nbd/server: use errp instead of LOG
Move to modern errp scheme from just LOGging errors. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20170707152918.23086-4-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
parent
76ff081d91
commit
2fd2c8407e
266
nbd/server.c
266
nbd/server.c
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@ -134,7 +134,7 @@ static void nbd_client_receive_next_request(NBDClient *client);
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/* Send a reply header, including length, but no payload.
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/* Send a reply header, including length, but no payload.
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* Return -errno on error, 0 on success. */
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep_len(QIOChannel *ioc, uint32_t type,
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static int nbd_negotiate_send_rep_len(QIOChannel *ioc, uint32_t type,
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uint32_t opt, uint32_t len)
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uint32_t opt, uint32_t len, Error **errp)
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{
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{
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uint64_t magic;
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uint64_t magic;
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@ -142,23 +142,26 @@ static int nbd_negotiate_send_rep_len(QIOChannel *ioc, uint32_t type,
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type, opt, len);
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type, opt, len);
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magic = cpu_to_be64(NBD_REP_MAGIC);
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magic = cpu_to_be64(NBD_REP_MAGIC);
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if (nbd_write(ioc, &magic, sizeof(magic), NULL) < 0) {
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if (nbd_write(ioc, &magic, sizeof(magic), errp) < 0) {
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LOG("write failed (rep magic)");
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error_prepend(errp, "write failed (rep magic): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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opt = cpu_to_be32(opt);
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opt = cpu_to_be32(opt);
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if (nbd_write(ioc, &opt, sizeof(opt), NULL) < 0) {
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if (nbd_write(ioc, &opt, sizeof(opt), errp) < 0) {
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LOG("write failed (rep opt)");
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error_prepend(errp, "write failed (rep opt): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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type = cpu_to_be32(type);
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type = cpu_to_be32(type);
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if (nbd_write(ioc, &type, sizeof(type), NULL) < 0) {
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if (nbd_write(ioc, &type, sizeof(type), errp) < 0) {
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LOG("write failed (rep type)");
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error_prepend(errp, "write failed (rep type): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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len = cpu_to_be32(len);
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len = cpu_to_be32(len);
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if (nbd_write(ioc, &len, sizeof(len), NULL) < 0) {
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if (nbd_write(ioc, &len, sizeof(len), errp) < 0) {
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LOG("write failed (rep data length)");
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error_prepend(errp, "write failed (rep data length): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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return 0;
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return 0;
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@ -166,16 +169,17 @@ static int nbd_negotiate_send_rep_len(QIOChannel *ioc, uint32_t type,
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/* Send a reply header with default 0 length.
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/* Send a reply header with default 0 length.
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* Return -errno on error, 0 on success. */
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep(QIOChannel *ioc, uint32_t type, uint32_t opt)
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static int nbd_negotiate_send_rep(QIOChannel *ioc, uint32_t type, uint32_t opt,
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Error **errp)
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{
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{
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return nbd_negotiate_send_rep_len(ioc, type, opt, 0);
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return nbd_negotiate_send_rep_len(ioc, type, opt, 0, errp);
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}
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}
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/* Send an error reply.
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/* Send an error reply.
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* Return -errno on error, 0 on success. */
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* Return -errno on error, 0 on success. */
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static int GCC_FMT_ATTR(4, 5)
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static int GCC_FMT_ATTR(5, 6)
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nbd_negotiate_send_rep_err(QIOChannel *ioc, uint32_t type,
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nbd_negotiate_send_rep_err(QIOChannel *ioc, uint32_t type,
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uint32_t opt, const char *fmt, ...)
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uint32_t opt, Error **errp, const char *fmt, ...)
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{
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{
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va_list va;
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va_list va;
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char *msg;
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char *msg;
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@ -188,16 +192,17 @@ nbd_negotiate_send_rep_err(QIOChannel *ioc, uint32_t type,
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len = strlen(msg);
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len = strlen(msg);
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assert(len < 4096);
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assert(len < 4096);
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TRACE("sending error message \"%s\"", msg);
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TRACE("sending error message \"%s\"", msg);
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ret = nbd_negotiate_send_rep_len(ioc, type, opt, len);
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ret = nbd_negotiate_send_rep_len(ioc, type, opt, len, errp);
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if (ret < 0) {
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if (ret < 0) {
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goto out;
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goto out;
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}
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}
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if (nbd_write(ioc, msg, len, NULL) < 0) {
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if (nbd_write(ioc, msg, len, errp) < 0) {
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LOG("write failed (error message)");
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error_prepend(errp, "write failed (error message): ");
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ret = -EIO;
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ret = -EIO;
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} else {
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} else {
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ret = 0;
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ret = 0;
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}
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}
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out:
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out:
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g_free(msg);
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g_free(msg);
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return ret;
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return ret;
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@ -205,7 +210,8 @@ out:
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/* Send a single NBD_REP_SERVER reply to NBD_OPT_LIST, including payload.
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/* Send a single NBD_REP_SERVER reply to NBD_OPT_LIST, including payload.
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* Return -errno on error, 0 on success. */
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_send_rep_list(QIOChannel *ioc, NBDExport *exp)
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static int nbd_negotiate_send_rep_list(QIOChannel *ioc, NBDExport *exp,
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Error **errp)
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{
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{
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size_t name_len, desc_len;
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size_t name_len, desc_len;
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uint32_t len;
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uint32_t len;
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@ -217,53 +223,60 @@ static int nbd_negotiate_send_rep_list(QIOChannel *ioc, NBDExport *exp)
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name_len = strlen(name);
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name_len = strlen(name);
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desc_len = strlen(desc);
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desc_len = strlen(desc);
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len = name_len + desc_len + sizeof(len);
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len = name_len + desc_len + sizeof(len);
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ret = nbd_negotiate_send_rep_len(ioc, NBD_REP_SERVER, NBD_OPT_LIST, len);
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ret = nbd_negotiate_send_rep_len(ioc, NBD_REP_SERVER, NBD_OPT_LIST, len,
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errp);
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if (ret < 0) {
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if (ret < 0) {
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return ret;
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return ret;
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}
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}
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len = cpu_to_be32(name_len);
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len = cpu_to_be32(name_len);
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if (nbd_write(ioc, &len, sizeof(len), NULL) < 0) {
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if (nbd_write(ioc, &len, sizeof(len), errp) < 0) {
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LOG("write failed (name length)");
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error_prepend(errp, "write failed (name length): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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if (nbd_write(ioc, name, name_len, NULL) < 0) {
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LOG("write failed (name buffer)");
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if (nbd_write(ioc, name, name_len, errp) < 0) {
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error_prepend(errp, "write failed (name buffer): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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if (nbd_write(ioc, desc, desc_len, NULL) < 0) {
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LOG("write failed (description buffer)");
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if (nbd_write(ioc, desc, desc_len, errp) < 0) {
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error_prepend(errp, "write failed (description buffer): ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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return 0;
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return 0;
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}
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}
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/* Process the NBD_OPT_LIST command, with a potential series of replies.
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/* Process the NBD_OPT_LIST command, with a potential series of replies.
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* Return -errno on error, 0 on success. */
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* Return -errno on error, 0 on success. */
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static int nbd_negotiate_handle_list(NBDClient *client, uint32_t length)
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static int nbd_negotiate_handle_list(NBDClient *client, uint32_t length,
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Error **errp)
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{
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{
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NBDExport *exp;
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NBDExport *exp;
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if (length) {
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if (length) {
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if (nbd_drop(client->ioc, length, NULL) < 0) {
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if (nbd_drop(client->ioc, length, errp) < 0) {
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return -EIO;
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return -EIO;
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}
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}
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return nbd_negotiate_send_rep_err(client->ioc,
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return nbd_negotiate_send_rep_err(client->ioc,
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NBD_REP_ERR_INVALID, NBD_OPT_LIST,
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NBD_REP_ERR_INVALID, NBD_OPT_LIST,
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errp,
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"OPT_LIST should not have length");
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"OPT_LIST should not have length");
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}
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}
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/* For each export, send a NBD_REP_SERVER reply. */
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/* For each export, send a NBD_REP_SERVER reply. */
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QTAILQ_FOREACH(exp, &exports, next) {
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QTAILQ_FOREACH(exp, &exports, next) {
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if (nbd_negotiate_send_rep_list(client->ioc, exp)) {
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if (nbd_negotiate_send_rep_list(client->ioc, exp, errp)) {
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return -EINVAL;
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return -EINVAL;
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}
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}
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}
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}
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/* Finish with a NBD_REP_ACK. */
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/* Finish with a NBD_REP_ACK. */
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return nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK, NBD_OPT_LIST);
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return nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK, NBD_OPT_LIST, errp);
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}
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}
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static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length)
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static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length,
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Error **errp)
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{
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{
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char name[NBD_MAX_NAME_SIZE + 1];
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char name[NBD_MAX_NAME_SIZE + 1];
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@ -272,11 +285,11 @@ static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length)
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*/
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*/
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TRACE("Checking length");
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TRACE("Checking length");
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if (length >= sizeof(name)) {
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if (length >= sizeof(name)) {
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LOG("Bad length received");
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error_setg(errp, "Bad length received");
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return -EINVAL;
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return -EINVAL;
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}
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}
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if (nbd_read(client->ioc, name, length, NULL) < 0) {
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if (nbd_read(client->ioc, name, length, errp) < 0) {
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LOG("read failed");
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error_prepend(errp, "read failed: ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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name[length] = '\0';
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name[length] = '\0';
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@ -285,7 +298,7 @@ static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length)
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client->exp = nbd_export_find(name);
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client->exp = nbd_export_find(name);
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if (!client->exp) {
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if (!client->exp) {
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LOG("export not found");
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error_setg(errp, "export not found");
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return -EINVAL;
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return -EINVAL;
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}
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}
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@ -298,7 +311,8 @@ static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length)
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/* Handle NBD_OPT_STARTTLS. Return NULL to drop connection, or else the
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/* Handle NBD_OPT_STARTTLS. Return NULL to drop connection, or else the
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* new channel for all further (now-encrypted) communication. */
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* new channel for all further (now-encrypted) communication. */
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static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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uint32_t length)
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uint32_t length,
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Error **errp)
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{
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{
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QIOChannel *ioc;
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QIOChannel *ioc;
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QIOChannelTLS *tioc;
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QIOChannelTLS *tioc;
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@ -307,23 +321,24 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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TRACE("Setting up TLS");
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TRACE("Setting up TLS");
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ioc = client->ioc;
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ioc = client->ioc;
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if (length) {
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if (length) {
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if (nbd_drop(ioc, length, NULL) < 0) {
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if (nbd_drop(ioc, length, errp) < 0) {
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return NULL;
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return NULL;
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}
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}
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nbd_negotiate_send_rep_err(ioc, NBD_REP_ERR_INVALID, NBD_OPT_STARTTLS,
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nbd_negotiate_send_rep_err(ioc, NBD_REP_ERR_INVALID, NBD_OPT_STARTTLS,
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errp,
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"OPT_STARTTLS should not have length");
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"OPT_STARTTLS should not have length");
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return NULL;
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return NULL;
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}
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}
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if (nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK,
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if (nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK,
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NBD_OPT_STARTTLS) < 0) {
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NBD_OPT_STARTTLS, errp) < 0) {
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return NULL;
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return NULL;
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}
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}
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tioc = qio_channel_tls_new_server(ioc,
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tioc = qio_channel_tls_new_server(ioc,
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client->tlscreds,
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client->tlscreds,
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client->tlsaclname,
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client->tlsaclname,
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NULL);
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errp);
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if (!tioc) {
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if (!tioc) {
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return NULL;
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return NULL;
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}
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}
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@ -342,7 +357,7 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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g_main_loop_unref(data.loop);
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g_main_loop_unref(data.loop);
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if (data.error) {
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if (data.error) {
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object_unref(OBJECT(tioc));
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object_unref(OBJECT(tioc));
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error_free(data.error);
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error_propagate(errp, data.error);
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return NULL;
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return NULL;
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}
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}
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@ -352,14 +367,16 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient *client,
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/* nbd_negotiate_options
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/* nbd_negotiate_options
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* Process all NBD_OPT_* client option commands.
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* Process all NBD_OPT_* client option commands.
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* Return:
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* Return:
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* -errno on error
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* -errno on error, errp is set
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* 0 on successful negotiation
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* 0 on successful negotiation, errp is not set
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* 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect
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* 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect,
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* errp is not set
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*/
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*/
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static int nbd_negotiate_options(NBDClient *client)
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static int nbd_negotiate_options(NBDClient *client, Error **errp)
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{
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{
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uint32_t flags;
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uint32_t flags;
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bool fixedNewstyle = false;
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bool fixedNewstyle = false;
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Error *local_err = NULL;
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/* Client sends:
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/* Client sends:
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[ 0 .. 3] client flags
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[ 0 .. 3] client flags
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@ -375,8 +392,8 @@ static int nbd_negotiate_options(NBDClient *client)
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... Rest of request
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... Rest of request
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*/
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*/
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if (nbd_read(client->ioc, &flags, sizeof(flags), NULL) < 0) {
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if (nbd_read(client->ioc, &flags, sizeof(flags), errp) < 0) {
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LOG("read failed");
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error_prepend(errp, "read failed: ");
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return -EIO;
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return -EIO;
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}
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}
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TRACE("Checking client flags");
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TRACE("Checking client flags");
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@ -392,7 +409,7 @@ static int nbd_negotiate_options(NBDClient *client)
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flags &= ~NBD_FLAG_C_NO_ZEROES;
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flags &= ~NBD_FLAG_C_NO_ZEROES;
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}
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}
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if (flags != 0) {
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if (flags != 0) {
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TRACE("Unknown client flags 0x%" PRIx32 " received", flags);
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error_setg(errp, "Unknown client flags 0x%" PRIx32 " received", flags);
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return -EIO;
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return -EIO;
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}
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}
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@ -401,26 +418,25 @@ static int nbd_negotiate_options(NBDClient *client)
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uint32_t clientflags, length;
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uint32_t clientflags, length;
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uint64_t magic;
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uint64_t magic;
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if (nbd_read(client->ioc, &magic, sizeof(magic), NULL) < 0) {
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if (nbd_read(client->ioc, &magic, sizeof(magic), errp) < 0) {
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LOG("read failed");
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error_prepend(errp, "read failed: ");
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return -EINVAL;
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return -EINVAL;
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}
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}
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TRACE("Checking opts magic");
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TRACE("Checking opts magic");
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if (magic != be64_to_cpu(NBD_OPTS_MAGIC)) {
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if (magic != be64_to_cpu(NBD_OPTS_MAGIC)) {
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LOG("Bad magic received");
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error_setg(errp, "Bad magic received");
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return -EINVAL;
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return -EINVAL;
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}
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}
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if (nbd_read(client->ioc, &clientflags,
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if (nbd_read(client->ioc, &clientflags,
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sizeof(clientflags), NULL) < 0)
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sizeof(clientflags), errp) < 0) {
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{
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error_prepend(errp, "read failed: ");
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LOG("read failed");
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return -EINVAL;
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return -EINVAL;
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}
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}
|
||||||
clientflags = be32_to_cpu(clientflags);
|
clientflags = be32_to_cpu(clientflags);
|
||||||
|
|
||||||
if (nbd_read(client->ioc, &length, sizeof(length), NULL) < 0) {
|
if (nbd_read(client->ioc, &length, sizeof(length), errp) < 0) {
|
||||||
LOG("read failed");
|
error_prepend(errp, "read failed: ");
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
length = be32_to_cpu(length);
|
length = be32_to_cpu(length);
|
||||||
|
@ -430,12 +446,12 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
client->ioc == (QIOChannel *)client->sioc) {
|
client->ioc == (QIOChannel *)client->sioc) {
|
||||||
QIOChannel *tioc;
|
QIOChannel *tioc;
|
||||||
if (!fixedNewstyle) {
|
if (!fixedNewstyle) {
|
||||||
TRACE("Unsupported option 0x%" PRIx32, clientflags);
|
error_setg(errp, "Unsupported option 0x%" PRIx32, clientflags);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
switch (clientflags) {
|
switch (clientflags) {
|
||||||
case NBD_OPT_STARTTLS:
|
case NBD_OPT_STARTTLS:
|
||||||
tioc = nbd_negotiate_handle_starttls(client, length);
|
tioc = nbd_negotiate_handle_starttls(client, length, errp);
|
||||||
if (!tioc) {
|
if (!tioc) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
|
@ -445,16 +461,17 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
|
|
||||||
case NBD_OPT_EXPORT_NAME:
|
case NBD_OPT_EXPORT_NAME:
|
||||||
/* No way to return an error to client, so drop connection */
|
/* No way to return an error to client, so drop connection */
|
||||||
TRACE("Option 0x%x not permitted before TLS", clientflags);
|
error_setg(errp, "Option 0x%x not permitted before TLS",
|
||||||
|
clientflags);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
|
|
||||||
default:
|
default:
|
||||||
if (nbd_drop(client->ioc, length, NULL) < 0) {
|
if (nbd_drop(client->ioc, length, errp) < 0) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
ret = nbd_negotiate_send_rep_err(client->ioc,
|
ret = nbd_negotiate_send_rep_err(client->ioc,
|
||||||
NBD_REP_ERR_TLS_REQD,
|
NBD_REP_ERR_TLS_REQD,
|
||||||
clientflags,
|
clientflags, errp,
|
||||||
"Option 0x%" PRIx32
|
"Option 0x%" PRIx32
|
||||||
"not permitted before TLS",
|
"not permitted before TLS",
|
||||||
clientflags);
|
clientflags);
|
||||||
|
@ -470,7 +487,7 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
} else if (fixedNewstyle) {
|
} else if (fixedNewstyle) {
|
||||||
switch (clientflags) {
|
switch (clientflags) {
|
||||||
case NBD_OPT_LIST:
|
case NBD_OPT_LIST:
|
||||||
ret = nbd_negotiate_handle_list(client, length);
|
ret = nbd_negotiate_handle_list(client, length, errp);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -480,25 +497,33 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
/* NBD spec says we must try to reply before
|
/* NBD spec says we must try to reply before
|
||||||
* disconnecting, but that we must also tolerate
|
* disconnecting, but that we must also tolerate
|
||||||
* guests that don't wait for our reply. */
|
* guests that don't wait for our reply. */
|
||||||
nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK, clientflags);
|
nbd_negotiate_send_rep(client->ioc, NBD_REP_ACK, clientflags,
|
||||||
|
&local_err);
|
||||||
|
|
||||||
|
if (local_err != NULL) {
|
||||||
|
TRACE("Reply to NBD_OPT_ABORT request failed: %s",
|
||||||
|
error_get_pretty(local_err));
|
||||||
|
error_free(local_err);
|
||||||
|
}
|
||||||
|
|
||||||
return 1;
|
return 1;
|
||||||
|
|
||||||
case NBD_OPT_EXPORT_NAME:
|
case NBD_OPT_EXPORT_NAME:
|
||||||
return nbd_negotiate_handle_export_name(client, length);
|
return nbd_negotiate_handle_export_name(client, length, errp);
|
||||||
|
|
||||||
case NBD_OPT_STARTTLS:
|
case NBD_OPT_STARTTLS:
|
||||||
if (nbd_drop(client->ioc, length, NULL) < 0) {
|
if (nbd_drop(client->ioc, length, errp) < 0) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
if (client->tlscreds) {
|
if (client->tlscreds) {
|
||||||
ret = nbd_negotiate_send_rep_err(client->ioc,
|
ret = nbd_negotiate_send_rep_err(client->ioc,
|
||||||
NBD_REP_ERR_INVALID,
|
NBD_REP_ERR_INVALID,
|
||||||
clientflags,
|
clientflags, errp,
|
||||||
"TLS already enabled");
|
"TLS already enabled");
|
||||||
} else {
|
} else {
|
||||||
ret = nbd_negotiate_send_rep_err(client->ioc,
|
ret = nbd_negotiate_send_rep_err(client->ioc,
|
||||||
NBD_REP_ERR_POLICY,
|
NBD_REP_ERR_POLICY,
|
||||||
clientflags,
|
clientflags, errp,
|
||||||
"TLS not configured");
|
"TLS not configured");
|
||||||
}
|
}
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
|
@ -506,12 +531,12 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
}
|
}
|
||||||
break;
|
break;
|
||||||
default:
|
default:
|
||||||
if (nbd_drop(client->ioc, length, NULL) < 0) {
|
if (nbd_drop(client->ioc, length, errp) < 0) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
ret = nbd_negotiate_send_rep_err(client->ioc,
|
ret = nbd_negotiate_send_rep_err(client->ioc,
|
||||||
NBD_REP_ERR_UNSUP,
|
NBD_REP_ERR_UNSUP,
|
||||||
clientflags,
|
clientflags, errp,
|
||||||
"Unsupported option 0x%"
|
"Unsupported option 0x%"
|
||||||
PRIx32,
|
PRIx32,
|
||||||
clientflags);
|
clientflags);
|
||||||
|
@ -527,10 +552,10 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
*/
|
*/
|
||||||
switch (clientflags) {
|
switch (clientflags) {
|
||||||
case NBD_OPT_EXPORT_NAME:
|
case NBD_OPT_EXPORT_NAME:
|
||||||
return nbd_negotiate_handle_export_name(client, length);
|
return nbd_negotiate_handle_export_name(client, length, errp);
|
||||||
|
|
||||||
default:
|
default:
|
||||||
TRACE("Unsupported option 0x%" PRIx32, clientflags);
|
error_setg(errp, "Unsupported option 0x%" PRIx32, clientflags);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -539,11 +564,12 @@ static int nbd_negotiate_options(NBDClient *client)
|
||||||
|
|
||||||
/* nbd_negotiate
|
/* nbd_negotiate
|
||||||
* Return:
|
* Return:
|
||||||
* -errno on error
|
* -errno on error, errp is set
|
||||||
* 0 on successful negotiation
|
* 0 on successful negotiation, errp is not set
|
||||||
* 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect
|
* 1 if client sent NBD_OPT_ABORT, i.e. on valid disconnect,
|
||||||
|
* errp is not set
|
||||||
*/
|
*/
|
||||||
static coroutine_fn int nbd_negotiate(NBDClient *client)
|
static coroutine_fn int nbd_negotiate(NBDClient *client, Error **errp)
|
||||||
{
|
{
|
||||||
char buf[8 + 8 + 8 + 128];
|
char buf[8 + 8 + 8 + 128];
|
||||||
int ret;
|
int ret;
|
||||||
|
@ -585,21 +611,23 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
|
||||||
stq_be_p(buf + 16, client->exp->size);
|
stq_be_p(buf + 16, client->exp->size);
|
||||||
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
|
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
|
||||||
|
|
||||||
if (nbd_write(client->ioc, buf, sizeof(buf), NULL) < 0) {
|
if (nbd_write(client->ioc, buf, sizeof(buf), errp) < 0) {
|
||||||
LOG("write failed");
|
error_prepend(errp, "write failed: ");
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
stq_be_p(buf + 8, NBD_OPTS_MAGIC);
|
stq_be_p(buf + 8, NBD_OPTS_MAGIC);
|
||||||
stw_be_p(buf + 16, NBD_FLAG_FIXED_NEWSTYLE | NBD_FLAG_NO_ZEROES);
|
stw_be_p(buf + 16, NBD_FLAG_FIXED_NEWSTYLE | NBD_FLAG_NO_ZEROES);
|
||||||
|
|
||||||
if (nbd_write(client->ioc, buf, 18, NULL) < 0) {
|
if (nbd_write(client->ioc, buf, 18, errp) < 0) {
|
||||||
LOG("write failed");
|
error_prepend(errp, "write failed: ");
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
ret = nbd_negotiate_options(client);
|
ret = nbd_negotiate_options(client, errp);
|
||||||
if (ret != 0) {
|
if (ret != 0) {
|
||||||
LOG("option negotiation failed");
|
if (ret < 0) {
|
||||||
|
error_prepend(errp, "option negotiation failed: ");
|
||||||
|
}
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -608,9 +636,9 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
|
||||||
stq_be_p(buf + 18, client->exp->size);
|
stq_be_p(buf + 18, client->exp->size);
|
||||||
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
|
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
|
||||||
len = client->no_zeroes ? 10 : sizeof(buf) - 18;
|
len = client->no_zeroes ? 10 : sizeof(buf) - 18;
|
||||||
ret = nbd_write(client->ioc, buf + 18, len, NULL);
|
ret = nbd_write(client->ioc, buf + 18, len, errp);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("write failed");
|
error_prepend(errp, "write failed: ");
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -620,13 +648,14 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
static int nbd_receive_request(QIOChannel *ioc, NBDRequest *request)
|
static int nbd_receive_request(QIOChannel *ioc, NBDRequest *request,
|
||||||
|
Error **errp)
|
||||||
{
|
{
|
||||||
uint8_t buf[NBD_REQUEST_SIZE];
|
uint8_t buf[NBD_REQUEST_SIZE];
|
||||||
uint32_t magic;
|
uint32_t magic;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
ret = nbd_read(ioc, buf, sizeof(buf), NULL);
|
ret = nbd_read(ioc, buf, sizeof(buf), errp);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
@ -652,7 +681,7 @@ static int nbd_receive_request(QIOChannel *ioc, NBDRequest *request)
|
||||||
magic, request->flags, request->type, request->from, request->len);
|
magic, request->flags, request->type, request->from, request->len);
|
||||||
|
|
||||||
if (magic != NBD_REQUEST_MAGIC) {
|
if (magic != NBD_REQUEST_MAGIC) {
|
||||||
LOG("invalid magic (got 0x%" PRIx32 ")", magic);
|
error_setg(errp, "invalid magic (got 0x%" PRIx32 ")", magic);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
return 0;
|
return 0;
|
||||||
|
@ -998,13 +1027,14 @@ static int nbd_co_send_reply(NBDRequestData *req, NBDReply *reply, int len)
|
||||||
* the client (although the caller may still need to disconnect after reporting
|
* the client (although the caller may still need to disconnect after reporting
|
||||||
* the error).
|
* the error).
|
||||||
*/
|
*/
|
||||||
static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request)
|
static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request,
|
||||||
|
Error **errp)
|
||||||
{
|
{
|
||||||
NBDClient *client = req->client;
|
NBDClient *client = req->client;
|
||||||
|
|
||||||
g_assert(qemu_in_coroutine());
|
g_assert(qemu_in_coroutine());
|
||||||
assert(client->recv_coroutine == qemu_coroutine_self());
|
assert(client->recv_coroutine == qemu_coroutine_self());
|
||||||
if (nbd_receive_request(client->ioc, request) < 0) {
|
if (nbd_receive_request(client->ioc, request, errp) < 0) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1026,27 +1056,29 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request)
|
||||||
* checks as possible until after reading any NBD_CMD_WRITE
|
* checks as possible until after reading any NBD_CMD_WRITE
|
||||||
* payload, so we can try and keep the connection alive. */
|
* payload, so we can try and keep the connection alive. */
|
||||||
if ((request->from + request->len) < request->from) {
|
if ((request->from + request->len) < request->from) {
|
||||||
LOG("integer overflow detected, you're probably being attacked");
|
error_setg(errp,
|
||||||
|
"integer overflow detected, you're probably being attacked");
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (request->type == NBD_CMD_READ || request->type == NBD_CMD_WRITE) {
|
if (request->type == NBD_CMD_READ || request->type == NBD_CMD_WRITE) {
|
||||||
if (request->len > NBD_MAX_BUFFER_SIZE) {
|
if (request->len > NBD_MAX_BUFFER_SIZE) {
|
||||||
LOG("len (%" PRIu32" ) is larger than max len (%u)",
|
error_setg(errp, "len (%" PRIu32" ) is larger than max len (%u)",
|
||||||
request->len, NBD_MAX_BUFFER_SIZE);
|
request->len, NBD_MAX_BUFFER_SIZE);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
|
|
||||||
req->data = blk_try_blockalign(client->exp->blk, request->len);
|
req->data = blk_try_blockalign(client->exp->blk, request->len);
|
||||||
if (req->data == NULL) {
|
if (req->data == NULL) {
|
||||||
|
error_setg(errp, "No memory");
|
||||||
return -ENOMEM;
|
return -ENOMEM;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
if (request->type == NBD_CMD_WRITE) {
|
if (request->type == NBD_CMD_WRITE) {
|
||||||
TRACE("Reading %" PRIu32 " byte(s)", request->len);
|
TRACE("Reading %" PRIu32 " byte(s)", request->len);
|
||||||
|
|
||||||
if (nbd_read(client->ioc, req->data, request->len, NULL) < 0) {
|
if (nbd_read(client->ioc, req->data, request->len, errp) < 0) {
|
||||||
LOG("reading from socket failed");
|
error_prepend(errp, "reading from socket failed: ");
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
req->complete = true;
|
req->complete = true;
|
||||||
|
@ -1054,18 +1086,18 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request)
|
||||||
|
|
||||||
/* Sanity checks, part 2. */
|
/* Sanity checks, part 2. */
|
||||||
if (request->from + request->len > client->exp->size) {
|
if (request->from + request->len > client->exp->size) {
|
||||||
LOG("operation past EOF; From: %" PRIu64 ", Len: %" PRIu32
|
error_setg(errp, "operation past EOF; From: %" PRIu64 ", Len: %" PRIu32
|
||||||
", Size: %" PRIu64, request->from, request->len,
|
", Size: %" PRIu64, request->from, request->len,
|
||||||
(uint64_t)client->exp->size);
|
(uint64_t)client->exp->size);
|
||||||
return request->type == NBD_CMD_WRITE ? -ENOSPC : -EINVAL;
|
return request->type == NBD_CMD_WRITE ? -ENOSPC : -EINVAL;
|
||||||
}
|
}
|
||||||
if (request->flags & ~(NBD_CMD_FLAG_FUA | NBD_CMD_FLAG_NO_HOLE)) {
|
if (request->flags & ~(NBD_CMD_FLAG_FUA | NBD_CMD_FLAG_NO_HOLE)) {
|
||||||
LOG("unsupported flags (got 0x%x)", request->flags);
|
error_setg(errp, "unsupported flags (got 0x%x)", request->flags);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
if (request->type != NBD_CMD_WRITE_ZEROES &&
|
if (request->type != NBD_CMD_WRITE_ZEROES &&
|
||||||
(request->flags & NBD_CMD_FLAG_NO_HOLE)) {
|
(request->flags & NBD_CMD_FLAG_NO_HOLE)) {
|
||||||
LOG("unexpected flags (got 0x%x)", request->flags);
|
error_setg(errp, "unexpected flags (got 0x%x)", request->flags);
|
||||||
return -EINVAL;
|
return -EINVAL;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1083,6 +1115,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
int ret;
|
int ret;
|
||||||
int flags;
|
int flags;
|
||||||
int reply_data_len = 0;
|
int reply_data_len = 0;
|
||||||
|
Error *local_err = NULL;
|
||||||
|
|
||||||
TRACE("Reading request.");
|
TRACE("Reading request.");
|
||||||
if (client->closing) {
|
if (client->closing) {
|
||||||
|
@ -1091,7 +1124,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
}
|
}
|
||||||
|
|
||||||
req = nbd_request_get(client);
|
req = nbd_request_get(client);
|
||||||
ret = nbd_co_receive_request(req, &request);
|
ret = nbd_co_receive_request(req, &request, &local_err);
|
||||||
client->recv_coroutine = NULL;
|
client->recv_coroutine = NULL;
|
||||||
nbd_client_receive_next_request(client);
|
nbd_client_receive_next_request(client);
|
||||||
if (ret == -EIO) {
|
if (ret == -EIO) {
|
||||||
|
@ -1122,7 +1155,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
if (request.flags & NBD_CMD_FLAG_FUA) {
|
if (request.flags & NBD_CMD_FLAG_FUA) {
|
||||||
ret = blk_co_flush(exp->blk);
|
ret = blk_co_flush(exp->blk);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("flush failed");
|
error_setg_errno(&local_err, -ret, "flush failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
@ -1131,7 +1164,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
ret = blk_pread(exp->blk, request.from + exp->dev_offset,
|
ret = blk_pread(exp->blk, request.from + exp->dev_offset,
|
||||||
req->data, request.len);
|
req->data, request.len);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("reading from file failed");
|
error_setg_errno(&local_err, -ret, "reading from file failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
@ -1158,7 +1191,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
ret = blk_pwrite(exp->blk, request.from + exp->dev_offset,
|
ret = blk_pwrite(exp->blk, request.from + exp->dev_offset,
|
||||||
req->data, request.len, flags);
|
req->data, request.len, flags);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("writing to file failed");
|
error_setg_errno(&local_err, -ret, "writing to file failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1167,7 +1200,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
TRACE("Request type is WRITE_ZEROES");
|
TRACE("Request type is WRITE_ZEROES");
|
||||||
|
|
||||||
if (exp->nbdflags & NBD_FLAG_READ_ONLY) {
|
if (exp->nbdflags & NBD_FLAG_READ_ONLY) {
|
||||||
TRACE("Server is read-only, return error");
|
error_setg(&local_err, "Server is read-only, return error");
|
||||||
reply.error = EROFS;
|
reply.error = EROFS;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
@ -1184,7 +1217,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
ret = blk_pwrite_zeroes(exp->blk, request.from + exp->dev_offset,
|
ret = blk_pwrite_zeroes(exp->blk, request.from + exp->dev_offset,
|
||||||
request.len, flags);
|
request.len, flags);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("writing to file failed");
|
error_setg_errno(&local_err, -ret, "writing to file failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1198,7 +1231,7 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
|
|
||||||
ret = blk_co_flush(exp->blk);
|
ret = blk_co_flush(exp->blk);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("flush failed");
|
error_setg_errno(&local_err, -ret, "flush failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1208,21 +1241,35 @@ static coroutine_fn void nbd_trip(void *opaque)
|
||||||
ret = blk_co_pdiscard(exp->blk, request.from + exp->dev_offset,
|
ret = blk_co_pdiscard(exp->blk, request.from + exp->dev_offset,
|
||||||
request.len);
|
request.len);
|
||||||
if (ret < 0) {
|
if (ret < 0) {
|
||||||
LOG("discard failed");
|
error_setg_errno(&local_err, -ret, "discard failed");
|
||||||
reply.error = -ret;
|
reply.error = -ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
break;
|
break;
|
||||||
default:
|
default:
|
||||||
LOG("invalid request type (%" PRIu32 ") received", request.type);
|
error_setg(&local_err, "invalid request type (%" PRIu32 ") received",
|
||||||
|
request.type);
|
||||||
reply.error = EINVAL;
|
reply.error = EINVAL;
|
||||||
}
|
}
|
||||||
|
|
||||||
reply:
|
reply:
|
||||||
|
if (local_err) {
|
||||||
|
/* If we are here local_err is not fatal error, already stored in
|
||||||
|
* reply.error */
|
||||||
|
error_report_err(local_err);
|
||||||
|
local_err = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (nbd_co_send_reply(req, &reply, reply_data_len) < 0) {
|
||||||
|
error_setg(&local_err, "Failed to send reply");
|
||||||
|
goto disconnect;
|
||||||
|
}
|
||||||
|
|
||||||
/* We must disconnect after NBD_CMD_WRITE if we did not
|
/* We must disconnect after NBD_CMD_WRITE if we did not
|
||||||
* read the payload.
|
* read the payload.
|
||||||
*/
|
*/
|
||||||
if (nbd_co_send_reply(req, &reply, reply_data_len) < 0 || !req->complete) {
|
if (!req->complete) {
|
||||||
|
error_setg(&local_err, "Request handling failed in intermediate state");
|
||||||
goto disconnect;
|
goto disconnect;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1234,6 +1281,9 @@ done:
|
||||||
return;
|
return;
|
||||||
|
|
||||||
disconnect:
|
disconnect:
|
||||||
|
if (local_err) {
|
||||||
|
error_reportf_err(local_err, "Disconnect client, due to: ");
|
||||||
|
}
|
||||||
nbd_request_put(req);
|
nbd_request_put(req);
|
||||||
client_close(client, true);
|
client_close(client, true);
|
||||||
nbd_client_put(client);
|
nbd_client_put(client);
|
||||||
|
@ -1252,6 +1302,7 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
|
||||||
{
|
{
|
||||||
NBDClient *client = opaque;
|
NBDClient *client = opaque;
|
||||||
NBDExport *exp = client->exp;
|
NBDExport *exp = client->exp;
|
||||||
|
Error *local_err = NULL;
|
||||||
|
|
||||||
if (exp) {
|
if (exp) {
|
||||||
nbd_export_get(exp);
|
nbd_export_get(exp);
|
||||||
|
@ -1259,7 +1310,10 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
|
||||||
}
|
}
|
||||||
qemu_co_mutex_init(&client->send_lock);
|
qemu_co_mutex_init(&client->send_lock);
|
||||||
|
|
||||||
if (nbd_negotiate(client)) {
|
if (nbd_negotiate(client, &local_err)) {
|
||||||
|
if (local_err) {
|
||||||
|
error_report_err(local_err);
|
||||||
|
}
|
||||||
client_close(client, false);
|
client_close(client, false);
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue