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