[fio.git] / engines / http.c

/*
 * HTTP GET/PUT IO engine
 *
 * IO engine to perform HTTP(S) GET/PUT requests via libcurl-easy.
 *
 * Copyright (C) 2018 SUSE LLC
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2 as published by the Free Software Foundation..
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include <pthread.h>
#include <time.h>
#include <curl/curl.h>
#include <openssl/hmac.h>
#include <openssl/sha.h>
#include <openssl/md5.h>
#include "fio.h"
#include "../optgroup.h"

/*
 * Silence OpenSSL 3.0 deprecated function warnings
 */
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"

enum {
	FIO_HTTP_WEBDAV	    = 0,
	FIO_HTTP_S3	    = 1,
	FIO_HTTP_SWIFT	    = 2,

	FIO_HTTPS_OFF	    = 0,
	FIO_HTTPS_ON	    = 1,
	FIO_HTTPS_INSECURE  = 2,
};

struct http_data {
	CURL *curl;
};

struct http_options {
	void *pad;
	unsigned int https;
	char *host;
	char *user;
	char *pass;
	char *s3_key;
	char *s3_keyid;
	char *s3_region;
	char *swift_auth_token;
	int verbose;
	unsigned int mode;
};

struct http_curl_stream {
	char *buf;
	size_t pos;
	size_t max;
};

static struct fio_option options[] = {
	{
		.name     = "https",
		.lname    = "https",
		.type     = FIO_OPT_STR,
		.help     = "Enable https",
		.off1     = offsetof(struct http_options, https),
		.def      = "off",
		.posval = {
			  { .ival = "off",
			    .oval = FIO_HTTPS_OFF,
			    .help = "No HTTPS",
			  },
			  { .ival = "on",
			    .oval = FIO_HTTPS_ON,
			    .help = "Enable HTTPS",
			  },
			  { .ival = "insecure",
			    .oval = FIO_HTTPS_INSECURE,
			    .help = "Enable HTTPS, disable peer verification",
			  },
		},
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_host",
		.lname    = "http_host",
		.type     = FIO_OPT_STR_STORE,
		.help     = "Hostname (S3 bucket)",
		.off1     = offsetof(struct http_options, host),
		.def	  = "localhost",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_user",
		.lname    = "http_user",
		.type     = FIO_OPT_STR_STORE,
		.help     = "HTTP user name",
		.off1     = offsetof(struct http_options, user),
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_pass",
		.lname    = "http_pass",
		.type     = FIO_OPT_STR_STORE,
		.help     = "HTTP password",
		.off1     = offsetof(struct http_options, pass),
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_s3_key",
		.lname    = "S3 secret key",
		.type     = FIO_OPT_STR_STORE,
		.help     = "S3 secret key",
		.off1     = offsetof(struct http_options, s3_key),
		.def	  = "",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_s3_keyid",
		.lname    = "S3 key id",
		.type     = FIO_OPT_STR_STORE,
		.help     = "S3 key id",
		.off1     = offsetof(struct http_options, s3_keyid),
		.def	  = "",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_swift_auth_token",
		.lname    = "Swift auth token",
		.type     = FIO_OPT_STR_STORE,
		.help     = "OpenStack Swift auth token",
		.off1     = offsetof(struct http_options, swift_auth_token),
		.def	  = "",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_s3_region",
		.lname    = "S3 region",
		.type     = FIO_OPT_STR_STORE,
		.help     = "S3 region",
		.off1     = offsetof(struct http_options, s3_region),
		.def	  = "us-east-1",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_mode",
		.lname    = "Request mode to use",
		.type     = FIO_OPT_STR,
		.help     = "Whether to use WebDAV, Swift, or S3",
		.off1     = offsetof(struct http_options, mode),
		.def	  = "webdav",
		.posval = {
			  { .ival = "webdav",
			    .oval = FIO_HTTP_WEBDAV,
			    .help = "WebDAV server",
			  },
			  { .ival = "s3",
			    .oval = FIO_HTTP_S3,
			    .help = "S3 storage backend",
			  },
			  { .ival = "swift",
			    .oval = FIO_HTTP_SWIFT,
			    .help = "OpenStack Swift storage",
			  },
		},
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = "http_verbose",
		.lname    = "HTTP verbosity level",
		.type     = FIO_OPT_INT,
		.help     = "increase http engine verbosity",
		.off1     = offsetof(struct http_options, verbose),
		.def	  = "0",
		.category = FIO_OPT_C_ENGINE,
		.group    = FIO_OPT_G_HTTP,
	},
	{
		.name     = NULL,
	},
};

static char *_aws_uriencode(const char *uri)
{
	size_t bufsize = 1024;
	char *r = malloc(bufsize);
	char c;
	int i, n;
	const char *hex = "0123456789ABCDEF";

	if (!r) {
		log_err("malloc failed\n");
		return NULL;
	}

	n = 0;
	for (i = 0; (c = uri[i]); i++) {
		if (n > bufsize-5) {
			log_err("encoding the URL failed\n");
			return NULL;
		}

		if ( (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')
		|| (c >= '0' && c <= '9') || c == '_' || c == '-'
		|| c == '~' || c == '.' || c == '/')
			r[n++] = c;
		else {
			r[n++] = '%';
			r[n++] = hex[(c >> 4 ) & 0xF];
			r[n++] = hex[c & 0xF];
		}
	}
	r[n++] = 0;
	return r;
}

static char *_conv_hex(const unsigned char *p, size_t len)
{
	char *r;
	int i,n;
	const char *hex = "0123456789abcdef";
	r = malloc(len * 2 + 1);
	n = 0;
	for (i = 0; i < len; i++) {
		r[n++] = hex[(p[i] >> 4 ) & 0xF];
		r[n++] = hex[p[i] & 0xF];
	}
	r[n] = 0;

	return r;
}

static char *_gen_hex_sha256(const char *p, size_t len)
{
	unsigned char hash[SHA256_DIGEST_LENGTH];

	SHA256((unsigned char*)p, len, hash);
	return _conv_hex(hash, SHA256_DIGEST_LENGTH);
}

static char *_gen_hex_md5(const char *p, size_t len)
{
	unsigned char hash[MD5_DIGEST_LENGTH];

	MD5((unsigned char*)p, len, hash);
	return _conv_hex(hash, MD5_DIGEST_LENGTH);
}

static void _hmac(unsigned char *md, void *key, int key_len, char *data) {
#ifndef CONFIG_HAVE_OPAQUE_HMAC_CTX
	HMAC_CTX _ctx;
#endif
	HMAC_CTX *ctx;
	unsigned int hmac_len;

#ifdef CONFIG_HAVE_OPAQUE_HMAC_CTX
	ctx = HMAC_CTX_new();
#else
	ctx = &_ctx;
	/* work-around crash in certain versions of libssl */
	HMAC_CTX_init(ctx);
#endif
	HMAC_Init_ex(ctx, key, key_len, EVP_sha256(), NULL);
	HMAC_Update(ctx, (unsigned char*)data, strlen(data));
	HMAC_Final(ctx, md, &hmac_len);
#ifdef CONFIG_HAVE_OPAQUE_HMAC_CTX
	HMAC_CTX_free(ctx);
#else
	HMAC_CTX_cleanup(ctx);
#endif
}

static int _curl_trace(CURL *handle, curl_infotype type,
	     char *data, size_t size,
	     void *userp)
{
	const char *text;
	(void)handle; /* prevent compiler warning */
	(void)userp;

	switch (type) {
	case CURLINFO_TEXT:
		fprintf(stderr, "== Info: %s", data);
		fio_fallthrough;
	default:
	case CURLINFO_SSL_DATA_OUT:
	case CURLINFO_SSL_DATA_IN:
		return 0;

	case CURLINFO_HEADER_OUT:
		text = "=> Send header";
		break;
	case CURLINFO_DATA_OUT:
		text = "=> Send data";
		break;
	case CURLINFO_HEADER_IN:
		text = "<= Recv header";
		break;
	case CURLINFO_DATA_IN:
		text = "<= Recv data";
		break;
	}

	log_info("%s: %s", text, data);
	return 0;
}

/* https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html
 * https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html#signing-request-intro
 */
static void _add_aws_auth_header(CURL *curl, struct curl_slist *slist, struct http_options *o,
		int op, const char *uri, char *buf, size_t len)
{
	char date_short[16];
	char date_iso[32];
	char method[8];
	char dkey[128];
	char creq[512];
	char sts[256];
	char s[512];
	char *uri_encoded = NULL;
	char *dsha = NULL;
	char *csha = NULL;
	char *signature = NULL;
	const char *service = "s3";
	const char *aws = "aws4_request";
	unsigned char md[SHA256_DIGEST_LENGTH];

	time_t t = time(NULL);
	struct tm *gtm = gmtime(&t);

	strftime (date_short, sizeof(date_short), "%Y%m%d", gtm);
	strftime (date_iso, sizeof(date_iso), "%Y%m%dT%H%M%SZ", gtm);
	uri_encoded = _aws_uriencode(uri);

	if (op == DDIR_WRITE) {
		dsha = _gen_hex_sha256(buf, len);
		sprintf(method, "PUT");
	} else {
		/* DDIR_READ && DDIR_TRIM supply an empty body */
		if (op == DDIR_READ)
			sprintf(method, "GET");
		else
			sprintf(method, "DELETE");
		dsha = _gen_hex_sha256("", 0);
	}

	/* Create the canonical request first */
	snprintf(creq, sizeof(creq),
	"%s\n"
	"%s\n"
	"\n"
	"host:%s\n"
	"x-amz-content-sha256:%s\n"
	"x-amz-date:%s\n"
	"\n"
	"host;x-amz-content-sha256;x-amz-date\n"
	"%s"
	, method
	, uri_encoded, o->host, dsha, date_iso, dsha);

	csha = _gen_hex_sha256(creq, strlen(creq));
	snprintf(sts, sizeof(sts), "AWS4-HMAC-SHA256\n%s\n%s/%s/%s/%s\n%s",
		date_iso, date_short, o->s3_region, service, aws, csha);

	snprintf((char *)dkey, sizeof(dkey), "AWS4%s", o->s3_key);
	_hmac(md, dkey, strlen(dkey), date_short);
	_hmac(md, md, SHA256_DIGEST_LENGTH, o->s3_region);
	_hmac(md, md, SHA256_DIGEST_LENGTH, (char*) service);
	_hmac(md, md, SHA256_DIGEST_LENGTH, (char*) aws);
	_hmac(md, md, SHA256_DIGEST_LENGTH, sts);

	signature = _conv_hex(md, SHA256_DIGEST_LENGTH);

	/* Suppress automatic Accept: header */
	slist = curl_slist_append(slist, "Accept:");

	snprintf(s, sizeof(s), "x-amz-content-sha256: %s", dsha);
	slist = curl_slist_append(slist, s);

	snprintf(s, sizeof(s), "x-amz-date: %s", date_iso);
	slist = curl_slist_append(slist, s);

	snprintf(s, sizeof(s), "Authorization: AWS4-HMAC-SHA256 Credential=%s/%s/%s/s3/aws4_request,"
	"SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=%s",
	o->s3_keyid, date_short, o->s3_region, signature);
	slist = curl_slist_append(slist, s);

	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);

	free(uri_encoded);
	free(csha);
	free(dsha);
	free(signature);
}

static void _add_swift_header(CURL *curl, struct curl_slist *slist, struct http_options *o,
		int op, const char *uri, char *buf, size_t len)
{
	char *dsha = NULL;
	char s[512];

	if (op == DDIR_WRITE) {
		dsha = _gen_hex_md5(buf, len);
	}
	/* Suppress automatic Accept: header */
	slist = curl_slist_append(slist, "Accept:");

	snprintf(s, sizeof(s), "etag: %s", dsha);
	slist = curl_slist_append(slist, s);

	snprintf(s, sizeof(s), "x-auth-token: %s", o->swift_auth_token);
	slist = curl_slist_append(slist, s);

	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);

	free(dsha);
}

static void fio_http_cleanup(struct thread_data *td)
{
	struct http_data *http = td->io_ops_data;

	if (http) {
		curl_easy_cleanup(http->curl);
		free(http);
	}
}

static size_t _http_read(void *ptr, size_t size, size_t nmemb, void *stream)
{
	struct http_curl_stream *state = stream;
	size_t len = size * nmemb;
	/* We're retrieving; nothing is supposed to be read locally */
	if (!stream)
		return 0;
	if (len+state->pos > state->max)
		len = state->max - state->pos;
	memcpy(ptr, &state->buf[state->pos], len);
	state->pos += len;
	return len;
}

static size_t _http_write(void *ptr, size_t size, size_t nmemb, void *stream)
{
	struct http_curl_stream *state = stream;
	/* We're just discarding the returned body after a PUT */
	if (!stream)
		return nmemb;
	if (size != 1)
		return CURLE_WRITE_ERROR;
	if (nmemb + state->pos > state->max)
		return CURLE_WRITE_ERROR;
	memcpy(&state->buf[state->pos], ptr, nmemb);
	state->pos += nmemb;
	return nmemb;
}

static int _http_seek(void *stream, curl_off_t offset, int origin)
{
	struct http_curl_stream *state = stream;
	if (offset < state->max && origin == SEEK_SET) {
		state->pos = offset;
		return CURL_SEEKFUNC_OK;
	} else
		return CURL_SEEKFUNC_FAIL;
}

static enum fio_q_status fio_http_queue(struct thread_data *td,
					 struct io_u *io_u)
{
	struct http_data *http = td->io_ops_data;
	struct http_options *o = td->eo;
	struct http_curl_stream _curl_stream;
	struct curl_slist *slist = NULL;
	char object[512];
	char url[1024];
	long status;
	CURLcode res;
	int r = -1;

	fio_ro_check(td, io_u);
	memset(&_curl_stream, 0, sizeof(_curl_stream));
	snprintf(object, sizeof(object), "%s_%llu_%llu", td->files[0]->file_name,
		io_u->offset, io_u->xfer_buflen);
	if (o->https == FIO_HTTPS_OFF)
		snprintf(url, sizeof(url), "http://%s%s", o->host, object);
	else
		snprintf(url, sizeof(url), "https://%s%s", o->host, object);
	curl_easy_setopt(http->curl, CURLOPT_URL, url);
	_curl_stream.buf = io_u->xfer_buf;
	_curl_stream.max = io_u->xfer_buflen;
	curl_easy_setopt(http->curl, CURLOPT_SEEKDATA, &_curl_stream);
	curl_easy_setopt(http->curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)io_u->xfer_buflen);

	if (o->mode == FIO_HTTP_S3)
		_add_aws_auth_header(http->curl, slist, o, io_u->ddir, object,
			io_u->xfer_buf, io_u->xfer_buflen);
	else if (o->mode == FIO_HTTP_SWIFT)
		_add_swift_header(http->curl, slist, o, io_u->ddir, object,
			io_u->xfer_buf, io_u->xfer_buflen);

	if (io_u->ddir == DDIR_WRITE) {
		curl_easy_setopt(http->curl, CURLOPT_READDATA, &_curl_stream);
		curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, NULL);
		curl_easy_setopt(http->curl, CURLOPT_UPLOAD, 1L);
		res = curl_easy_perform(http->curl);
		if (res == CURLE_OK) {
			curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
			if (status == 100 || (status >= 200 && status <= 204))
				goto out;
			log_err("DDIR_WRITE failed with HTTP status code %ld\n", status);
		}
		goto err;
	} else if (io_u->ddir == DDIR_READ) {
		curl_easy_setopt(http->curl, CURLOPT_READDATA, NULL);
		curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, &_curl_stream);
		curl_easy_setopt(http->curl, CURLOPT_HTTPGET, 1L);
		res = curl_easy_perform(http->curl);
		if (res == CURLE_OK) {
			curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
			if (status == 200)
				goto out;
			else if (status == 404) {
				/* Object doesn't exist. Pretend we read
				 * zeroes */
				memset(io_u->xfer_buf, 0, io_u->xfer_buflen);
				goto out;
			}
			log_err("DDIR_READ failed with HTTP status code %ld\n", status);
		}
		goto err;
	} else if (io_u->ddir == DDIR_TRIM) {
		curl_easy_setopt(http->curl, CURLOPT_HTTPGET, 1L);
		curl_easy_setopt(http->curl, CURLOPT_CUSTOMREQUEST, "DELETE");
		curl_easy_setopt(http->curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)0);
		curl_easy_setopt(http->curl, CURLOPT_READDATA, NULL);
		curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, NULL);
		res = curl_easy_perform(http->curl);
		if (res == CURLE_OK) {
			curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
			if (status == 200 || status == 202 || status == 204 || status == 404)
				goto out;
			log_err("DDIR_TRIM failed with HTTP status code %ld\n", status);
		}
		goto err;
	}

	log_err("WARNING: Only DDIR_READ/DDIR_WRITE/DDIR_TRIM are supported!\n");

err:
	io_u->error = r;
	td_verror(td, io_u->error, "transfer");
out:
	curl_slist_free_all(slist);
	return FIO_Q_COMPLETED;
}

static struct io_u *fio_http_event(struct thread_data *td, int event)
{
	/* sync IO engine - never any outstanding events */
	return NULL;
}

int fio_http_getevents(struct thread_data *td, unsigned int min,
	unsigned int max, const struct timespec *t)
{
	/* sync IO engine - never any outstanding events */
	return 0;
}

static int fio_http_setup(struct thread_data *td)
{
	struct http_data *http = NULL;
	struct http_options *o = td->eo;

	/* allocate engine specific structure to deal with libhttp. */
	http = calloc(1, sizeof(*http));
	if (!http) {
		log_err("calloc failed.\n");
		goto cleanup;
	}

	http->curl = curl_easy_init();
	if (o->verbose)
		curl_easy_setopt(http->curl, CURLOPT_VERBOSE, 1L);
	if (o->verbose > 1)
		curl_easy_setopt(http->curl, CURLOPT_DEBUGFUNCTION, &_curl_trace);
	curl_easy_setopt(http->curl, CURLOPT_NOPROGRESS, 1L);
	curl_easy_setopt(http->curl, CURLOPT_FOLLOWLOCATION, 1L);
	curl_easy_setopt(http->curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP|CURLPROTO_HTTPS);
	if (o->https == FIO_HTTPS_INSECURE) {
		curl_easy_setopt(http->curl, CURLOPT_SSL_VERIFYPEER, 0L);
		curl_easy_setopt(http->curl, CURLOPT_SSL_VERIFYHOST, 0L);
	}
	curl_easy_setopt(http->curl, CURLOPT_READFUNCTION, _http_read);
	curl_easy_setopt(http->curl, CURLOPT_WRITEFUNCTION, _http_write);
	curl_easy_setopt(http->curl, CURLOPT_SEEKFUNCTION, &_http_seek);
	if (o->user && o->pass) {
		curl_easy_setopt(http->curl, CURLOPT_USERNAME, o->user);
		curl_easy_setopt(http->curl, CURLOPT_PASSWORD, o->pass);
		curl_easy_setopt(http->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
	}

	td->io_ops_data = http;

	/* Force single process mode. */
	td->o.use_thread = 1;

	return 0;
cleanup:
	fio_http_cleanup(td);
	return 1;
}

static int fio_http_open(struct thread_data *td, struct fio_file *f)
{
	return 0;
}
static int fio_http_invalidate(struct thread_data *td, struct fio_file *f)
{
	return 0;
}

FIO_STATIC struct ioengine_ops ioengine = {
	.name = "http",
	.version		= FIO_IOOPS_VERSION,
	.flags			= FIO_DISKLESSIO | FIO_SYNCIO,
	.setup			= fio_http_setup,
	.queue			= fio_http_queue,
	.getevents		= fio_http_getevents,
	.event			= fio_http_event,
	.cleanup		= fio_http_cleanup,
	.open_file		= fio_http_open,
	.invalidate		= fio_http_invalidate,
	.options		= options,
	.option_struct_size	= sizeof(struct http_options),
};

static void fio_init fio_http_register(void)
{
	register_ioengine(&ioengine);
}

static void fio_exit fio_http_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
c2f6a13d LMB	1	/*
	2	* HTTP GET/PUT IO engine
	3	*
	4	* IO engine to perform HTTP(S) GET/PUT requests via libcurl-easy.
	5	*
	6	* Copyright (C) 2018 SUSE LLC
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License,
	10	* version 2 as published by the Free Software Foundation..
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public
	18	* License along with this program; if not, write to the Free
	19	* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	20	* Boston, MA 02110-1301, USA.
	21	*/
	22
	23	#include <pthread.h>
	24	#include <time.h>
	25	#include <curl/curl.h>
	26	#include <openssl/hmac.h>
	27	#include <openssl/sha.h>
09fd2966	28	#include <openssl/md5.h>
c2f6a13d LMB	29	#include "fio.h"
	30	#include "../optgroup.h"
	31
9c1c1a8d JA	32	/*
	33	* Silence OpenSSL 3.0 deprecated function warnings
	34	*/
	35	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
c2f6a13d	36
09fd2966 LMB	37	enum {
	38	FIO_HTTP_WEBDAV = 0,
	39	FIO_HTTP_S3 = 1,
	40	FIO_HTTP_SWIFT = 2,
	41
	42	FIO_HTTPS_OFF = 0,
	43	FIO_HTTPS_ON = 1,
	44	FIO_HTTPS_INSECURE = 2,
	45	};
	46
c2f6a13d LMB	47	struct http_data {
	48	CURL *curl;
	49	};
	50
	51	struct http_options {
	52	void *pad;
09fd2966	53	unsigned int https;
c2f6a13d LMB	54	char *host;
	55	char *user;
	56	char *pass;
	57	char *s3_key;
	58	char *s3_keyid;
	59	char *s3_region;
09fd2966	60	char *swift_auth_token;
c2f6a13d	61	int verbose;
09fd2966	62	unsigned int mode;
c2f6a13d LMB	63	};
	64
	65	struct http_curl_stream {
	66	char *buf;
	67	size_t pos;
	68	size_t max;
	69	};
	70
	71	static struct fio_option options[] = {
	72	{
	73	.name = "https",
	74	.lname = "https",
09fd2966	75	.type = FIO_OPT_STR,
c2f6a13d LMB	76	.help = "Enable https",
c2f6a13d LMB	77	.off1 = offsetof(struct http_options, https),
09fd2966 LMB	78	.def = "off",
	79	.posval = {
	80	{ .ival = "off",
	81	.oval = FIO_HTTPS_OFF,
	82	.help = "No HTTPS",
	83	},
	84	{ .ival = "on",
	85	.oval = FIO_HTTPS_ON,
	86	.help = "Enable HTTPS",
	87	},
	88	{ .ival = "insecure",
	89	.oval = FIO_HTTPS_INSECURE,
	90	.help = "Enable HTTPS, disable peer verification",
	91	},
	92	},
c2f6a13d LMB	93	.category = FIO_OPT_C_ENGINE,
	94	.group = FIO_OPT_G_HTTP,
	95	},
	96	{
	97	.name = "http_host",
	98	.lname = "http_host",
	99	.type = FIO_OPT_STR_STORE,
	100	.help = "Hostname (S3 bucket)",
	101	.off1 = offsetof(struct http_options, host),
	102	.def = "localhost",
	103	.category = FIO_OPT_C_ENGINE,
	104	.group = FIO_OPT_G_HTTP,
	105	},
	106	{
	107	.name = "http_user",
	108	.lname = "http_user",
	109	.type = FIO_OPT_STR_STORE,
	110	.help = "HTTP user name",
	111	.off1 = offsetof(struct http_options, user),
	112	.category = FIO_OPT_C_ENGINE,
	113	.group = FIO_OPT_G_HTTP,
	114	},
	115	{
	116	.name = "http_pass",
	117	.lname = "http_pass",
	118	.type = FIO_OPT_STR_STORE,
	119	.help = "HTTP password",
	120	.off1 = offsetof(struct http_options, pass),
	121	.category = FIO_OPT_C_ENGINE,
	122	.group = FIO_OPT_G_HTTP,
	123	},
	124	{
	125	.name = "http_s3_key",
	126	.lname = "S3 secret key",
	127	.type = FIO_OPT_STR_STORE,
	128	.help = "S3 secret key",
	129	.off1 = offsetof(struct http_options, s3_key),
	130	.def = "",
	131	.category = FIO_OPT_C_ENGINE,
	132	.group = FIO_OPT_G_HTTP,
	133	},
	134	{
	135	.name = "http_s3_keyid",
	136	.lname = "S3 key id",
	137	.type = FIO_OPT_STR_STORE,
	138	.help = "S3 key id",
	139	.off1 = offsetof(struct http_options, s3_keyid),
	140	.def = "",
	141	.category = FIO_OPT_C_ENGINE,
	142	.group = FIO_OPT_G_HTTP,
	143	},
09fd2966 LMB	144	{
	145	.name = "http_swift_auth_token",
	146	.lname = "Swift auth token",
	147	.type = FIO_OPT_STR_STORE,
	148	.help = "OpenStack Swift auth token",
	149	.off1 = offsetof(struct http_options, swift_auth_token),
	150	.def = "",
	151	.category = FIO_OPT_C_ENGINE,
	152	.group = FIO_OPT_G_HTTP,
	153	},
c2f6a13d LMB	154	{
	155	.name = "http_s3_region",
	156	.lname = "S3 region",
	157	.type = FIO_OPT_STR_STORE,
	158	.help = "S3 region",
	159	.off1 = offsetof(struct http_options, s3_region),
	160	.def = "us-east-1",
	161	.category = FIO_OPT_C_ENGINE,
	162	.group = FIO_OPT_G_HTTP,
	163	},
	164	{
09fd2966 LMB	165	.name = "http_mode",
	166	.lname = "Request mode to use",
	167	.type = FIO_OPT_STR,
	168	.help = "Whether to use WebDAV, Swift, or S3",
	169	.off1 = offsetof(struct http_options, mode),
	170	.def = "webdav",
	171	.posval = {
	172	{ .ival = "webdav",
	173	.oval = FIO_HTTP_WEBDAV,
	174	.help = "WebDAV server",
	175	},
	176	{ .ival = "s3",
	177	.oval = FIO_HTTP_S3,
	178	.help = "S3 storage backend",
	179	},
	180	{ .ival = "swift",
	181	.oval = FIO_HTTP_SWIFT,
	182	.help = "OpenStack Swift storage",
	183	},
	184	},
c2f6a13d LMB	185	.category = FIO_OPT_C_ENGINE,
	186	.group = FIO_OPT_G_HTTP,
	187	},
	188	{
	189	.name = "http_verbose",
09fd2966	190	.lname = "HTTP verbosity level",
c2f6a13d LMB	191	.type = FIO_OPT_INT,
	192	.help = "increase http engine verbosity",
	193	.off1 = offsetof(struct http_options, verbose),
	194	.def = "0",
	195	.category = FIO_OPT_C_ENGINE,
	196	.group = FIO_OPT_G_HTTP,
	197	},
	198	{
	199	.name = NULL,
	200	},
	201	};
	202
	203	static char _aws_uriencode(const char uri)
	204	{
	205	size_t bufsize = 1024;
	206	char *r = malloc(bufsize);
	207	char c;
	208	int i, n;
	209	const char *hex = "0123456789ABCDEF";
	210
	211	if (!r) {
	212	log_err("malloc failed\n");
	213	return NULL;
	214	}
	215
	216	n = 0;
	217	for (i = 0; (c = uri[i]); i++) {
	218	if (n > bufsize-5) {
	219	log_err("encoding the URL failed\n");
	220	return NULL;
	221	}
	222
	223	if ( (c >= 'A' && c <= 'Z') \|\| (c >= 'a' && c <= 'z')
	224	\|\| (c >= '0' && c <= '9') \|\| c == '_' \|\| c == '-'
	225	\|\| c == '~' \|\| c == '.' \|\| c == '/')
	226	r[n++] = c;
	227	else {
	228	r[n++] = '%';
	229	r[n++] = hex[(c >> 4 ) & 0xF];
	230	r[n++] = hex[c & 0xF];
	231	}
	232	}
	233	r[n++] = 0;
	234	return r;
	235	}
	236
	237	static char _conv_hex(const unsigned char p, size_t len)
	238	{
	239	char *r;
	240	int i,n;
	241	const char *hex = "0123456789abcdef";
	242	r = malloc(len * 2 + 1);
	243	n = 0;
	244	for (i = 0; i < len; i++) {
	245	r[n++] = hex[(p[i] >> 4 ) & 0xF];
	246	r[n++] = hex[p[i] & 0xF];
	247	}
	248	r[n] = 0;
	249
	250	return r;
	251	}
	252
	253	static char _gen_hex_sha256(const char p, size_t len)
	254	{
255	unsigned char hash[SHA256_DIGEST_LENGTH];
256
257	SHA256((unsigned char*)p, len, hash);
258	return _conv_hex(hash, SHA256_DIGEST_LENGTH);
259	}
260
09fd2966 LMB	261	static char _gen_hex_md5(const char p, size_t len)
	262	{
	263	unsigned char hash[MD5_DIGEST_LENGTH];
	264
	265	MD5((unsigned char*)p, len, hash);
	266	return _conv_hex(hash, MD5_DIGEST_LENGTH);
	267	}
	268
c2f6a13d	269	static void _hmac(unsigned char md, void key, int key_len, char *data) {
b61a5f46 DD	270	#ifndef CONFIG_HAVE_OPAQUE_HMAC_CTX
	271	HMAC_CTX _ctx;
	272	#endif
c2f6a13d LMB	273	HMAC_CTX *ctx;
	274	unsigned int hmac_len;
	275
b61a5f46	276	#ifdef CONFIG_HAVE_OPAQUE_HMAC_CTX
c2f6a13d	277	ctx = HMAC_CTX_new();
b61a5f46 DD	278	#else
b61a5f46 DD	279	ctx = &_ctx;
e8aaa776 JA	280	/* work-around crash in certain versions of libssl */
e8aaa776 JA	281	HMAC_CTX_init(ctx);
b61a5f46	282	#endif
c2f6a13d LMB	283	HMAC_Init_ex(ctx, key, key_len, EVP_sha256(), NULL);
	284	HMAC_Update(ctx, (unsigned char*)data, strlen(data));
	285	HMAC_Final(ctx, md, &hmac_len);
b61a5f46	286	#ifdef CONFIG_HAVE_OPAQUE_HMAC_CTX
c2f6a13d	287	HMAC_CTX_free(ctx);
b61a5f46 DD	288	#else
	289	HMAC_CTX_cleanup(ctx);
	290	#endif
c2f6a13d LMB	291	}
	292
	293	static int _curl_trace(CURL *handle, curl_infotype type,
	294	char *data, size_t size,
	295	void *userp)
	296	{
	297	const char *text;
	298	(void)handle; /* prevent compiler warning */
	299	(void)userp;
	300
	301	switch (type) {
	302	case CURLINFO_TEXT:
24010223	303	fprintf(stderr, "== Info: %s", data);
87933e32	304	fio_fallthrough;
c2f6a13d LMB	305	default:
	306	case CURLINFO_SSL_DATA_OUT:
	307	case CURLINFO_SSL_DATA_IN:
	308	return 0;
	309
	310	case CURLINFO_HEADER_OUT:
	311	text = "=> Send header";
	312	break;
	313	case CURLINFO_DATA_OUT:
	314	text = "=> Send data";
	315	break;
	316	case CURLINFO_HEADER_IN:
	317	text = "<= Recv header";
	318	break;
	319	case CURLINFO_DATA_IN:
	320	text = "<= Recv data";
	321	break;
	322	}
	323
	324	log_info("%s: %s", text, data);
	325	return 0;
	326	}
	327
	328	/* https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html
	329	* https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html#signing-request-intro
	330	*/
	331	static void _add_aws_auth_header(CURL curl, struct curl_slist slist, struct http_options *o,
	332	int op, const char uri, char buf, size_t len)
	333	{
	334	char date_short[16];
	335	char date_iso[32];
	336	char method[8];
	337	char dkey[128];
	338	char creq[512];
	339	char sts[256];
	340	char s[512];
	341	char *uri_encoded = NULL;
	342	char *dsha = NULL;
	343	char *csha = NULL;
	344	char *signature = NULL;
	345	const char *service = "s3";
	346	const char *aws = "aws4_request";
	347	unsigned char md[SHA256_DIGEST_LENGTH];
	348
	349	time_t t = time(NULL);
	350	struct tm *gtm = gmtime(&t);
	351
	352	strftime (date_short, sizeof(date_short), "%Y%m%d", gtm);
	353	strftime (date_iso, sizeof(date_iso), "%Y%m%dT%H%M%SZ", gtm);
	354	uri_encoded = _aws_uriencode(uri);
	355
	356	if (op == DDIR_WRITE) {
	357	dsha = _gen_hex_sha256(buf, len);
	358	sprintf(method, "PUT");
	359	} else {
	360	/* DDIR_READ && DDIR_TRIM supply an empty body */
	361	if (op == DDIR_READ)
	362	sprintf(method, "GET");
	363	else
	364	sprintf(method, "DELETE");
	365	dsha = _gen_hex_sha256("", 0);
	366	}
	367
	368	/* Create the canonical request first */
369	snprintf(creq, sizeof(creq),
370	"%s\n"
371	"%s\n"
372	"\n"
373	"host:%s\n"
374	"x-amz-content-sha256:%s\n"
375	"x-amz-date:%s\n"
376	"\n"
377	"host;x-amz-content-sha256;x-amz-date\n"
378	"%s"
379	, method
380	, uri_encoded, o->host, dsha, date_iso, dsha);
381
382	csha = _gen_hex_sha256(creq, strlen(creq));
383	snprintf(sts, sizeof(sts), "AWS4-HMAC-SHA256\n%s\n%s/%s/%s/%s\n%s",
384	date_iso, date_short, o->s3_region, service, aws, csha);
385
386	snprintf((char *)dkey, sizeof(dkey), "AWS4%s", o->s3_key);
387	_hmac(md, dkey, strlen(dkey), date_short);
388	_hmac(md, md, SHA256_DIGEST_LENGTH, o->s3_region);
389	_hmac(md, md, SHA256_DIGEST_LENGTH, (char*) service);
390	_hmac(md, md, SHA256_DIGEST_LENGTH, (char*) aws);
391	_hmac(md, md, SHA256_DIGEST_LENGTH, sts);
392
393	signature = _conv_hex(md, SHA256_DIGEST_LENGTH);
394
fc002f14	395	/* Suppress automatic Accept: header */
c2f6a13d LMB	396	slist = curl_slist_append(slist, "Accept:");
	397
	398	snprintf(s, sizeof(s), "x-amz-content-sha256: %s", dsha);
	399	slist = curl_slist_append(slist, s);
	400
	401	snprintf(s, sizeof(s), "x-amz-date: %s", date_iso);
	402	slist = curl_slist_append(slist, s);
	403
	404	snprintf(s, sizeof(s), "Authorization: AWS4-HMAC-SHA256 Credential=%s/%s/%s/s3/aws4_request,"
	405	"SignedHeaders=host;x-amz-content-sha256;x-amz-date,Signature=%s",
	406	o->s3_keyid, date_short, o->s3_region, signature);
	407	slist = curl_slist_append(slist, s);
	408
	409	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
	410
	411	free(uri_encoded);
	412	free(csha);
	413	free(dsha);
	414	free(signature);
	415	}
	416
09fd2966 LMB	417	static void _add_swift_header(CURL curl, struct curl_slist slist, struct http_options *o,
	418	int op, const char uri, char buf, size_t len)
	419	{
	420	char *dsha = NULL;
	421	char s[512];
	422
	423	if (op == DDIR_WRITE) {
	424	dsha = _gen_hex_md5(buf, len);
	425	}
fc002f14	426	/* Suppress automatic Accept: header */
09fd2966 LMB	427	slist = curl_slist_append(slist, "Accept:");
	428
	429	snprintf(s, sizeof(s), "etag: %s", dsha);
	430	slist = curl_slist_append(slist, s);
	431
	432	snprintf(s, sizeof(s), "x-auth-token: %s", o->swift_auth_token);
	433	slist = curl_slist_append(slist, s);
	434
	435	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
	436
	437	free(dsha);
	438	}
	439
c2f6a13d LMB	440	static void fio_http_cleanup(struct thread_data *td)
	441	{
	442	struct http_data *http = td->io_ops_data;
	443
	444	if (http) {
	445	curl_easy_cleanup(http->curl);
	446	free(http);
	447	}
	448	}
	449
	450	static size_t _http_read(void ptr, size_t size, size_t nmemb, void stream)
	451	{
	452	struct http_curl_stream *state = stream;
	453	size_t len = size * nmemb;
	454	/* We're retrieving; nothing is supposed to be read locally */
	455	if (!stream)
	456	return 0;
	457	if (len+state->pos > state->max)
	458	len = state->max - state->pos;
	459	memcpy(ptr, &state->buf[state->pos], len);
	460	state->pos += len;
	461	return len;
	462	}
	463
	464	static size_t _http_write(void ptr, size_t size, size_t nmemb, void stream)
	465	{
	466	struct http_curl_stream *state = stream;
	467	/* We're just discarding the returned body after a PUT */
	468	if (!stream)
	469	return nmemb;
	470	if (size != 1)
	471	return CURLE_WRITE_ERROR;
	472	if (nmemb + state->pos > state->max)
	473	return CURLE_WRITE_ERROR;
	474	memcpy(&state->buf[state->pos], ptr, nmemb);
	475	state->pos += nmemb;
	476	return nmemb;
	477	}
	478
	479	static int _http_seek(void *stream, curl_off_t offset, int origin)
	480	{
	481	struct http_curl_stream *state = stream;
	482	if (offset < state->max && origin == SEEK_SET) {
	483	state->pos = offset;
	484	return CURL_SEEKFUNC_OK;
	485	} else
	486	return CURL_SEEKFUNC_FAIL;
	487	}
	488
	489	static enum fio_q_status fio_http_queue(struct thread_data *td,
	490	struct io_u *io_u)
	491	{
	492	struct http_data *http = td->io_ops_data;
	493	struct http_options *o = td->eo;
	494	struct http_curl_stream _curl_stream;
	495	struct curl_slist *slist = NULL;
	496	char object[512];
	497	char url[1024];
	498	long status;
	499	CURLcode res;
	500	int r = -1;
	501
	502	fio_ro_check(td, io_u);
	503	memset(&_curl_stream, 0, sizeof(_curl_stream));
09fd2966 LMB	504	snprintf(object, sizeof(object), "%s_%llu_%llu", td->files[0]->file_name,
	505	io_u->offset, io_u->xfer_buflen);
	506	if (o->https == FIO_HTTPS_OFF)
	507	snprintf(url, sizeof(url), "http://%s%s", o->host, object);
	508	else
	509	snprintf(url, sizeof(url), "https://%s%s", o->host, object);
c2f6a13d LMB	510	curl_easy_setopt(http->curl, CURLOPT_URL, url);
	511	_curl_stream.buf = io_u->xfer_buf;
	512	_curl_stream.max = io_u->xfer_buflen;
	513	curl_easy_setopt(http->curl, CURLOPT_SEEKDATA, &_curl_stream);
	514	curl_easy_setopt(http->curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)io_u->xfer_buflen);
	515
09fd2966	516	if (o->mode == FIO_HTTP_S3)
c2f6a13d LMB	517	_add_aws_auth_header(http->curl, slist, o, io_u->ddir, object,
c2f6a13d LMB	518	io_u->xfer_buf, io_u->xfer_buflen);
09fd2966 LMB	519	else if (o->mode == FIO_HTTP_SWIFT)
	520	_add_swift_header(http->curl, slist, o, io_u->ddir, object,
	521	io_u->xfer_buf, io_u->xfer_buflen);
c2f6a13d LMB	522
	523	if (io_u->ddir == DDIR_WRITE) {
	524	curl_easy_setopt(http->curl, CURLOPT_READDATA, &_curl_stream);
	525	curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, NULL);
	526	curl_easy_setopt(http->curl, CURLOPT_UPLOAD, 1L);
	527	res = curl_easy_perform(http->curl);
	528	if (res == CURLE_OK) {
	529	curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
	530	if (status == 100 \|\| (status >= 200 && status <= 204))
	531	goto out;
	532	log_err("DDIR_WRITE failed with HTTP status code %ld\n", status);
c2f6a13d	533	}
4a4c21bf	534	goto err;
c2f6a13d LMB	535	} else if (io_u->ddir == DDIR_READ) {
	536	curl_easy_setopt(http->curl, CURLOPT_READDATA, NULL);
	537	curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, &_curl_stream);
	538	curl_easy_setopt(http->curl, CURLOPT_HTTPGET, 1L);
	539	res = curl_easy_perform(http->curl);
	540	if (res == CURLE_OK) {
	541	curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
	542	if (status == 200)
	543	goto out;
	544	else if (status == 404) {
	545	/* Object doesn't exist. Pretend we read
	546	* zeroes */
	547	memset(io_u->xfer_buf, 0, io_u->xfer_buflen);
	548	goto out;
	549	}
	550	log_err("DDIR_READ failed with HTTP status code %ld\n", status);
	551	}
	552	goto err;
	553	} else if (io_u->ddir == DDIR_TRIM) {
	554	curl_easy_setopt(http->curl, CURLOPT_HTTPGET, 1L);
	555	curl_easy_setopt(http->curl, CURLOPT_CUSTOMREQUEST, "DELETE");
bd915a6b	556	curl_easy_setopt(http->curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)0);
c2f6a13d LMB	557	curl_easy_setopt(http->curl, CURLOPT_READDATA, NULL);
	558	curl_easy_setopt(http->curl, CURLOPT_WRITEDATA, NULL);
	559	res = curl_easy_perform(http->curl);
	560	if (res == CURLE_OK) {
	561	curl_easy_getinfo(http->curl, CURLINFO_RESPONSE_CODE, &status);
	562	if (status == 200 \|\| status == 202 \|\| status == 204 \|\| status == 404)
	563	goto out;
	564	log_err("DDIR_TRIM failed with HTTP status code %ld\n", status);
	565	}
	566	goto err;
	567	}
	568
	569	log_err("WARNING: Only DDIR_READ/DDIR_WRITE/DDIR_TRIM are supported!\n");
	570
	571	err:
	572	io_u->error = r;
	573	td_verror(td, io_u->error, "transfer");
	574	out:
	575	curl_slist_free_all(slist);
	576	return FIO_Q_COMPLETED;
	577	}
	578
	579	static struct io_u fio_http_event(struct thread_data td, int event)
	580	{
	581	/* sync IO engine - never any outstanding events */
	582	return NULL;
	583	}
	584
	585	int fio_http_getevents(struct thread_data *td, unsigned int min,
	586	unsigned int max, const struct timespec *t)
	587	{
	588	/* sync IO engine - never any outstanding events */
	589	return 0;
	590	}
	591
	592	static int fio_http_setup(struct thread_data *td)
	593	{
	594	struct http_data *http = NULL;
	595	struct http_options *o = td->eo;
c65f3435	596
c2f6a13d LMB	597	/* allocate engine specific structure to deal with libhttp. */
	598	http = calloc(1, sizeof(*http));
	599	if (!http) {
	600	log_err("calloc failed.\n");
	601	goto cleanup;
	602	}
	603
	604	http->curl = curl_easy_init();
	605	if (o->verbose)
	606	curl_easy_setopt(http->curl, CURLOPT_VERBOSE, 1L);
	607	if (o->verbose > 1)
	608	curl_easy_setopt(http->curl, CURLOPT_DEBUGFUNCTION, &_curl_trace);
	609	curl_easy_setopt(http->curl, CURLOPT_NOPROGRESS, 1L);
	610	curl_easy_setopt(http->curl, CURLOPT_FOLLOWLOCATION, 1L);
	611	curl_easy_setopt(http->curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP\|CURLPROTO_HTTPS);
09fd2966 LMB	612	if (o->https == FIO_HTTPS_INSECURE) {
	613	curl_easy_setopt(http->curl, CURLOPT_SSL_VERIFYPEER, 0L);
	614	curl_easy_setopt(http->curl, CURLOPT_SSL_VERIFYHOST, 0L);
	615	}
c2f6a13d LMB	616	curl_easy_setopt(http->curl, CURLOPT_READFUNCTION, _http_read);
c2f6a13d LMB	617	curl_easy_setopt(http->curl, CURLOPT_WRITEFUNCTION, _http_write);
bd915a6b	618	curl_easy_setopt(http->curl, CURLOPT_SEEKFUNCTION, &_http_seek);
c2f6a13d LMB	619	if (o->user && o->pass) {
	620	curl_easy_setopt(http->curl, CURLOPT_USERNAME, o->user);
	621	curl_easy_setopt(http->curl, CURLOPT_PASSWORD, o->pass);
	622	curl_easy_setopt(http->curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
	623	}
	624
	625	td->io_ops_data = http;
	626
	627	/* Force single process mode. */
	628	td->o.use_thread = 1;
	629
	630	return 0;
	631	cleanup:
	632	fio_http_cleanup(td);
c65f3435	633	return 1;
c2f6a13d LMB	634	}
	635
	636	static int fio_http_open(struct thread_data td, struct fio_file f)
	637	{
	638	return 0;
	639	}
	640	static int fio_http_invalidate(struct thread_data td, struct fio_file f)
	641	{
	642	return 0;
	643	}
	644
5a8a6a03	645	FIO_STATIC struct ioengine_ops ioengine = {
c2f6a13d LMB	646	.name = "http",
c2f6a13d LMB	647	.version = FIO_IOOPS_VERSION,
f32a30d4	648	.flags = FIO_DISKLESSIO \| FIO_SYNCIO,
c2f6a13d LMB	649	.setup = fio_http_setup,
	650	.queue = fio_http_queue,
	651	.getevents = fio_http_getevents,
	652	.event = fio_http_event,
	653	.cleanup = fio_http_cleanup,
	654	.open_file = fio_http_open,
	655	.invalidate = fio_http_invalidate,
	656	.options = options,
	657	.option_struct_size = sizeof(struct http_options),
	658	};
	659
	660	static void fio_init fio_http_register(void)
	661	{
	662	register_ioengine(&ioengine);
	663	}
	664
	665	static void fio_exit fio_http_unregister(void)
	666	{
	667	unregister_ioengine(&ioengine);
	668	}