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

	return &per_cpu_info[cpu];
}

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("\tReads:\n");
	printf("\t\tQueued:    %'8lu, %'8LuKiB\n", pci->qreads, pci->qread_kb);
	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->ireads, pci->iread_kb);
	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->creads, pci->cread_kb);
	printf("\t\tMerges:    %'8lu\n", pci->mreads);

	printf("\tWrites:\n");
	printf("\t\tQueued:    %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);
	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	printf("\t\tMerges:    %'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->cpu = 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	{
	116	if (cpu >= max_cpus)
	117	resize_cpu_info(cpu);
	118
	119	return &per_cpu_info[cpu];
	120	}
	121
cfab07eb AB	122	static inline void check_time(struct blk_io_trace *bit)
	123	{
	124	unsigned long long this = bit->time;
	125	unsigned long long last = last_reported_time;
	126
	127	backwards = (this < last) ? 'B' : ' ';
	128	last_reported_time = this;
	129	}
	130
d5396421	131	static inline void account_m(struct per_cpu_info *pci, int rw,
5c017e4b	132	unsigned int bytes)
d0ca268b JA	133	{
d0ca268b JA	134	if (rw) {
d5396421 JA	135	pci->mwrites++;
d5396421 JA	136	pci->qwrite_kb += bytes >> 10;
d0ca268b	137	} else {
d5396421 JA	138	pci->mreads++;
d5396421 JA	139	pci->qread_kb += bytes >> 10;
d0ca268b JA	140	}
	141	}
	142
d5396421	143	static inline void account_q(struct per_cpu_info *pci, int rw,
5c017e4b	144	unsigned int bytes)
d0ca268b JA	145	{
d0ca268b JA	146	if (rw) {
d5396421 JA	147	pci->qwrites++;
d5396421 JA	148	pci->qwrite_kb += bytes >> 10;
d0ca268b	149	} else {
d5396421 JA	150	pci->qreads++;
d5396421 JA	151	pci->qread_kb += bytes >> 10;
d0ca268b JA	152	}
	153	}
	154
d5396421	155	static inline void account_c(struct per_cpu_info *pci, int rw,
5c017e4b	156	unsigned int bytes)
d0ca268b JA	157	{
d0ca268b JA	158	if (rw) {
d5396421 JA	159	pci->cwrites++;
d5396421 JA	160	pci->cwrite_kb += bytes >> 10;
d0ca268b	161	} else {
d5396421 JA	162	pci->creads++;
d5396421 JA	163	pci->cread_kb += bytes >> 10;
d0ca268b JA	164	}
	165	}
	166
d5396421	167	static inline void account_i(struct per_cpu_info *pci, int rw,
afd2d7ad	168	unsigned int bytes)
	169	{
	170	if (rw) {
d5396421 JA	171	pci->iwrites++;
d5396421 JA	172	pci->iwrite_kb += bytes >> 10;
afd2d7ad	173	} else {
d5396421 JA	174	pci->ireads++;
d5396421 JA	175	pci->iread_kb += bytes >> 10;
afd2d7ad	176	}
	177	}
	178
d5396421	179	static void output(struct per_cpu_info pci, char s)
d0ca268b JA	180	{
d0ca268b JA	181	printf("%s", s);
d5396421 JA	182
d5396421 JA	183	if (pci->ofp)
33b56019	184	fprintf(pci->ofp, "%s", s);
d0ca268b JA	185	}
d0ca268b JA	186
3aabcd89 JA	187	static char hstring[256];
3aabcd89 JA	188	static char tstring[256];
d0ca268b	189
d5396421 JA	190	static inline char setup_header(struct per_cpu_info pci,
d5396421 JA	191	struct blk_io_trace *t, char act)
d0ca268b JA	192	{
	193	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	194	int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
	195	int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
	196	char rwbs[4];
	197	int i = 0;
	198
	199	if (w)
	200	rwbs[i++] = 'W';
	201	else
	202	rwbs[i++] = 'R';
	203	if (b)
	204	rwbs[i++] = 'B';
	205	if (s)
	206	rwbs[i++] = 'S';
	207
	208	rwbs[i] = '\0';
	209
cfab07eb	210	sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
d5396421	211	pci->cpu,
cfab07eb AB	212	(unsigned long)t->sequence, SECONDS(t->time),
cfab07eb AB	213	NANO_SECONDS(t->time), t->pid, act, rwbs);
d0ca268b JA	214
	215	return hstring;
	216	}
	217
d5396421 JA	218	static void log_complete(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	219	char act)
d0ca268b	220	{
d5396421	221	sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
d0ca268b	222	(unsigned long long)t->sector, t->bytes >> 9, t->error);
d5396421	223	output(pci, tstring);
d0ca268b JA	224	}
d0ca268b JA	225
d5396421 JA	226	static void log_queue(struct per_cpu_info pci, struct blk_io_trace t,
d5396421 JA	227	char act)
d0ca268b	228	{
2955af9d NS	229	sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
2955af9d NS	230	(unsigned long long)t->sector, t->bytes >> 9, t->comm);
d5396421	231	output(pci, tstring);
d0ca268b JA	232	}
d0ca268b JA	233
d5396421 JA	234	static void log_issue(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_merge(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_generic(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	258	static int log_pc(struct per_cpu_info pci, struct blk_io_trace t, char act)
d0ca268b	259	{
87b72777 JA	260	unsigned char *buf;
87b72777 JA	261	int i;
d0ca268b	262
d5396421 JA	263	sprintf(tstring,"%s ", setup_header(pci, t, act));
d5396421 JA	264	output(pci, tstring);
d0ca268b	265
87b72777	266	buf = (unsigned char ) t + sizeof(t);
d0ca268b JA	267	for (i = 0; i < t->pdu_len; i++) {
d0ca268b JA	268	sprintf(tstring,"%02x ", buf[i]);
d5396421	269	output(pci, tstring);
d0ca268b JA	270	}
	271
	272	if (act == 'C') {
2955af9d NS	273	sprintf(tstring,"[%d]\n", t->error);
	274	output(pci, tstring);
	275	} else {
	276	sprintf(tstring,"[%s]\n", t->comm);
d5396421	277	output(pci, tstring);
d0ca268b	278	}
87b72777	279	return 0;
d0ca268b JA	280	}
d0ca268b JA	281
d5396421	282	static int dump_trace_pc(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	283	{
87b72777 JA	284	int ret = 0;
87b72777 JA	285
d0ca268b JA	286	switch (t->action & 0xffff) {
d0ca268b JA	287	case __BLK_TA_QUEUE:
d5396421	288	log_generic(pci, t, 'Q');
d0ca268b JA	289	break;
d0ca268b JA	290	case __BLK_TA_GETRQ:
d5396421	291	log_generic(pci, t, 'G');
d0ca268b JA	292	break;
d0ca268b JA	293	case __BLK_TA_SLEEPRQ:
d5396421	294	log_generic(pci, t, 'S');
d0ca268b JA	295	break;
d0ca268b JA	296	case __BLK_TA_REQUEUE:
d5396421	297	log_generic(pci, t, 'R');
d0ca268b JA	298	break;
d0ca268b JA	299	case __BLK_TA_ISSUE:
d5396421	300	ret = log_pc(pci, t, 'D');
d0ca268b JA	301	break;
d0ca268b JA	302	case __BLK_TA_COMPLETE:
d5396421	303	log_pc(pci, t, 'C');
d0ca268b JA	304	break;
	305	default:
	306	fprintf(stderr, "Bad pc action %x\n", t->action);
87b72777 JA	307	ret = 1;
87b72777 JA	308	break;
d0ca268b JA	309	}
d0ca268b JA	310
87b72777	311	return ret;
d0ca268b JA	312	}
d0ca268b JA	313
d5396421	314	static void dump_trace_fs(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b JA	315	{
	316	int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
	317
	318	switch (t->action & 0xffff) {
	319	case __BLK_TA_QUEUE:
d5396421 JA	320	account_q(pci, w, t->bytes);
d5396421 JA	321	log_queue(pci, t, 'Q');
d0ca268b JA	322	break;
d0ca268b JA	323	case __BLK_TA_BACKMERGE:
d5396421 JA	324	account_m(pci, w, t->bytes);
d5396421 JA	325	log_merge(pci, t, 'M');
d0ca268b JA	326	break;
d0ca268b JA	327	case __BLK_TA_FRONTMERGE:
d5396421 JA	328	account_m(pci, w, t->bytes);
d5396421 JA	329	log_merge(pci, t, 'F');
d0ca268b JA	330	break;
d0ca268b JA	331	case __BLK_TA_GETRQ:
d5396421	332	log_generic(pci, t, 'G');
d0ca268b JA	333	break;
d0ca268b JA	334	case __BLK_TA_SLEEPRQ:
d5396421	335	log_generic(pci, t, 'S');
d0ca268b JA	336	break;
d0ca268b JA	337	case __BLK_TA_REQUEUE:
d5396421 JA	338	account_c(pci, w, -t->bytes);
d5396421 JA	339	log_queue(pci, t, 'R');
d0ca268b JA	340	break;
d0ca268b JA	341	case __BLK_TA_ISSUE:
d5396421 JA	342	account_i(pci, w, t->bytes);
d5396421 JA	343	log_issue(pci, t, 'D');
d0ca268b JA	344	break;
d0ca268b JA	345	case __BLK_TA_COMPLETE:
d5396421 JA	346	account_c(pci, w, t->bytes);
d5396421 JA	347	log_complete(pci, t, 'C');
d0ca268b JA	348	break;
	349	default:
	350	fprintf(stderr, "Bad fs action %x\n", t->action);
1f79c4a0	351	break;
d0ca268b	352	}
d0ca268b JA	353	}
d0ca268b JA	354
d5396421	355	static int dump_trace(struct blk_io_trace t, struct per_cpu_info pci)
d0ca268b	356	{
87b72777 JA	357	int ret = 0;
87b72777 JA	358
33b56019 JA	359	if (output_name && !pci->ofp) {
	360	snprintf(pci->ofname, sizeof(pci->ofname) - 1,
	361	"%s_log.%d", output_name, pci->cpu);
	362
	363	pci->ofp = fopen(pci->ofname, "w");
	364	if (pci->ofp == NULL) {
	365	perror(pci->ofname);
	366	return 1;
	367	}
	368	}
	369
d0ca268b	370	if (t->action & BLK_TC_ACT(BLK_TC_PC))
d5396421	371	ret = dump_trace_pc(t, pci);
d0ca268b	372	else
d5396421	373	dump_trace_fs(t, pci);
87b72777 JA	374
	375	events++;
	376	return ret;
d0ca268b JA	377	}
d0ca268b JA	378
d5396421	379	static void dump_pci_stats(struct per_cpu_info *pci)
5c017e4b JA	380	{
5c017e4b JA	381	printf("\tReads:\n");
d5396421 JA	382	printf("\t\tQueued: %'8lu, %'8LuKiB\n", pci->qreads, pci->qread_kb);
	383	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->ireads, pci->iread_kb);
	384	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->creads, pci->cread_kb);
	385	printf("\t\tMerges: %'8lu\n", pci->mreads);
5c017e4b JA	386
5c017e4b JA	387	printf("\tWrites:\n");
d5396421 JA	388	printf("\t\tQueued: %'8lu, %'8LuKiB\n", pci->qwrites,pci->qwrite_kb);
	389	printf("\t\tDispatched %'8lu, %'8LuKiB\n", pci->iwrites,pci->iwrite_kb);
	390	printf("\t\tCompleted: %'8lu, %'8LuKiB\n", pci->cwrites,pci->cwrite_kb);
	391	printf("\t\tMerges: %'8lu\n", pci->mwrites);
5c017e4b JA	392	}
5c017e4b JA	393
d5396421	394	static void show_stats(void)
d0ca268b	395	{
d5396421	396	struct per_cpu_info foo, *pci;
412819ce	397	int i, pci_events = 0;
5c017e4b JA	398
5c017e4b JA	399	memset(&foo, 0, sizeof(foo));
d0ca268b	400
a718bd37	401	for (i = 0; i < max_cpus; i++) {
d5396421	402	pci = &per_cpu_info[i];
5c017e4b	403
d5396421	404	if (!pci->nelems)
afd2d7ad	405	continue;
afd2d7ad	406
d5396421 JA	407	foo.qreads += pci->qreads;
	408	foo.qwrites += pci->qwrites;
	409	foo.creads += pci->creads;
	410	foo.cwrites += pci->cwrites;
	411	foo.mreads += pci->mreads;
	412	foo.mwrites += pci->mwrites;
	413	foo.qread_kb += pci->qread_kb;
	414	foo.qwrite_kb += pci->qwrite_kb;
	415	foo.cread_kb += pci->cread_kb;
	416	foo.cwrite_kb += pci->cwrite_kb;
5c017e4b JA	417
5c017e4b JA	418	printf("CPU%d:\n", i);
d5396421	419	dump_pci_stats(pci);
412819ce	420	pci_events++;
5c017e4b JA	421	}
5c017e4b JA	422
412819ce	423	if (pci_events > 1) {
5c017e4b	424	printf("Total:\n");
d5396421	425	dump_pci_stats(&foo);
5c017e4b	426	}
d0ca268b JA	427
d0ca268b JA	428	printf("Events: %'Lu\n", events);
d0ca268b JA	429	}
d0ca268b JA	430
3aabcd89	431	static inline int trace_rb_insert(struct trace *t)
8fc0abbc JA	432	{
	433	struct rb_node **p = &rb_root.rb_node;
	434	struct rb_node *parent = NULL;
	435	struct trace *__t;
	436
	437	while (*p) {
	438	parent = *p;
	439	__t = rb_entry(parent, struct trace, rb_node);
	440
	441	if (t->bit->sequence < __t->bit->sequence)
	442	p = &(*p)->rb_left;
	443	else if (t->bit->sequence > __t->bit->sequence)
	444	p = &(*p)->rb_right;
	445	else {
87b72777	446	fprintf(stderr, "sequence alias!\n");
8fc0abbc JA	447	return 1;
	448	}
	449	}
	450
	451	rb_link_node(&t->rb_node, parent, p);
	452	rb_insert_color(&t->rb_node, &rb_root);
	453	return 0;
	454	}
	455
412819ce	456	static int sort_entries(void *traces, unsigned long offset, int nr)
8fc0abbc	457	{
412819ce	458	struct per_cpu_info *pci;
8fc0abbc JA	459	struct blk_io_trace *bit;
	460	struct trace *t;
	461	void *start = traces;
	462	int nelems = 0;
	463
6fe4709e	464	while (traces - start <= offset - sizeof(*bit)) {
412819ce JA	465	if (!nr)
	466	break;
	467
8fc0abbc	468	bit = traces;
6fe4709e	469
8fc0abbc JA	470	t = malloc(sizeof(*t));
	471	t->bit = bit;
	472	memset(&t->rb_node, 0, sizeof(t->rb_node));
	473
6fe4709e JA	474	trace_to_cpu(bit);
6fe4709e JA	475
66fa7233 JA	476	if (verify_trace(bit))
	477	break;
	478
a718bd37	479	pci = get_cpu_info(bit->cpu);
412819ce JA	480	pci->nelems++;
412819ce JA	481
8fc0abbc JA	482	if (trace_rb_insert(t))
	483	return -1;
	484
	485	traces += sizeof(*bit) + bit->pdu_len;
	486	nelems++;
412819ce	487	nr--;
6fe4709e	488	}
8fc0abbc JA	489
	490	return nelems;
	491	}
	492
412819ce JA	493	static void free_entries_rb(void)
	494	{
	495	struct rb_node *n;
	496
	497	while ((n = rb_first(&rb_root)) != NULL) {
	498	struct trace *t = rb_entry(n, struct trace, rb_node);
	499
	500	rb_erase(&t->rb_node, &rb_root);
	501	free(t);
	502	}
	503	}
	504
d5396421	505	static void show_entries_rb(void)
8fc0abbc	506	{
8fc0abbc	507	struct blk_io_trace *bit;
3aabcd89	508	struct rb_node *n;
8fc0abbc JA	509	struct trace *t;
	510	int cpu;
	511
3aabcd89 JA	512	n = rb_first(&rb_root);
	513	if (!n)
	514	return;
8fc0abbc	515
3aabcd89	516	do {
8fc0abbc JA	517	t = rb_entry(n, struct trace, rb_node);
	518	bit = t->bit;
	519
d5396421	520	cpu = bit->cpu;
87b72777	521	if (cpu > max_cpus) {
8fc0abbc	522	fprintf(stderr, "CPU number too large (%d)\n", cpu);
87b72777	523	break;
8fc0abbc JA	524	}
8fc0abbc JA	525
cfab07eb AB	526	if (genesis_time == 0)
	527	genesis_time = bit->time;
	528	bit->time -= genesis_time;
8fc0abbc	529
cfab07eb	530	check_time(bit);
8fc0abbc	531
d5396421	532	if (dump_trace(bit, &per_cpu_info[cpu]))
87b72777 JA	533	break;
87b72777 JA	534
8fc0abbc JA	535	} while ((n = rb_next(n)) != NULL);
	536	}
	537
1f79c4a0 JA	538	static int read_data(int fd, void *buffer, int bytes, int block)
	539	{
	540	int ret, bytes_left, fl;
	541	void *p;
	542
	543	fl = fcntl(fd, F_GETFL);
	544
	545	if (!block)
	546	fcntl(fd, F_SETFL, fl \| O_NONBLOCK);
	547	else
	548	fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);
	549
	550	bytes_left = bytes;
	551	p = buffer;
	552	while (bytes_left > 0) {
	553	ret = read(fd, p, bytes_left);
	554	if (!ret)
	555	return 1;
	556	else if (ret < 0) {
	557	if (errno != EAGAIN)
	558	perror("read");
	559	return -1;
	560	} else {
	561	p += ret;
	562	bytes_left -= ret;
	563	}
	564	}
	565
	566	return 0;
	567	}
	568
d5396421	569	static int do_file(void)
d0ca268b	570	{
a718bd37	571	int i, nfiles;
d0ca268b	572
a718bd37 NS	573	for (i = 0, nfiles = 0;; i++, nfiles++) {
a718bd37 NS	574	struct per_cpu_info *pci;
87b72777 JA	575	struct stat st;
	576	void *tb;
	577
a718bd37	578	pci = get_cpu_info(i);
d5396421 JA	579	pci->cpu = i;
d5396421 JA	580	pci->ofp = NULL;
d0ca268b	581
d5396421 JA	582	snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
d5396421 JA	583	if (stat(pci->fname, &st) < 0)
d0ca268b	584	break;
afd2d7ad	585	if (!st.st_size)
afd2d7ad	586	continue;
d0ca268b	587
d5396421	588	printf("Processing %s\n", pci->fname);
8fc0abbc	589
87b72777	590	tb = malloc(st.st_size);
8fc0abbc	591
d5396421 JA	592	pci->fd = open(pci->fname, O_RDONLY);
	593	if (pci->fd < 0) {
	594	perror(pci->fname);
3aabcd89	595	break;
d0ca268b	596	}
afd2d7ad	597
1f79c4a0	598	if (read_data(pci->fd, tb, st.st_size, 1))
3aabcd89	599	break;
d0ca268b	600
a718bd37	601	if (sort_entries(tb, st.st_size, ~0U) == -1)
3aabcd89	602	break;
d0ca268b	603
d5396421	604	close(pci->fd);
d5396421 JA	605	printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);
	606
	607	}
	608
	609	if (!nfiles) {
	610	fprintf(stderr, "No files found\n");
	611	return 1;
	612	}
	613
	614	show_entries_rb();
d5396421 JA	615	return 0;
	616	}
	617
412819ce	618	static void resize_buffer(void *buffer, long old_size)
d5396421	619	{
412819ce	620	long cur_size = *old_size;
d5396421 JA	621	void *ptr;
d5396421 JA	622
412819ce JA	623	old_size = 2;
	624	ptr = malloc(*old_size);
	625	memcpy(ptr, *buffer, cur_size);
	626	free(*buffer);
	627	*buffer = ptr;
	628	}
d5396421	629
412819ce JA	630	static int read_sort_events(int fd, void **buffer)
	631	{
	632	long offset, max_offset;
	633	int events;
d5396421	634
412819ce JA	635	max_offset = 128 * sizeof(struct blk_io_trace);
	636	*buffer = malloc(max_offset);
	637	events = 0;
	638	offset = 0;
d5396421	639
412819ce JA	640	do {
	641	struct blk_io_trace *t;
	642	int pdu_len;
d5396421	643
412819ce JA	644	if (max_offset - offset < sizeof(*t))
412819ce JA	645	resize_buffer(buffer, &max_offset);
d5396421	646
412819ce JA	647	if (read_data(fd, buffer + offset, sizeof(t), !events)) {
412819ce JA	648	if (events)
d5396421	649	break;
412819ce JA	650
	651	usleep(1000);
	652	continue;
d5396421 JA	653	}
d5396421 JA	654
412819ce JA	655	t = *buffer + offset;
412819ce JA	656	offset += sizeof(*t);
d5396421	657
412819ce	658	pdu_len = be16_to_cpu(t->pdu_len);
d5396421	659
412819ce JA	660	if (max_offset - offset < pdu_len)
412819ce JA	661	resize_buffer(buffer, &max_offset);
d5396421	662
412819ce JA	663	if (read_data(fd, *buffer + offset, pdu_len, 1))
412819ce JA	664	break;
d5396421	665
412819ce JA	666	offset += pdu_len;
	667	events++;
	668	} while (!is_done());
d5396421	669
412819ce JA	670	return events;
412819ce JA	671	}
d5396421	672
412819ce JA	673	static int do_stdin(void)
	674	{
	675	int fd;
	676	void *ptr;
d5396421	677
1f79c4a0	678	fd = dup(STDIN_FILENO);
412819ce JA	679	do {
412819ce JA	680	int events;
d5396421	681
412819ce JA	682	events = read_sort_events(fd, &ptr);
	683	if (!events)
	684	break;
	685
	686	sort_entries(ptr, ~0UL, events);
	687	show_entries_rb();
	688	free_entries_rb();
d5396421 JA	689	} while (1);
	690
	691	close(fd);
	692	free(ptr);
d5396421 JA	693	return 0;
d5396421 JA	694	}
d0ca268b	695
1f79c4a0	696	static void flush_output(void)
412819ce JA	697	{
	698	int i;
	699
a718bd37	700	for (i = 0; i < max_cpus; i++) {
412819ce JA	701	struct per_cpu_info *pci = &per_cpu_info[i];
	702
	703	if (pci->ofp) {
	704	fflush(pci->ofp);
	705	fclose(pci->ofp);
	706	pci->ofp = NULL;
	707	}
	708	}
	709	}
	710
1f79c4a0	711	static void handle_sigint(int sig)
412819ce JA	712	{
	713	done = 1;
	714	flush_output();
	715	}
	716
1f79c4a0 JA	717	static void usage(char *prog)
	718	{
	719	fprintf(stderr, "Usage: %s -i <name> [-o <output>]\n", prog);
	720	}
	721
d5396421 JA	722	int main(int argc, char *argv[])
d5396421 JA	723	{
412819ce	724	int c, ret;
d5396421 JA	725
	726	while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
	727	switch (c) {
	728	case 'i':
	729	dev = strdup(optarg);
	730	break;
	731	case 'o':
	732	output_name = strdup(optarg);
	733	break;
	734	default:
1f79c4a0	735	usage(argv[0]);
d5396421 JA	736	return 1;
d5396421 JA	737	}
d0ca268b JA	738	}
d0ca268b JA	739
d5396421	740	if (!dev) {
1f79c4a0	741	usage(argv[0]);
d5396421 JA	742	return 1;
	743	}
	744
412819ce JA	745	memset(&rb_root, 0, sizeof(rb_root));
	746
	747	signal(SIGINT, handle_sigint);
	748	signal(SIGHUP, handle_sigint);
	749	signal(SIGTERM, handle_sigint);
d5396421 JA	750
	751	if (!strcmp(dev, "-"))
	752	ret = do_stdin();
	753	else
	754	ret = do_file();
	755
412819ce JA	756	show_stats();
412819ce JA	757	flush_output();
d5396421	758	return ret;
d0ca268b	759	}