From: Mathieu Desnoyers Date: Tue, 2 Jul 2013 19:14:02 +0000 (-0400) Subject: Fix: consumer_add_relayd_socket() report errors to sessiond X-Git-Tag: v2.2.1~9 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e124929f95bb048efb6fc315f747ea2829109beb;p=lttng-tools.git Fix: consumer_add_relayd_socket() report errors to sessiond Wait until the side-effect to relayd is actually performed before replying that "all is fine" to sessiond. Signed-off-by: Mathieu Desnoyers --- diff --git a/src/common/consumer.c b/src/common/consumer.c index a1a99b401..560ec6cd0 100644 --- a/src/common/consumer.c +++ b/src/common/consumer.c @@ -3092,8 +3092,9 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, /* Not found. Allocate one. */ relayd = consumer_allocate_relayd_sock_pair(net_seq_idx); if (relayd == NULL) { - ret_code = LTTCOMM_CONSUMERD_ENOMEM; ret = -ENOMEM; + ret_code = LTTCOMM_CONSUMERD_ENOMEM; + goto error; } else { relayd->sessiond_session_id = sessiond_id; relayd_created = 1; @@ -3112,23 +3113,23 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, } /* First send a status message before receiving the fds. */ - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0 || ret_code != LTTNG_OK) { + ret = consumer_send_status_msg(sock, LTTNG_OK); + if (ret < 0) { /* Somehow, the session daemon is not responding anymore. */ - goto error; + lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); + goto error_nosignal; } /* Poll on consumer socket. */ if (lttng_consumer_poll_socket(consumer_sockpoll) < 0) { lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); ret = -EINTR; - goto error; + goto error_nosignal; } /* Get relayd socket from session daemon */ ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); if (ret != sizeof(fd)) { - ret_code = LTTCOMM_CONSUMERD_ERROR_RECV_FD; ret = -1; fd = -1; /* Just in case it gets set with an invalid value. */ @@ -3142,18 +3143,7 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, * issue when reaching the fd limit. */ lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); - - /* - * This code path MUST continue to the consumer send status message so - * we can send the error to the thread expecting a reply. The above - * call will make everything stop. - */ - } - - /* We have the fds without error. Send status back. */ - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0 || ret_code != LTTNG_OK) { - /* Somehow, the session daemon is not responding anymore. */ + ret_code = LTTCOMM_CONSUMERD_ERROR_RECV_FD; goto error; } @@ -3165,6 +3155,7 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, ret = lttcomm_create_sock(&relayd->control_sock.sock); /* Handle create_sock error. */ if (ret < 0) { + ret_code = LTTCOMM_CONSUMERD_ENOMEM; goto error; } /* @@ -3203,6 +3194,7 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, */ (void) relayd_close(&relayd->control_sock); (void) relayd_close(&relayd->data_sock); + ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; goto error; } @@ -3213,6 +3205,7 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, ret = lttcomm_create_sock(&relayd->data_sock.sock); /* Handle create_sock error. */ if (ret < 0) { + ret_code = LTTCOMM_CONSUMERD_ENOMEM; goto error; } /* @@ -3234,6 +3227,7 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, default: ERR("Unknown relayd socket type (%d)", sock_type); ret = -1; + ret_code = LTTCOMM_CONSUMERD_FATAL; goto error; } @@ -3241,6 +3235,14 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, sock_type == LTTNG_STREAM_CONTROL ? "control" : "data", relayd->net_seq_idx, fd); + /* We successfully added the socket. Send status back. */ + ret = consumer_send_status_msg(sock, ret_code); + if (ret < 0) { + /* Somehow, the session daemon is not responding anymore. */ + lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); + goto error_nosignal; + } + /* * Add relayd socket pair to consumer data hashtable. If object already * exists or on error, the function gracefully returns. @@ -3251,6 +3253,11 @@ int consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, return 0; error: + if (consumer_send_status_msg(sock, ret_code) < 0) { + lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); + } + +error_nosignal: /* Close received socket if valid. */ if (fd >= 0) { if (close(fd)) { diff --git a/src/common/sessiond-comm/sessiond-comm.c b/src/common/sessiond-comm/sessiond-comm.c index 738362c1a..9a13f4148 100644 --- a/src/common/sessiond-comm/sessiond-comm.c +++ b/src/common/sessiond-comm/sessiond-comm.c @@ -64,6 +64,7 @@ static const char *lttcomm_readable_code[] = { [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ENOMEM) ] = "Consumer is out of memory", [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_METADATA) ] = "Error with metadata", [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_FATAL) ] = "Fatal error", + [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_RELAYD_FAIL) ] = "Error on remote relayd", /* Last element */ [ LTTCOMM_ERR_INDEX(LTTCOMM_NR) ] = "Unknown error code" diff --git a/src/common/sessiond-comm/sessiond-comm.h b/src/common/sessiond-comm/sessiond-comm.h index 64c8d1879..0c49a3c53 100644 --- a/src/common/sessiond-comm/sessiond-comm.h +++ b/src/common/sessiond-comm/sessiond-comm.h @@ -119,6 +119,7 @@ enum lttcomm_return_code { LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */ LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */ LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */ + LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */ /* MUST be last element */ LTTCOMM_NR, /* Last element */