[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;
	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_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;
		default:
			log_err("Bad verify type %u\n", hdr->verify_type);
			ret = 1;
		}
		hdr_num++;
	}

	return 0;
}

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;

	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;
		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));
	}
}

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	default:
	137	log_err("fio: unknown verify header!\n");
	138	assert(0);
	139	}
	140
	141	return len + sizeof(struct verify_header);
	142	}
	143
	144	static inline unsigned int hdr_size(struct verify_header *hdr)
	145	{
	146	return __hdr_size(hdr->verify_type);
	147	}
	148
	149	static void hdr_priv(struct verify_header hdr)
	150	{
	151	void *priv = hdr;
	152
	153	return priv + sizeof(struct verify_header);
	154	}
	155
	156	/*
	157	* Return data area 'header_num'
	158	*/
	159	static inline void io_u_verify_off(struct verify_header hdr,
	160	struct io_u *io_u,
	161	unsigned char header_num)
	162	{
	163	return io_u->buf + header_num * hdr->len + hdr_size(hdr);
	164	}
	165
	166	static int verify_io_u_sha512(struct verify_header hdr, struct io_u io_u,
	167	unsigned int header_num)
	168	{
	169	void *p = io_u_verify_off(hdr, io_u, header_num);
	170	struct vhdr_sha512 *vh = hdr_priv(hdr);
	171	uint8_t sha512[128];
	172	struct sha512_ctx sha512_ctx = {
	173	.buf = sha512,
	174	};
	175
	176	sha512_init(&sha512_ctx);
	177	sha512_update(&sha512_ctx, p, hdr->len - hdr_size(hdr));
	178
	179	if (memcmp(vh->sha512, sha512_ctx.buf, sizeof(sha512))) {
	180	log_err("sha512: verify failed at %llu/%u\n",
	181	io_u->offset + header_num * hdr->len,
	182	hdr->len);
	183	hexdump(vh->sha512, sizeof(vh->sha512));
	184	hexdump(sha512_ctx.buf, sizeof(sha512));
	185	return 1;
	186	}
	187
	188	return 0;
	189	}
	190
	191	static int verify_io_u_sha256(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);
	195	struct vhdr_sha256 *vh = hdr_priv(hdr);
	196	uint8_t sha256[128];
	197	struct sha256_ctx sha256_ctx = {
	198	.buf = sha256,
	199	};
	200
	201	sha256_init(&sha256_ctx);
	202	sha256_update(&sha256_ctx, p, hdr->len - hdr_size(hdr));
	203
	204	if (memcmp(vh->sha256, sha256_ctx.buf, sizeof(sha256))) {
	205	log_err("sha256: verify failed at %llu/%u\n",
	206	io_u->offset + header_num * hdr->len,
	207	hdr->len);
	208	hexdump(vh->sha256, sizeof(vh->sha256));
	209	hexdump(sha256_ctx.buf, sizeof(sha256));
	210	return 1;
	211	}
	212
	213	return 0;
	214	}
	215
	216	static int verify_io_u_crc7(struct verify_header hdr, struct io_u io_u,
	217	unsigned char header_num)
	218	{
	219	void *p = io_u_verify_off(hdr, io_u, header_num);
	220	struct vhdr_crc7 *vh = hdr_priv(hdr);
	221	unsigned char c;
	222
	223	c = crc7(p, hdr->len - hdr_size(hdr));
	224
	225	if (c != vh->crc7) {
	226	log_err("crc7: verify failed at %llu/%u\n",
	227	io_u->offset + header_num * hdr->len,
	228	hdr->len);
	229	log_err("crc7: wanted %x, got %x\n", vh->crc7, c);
	230	return 1;
	231	}
	232
	233	return 0;
	234	}
	235
	236	static int verify_io_u_crc16(struct verify_header hdr, struct io_u io_u,
	237	unsigned int header_num)
	238	{
	239	void *p = io_u_verify_off(hdr, io_u, header_num);
	240	struct vhdr_crc16 *vh = hdr_priv(hdr);
	241	unsigned short c;
	242
	243	c = crc16(p, hdr->len - hdr_size(hdr));
	244
	245	if (c != vh->crc16) {
	246	log_err("crc16: verify failed at %llu/%u\n",
	247	io_u->offset + header_num * hdr->len,
	248	hdr->len);
	249	log_err("crc16: wanted %x, got %x\n", vh->crc16, c);
	250	return 1;
	251	}
	252
	253	return 0;
	254	}
	255
	256	static int verify_io_u_crc64(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_crc64 *vh = hdr_priv(hdr);
	261	unsigned long long c;
	262
	263	c = crc64(p, hdr->len - hdr_size(hdr));
	264
	265	if (c != vh->crc64) {
	266	log_err("crc64: verify failed at %llu/%u\n",
	267	io_u->offset + header_num * hdr->len,
	268	hdr->len);
	269	log_err("crc64: wanted %llx, got %llx\n", (unsigned long long) vh->crc64, c);
	270	return 1;
	271	}
	272
	273	return 0;
	274	}
	275
	276	static int verify_io_u_crc32(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_crc32 *vh = hdr_priv(hdr);
	281	uint32_t c;
	282
	283	c = crc32(p, hdr->len - hdr_size(hdr));
	284
	285	if (c != vh->crc32) {
	286	log_err("crc32: verify failed at %llu/%u\n",
	287	io_u->offset + header_num * hdr->len,
	288	hdr->len);
	289	log_err("crc32: wanted %x, got %x\n", vh->crc32, c);
	290	return 1;
	291	}
	292
	293	return 0;
	294	}
	295
	296	static int verify_io_u_md5(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_md5 *vh = hdr_priv(hdr);
	301	uint32_t hash[MD5_HASH_WORDS];
	302	struct md5_ctx md5_ctx = {
	303	.hash = hash,
	304	};
	305
	306	md5_init(&md5_ctx);
	307	md5_update(&md5_ctx, p, hdr->len - hdr_size(hdr));
	308
	309	if (memcmp(vh->md5_digest, md5_ctx.hash, sizeof(hash))) {
	310	log_err("md5: verify failed at %llu/%u\n",
	311	io_u->offset + header_num * hdr->len,
	312	hdr->len);
	313	hexdump(vh->md5_digest, sizeof(vh->md5_digest));
	314	hexdump(md5_ctx.hash, sizeof(hash));
	315	return 1;
	316	}
	317
	318	return 0;
	319	}
	320
	321	int verify_io_u(struct thread_data td, struct io_u io_u)
	322	{
	323	struct verify_header *hdr;
	324	unsigned int hdr_inc, hdr_num = 0;
	325	void *p;
	326	int ret;
	327
	328	if (td->o.verify == VERIFY_NULL \|\| io_u->ddir != DDIR_READ)
	329	return 0;
	330
	331	hdr_inc = io_u->buflen;
	332	if (td->o.verify_interval)
	333	hdr_inc = td->o.verify_interval;
	334
	335	for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) {
	336	if (td->o.verify_offset)
	337	memswp(p, p + td->o.verify_offset, __hdr_size(td->o.verify));
	338
	339	hdr = p;
	340
	341	if (hdr->fio_magic != FIO_HDR_MAGIC) {
	342	log_err("Bad verify header %x\n", hdr->fio_magic);
	343	return EIO;
	344	}
	345
	346	switch (hdr->verify_type) {
	347	case VERIFY_MD5:
	348	ret = verify_io_u_md5(hdr, io_u, hdr_num);
	349	break;
	350	case VERIFY_CRC64:
	351	ret = verify_io_u_crc64(hdr, io_u, hdr_num);
	352	break;
	353	case VERIFY_CRC32:
	354	ret = verify_io_u_crc32(hdr, io_u, hdr_num);
	355	break;
	356	case VERIFY_CRC16:
	357	ret = verify_io_u_crc16(hdr, io_u, hdr_num);
	358	break;
	359	case VERIFY_CRC7:
	360	ret = verify_io_u_crc7(hdr, io_u, hdr_num);
	361	break;
	362	case VERIFY_SHA256:
	363	ret = verify_io_u_sha256(hdr, io_u, hdr_num);
	364	break;
	365	case VERIFY_SHA512:
	366	ret = verify_io_u_sha512(hdr, io_u, hdr_num);
	367	break;
	368	default:
	369	log_err("Bad verify type %u\n", hdr->verify_type);
	370	ret = 1;
	371	}
	372	hdr_num++;
	373	}
	374
	375	return 0;
	376	}
	377
	378	static void fill_sha512(struct verify_header hdr, void p, unsigned int len)
	379	{
	380	struct vhdr_sha512 *vh = hdr_priv(hdr);
	381	struct sha512_ctx sha512_ctx = {
	382	.buf = vh->sha512,
	383	};
	384
	385	sha512_init(&sha512_ctx);
	386	sha512_update(&sha512_ctx, p, len);
	387	}
	388
	389	static void fill_sha256(struct verify_header hdr, void p, unsigned int len)
	390	{
	391	struct vhdr_sha256 *vh = hdr_priv(hdr);
	392	struct sha256_ctx sha256_ctx = {
	393	.buf = vh->sha256,
	394	};
	395
	396	sha256_init(&sha256_ctx);
	397	sha256_update(&sha256_ctx, p, len);
	398	}
	399
	400	static void fill_crc7(struct verify_header hdr, void p, unsigned int len)
	401	{
	402	struct vhdr_crc7 *vh = hdr_priv(hdr);
	403
	404	vh->crc7 = crc7(p, len);
	405	}
	406
	407	static void fill_crc16(struct verify_header hdr, void p, unsigned int len)
	408	{
	409	struct vhdr_crc16 *vh = hdr_priv(hdr);
	410
	411	vh->crc16 = crc16(p, len);
	412	}
	413
	414	static void fill_crc32(struct verify_header hdr, void p, unsigned int len)
	415	{
	416	struct vhdr_crc32 *vh = hdr_priv(hdr);
	417
	418	vh->crc32 = crc32(p, len);
	419	}
	420
	421	static void fill_crc64(struct verify_header hdr, void p, unsigned int len)
	422	{
	423	struct vhdr_crc64 *vh = hdr_priv(hdr);
	424
	425	vh->crc64 = crc64(p, len);
	426	}
	427
	428	static void fill_md5(struct verify_header hdr, void p, unsigned int len)
	429	{
	430	struct vhdr_md5 *vh = hdr_priv(hdr);
	431	struct md5_ctx md5_ctx = {
	432	.hash = (uint32_t *) vh->md5_digest,
	433	};
	434
	435	md5_init(&md5_ctx);
	436	md5_update(&md5_ctx, p, len);
	437	}
	438
	439	/*
	440	* fill body of io_u->buf with random data and add a header with the
	441	* crc32 or md5 sum of that data.
	442	*/
	443	void populate_verify_io_u(struct thread_data td, struct io_u io_u)
	444	{
	445	struct verify_header *hdr;
	446	void p = io_u->buf, data;
	447	unsigned int hdr_inc, data_len;
	448
	449	if (td->o.verify == VERIFY_NULL)
	450	return;
	451
	452	fill_pattern(td, p, io_u->buflen);
	453
	454	hdr_inc = io_u->buflen;
	455	if (td->o.verify_interval)
	456	hdr_inc = td->o.verify_interval;
	457
	458	for (;p < io_u->buf + io_u->buflen; p += hdr_inc) {
	459	hdr = p;
	460
	461	hdr->fio_magic = FIO_HDR_MAGIC;
	462	hdr->verify_type = td->o.verify;
	463	hdr->len = hdr_inc;
	464	data_len = hdr_inc - hdr_size(hdr);
	465
	466	data = p + hdr_size(hdr);
	467	switch (td->o.verify) {
	468	case VERIFY_MD5:
	469	fill_md5(hdr, data, data_len);
	470	break;
	471	case VERIFY_CRC64:
	472	fill_crc64(hdr, data, data_len);
	473	break;
	474	case VERIFY_CRC32:
	475	fill_crc32(hdr, data, data_len);
	476	break;
	477	case VERIFY_CRC16:
	478	fill_crc16(hdr, data, data_len);
	479	break;
	480	case VERIFY_CRC7:
	481	fill_crc7(hdr, data, data_len);
	482	break;
	483	case VERIFY_SHA256:
	484	fill_sha256(hdr, data, data_len);
	485	break;
	486	case VERIFY_SHA512:
	487	fill_sha512(hdr, data, data_len);
	488	break;
	489	default:
	490	log_err("fio: bad verify type: %d\n", td->o.verify);
	491	assert(0);
	492	}
	493	if (td->o.verify_offset)
	494	memswp(p, p + td->o.verify_offset, hdr_size(hdr));
	495	}
	496	}
	497
	498	int get_next_verify(struct thread_data td, struct io_u io_u)
	499	{
	500	struct io_piece *ipo = NULL;
	501
	502	/*
	503	* this io_u is from a requeue, we already filled the offsets
	504	*/
	505	if (io_u->file)
	506	return 0;
	507
	508	if (!RB_EMPTY_ROOT(&td->io_hist_tree)) {
	509	struct rb_node *n = rb_first(&td->io_hist_tree);
	510
	511	ipo = rb_entry(n, struct io_piece, rb_node);
	512	rb_erase(n, &td->io_hist_tree);
	513	} else if (!list_empty(&td->io_hist_list)) {
	514	ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
	515	list_del(&ipo->list);
	516	}
	517
	518	if (ipo) {
	519	io_u->offset = ipo->offset;
	520	io_u->buflen = ipo->len;
	521	io_u->file = ipo->file;
	522
	523	if ((io_u->file->flags & FIO_FILE_OPEN) == 0) {
	524	int r = td_io_open_file(td, io_u->file);
	525
	526	if (r)
	527	return 1;
	528	}
	529
	530	get_file(ipo->file);
	531	assert(io_u->file->flags & FIO_FILE_OPEN);
	532	io_u->ddir = DDIR_READ;
	533	io_u->xfer_buf = io_u->buf;
	534	io_u->xfer_buflen = io_u->buflen;
	535	free(ipo);
	536	return 0;
	537	}
	538
	539	return 1;
	540	}