--- /dev/null
+/*
+ * 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 "qemu/error-report.h"
+#include "block/block_int.h"
+#include "qapi/qmp/qbool.h"
+#include "qapi/qmp/qstring.h"
+#include <curl/curl.h>
+
+// #define DEBUG_CURL
+// #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
+#define HAVE_SOCKET_ACTION
+#endif
+
+#ifndef HAVE_SOCKET_ACTION
+/* If curl_multi_socket_action isn't available, define it statically here in
+ * terms of curl_multi_socket. Note that ev_bitmask will be ignored, which is
+ * less efficient but still safe. */
+static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,
+ curl_socket_t sockfd,
+ int ev_bitmask,
+ int *running_handles)
+{
+ return curl_multi_socket(multi_handle, sockfd, running_handles);
+}
+#define curl_multi_socket_action __curl_multi_socket_action
+#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_DEFAULT (256 * 1024)
+#define CURL_TIMEOUT_DEFAULT 5
+#define CURL_TIMEOUT_MAX 10000
+
+#define FIND_RET_NONE 0
+#define FIND_RET_OK 1
+#define FIND_RET_WAIT 2
+
+#define CURL_BLOCK_OPT_URL "url"
+#define CURL_BLOCK_OPT_READAHEAD "readahead"
+#define CURL_BLOCK_OPT_SSLVERIFY "sslverify"
+#define CURL_BLOCK_OPT_TIMEOUT "timeout"
+#define CURL_BLOCK_OPT_COOKIE "cookie"
+
+struct BDRVCURLState;
+
+typedef struct CURLAIOCB {
+ BlockAIOCB 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;
+ curl_socket_t sock_fd;
+ 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 sslverify;
+ uint64_t timeout;
+ char *cookie;
+ bool accept_range;
+ AioContext *aio_context;
+} BDRVCURLState;
+
+static void curl_clean_state(CURLState *s);
+static void curl_multi_do(void *arg);
+static void curl_multi_read(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 *userp, void *sp)
+{
+ BDRVCURLState *s;
+ CURLState *state = NULL;
+ curl_easy_getinfo(curl, CURLINFO_PRIVATE, (char **)&state);
+ state->sock_fd = fd;
+ s = state->s;
+
+ DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
+ switch (action) {
+ case CURL_POLL_IN:
+ aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
+ NULL, state);
+ break;
+ case CURL_POLL_OUT:
+ aio_set_fd_handler(s->aio_context, fd, NULL, curl_multi_do, state);
+ break;
+ case CURL_POLL_INOUT:
+ aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
+ curl_multi_do, state);
+ break;
+ case CURL_POLL_REMOVE:
+ aio_set_fd_handler(s->aio_context, 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);
+
+ if (!s || !s->orig_buf)
+ return 0;
+
+ if (s->buf_off >= s->buf_len) {
+ /* buffer full, read nothing */
+ return 0;
+ }
+ realsize = MIN(realsize, s->buf_len - s->buf_off);
+ memcpy(s->orig_buf + s->buf_off, ptr, realsize);
+ s->buf_off += realsize;
+
+ for(i=0; i<CURL_NUM_ACB; i++) {
+ CURLAIOCB *acb = s->acb[i];
+
+ if (!acb)
+ continue;
+
+ 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_unref(acb);
+ s->acb[i] = NULL;
+ }
+ }
+
+ return realsize;
+}
+
+static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
+ CURLAIOCB *acb)
+{
+ int i;
+ 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);
+
+ return FIND_RET_OK;
+ }
+
+ // Wait for unfinished chunks
+ if (state->in_use &&
+ (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_check_completion(BDRVCURLState *s)
+{
+ int msgs_in_queue;
+
+ /* Try to find done transfers, so we can free the easy
+ * handle again. */
+ for (;;) {
+ CURLMsg *msg;
+ msg = curl_multi_info_read(s->multi, &msgs_in_queue);
+
+ /* Quit when there are no more completions */
+ if (!msg)
+ break;
+
+ if (msg->msg == 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;
+ static int errcount = 100;
+
+ /* Don't lose the original error message from curl, since
+ * it contains extra data.
+ */
+ if (errcount > 0) {
+ error_report("curl: %s", state->errmsg);
+ if (--errcount == 0) {
+ error_report("curl: further errors suppressed");
+ }
+ }
+
+ for (i = 0; i < CURL_NUM_ACB; i++) {
+ CURLAIOCB *acb = state->acb[i];
+
+ if (acb == NULL) {
+ continue;
+ }
+
+ acb->common.cb(acb->common.opaque, -EPROTO);
+ qemu_aio_unref(acb);
+ state->acb[i] = NULL;
+ }
+ }
+
+ curl_clean_state(state);
+ break;
+ }
+ }
+}
+
+static void curl_multi_do(void *arg)
+{
+ CURLState *s = (CURLState *)arg;
+ int running;
+ int r;
+
+ if (!s->s->multi) {
+ return;
+ }
+
+ do {
+ r = curl_multi_socket_action(s->s->multi, s->sock_fd, 0, &running);
+ } while(r == CURLM_CALL_MULTI_PERFORM);
+
+}
+
+static void curl_multi_read(void *arg)
+{
+ CURLState *s = (CURLState *)arg;
+
+ curl_multi_do(arg);
+ curl_multi_check_completion(s->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_check_completion(s);
+#else
+ abort();
+#endif
+}
+
+static CURLState *curl_init_state(BlockDriverState *bs, 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) {
+ aio_poll(bdrv_get_aio_context(bs), true);
+ }
+ } while(!state);
+
+ if (!state->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_SSL_VERIFYPEER,
+ (long) s->sslverify);
+ if (s->cookie) {
+ curl_easy_setopt(state->curl, CURLOPT_COOKIE, s->cookie);
+ }
+ curl_easy_setopt(state->curl, CURLOPT_TIMEOUT, (long)s->timeout);
+ 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
+ }
+
+ 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)
+{
+ qdict_put(options, CURL_BLOCK_OPT_URL, qstring_from_str(filename));
+}
+
+static void curl_detach_aio_context(BlockDriverState *bs)
+{
+ BDRVCURLState *s = bs->opaque;
+ int i;
+
+ 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;
+ }
+ g_free(s->states[i].orig_buf);
+ s->states[i].orig_buf = NULL;
+ }
+ if (s->multi) {
+ curl_multi_cleanup(s->multi);
+ s->multi = NULL;
+ }
+
+ timer_del(&s->timer);
+}
+
+static void curl_attach_aio_context(BlockDriverState *bs,
+ AioContext *new_context)
+{
+ BDRVCURLState *s = bs->opaque;
+
+ aio_timer_init(new_context, &s->timer,
+ QEMU_CLOCK_REALTIME, SCALE_NS,
+ curl_multi_timeout_do, s);
+
+ assert(!s->multi);
+ s->multi = curl_multi_init();
+ s->aio_context = new_context;
+ 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
+}
+
+static QemuOptsList runtime_opts = {
+ .name = "curl",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
+ .desc = {
+ {
+ .name = CURL_BLOCK_OPT_URL,
+ .type = QEMU_OPT_STRING,
+ .help = "URL to open",
+ },
+ {
+ .name = CURL_BLOCK_OPT_READAHEAD,
+ .type = QEMU_OPT_SIZE,
+ .help = "Readahead size",
+ },
+ {
+ .name = CURL_BLOCK_OPT_SSLVERIFY,
+ .type = QEMU_OPT_BOOL,
+ .help = "Verify SSL certificate"
+ },
+ {
+ .name = CURL_BLOCK_OPT_TIMEOUT,
+ .type = QEMU_OPT_NUMBER,
+ .help = "Curl timeout"
+ },
+ {
+ .name = CURL_BLOCK_OPT_COOKIE,
+ .type = QEMU_OPT_STRING,
+ .help = "Pass the cookie or list of cookies with each request"
+ },
+ { /* 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;
+ const char *cookie;
+ double d;
+
+ static int inited = 0;
+
+ if (flags & BDRV_O_RDWR) {
+ error_setg(errp, "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) {
+ error_propagate(errp, local_err);
+ goto out_noclean;
+ }
+
+ s->readahead_size = qemu_opt_get_size(opts, CURL_BLOCK_OPT_READAHEAD,
+ READ_AHEAD_DEFAULT);
+ if ((s->readahead_size & 0x1ff) != 0) {
+ error_setg(errp, "HTTP_READAHEAD_SIZE %zd is not a multiple of 512",
+ s->readahead_size);
+ goto out_noclean;
+ }
+
+ s->timeout = qemu_opt_get_number(opts, CURL_BLOCK_OPT_TIMEOUT,
+ CURL_TIMEOUT_DEFAULT);
+ if (s->timeout > CURL_TIMEOUT_MAX) {
+ error_setg(errp, "timeout parameter is too large or negative");
+ goto out_noclean;
+ }
+
+ s->sslverify = qemu_opt_get_bool(opts, CURL_BLOCK_OPT_SSLVERIFY, true);
+
+ cookie = qemu_opt_get(opts, CURL_BLOCK_OPT_COOKIE);
+ s->cookie = g_strdup(cookie);
+
+ file = qemu_opt_get(opts, CURL_BLOCK_OPT_URL);
+ if (file == NULL) {
+ error_setg(errp, "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->aio_context = bdrv_get_aio_context(bs);
+ s->url = g_strdup(file);
+ state = curl_init_state(bs, 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;
+
+ curl_attach_aio_context(bs, bdrv_get_aio_context(bs));
+
+ qemu_opts_del(opts);
+ return 0;
+
+out:
+ error_setg(errp, "CURL: Error opening file: %s", state->errmsg);
+ curl_easy_cleanup(state->curl);
+ state->curl = NULL;
+out_noclean:
+ g_free(s->cookie);
+ g_free(s->url);
+ qemu_opts_del(opts);
+ return -EINVAL;
+}
+
+static const AIOCBInfo curl_aiocb_info = {
+ .aiocb_size = sizeof(CURLAIOCB),
+};
+
+
+static void curl_readv_bh_cb(void *p)
+{
+ CURLState *state;
+ int running;
+
+ 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_unref(acb);
+ // fall through
+ case FIND_RET_WAIT:
+ return;
+ default:
+ break;
+ }
+
+ // No cache found, so let's start a new request
+ state = curl_init_state(acb->common.bs, s);
+ if (!state) {
+ acb->common.cb(acb->common.opaque, -EIO);
+ qemu_aio_unref(acb);
+ return;
+ }
+
+ acb->start = 0;
+ acb->end = (acb->nb_sectors * SECTOR_SIZE);
+
+ state->buf_off = 0;
+ 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_try_malloc(state->buf_len);
+ if (state->buf_len && state->orig_buf == NULL) {
+ curl_clean_state(state);
+ acb->common.cb(acb->common.opaque, -ENOMEM);
+ qemu_aio_unref(acb);
+ return;
+ }
+ 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);
+
+ /* Tell curl it needs to kick things off */
+ curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);
+}
+
+static BlockAIOCB *curl_aio_readv(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockCompletionFunc *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 = aio_bh_new(bdrv_get_aio_context(bs), curl_readv_bh_cb, acb);
+ qemu_bh_schedule(acb->bh);
+ return &acb->common;
+}
+
+static void curl_close(BlockDriverState *bs)
+{
+ BDRVCURLState *s = bs->opaque;
+
+ DPRINTF("CURL: Close\n");
+ curl_detach_aio_context(bs);
+
+ g_free(s->cookie);
+ 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,
+
+ .bdrv_detach_aio_context = curl_detach_aio_context,
+ .bdrv_attach_aio_context = curl_attach_aio_context,
+};
+
+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,
+
+ .bdrv_detach_aio_context = curl_detach_aio_context,
+ .bdrv_attach_aio_context = curl_attach_aio_context,
+};
+
+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,
+
+ .bdrv_detach_aio_context = curl_detach_aio_context,
+ .bdrv_attach_aio_context = curl_attach_aio_context,
+};
+
+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,
+
+ .bdrv_detach_aio_context = curl_detach_aio_context,
+ .bdrv_attach_aio_context = curl_attach_aio_context,
+};
+
+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,
+
+ .bdrv_detach_aio_context = curl_detach_aio_context,
+ .bdrv_attach_aio_context = curl_attach_aio_context,
+};
+
+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);
Code Review / kvmfornfv.git / blobdiff