#include "stream.h"
#include "connection.h"
#include "tracefile-array.h"
+#include "tcp_keep_alive.h"
static const char *help_msg =
#ifdef LTTNG_EMBED_HELP
lttcomm_destroy_sock(newsock);
goto error;
}
+
+ ret = socket_apply_keep_alive_config(newsock->fd);
+ if (ret < 0) {
+ ERR("Failed to apply TCP keep-alive configuration on socket (%i)",
+ newsock->fd);
+ lttcomm_destroy_sock(newsock);
+ goto error;
+ }
+
new_conn = connection_create(newsock, type);
if (!new_conn) {
lttcomm_destroy_sock(newsock);
{
int ret;
struct lttcomm_relayd_version reply, msg;
+ bool compatible = true;
conn->version_check_done = 1;
if (reply.major != be32toh(msg.major)) {
DBG("Incompatible major versions (%u vs %u), deleting session",
reply.major, be32toh(msg.major));
- connection_put(conn);
- ret = 0;
- goto end;
+ compatible = false;
}
conn->major = reply.major;
ERR("Relay sending version");
}
+ if (!compatible) {
+ ret = -1;
+ goto end;
+ }
+
DBG("Version check done using protocol %u.%u", conn->major,
conn->minor);
return ret;
}
+/*
+ * relay_mkdir: Create a folder on the disk.
+ */
+static int relay_mkdir(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
+{
+ int ret;
+ ssize_t network_ret;
+ struct relay_session *session = conn->session;
+ struct lttcomm_relayd_mkdir path_info_header;
+ struct lttcomm_relayd_mkdir *path_info = NULL;
+ struct lttcomm_relayd_generic_reply reply;
+ char *path = NULL;
+
+ if (!session || !conn->version_check_done) {
+ ERR("Trying to create a directory before version check");
+ ret = -1;
+ goto end_no_session;
+ }
+
+ if (session->major == 2 && session->minor < 11) {
+ /*
+ * This client is not supposed to use this command since
+ * it predates its introduction.
+ */
+ ERR("relay_mkdir command is unsupported before LTTng 2.11");
+ ret = -1;
+ goto end_no_session;
+ }
+
+ network_ret = conn->sock->ops->recvmsg(conn->sock, &path_info_header,
+ sizeof(path_info_header), 0);
+ if (network_ret < (ssize_t) sizeof(path_info_header)) {
+ if (network_ret == 0) {
+ /* Orderly shutdown. Not necessary to print an error. */
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
+ } else {
+ ERR("Reception of mkdir command argument length failed with ret = %zi, expected %zu",
+ network_ret, sizeof(path_info_header));
+ }
+ ret = -1;
+ goto end_no_session;
+ }
+
+ path_info_header.length = be32toh(path_info_header.length);
+
+ /* Ensure that it fits in local path length. */
+ if (path_info_header.length >= LTTNG_PATH_MAX) {
+ ret = -ENAMETOOLONG;
+ ERR("Path name argument of mkdir command (%" PRIu32 " bytes) exceeds the maximal length allowed (%d bytes)",
+ path_info_header.length, LTTNG_PATH_MAX);
+ goto end;
+ }
+
+ path_info = zmalloc(sizeof(path_info_header) + path_info_header.length);
+ if (!path_info) {
+ PERROR("zmalloc of mkdir command path");
+ ret = -1;
+ goto end;
+ }
+
+ network_ret = conn->sock->ops->recvmsg(conn->sock, path_info->path,
+ path_info_header.length, 0);
+ if (network_ret < (ssize_t) path_info_header.length) {
+ if (network_ret == 0) {
+ /* Orderly shutdown. Not necessary to print an error. */
+ DBG("Socket %d did an orderly shutdown", conn->sock->fd);
+ } else {
+ ERR("Reception of mkdir path argument failed with ret = %zi, expected %" PRIu32,
+ network_ret, path_info_header.length);
+ }
+ ret = -1;
+ goto end_no_session;
+ }
+
+ path = create_output_path(path_info->path);
+ if (!path) {
+ ERR("Failed to create output path");
+ ret = -1;
+ goto end;
+ }
+
+ ret = utils_mkdir_recursive(path, S_IRWXU | S_IRWXG, -1, -1);
+ if (ret < 0) {
+ ERR("relay creating output directory");
+ goto end;
+ }
+
+ ret = 0;
+
+end:
+ memset(&reply, 0, sizeof(reply));
+ if (ret < 0) {
+ reply.ret_code = htobe32(LTTNG_ERR_UNK);
+ } else {
+ reply.ret_code = htobe32(LTTNG_OK);
+ }
+ network_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
+ sizeof(struct lttcomm_relayd_generic_reply), 0);
+ if (network_ret < (ssize_t) sizeof(struct lttcomm_relayd_generic_reply)) {
+ ERR("Failed to send mkdir command status code with ret = %zi, expected %zu",
+ network_ret,
+ sizeof(struct lttcomm_relayd_generic_reply));
+ ret = -1;
+ }
+
+end_no_session:
+ free(path);
+ free(path_info);
+ return ret;
+}
+
+static int validate_rotate_rename_path_length(const char *path_type,
+ uint32_t path_length)
+{
+ int ret = 0;
+
+ if (path_length > LTTNG_PATH_MAX) {
+ ret = -ENAMETOOLONG;
+ ERR("rotate rename \"%s\" path name length (%" PRIu32 " bytes) exceeds the allowed size of %i bytes",
+ path_type, path_length, LTTNG_PATH_MAX);
+ } else if (path_length == 0) {
+ ret = -EINVAL;
+ ERR("rotate rename \"%s\" path name has an illegal length of 0", path_type);
+ }
+ return ret;
+}
+
+/*
+ * relay_rotate_rename: rename the trace folder after a rotation is
+ * completed. We are not closing any fd here, just moving the folder, so it
+ * works even if data is still in-flight.
+ */
+static int relay_rotate_rename(struct lttcomm_relayd_hdr *recv_hdr,
+ struct relay_connection *conn)
+{
+ int ret;
+ ssize_t network_ret;
+ struct relay_session *session = conn->session;
+ struct lttcomm_relayd_generic_reply reply;
+ struct lttcomm_relayd_rotate_rename header;
+ char *received_paths = NULL;
+ size_t received_paths_size;
+ const char *received_old_path, *received_new_path;
+ char *complete_old_path = NULL, *complete_new_path = NULL;
+
+ if (!session || !conn->version_check_done) {
+ ERR("Trying to rename a trace folder before version check");
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ if (session->major == 2 && session->minor < 11) {
+ ERR("relay_rotate_rename command is unsupported before LTTng 2.11");
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ network_ret = conn->sock->ops->recvmsg(conn->sock, &header,
+ sizeof(header), 0);
+ if (network_ret < (ssize_t) sizeof(header)) {
+ if (network_ret == 0) {
+ /* Orderly shutdown. Not necessary to print an error. */
+ DBG("Socket %d did an orderly shutdown",
+ conn->sock->fd);
+ } else {
+ ERR("Relay didn't receive a valid rotate_rename command header: expected %zu bytes, recvmsg() returned %zi",
+ sizeof(header), network_ret);
+ }
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ header.old_path_length = be32toh(header.old_path_length);
+ header.new_path_length = be32toh(header.new_path_length);
+ received_paths_size = header.old_path_length + header.new_path_length;
+
+ /* Ensure the paths don't exceed their allowed size. */
+ ret = validate_rotate_rename_path_length("old", header.old_path_length);
+ if (ret) {
+ goto end;
+ }
+ ret = validate_rotate_rename_path_length("new", header.new_path_length);
+ if (ret) {
+ goto end;
+ }
+
+ received_paths = zmalloc(received_paths_size);
+ if (!received_paths) {
+ PERROR("Could not allocate rotate commands paths reception buffer");
+ ret = -1;
+ goto end;
+ }
+
+ network_ret = conn->sock->ops->recvmsg(conn->sock, received_paths,
+ received_paths_size, 0);
+ if (network_ret < (ssize_t) received_paths_size) {
+ if (network_ret == 0) {
+ /* Orderly shutdown. Not necessary to print an error. */
+ DBG("Socket %d did an orderly shutdown",
+ conn->sock->fd);
+ } else {
+ ERR("Relay failed to received rename command paths (%zu bytes): recvmsg() returned %zi",
+ received_paths_size, network_ret);
+ }
+ ret = -1;
+ goto end_no_reply;
+ }
+
+ /* Validate that both paths received are NULL terminated. */
+ if (received_paths[header.old_path_length - 1] != '\0') {
+ ERR("relay_rotate_rename command's \"old\" path is invalid (not NULL terminated)");
+ ret = -1;
+ goto end;
+ }
+ if (received_paths[received_paths_size - 1] != '\0') {
+ ERR("relay_rotate_rename command's \"new\" path is invalid (not NULL terminated)");
+ ret = -1;
+ goto end;
+ }
+
+ received_old_path = received_paths;
+ received_new_path = received_paths + header.old_path_length;
+
+ complete_old_path = create_output_path(received_old_path);
+ if (!complete_old_path) {
+ ERR("Failed to build old output path in rotate_rename command");
+ ret = -1;
+ goto end;
+ }
+
+ complete_new_path = create_output_path(received_new_path);
+ if (!complete_new_path) {
+ ERR("Failed to build new output path in rotate_rename command");
+ ret = -1;
+ goto end;
+ }
+
+ ret = utils_mkdir_recursive(complete_new_path, S_IRWXU | S_IRWXG,
+ -1, -1);
+ if (ret < 0) {
+ ERR("Failed to mkdir() rotate_rename's \"new\" output directory at \"%s\"",
+ complete_new_path);
+ goto end;
+ }
+
+ /*
+ * If a domain has not yet created its channel, the domain-specific
+ * folder might not exist, but this is not an error.
+ */
+ ret = rename(complete_old_path, complete_new_path);
+ if (ret < 0 && errno != ENOENT) {
+ PERROR("Renaming chunk in rotate_rename command from \"%s\" to \"%s\"",
+ complete_old_path, complete_new_path);
+ goto end;
+ }
+ ret = 0;
+
+end:
+ memset(&reply, 0, sizeof(reply));
+ if (ret < 0) {
+ reply.ret_code = htobe32(LTTNG_ERR_UNK);
+ } else {
+ reply.ret_code = htobe32(LTTNG_OK);
+ }
+ network_ret = conn->sock->ops->sendmsg(conn->sock, &reply,
+ sizeof(struct lttcomm_relayd_generic_reply), 0);
+ if (network_ret < sizeof(struct lttcomm_relayd_generic_reply)) {
+ ERR("Relay sending stream id");
+ ret = -1;
+ }
+
+end_no_reply:
+ free(received_paths);
+ free(complete_old_path);
+ free(complete_new_path);
+ return ret;
+}
+
/*
* Process the commands received on the control socket
*/
case RELAYD_RESET_METADATA:
ret = relay_reset_metadata(recv_hdr, conn);
break;
+ case RELAYD_ROTATE_RENAME:
+ ret = relay_rotate_rename(recv_hdr, conn);
+ break;
+ case RELAYD_MKDIR:
+ ret = relay_mkdir(recv_hdr, conn);
+ break;
case RELAYD_UPDATE_SYNC_INFO:
default:
ERR("Received unknown command (%u)", be32toh(recv_hdr->cmd));
projects / lttng-tools.git / blobdiff