relayd: open live viewer files from the current stream's trace chunk
[lttng-tools.git] / src / common / relayd / relayd.c
index 90c6649acc3f7b26cac59b2c89eb706eb74b0d72..76c54a4a9f6724708f8e3f07153aaea29bddc0fa 100644 (file)
@@ -30,6 +30,7 @@
 #include <common/sessiond-comm/relayd.h>
 #include <common/index/ctf-index.h>
 #include <common/trace-chunk.h>
+#include <common/string-utils/format.h>
 
 #include "relayd.h"
 
@@ -130,7 +131,8 @@ static int relayd_create_session_2_11(struct lttcomm_relayd_sock *rsock,
                const char *session_name, const char *hostname,
                int session_live_timer, unsigned int snapshot,
                uint64_t sessiond_session_id, const lttng_uuid sessiond_uuid,
-               const uint64_t *current_chunk_id)
+               const uint64_t *current_chunk_id,
+               time_t creation_time)
 {
        int ret;
        struct lttcomm_relayd_create_session_2_11 *msg = NULL;
@@ -176,6 +178,8 @@ static int relayd_create_session_2_11(struct lttcomm_relayd_sock *rsock,
                                htobe64(*current_chunk_id));
        }
 
+       msg->creation_time = htobe64((uint64_t) creation_time);
+
        /* Send command */
        ret = send_command(rsock, RELAYD_CREATE_SESSION, msg, msg_length, 0);
        if (ret < 0) {
@@ -248,7 +252,8 @@ int relayd_create_session(struct lttcomm_relayd_sock *rsock,
                int session_live_timer,
                unsigned int snapshot, uint64_t sessiond_session_id,
                const lttng_uuid sessiond_uuid,
-               const uint64_t *current_chunk_id)
+               const uint64_t *current_chunk_id,
+               time_t creation_time)
 {
        int ret;
        struct lttcomm_relayd_status_session reply;
@@ -270,7 +275,7 @@ int relayd_create_session(struct lttcomm_relayd_sock *rsock,
                ret = relayd_create_session_2_11(rsock, session_name,
                                hostname, session_live_timer, snapshot,
                                sessiond_session_id, sessiond_uuid,
-                               current_chunk_id);
+                               current_chunk_id, creation_time);
        }
 
        if (ret < 0) {
@@ -404,7 +409,7 @@ static int relayd_add_stream_2_11(struct lttcomm_relayd_sock *rsock,
 
        msg->tracefile_size = htobe64(tracefile_size);
        msg->tracefile_count = htobe64(tracefile_count);
-       msg->trace_archive_id = htobe64(trace_archive_id);
+       msg->trace_chunk_id = htobe64(trace_archive_id);
 
        /* Send command */
        ret = send_command(rsock, RELAYD_ADD_STREAM, (void *) msg, msg_length, 0);
@@ -1117,81 +1122,296 @@ error:
        return ret;
 }
 
-int relayd_rotate_stream(struct lttcomm_relayd_sock *rsock, uint64_t stream_id,
-               uint64_t new_chunk_id, uint64_t seq_num)
+int relayd_rotate_streams(struct lttcomm_relayd_sock *sock,
+               unsigned int stream_count, const uint64_t *new_chunk_id,
+               const struct relayd_stream_rotation_position *positions)
 {
        int ret;
-       struct lttcomm_relayd_rotate_stream *msg = NULL;
-       struct lttcomm_relayd_generic_reply reply;
-       size_t len;
-       int msg_len;
-       /* FIXME */
-       char *new_pathname = NULL;
+       unsigned int i;
+       struct lttng_dynamic_buffer payload;
+       struct lttcomm_relayd_generic_reply reply = {};
+       const struct lttcomm_relayd_rotate_streams msg = {
+               .stream_count = htobe32((uint32_t) stream_count),
+               .new_chunk_id = (typeof(msg.new_chunk_id)) {
+                       .is_set = !!new_chunk_id,
+                       .value = htobe64(new_chunk_id ? *new_chunk_id : 0),
+               },
+       };
+       char new_chunk_id_buf[MAX_INT_DEC_LEN(*new_chunk_id)] = {};
+       const char *new_chunk_id_str;
+
+       lttng_dynamic_buffer_init(&payload);
 
        /* Code flow error. Safety net. */
-       assert(rsock);
-
-       DBG("Sending rotate stream id %" PRIu64 " command to relayd", stream_id);
+       assert(sock);
 
-       /* Account for the trailing NULL. */
-       len = lttng_strnlen(new_pathname, LTTNG_PATH_MAX) + 1;
-       if (len > LTTNG_PATH_MAX) {
-               ERR("Path used in relayd rotate stream command exceeds the maximal allowed length");
-               ret = -1;
-               goto error;
+       if (new_chunk_id) {
+               ret = snprintf(new_chunk_id_buf, sizeof(new_chunk_id_buf),
+                               "%" PRIu64, *new_chunk_id);
+               if (ret == -1 || ret >= sizeof(new_chunk_id_buf)) {
+                       new_chunk_id_str = "formatting error";
+               } else {
+                       new_chunk_id_str = new_chunk_id_buf;
+               }
+       } else {
+               new_chunk_id_str = "none";
        }
 
-       msg_len = offsetof(struct lttcomm_relayd_rotate_stream, new_pathname) + len;
-       msg = zmalloc(msg_len);
-       if (!msg) {
-               PERROR("Failed to allocate relayd rotate stream command of %d bytes",
-                               msg_len);
-               ret = -1;
-               goto error;
-       }
+       DBG("Preparing \"rotate streams\" command payload: new_chunk_id = %s, stream_count = %u",
+                       new_chunk_id_str, stream_count);
 
-       if (lttng_strncpy(msg->new_pathname, new_pathname, len)) {
-               ret = -1;
-               ERR("Failed to copy relayd rotate stream command's new path name");
+       ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
+       if (ret) {
+               ERR("Failed to allocate \"rotate streams\" command payload");
                goto error;
        }
 
-       msg->pathname_length = htobe32(len);
-       msg->stream_id = htobe64(stream_id);
-       msg->new_chunk_id = htobe64(new_chunk_id);
-       /*
-        * The seq_num is invalid for metadata streams, but it is ignored on
-        * the relay.
-        */
-       msg->rotate_at_seq_num = htobe64(seq_num);
+       for (i = 0; i < stream_count; i++) {
+               const struct relayd_stream_rotation_position *position =
+                               &positions[i];
+               const struct lttcomm_relayd_stream_rotation_position comm_position = {
+                       .stream_id = htobe64(position->stream_id),
+                       .rotate_at_seq_num = htobe64(
+                                       position->rotate_at_seq_num),
+               };
+
+               DBG("Rotate stream %" PRIu64 "at sequence number %" PRIu64,
+                               position->stream_id,
+                               position->rotate_at_seq_num);
+               ret = lttng_dynamic_buffer_append(&payload, &comm_position,
+                               sizeof(comm_position));
+               if (ret) {
+                       ERR("Failed to allocate \"rotate streams\" command payload");
+                       goto error;
+               }
+       }
 
        /* Send command. */
-       ret = send_command(rsock, RELAYD_ROTATE_STREAM, (void *) msg, msg_len, 0);
+       ret = send_command(sock, RELAYD_ROTATE_STREAMS, payload.data,
+                       payload.size, 0);
        if (ret < 0) {
-               ERR("Send rotate command");
+               ERR("Failed to send \"rotate stream\" command");
                goto error;
        }
 
        /* Receive response. */
-       ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
+       ret = recv_reply(sock, &reply, sizeof(reply));
        if (ret < 0) {
-               ERR("Receive rotate reply");
+               ERR("Failed to receive \"rotate streams\" command reply");
                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 rotate stream replied error %d", reply.ret_code);
+               ERR("Relayd rotate streams replied error %d", reply.ret_code);
        } else {
                /* Success. */
                ret = 0;
-               DBG("Relayd rotated stream id %" PRIu64 " successfully", stream_id);
+               DBG("Relayd rotated streams successfully");
        }
 
 error:
-       free(msg);
+       lttng_dynamic_buffer_reset(&payload);
+       return ret;
+}
+
+int relayd_create_trace_chunk(struct lttcomm_relayd_sock *sock,
+               struct lttng_trace_chunk *chunk)
+{
+       int ret = 0;
+       enum lttng_trace_chunk_status status;
+       struct lttcomm_relayd_create_trace_chunk msg = {};
+       struct lttcomm_relayd_generic_reply reply = {};
+       struct lttng_dynamic_buffer payload;
+       uint64_t chunk_id;
+       time_t creation_timestamp;
+       const char *chunk_name;
+       size_t chunk_name_length;
+       bool overriden_name;
+
+       lttng_dynamic_buffer_init(&payload);
+
+       status = lttng_trace_chunk_get_id(chunk, &chunk_id);
+       if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+               ret = -1;
+               goto end;
+       }
+
+       status = lttng_trace_chunk_get_creation_timestamp(
+                       chunk, &creation_timestamp);
+       if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+               ret = -1;
+               goto end;
+       }
+
+       status = lttng_trace_chunk_get_name(
+                       chunk, &chunk_name, &overriden_name);
+       if (status != LTTNG_TRACE_CHUNK_STATUS_OK &&
+                       status != LTTNG_TRACE_CHUNK_STATUS_NONE) {
+               ret = -1;
+               goto end;
+       }
+
+       chunk_name_length = overriden_name ? (strlen(chunk_name) + 1) : 0;
+       msg = (typeof(msg)){
+               .chunk_id = htobe64(chunk_id),
+               .creation_timestamp = htobe64((uint64_t) creation_timestamp),
+               .override_name_length = htobe32((uint32_t) chunk_name_length),
+       };
+
+       ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
+       if (ret) {
+               goto end;
+       }
+       if (chunk_name_length) {
+               ret = lttng_dynamic_buffer_append(
+                               &payload, chunk_name, chunk_name_length);
+               if (ret) {
+                       goto end;
+               }
+       }
+
+       ret = send_command(sock, RELAYD_CREATE_TRACE_CHUNK, payload.data,
+                       payload.size, 0);
+       if (ret < 0) {
+               ERR("Failed to send trace chunk creation command to relay daemon");
+               goto end;
+       }
+
+       ret = recv_reply(sock, &reply, sizeof(reply));
+       if (ret < 0) {
+               ERR("Failed to receive relay daemon trace chunk creation command reply");
+               goto end;
+       }
+
+       reply.ret_code = be32toh(reply.ret_code);
+       if (reply.ret_code != LTTNG_OK) {
+               ret = -1;
+               ERR("Relayd trace chunk create replied error %d",
+                               reply.ret_code);
+       } else {
+               ret = 0;
+               DBG("Relayd successfully created trace chunk: chunk_id = %" PRIu64,
+                               chunk_id);
+       }
+
+end:
+       lttng_dynamic_buffer_reset(&payload);
+       return ret;
+}
+
+int relayd_close_trace_chunk(struct lttcomm_relayd_sock *sock,
+               struct lttng_trace_chunk *chunk)
+{
+       int ret = 0;
+       enum lttng_trace_chunk_status status;
+       struct lttcomm_relayd_close_trace_chunk msg = {};
+       struct lttcomm_relayd_generic_reply reply = {};
+       uint64_t chunk_id;
+       time_t close_timestamp;
+       LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {};
+
+       status = lttng_trace_chunk_get_id(chunk, &chunk_id);
+       if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+               ERR("Failed to get trace chunk id");
+               ret = -1;
+               goto end;
+       }
+
+       status = lttng_trace_chunk_get_close_timestamp(chunk, &close_timestamp);
+       if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+               ERR("Failed to get trace chunk close timestamp");
+               ret = -1;
+               goto end;
+       }
+
+       status = lttng_trace_chunk_get_close_command(chunk,
+                       &close_command.value);
+       switch (status) {
+       case LTTNG_TRACE_CHUNK_STATUS_OK:
+               close_command.is_set = 1;
+               break;
+       case LTTNG_TRACE_CHUNK_STATUS_NONE:
+               break;
+       default:
+               ERR("Failed to get trace chunk close command");
+               ret = -1;
+               goto end;
+       }
+
+       msg = (typeof(msg)){
+               .chunk_id = htobe64(chunk_id),
+               .close_timestamp = htobe64((uint64_t) close_timestamp),
+               .close_command = {
+                       .value = htobe32((uint32_t) close_command.value),
+                       .is_set = close_command.is_set,
+               },
+       };
+
+       ret = send_command(sock, RELAYD_CLOSE_TRACE_CHUNK, &msg, sizeof(msg),
+                       0);
+       if (ret < 0) {
+               ERR("Failed to send trace chunk close command to relay daemon");
+               goto end;
+       }
+
+       ret = recv_reply(sock, &reply, sizeof(reply));
+       if (ret < 0) {
+               ERR("Failed to receive relay daemon trace chunk close command reply");
+               goto end;
+       }
+
+       reply.ret_code = be32toh(reply.ret_code);
+       if (reply.ret_code != LTTNG_OK) {
+               ret = -1;
+               ERR("Relayd trace chunk close replied error %d",
+                               reply.ret_code);
+       } else {
+               ret = 0;
+               DBG("Relayd successfully closed trace chunk: chunk_id = %" PRIu64,
+                               chunk_id);
+       }
+end:
+       return ret;
+}
+
+int relayd_trace_chunk_exists(struct lttcomm_relayd_sock *sock,
+               uint64_t chunk_id, bool *chunk_exists)
+{
+       int ret = 0;
+       struct lttcomm_relayd_trace_chunk_exists msg = {};
+       struct lttcomm_relayd_trace_chunk_exists_reply reply = {};
+
+       msg = (typeof(msg)){
+                       .chunk_id = htobe64(chunk_id),
+       };
+
+       ret = send_command(sock, RELAYD_TRACE_CHUNK_EXISTS, &msg, sizeof(msg),
+                       0);
+       if (ret < 0) {
+               ERR("Failed to send trace chunk exists command to relay daemon");
+               goto end;
+       }
+
+       ret = recv_reply(sock, &reply, sizeof(reply));
+       if (ret < 0) {
+               ERR("Failed to receive relay daemon trace chunk close command reply");
+               goto end;
+       }
+
+       reply.generic.ret_code = be32toh(reply.generic.ret_code);
+       if (reply.generic.ret_code != LTTNG_OK) {
+               ret = -1;
+               ERR("Relayd trace chunk close replied error %d",
+                               reply.generic.ret_code);
+       } else {
+               ret = 0;
+               DBG("Relayd successfully checked trace chunk existence: chunk_id = %" PRIu64
+                               ", exists = %s", chunk_id,
+                               reply.trace_chunk_exists ? "true" : "false");
+               *chunk_exists = !!reply.trace_chunk_exists;
+       }
+end:
        return ret;
 }
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