUFSIZE];
char found[BUFSIZE];
char *p1;
long csum;
struct remote_file remote_file, *rfp;
rfp = &remote_file;
BZERO(rfp, sizeof(struct remote_file));
absolute = (*module == '/');
if (absolute) {
if ((p1 = strstr(module, "@"))) {
*p1 = NULLCHAR;
} else {
error(FATAL,
"module file name must have \"@server-name\" attached\n");
}
sprintf(local, "%s@%s", basename(module), pc->server);
rfp->filename = module;
rfp->local = local;
if (!remote_file_checksum(rfp)) {
error(INFO, "%s: does not exist on server %s\n",
module, pc->server);
return FALSE;
}
} else {
if ((p1 = strstr(module, "@")))
*p1 = NULLCHAR;
sprintf(local, "%s@%s", module, pc->server);
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "FIND_MODULE %s %s",
kt->utsname.release, module);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
if (strstr(recvbuf, "<FAIL>")) {
fprintf(fp, "find_remote_module_objfile: [%s]\n",
recvbuf);
return FALSE;
}
strtok(recvbuf, " "); /* FIND_MODULE */
p1 = strtok(NULL, " "); /* release */
p1 = strtok(NULL, " "); /* module */
strcpy(found, strtok(NULL, " ")); /* resultant path */
p1 = strtok(NULL, " "); /* checksum */
csum = htol(p1, FAULT_ON_ERROR, NULL);
rfp->filename = found;
rfp->local = local;
rfp->csum = csum;
}
if (get_remote_file(rfp)) {
if (!is_elf_file(rfp->local)) {
error(INFO,
"%s@%s: not an ELF format object file\n",
rfp->filename, pc->server);
return FALSE;
}
strcpy(retbuf, rfp->local);
if (rfp->flags & REMOTE_COPY_DONE) {
lm->mod_flags |= MOD_REMOTE;
pc->flags |= UNLINK_MODULES;
}
return TRUE;
}
return FALSE;
}
/*
* Tell the daemon to free the current dumpfile memory.
*/
int
remote_free_memory(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *type, *p1;
if (pc->flags & REM_NETDUMP)
type = "NETDUMP";
else if (pc->flags & REM_MCLXCD)
type = "MCLXCD";
else if (pc->flags & REM_LKCD)
type = "LKCD";
else if (pc->flags & REM_S390D)
type = "S390D";
else
return 0;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "MEMORY FREE %s", type);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
p1 = strtok(recvbuf, " "); /* MEMORY */
p1 = strtok(NULL, " "); /* FREE */
p1 = strtok(NULL, " "); /* MCLXCD, LKCD etc. */
p1 = strtok(NULL, " "); /* pages */
if (STREQ(p1, "<FAIL>"))
return 0;
return(atol(p1));
}
/*
* Return the number of dumpfile pages used by the daemon.
*/
int
remote_memory_used(void)
{
char sendbuf[BUFSIZE];
char recvbuf[BUFSIZE];
char *type, *p1;
if (pc->flags & REM_NETDUMP)
type = "NETDUMP";
else if (pc->flags & REM_MCLXCD)
type = "MCLXCD";
else if (pc->flags & REM_LKCD)
type = "LKCD";
else if (pc->flags & REM_S390D)
type = "S390D";
else
return 0;
BZERO(sendbuf, BUFSIZE);
BZERO(recvbuf, BUFSIZE);
sprintf(sendbuf, "MEMORY USED %s", type);
remote_tcp_write_string(pc->sockfd, sendbuf);
remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, NIL_MODE());
p1 = strtok(recvbuf, " "); /* MEMORY */
p1 = strtok(NULL, " "); /* FREE */
p1 = strtok(NULL, " "); /* MCLXCD, LKCD, etc. */
p1 = strtok(NULL, " "); /* pages */
if (STREQ(p1, "<FAIL>"))
return 0;
return(atol(p1));
}
/*
* Have the daemon return the output of vas_memory_dump(), lkcd_memory_dump().
* or dump_lkcd_environment()
*/
int
remote_memory_dump(int verbose)
{
char sendbuf[BUFSIZE];
char readbuf[READBUFSIZE];
char datahdr[DATA_HDRSIZE];
char *type, *bufptr, *p1;
ulong done, total;
ulong ret, req, tot;
size_t dtot;
if (pc->flags & REM_NETDUMP)
type = "NETDUMP";
else if (pc->flags & REM_MCLXCD)
type = "MCLXCD";
else if (pc->flags & REM_LKCD)
type = "LKCD";
else if (pc->flags & REM_S390D)
type = "S390D";
else
return 0;
BZERO(sendbuf, BUFSIZE);
sprintf(sendbuf, "MEMORY_DUMP %ld %s%s", pc->rcvbufsize, type,
verbose ? "_VERBOSE" : "");
remote_tcp_write_string(pc->sockfd, sendbuf);
bzero(readbuf, READBUFSIZE);
done = total = 0;
dtot = 0;
while (!done) {
req = pc->rcvbufsize;
bufptr = readbuf;
tot = 0;
while (req) {
ret = recv(pc->sockfd, bufptr, req, 0);
if (!tot) {
if (STRNEQ(bufptr, FAILMSG)) {
fprintf(fp,
"remote_memory_dump: %s\n",
bufptr);
tot = -1;
break;
}
if (STRNEQ(bufptr, DONEMSG) ||
STRNEQ(bufptr, DATAMSG)) {
BCOPY(bufptr, datahdr, DATA_HDRSIZE);
if (CRASHDEBUG(1))
fprintf(fp,
"remote_memory_dump: [%s]\n",
datahdr);
p1 = strtok(datahdr, " "); /* DONE */
if (STREQ(p1, "DONE"))
done = TRUE;
p1 = strtok(NULL, " "); /* count */
dtot = atol(p1);
total += dtot;
}
}
req -= ret;
tot += ret;
bufptr += ret;
}
if (tot == -1)
break;
if (fwrite(&readbuf[DATA_HDRSIZE], sizeof(char), dtot, fp)
!= dtot)
error(FATAL, "fwrite to %s failed\n", pc->namelist);
}
return 1;
}
/*
* Read memory from the remote memory source. The remote file descriptor
* is abstracted to allow for a common /dev/mem-/dev/kmem call. Since
* this is only called from read_daemon(), the request can never exceed
* a page in length.
*/
int
remote_memory_read(int rfd, char *buffer, int cnt, physaddr_t address, int vcpu)
{
char sendbuf[BUFSIZE];
char datahdr[DATA_HDRSIZE];
char *p1;
int ret, tot;
ulong addr;
addr = (ulong)address; /* may be virtual */
BZERO(sendbuf, BUFSIZE);
if (pc->flags & REM_NETDUMP) {
sprintf(sendbuf, "READ_NETDUMP %lx %d", addr, cnt);
} else if (pc->flags & REM_MCLXCD)
sprintf(sendbuf, "READ_MCLXCD %lx %d", addr, cnt);
else if (pc->flags & REM_LKCD)
sprintf(sendbuf, "READ_LKCD %d %lx %d", rfd, addr, cnt);
else if (pc->flags & REM_S390D)
sprintf(sendbuf, "READ_S390D %d %lx %d", rfd, addr, cnt);
else if (vcpu >= 0)
sprintf(sendbuf, "READ_LIVE %d %lx %d %d", rfd, addr, cnt, vcpu);
else
sprintf(sendbuf, "READ_LIVE %d %lx %d", rfd, addr, cnt);
if (remote_tcp_write_string(pc->sockfd, sendbuf))
return -1;
/*
* Read request will come back with a singular header
* followed by the data.
*/
BZERO(datahdr, DATA_HDRSIZE);
ret = remote_tcp_read_string(pc->sockfd, datahdr, DATA_HDRSIZE, 1);
if (ret <= 0)
return -1;
if (CRASHDEBUG(3))
fprintf(fp, "remote_memory_read: [%s]\n", datahdr);
if (STRNEQ(datahdr, FAILMSG)) {
p1 = strtok(datahdr, " "); /* FAIL */
p1 = strtok(NULL, " "); /* errno */
errno = atoi(p1);
return -1;
}
if (!STRNEQ(datahdr, DONEMSG) && !STRNEQ(datahdr, DATAMSG)) {
error(INFO, "out of sync with remote memory source\n");
return -1;
}
p1 = strtok(datahdr, " "); /* DONE */
p1 = strtok(NULL, " "); /* count */
tot = atol(p1);
if (cnt != tot) {
error(FATAL,
"requested %d bytes remote memory return %d bytes\n",
cnt, tot);
return -1;
}
ret = remote_tcp_read(pc->sockfd, buffer, tot);
if (ret != tot) {
error(FATAL,
"requested %d bytes remote memory return %d bytes\n",
ret, tot);
return -1;
}
return tot;
}
/*
* If a command was interrupted locally, there may be leftover data waiting
* to be read.
*/
void
remote_clear_pipeline(void)
{
int ret;
fd_set rfds;
char recvbuf[READBUFSIZE];
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_SET(pc->sockfd, &rfds);
ret = select(pc->sockfd+1, &rfds, NULL, NULL, &tv);
if (FD_ISSET(pc->sockfd, &rfds)) {
ret = recv(pc->sockfd, recvbuf, pc->rcvbufsize, 0);
if (CRASHDEBUG(1))
error(INFO,
"remote_clear_pipeline(%d): %d bytes discarded\n",
pc->sockfd, ret);
}
}
/*
* Attempt to run the user-entered command on the remote system.
*/
int
remote_execute(void)
{
char command[BUFSIZE];
char sendbuf[BUFSIZE*2];
char readbuf[READBUFSIZE];
char datahdr[DATA_HDRSIZE];
char *bufptr, *p1;
ulong done, total;
ulong ret, req, tot;
size_t dtot;
if (!STRNEQ(args[0], "@") || strlen(args[0]) == 1)
return FALSE;
shift_string_left(concat_args(command, 0, FALSE), 1);
if (QUOTED_STRING(command))
strip_ending_char(strip_beginning_char(command, '"'), '"');
if (CRASHDEBUG(1))
error(INFO, "remote command: %s\n", command);
BZERO(sendbuf, BUFSIZE);
sprintf(sendbuf, "EXECUTE %ld %s", pc->rcvbufsize, command);
remote_tcp_write_string(pc->sockfd, sendbuf);
bzero(readbuf, READBUFSIZE);
done = total = 0;
dtot = 0;
while (!done) {
req = pc->rcvbufsize;
bufptr = readbuf;
tot = 0;
while (req) {
ret = recv(pc->sockfd, bufptr, req, 0);
if (!tot) {
if (STRNEQ(bufptr, FAILMSG)) {
fprintf(fp,
"remote_execute: %s\n",
bufptr);
tot = -1;
break;
}
if (STRNEQ(bufptr, DONEMSG) ||
STRNEQ(bufptr, DATAMSG)) {
BCOPY(bufptr, datahdr, DATA_HDRSIZE);
if (CRASHDEBUG(1))
fprintf(fp,
"remote_execute: [%s]\n",
datahdr);
p1 = strtok(datahdr, " "); /* DONE */
if (STREQ(p1, "DONE"))
done = TRUE;
p1 = strtok(NULL, " "); /* count */
dtot = atol(p1);
total += dtot;
}
}
req -= ret;
tot += ret;
bufptr += ret;
}
if (tot == -1)
break;
if (fwrite(&readbuf[DATA_HDRSIZE], sizeof(char), dtot, fp)
!= dtot)
error(FATAL, "fwrite failed\n");
}
return TRUE;
}
/*
* Clean up on exit.
*/
void
remote_exit(void)
{
char buf[BUFSIZE];
if (pc->flags & UNLINK_NAMELIST)
unlink(pc->namelist);
if (pc->flags & UNLINK_MODULES)
unlink_module(NULL);
BZERO(buf, BUFSIZE);
sprintf(buf, "EXIT");
remote_tcp_write_string(pc->sockfd, buf);
/*
* Read but ignore the return status -- we don't really care...
*/
remote_tcp_read_string(pc->sockfd, buf, BUFSIZE-1, NIL_MODE());
}
#endif /* !DAEMON */