[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:
		fill_random_bytes(td, p, len);
		break;
	case 1:
		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;

		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);

	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 1;
	}

	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,
	};

	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 1;
	}

	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,
	};

	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 1;
	}

	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;

	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 1;
	}

	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;

	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 1;
	}

	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;

	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 1;
	}

	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;

	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 1;
	}

	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,
	};

	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 1;
	}

	return 0;
}

int verify_io_u(struct thread_data *td, struct io_u *io_u)
{
	struct verify_header *hdr;
	unsigned int 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;

	for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) {
		if (td->o.verify_offset)
			memswp(p, p + td->o.verify_offset, __hdr_size(td->o.verify));

		hdr = p;

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

		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 = 1;
		}
		hdr_num++;
	}

	return 0;
}

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:
			fill_md5(hdr, data, data_len);
			break;
		case VERIFY_CRC64:
			fill_crc64(hdr, data, data_len);
			break;
		case VERIFY_CRC32:
			fill_crc32(hdr, data, data_len);
			break;
		case VERIFY_CRC16:
			fill_crc16(hdr, data, data_len);
			break;
		case VERIFY_CRC7:
			fill_crc7(hdr, data, data_len);
			break;
		case VERIFY_SHA256:
			fill_sha256(hdr, data, data_len);
			break;
		case VERIFY_SHA512:
			fill_sha512(hdr, data, data_len);
			break;
		case VERIFY_META:
			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)
				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);
		return 0;
	}

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