X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Frelayd%2Frelayd.c;h=90312b5896f829c5d4c85be4fa7c1b4409d463d4;hb=HEAD;hp=bed0933d1102ae4d13454ba3d152fd86d831f377;hpb=6151a90fe7fa3dea52c57771df9083e56de7a60b;p=lttng-tools.git diff --git a/src/common/relayd/relayd.c b/src/common/relayd/relayd.c deleted file mode 100644 index bed0933d1..000000000 --- a/src/common/relayd/relayd.c +++ /dev/null @@ -1,636 +0,0 @@ -/* - * Copyright (C) 2012 - David Goulet - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License, version 2 only, as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 51 - * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#define _GNU_SOURCE -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "relayd.h" - -/* - * Send command. Fill up the header and append the data. - */ -static int send_command(struct lttcomm_relayd_sock *rsock, - enum lttcomm_relayd_command cmd, void *data, size_t size, - int flags) -{ - int ret; - struct lttcomm_relayd_hdr header; - char *buf; - uint64_t buf_size = sizeof(header); - - if (data) { - buf_size += size; - } - - buf = zmalloc(buf_size); - if (buf == NULL) { - PERROR("zmalloc relayd send command buf"); - ret = -1; - goto alloc_error; - } - - header.cmd = htobe32(cmd); - header.data_size = htobe64(size); - - /* Zeroed for now since not used. */ - header.cmd_version = 0; - header.circuit_id = 0; - - /* Prepare buffer to send. */ - memcpy(buf, &header, sizeof(header)); - if (data) { - memcpy(buf + sizeof(header), data, size); - } - - ret = rsock->sock.ops->sendmsg(&rsock->sock, buf, buf_size, flags); - if (ret < 0) { - ret = -errno; - goto error; - } - - DBG3("Relayd sending command %d of size %" PRIu64, cmd, buf_size); - -error: - free(buf); -alloc_error: - return ret; -} - -/* - * Receive reply data on socket. This MUST be call after send_command or else - * could result in unexpected behavior(s). - */ -static int recv_reply(struct lttcomm_relayd_sock *rsock, void *data, size_t size) -{ - int ret; - - DBG3("Relayd waiting for reply of size %ld", size); - - ret = rsock->sock.ops->recvmsg(&rsock->sock, data, size, 0); - if (ret <= 0 || ret != size) { - if (ret == 0) { - /* Orderly shutdown. */ - DBG("Socket %d has performed an orderly shutdown", rsock->sock.fd); - } else { - DBG("Receiving reply failed on sock %d for size %lu with ret %d", - rsock->sock.fd, size, ret); - } - /* Always return -1 here and the caller can use errno. */ - ret = -1; - goto error; - } - -error: - return ret; -} - -/* - * Send a RELAYD_CREATE_SESSION command to the relayd with the given socket and - * set session_id of the relayd if we have a successful reply from the relayd. - * - * On success, return 0 else a negative value which is either an errno error or - * a lttng error code from the relayd. - */ -int relayd_create_session(struct lttcomm_relayd_sock *rsock, uint64_t *session_id) -{ - int ret; - struct lttcomm_relayd_status_session reply; - - assert(rsock); - assert(session_id); - - DBG("Relayd create session"); - - /* Send command */ - ret = send_command(rsock, RELAYD_CREATE_SESSION, NULL, 0, 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.session_id = be64toh(reply.session_id); - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code != LTTNG_OK) { - ret = -1; - ERR("Relayd create session replied error %d", reply.ret_code); - goto error; - } else { - ret = 0; - *session_id = reply.session_id; - } - - DBG("Relayd session created with id %" PRIu64, reply.session_id); - -error: - return ret; -} - -/* - * Add stream on the relayd and assign stream handle to the stream_id argument. - * - * On success return 0 else return ret_code negative value. - */ -int relayd_add_stream(struct lttcomm_relayd_sock *rsock, const char *channel_name, - const char *pathname, uint64_t *stream_id) -{ - int ret; - struct lttcomm_relayd_add_stream msg; - struct lttcomm_relayd_status_stream reply; - - /* Code flow error. Safety net. */ - assert(rsock); - assert(channel_name); - assert(pathname); - - DBG("Relayd adding stream for channel name %s", channel_name); - - strncpy(msg.channel_name, channel_name, sizeof(msg.channel_name)); - strncpy(msg.pathname, pathname, sizeof(msg.pathname)); - - /* Send command */ - ret = send_command(rsock, RELAYD_ADD_STREAM, (void *) &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Waiting for reply */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - /* Back to host bytes order. */ - reply.handle = be64toh(reply.handle); - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code != LTTNG_OK) { - ret = -1; - ERR("Relayd add stream replied error %d", reply.ret_code); - } else { - /* Success */ - ret = 0; - *stream_id = reply.handle; - } - - DBG("Relayd stream added successfully with handle %" PRIu64, - reply.handle); - -error: - return ret; -} - -/* - * Check version numbers on the relayd. - * If major versions are compatible, we assign minor_to_use to the - * minor version of the procotol we are going to use for this session. - * - * Return 0 if compatible else negative value. - */ -int relayd_version_check(struct lttcomm_relayd_sock *rsock) -{ - int ret; - struct lttcomm_relayd_version msg; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd version check for major.minor %u.%u", rsock->major, - rsock->minor); - - /* Prepare network byte order before transmission. */ - msg.major = htobe32(rsock->major); - msg.minor = htobe32(rsock->minor); - - /* Send command */ - ret = send_command(rsock, RELAYD_VERSION, (void *) &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &msg, sizeof(msg)); - if (ret < 0) { - goto error; - } - - /* Set back to host bytes order */ - msg.major = be32toh(msg.major); - msg.minor = be32toh(msg.minor); - - /* - * Only validate the major version. If the other side is higher, - * communication is not possible. Only major version equal can talk to each - * other. If the minor version differs, the lowest version is used by both - * sides. - */ - if (msg.major != rsock->major) { - /* Not compatible */ - ret = -1; - DBG2("Relayd version is NOT compatible. Relayd version %u != %u (us)", - msg.major, rsock->major); - goto error; - } - - /* - * If the relayd's minor version is higher, it will adapt to our version so - * we can continue to use the latest relayd communication data structure. - * If the received minor version is higher, the relayd should adapt to us. - */ - if (rsock->minor > msg.minor) { - rsock->minor = msg.minor; - } - - /* Version number compatible */ - DBG2("Relayd version is compatible, using protocol version %u.%u", - rsock->major, rsock->minor); - ret = 0; - -error: - return ret; -} - -/* - * Add stream on the relayd and assign stream handle to the stream_id argument. - * - * On success return 0 else return ret_code negative value. - */ -int relayd_send_metadata(struct lttcomm_relayd_sock *rsock, size_t len) -{ - int ret; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd sending metadata of size %zu", len); - - /* Send command */ - ret = send_command(rsock, RELAYD_SEND_METADATA, NULL, len, 0); - if (ret < 0) { - goto error; - } - - DBG2("Relayd metadata added successfully"); - - /* - * After that call, the metadata data MUST be sent to the relayd so the - * receive size on the other end matches the len of the metadata packet - * header. This is why we don't wait for a reply here. - */ - -error: - return ret; -} - -/* - * Connect to relay daemon with an allocated lttcomm_relayd_sock. - */ -int relayd_connect(struct lttcomm_relayd_sock *rsock) -{ - /* Code flow error. Safety net. */ - assert(rsock); - - DBG3("Relayd connect ..."); - - return rsock->sock.ops->connect(&rsock->sock); -} - -/* - * Close relayd socket with an allocated lttcomm_relayd_sock. - * - * If no socket operations are found, simply return 0 meaning that everything - * is fine. Without operations, the socket can not possibly be opened or used. - * This is possible if the socket was allocated but not created. However, the - * caller could simply use it to store a valid file descriptor for instance - * passed over a Unix socket and call this to cleanup but still without a valid - * ops pointer. - * - * Return the close returned value. On error, a negative value is usually - * returned back from close(2). - */ -int relayd_close(struct lttcomm_relayd_sock *rsock) -{ - int ret; - - /* Code flow error. Safety net. */ - assert(rsock); - - /* An invalid fd is fine, return success. */ - if (rsock->sock.fd < 0) { - ret = 0; - goto end; - } - - DBG3("Relayd closing socket %d", rsock->sock.fd); - - if (rsock->sock.ops) { - ret = rsock->sock.ops->close(&rsock->sock); - } else { - /* Default call if no specific ops found. */ - ret = close(rsock->sock.fd); - if (ret < 0) { - PERROR("relayd_close default close"); - } - } - -end: - return ret; -} - -/* - * Send data header structure to the relayd. - */ -int relayd_send_data_hdr(struct lttcomm_relayd_sock *rsock, - struct lttcomm_relayd_data_hdr *hdr, size_t size) -{ - int ret; - - /* Code flow error. Safety net. */ - assert(rsock); - assert(hdr); - - DBG3("Relayd sending data header of size %ld", size); - - /* Again, safety net */ - if (size == 0) { - size = sizeof(struct lttcomm_relayd_data_hdr); - } - - /* Only send data header. */ - ret = rsock->sock.ops->sendmsg(&rsock->sock, hdr, size, 0); - if (ret < 0) { - ret = -errno; - goto error; - } - - /* - * The data MUST be sent right after that command for the receive on the - * other end to match the size in the header. - */ - -error: - return ret; -} - -/* - * Send close stream command to the relayd. - */ -int relayd_send_close_stream(struct lttcomm_relayd_sock *rsock, uint64_t stream_id, - uint64_t last_net_seq_num) -{ - int ret; - struct lttcomm_relayd_close_stream msg; - struct lttcomm_relayd_generic_reply reply; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd closing stream id %" PRIu64, stream_id); - - msg.stream_id = htobe64(stream_id); - msg.last_net_seq_num = htobe64(last_net_seq_num); - - /* Send command */ - ret = send_command(rsock, RELAYD_CLOSE_STREAM, (void *) &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code != LTTNG_OK) { - ret = -1; - ERR("Relayd close stream replied error %d", reply.ret_code); - } else { - /* Success */ - ret = 0; - } - - DBG("Relayd close stream id %" PRIu64 " successfully", stream_id); - -error: - return ret; -} - -/* - * Check for data availability for a given stream id. - * - * Return 0 if NOT pending, 1 if so and a negative value on error. - */ -int relayd_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t stream_id, - uint64_t last_net_seq_num) -{ - int ret; - struct lttcomm_relayd_data_pending msg; - struct lttcomm_relayd_generic_reply reply; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd data pending for stream id %" PRIu64, stream_id); - - msg.stream_id = htobe64(stream_id); - msg.last_net_seq_num = htobe64(last_net_seq_num); - - /* Send command */ - ret = send_command(rsock, RELAYD_DATA_PENDING, (void *) &msg, - sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code >= LTTNG_OK) { - ERR("Relayd data pending replied error %d", reply.ret_code); - } - - /* At this point, the ret code is either 1 or 0 */ - ret = reply.ret_code; - - DBG("Relayd data is %s pending for stream id %" PRIu64, - ret == 1 ? "" : "NOT", stream_id); - -error: - return ret; -} - -/* - * Check on the relayd side for a quiescent state on the control socket. - */ -int relayd_quiescent_control(struct lttcomm_relayd_sock *rsock, - uint64_t metadata_stream_id) -{ - int ret; - struct lttcomm_relayd_quiescent_control msg; - struct lttcomm_relayd_generic_reply reply; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd checking quiescent control state"); - - msg.stream_id = htobe64(metadata_stream_id); - - /* Send command */ - ret = send_command(rsock, RELAYD_QUIESCENT_CONTROL, &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code != LTTNG_OK) { - ret = -1; - ERR("Relayd quiescent control replied error %d", reply.ret_code); - goto error; - } - - /* Control socket is quiescent */ - return 0; - -error: - return ret; -} - -/* - * Begin a data pending command for a specific session id. - */ -int relayd_begin_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id) -{ - int ret; - struct lttcomm_relayd_begin_data_pending msg; - struct lttcomm_relayd_generic_reply reply; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd begin data pending"); - - msg.session_id = htobe64(id); - - /* Send command */ - ret = send_command(rsock, RELAYD_BEGIN_DATA_PENDING, &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.ret_code = be32toh(reply.ret_code); - - /* Return session id or negative ret code. */ - if (reply.ret_code != LTTNG_OK) { - ret = -1; - ERR("Relayd begin data pending replied error %d", reply.ret_code); - goto error; - } - - return 0; - -error: - return ret; -} - -/* - * End a data pending command for a specific session id. - * - * Return 0 on success and set is_data_inflight to 0 if no data is being - * streamed or 1 if it is the case. - */ -int relayd_end_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id, - unsigned int *is_data_inflight) -{ - int ret; - struct lttcomm_relayd_end_data_pending msg; - struct lttcomm_relayd_generic_reply reply; - - /* Code flow error. Safety net. */ - assert(rsock); - - DBG("Relayd end data pending"); - - msg.session_id = htobe64(id); - - /* Send command */ - ret = send_command(rsock, RELAYD_END_DATA_PENDING, &msg, sizeof(msg), 0); - if (ret < 0) { - goto error; - } - - /* Receive response */ - ret = recv_reply(rsock, (void *) &reply, sizeof(reply)); - if (ret < 0) { - goto error; - } - - reply.ret_code = be32toh(reply.ret_code); - if (reply.ret_code < 0) { - ret = reply.ret_code; - goto error; - } - - *is_data_inflight = reply.ret_code; - - DBG("Relayd end data pending is data inflight: %d", reply.ret_code); - - return 0; - -error: - return ret; -}