[fio.git] / verify.c

/*
 * IO verification helpers
 */
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>

#include "fio.h"

#include "crc/md5.h"
#include "crc/crc64.h"
#include "crc/crc32.h"
#include "crc/crc16.h"
#include "crc/crc7.h"
#include "crc/sha256.h"
#include "crc/sha512.h"

static void fill_random_bytes(struct thread_data *td, void *p, unsigned int len)
{
	unsigned int todo;
	int r;

	while (len) {
		r = os_random_long(&td->verify_state);

		/*
		 * lrand48_r seems to be broken and only fill the bottom
		 * 32-bits, even on 64-bit archs with 64-bit longs
		 */
		todo = sizeof(r);
		if (todo > len)
			todo = len;

		memcpy(p, &r, todo);

		len -= todo;
		p += todo;
	}
}

static void fill_pattern(struct thread_data *td, void *p, unsigned int len)
{
	switch (td->o.verify_pattern_bytes) {
	case 0:
		dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
		fill_random_bytes(td, p, len);
		break;
	case 1:
		dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
		memset(p, td->o.verify_pattern, len);
		break;
	case 2:
	case 3:
	case 4: {
		unsigned int pattern = td->o.verify_pattern;
		unsigned int i = 0;
		unsigned char c1, c2, c3, c4;
		unsigned char *b = p;

		dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
					td->o.verify_pattern_bytes, len);

		c1 = pattern & 0xff;
		pattern >>= 8;
		c2 = pattern & 0xff;
		pattern >>= 8;
		c3 = pattern & 0xff;
		pattern >>= 8;
		c4 = pattern & 0xff;

		while (i < len) {
			b[i++] = c1;
			if (i == len)
				break;
			b[i++] = c2;
			if (td->o.verify_pattern_bytes == 2 || i == len)
				continue;
			b[i++] = c3;
			if (td->o.verify_pattern_bytes == 3 || i == len)
				continue;
			b[i++] = c4;
		}
		break;
		}
	}
}

static void memswp(void *buf1, void *buf2, unsigned int len)
{
	char swap[200];

	assert(len <= sizeof(swap));

	memcpy(&swap, buf1, len);
	memcpy(buf1, buf2, len);
	memcpy(buf2, &swap, len);
}

static void hexdump(void *buffer, int len)
{
	unsigned char *p = buffer;
	int i;

	for (i = 0; i < len; i++)
		log_info("%02x", p[i]);
	log_info("\n");
}

/*
 * Prepare for seperation of verify_header and checksum header
 */
static inline unsigned int __hdr_size(int verify_type)
{
	unsigned int len;

	switch (verify_type) {
	case VERIFY_NONE:
	case VERIFY_NULL:
		len = 0;
		break;
	case VERIFY_MD5:
		len = sizeof(struct vhdr_md5);
		break;
	case VERIFY_CRC64:
		len = sizeof(struct vhdr_crc64);
		break;
	case VERIFY_CRC32:
		len = sizeof(struct vhdr_crc32);
		break;
	case VERIFY_CRC16:
		len = sizeof(struct vhdr_crc16);
		break;
	case VERIFY_CRC7:
		len = sizeof(struct vhdr_crc7);
		break;
	case VERIFY_SHA256:
		len = sizeof(struct vhdr_sha256);
		break;
	case VERIFY_SHA512:
		len = sizeof(struct vhdr_sha512);
		break;
	case VERIFY_META:
		len = sizeof(struct vhdr_meta);
		break;
	default:
		log_err("fio: unknown verify header!\n");
		assert(0);
	}

	return len + sizeof(struct verify_header);
}

static inline unsigned int hdr_size(struct verify_header *hdr)
{
	return __hdr_size(hdr->verify_type);
}

static void *hdr_priv(struct verify_header *hdr)
{
	void *priv = hdr;

	return priv + sizeof(struct verify_header);
}

/*
 * Return data area 'header_num'
 */
static inline void *io_u_verify_off(struct verify_header *hdr,
				    struct io_u *io_u, unsigned char header_num)
{
	return io_u->buf + header_num * hdr->len + hdr_size(hdr);
}

static int verify_io_u_meta(struct verify_header *hdr, struct thread_data *td,
			    struct io_u *io_u, unsigned int header_num)
{
	struct vhdr_meta *vh = hdr_priv(hdr);

	dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);

	if (vh->offset != io_u->offset + header_num * td->o.verify_interval) {
		log_err("meta: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		return EIO;
	}

	return 0;
}

static int verify_io_u_sha512(struct verify_header *hdr, struct io_u *io_u,
			      unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_sha512 *vh = hdr_priv(hdr);
	uint8_t sha512[128];
	struct sha512_ctx sha512_ctx = {
		.buf = sha512,
	};

	dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", io_u, hdr->len);

	sha512_init(&sha512_ctx);
	sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) {
		log_err("sha512: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->sha512, sizeof(vh->sha512));
		hexdump(sha512_ctx.buf, sizeof(sha512));
		return EIO;
	}

	return 0;
}

static int verify_io_u_sha256(struct verify_header *hdr, struct io_u *io_u,
			      unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_sha256 *vh = hdr_priv(hdr);
	uint8_t sha256[128];
	struct sha256_ctx sha256_ctx = {
		.buf = sha256,
	};

	dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", io_u, hdr->len);

	sha256_init(&sha256_ctx);
	sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) {
		log_err("sha256: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->sha256, sizeof(vh->sha256));
		hexdump(sha256_ctx.buf, sizeof(sha256));
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u,
			    unsigned char header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc7 *vh = hdr_priv(hdr);
	unsigned char c;

	dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc7(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc7) {
		log_err("crc7: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc7: wanted %x, got %x\n", vh->crc7, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc16 *vh = hdr_priv(hdr);
	unsigned short c;

	dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc16(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc16) {
		log_err("crc16: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc16: wanted %x, got %x\n", vh->crc16, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc64(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc64 *vh = hdr_priv(hdr);
	unsigned long long c;

	dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc64(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc64) {
		log_err("crc64: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len,
				hdr->len);
		log_err("crc64: wanted %llx, got %llx\n",
					(unsigned long long) vh->crc64, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u,
			     unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_crc32 *vh = hdr_priv(hdr);
	uint32_t c;

	dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", io_u, hdr->len);

	c = crc32(p, hdr->len - hdr_size(hdr));

	if (c != vh->crc32) {
		log_err("crc32: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		log_err("crc32: wanted %x, got %x\n", vh->crc32, c);
		return EIO;
	}

	return 0;
}

static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u,
			   unsigned int header_num)
{
	void *p = io_u_verify_off(hdr, io_u, header_num);
	struct vhdr_md5 *vh = hdr_priv(hdr);
	uint32_t hash[MD5_HASH_WORDS];
	struct md5_ctx md5_ctx = {
		.hash = hash,
	};

	dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", io_u, hdr->len);

	md5_init(&md5_ctx);
	md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));

	if (memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) {
		log_err("md5: verify failed at %llu/%u\n",
				io_u->offset + header_num * hdr->len, hdr->len);
		hexdump(vh->md5_digest, sizeof(vh->md5_digest));
		hexdump(md5_ctx.hash, sizeof(hash));
		return EIO;
	}

	return 0;
}

static unsigned int hweight8(unsigned int w)
{
	unsigned int res = w - ((w >> 1) & 0x55);

	res = (res & 0x33) + ((res >> 2) & 0x33);
	return (res + (res >> 4)) & 0x0F;
}

int verify_io_u_pattern(unsigned long pattern, unsigned long pattern_size,
			char *buf, unsigned int len, unsigned int mod)
{
	unsigned int i;
	char split_pattern[4];

	for (i = 0; i < 4; i++) {
		split_pattern[i] = pattern & 0xff;
		pattern >>= 8;
	}

	for (i = 0; i < len; i++) {
		if (buf[i] != split_pattern[mod]) {
			unsigned int bits;

			bits = hweight8(buf[i] ^ split_pattern[mod]);
			log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
				buf[i], split_pattern[mod], bits);
			log_err("fio: bad pattern block offset %u\n", i);
			return EIO;
		}
		mod++;
		if (mod == pattern_size)
			mod = 0;
	}

	return 0;
}

int verify_io_u(struct thread_data *td, struct io_u *io_u)
{
	struct verify_header *hdr;
	unsigned int hdr_size, hdr_inc, hdr_num = 0;
	void *p;
	int ret;

	if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
		return 0;

	hdr_inc = io_u->buflen;
	if (td->o.verify_interval)
		hdr_inc = td->o.verify_interval;

	ret = 0;
	for (p = io_u->buf; p < io_u->buf + io_u->buflen;
	     p += hdr_inc, hdr_num++) {
		if (ret && td->o.verify_fatal) {
			td->terminate = 1;
			break;
		}
		hdr_size = __hdr_size(td->o.verify);
		if (td->o.verify_offset)
			memswp(p, p + td->o.verify_offset, hdr_size);
		hdr = p;

		if (hdr->fio_magic != FIO_HDR_MAGIC) {
			log_err("Bad verify header %x\n", hdr->fio_magic);
			return EIO;
		}

		if (td->o.verify_pattern_bytes) {
			dprint(FD_VERIFY, "pattern verify io_u %p, len %u\n",
								io_u, hdr->len);
			ret = verify_io_u_pattern(td->o.verify_pattern,
						  td->o.verify_pattern_bytes,
						  p + hdr_size,
						  hdr_inc - hdr_size,
						  hdr_size % 4);
			if (ret)
				log_err("fio: verify failed at %llu/%u\n",
					io_u->offset + hdr_num * hdr->len,
					hdr->len);
			continue;
		}

		switch (hdr->verify_type) {
		case VERIFY_MD5:
			ret = verify_io_u_md5(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC64:
			ret = verify_io_u_crc64(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC32:
			ret = verify_io_u_crc32(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC16:
			ret = verify_io_u_crc16(hdr, io_u, hdr_num);
			break;
		case VERIFY_CRC7:
			ret = verify_io_u_crc7(hdr, io_u, hdr_num);
			break;
		case VERIFY_SHA256:
			ret = verify_io_u_sha256(hdr, io_u, hdr_num);
			break;
		case VERIFY_SHA512:
			ret = verify_io_u_sha512(hdr, io_u, hdr_num);
			break;
		case VERIFY_META:
			ret = verify_io_u_meta(hdr, td, io_u, hdr_num);
			break;
		default:
			log_err("Bad verify type %u\n", hdr->verify_type);
			ret = EINVAL;
		}
	}

	return ret;
}

static void fill_meta(struct verify_header *hdr, struct thread_data *td,
		      struct io_u *io_u, unsigned int header_num)
{
	struct vhdr_meta *vh = hdr_priv(hdr);

	vh->thread = td->thread_number;

	vh->time_sec = io_u->start_time.tv_sec;
	vh->time_usec = io_u->start_time.tv_usec;

	vh->numberio = td->io_issues[DDIR_WRITE];

	vh->offset = io_u->offset + header_num * td->o.verify_interval;
}

static void fill_sha512(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_sha512 *vh = hdr_priv(hdr);
	struct sha512_ctx sha512_ctx = {
		.buf = vh->sha512,
	};

	sha512_init(&sha512_ctx);
	sha512_update(&sha512_ctx, p, len);
}

static void fill_sha256(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_sha256 *vh = hdr_priv(hdr);
	struct sha256_ctx sha256_ctx = {
		.buf = vh->sha256,
	};

	sha256_init(&sha256_ctx);
	sha256_update(&sha256_ctx, p, len);
}

static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc7 *vh = hdr_priv(hdr);

	vh->crc7 = crc7(p, len);
}

static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc16 *vh = hdr_priv(hdr);

	vh->crc16 = crc16(p, len);
}

static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc32 *vh = hdr_priv(hdr);

	vh->crc32 = crc32(p, len);
}

static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_crc64 *vh = hdr_priv(hdr);

	vh->crc64 = crc64(p, len);
}

static void fill_md5(struct verify_header *hdr, void *p, unsigned int len)
{
	struct vhdr_md5 *vh = hdr_priv(hdr);
	struct md5_ctx md5_ctx = {
		.hash = (uint32_t *) vh->md5_digest,
	};

	md5_init(&md5_ctx);
	md5_update(&md5_ctx, p, len);
}

/*
 * fill body of io_u->buf with random data and add a header with the
 * crc32 or md5 sum of that data.
 */
void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
{
	struct verify_header *hdr;
	void *p = io_u->buf, *data;
	unsigned int hdr_inc, data_len, header_num = 0;

	if (td->o.verify == VERIFY_NULL)
		return;

	fill_pattern(td, p, io_u->buflen);

	hdr_inc = io_u->buflen;
	if (td->o.verify_interval)
		hdr_inc = td->o.verify_interval;

	for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
		hdr = p;

		hdr->fio_magic = FIO_HDR_MAGIC;
		hdr->verify_type = td->o.verify;
		hdr->len = hdr_inc;
		data_len = hdr_inc - hdr_size(hdr);

		data = p + hdr_size(hdr);
		switch (td->o.verify) {
		case VERIFY_MD5:
			dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_md5(hdr, data, data_len);
			break;
		case VERIFY_CRC64:
			dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc64(hdr, data, data_len);
			break;
		case VERIFY_CRC32:
			dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc32(hdr, data, data_len);
			break;
		case VERIFY_CRC16:
			dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc16(hdr, data, data_len);
			break;
		case VERIFY_CRC7:
			dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_crc7(hdr, data, data_len);
			break;
		case VERIFY_SHA256:
			dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_sha256(hdr, data, data_len);
			break;
		case VERIFY_SHA512:
			dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
							io_u, hdr->len);
			fill_sha512(hdr, data, data_len);
			break;
		case VERIFY_META:
			dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
							io_u, hdr->len);
			fill_meta(hdr, td, io_u, header_num);
			break;
		default:
			log_err("fio: bad verify type: %d\n", td->o.verify);
			assert(0);
		}
		if (td->o.verify_offset)
			memswp(p, p + td->o.verify_offset, hdr_size(hdr));
		header_num++;
	}
}

int get_next_verify(struct thread_data *td, struct io_u *io_u)
{
	struct io_piece *ipo = NULL;

	/*
	 * this io_u is from a requeue, we already filled the offsets
	 */
	if (io_u->file)
		return 0;

	if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
		struct rb_node *n = rb_first(&td->io_hist_tree);

		ipo = rb_entry(n, struct io_piece, rb_node);
		rb_erase(n, &td->io_hist_tree);
	} else if (!list_empty(&td->io_hist_list)) {
		ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
		list_del(&ipo->list);
	}

	if (ipo) {
		io_u->offset = ipo->offset;
		io_u->buflen = ipo->len;
		io_u->file = ipo->file;

		if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
			int r = td_io_open_file(td, io_u->file);

			if (r) {
				dprint(FD_VERIFY, "failed file %s open\n",
						io_u->file->file_name);
				return 1;
			}
		}

		get_file(ipo->file);
		assert(io_u->file->flags & FIO_FILE_OPEN);
		io_u->ddir = DDIR_READ;
		io_u->xfer_buf = io_u->buf;
		io_u->xfer_buflen = io_u->buflen;
		free(ipo);
		dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
		return 0;
	}

	dprint(FD_VERIFY, "get_next_verify: empty\n");
	return 1;
}
Commit	Line	Data
e29d1b70 JA	1	/*
	2	* IO verification helpers
	3	*/
	4	#include <unistd.h>
	5	#include <fcntl.h>
	6	#include <string.h>
97af62ce	7	#include <assert.h>
e29d1b70 JA	8
e29d1b70 JA	9	#include "fio.h"
e29d1b70	10
eef6eea1 JA	11	#include "crc/md5.h"
	12	#include "crc/crc64.h"
	13	#include "crc/crc32.h"
	14	#include "crc/crc16.h"
	15	#include "crc/crc7.h"
	16	#include "crc/sha256.h"
	17	#include "crc/sha512.h"
cd14cc10	18
90059d65	19	static void fill_random_bytes(struct thread_data td, void p, unsigned int len)
e29d1b70 JA	20	{
e29d1b70 JA	21	unsigned int todo;
4c5946c6	22	int r;
e29d1b70 JA	23
e29d1b70 JA	24	while (len) {
4c5946c6	25	r = os_random_long(&td->verify_state);
e29d1b70 JA	26
	27	/*
	28	* lrand48_r seems to be broken and only fill the bottom
	29	* 32-bits, even on 64-bit archs with 64-bit longs
	30	*/
	31	todo = sizeof(r);
	32	if (todo > len)
	33	todo = len;
	34
	35	memcpy(p, &r, todo);
	36
	37	len -= todo;
	38	p += todo;
	39	}
	40	}
	41
90059d65 JA	42	static void fill_pattern(struct thread_data td, void p, unsigned int len)
	43	{
	44	switch (td->o.verify_pattern_bytes) {
	45	case 0:
bd6f78b2	46	dprint(FD_VERIFY, "fill random bytes len=%u\n", len);
90059d65 JA	47	fill_random_bytes(td, p, len);
	48	break;
	49	case 1:
bd6f78b2	50	dprint(FD_VERIFY, "fill verify pattern b=0 len=%u\n", len);
90059d65 JA	51	memset(p, td->o.verify_pattern, len);
	52	break;
	53	case 2:
	54	case 3:
	55	case 4: {
	56	unsigned int pattern = td->o.verify_pattern;
	57	unsigned int i = 0;
	58	unsigned char c1, c2, c3, c4;
	59	unsigned char *b = p;
	60
bd6f78b2 JA	61	dprint(FD_VERIFY, "fill verify pattern b=%d len=%u\n",
	62	td->o.verify_pattern_bytes, len);
	63
90059d65 JA	64	c1 = pattern & 0xff;
	65	pattern >>= 8;
	66	c2 = pattern & 0xff;
	67	pattern >>= 8;
	68	c3 = pattern & 0xff;
	69	pattern >>= 8;
	70	c4 = pattern & 0xff;
	71
	72	while (i < len) {
	73	b[i++] = c1;
	74	if (i == len)
	75	break;
	76	b[i++] = c2;
	77	if (td->o.verify_pattern_bytes == 2 \|\| i == len)
	78	continue;
	79	b[i++] = c3;
	80	if (td->o.verify_pattern_bytes == 3 \|\| i == len)
	81	continue;
	82	b[i++] = c4;
	83	}
	84	break;
	85	}
	86	}
	87	}
	88
4764aec9	89	static void memswp(void buf1, void buf2, unsigned int len)
546a9142	90	{
dee6de74 SL	91	char swap[200];
	92
	93	assert(len <= sizeof(swap));
90059d65	94
546a9142 SL	95	memcpy(&swap, buf1, len);
	96	memcpy(buf1, buf2, len);
	97	memcpy(buf2, &swap, len);
	98	}
	99
e29d1b70 JA	100	static void hexdump(void *buffer, int len)
	101	{
	102	unsigned char *p = buffer;
	103	int i;
	104
	105	for (i = 0; i < len; i++)
6d86144d JA	106	log_info("%02x", p[i]);
6d86144d JA	107	log_info("\n");
e29d1b70 JA	108	}
e29d1b70 JA	109
87677832 JA	110	/*
	111	* Prepare for seperation of verify_header and checksum header
	112	*/
546dfd9f	113	static inline unsigned int __hdr_size(int verify_type)
87677832	114	{
546dfd9f	115	unsigned int len;
87677832	116
546dfd9f JA	117	switch (verify_type) {
	118	case VERIFY_NONE:
	119	case VERIFY_NULL:
	120	len = 0;
	121	break;
	122	case VERIFY_MD5:
	123	len = sizeof(struct vhdr_md5);
	124	break;
	125	case VERIFY_CRC64:
	126	len = sizeof(struct vhdr_crc64);
	127	break;
	128	case VERIFY_CRC32:
	129	len = sizeof(struct vhdr_crc32);
	130	break;
	131	case VERIFY_CRC16:
	132	len = sizeof(struct vhdr_crc16);
	133	break;
	134	case VERIFY_CRC7:
	135	len = sizeof(struct vhdr_crc7);
	136	break;
	137	case VERIFY_SHA256:
	138	len = sizeof(struct vhdr_sha256);
	139	break;
	140	case VERIFY_SHA512:
	141	len = sizeof(struct vhdr_sha512);
	142	break;
7437ee87 SL	143	case VERIFY_META:
	144	len = sizeof(struct vhdr_meta);
	145	break;
546dfd9f JA	146	default:
	147	log_err("fio: unknown verify header!\n");
	148	assert(0);
	149	}
	150
	151	return len + sizeof(struct verify_header);
87677832 JA	152	}
	153
	154	static inline unsigned int hdr_size(struct verify_header *hdr)
	155	{
546dfd9f JA	156	return __hdr_size(hdr->verify_type);
	157	}
	158
	159	static void hdr_priv(struct verify_header hdr)
	160	{
	161	void *priv = hdr;
	162
	163	return priv + sizeof(struct verify_header);
87677832 JA	164	}
87677832 JA	165
d9f2caf3 JA	166	/*
	167	* Return data area 'header_num'
	168	*/
	169	static inline void io_u_verify_off(struct verify_header hdr,
5ec10eaa	170	struct io_u *io_u, unsigned char header_num)
d9f2caf3	171	{
87677832	172	return io_u->buf + header_num * hdr->len + hdr_size(hdr);
d9f2caf3 JA	173	}
d9f2caf3 JA	174
7437ee87	175	static int verify_io_u_meta(struct verify_header hdr, struct thread_data td,
5ec10eaa	176	struct io_u *io_u, unsigned int header_num)
7437ee87 SL	177	{
	178	struct vhdr_meta *vh = hdr_priv(hdr);
	179
bd6f78b2 JA	180	dprint(FD_VERIFY, "meta verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	181
7437ee87 SL	182	if (vh->offset != io_u->offset + header_num * td->o.verify_interval) {
7437ee87 SL	183	log_err("meta: verify failed at %llu/%u\n",
5ec10eaa	184	io_u->offset + header_num * hdr->len, hdr->len);
d16d4e09	185	return EIO;
7437ee87 SL	186	}
	187
	188	return 0;
	189	}
	190
cd14cc10 JA	191	static int verify_io_u_sha512(struct verify_header hdr, struct io_u io_u,
	192	unsigned int header_num)
	193	{
	194	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	195	struct vhdr_sha512 *vh = hdr_priv(hdr);
cd14cc10 JA	196	uint8_t sha512[128];
	197	struct sha512_ctx sha512_ctx = {
	198	.buf = sha512,
	199	};
	200
bd6f78b2 JA	201	dprint(FD_VERIFY, "sha512 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	202
cd14cc10	203	sha512_init(&sha512_ctx);
87677832	204	sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
cd14cc10	205
546dfd9f	206	if (memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) {
cd14cc10	207	log_err("sha512: verify failed at %llu/%u\n",
5ec10eaa	208	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	209	hexdump(vh->sha512, sizeof(vh->sha512));
cd14cc10	210	hexdump(sha512_ctx.buf, sizeof(sha512));
d16d4e09	211	return EIO;
cd14cc10 JA	212	}
	213
	214	return 0;
	215	}
	216
	217	static int verify_io_u_sha256(struct verify_header hdr, struct io_u io_u,
	218	unsigned int header_num)
	219	{
	220	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	221	struct vhdr_sha256 *vh = hdr_priv(hdr);
cd14cc10 JA	222	uint8_t sha256[128];
	223	struct sha256_ctx sha256_ctx = {
	224	.buf = sha256,
	225	};
	226
bd6f78b2 JA	227	dprint(FD_VERIFY, "sha256 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	228
cd14cc10	229	sha256_init(&sha256_ctx);
87677832	230	sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
cd14cc10	231
546dfd9f	232	if (memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) {
cd14cc10	233	log_err("sha256: verify failed at %llu/%u\n",
5ec10eaa	234	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	235	hexdump(vh->sha256, sizeof(vh->sha256));
cd14cc10	236	hexdump(sha256_ctx.buf, sizeof(sha256));
d16d4e09	237	return EIO;
cd14cc10 JA	238	}
	239
	240	return 0;
	241	}
	242
3f9f4e26	243	static int verify_io_u_crc7(struct verify_header hdr, struct io_u io_u,
5ec10eaa	244	unsigned char header_num)
1e154bdb	245	{
d9f2caf3	246	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	247	struct vhdr_crc7 *vh = hdr_priv(hdr);
1e154bdb JA	248	unsigned char c;
1e154bdb JA	249
bd6f78b2 JA	250	dprint(FD_VERIFY, "crc7 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	251
87677832	252	c = crc7(p, hdr->len - hdr_size(hdr));
1e154bdb	253
546dfd9f	254	if (c != vh->crc7) {
3f9f4e26	255	log_err("crc7: verify failed at %llu/%u\n",
5ec10eaa	256	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	257	log_err("crc7: wanted %x, got %x\n", vh->crc7, c);
d16d4e09	258	return EIO;
1e154bdb JA	259	}
	260
	261	return 0;
	262	}
	263
3f9f4e26	264	static int verify_io_u_crc16(struct verify_header hdr, struct io_u io_u,
5ec10eaa	265	unsigned int header_num)
969f7ed3	266	{
d9f2caf3	267	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	268	struct vhdr_crc16 *vh = hdr_priv(hdr);
969f7ed3 JA	269	unsigned short c;
969f7ed3 JA	270
bd6f78b2 JA	271	dprint(FD_VERIFY, "crc16 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	272
87677832	273	c = crc16(p, hdr->len - hdr_size(hdr));
969f7ed3	274
546dfd9f	275	if (c != vh->crc16) {
3f9f4e26	276	log_err("crc16: verify failed at %llu/%u\n",
5ec10eaa	277	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	278	log_err("crc16: wanted %x, got %x\n", vh->crc16, c);
d16d4e09	279	return EIO;
969f7ed3 JA	280	}
	281
	282	return 0;
	283	}
	284
3f9f4e26	285	static int verify_io_u_crc64(struct verify_header hdr, struct io_u io_u,
5ec10eaa	286	unsigned int header_num)
d77a7af3	287	{
d9f2caf3	288	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	289	struct vhdr_crc64 *vh = hdr_priv(hdr);
d77a7af3 JA	290	unsigned long long c;
d77a7af3 JA	291
bd6f78b2 JA	292	dprint(FD_VERIFY, "crc64 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	293
87677832	294	c = crc64(p, hdr->len - hdr_size(hdr));
d77a7af3	295
546dfd9f	296	if (c != vh->crc64) {
3f9f4e26 SL	297	log_err("crc64: verify failed at %llu/%u\n",
	298	io_u->offset + header_num * hdr->len,
	299	hdr->len);
5ec10eaa JA	300	log_err("crc64: wanted %llx, got %llx\n",
5ec10eaa JA	301	(unsigned long long) vh->crc64, c);
d16d4e09	302	return EIO;
d77a7af3 JA	303	}
	304
	305	return 0;
	306	}
	307
3f9f4e26	308	static int verify_io_u_crc32(struct verify_header hdr, struct io_u io_u,
5ec10eaa	309	unsigned int header_num)
e29d1b70	310	{
d9f2caf3	311	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f JA	312	struct vhdr_crc32 *vh = hdr_priv(hdr);
546dfd9f JA	313	uint32_t c;
e29d1b70	314
bd6f78b2 JA	315	dprint(FD_VERIFY, "crc32 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	316
87677832	317	c = crc32(p, hdr->len - hdr_size(hdr));
e29d1b70	318
546dfd9f	319	if (c != vh->crc32) {
3f9f4e26	320	log_err("crc32: verify failed at %llu/%u\n",
5ec10eaa	321	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	322	log_err("crc32: wanted %x, got %x\n", vh->crc32, c);
d16d4e09	323	return EIO;
e29d1b70 JA	324	}
	325
	326	return 0;
	327	}
	328
3f9f4e26	329	static int verify_io_u_md5(struct verify_header hdr, struct io_u io_u,
5ec10eaa	330	unsigned int header_num)
e29d1b70	331	{
d9f2caf3	332	void *p = io_u_verify_off(hdr, io_u, header_num);
546dfd9f	333	struct vhdr_md5 *vh = hdr_priv(hdr);
8c432325 JA	334	uint32_t hash[MD5_HASH_WORDS];
	335	struct md5_ctx md5_ctx = {
	336	.hash = hash,
	337	};
e29d1b70	338
bd6f78b2 JA	339	dprint(FD_VERIFY, "md5 verify io_u %p, len %u\n", io_u, hdr->len);
bd6f78b2 JA	340
61f821f1	341	md5_init(&md5_ctx);
87677832	342	md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
e29d1b70	343
546dfd9f	344	if (memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) {
3f9f4e26	345	log_err("md5: verify failed at %llu/%u\n",
5ec10eaa	346	io_u->offset + header_num * hdr->len, hdr->len);
546dfd9f	347	hexdump(vh->md5_digest, sizeof(vh->md5_digest));
8c432325	348	hexdump(md5_ctx.hash, sizeof(hash));
d16d4e09	349	return EIO;
e29d1b70 JA	350	}
	351
	352	return 0;
	353	}
	354
3f199b01 JA	355	static unsigned int hweight8(unsigned int w)
	356	{
	357	unsigned int res = w - ((w >> 1) & 0x55);
	358
	359	res = (res & 0x33) + ((res >> 2) & 0x33);
	360	return (res + (res >> 4)) & 0x0F;
	361	}
	362
a944e335	363	int verify_io_u_pattern(unsigned long pattern, unsigned long pattern_size,
5ec10eaa	364	char *buf, unsigned int len, unsigned int mod)
a944e335 SL	365	{
	366	unsigned int i;
	367	char split_pattern[4];
	368
	369	for (i = 0; i < 4; i++) {
	370	split_pattern[i] = pattern & 0xff;
	371	pattern >>= 8;
	372	}
	373
	374	for (i = 0; i < len; i++) {
3f199b01 JA	375	if (buf[i] != split_pattern[mod]) {
	376	unsigned int bits;
	377
	378	bits = hweight8(buf[i] ^ split_pattern[mod]);
	379	log_err("fio: got pattern %x, wanted %x. Bad bits %d\n",
	380	buf[i], split_pattern[mod], bits);
	381	log_err("fio: bad pattern block offset %u\n", i);
d16d4e09	382	return EIO;
3f199b01	383	}
a944e335 SL	384	mod++;
	385	if (mod == pattern_size)
	386	mod = 0;
	387	}
	388
	389	return 0;
	390	}
	391
36690c9b	392	int verify_io_u(struct thread_data td, struct io_u io_u)
e29d1b70	393	{
3f9f4e26	394	struct verify_header *hdr;
a944e335	395	unsigned int hdr_size, hdr_inc, hdr_num = 0;
95646108	396	void *p;
e29d1b70 JA	397	int ret;
e29d1b70 JA	398
1dcc0498	399	if (td->o.verify == VERIFY_NULL \|\| io_u->ddir != DDIR_READ)
36690c9b JA	400	return 0;
36690c9b JA	401
3f9f4e26	402	hdr_inc = io_u->buflen;
a59e170d JA	403	if (td->o.verify_interval)
a59e170d JA	404	hdr_inc = td->o.verify_interval;
e29d1b70	405
a12a3b4d	406	ret = 0;
5ec10eaa JA	407	for (p = io_u->buf; p < io_u->buf + io_u->buflen;
5ec10eaa JA	408	p += hdr_inc, hdr_num++) {
a12a3b4d JA	409	if (ret && td->o.verify_fatal) {
	410	td->terminate = 1;
	411	break;
	412	}
a944e335	413	hdr_size = __hdr_size(td->o.verify);
a59e170d	414	if (td->o.verify_offset)
a944e335	415	memswp(p, p + td->o.verify_offset, hdr_size);
95646108	416	hdr = p;
e29d1b70	417
3f199b01 JA	418	if (hdr->fio_magic != FIO_HDR_MAGIC) {
	419	log_err("Bad verify header %x\n", hdr->fio_magic);
	420	return EIO;
	421	}
	422
e28218f3	423	if (td->o.verify_pattern_bytes) {
bd6f78b2 JA	424	dprint(FD_VERIFY, "pattern verify io_u %p, len %u\n",
bd6f78b2 JA	425	io_u, hdr->len);
e28218f3	426	ret = verify_io_u_pattern(td->o.verify_pattern,
5ec10eaa JA	427	td->o.verify_pattern_bytes,
	428	p + hdr_size,
	429	hdr_inc - hdr_size,
	430	hdr_size % 4);
e28218f3 SL	431	if (ret)
	432	log_err("fio: verify failed at %llu/%u\n",
	433	io_u->offset + hdr_num * hdr->len,
	434	hdr->len);
	435	continue;
	436	}
	437
3f9f4e26 SL	438	switch (hdr->verify_type) {
	439	case VERIFY_MD5:
	440	ret = verify_io_u_md5(hdr, io_u, hdr_num);
	441	break;
	442	case VERIFY_CRC64:
	443	ret = verify_io_u_crc64(hdr, io_u, hdr_num);
	444	break;
	445	case VERIFY_CRC32:
	446	ret = verify_io_u_crc32(hdr, io_u, hdr_num);
	447	break;
	448	case VERIFY_CRC16:
	449	ret = verify_io_u_crc16(hdr, io_u, hdr_num);
	450	break;
	451	case VERIFY_CRC7:
	452	ret = verify_io_u_crc7(hdr, io_u, hdr_num);
	453	break;
cd14cc10 JA	454	case VERIFY_SHA256:
	455	ret = verify_io_u_sha256(hdr, io_u, hdr_num);
	456	break;
	457	case VERIFY_SHA512:
	458	ret = verify_io_u_sha512(hdr, io_u, hdr_num);
	459	break;
7437ee87 SL	460	case VERIFY_META:
	461	ret = verify_io_u_meta(hdr, td, io_u, hdr_num);
	462	break;
3f9f4e26 SL	463	default:
3f9f4e26 SL	464	log_err("Bad verify type %u\n", hdr->verify_type);
d16d4e09	465	ret = EINVAL;
3f9f4e26	466	}
3f9f4e26	467	}
a7dfe862	468
a12a3b4d	469	return ret;
e29d1b70 JA	470	}
e29d1b70 JA	471
7437ee87	472	static void fill_meta(struct verify_header hdr, struct thread_data td,
5ec10eaa	473	struct io_u *io_u, unsigned int header_num)
7437ee87 SL	474	{
	475	struct vhdr_meta *vh = hdr_priv(hdr);
	476
	477	vh->thread = td->thread_number;
	478
	479	vh->time_sec = io_u->start_time.tv_sec;
	480	vh->time_usec = io_u->start_time.tv_usec;
	481
	482	vh->numberio = td->io_issues[DDIR_WRITE];
	483
	484	vh->offset = io_u->offset + header_num * td->o.verify_interval;
	485	}
	486
cd14cc10 JA	487	static void fill_sha512(struct verify_header hdr, void p, unsigned int len)
cd14cc10 JA	488	{
546dfd9f	489	struct vhdr_sha512 *vh = hdr_priv(hdr);
cd14cc10	490	struct sha512_ctx sha512_ctx = {
546dfd9f	491	.buf = vh->sha512,
cd14cc10 JA	492	};
	493
	494	sha512_init(&sha512_ctx);
	495	sha512_update(&sha512_ctx, p, len);
	496	}
	497
	498	static void fill_sha256(struct verify_header hdr, void p, unsigned int len)
	499	{
546dfd9f	500	struct vhdr_sha256 *vh = hdr_priv(hdr);
cd14cc10	501	struct sha256_ctx sha256_ctx = {
546dfd9f	502	.buf = vh->sha256,
cd14cc10 JA	503	};
	504
	505	sha256_init(&sha256_ctx);
	506	sha256_update(&sha256_ctx, p, len);
	507	}
	508
1e154bdb JA	509	static void fill_crc7(struct verify_header hdr, void p, unsigned int len)
1e154bdb JA	510	{
546dfd9f JA	511	struct vhdr_crc7 *vh = hdr_priv(hdr);
	512
	513	vh->crc7 = crc7(p, len);
1e154bdb JA	514	}
1e154bdb JA	515
969f7ed3 JA	516	static void fill_crc16(struct verify_header hdr, void p, unsigned int len)
969f7ed3 JA	517	{
546dfd9f JA	518	struct vhdr_crc16 *vh = hdr_priv(hdr);
	519
	520	vh->crc16 = crc16(p, len);
969f7ed3 JA	521	}
969f7ed3 JA	522
e29d1b70 JA	523	static void fill_crc32(struct verify_header hdr, void p, unsigned int len)
e29d1b70 JA	524	{
546dfd9f JA	525	struct vhdr_crc32 *vh = hdr_priv(hdr);
	526
	527	vh->crc32 = crc32(p, len);
e29d1b70 JA	528	}
e29d1b70 JA	529
d77a7af3 JA	530	static void fill_crc64(struct verify_header hdr, void p, unsigned int len)
d77a7af3 JA	531	{
546dfd9f JA	532	struct vhdr_crc64 *vh = hdr_priv(hdr);
	533
	534	vh->crc64 = crc64(p, len);
d77a7af3 JA	535	}
d77a7af3 JA	536
e29d1b70 JA	537	static void fill_md5(struct verify_header hdr, void p, unsigned int len)
e29d1b70 JA	538	{
546dfd9f	539	struct vhdr_md5 *vh = hdr_priv(hdr);
8c432325	540	struct md5_ctx md5_ctx = {
546dfd9f	541	.hash = (uint32_t *) vh->md5_digest,
8c432325	542	};
e29d1b70	543
61f821f1	544	md5_init(&md5_ctx);
e29d1b70	545	md5_update(&md5_ctx, p, len);
e29d1b70 JA	546	}
	547
	548	/*
	549	* fill body of io_u->buf with random data and add a header with the
	550	* crc32 or md5 sum of that data.
	551	*/
	552	void populate_verify_io_u(struct thread_data td, struct io_u io_u)
	553	{
baefa9be	554	struct verify_header *hdr;
95646108	555	void p = io_u->buf, data;
7437ee87	556	unsigned int hdr_inc, data_len, header_num = 0;
e29d1b70	557
9cc3d150 JA	558	if (td->o.verify == VERIFY_NULL)
	559	return;
	560
90059d65	561	fill_pattern(td, p, io_u->buflen);
546a9142 SL	562
546a9142 SL	563	hdr_inc = io_u->buflen;
a59e170d JA	564	if (td->o.verify_interval)
a59e170d JA	565	hdr_inc = td->o.verify_interval;
baefa9be	566
5ec10eaa	567	for (; p < io_u->buf + io_u->buflen; p += hdr_inc) {
95646108	568	hdr = p;
3f9f4e26 SL	569
	570	hdr->fio_magic = FIO_HDR_MAGIC;
	571	hdr->verify_type = td->o.verify;
546a9142	572	hdr->len = hdr_inc;
87677832	573	data_len = hdr_inc - hdr_size(hdr);
3f9f4e26	574
87677832	575	data = p + hdr_size(hdr);
3f9f4e26 SL	576	switch (td->o.verify) {
3f9f4e26 SL	577	case VERIFY_MD5:
bd6f78b2 JA	578	dprint(FD_VERIFY, "fill md5 io_u %p, len %u\n",
bd6f78b2 JA	579	io_u, hdr->len);
3f9f4e26 SL	580	fill_md5(hdr, data, data_len);
	581	break;
	582	case VERIFY_CRC64:
bd6f78b2 JA	583	dprint(FD_VERIFY, "fill crc64 io_u %p, len %u\n",
bd6f78b2 JA	584	io_u, hdr->len);
3f9f4e26 SL	585	fill_crc64(hdr, data, data_len);
	586	break;
	587	case VERIFY_CRC32:
bd6f78b2 JA	588	dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
bd6f78b2 JA	589	io_u, hdr->len);
3f9f4e26 SL	590	fill_crc32(hdr, data, data_len);
	591	break;
	592	case VERIFY_CRC16:
bd6f78b2 JA	593	dprint(FD_VERIFY, "fill crc16 io_u %p, len %u\n",
bd6f78b2 JA	594	io_u, hdr->len);
3f9f4e26 SL	595	fill_crc16(hdr, data, data_len);
	596	break;
	597	case VERIFY_CRC7:
bd6f78b2 JA	598	dprint(FD_VERIFY, "fill crc7 io_u %p, len %u\n",
bd6f78b2 JA	599	io_u, hdr->len);
3f9f4e26 SL	600	fill_crc7(hdr, data, data_len);
3f9f4e26 SL	601	break;
cd14cc10	602	case VERIFY_SHA256:
bd6f78b2 JA	603	dprint(FD_VERIFY, "fill sha256 io_u %p, len %u\n",
bd6f78b2 JA	604	io_u, hdr->len);
cd14cc10 JA	605	fill_sha256(hdr, data, data_len);
	606	break;
	607	case VERIFY_SHA512:
bd6f78b2 JA	608	dprint(FD_VERIFY, "fill sha512 io_u %p, len %u\n",
bd6f78b2 JA	609	io_u, hdr->len);
cd14cc10 JA	610	fill_sha512(hdr, data, data_len);
cd14cc10 JA	611	break;
7437ee87	612	case VERIFY_META:
bd6f78b2 JA	613	dprint(FD_VERIFY, "fill meta io_u %p, len %u\n",
bd6f78b2 JA	614	io_u, hdr->len);
7437ee87 SL	615	fill_meta(hdr, td, io_u, header_num);
7437ee87 SL	616	break;
3f9f4e26 SL	617	default:
	618	log_err("fio: bad verify type: %d\n", td->o.verify);
	619	assert(0);
	620	}
a59e170d	621	if (td->o.verify_offset)
87677832	622	memswp(p, p + td->o.verify_offset, hdr_size(hdr));
7437ee87	623	header_num++;
e29d1b70	624	}
e29d1b70 JA	625	}
	626
	627	int get_next_verify(struct thread_data td, struct io_u io_u)
	628	{
8de8f047	629	struct io_piece *ipo = NULL;
e29d1b70	630
d2d7fa53 JA	631	/*
	632	* this io_u is from a requeue, we already filled the offsets
	633	*/
	634	if (io_u->file)
	635	return 0;
	636
8de8f047 JA	637	if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
8de8f047 JA	638	struct rb_node *n = rb_first(&td->io_hist_tree);
e29d1b70	639
8de8f047	640	ipo = rb_entry(n, struct io_piece, rb_node);
4b87898e	641	rb_erase(n, &td->io_hist_tree);
8de8f047 JA	642	} else if (!list_empty(&td->io_hist_list)) {
	643	ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
	644	list_del(&ipo->list);
	645	}
e29d1b70	646
8de8f047	647	if (ipo) {
e29d1b70 JA	648	io_u->offset = ipo->offset;
e29d1b70 JA	649	io_u->buflen = ipo->len;
36167d82	650	io_u->file = ipo->file;
97af62ce JA	651
	652	if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
	653	int r = td_io_open_file(td, io_u->file);
	654
bd6f78b2 JA	655	if (r) {
	656	dprint(FD_VERIFY, "failed file %s open\n",
	657	io_u->file->file_name);
97af62ce	658	return 1;
bd6f78b2	659	}
97af62ce JA	660	}
	661
	662	get_file(ipo->file);
	663	assert(io_u->file->flags & FIO_FILE_OPEN);
e29d1b70	664	io_u->ddir = DDIR_READ;
36167d82 JA	665	io_u->xfer_buf = io_u->buf;
36167d82 JA	666	io_u->xfer_buflen = io_u->buflen;
e29d1b70	667	free(ipo);
bd6f78b2	668	dprint(FD_VERIFY, "get_next_verify: ret io_u %p\n", io_u);
e29d1b70 JA	669	return 0;
	670	}
	671
bd6f78b2	672	dprint(FD_VERIFY, "get_next_verify: empty\n");
e29d1b70 JA	673	return 1;
e29d1b70 JA	674	}