/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * 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 version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2015, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lnet/utils/debug.c
 * Some day I'll split all of this functionality into a cfs_debug module
 * of its own. That day is not today.
 */

#define __USE_FILE_OFFSET64
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>

#include <linux/types.h>

#include <libcfs/util/ioctl.h>
#include <libcfs/util/param.h>
#include <libcfs/libcfs_debug.h>
#include <lnet/lnetctl.h>

static char rawbuf[8192];
static char *buf = rawbuf;
static int max = 8192;
/*static int g_pfd = -1;*/
static int subsystem_mask = ~0;
static int debug_mask = ~0;

#define MAX_MARK_SIZE 256

static const char *libcfs_debug_subsystems[] = LIBCFS_DEBUG_SUBSYS_NAMES;
static const char *libcfs_debug_masks[] = LIBCFS_DEBUG_MASKS_NAMES;

#define DAEMON_CTL_NAME		"daemon_file"
#define SUBSYS_DEBUG_CTL_NAME	"subsystem_debug"
#define DEBUG_CTL_NAME		"debug"
#define DUMP_KERNEL_CTL_NAME	"dump_kernel"

/*
 * Open the parameter file "debug" which controls the debugging
 * flags used to determine what information ends up in the lustre
 * logs collected by lctl dk or the debug daemon.
 */
static int
dbg_open_ctlhandle(const char *str)
{
	glob_t path;
	int fd, rc;

	rc = cfs_get_param_paths(&path, "%s", str);
	if (rc != 0) {
		fprintf(stderr, "invalid parameter '%s'\n", str);
		return -1;
	}

	fd = open(path.gl_pathv[0], O_WRONLY);
	if (fd < 0)
		fprintf(stderr, "open '%s' failed: %s\n",
			path.gl_pathv[0], strerror(errno));

	cfs_free_param_data(&path);
	return fd;
}

static void
dbg_close_ctlhandle(int fd)
{
	close(fd);
}

static int
dbg_write_cmd(int fd, char *str, int len)
{
	int rc = write(fd, str, len);

	return (rc == len ? 0 : 1);
}


static int do_debug_mask(char *name, int enable)
{
	int found = 0;
	int i;

	for (i = 0; libcfs_debug_subsystems[i] != NULL; i++) {
		if (strcasecmp(name, libcfs_debug_subsystems[i]) == 0 ||
		    strcasecmp(name, "all_subs") == 0) {
			printf("%s output from subsystem \"%s\"\n",
				enable ? "Enabling" : "Disabling",
				libcfs_debug_subsystems[i]);
			if (enable)
				subsystem_mask |= (1 << i);
			else
				subsystem_mask &= ~(1 << i);
			found = 1;
		}
	}
	for (i = 0; libcfs_debug_masks[i] != NULL; i++) {
		if (strcasecmp(name, libcfs_debug_masks[i]) == 0 ||
		    strcasecmp(name, "all_types") == 0) {
			printf("%s output of type \"%s\"\n",
				enable ? "Enabling" : "Disabling",
				libcfs_debug_masks[i]);
			if (enable)
				debug_mask |= (1 << i);
			else
				debug_mask &= ~(1 << i);
			found = 1;
		}
	}

	return found;
}

int dbg_initialize(int argc, char **argv)
{
	return 0;
}

int jt_dbg_filter(int argc, char **argv)
{
	int i;

	if (argc < 2) {
		fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
			argv[0]);
		return 0;
	}

	for (i = 1; i < argc; i++)
		if (!do_debug_mask(argv[i], 0))
			fprintf(stderr, "Unknown subsystem or debug type: %s\n",
				argv[i]);
	return 0;
}

int jt_dbg_show(int argc, char **argv)
{
	int i;

	if (argc < 2) {
		fprintf(stderr, "usage: %s <subsystem ID or debug mask>\n",
			argv[0]);
		return 0;
	}

	for (i = 1; i < argc; i++)
		if (!do_debug_mask(argv[i], 1))
			fprintf(stderr, "Unknown subsystem or debug type: %s\n",
				argv[i]);

	return 0;
}

static int applymask(char *param, int value)
{
	int	rc;
	char	buf[64];
	int	len = snprintf(buf, 64, "%d", value);

	int fd = dbg_open_ctlhandle(param);
	if (fd < 0)
		return fd;

	rc = dbg_write_cmd(fd, buf, len+1);
	if (rc != 0) {
		fprintf(stderr, "Write to %s failed: %s\n",
			param, strerror(errno));
	}

	dbg_close_ctlhandle(fd);

	return rc;
}

static void applymask_all(unsigned int subs_mask, unsigned int debug_mask)
{
	applymask(SUBSYS_DEBUG_CTL_NAME, subs_mask);
	applymask(DEBUG_CTL_NAME, debug_mask);
	printf("Applied subsystem_debug=%d, debug=%d to lnet\n",
	       subs_mask, debug_mask);
}

int jt_dbg_list(int argc, char **argv)
{
	int i;

	if (argc != 2) {
		fprintf(stderr, "usage: %s <subs || types>\n", argv[0]);
		return 0;
	}

	if (strcasecmp(argv[1], "subs") == 0) {
		printf("Subsystems: all_subs");
		for (i = 0; libcfs_debug_subsystems[i] != NULL; i++)
			if (libcfs_debug_subsystems[i][0])
				printf(", %s", libcfs_debug_subsystems[i]);
		printf("\n");
	} else if (strcasecmp(argv[1], "types") == 0) {
		printf("Types: all_types");
		for (i = 0; libcfs_debug_masks[i] != NULL; i++)
			printf(", %s", libcfs_debug_masks[i]);
		printf("\n");
	} else if (strcasecmp(argv[1], "applymasks") == 0) {
		applymask_all(subsystem_mask, debug_mask);
	}
	return 0;
}

/* all strings nul-terminated; only the struct and hdr need to be freed */
struct dbg_line {
	struct ptldebug_header *hdr;
	char		       *file;
	char		       *fn;
	char		       *text;
};

static int cmp_rec(const void *p1, const void *p2)
{
	struct dbg_line *d1 = *(struct dbg_line **)p1;
	struct dbg_line *d2 = *(struct dbg_line **)p2;

	if (d1->hdr->ph_sec < d2->hdr->ph_sec)
		return -1;
	if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
	    d1->hdr->ph_usec < d2->hdr->ph_usec)
		return -1;
	if (d1->hdr->ph_sec == d2->hdr->ph_sec &&
	    d1->hdr->ph_usec == d2->hdr->ph_usec)
		return 0;
	return 1;
}

static void print_rec(struct dbg_line ***linevp, int used, int fdout)
{
	struct dbg_line **linev = *linevp;
	int		  i;

	qsort(linev, used, sizeof(struct dbg_line *), cmp_rec);
	for (i = 0; i < used; i++) {
		struct dbg_line		*line = linev[i];
		struct ptldebug_header	*hdr = line->hdr;
		char			 out[4097];
		char			*buf = out;
		int			 bytes;
		ssize_t			 bytes_written;

		bytes = snprintf(out, sizeof(out),
				"%08x:%08x:%u.%u%s:%u.%06llu:%u:%u:%u:"
				"(%s:%u:%s()) %s",
				hdr->ph_subsys, hdr->ph_mask,
				hdr->ph_cpu_id, hdr->ph_type,
				hdr->ph_flags & PH_FLAG_FIRST_RECORD ? "F" : "",
				hdr->ph_sec, (unsigned long long)hdr->ph_usec,
				hdr->ph_stack, hdr->ph_pid, hdr->ph_extern_pid,
				line->file, hdr->ph_line_num, line->fn,
				line->text);
		while (bytes > 0) {
			bytes_written = write(fdout, buf, bytes);
			if (bytes_written <= 0)
				break;
			bytes -= bytes_written;
			buf += bytes_written;
		}
		free(line->hdr);
		free(line);
	}
	free(linev);
	*linevp = NULL;
}

static int add_rec(struct dbg_line *line, struct dbg_line ***linevp, int *lenp,
		   int used)
{
	struct dbg_line **linev = *linevp;

	if (used == *lenp) {
		int nlen = *lenp + 4096;
		int nsize = nlen * sizeof(struct dbg_line *);

		linev = realloc(*linevp, nsize);
		if (!linev)
			return -ENOMEM;

		*linevp = linev;
		*lenp = nlen;
	}
	linev[used] = line;

	return 0;
}

static void dump_hdr(unsigned long long offset, struct ptldebug_header *hdr)
{
	fprintf(stderr, "badly-formed record at offset = %llu\n", offset);
	fprintf(stderr, "  len = %u\n", hdr->ph_len);
	fprintf(stderr, "  flags = %x\n", hdr->ph_flags);
	fprintf(stderr, "  subsystem = %x\n", hdr->ph_subsys);
	fprintf(stderr, "  mask = %x\n", hdr->ph_mask);
	fprintf(stderr, "  cpu_id = %u\n", hdr->ph_cpu_id);
	fprintf(stderr, "  type = %u\n", hdr->ph_type);
	fprintf(stderr, "  seconds = %u\n", hdr->ph_sec);
	fprintf(stderr, "  microseconds = %lu\n", (long)hdr->ph_usec);
	fprintf(stderr, "  stack = %u\n", hdr->ph_stack);
	fprintf(stderr, "  pid = %u\n", hdr->ph_pid);
	fprintf(stderr, "  host pid = %u\n", hdr->ph_extern_pid);
	fprintf(stderr, "  line number = %u\n", hdr->ph_line_num);
}

#define HDR_SIZE sizeof(*hdr)

static int parse_buffer(int fdin, int fdout)
{
	struct dbg_line		*line;
	struct ptldebug_header	*hdr;
	char			 buf[4097];
	char			*ptr;
	unsigned long		 dropped = 0;
	unsigned long		 kept = 0;
	unsigned long		 bad = 0;
	struct dbg_line		**linev = NULL;
	int			 linev_len = 0;
	int			 rc;

	hdr = (void *)buf;

	while (1) {
		int first_bad = 1;
		int count;

		count = HDR_SIZE;
		ptr = buf;
readhdr:
		rc = read(fdin, ptr, count);
		if (rc <= 0)
			goto print;

		ptr += rc;
		count -= rc;
		if (count > 0)
			goto readhdr;

		if (hdr->ph_len > 4094 ||       /* is this header bogus? */
		    hdr->ph_stack > 65536 ||
		    hdr->ph_sec < (1 << 30) ||
		    hdr->ph_usec > 1000000000 ||
		    hdr->ph_line_num > 65536) {
			if (first_bad)
				dump_hdr(lseek(fdin, 0, SEEK_CUR), hdr);
			bad += first_bad;
			first_bad = 0;

			/* try to restart on next line */
			while (count < HDR_SIZE && buf[count] != '\n')
				count++;
			if (buf[count] == '\n')
				count++; /* move past '\n' */
			if (HDR_SIZE - count > 0) {
				int left = HDR_SIZE - count;

				memmove(buf, buf + count, left);
				ptr = buf + left;

				goto readhdr;
			}

			continue;
		}

		if (hdr->ph_len == 0)
			continue;

		count = hdr->ph_len - HDR_SIZE;
readmore:
		rc = read(fdin, ptr, count);
		if (rc <= 0)
			break;

		ptr += rc;
		count -= rc;
		if (count > 0)
			goto readmore;

		first_bad = 1;

		if ((hdr->ph_subsys && !(subsystem_mask & hdr->ph_subsys)) ||
		    (hdr->ph_mask && !(debug_mask & hdr->ph_mask))) {
			dropped++;
			continue;
		}

retry_alloc:
		line = malloc(sizeof(*line));
		if (line == NULL) {
			if (linev) {
				fprintf(stderr, "error: line malloc(%u): "
					"printing accumulated records\n",
					(unsigned int)sizeof(*line));
				print_rec(&linev, kept, fdout);

				goto retry_alloc;
			}
			fprintf(stderr, "error: line malloc(%u): exiting\n",
				(unsigned int)sizeof(*line));
			break;
		}

		line->hdr = malloc(hdr->ph_len + 1);
		if (line->hdr == NULL) {
			free(line);
			if (linev) {
				fprintf(stderr, "error: hdr malloc(%u): "
					"printing accumulated records\n",
					hdr->ph_len + 1);
				print_rec(&linev, kept, fdout);

				goto retry_alloc;
			}
			fprintf(stderr, "error: hdr malloc(%u): exiting\n",
					hdr->ph_len + 1);
			break;
		}

		ptr = (void *)line->hdr;
		memcpy(line->hdr, buf, hdr->ph_len);
		ptr[hdr->ph_len] = '\0';

		ptr += sizeof(*hdr);
		line->file = ptr;
		ptr += strlen(line->file) + 1;
		line->fn = ptr;
		ptr += strlen(line->fn) + 1;
		line->text = ptr;

retry_add:
		if (add_rec(line, &linev, &linev_len, kept) < 0) {
			if (linev) {
				fprintf(stderr, "error: add_rec[%u] failed; "
					"print accumulated records\n",
					linev_len);
				print_rec(&linev, kept, fdout);

				goto retry_add;
			}
			fprintf(stderr, "error: add_rec[0] failed; exiting\n");
			break;
		}
		kept++;
	}

print:
	if (linev)
		print_rec(&linev, kept, fdout);

	printf("Debug log: %lu lines, %lu kept, %lu dropped, %lu bad.\n",
		dropped + kept + bad, kept, dropped, bad);

	return 0;
}

int jt_dbg_debug_kernel(int argc, char **argv)
{
	struct stat	st;
	char		filename[PATH_MAX];
	int		raw = 0;
	int		save_errno;
	int		fdin;
	int		fdout;
	int		rc;

	if (argc > 3) {
		fprintf(stderr, "usage: %s [file] [raw]\n", argv[0]);
		return 0;
	}

	if (argc > 2) {
		raw = atoi(argv[2]);
	} else if (argc > 1 && (argv[1][0] == '0' || argv[1][0] == '1')) {
		raw = atoi(argv[1]);
		argc--;
	}

	/* If we are dumping raw (which means no conversion step to ASCII)
	 * then dump directly to any supplied filename, otherwise this is
	 * just a temp file and we dump to the real file at convert time. */
	if (argc > 1 && raw) {
		if (strlen(argv[1]) >= sizeof(filename)) {
			fprintf(stderr, "File name too long: %s\n", argv[1]);
			return 1;
		}
		strncpy(filename, argv[1], sizeof(filename));
	} else {
		if (snprintf(filename, sizeof(filename), "%s%lu.%u",
			     LIBCFS_DEBUG_FILE_PATH_DEFAULT, time(NULL),
			     getpid())
		    >= sizeof(filename)) {
			fprintf(stderr, "File name too long\n");
			return 1;
		}
	}

	if (stat(filename, &st) == 0 && S_ISREG(st.st_mode))
		unlink(filename);

	fdin = dbg_open_ctlhandle(DUMP_KERNEL_CTL_NAME);
	if (fdin < 0) {
		fprintf(stderr, "open(dump_kernel) failed: %s\n",
			strerror(errno));
		return 1;
	}

	rc = dbg_write_cmd(fdin, filename, strlen(filename));
	save_errno = errno;
	dbg_close_ctlhandle(fdin);
	if (rc != 0) {
		fprintf(stderr, "write(%s) failed: %s\n", filename,
			strerror(save_errno));
		return 1;
	}

	if (raw)
		return 0;

	fdin = open(filename, O_RDONLY);
	if (fdin < 0) {
		if (errno == ENOENT) /* no dump file created */
			return 0;
		fprintf(stderr, "fopen(%s) failed: %s\n", filename,
			strerror(errno));
		return 1;
	}
	if (argc > 1) {
		fdout = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC,
			     S_IRUSR | S_IWUSR);
		if (fdout < 0) {
			fprintf(stderr, "fopen(%s) failed: %s\n", argv[1],
				strerror(errno));
			close(fdin);
			return 1;
		}
	} else {
		fdout = fileno(stdout);
	}

	rc = parse_buffer(fdin, fdout);
	close(fdin);
	if (argc > 1)
		close(fdout);
	if (rc) {
		fprintf(stderr, "parse_buffer failed; leaving tmp file %s "
			"behind.\n", filename);
	} else {
		rc = unlink(filename);
		if (rc)
			fprintf(stderr, "dumped successfully, but couldn't "
				"unlink tmp file %s: %s\n", filename,
				strerror(errno));
	}

	return rc;
}

int jt_dbg_debug_file(int argc, char **argv)
{
	int fdin;
	int fdout;
	int rc;

	if (argc > 3 || argc < 2) {
		fprintf(stderr, "usage: %s <input> [output]\n", argv[0]);
		return 0;
	}

	fdin = open(argv[1], O_RDONLY | O_LARGEFILE);
	if (fdin < 0) {
		fprintf(stderr, "open(%s) failed: %s\n", argv[1],
			strerror(errno));
		return 1;
	}
	if (argc > 2) {
		fdout = open(argv[2],
			     O_CREAT | O_TRUNC | O_WRONLY | O_LARGEFILE,
			     0600);
		if (fdout < 0) {
			fprintf(stderr, "open(%s) failed: %s\n", argv[2],
				strerror(errno));
			close(fdin);
			return 1;
		}
	} else {
		fdout = fileno(stdout);
	}

	rc = parse_buffer(fdin, fdout);

	close(fdin);
	if (fdout != fileno(stdout))
		close(fdout);

	return rc;
}

const char debug_daemon_usage[] = "usage: %s {start file [MB]|stop}\n";

int jt_dbg_debug_daemon(int argc, char **argv)
{
	int rc;
	int fd;

	if (argc <= 1) {
		fprintf(stderr, debug_daemon_usage, argv[0]);
		return 1;
	}

	fd = dbg_open_ctlhandle(DAEMON_CTL_NAME);
	if (fd < 0)
		return -1;

	rc = -1;
	if (strcasecmp(argv[1], "start") == 0) {
		if (argc < 3 || argc > 4 ||
		    (argc == 4 && strlen(argv[3]) > 5)) {
			fprintf(stderr, debug_daemon_usage, argv[0]);
			goto out;
		}
		if (argc == 4) {
			char		 buf[12];
			const long	 min_size = 10;
			const long	 max_size = 20480;
			long		 size;
			char		*end;

			size = strtoul(argv[3], &end, 0);
			if (size < min_size ||
			    size > max_size ||
			    *end != 0) {
				fprintf(stderr, "size %s invalid, must be in "
					"the range %ld-%ld MB\n", argv[3],
					min_size, max_size);
				goto out;
			}
			snprintf(buf, sizeof(buf), "size=%ld", size);
			rc = dbg_write_cmd(fd, buf, strlen(buf));

			if (rc != 0) {
				fprintf(stderr, "set %s failed: %s\n",
					buf, strerror(errno));
				goto out;
			}
		}

		rc = dbg_write_cmd(fd, argv[2], strlen(argv[2]));
		if (rc != 0) {
			fprintf(stderr, "start debug_daemon on %s failed: %s\n",
				argv[2], strerror(errno));
			goto out;
		}
		rc = 0;
		goto out;
	}
	if (strcasecmp(argv[1], "stop") == 0) {
		rc = dbg_write_cmd(fd, "stop", 4);
		if (rc != 0) {
			fprintf(stderr, "stopping debug_daemon failed: %s\n",
				strerror(errno));
			goto out;
		}

		rc = 0;
		goto out;
	}

	fprintf(stderr, debug_daemon_usage, argv[0]);
	rc = -1;
out:
	dbg_close_ctlhandle(fd);
	return rc;
}

int jt_dbg_clear_debug_buf(int argc, char **argv)
{
	int			 rc;
	struct libcfs_ioctl_data data;

	if (argc != 1) {
		fprintf(stderr, "usage: %s\n", argv[0]);
		return 0;
	}

	memset(&data, 0, sizeof(data));
	if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
		fprintf(stderr, "libcfs_ioctl_pack failed.\n");
		return -1;
	}

	rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_CLEAR_DEBUG, buf);
	if (rc) {
		fprintf(stderr, "IOC_LIBCFS_CLEAR_DEBUG failed: %s\n",
			strerror(errno));
		return -1;
	}
	return 0;
}

int jt_dbg_mark_debug_buf(int argc, char **argv)
{
	static char		 scratch[MAX_MARK_SIZE] = "";
	struct libcfs_ioctl_data data;
	char			*text;
	int			 rc;

	memset(&data, 0, sizeof(data));

	if (argc > 1) {
		int count, max_size = sizeof(scratch) - 1;

		strncpy(scratch, argv[1], max_size);
		max_size -= strlen(argv[1]);
		for (count = 2; (count < argc) && (max_size > 1); count++) {
			strncat(scratch, " ", max_size);
			max_size -= 1;
			strncat(scratch, argv[count], max_size);
			max_size -= strlen(argv[count]);
		}
		scratch[sizeof(scratch) - 1] = '\0';
		text = scratch;
	} else {
		time_t now = time(NULL);
		text = ctime(&now);
	}

	data.ioc_inllen1 = strlen(text) + 1;
	data.ioc_inlbuf1 = text;

	if (libcfs_ioctl_pack(&data, &buf, max) != 0) {
		fprintf(stderr, "libcfs_ioctl_pack failed.\n");
		return -1;
	}

	rc = l_ioctl(LNET_DEV_ID, IOC_LIBCFS_MARK_DEBUG, buf);
	if (rc) {
		fprintf(stderr, "IOC_LIBCFS_MARK_DEBUG failed: %s\n",
			strerror(errno));
		return -1;
	}
	return 0;
}

static struct mod_paths {
	char *name, *path;
} mod_paths[] = {
	{ "libcfs", "libcfs/libcfs" },
	{ "lnet", "lnet/lnet" },
	{ "ko2iblnd", "lnet/klnds/o2iblnd" },
	{ "kgnilnd", "lnet/klnds/gnilnd"},
	{ "ksocklnd", "lnet/klnds/socklnd" },
	{ "obdclass", "lustre/obdclass" },
	{ "llog_test", "lustre/obdclass" },
	{ "ptlrpc_gss", "lustre/ptlrpc/gss" },
	{ "ptlrpc", "lustre/ptlrpc" },
	{ "gks", "lustre/sec/gks" },
	{ "gkc", "lustre/sec/gks" },
	{ "ost", "lustre/ost" },
	{ "osc", "lustre/osc" },
	{ "mds", "lustre/mds" },
	{ "mdc", "lustre/mdc" },
	{ "lustre", "lustre/llite" },
	{ "llite_lloop", "lustre/llite" },
	{ "ldiskfs", "ldiskfs" },
	{ "obdecho", "lustre/obdecho" },
	{ "ldlm", "lustre/ldlm" },
	{ "obdfilter", "lustre/obdfilter" },
	{ "lov", "lustre/lov" },
	{ "lmv", "lustre/lmv" },
	{ "lquota", "lustre/quota" },
	{ "mgs", "lustre/mgs" },
	{ "mgc", "lustre/mgc" },
	{ "mdt", "lustre/mdt" },
	{ "mdd", "lustre/mdd" },
	{ "osd", "lustre/osd" },
	{ "cmm", "lustre/cmm" },
	{"fid", "lustre/fid"},
	{"fld", "lustre/fld"},
	{"lod", "lustre/lod"},
	{"osp", "lustre/osp"},
	{ "lfsck", "lustre/lfsck" },
	{NULL, NULL}
};

int jt_dbg_modules(int argc, char **argv)
{
	struct mod_paths *mp;
	char		 *path = "";
	const char	 *proc = "/proc/modules";
	char		  modname[128];
	char		  buf[4096];
	unsigned long	  modaddr;
	FILE		 *file;

	if (argc >= 2)
		path = argv[1];
	if (argc > 3) {
		printf("%s [path] [kernel]\n", argv[0]);
		return 0;
	}

	file = fopen(proc, "r");
	if (!file) {
		printf("failed open %s: %s\n", proc, strerror(errno));
		return 0;
	}

	while (fgets(buf, sizeof(buf), file) != NULL) {
		if (sscanf(buf, "%s %*s %*s %*s %*s %lx",
			   modname, &modaddr) == 2) {
			for (mp = mod_paths; mp->name != NULL; mp++) {
				if (!strcmp(mp->name, modname))
					break;
			}
			if (mp->name) {
				printf("add-symbol-file %s%s%s/%s.o 0x%0lx\n",
					path, path[0] ? "/" : "",
					mp->path, mp->name, modaddr);
			}
		}
	}

	fclose(file);
	return 0;
}