mirror of https://gitee.com/openkylin/qemu.git
curl: Use bdrv_open options instead of filename
As a bonus, going through the QemuOpts QEMU_OPT_SIZE parser for the readahead option gives us proper error reporting that the previous use of atoi() lacked. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf
parent
16c790926b
commit
8e6d58cd5b
153
block/curl.c
153
block/curl.c
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@ -335,12 +335,9 @@ static void curl_clean_state(CURLState *s)
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s->in_use = 0;
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}
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static int curl_open(BlockDriverState *bs, const char *filename,
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QDict *options, int flags)
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static void curl_parse_filename(const char *filename, QDict *options,
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Error **errp)
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{
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BDRVCURLState *s = bs->opaque;
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CURLState *state = NULL;
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double d;
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#define RA_OPTSTR ":readahead="
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char *file;
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@ -348,19 +345,17 @@ static int curl_open(BlockDriverState *bs, const char *filename,
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const char *ra_val;
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int parse_state = 0;
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static int inited = 0;
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file = g_strdup(filename);
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s->readahead_size = READ_AHEAD_SIZE;
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/* Parse a trailing ":readahead=#:" param, if present. */
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ra = file + strlen(file) - 1;
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while (ra >= file) {
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if (parse_state == 0) {
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if (*ra == ':')
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if (*ra == ':') {
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parse_state++;
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else
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} else {
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break;
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}
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} else if (parse_state == 1) {
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if (*ra > '9' || *ra < '0') {
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char *opt_start = ra - strlen(RA_OPTSTR) + 1;
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@ -369,29 +364,78 @@ static int curl_open(BlockDriverState *bs, const char *filename,
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ra_val = ra + 1;
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ra -= strlen(RA_OPTSTR) - 1;
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*ra = '\0';
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s->readahead_size = atoi(ra_val);
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break;
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} else {
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break;
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qdict_put(options, "readahead", qstring_from_str(ra_val));
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}
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break;
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}
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}
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ra--;
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}
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qdict_put(options, "url", qstring_from_str(file));
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g_free(file);
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}
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static QemuOptsList runtime_opts = {
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.name = "curl",
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.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
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.desc = {
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{
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.name = "url",
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.type = QEMU_OPT_STRING,
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.help = "URL to open",
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},
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{
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.name = "readahead",
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.type = QEMU_OPT_SIZE,
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.help = "Readahead size",
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},
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{ /* end of list */ }
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},
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};
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static int curl_open(BlockDriverState *bs, const char *dummy,
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QDict *options, int flags)
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{
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BDRVCURLState *s = bs->opaque;
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CURLState *state = NULL;
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QemuOpts *opts;
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Error *local_err = NULL;
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const char *file;
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double d;
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static int inited = 0;
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opts = qemu_opts_create_nofail(&runtime_opts);
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qemu_opts_absorb_qdict(opts, options, &local_err);
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if (error_is_set(&local_err)) {
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qerror_report_err(local_err);
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error_free(local_err);
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goto out_noclean;
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}
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s->readahead_size = qemu_opt_get_size(opts, "readahead", READ_AHEAD_SIZE);
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if ((s->readahead_size & 0x1ff) != 0) {
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fprintf(stderr, "HTTP_READAHEAD_SIZE %zd is not a multiple of 512\n",
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s->readahead_size);
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goto out_noclean;
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}
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file = qemu_opt_get(opts, "url");
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if (file == NULL) {
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qerror_report(ERROR_CLASS_GENERIC_ERROR, "curl block driver requires "
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"an 'url' option");
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goto out_noclean;
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}
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if (!inited) {
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curl_global_init(CURL_GLOBAL_ALL);
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inited = 1;
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}
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DPRINTF("CURL: Opening %s\n", file);
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s->url = file;
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s->url = g_strdup(file);
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state = curl_init_state(s);
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if (!state)
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goto out_noclean;
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@ -423,6 +467,7 @@ static int curl_open(BlockDriverState *bs, const char *filename,
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curl_multi_setopt( s->multi, CURLMOPT_SOCKETFUNCTION, curl_sock_cb );
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curl_multi_do(s);
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qemu_opts_del(opts);
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return 0;
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out:
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@ -430,7 +475,8 @@ out:
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curl_easy_cleanup(state->curl);
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state->curl = NULL;
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out_noclean:
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g_free(file);
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g_free(s->url);
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qemu_opts_del(opts);
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return -EINVAL;
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}
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@ -568,63 +614,68 @@ static int64_t curl_getlength(BlockDriverState *bs)
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}
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static BlockDriver bdrv_http = {
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.format_name = "http",
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.protocol_name = "http",
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.format_name = "http",
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.protocol_name = "http",
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_parse_filename = curl_parse_filename,
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.bdrv_aio_readv = curl_aio_readv,
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.bdrv_aio_readv = curl_aio_readv,
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};
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static BlockDriver bdrv_https = {
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.format_name = "https",
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.protocol_name = "https",
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.format_name = "https",
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.protocol_name = "https",
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_parse_filename = curl_parse_filename,
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.bdrv_aio_readv = curl_aio_readv,
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.bdrv_aio_readv = curl_aio_readv,
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};
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static BlockDriver bdrv_ftp = {
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.format_name = "ftp",
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.protocol_name = "ftp",
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.format_name = "ftp",
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.protocol_name = "ftp",
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_parse_filename = curl_parse_filename,
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.bdrv_aio_readv = curl_aio_readv,
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.bdrv_aio_readv = curl_aio_readv,
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};
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static BlockDriver bdrv_ftps = {
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.format_name = "ftps",
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.protocol_name = "ftps",
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.format_name = "ftps",
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.protocol_name = "ftps",
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_parse_filename = curl_parse_filename,
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.bdrv_aio_readv = curl_aio_readv,
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.bdrv_aio_readv = curl_aio_readv,
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};
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static BlockDriver bdrv_tftp = {
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.format_name = "tftp",
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.protocol_name = "tftp",
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.format_name = "tftp",
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.protocol_name = "tftp",
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.instance_size = sizeof(BDRVCURLState),
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.bdrv_parse_filename = curl_parse_filename,
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.bdrv_file_open = curl_open,
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.bdrv_close = curl_close,
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.bdrv_getlength = curl_getlength,
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.bdrv_aio_readv = curl_aio_readv,
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.bdrv_aio_readv = curl_aio_readv,
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};
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static void curl_block_init(void)
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