error_is_set(&var) is the same as var != NULL, but it takes whole-program analysis to figure that out. Unnecessarily hard for optimizers, static checkers, and human readers. Dumb it down to obvious. Gets rid of several dozen Coverity false positives. Note that the obvious form is already used in many places. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
743 lines
20 KiB
C
743 lines
20 KiB
C
/*
|
|
* QEMU Block driver for CURL images
|
|
*
|
|
* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "qemu-common.h"
|
|
#include "block/block_int.h"
|
|
#include <curl/curl.h>
|
|
|
|
// #define DEBUG
|
|
// #define DEBUG_VERBOSE
|
|
|
|
#ifdef DEBUG_CURL
|
|
#define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) do { } while (0)
|
|
#endif
|
|
|
|
#if LIBCURL_VERSION_NUM >= 0x071000
|
|
/* The multi interface timer callback was introduced in 7.16.0 */
|
|
#define NEED_CURL_TIMER_CALLBACK
|
|
#endif
|
|
|
|
#define PROTOCOLS (CURLPROTO_HTTP | CURLPROTO_HTTPS | \
|
|
CURLPROTO_FTP | CURLPROTO_FTPS | \
|
|
CURLPROTO_TFTP)
|
|
|
|
#define CURL_NUM_STATES 8
|
|
#define CURL_NUM_ACB 8
|
|
#define SECTOR_SIZE 512
|
|
#define READ_AHEAD_SIZE (256 * 1024)
|
|
|
|
#define FIND_RET_NONE 0
|
|
#define FIND_RET_OK 1
|
|
#define FIND_RET_WAIT 2
|
|
|
|
struct BDRVCURLState;
|
|
|
|
typedef struct CURLAIOCB {
|
|
BlockDriverAIOCB common;
|
|
QEMUBH *bh;
|
|
QEMUIOVector *qiov;
|
|
|
|
int64_t sector_num;
|
|
int nb_sectors;
|
|
|
|
size_t start;
|
|
size_t end;
|
|
} CURLAIOCB;
|
|
|
|
typedef struct CURLState
|
|
{
|
|
struct BDRVCURLState *s;
|
|
CURLAIOCB *acb[CURL_NUM_ACB];
|
|
CURL *curl;
|
|
char *orig_buf;
|
|
size_t buf_start;
|
|
size_t buf_off;
|
|
size_t buf_len;
|
|
char range[128];
|
|
char errmsg[CURL_ERROR_SIZE];
|
|
char in_use;
|
|
} CURLState;
|
|
|
|
typedef struct BDRVCURLState {
|
|
CURLM *multi;
|
|
QEMUTimer timer;
|
|
size_t len;
|
|
CURLState states[CURL_NUM_STATES];
|
|
char *url;
|
|
size_t readahead_size;
|
|
bool accept_range;
|
|
} BDRVCURLState;
|
|
|
|
static void curl_clean_state(CURLState *s);
|
|
static void curl_multi_do(void *arg);
|
|
|
|
#ifdef NEED_CURL_TIMER_CALLBACK
|
|
static int curl_timer_cb(CURLM *multi, long timeout_ms, void *opaque)
|
|
{
|
|
BDRVCURLState *s = opaque;
|
|
|
|
DPRINTF("CURL: timer callback timeout_ms %ld\n", timeout_ms);
|
|
if (timeout_ms == -1) {
|
|
timer_del(&s->timer);
|
|
} else {
|
|
int64_t timeout_ns = (int64_t)timeout_ms * 1000 * 1000;
|
|
timer_mod(&s->timer,
|
|
qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + timeout_ns);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
|
|
void *s, void *sp)
|
|
{
|
|
DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
|
|
switch (action) {
|
|
case CURL_POLL_IN:
|
|
qemu_aio_set_fd_handler(fd, curl_multi_do, NULL, s);
|
|
break;
|
|
case CURL_POLL_OUT:
|
|
qemu_aio_set_fd_handler(fd, NULL, curl_multi_do, s);
|
|
break;
|
|
case CURL_POLL_INOUT:
|
|
qemu_aio_set_fd_handler(fd, curl_multi_do, curl_multi_do, s);
|
|
break;
|
|
case CURL_POLL_REMOVE:
|
|
qemu_aio_set_fd_handler(fd, NULL, NULL, NULL);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static size_t curl_header_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
|
|
{
|
|
BDRVCURLState *s = opaque;
|
|
size_t realsize = size * nmemb;
|
|
const char *accept_line = "Accept-Ranges: bytes";
|
|
|
|
if (realsize >= strlen(accept_line)
|
|
&& strncmp((char *)ptr, accept_line, strlen(accept_line)) == 0) {
|
|
s->accept_range = true;
|
|
}
|
|
|
|
return realsize;
|
|
}
|
|
|
|
static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
|
|
{
|
|
CURLState *s = ((CURLState*)opaque);
|
|
size_t realsize = size * nmemb;
|
|
int i;
|
|
|
|
DPRINTF("CURL: Just reading %zd bytes\n", realsize);
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|
|
|
if (!s || !s->orig_buf)
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|
goto read_end;
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|
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|
memcpy(s->orig_buf + s->buf_off, ptr, realsize);
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|
s->buf_off += realsize;
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|
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|
for(i=0; i<CURL_NUM_ACB; i++) {
|
|
CURLAIOCB *acb = s->acb[i];
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|
|
|
if (!acb)
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|
continue;
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|
|
|
if ((s->buf_off >= acb->end)) {
|
|
qemu_iovec_from_buf(acb->qiov, 0, s->orig_buf + acb->start,
|
|
acb->end - acb->start);
|
|
acb->common.cb(acb->common.opaque, 0);
|
|
qemu_aio_release(acb);
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|
s->acb[i] = NULL;
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|
}
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|
}
|
|
|
|
read_end:
|
|
return realsize;
|
|
}
|
|
|
|
static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
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|
CURLAIOCB *acb)
|
|
{
|
|
int i;
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|
size_t end = start + len;
|
|
|
|
for (i=0; i<CURL_NUM_STATES; i++) {
|
|
CURLState *state = &s->states[i];
|
|
size_t buf_end = (state->buf_start + state->buf_off);
|
|
size_t buf_fend = (state->buf_start + state->buf_len);
|
|
|
|
if (!state->orig_buf)
|
|
continue;
|
|
if (!state->buf_off)
|
|
continue;
|
|
|
|
// Does the existing buffer cover our section?
|
|
if ((start >= state->buf_start) &&
|
|
(start <= buf_end) &&
|
|
(end >= state->buf_start) &&
|
|
(end <= buf_end))
|
|
{
|
|
char *buf = state->orig_buf + (start - state->buf_start);
|
|
|
|
qemu_iovec_from_buf(acb->qiov, 0, buf, len);
|
|
acb->common.cb(acb->common.opaque, 0);
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|
|
|
return FIND_RET_OK;
|
|
}
|
|
|
|
// Wait for unfinished chunks
|
|
if ((start >= state->buf_start) &&
|
|
(start <= buf_fend) &&
|
|
(end >= state->buf_start) &&
|
|
(end <= buf_fend))
|
|
{
|
|
int j;
|
|
|
|
acb->start = start - state->buf_start;
|
|
acb->end = acb->start + len;
|
|
|
|
for (j=0; j<CURL_NUM_ACB; j++) {
|
|
if (!state->acb[j]) {
|
|
state->acb[j] = acb;
|
|
return FIND_RET_WAIT;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return FIND_RET_NONE;
|
|
}
|
|
|
|
static void curl_multi_read(BDRVCURLState *s)
|
|
{
|
|
int msgs_in_queue;
|
|
|
|
/* Try to find done transfers, so we can free the easy
|
|
* handle again. */
|
|
do {
|
|
CURLMsg *msg;
|
|
msg = curl_multi_info_read(s->multi, &msgs_in_queue);
|
|
|
|
if (!msg)
|
|
break;
|
|
if (msg->msg == CURLMSG_NONE)
|
|
break;
|
|
|
|
switch (msg->msg) {
|
|
case CURLMSG_DONE:
|
|
{
|
|
CURLState *state = NULL;
|
|
curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char**)&state);
|
|
|
|
/* ACBs for successful messages get completed in curl_read_cb */
|
|
if (msg->data.result != CURLE_OK) {
|
|
int i;
|
|
for (i = 0; i < CURL_NUM_ACB; i++) {
|
|
CURLAIOCB *acb = state->acb[i];
|
|
|
|
if (acb == NULL) {
|
|
continue;
|
|
}
|
|
|
|
acb->common.cb(acb->common.opaque, -EIO);
|
|
qemu_aio_release(acb);
|
|
state->acb[i] = NULL;
|
|
}
|
|
}
|
|
|
|
curl_clean_state(state);
|
|
break;
|
|
}
|
|
default:
|
|
msgs_in_queue = 0;
|
|
break;
|
|
}
|
|
} while(msgs_in_queue);
|
|
}
|
|
|
|
static void curl_multi_do(void *arg)
|
|
{
|
|
BDRVCURLState *s = (BDRVCURLState *)arg;
|
|
int running;
|
|
int r;
|
|
|
|
if (!s->multi) {
|
|
return;
|
|
}
|
|
|
|
do {
|
|
r = curl_multi_socket_all(s->multi, &running);
|
|
} while(r == CURLM_CALL_MULTI_PERFORM);
|
|
|
|
curl_multi_read(s);
|
|
}
|
|
|
|
static void curl_multi_timeout_do(void *arg)
|
|
{
|
|
#ifdef NEED_CURL_TIMER_CALLBACK
|
|
BDRVCURLState *s = (BDRVCURLState *)arg;
|
|
int running;
|
|
|
|
if (!s->multi) {
|
|
return;
|
|
}
|
|
|
|
curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);
|
|
|
|
curl_multi_read(s);
|
|
#else
|
|
abort();
|
|
#endif
|
|
}
|
|
|
|
static CURLState *curl_init_state(BDRVCURLState *s)
|
|
{
|
|
CURLState *state = NULL;
|
|
int i, j;
|
|
|
|
do {
|
|
for (i=0; i<CURL_NUM_STATES; i++) {
|
|
for (j=0; j<CURL_NUM_ACB; j++)
|
|
if (s->states[i].acb[j])
|
|
continue;
|
|
if (s->states[i].in_use)
|
|
continue;
|
|
|
|
state = &s->states[i];
|
|
state->in_use = 1;
|
|
break;
|
|
}
|
|
if (!state) {
|
|
g_usleep(100);
|
|
curl_multi_do(s);
|
|
}
|
|
} while(!state);
|
|
|
|
if (state->curl)
|
|
goto has_curl;
|
|
|
|
state->curl = curl_easy_init();
|
|
if (!state->curl)
|
|
return NULL;
|
|
curl_easy_setopt(state->curl, CURLOPT_URL, s->url);
|
|
curl_easy_setopt(state->curl, CURLOPT_TIMEOUT, 5);
|
|
curl_easy_setopt(state->curl, CURLOPT_WRITEFUNCTION, (void *)curl_read_cb);
|
|
curl_easy_setopt(state->curl, CURLOPT_WRITEDATA, (void *)state);
|
|
curl_easy_setopt(state->curl, CURLOPT_PRIVATE, (void *)state);
|
|
curl_easy_setopt(state->curl, CURLOPT_AUTOREFERER, 1);
|
|
curl_easy_setopt(state->curl, CURLOPT_FOLLOWLOCATION, 1);
|
|
curl_easy_setopt(state->curl, CURLOPT_NOSIGNAL, 1);
|
|
curl_easy_setopt(state->curl, CURLOPT_ERRORBUFFER, state->errmsg);
|
|
curl_easy_setopt(state->curl, CURLOPT_FAILONERROR, 1);
|
|
|
|
/* Restrict supported protocols to avoid security issues in the more
|
|
* obscure protocols. For example, do not allow POP3/SMTP/IMAP see
|
|
* CVE-2013-0249.
|
|
*
|
|
* Restricting protocols is only supported from 7.19.4 upwards.
|
|
*/
|
|
#if LIBCURL_VERSION_NUM >= 0x071304
|
|
curl_easy_setopt(state->curl, CURLOPT_PROTOCOLS, PROTOCOLS);
|
|
curl_easy_setopt(state->curl, CURLOPT_REDIR_PROTOCOLS, PROTOCOLS);
|
|
#endif
|
|
|
|
#ifdef DEBUG_VERBOSE
|
|
curl_easy_setopt(state->curl, CURLOPT_VERBOSE, 1);
|
|
#endif
|
|
|
|
has_curl:
|
|
|
|
state->s = s;
|
|
|
|
return state;
|
|
}
|
|
|
|
static void curl_clean_state(CURLState *s)
|
|
{
|
|
if (s->s->multi)
|
|
curl_multi_remove_handle(s->s->multi, s->curl);
|
|
s->in_use = 0;
|
|
}
|
|
|
|
static void curl_parse_filename(const char *filename, QDict *options,
|
|
Error **errp)
|
|
{
|
|
|
|
#define RA_OPTSTR ":readahead="
|
|
char *file;
|
|
char *ra;
|
|
const char *ra_val;
|
|
int parse_state = 0;
|
|
|
|
file = g_strdup(filename);
|
|
|
|
/* Parse a trailing ":readahead=#:" param, if present. */
|
|
ra = file + strlen(file) - 1;
|
|
while (ra >= file) {
|
|
if (parse_state == 0) {
|
|
if (*ra == ':') {
|
|
parse_state++;
|
|
} else {
|
|
break;
|
|
}
|
|
} else if (parse_state == 1) {
|
|
if (*ra > '9' || *ra < '0') {
|
|
char *opt_start = ra - strlen(RA_OPTSTR) + 1;
|
|
if (opt_start > file &&
|
|
strncmp(opt_start, RA_OPTSTR, strlen(RA_OPTSTR)) == 0) {
|
|
ra_val = ra + 1;
|
|
ra -= strlen(RA_OPTSTR) - 1;
|
|
*ra = '\0';
|
|
qdict_put(options, "readahead", qstring_from_str(ra_val));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
ra--;
|
|
}
|
|
|
|
qdict_put(options, "url", qstring_from_str(file));
|
|
|
|
g_free(file);
|
|
}
|
|
|
|
static QemuOptsList runtime_opts = {
|
|
.name = "curl",
|
|
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = "url",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "URL to open",
|
|
},
|
|
{
|
|
.name = "readahead",
|
|
.type = QEMU_OPT_SIZE,
|
|
.help = "Readahead size",
|
|
},
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
static int curl_open(BlockDriverState *bs, QDict *options, int flags,
|
|
Error **errp)
|
|
{
|
|
BDRVCURLState *s = bs->opaque;
|
|
CURLState *state = NULL;
|
|
QemuOpts *opts;
|
|
Error *local_err = NULL;
|
|
const char *file;
|
|
double d;
|
|
|
|
static int inited = 0;
|
|
|
|
if (flags & BDRV_O_RDWR) {
|
|
qerror_report(ERROR_CLASS_GENERIC_ERROR,
|
|
"curl block device does not support writes");
|
|
return -EROFS;
|
|
}
|
|
|
|
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
|
|
qemu_opts_absorb_qdict(opts, options, &local_err);
|
|
if (local_err) {
|
|
qerror_report_err(local_err);
|
|
error_free(local_err);
|
|
goto out_noclean;
|
|
}
|
|
|
|
s->readahead_size = qemu_opt_get_size(opts, "readahead", READ_AHEAD_SIZE);
|
|
if ((s->readahead_size & 0x1ff) != 0) {
|
|
fprintf(stderr, "HTTP_READAHEAD_SIZE %zd is not a multiple of 512\n",
|
|
s->readahead_size);
|
|
goto out_noclean;
|
|
}
|
|
|
|
file = qemu_opt_get(opts, "url");
|
|
if (file == NULL) {
|
|
qerror_report(ERROR_CLASS_GENERIC_ERROR, "curl block driver requires "
|
|
"an 'url' option");
|
|
goto out_noclean;
|
|
}
|
|
|
|
if (!inited) {
|
|
curl_global_init(CURL_GLOBAL_ALL);
|
|
inited = 1;
|
|
}
|
|
|
|
DPRINTF("CURL: Opening %s\n", file);
|
|
s->url = g_strdup(file);
|
|
state = curl_init_state(s);
|
|
if (!state)
|
|
goto out_noclean;
|
|
|
|
// Get file size
|
|
|
|
s->accept_range = false;
|
|
curl_easy_setopt(state->curl, CURLOPT_NOBODY, 1);
|
|
curl_easy_setopt(state->curl, CURLOPT_HEADERFUNCTION,
|
|
curl_header_cb);
|
|
curl_easy_setopt(state->curl, CURLOPT_HEADERDATA, s);
|
|
if (curl_easy_perform(state->curl))
|
|
goto out;
|
|
curl_easy_getinfo(state->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d);
|
|
if (d)
|
|
s->len = (size_t)d;
|
|
else if(!s->len)
|
|
goto out;
|
|
if ((!strncasecmp(s->url, "http://", strlen("http://"))
|
|
|| !strncasecmp(s->url, "https://", strlen("https://")))
|
|
&& !s->accept_range) {
|
|
pstrcpy(state->errmsg, CURL_ERROR_SIZE,
|
|
"Server does not support 'range' (byte ranges).");
|
|
goto out;
|
|
}
|
|
DPRINTF("CURL: Size = %zd\n", s->len);
|
|
|
|
curl_clean_state(state);
|
|
curl_easy_cleanup(state->curl);
|
|
state->curl = NULL;
|
|
|
|
aio_timer_init(bdrv_get_aio_context(bs), &s->timer,
|
|
QEMU_CLOCK_REALTIME, SCALE_NS,
|
|
curl_multi_timeout_do, s);
|
|
|
|
// Now we know the file exists and its size, so let's
|
|
// initialize the multi interface!
|
|
|
|
s->multi = curl_multi_init();
|
|
curl_multi_setopt(s->multi, CURLMOPT_SOCKETDATA, s);
|
|
curl_multi_setopt(s->multi, CURLMOPT_SOCKETFUNCTION, curl_sock_cb);
|
|
#ifdef NEED_CURL_TIMER_CALLBACK
|
|
curl_multi_setopt(s->multi, CURLMOPT_TIMERDATA, s);
|
|
curl_multi_setopt(s->multi, CURLMOPT_TIMERFUNCTION, curl_timer_cb);
|
|
#endif
|
|
curl_multi_do(s);
|
|
|
|
qemu_opts_del(opts);
|
|
return 0;
|
|
|
|
out:
|
|
fprintf(stderr, "CURL: Error opening file: %s\n", state->errmsg);
|
|
curl_easy_cleanup(state->curl);
|
|
state->curl = NULL;
|
|
out_noclean:
|
|
g_free(s->url);
|
|
qemu_opts_del(opts);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void curl_aio_cancel(BlockDriverAIOCB *blockacb)
|
|
{
|
|
// Do we have to implement canceling? Seems to work without...
|
|
}
|
|
|
|
static const AIOCBInfo curl_aiocb_info = {
|
|
.aiocb_size = sizeof(CURLAIOCB),
|
|
.cancel = curl_aio_cancel,
|
|
};
|
|
|
|
|
|
static void curl_readv_bh_cb(void *p)
|
|
{
|
|
CURLState *state;
|
|
|
|
CURLAIOCB *acb = p;
|
|
BDRVCURLState *s = acb->common.bs->opaque;
|
|
|
|
qemu_bh_delete(acb->bh);
|
|
acb->bh = NULL;
|
|
|
|
size_t start = acb->sector_num * SECTOR_SIZE;
|
|
size_t end;
|
|
|
|
// In case we have the requested data already (e.g. read-ahead),
|
|
// we can just call the callback and be done.
|
|
switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
|
|
case FIND_RET_OK:
|
|
qemu_aio_release(acb);
|
|
// fall through
|
|
case FIND_RET_WAIT:
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// No cache found, so let's start a new request
|
|
state = curl_init_state(s);
|
|
if (!state) {
|
|
acb->common.cb(acb->common.opaque, -EIO);
|
|
qemu_aio_release(acb);
|
|
return;
|
|
}
|
|
|
|
acb->start = 0;
|
|
acb->end = (acb->nb_sectors * SECTOR_SIZE);
|
|
|
|
state->buf_off = 0;
|
|
if (state->orig_buf)
|
|
g_free(state->orig_buf);
|
|
state->buf_start = start;
|
|
state->buf_len = acb->end + s->readahead_size;
|
|
end = MIN(start + state->buf_len, s->len) - 1;
|
|
state->orig_buf = g_malloc(state->buf_len);
|
|
state->acb[0] = acb;
|
|
|
|
snprintf(state->range, 127, "%zd-%zd", start, end);
|
|
DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
|
|
(acb->nb_sectors * SECTOR_SIZE), start, state->range);
|
|
curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
|
|
|
|
curl_multi_add_handle(s->multi, state->curl);
|
|
curl_multi_do(s);
|
|
|
|
}
|
|
|
|
static BlockDriverAIOCB *curl_aio_readv(BlockDriverState *bs,
|
|
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
|
BlockDriverCompletionFunc *cb, void *opaque)
|
|
{
|
|
CURLAIOCB *acb;
|
|
|
|
acb = qemu_aio_get(&curl_aiocb_info, bs, cb, opaque);
|
|
|
|
acb->qiov = qiov;
|
|
acb->sector_num = sector_num;
|
|
acb->nb_sectors = nb_sectors;
|
|
|
|
acb->bh = qemu_bh_new(curl_readv_bh_cb, acb);
|
|
qemu_bh_schedule(acb->bh);
|
|
return &acb->common;
|
|
}
|
|
|
|
static void curl_close(BlockDriverState *bs)
|
|
{
|
|
BDRVCURLState *s = bs->opaque;
|
|
int i;
|
|
|
|
DPRINTF("CURL: Close\n");
|
|
for (i=0; i<CURL_NUM_STATES; i++) {
|
|
if (s->states[i].in_use)
|
|
curl_clean_state(&s->states[i]);
|
|
if (s->states[i].curl) {
|
|
curl_easy_cleanup(s->states[i].curl);
|
|
s->states[i].curl = NULL;
|
|
}
|
|
if (s->states[i].orig_buf) {
|
|
g_free(s->states[i].orig_buf);
|
|
s->states[i].orig_buf = NULL;
|
|
}
|
|
}
|
|
if (s->multi)
|
|
curl_multi_cleanup(s->multi);
|
|
|
|
timer_del(&s->timer);
|
|
|
|
g_free(s->url);
|
|
}
|
|
|
|
static int64_t curl_getlength(BlockDriverState *bs)
|
|
{
|
|
BDRVCURLState *s = bs->opaque;
|
|
return s->len;
|
|
}
|
|
|
|
static BlockDriver bdrv_http = {
|
|
.format_name = "http",
|
|
.protocol_name = "http",
|
|
|
|
.instance_size = sizeof(BDRVCURLState),
|
|
.bdrv_parse_filename = curl_parse_filename,
|
|
.bdrv_file_open = curl_open,
|
|
.bdrv_close = curl_close,
|
|
.bdrv_getlength = curl_getlength,
|
|
|
|
.bdrv_aio_readv = curl_aio_readv,
|
|
};
|
|
|
|
static BlockDriver bdrv_https = {
|
|
.format_name = "https",
|
|
.protocol_name = "https",
|
|
|
|
.instance_size = sizeof(BDRVCURLState),
|
|
.bdrv_parse_filename = curl_parse_filename,
|
|
.bdrv_file_open = curl_open,
|
|
.bdrv_close = curl_close,
|
|
.bdrv_getlength = curl_getlength,
|
|
|
|
.bdrv_aio_readv = curl_aio_readv,
|
|
};
|
|
|
|
static BlockDriver bdrv_ftp = {
|
|
.format_name = "ftp",
|
|
.protocol_name = "ftp",
|
|
|
|
.instance_size = sizeof(BDRVCURLState),
|
|
.bdrv_parse_filename = curl_parse_filename,
|
|
.bdrv_file_open = curl_open,
|
|
.bdrv_close = curl_close,
|
|
.bdrv_getlength = curl_getlength,
|
|
|
|
.bdrv_aio_readv = curl_aio_readv,
|
|
};
|
|
|
|
static BlockDriver bdrv_ftps = {
|
|
.format_name = "ftps",
|
|
.protocol_name = "ftps",
|
|
|
|
.instance_size = sizeof(BDRVCURLState),
|
|
.bdrv_parse_filename = curl_parse_filename,
|
|
.bdrv_file_open = curl_open,
|
|
.bdrv_close = curl_close,
|
|
.bdrv_getlength = curl_getlength,
|
|
|
|
.bdrv_aio_readv = curl_aio_readv,
|
|
};
|
|
|
|
static BlockDriver bdrv_tftp = {
|
|
.format_name = "tftp",
|
|
.protocol_name = "tftp",
|
|
|
|
.instance_size = sizeof(BDRVCURLState),
|
|
.bdrv_parse_filename = curl_parse_filename,
|
|
.bdrv_file_open = curl_open,
|
|
.bdrv_close = curl_close,
|
|
.bdrv_getlength = curl_getlength,
|
|
|
|
.bdrv_aio_readv = curl_aio_readv,
|
|
};
|
|
|
|
static void curl_block_init(void)
|
|
{
|
|
bdrv_register(&bdrv_http);
|
|
bdrv_register(&bdrv_https);
|
|
bdrv_register(&bdrv_ftp);
|
|
bdrv_register(&bdrv_ftps);
|
|
bdrv_register(&bdrv_tftp);
|
|
}
|
|
|
|
block_init(curl_block_init);
|