[blktrace.git] / blkparse.c

/*
 * block queue tracing parse application
 *
 * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#include <signal.h>

#include "blktrace.h"
#include "rbtree.h"

#define SECONDS(x) 	((unsigned long long)(x) / 1000000000)
#define NANO_SECONDS(x)	((unsigned long long)(x) % 1000000000)

static int backwards;
static unsigned long long genesis_time, last_reported_time;

struct per_cpu_info {
	int cpu;
	int nelems;

	int fd;
	char fname[128];

	FILE *ofp;
	char ofname[128];

	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
	unsigned long ireads, iwrites;
	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
	unsigned long long iread_kb, iwrite_kb;
};

#define S_OPTS	"i:o:"
static struct option l_opts[] = {
	{
		.name = "input",
		.has_arg = 1,
		.flag = NULL,
		.val = 'i'
	},
	{
		.name = "output",
		.has_arg = 1,
		.flag = NULL,
		.val = 'o'
	},
	{
		.name = NULL,
		.has_arg = 0,
		.flag = NULL,
		.val = 0
	}
};

static struct rb_root rb_root;

struct trace {
	struct blk_io_trace *bit;
	struct rb_node rb_node;
};

static int max_cpus;
static struct per_cpu_info *per_cpu_info;

static unsigned long long events;

static char *dev, *output_name;

#define is_done()	(*(volatile int *)(&done))
static volatile int done;

static void resize_cpu_info(int cpuid)
{
	int new_space, new_max = cpuid + 1;
	char *new_start;

	per_cpu_info = realloc(per_cpu_info, new_max * sizeof(*per_cpu_info));
	if (!per_cpu_info) {
		fprintf(stderr, "Cannot allocate CPU info -- %d x %d bytes\n",
			new_max, (int) sizeof(*per_cpu_info));
		exit(1);
	}

	new_start = (char *)per_cpu_info + (max_cpus * sizeof(*per_cpu_info));
	new_space = (new_max - max_cpus) * sizeof(*per_cpu_info);
	memset(new_start, 0, new_space);
	max_cpus = new_max;
}

static struct per_cpu_info *get_cpu_info(int cpu)
{
	struct per_cpu_info *pci;

	if (cpu >= max_cpus)
		resize_cpu_info(cpu);

	/*
	 * ->cpu might already be set, but just set it unconditionally
	 */
	pci = &per_cpu_info[cpu];
	pci->cpu = cpu;

	return pci;
}

static inline void check_time(struct blk_io_trace *bit)
{
	unsigned long long this = bit->time;
	unsigned long long last = last_reported_time;

	backwards = (this < last) ? 'B' : ' ';
	last_reported_time = this;
}

static inline void account_m(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->mwrites++;
		pci->qwrite_kb += bytes >> 10;
	} else {
		pci->mreads++;
		pci->qread_kb += bytes >> 10;
	}
}

static inline void account_q(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->qwrites++;
		pci->qwrite_kb += bytes >> 10;
	} else {
		pci->qreads++;
		pci->qread_kb += bytes >> 10;
	}
}

static inline void account_c(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->cwrites++;
		pci->cwrite_kb += bytes >> 10;
	} else {
		pci->creads++;
		pci->cread_kb += bytes >> 10;
	}
}

static inline void account_i(struct per_cpu_info *pci, int rw,
			     unsigned int bytes)
{
	if (rw) {
		pci->iwrites++;
		pci->iwrite_kb += bytes >> 10;
	} else {
		pci->ireads++;
		pci->iread_kb += bytes >> 10;
	}
}

static void output(struct per_cpu_info *pci, char *s)
{
	printf("%s", s);

	if (pci->ofp)
		fprintf(pci->ofp, "%s", s);
}

static char hstring[256];
static char tstring[256];

static inline char *setup_header(struct per_cpu_info *pci,
				 struct blk_io_trace *t, char act)
{
	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
	int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
	char rwbs[4];
	int i = 0;

	if (w)
		rwbs[i++] = 'W';
	else
		rwbs[i++] = 'R';
	if (b)
		rwbs[i++] = 'B';
	if (s)
		rwbs[i++] = 'S';

	rwbs[i] = '\0';

	sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
		pci->cpu,
		(unsigned long)t->sequence, SECONDS(t->time), 
		NANO_SECONDS(t->time), t->pid, act, rwbs);

	return hstring;
}

static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t,
			 char act)
{
	sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->error);
	output(pci, tstring);
}

static void log_queue(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->comm);
	output(pci, tstring);
}

static void log_issue(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->comm);
	output(pci, tstring);
}

static void log_merge(struct per_cpu_info *pci, struct blk_io_trace *t,
		      char act)
{
	sprintf(tstring,"%s   %Lu + %u [%s]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->comm);
	output(pci, tstring);
}

static void log_generic(struct per_cpu_info *pci, struct blk_io_trace *t,
			char act)
{
	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
		(unsigned long long)t->sector, t->bytes >> 9, t->comm);
	output(pci, tstring);
}

static int log_pc(struct per_cpu_info *pci, struct blk_io_trace *t, char act)
{
	unsigned char *buf;
	int i;

	sprintf(tstring,"%s ", setup_header(pci, t, act));
	output(pci, tstring);

	buf = (unsigned char *) t + sizeof(*t);
	for (i = 0; i < t->pdu_len; i++) {
		sprintf(tstring,"%02x ", buf[i]);
		output(pci, tstring);
	}

	if (act == 'C') {
		sprintf(tstring,"[%d]\n", t->error);
		output(pci, tstring);
	} else {
		sprintf(tstring,"[%s]\n", t->comm);
		output(pci, tstring);
	}
	return 0;
}

static int dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int ret = 0;

	switch (t->action & 0xffff) {
		case __BLK_TA_QUEUE:
			log_generic(pci, t, 'Q');
			break;
		case __BLK_TA_GETRQ:
			log_generic(pci, t, 'G');
			break;
		case __BLK_TA_SLEEPRQ:
			log_generic(pci, t, 'S');
			break;
		case __BLK_TA_REQUEUE:
			log_generic(pci, t, 'R');
			break;
		case __BLK_TA_ISSUE:
			ret = log_pc(pci, t, 'D');
			break;
		case __BLK_TA_COMPLETE:
			log_pc(pci, t, 'C');
			break;
		default:
			fprintf(stderr, "Bad pc action %x\n", t->action);
			ret = 1;
			break;
	}
	
	return ret;
}

static void dump_trace_fs(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);

	switch (t->action & 0xffff) {
		case __BLK_TA_QUEUE:
			account_q(pci, w, t->bytes);
			log_queue(pci, t, 'Q');
			break;
		case __BLK_TA_BACKMERGE:
			account_m(pci, w, t->bytes);
			log_merge(pci, t, 'M');
			break;
		case __BLK_TA_FRONTMERGE:
			account_m(pci, w, t->bytes);
			log_merge(pci, t, 'F');
			break;
		case __BLK_TA_GETRQ:
			log_generic(pci, t, 'G');
			break;
		case __BLK_TA_SLEEPRQ:
			log_generic(pci, t, 'S');
			break;
		case __BLK_TA_REQUEUE:
			account_c(pci, w, -t->bytes);
			log_queue(pci, t, 'R');
			break;
		case __BLK_TA_ISSUE:
			account_i(pci, w, t->bytes);
			log_issue(pci, t, 'D');
			break;
		case __BLK_TA_COMPLETE:
			account_c(pci, w, t->bytes);
			log_complete(pci, t, 'C');
			break;
		default:
			fprintf(stderr, "Bad fs action %x\n", t->action);
			break;
	}
}

static int dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci)
{
	int ret = 0;

	if (output_name && !pci->ofp) {
		snprintf(pci->ofname, sizeof(pci->ofname) - 1,
				"%s_log.%d", output_name, pci->cpu);

		pci->ofp = fopen(pci->ofname, "w");
		if (pci->ofp == NULL) {
			perror(pci->ofname);
			return 1;
		}
	}

	if (t->action & BLK_TC_ACT(BLK_TC_PC))
		ret = dump_trace_pc(t, pci);
	else
		dump_trace_fs(t, pci);

	events++;
	return ret;
}

static void dump_pci_stats(struct per_cpu_info *pci)
{
	printf(" Reads Queued:    %'8lu, %'8LuKiB\t", pci->qreads, pci->qread_kb);
	printf(" Writes Queued:    %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);

	printf(" Read Dispatches: %'8lu, %'8LuKiB\t", pci->ireads, pci->iread_kb);
	printf(" Write Dispatches: %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	printf(" Reads Completed: %'8lu, %'8LuKiB\t", pci->creads, pci->cread_kb);
	printf(" Writes Completed: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	printf(" Read Merges:     %'8lu%8c\t", pci->mreads, ' ');

	printf(" Write Merges:     %'8lu\n", pci->mwrites);
}

static void show_stats(void)
{
	struct per_cpu_info foo, *pci;
	int i, pci_events = 0;

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

	for (i = 0; i < max_cpus; i++) {
		pci = &per_cpu_info[i];

		if (!pci->nelems)
			continue;

		foo.qreads += pci->qreads;
		foo.qwrites += pci->qwrites;
		foo.creads += pci->creads;
		foo.cwrites += pci->cwrites;
		foo.mreads += pci->mreads;
		foo.mwrites += pci->mwrites;
		foo.qread_kb += pci->qread_kb;
		foo.qwrite_kb += pci->qwrite_kb;
		foo.cread_kb += pci->cread_kb;
		foo.cwrite_kb += pci->cwrite_kb;

		printf("CPU%d:\n", i);
		dump_pci_stats(pci);
		pci_events++;
	}

	if (pci_events > 1) {
		printf("Total:\n");
		dump_pci_stats(&foo);
	}

	printf("Events: %'Lu\n", events);
}

static inline int trace_rb_insert(struct trace *t)
{
	struct rb_node **p = &rb_root.rb_node;
	struct rb_node *parent = NULL;
	struct trace *__t;

	while (*p) {
		parent = *p;
		__t = rb_entry(parent, struct trace, rb_node);

		if (t->bit->sequence < __t->bit->sequence)
			p = &(*p)->rb_left;
		else if (t->bit->sequence > __t->bit->sequence)
			p = &(*p)->rb_right;
		else {
			fprintf(stderr, "sequence alias!\n");
			return 1;
		}
	}

	rb_link_node(&t->rb_node, parent, p);
	rb_insert_color(&t->rb_node, &rb_root);
	return 0;
}

static int sort_entries(void *traces, unsigned long offset, int nr)
{
	struct per_cpu_info *pci;
	struct blk_io_trace *bit;
	struct trace *t;
	void *start = traces;
	int nelems = 0;

	while (traces - start <= offset - sizeof(*bit)) {
		if (!nr)
			break;

		bit = traces;

		t = malloc(sizeof(*t));
		t->bit = bit;
		memset(&t->rb_node, 0, sizeof(t->rb_node));

		trace_to_cpu(bit);

		if (verify_trace(bit))
			break;

		pci = get_cpu_info(bit->cpu);
		pci->nelems++;

		if (trace_rb_insert(t))
			return -1;

		traces += sizeof(*bit) + bit->pdu_len;
		nelems++;
		nr--;
	}

	return nelems;
}

static void free_entries_rb(void)
{
	struct rb_node *n;

	while ((n = rb_first(&rb_root)) != NULL) {
		struct trace *t = rb_entry(n, struct trace, rb_node);

		rb_erase(&t->rb_node, &rb_root);
		free(t);
	}
}

static void show_entries_rb(void)
{
	struct blk_io_trace *bit;
	struct rb_node *n;
	struct trace *t;
	int cpu;

	n = rb_first(&rb_root);
	if (!n)
		return;

	do {
		t = rb_entry(n, struct trace, rb_node);
		bit = t->bit;

		cpu = bit->cpu;
		if (cpu > max_cpus) {
			fprintf(stderr, "CPU number too large (%d)\n", cpu);
			break;
		}

		if (genesis_time == 0)
			genesis_time = bit->time;
		bit->time -= genesis_time;

		check_time(bit);

		if (dump_trace(bit, &per_cpu_info[cpu]))
			break;

	} while ((n = rb_next(n)) != NULL);
}

static int read_data(int fd, void *buffer, int bytes, int block)
{
	int ret, bytes_left, fl;
	void *p;

	fl = fcntl(fd, F_GETFL);

	if (!block)
		fcntl(fd, F_SETFL, fl | O_NONBLOCK);
	else
		fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);

	bytes_left = bytes;
	p = buffer;
	while (bytes_left > 0) {
		ret = read(fd, p, bytes_left);
		if (!ret)
			return 1;
		else if (ret < 0) {
			if (errno != EAGAIN)
				perror("read");
			return -1;
		} else {
			p += ret;
			bytes_left -= ret;
		}
	}

	return 0;
}

static int do_file(void)
{
	int i, nfiles;

	for (i = 0, nfiles = 0;; i++, nfiles++) {
		struct per_cpu_info *pci;
		struct stat st;
		void *tb;

		pci = get_cpu_info(i);
		pci->ofp = NULL;

		snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
		if (stat(pci->fname, &st) < 0)
			break;
		if (!st.st_size)
			continue;

		printf("Processing %s\n", pci->fname);

		tb = malloc(st.st_size);

		pci->fd = open(pci->fname, O_RDONLY);
		if (pci->fd < 0) {
			perror(pci->fname);
			break;
		}

		if (read_data(pci->fd, tb, st.st_size, 1))
			break;

		if (sort_entries(tb, st.st_size, ~0U) == -1)
			break;

		close(pci->fd);
		printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);

	}

	if (!nfiles) {
		fprintf(stderr, "No files found\n");
		return 1;
	}

	show_entries_rb();
	return 0;
}

static void resize_buffer(void **buffer, long *old_size)
{
	long cur_size = *old_size;
	void *ptr;

	*old_size *= 2;
	ptr = malloc(*old_size);
	memcpy(ptr, *buffer, cur_size);
	free(*buffer);
	*buffer = ptr;
}

static int read_sort_events(int fd, void **buffer)
{
	long offset, max_offset;
	int events;

	max_offset = 128 * sizeof(struct blk_io_trace);
	*buffer = malloc(max_offset);
	events = 0;
	offset = 0;

	do {
		struct blk_io_trace *t;
		int pdu_len;

		if (max_offset - offset < sizeof(*t))
			resize_buffer(buffer, &max_offset);

		if (read_data(fd, *buffer + offset, sizeof(*t), !events)) {
			if (events)
				break;

			usleep(1000);
			continue;
		}

		t = *buffer + offset;
		offset += sizeof(*t);

		pdu_len = be16_to_cpu(t->pdu_len);

		if (max_offset - offset < pdu_len)
			resize_buffer(buffer, &max_offset);

		if (read_data(fd, *buffer + offset, pdu_len, 1))
			break;

		offset += pdu_len;
		events++;
	} while (!is_done());

	return events;
}

static int do_stdin(void)
{
	int fd;
	void *ptr;

	fd = dup(STDIN_FILENO);
	do {
		int events;

		events = read_sort_events(fd, &ptr);
		if (!events)
			break;
	
		sort_entries(ptr, ~0UL, events);
		show_entries_rb();
		free_entries_rb();
	} while (1);

	close(fd);
	free(ptr);
	return 0;
}

static void flush_output(void)
{
	int i;

	for (i = 0; i < max_cpus; i++) {
		struct per_cpu_info *pci = &per_cpu_info[i];

		if (pci->ofp) {
			fflush(pci->ofp);
			fclose(pci->ofp);
			pci->ofp = NULL;
		}
	}
}

static void handle_sigint(int sig)
{
	done = 1;
	flush_output();
}

static void usage(char *prog)
{
	fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog);
}

int main(int argc, char *argv[])
{
	int c, ret;

	while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
		switch (c) {
		case 'i':
			dev = strdup(optarg);
			break;
		case 'o':
			output_name = strdup(optarg);
			break;
		default:
			usage(argv[0]);
			return 1;
		}
	}

	if (!dev) {
		usage(argv[0]);
		return 1;
	}

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

	signal(SIGINT, handle_sigint);
	signal(SIGHUP, handle_sigint);
	signal(SIGTERM, handle_sigint);

	if (!strcmp(dev, "-"))
		ret = do_stdin();
	else
		ret = do_file();

	show_stats();
	flush_output();
	return ret;
}
Commit	Line	Data
d956a2cd JA	1	/*
	2	* block queue tracing parse application
	3	*
	4	* Copyright (C) 2005 Jens Axboe <axboe@suse.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
d0ca268b JA	21	#include <sys/types.h>
	22	#include <sys/stat.h>
	23	#include <unistd.h>
	24	#include <stdio.h>
	25	#include <fcntl.h>
	26	#include <stdlib.h>
8fc0abbc	27	#include <string.h>
d5396421	28	#include <getopt.h>
412819ce JA	29	#include <errno.h>
412819ce JA	30	#include <signal.h>
d0ca268b	31
8fc0abbc JA	32	#include "blktrace.h"
8fc0abbc JA	33	#include "rbtree.h"
d0ca268b	34
cfab07eb AB	35	#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
	36	#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
	37
d5396421 JA	38	static int backwards;
	39	static unsigned long long genesis_time, last_reported_time;
	40
	41	struct per_cpu_info {
d0ca268b JA	42	int cpu;
d0ca268b JA	43	int nelems;
d0ca268b JA	44
d0ca268b JA	45	int fd;
87b72777	46	char fname[128];
d0ca268b	47
87b72777 JA	48	FILE *ofp;
87b72777 JA	49	char ofname[128];
8fc0abbc	50
5c017e4b	51	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
afd2d7ad	52	unsigned long ireads, iwrites;
5c017e4b	53	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
afd2d7ad	54	unsigned long long iread_kb, iwrite_kb;
d0ca268b JA	55	};
d0ca268b JA	56
d5396421 JA	57	#define S_OPTS "i:o:"
	58	static struct option l_opts[] = {
	59	{
	60	.name = "input",
	61	.has_arg = 1,
	62	.flag = NULL,
	63	.val = 'i'
	64	},
	65	{
	66	.name = "output",
	67	.has_arg = 1,
	68	.flag = NULL,
	69	.val = 'o'
	70	},
	71	{
	72	.name = NULL,
	73	.has_arg = 0,
	74	.flag = NULL,
	75	.val = 0
	76	}
	77	};
	78
8fc0abbc JA	79	static struct rb_root rb_root;
	80
	81	struct trace {
	82	struct blk_io_trace *bit;
	83	struct rb_node rb_node;
	84	};
	85
a718bd37 NS	86	static int max_cpus;
a718bd37 NS	87	static struct per_cpu_info *per_cpu_info;
d0ca268b	88
87b72777 JA	89	static unsigned long long events;
87b72777 JA	90
d5396421	91	static char dev, output_name;
d0ca268b	92
412819ce JA	93	#define is_done() ((volatile int )(&done))
	94	static volatile int done;
	95
a718bd37 NS	96	static void resize_cpu_info(int cpuid)
	97	{
	98	int new_space, new_max = cpuid + 1;
	99	char *new_start;
	100
	101	per_cpu_info = realloc(per_cpu_info, new_max * sizeof(*per_cpu_info));
	102	if (!per_cpu_info) {
	103	fprintf(stderr, "Cannot allocate CPU info -- %d x %d bytes\n",
	104	new_max, (int) sizeof(*per_cpu_info));
	105	exit(1);
	106	}
	107
	108	new_start = (char )per_cpu_info + (max_cpus sizeof(*per_cpu_info));
	109	new_space = (new_max - max_cpus) * sizeof(*per_cpu_info);
	110	memset(new_start, 0, new_space);
	111	max_cpus = new_max;
	112	}
	113
	114	static struct per_cpu_info *get_cpu_info(int cpu)
	115	{
c499bf38 JA	116	struct per_cpu_info *pci;
c499bf38 JA	117
a718bd37 NS	118	if (cpu >= max_cpus)
	119	resize_cpu_info(cpu);
	120
c499bf38 JA	121	/*
	122	* ->cpu might already be set, but just set it unconditionally
	123	*/
	124	pci = &per_cpu_info[cpu];
	125	pci->cpu = cpu;
	126
	127	return pci;
a718bd37 NS	128	}
a718bd37 NS	129
cfab07eb AB	130	static inline void check_time(struct blk_io_trace *bit)
	131	{
	132	unsigned long long this = bit->time;
	133	unsigned long long last = last_reported_time;
	134
	135	backwards = (this < last) ? 'B' : ' ';
	136	last_reported_time = this;
	137	}
	138
d5396421	139	static inline void account_m(struct per_cpu_info *pci, int rw,
5c017e4b	140	unsigned int bytes)
d0ca268b JA	141	{
d0ca268b JA	142	if (rw) {
d5396421 JA	143	pci->mwrites++;
d5396421 JA	144	pci->qwrite_kb += bytes >> 10;
d0ca268b	145	} else {
d5396421 JA	146	pci->mreads++;
d5396421 JA	147	pci->qread_kb += bytes >> 10;
d0ca268b JA	148	}
	149	}
	150
d5396421	151	static inline void account_q(struct per_cpu_info *pci, int rw,
5c017e4b	152	unsigned int bytes)
d0ca268b JA	153	{
d0ca268b JA	154	if (rw) {
d5396421 JA	155	pci->qwrites++;
d5396421 JA	156	pci->qwrite_kb += bytes >> 10;
d0ca268b	157	} else {
d5396421 JA	158	pci->qreads++;
d5396421 JA	159	pci->qread_kb += bytes >> 10;
d0ca268b JA	160	}
	161	}
	162
d5396421	163	static inline void account_c(struct per_cpu_info *pci, int rw,
5c017e4b	164	unsigned int bytes)
d0ca268b JA	165	{
d0ca268b JA	166	if (rw) {
d5396421 JA	167	pci->cwrites++;
d5396421 JA	168	pci->cwrite_kb += bytes >> 10;
d0ca268b	169	} else {
d5396421 JA	170	pci->creads++;
d5396421 JA	171	pci->cread_kb += bytes >> 10;
d0ca268b JA	172	}
	173	}
	174
d5396421	175	static inline void account_i(struct per_cpu_info *pci, int rw,
afd2d7ad	176	unsigned int bytes)
	177	{
	178	if (rw) {
d5396421 JA	179	pci->iwrites++;
d5396421 JA	180	pci->iwrite_kb += bytes >> 10;
afd2d7ad	181	} else {
d5396421 JA	182	pci->ireads++;
d5396421 JA	183	pci->iread_kb += bytes >> 10;
afd2d7ad	184	}
	185	}
	186
d5396421	187	static void output(struct per_cpu_info pci, char s)
d0ca268b JA	188	{
d0ca268b JA	189	printf("%s", s);
d5396421 JA	190
d5396421 JA	191	if (pci->ofp)
33b56019	192	fprintf(pci->ofp, "%s", s);
d0ca268b JA	193	}
d0ca268b JA	194
3aabcd89 JA	195	static char hstring[256];
3aabcd89 JA	196	static char tstring[256];
d0ca268b	197
d5396421 JA	198	static inline char setup_header(struct per_cpu_info pci,
d5396421 JA	199	struct blk_io_trace *t, char act)
d0ca268b JA	200	{
	201	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	202	int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
	203	int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
	204	char rwbs[4];
	205	int i = 0;
	206
	207	if (w)
	208	rwbs[i++] = 'W';
	209	else
	210	rwbs[i++] = 'R';
	211	if (b)
	212	rwbs[i++] = 'B';
	213	if (s)
	214	rwbs[i++] = 'S';
	215
	216	rwbs[i] = '\0';
	217
cfab07eb	218	sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
d5396421	219	pci->cpu,
cfab07eb AB	220	(unsigned long)t->sequence, SECONDS(t->time),
cfab07eb AB	221	NANO_SECONDS(t->time), t->pid, act, rwbs);
d0ca268b JA	222
	223	return hstring;
	224	}
	225
d5396421 JA	226	static void log_complete(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	227	char act)
d0ca268b	228	{
d5396421	229	sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
d0ca268b	230	(unsigned long long)t->sector, t->bytes >> 9, t->error);
d5396421	231	output(pci, tstring);
d0ca268b JA	232	}
d0ca268b JA	233
d5396421 JA	234	static void log_queue(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	235	char act)
d0ca268b	236	{
2955af9d NS	237	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
2955af9d NS	238	(unsigned long long)t->sector, t->bytes >> 9, t->comm);
d5396421	239	output(pci, tstring);
d0ca268b JA	240	}
d0ca268b JA	241
d5396421 JA	242	static void log_issue(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	243	char act)
d0ca268b	244	{
2955af9d NS	245	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
2955af9d NS	246	(unsigned long long)t->sector, t->bytes >> 9, t->comm);
d5396421	247	output(pci, tstring);
d0ca268b JA	248	}
d0ca268b JA	249
d5396421 JA	250	static void log_merge(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	251	char act)
d0ca268b	252	{
2955af9d NS	253	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
2955af9d NS	254	(unsigned long long)t->sector, t->bytes >> 9, t->comm);
d5396421	255	output(pci, tstring);
d0ca268b JA	256	}
d0ca268b JA	257
d5396421 JA	258	static void log_generic(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	259	char act)
d0ca268b	260	{
2955af9d NS	261	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
2955af9d NS	262	(unsigned long long)t->sector, t->bytes >> 9, t->comm);
d5396421	263	output(pci, tstring);
d0ca268b JA	264	}
d0ca268b JA	265
d5396421	266	static int log_pc(struct per_cpu_info pci, struct blk_io_trace t, char act)
d0ca268b	267	{
87b72777 JA	268	unsigned char *buf;
87b72777 JA	269	int i;
d0ca268b	270
d5396421 JA	271	sprintf(tstring,"%s ", setup_header(pci, t, act));
d5396421 JA	272	output(pci, tstring);
d0ca268b	273
87b72777	274	buf = (unsigned char ) t + sizeof(t);
d0ca268b JA	275	for (i = 0; i < t->pdu_len; i++) {
d0ca268b JA	276	sprintf(tstring,"%02x ", buf[i]);
d5396421	277	output(pci, tstring);
d0ca268b JA	278	}
	279
	280	if (act == 'C') {
2955af9d NS	281	sprintf(tstring,"[%d]\n", t->error);
	282	output(pci, tstring);
	283	} else {
	284	sprintf(tstring,"[%s]\n", t->comm);
d5396421	285	output(pci, tstring);
d0ca268b	286	}
87b72777	287	return 0;
d0ca268b JA	288	}
d0ca268b JA	289
d5396421	290	static int dump_trace_pc(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	291	{
87b72777 JA	292	int ret = 0;
87b72777 JA	293
d0ca268b JA	294	switch (t->action & 0xffff) {
d0ca268b JA	295	case __BLK_TA_QUEUE:
d5396421	296	log_generic(pci, t, 'Q');
d0ca268b JA	297	break;
d0ca268b JA	298	case __BLK_TA_GETRQ:
d5396421	299	log_generic(pci, t, 'G');
d0ca268b JA	300	break;
d0ca268b JA	301	case __BLK_TA_SLEEPRQ:
d5396421	302	log_generic(pci, t, 'S');
d0ca268b JA	303	break;
d0ca268b JA	304	case __BLK_TA_REQUEUE:
d5396421	305	log_generic(pci, t, 'R');
d0ca268b JA	306	break;
d0ca268b JA	307	case __BLK_TA_ISSUE:
d5396421	308	ret = log_pc(pci, t, 'D');
d0ca268b JA	309	break;
d0ca268b JA	310	case __BLK_TA_COMPLETE:
d5396421	311	log_pc(pci, t, 'C');
d0ca268b JA	312	break;
	313	default:
	314	fprintf(stderr, "Bad pc action %x\n", t->action);
87b72777 JA	315	ret = 1;
87b72777 JA	316	break;
d0ca268b JA	317	}
d0ca268b JA	318
87b72777	319	return ret;
d0ca268b JA	320	}
d0ca268b JA	321
d5396421	322	static void dump_trace_fs(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b JA	323	{
	324	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	325
	326	switch (t->action & 0xffff) {
	327	case __BLK_TA_QUEUE:
d5396421 JA	328	account_q(pci, w, t->bytes);
d5396421 JA	329	log_queue(pci, t, 'Q');
d0ca268b JA	330	break;
d0ca268b JA	331	case __BLK_TA_BACKMERGE:
d5396421 JA	332	account_m(pci, w, t->bytes);
d5396421 JA	333	log_merge(pci, t, 'M');
d0ca268b JA	334	break;
d0ca268b JA	335	case __BLK_TA_FRONTMERGE:
d5396421 JA	336	account_m(pci, w, t->bytes);
d5396421 JA	337	log_merge(pci, t, 'F');
d0ca268b JA	338	break;
d0ca268b JA	339	case __BLK_TA_GETRQ:
d5396421	340	log_generic(pci, t, 'G');
d0ca268b JA	341	break;
d0ca268b JA	342	case __BLK_TA_SLEEPRQ:
d5396421	343	log_generic(pci, t, 'S');
d0ca268b JA	344	break;
d0ca268b JA	345	case __BLK_TA_REQUEUE:
d5396421 JA	346	account_c(pci, w, -t->bytes);
d5396421 JA	347	log_queue(pci, t, 'R');
d0ca268b JA	348	break;
d0ca268b JA	349	case __BLK_TA_ISSUE:
d5396421 JA	350	account_i(pci, w, t->bytes);
d5396421 JA	351	log_issue(pci, t, 'D');
d0ca268b JA	352	break;
d0ca268b JA	353	case __BLK_TA_COMPLETE:
d5396421 JA	354	account_c(pci, w, t->bytes);
d5396421 JA	355	log_complete(pci, t, 'C');
d0ca268b JA	356	break;
	357	default:
	358	fprintf(stderr, "Bad fs action %x\n", t->action);
1f79c4a0	359	break;
d0ca268b	360	}
d0ca268b JA	361	}
d0ca268b JA	362
d5396421	363	static int dump_trace(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	364	{
87b72777 JA	365	int ret = 0;
87b72777 JA	366
33b56019 JA	367	if (output_name && !pci->ofp) {
	368	snprintf(pci->ofname, sizeof(pci->ofname) - 1,
	369	"%s_log.%d", output_name, pci->cpu);
	370
	371	pci->ofp = fopen(pci->ofname, "w");
	372	if (pci->ofp == NULL) {
	373	perror(pci->ofname);
	374	return 1;
	375	}
	376	}
	377
d0ca268b	378	if (t->action & BLK_TC_ACT(BLK_TC_PC))
d5396421	379	ret = dump_trace_pc(t, pci);
d0ca268b	380	else
d5396421	381	dump_trace_fs(t, pci);
87b72777 JA	382
	383	events++;
	384	return ret;
d0ca268b JA	385	}
d0ca268b JA	386
d5396421	387	static void dump_pci_stats(struct per_cpu_info *pci)
5c017e4b	388	{
0a6b8fc4 NS	389	printf(" Reads Queued: %'8lu, %'8LuKiB\t", pci->qreads, pci->qread_kb);
	390	printf(" Writes Queued: %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);
	391
	392	printf(" Read Dispatches: %'8lu, %'8LuKiB\t", pci->ireads, pci->iread_kb);
	393	printf(" Write Dispatches: %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	394	printf(" Reads Completed: %'8lu, %'8LuKiB\t", pci->creads, pci->cread_kb);
	395	printf(" Writes Completed: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	396	printf(" Read Merges: %'8lu%8c\t", pci->mreads, ' ');
	397
	398	printf(" Write Merges: %'8lu\n", pci->mwrites);
5c017e4b JA	399	}
5c017e4b JA	400
d5396421	401	static void show_stats(void)
d0ca268b	402	{
d5396421	403	struct per_cpu_info foo, *pci;
412819ce	404	int i, pci_events = 0;
5c017e4b JA	405
5c017e4b JA	406	memset(&foo, 0, sizeof(foo));
d0ca268b	407
a718bd37	408	for (i = 0; i < max_cpus; i++) {
d5396421	409	pci = &per_cpu_info[i];
5c017e4b	410
d5396421	411	if (!pci->nelems)
afd2d7ad	412	continue;
afd2d7ad	413
d5396421 JA	414	foo.qreads += pci->qreads;
	415	foo.qwrites += pci->qwrites;
	416	foo.creads += pci->creads;
	417	foo.cwrites += pci->cwrites;
	418	foo.mreads += pci->mreads;
	419	foo.mwrites += pci->mwrites;
	420	foo.qread_kb += pci->qread_kb;
	421	foo.qwrite_kb += pci->qwrite_kb;
	422	foo.cread_kb += pci->cread_kb;
	423	foo.cwrite_kb += pci->cwrite_kb;
5c017e4b JA	424
5c017e4b JA	425	printf("CPU%d:\n", i);
d5396421	426	dump_pci_stats(pci);
412819ce	427	pci_events++;
5c017e4b JA	428	}
5c017e4b JA	429
412819ce	430	if (pci_events > 1) {
5c017e4b	431	printf("Total:\n");
d5396421	432	dump_pci_stats(&foo);
5c017e4b	433	}
d0ca268b JA	434
d0ca268b JA	435	printf("Events: %'Lu\n", events);
d0ca268b JA	436	}
d0ca268b JA	437
3aabcd89	438	static inline int trace_rb_insert(struct trace *t)
8fc0abbc JA	439	{
	440	struct rb_node **p = &rb_root.rb_node;
	441	struct rb_node *parent = NULL;
	442	struct trace *__t;
	443
	444	while (*p) {
	445	parent = *p;
	446	__t = rb_entry(parent, struct trace, rb_node);
	447
	448	if (t->bit->sequence < __t->bit->sequence)
	449	p = &(*p)->rb_left;
	450	else if (t->bit->sequence > __t->bit->sequence)
	451	p = &(*p)->rb_right;
	452	else {
87b72777	453	fprintf(stderr, "sequence alias!\n");
8fc0abbc JA	454	return 1;
	455	}
	456	}
	457
	458	rb_link_node(&t->rb_node, parent, p);
	459	rb_insert_color(&t->rb_node, &rb_root);
	460	return 0;
	461	}
	462
412819ce	463	static int sort_entries(void *traces, unsigned long offset, int nr)
8fc0abbc	464	{
412819ce	465	struct per_cpu_info *pci;
8fc0abbc JA	466	struct blk_io_trace *bit;
	467	struct trace *t;
	468	void *start = traces;
	469	int nelems = 0;
	470
6fe4709e	471	while (traces - start <= offset - sizeof(*bit)) {
412819ce JA	472	if (!nr)
	473	break;
	474
8fc0abbc	475	bit = traces;
6fe4709e	476
8fc0abbc JA	477	t = malloc(sizeof(*t));
	478	t->bit = bit;
	479	memset(&t->rb_node, 0, sizeof(t->rb_node));
	480
6fe4709e JA	481	trace_to_cpu(bit);
6fe4709e JA	482
66fa7233 JA	483	if (verify_trace(bit))
	484	break;
	485
a718bd37	486	pci = get_cpu_info(bit->cpu);
412819ce JA	487	pci->nelems++;
412819ce JA	488
8fc0abbc JA	489	if (trace_rb_insert(t))
	490	return -1;
	491
	492	traces += sizeof(*bit) + bit->pdu_len;
	493	nelems++;
412819ce	494	nr--;
6fe4709e	495	}
8fc0abbc JA	496
	497	return nelems;
	498	}
	499
412819ce JA	500	static void free_entries_rb(void)
	501	{
	502	struct rb_node *n;
	503
	504	while ((n = rb_first(&rb_root)) != NULL) {
	505	struct trace *t = rb_entry(n, struct trace, rb_node);
	506
	507	rb_erase(&t->rb_node, &rb_root);
	508	free(t);
	509	}
	510	}
	511
d5396421	512	static void show_entries_rb(void)
8fc0abbc	513	{
8fc0abbc	514	struct blk_io_trace *bit;
3aabcd89	515	struct rb_node *n;
8fc0abbc JA	516	struct trace *t;
	517	int cpu;
	518
3aabcd89 JA	519	n = rb_first(&rb_root);
	520	if (!n)
	521	return;
8fc0abbc	522
3aabcd89	523	do {
8fc0abbc JA	524	t = rb_entry(n, struct trace, rb_node);
	525	bit = t->bit;
	526
d5396421	527	cpu = bit->cpu;
87b72777	528	if (cpu > max_cpus) {
8fc0abbc	529	fprintf(stderr, "CPU number too large (%d)\n", cpu);
87b72777	530	break;
8fc0abbc JA	531	}
8fc0abbc JA	532
cfab07eb AB	533	if (genesis_time == 0)
	534	genesis_time = bit->time;
	535	bit->time -= genesis_time;
8fc0abbc	536
cfab07eb	537	check_time(bit);
8fc0abbc	538
d5396421	539	if (dump_trace(bit, &per_cpu_info[cpu]))
87b72777 JA	540	break;
87b72777 JA	541
8fc0abbc JA	542	} while ((n = rb_next(n)) != NULL);
	543	}
	544
1f79c4a0 JA	545	static int read_data(int fd, void *buffer, int bytes, int block)
	546	{
	547	int ret, bytes_left, fl;
	548	void *p;
	549
	550	fl = fcntl(fd, F_GETFL);
	551
	552	if (!block)
	553	fcntl(fd, F_SETFL, fl \| O_NONBLOCK);
	554	else
	555	fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);
	556
	557	bytes_left = bytes;
	558	p = buffer;
	559	while (bytes_left > 0) {
	560	ret = read(fd, p, bytes_left);
	561	if (!ret)
	562	return 1;
	563	else if (ret < 0) {
	564	if (errno != EAGAIN)
	565	perror("read");
	566	return -1;
	567	} else {
	568	p += ret;
	569	bytes_left -= ret;
	570	}
	571	}
	572
	573	return 0;
	574	}
	575
d5396421	576	static int do_file(void)
d0ca268b	577	{
a718bd37	578	int i, nfiles;
d0ca268b	579
a718bd37 NS	580	for (i = 0, nfiles = 0;; i++, nfiles++) {
a718bd37 NS	581	struct per_cpu_info *pci;
87b72777 JA	582	struct stat st;
	583	void *tb;
	584
a718bd37	585	pci = get_cpu_info(i);
d5396421	586	pci->ofp = NULL;
d0ca268b	587
d5396421 JA	588	snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
d5396421 JA	589	if (stat(pci->fname, &st) < 0)
d0ca268b	590	break;
afd2d7ad	591	if (!st.st_size)
afd2d7ad	592	continue;
d0ca268b	593
d5396421	594	printf("Processing %s\n", pci->fname);
8fc0abbc	595
87b72777	596	tb = malloc(st.st_size);
8fc0abbc	597
d5396421 JA	598	pci->fd = open(pci->fname, O_RDONLY);
	599	if (pci->fd < 0) {
	600	perror(pci->fname);
3aabcd89	601	break;
d0ca268b	602	}
afd2d7ad	603
1f79c4a0	604	if (read_data(pci->fd, tb, st.st_size, 1))
3aabcd89	605	break;
d0ca268b	606
a718bd37	607	if (sort_entries(tb, st.st_size, ~0U) == -1)
3aabcd89	608	break;
d0ca268b	609
d5396421	610	close(pci->fd);
d5396421 JA	611	printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);
	612
	613	}
	614
	615	if (!nfiles) {
	616	fprintf(stderr, "No files found\n");
	617	return 1;
	618	}
	619
	620	show_entries_rb();
d5396421 JA	621	return 0;
	622	}
	623
412819ce	624	static void resize_buffer(void *buffer, long old_size)
d5396421	625	{
412819ce	626	long cur_size = *old_size;
d5396421 JA	627	void *ptr;
d5396421 JA	628
412819ce JA	629	old_size = 2;
	630	ptr = malloc(*old_size);
	631	memcpy(ptr, *buffer, cur_size);
	632	free(*buffer);
	633	*buffer = ptr;
	634	}
d5396421	635
412819ce JA	636	static int read_sort_events(int fd, void **buffer)
	637	{
	638	long offset, max_offset;
	639	int events;
d5396421	640
412819ce JA	641	max_offset = 128 * sizeof(struct blk_io_trace);
	642	*buffer = malloc(max_offset);
	643	events = 0;
	644	offset = 0;
d5396421	645
412819ce JA	646	do {
	647	struct blk_io_trace *t;
	648	int pdu_len;
d5396421	649
412819ce JA	650	if (max_offset - offset < sizeof(*t))
412819ce JA	651	resize_buffer(buffer, &max_offset);
d5396421	652
412819ce JA	653	if (read_data(fd, buffer + offset, sizeof(t), !events)) {
412819ce JA	654	if (events)
d5396421	655	break;
412819ce JA	656
	657	usleep(1000);
	658	continue;
d5396421 JA	659	}
d5396421 JA	660
412819ce JA	661	t = *buffer + offset;
412819ce JA	662	offset += sizeof(*t);
d5396421	663
412819ce	664	pdu_len = be16_to_cpu(t->pdu_len);
d5396421	665
412819ce JA	666	if (max_offset - offset < pdu_len)
412819ce JA	667	resize_buffer(buffer, &max_offset);
d5396421	668
412819ce JA	669	if (read_data(fd, *buffer + offset, pdu_len, 1))
412819ce JA	670	break;
d5396421	671
412819ce JA	672	offset += pdu_len;
	673	events++;
	674	} while (!is_done());
d5396421	675
412819ce JA	676	return events;
412819ce JA	677	}
d5396421	678
412819ce JA	679	static int do_stdin(void)
	680	{
	681	int fd;
	682	void *ptr;
d5396421	683
1f79c4a0	684	fd = dup(STDIN_FILENO);
412819ce JA	685	do {
412819ce JA	686	int events;
d5396421	687
412819ce JA	688	events = read_sort_events(fd, &ptr);
	689	if (!events)
	690	break;
	691
	692	sort_entries(ptr, ~0UL, events);
	693	show_entries_rb();
	694	free_entries_rb();
d5396421 JA	695	} while (1);
	696
	697	close(fd);
	698	free(ptr);
d5396421 JA	699	return 0;
d5396421 JA	700	}
d0ca268b	701
1f79c4a0	702	static void flush_output(void)
412819ce JA	703	{
	704	int i;
	705
a718bd37	706	for (i = 0; i < max_cpus; i++) {
412819ce JA	707	struct per_cpu_info *pci = &per_cpu_info[i];
	708
	709	if (pci->ofp) {
	710	fflush(pci->ofp);
	711	fclose(pci->ofp);
	712	pci->ofp = NULL;
	713	}
	714	}
	715	}
	716
1f79c4a0	717	static void handle_sigint(int sig)
412819ce JA	718	{
	719	done = 1;
	720	flush_output();
	721	}
	722
1f79c4a0 JA	723	static void usage(char *prog)
	724	{
	725	fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog);
	726	}
	727
d5396421 JA	728	int main(int argc, char *argv[])
d5396421 JA	729	{
412819ce	730	int c, ret;
d5396421 JA	731
	732	while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
	733	switch (c) {
	734	case 'i':
	735	dev = strdup(optarg);
	736	break;
	737	case 'o':
	738	output_name = strdup(optarg);
	739	break;
	740	default:
1f79c4a0	741	usage(argv[0]);
d5396421 JA	742	return 1;
d5396421 JA	743	}
d0ca268b JA	744	}
d0ca268b JA	745
d5396421	746	if (!dev) {
1f79c4a0	747	usage(argv[0]);
d5396421 JA	748	return 1;
	749	}
	750
412819ce JA	751	memset(&rb_root, 0, sizeof(rb_root));
	752
	753	signal(SIGINT, handle_sigint);
	754	signal(SIGHUP, handle_sigint);
	755	signal(SIGTERM, handle_sigint);
d5396421 JA	756
	757	if (!strcmp(dev, "-"))
	758	ret = do_stdin();
	759	else
	760	ret = do_file();
	761
412819ce JA	762	show_stats();
412819ce JA	763	flush_output();
d5396421	764	return ret;
d0ca268b	765	}