X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Flib%2Flttng-ctl%2Flttng-ctl.c;h=47887c0293645b61aa324e2164c10d86c1cc4b30;hp=91d6109e5383b77f8013d67aad18b374d4e131ba;hb=1cbd136b2479ef142bfb339b13d3d25aa772dda5;hpb=fbc9f37df245d544a7705ba576297df791220b44 diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c index 91d6109e5..47887c029 100644 --- a/src/lib/lttng-ctl/lttng-ctl.c +++ b/src/lib/lttng-ctl/lttng-ctl.c @@ -11,21 +11,22 @@ */ #define _LGPL_SOURCE -#include #include #include #include #include #include +#include +#include #include #include #include #include -#include #include -#include +#include #include +#include #include #include #include @@ -34,20 +35,20 @@ #include #include #include +#include #include #include +#include #include #include #include #include #include -#include +#include "lttng-ctl-helper.h" #include #include -#include #include -#include "lttng-ctl-helper.h" #define COPY_DOMAIN_PACKED(dst, src) \ do { \ @@ -76,27 +77,11 @@ int lttng_opt_quiet; int lttng_opt_verbose; int lttng_opt_mi; -/* - * Copy string from src to dst and enforce null terminated byte. - */ -LTTNG_HIDDEN -void lttng_ctl_copy_string(char *dst, const char *src, size_t len) -{ - if (src && dst) { - strncpy(dst, src, len); - /* Enforce the NULL terminated byte */ - dst[len - 1] = '\0'; - } else if (dst) { - dst[0] = '\0'; - } -} - /* * Copy domain to lttcomm_session_msg domain. * * If domain is unknown, default domain will be the kernel. */ -LTTNG_HIDDEN void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, struct lttng_domain *src) { @@ -131,7 +116,8 @@ static int send_session_msg(struct lttcomm_session_msg *lsm) goto end; } - DBG("LSM cmd type : %d", lsm->cmd_type); + DBG("LSM cmd type: '%s' (%d)", lttcomm_sessiond_command_str(lsm->cmd_type), + lsm->cmd_type); ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm, sizeof(struct lttcomm_session_msg)); @@ -211,7 +197,7 @@ static int recv_data_sessiond(void *buf, size_t len) { int ret; - assert(len > 0); + LTTNG_ASSERT(len > 0); if (!connected) { ret = -LTTNG_ERR_NO_SESSIOND; @@ -258,7 +244,6 @@ end: * * If yes return 1, else return -1. */ -LTTNG_HIDDEN int lttng_check_tracing_group(void) { gid_t *grp_list, tracing_gid; @@ -401,9 +386,14 @@ static int set_session_daemon_path(void) in_tgroup = lttng_check_tracing_group(); } - if ((uid == 0) || in_tgroup) { - lttng_ctl_copy_string(sessiond_sock_path, - DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path)); + if ((uid == 0) || in_tgroup == 1) { + const int ret = lttng_strncpy(sessiond_sock_path, + DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, + sizeof(sessiond_sock_path)); + + if (ret) { + goto error; + } } if (uid != 0) { @@ -443,7 +433,7 @@ error: * * On success, return the socket's file descriptor. On error, return -1. */ -LTTNG_HIDDEN int connect_sessiond(void) +int connect_sessiond(void) { int ret; @@ -542,7 +532,6 @@ end: * * Return size of data (only payload, not header) or a negative error code. */ -LTTNG_HIDDEN int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, const int *fds, size_t nb_fd, const void *vardata, size_t vardata_len, void **user_payload_buf, @@ -614,7 +603,6 @@ end: return ret; } -LTTNG_HIDDEN int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, struct lttng_payload *reply) { @@ -622,8 +610,8 @@ int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, struct lttcomm_lttng_msg llm; const int fd_count = lttng_payload_view_get_fd_handle_count(message); - assert(reply->buffer.size == 0); - assert(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); + LTTNG_ASSERT(reply->buffer.size == 0); + LTTNG_ASSERT(lttng_dynamic_pointer_array_get_count(&reply->_fd_handles) == 0); ret = connect_sessiond(); if (ret < 0) { @@ -662,7 +650,12 @@ int lttng_ctl_ask_sessiond_payload(struct lttng_payload_view *message, /* Check error code if OK */ if (llm.ret_code != LTTNG_OK) { - ret = -llm.ret_code; + if (llm.ret_code < LTTNG_OK || llm.ret_code >= LTTNG_ERR_NR) { + /* Invalid error code received. */ + ret = -LTTNG_ERR_UNK; + } else { + ret = -llm.ret_code; + } goto end; } @@ -714,6 +707,7 @@ end: struct lttng_handle *lttng_create_handle(const char *session_name, struct lttng_domain *domain) { + int ret; struct lttng_handle *handle = NULL; handle = zmalloc(sizeof(struct lttng_handle)); @@ -723,8 +717,11 @@ struct lttng_handle *lttng_create_handle(const char *session_name, } /* Copy session name */ - lttng_ctl_copy_string(handle->session_name, session_name, - sizeof(handle->session_name)); + ret = lttng_strncpy(handle->session_name, session_name ? : "", + sizeof(handle->session_name)); + if (ret) { + goto error; + } /* Copy lttng domain or leave initialized to 0. */ if (domain) { @@ -733,6 +730,9 @@ struct lttng_handle *lttng_create_handle(const char *session_name, end: return handle; +error: + free(handle); + return NULL; } /* @@ -751,22 +751,35 @@ void lttng_destroy_handle(struct lttng_handle *handle) int lttng_register_consumer(struct lttng_handle *handle, const char *socket_path) { + int ret; struct lttcomm_session_msg lsm; if (handle == NULL || socket_path == NULL) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto end; } memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_REGISTER_CONSUMER; - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + COPY_DOMAIN_PACKED(lsm.domain, handle->domain); - lttng_ctl_copy_string(lsm.u.reg.path, socket_path, - sizeof(lsm.u.reg.path)); + ret = lttng_strncpy(lsm.u.reg.path, socket_path, + sizeof(lsm.u.reg.path)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } - return lttng_ctl_ask_sessiond(&lsm, NULL); + ret = lttng_ctl_ask_sessiond(&lsm, NULL); +end: + return ret; } /* @@ -776,19 +789,27 @@ int lttng_register_consumer(struct lttng_handle *handle, */ int lttng_start_tracing(const char *session_name) { + int ret; struct lttcomm_session_msg lsm; if (session_name == NULL) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto end; } memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_START_TRACE; - lttng_ctl_copy_string(lsm.session.name, session_name, - sizeof(lsm.session.name)); + ret = lttng_strncpy(lsm.session.name, session_name, + sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } - return lttng_ctl_ask_sessiond(&lsm, NULL); + ret = lttng_ctl_ask_sessiond(&lsm, NULL); +end: + return ret; } /* @@ -800,14 +821,19 @@ static int _lttng_stop_tracing(const char *session_name, int wait) struct lttcomm_session_msg lsm; if (session_name == NULL) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto error; } memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_STOP_TRACE; - lttng_ctl_copy_string(lsm.session.name, session_name, - sizeof(lsm.session.name)); + ret = lttng_strncpy(lsm.session.name, session_name, + sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; + } ret = lttng_ctl_ask_sessiond(&lsm, NULL); if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { @@ -884,17 +910,20 @@ int lttng_add_context(struct lttng_handle *handle, lsm.cmd_type = LTTNG_ADD_CONTEXT; /* If no channel name, send empty string. */ - if (channel_name == NULL) { - lttng_ctl_copy_string(lsm.u.context.channel_name, "", - sizeof(lsm.u.context.channel_name)); - } else { - lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name, - sizeof(lsm.u.context.channel_name)); + ret = lttng_strncpy(lsm.u.context.channel_name, channel_name ?: "", + sizeof(lsm.u.context.channel_name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; } COPY_DOMAIN_PACKED(lsm.domain, handle->domain); - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { size_t provider_len, ctx_len; @@ -988,7 +1017,7 @@ static char *set_agent_filter(const char *filter, struct lttng_event *ev) int err; char *agent_filter = NULL; - assert(ev); + LTTNG_ASSERT(ev); /* Don't add filter for the '*' event. */ if (strcmp(ev->name, "*") != 0) { @@ -1090,25 +1119,30 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle, memset(&lsm, 0, sizeof(lsm)); /* If no channel name, send empty string. */ - if (channel_name == NULL) { - lttng_ctl_copy_string(lsm.u.enable.channel_name, "", - sizeof(lsm.u.enable.channel_name)); - } else { - lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name, - sizeof(lsm.u.enable.channel_name)); + ret = lttng_strncpy(lsm.u.enable.channel_name, channel_name ?: "", + sizeof(lsm.u.enable.channel_name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; } lsm.cmd_type = LTTNG_ENABLE_EVENT; if (ev->name[0] == '\0') { - /* Enable all events */ - lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name)); + /* Enable all events. */ + ret = lttng_strncpy(ev->name, "*", sizeof(ev->name)); + LTTNG_ASSERT(ret == 0); } COPY_DOMAIN_PACKED(lsm.domain, handle->domain); memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event)); - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; + } + lsm.u.enable.exclusion_count = exclusion_count; lsm.u.enable.bytecode_len = 0; @@ -1166,7 +1200,7 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle, for (i = 0; i < exclusion_count; i++) { size_t exclusion_len; - exclusion_len = lttng_strnlen(*(exclusion_list + i), + exclusion_len = lttng_strnlen(exclusion_list[i], LTTNG_SYMBOL_NAME_LEN); if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { /* Exclusion is not NULL-terminated. */ @@ -1175,7 +1209,17 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle, } ret = lttng_dynamic_buffer_append(&payload.buffer, - *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN); + exclusion_list[i], exclusion_len); + if (ret) { + goto mem_error; + } + + /* + * Padding the rest of the entry with zeros. Every exclusion + * entries take LTTNG_SYMBOL_NAME_LEN bytes in the buffer. + */ + ret = lttng_dynamic_buffer_set_size(&payload.buffer, + LTTNG_SYMBOL_NAME_LEN * (i + 1)); if (ret) { goto mem_error; } @@ -1231,17 +1275,17 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle, goto mem_error; } - assert(fd_count == 0 || fd_count == 1); + LTTNG_ASSERT(fd_count == 0 || fd_count == 1); if (fd_count == 1) { - struct fd_handle *handle = + struct fd_handle *h = lttng_payload_view_pop_fd_handle(&view); - if (!handle) { + if (!h) { goto mem_error; } - fd_to_send = fd_handle_get_fd(handle); - fd_handle_put(handle); + fd_to_send = fd_handle_get_fd(h); + fd_handle_put(h); } ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, @@ -1312,12 +1356,11 @@ int lttng_disable_event_ext(struct lttng_handle *handle, memset(&lsm, 0, sizeof(lsm)); /* If no channel name, send empty string. */ - if (channel_name == NULL) { - lttng_ctl_copy_string(lsm.u.disable.channel_name, "", - sizeof(lsm.u.disable.channel_name)); - } else { - lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name, - sizeof(lsm.u.disable.channel_name)); + ret = lttng_strncpy(lsm.u.disable.channel_name, channel_name ?: "", + sizeof(lsm.u.disable.channel_name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; } lsm.cmd_type = LTTNG_DISABLE_EVENT; @@ -1325,8 +1368,13 @@ int lttng_disable_event_ext(struct lttng_handle *handle, COPY_DOMAIN_PACKED(lsm.domain, handle->domain); memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event)); - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; + } + lsm.u.disable.bytecode_len = 0; /* @@ -1447,13 +1495,21 @@ ask_sessiond: int lttng_disable_event(struct lttng_handle *handle, const char *name, const char *channel_name) { + int ret; struct lttng_event ev; memset(&ev, 0, sizeof(ev)); ev.loglevel = -1; ev.type = LTTNG_EVENT_ALL; - lttng_ctl_copy_string(ev.name, name, sizeof(ev.name)); - return lttng_disable_event_ext(handle, &ev, channel_name, NULL); + ret = lttng_strncpy(ev.name, name ?: "", sizeof(ev.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + ret = lttng_disable_event_ext(handle, &ev, channel_name, NULL); +end: + return ret; } struct lttng_channel *lttng_channel_create(struct lttng_domain *domain) @@ -1524,6 +1580,7 @@ void lttng_channel_destroy(struct lttng_channel *channel) int lttng_enable_channel(struct lttng_handle *handle, struct lttng_channel *in_chan) { + int ret; struct lttcomm_session_msg lsm; size_t total_buffer_size_needed_per_cpu = 0; @@ -1574,10 +1631,16 @@ int lttng_enable_channel(struct lttng_handle *handle, lsm.cmd_type = LTTNG_ENABLE_CHANNEL; COPY_DOMAIN_PACKED(lsm.domain, handle->domain); - lttng_ctl_copy_string(lsm.session.name, handle->session_name, - sizeof(lsm.session.name)); + ret = lttng_strncpy(lsm.session.name, handle->session_name, + sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } - return lttng_ctl_ask_sessiond(&lsm, NULL); + ret = lttng_ctl_ask_sessiond(&lsm, NULL); +end: + return ret; } /* @@ -1586,6 +1649,7 @@ int lttng_enable_channel(struct lttng_handle *handle, */ int lttng_disable_channel(struct lttng_handle *handle, const char *name) { + int ret; struct lttcomm_session_msg lsm; /* Safety check. Both are mandatory. */ @@ -1597,15 +1661,25 @@ int lttng_disable_channel(struct lttng_handle *handle, const char *name) lsm.cmd_type = LTTNG_DISABLE_CHANNEL; - lttng_ctl_copy_string(lsm.u.disable.channel_name, name, + ret = lttng_strncpy(lsm.u.disable.channel_name, name, sizeof(lsm.u.disable.channel_name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } COPY_DOMAIN_PACKED(lsm.domain, handle->domain); - lttng_ctl_copy_string(lsm.session.name, handle->session_name, - sizeof(lsm.session.name)); + ret = lttng_strncpy(lsm.session.name, handle->session_name, + sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } - return lttng_ctl_ask_sessiond(&lsm, NULL); + ret = lttng_ctl_ask_sessiond(&lsm, NULL); +end: + return ret; } /* @@ -1975,7 +2049,7 @@ int lttng_destroy_session(const char *session_name) ret = (int) -ret_code; goto end; } - assert(handle); + LTTNG_ASSERT(handle); /* Block until the completion of the destruction of the session. */ status = lttng_destruction_handle_wait_for_completion(handle, -1); @@ -2003,7 +2077,7 @@ int lttng_destroy_session_no_wait(const char *session_name) enum lttng_error_code ret_code; ret_code = lttng_destroy_session_ext(session_name, NULL); - return ret_code == LTTNG_OK ? ret_code : -ret_code; + return ret_code == LTTNG_OK ? 0 : -ret_code; } /* @@ -2083,6 +2157,7 @@ end: int lttng_set_session_shm_path(const char *session_name, const char *shm_path) { + int ret; struct lttcomm_session_msg lsm; if (session_name == NULL) { @@ -2092,12 +2167,23 @@ int lttng_set_session_shm_path(const char *session_name, memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH; - lttng_ctl_copy_string(lsm.session.name, session_name, + ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); - lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path, + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + ret = lttng_strncpy(lsm.u.set_shm_path.shm_path, shm_path ?: "", sizeof(lsm.u.set_shm_path.shm_path)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } - return lttng_ctl_ask_sessiond(&lsm, NULL); + ret = lttng_ctl_ask_sessiond(&lsm, NULL); +end: + return ret; } /* @@ -2113,21 +2199,28 @@ int lttng_list_domains(const char *session_name, struct lttcomm_session_msg lsm; if (session_name == NULL) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto error; } memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_LIST_DOMAINS; - lttng_ctl_copy_string(lsm.session.name, session_name, + ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; + } ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains); if (ret < 0) { - return ret; + goto error; } return ret / sizeof(struct lttng_domain); +error: + return ret; } /* @@ -2153,8 +2246,12 @@ int lttng_list_channels(struct lttng_handle *handle, memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_LIST_CHANNELS; - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } COPY_DOMAIN_PACKED(lsm.domain, handle->domain); @@ -2222,10 +2319,20 @@ int lttng_list_events(struct lttng_handle *handle, lttng_payload_init(&payload_copy); lsm.cmd_type = LTTNG_LIST_EVENTS; - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); - lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name, + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + + ret = lttng_strncpy(lsm.u.list.channel_name, channel_name, sizeof(lsm.u.list.channel_name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } + COPY_DOMAIN_PACKED(lsm.domain, handle->domain); ret = lttng_ctl_ask_sessiond_payload(&lsm_view, &payload); @@ -2350,7 +2457,7 @@ int lttng_list_events(struct lttng_handle *handle, storage_req += ext_comm->nb_exclusions * LTTNG_SYMBOL_NAME_LEN; /* Padding to ensure the flat probe is aligned. */ - storage_req = ALIGN_TO(storage_req, sizeof(uint64_t)); + storage_req = lttng_align_ceil(storage_req, sizeof(uint64_t)); storage_req += probe_storage_req; } } @@ -2441,7 +2548,7 @@ int lttng_list_events(struct lttng_handle *handle, /* Insert padding to align to 64-bits. */ ret = lttng_dynamic_buffer_set_size(&listing, - ALIGN_TO(listing.size, + lttng_align_ceil(listing.size, sizeof(uint64_t))); if (ret) { ret = -LTTNG_ERR_NOMEM; @@ -2772,7 +2879,7 @@ int lttng_session_daemon_alive(void) * No socket path set. Weird error which means the constructor * was not called. */ - assert(0); + abort(); } ret = try_connect_sessiond(sessiond_sock_path); @@ -2799,20 +2906,27 @@ int lttng_set_consumer_url(struct lttng_handle *handle, struct lttng_uri *uris = NULL; if (handle == NULL || (control_url == NULL && data_url == NULL)) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto error; } memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_SET_CONSUMER_URI; - lttng_ctl_copy_string(lsm.session.name, handle->session_name, + ret = lttng_strncpy(lsm.session.name, handle->session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto error; + } + COPY_DOMAIN_PACKED(lsm.domain, handle->domain); size = uri_parse_str_urls(control_url, data_url, &uris); if (size < 0) { - return -LTTNG_ERR_INVALID; + ret = -LTTNG_ERR_INVALID; + goto error; } lsm.u.uri.size = size; @@ -2821,6 +2935,7 @@ int lttng_set_consumer_url(struct lttng_handle *handle, sizeof(struct lttng_uri) * size, NULL); free(uris); +error: return ret; } @@ -2871,8 +2986,12 @@ int lttng_data_pending(const char *session_name) memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_DATA_PENDING; - lttng_ctl_copy_string(lsm.session.name, session_name, + ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending); if (ret < 0) { @@ -2910,8 +3029,12 @@ int lttng_regenerate_metadata(const char *session_name) memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_REGENERATE_METADATA; - lttng_ctl_copy_string(lsm.session.name, session_name, + ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } ret = lttng_ctl_ask_sessiond(&lsm, NULL); if (ret < 0) { @@ -2948,8 +3071,12 @@ int lttng_regenerate_statedump(const char *session_name) memset(&lsm, 0, sizeof(lsm)); lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP; - lttng_ctl_copy_string(lsm.session.name, session_name, + ret = lttng_strncpy(lsm.session.name, session_name, sizeof(lsm.session.name)); + if (ret) { + ret = -LTTNG_ERR_INVALID; + goto end; + } ret = lttng_ctl_ask_sessiond(&lsm, NULL); if (ret < 0) { @@ -2961,21 +3088,26 @@ end: return ret; } -int lttng_register_trigger(struct lttng_trigger *trigger) +static +int _lttng_register_trigger(struct lttng_trigger *trigger, const char *name, + bool generate_name) { int ret; struct lttcomm_session_msg lsm = { .cmd_type = LTTNG_REGISTER_TRIGGER, + .u.trigger.is_trigger_anonymous = !name && !generate_name, }; struct lttcomm_session_msg *message_lsm; struct lttng_payload message; struct lttng_payload reply; struct lttng_trigger *reply_trigger = NULL; + enum lttng_domain_type domain_type; const struct lttng_credentials user_creds = { .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), .gid = LTTNG_OPTIONAL_INIT_UNSET, }; - + const char *unused_trigger_name = NULL; + enum lttng_trigger_status trigger_status; lttng_payload_init(&message); lttng_payload_init(&reply); @@ -2985,6 +3117,21 @@ int lttng_register_trigger(struct lttng_trigger *trigger) goto end; } + trigger_status = lttng_trigger_get_name(trigger, &unused_trigger_name); + if (trigger_status != LTTNG_TRIGGER_STATUS_UNSET) { + /* Re-using already registered trigger. */ + ret = -LTTNG_ERR_INVALID; + goto end; + } + + if (name) { + trigger_status = lttng_trigger_set_name(trigger, name); + if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { + ret = -LTTNG_ERR_NOMEM; + goto end; + } + } + if (!trigger->creds.uid.is_set) { /* Use the client's credentials as the trigger credentials. */ lttng_trigger_set_credentials(trigger, &user_creds); @@ -3005,34 +3152,39 @@ int lttng_register_trigger(struct lttng_trigger *trigger) if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { if (lttng_credentials_get_uid(&user_creds) != 0) { ret = -LTTNG_ERR_EPERM; - goto end; + goto end_unset_name; } } } if (!lttng_trigger_validate(trigger)) { ret = -LTTNG_ERR_INVALID_TRIGGER; - goto end; + goto end_unset_name; } + domain_type = lttng_trigger_get_underlying_domain_type_restriction( + trigger); + + lsm.domain.type = domain_type; + ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); if (ret) { ret = -LTTNG_ERR_NOMEM; - goto end; + goto end_unset_name; } - /* - * This is needed to populate the trigger object size for the command - * header. - */ - message_lsm = (struct lttcomm_session_msg *) message.buffer.data; - ret = lttng_trigger_serialize(trigger, &message); if (ret < 0) { ret = -LTTNG_ERR_UNK; - goto end; + goto end_unset_name; } + /* + * This is needed to populate the trigger object size for the command + * header. + */ + message_lsm = (struct lttcomm_session_msg *) message.buffer.data; + message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); { @@ -3044,7 +3196,7 @@ int lttng_register_trigger(struct lttng_trigger *trigger) &message_view); ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); if (ret < 0) { - goto end; + goto end_unset_name; } } @@ -3056,18 +3208,27 @@ int lttng_register_trigger(struct lttng_trigger *trigger) ret = lttng_trigger_create_from_payload( &reply_view, &reply_trigger); if (ret < 0) { - ret = -LTTNG_ERR_FATAL; - goto end; + ret = -LTTNG_ERR_INVALID_PROTOCOL; + goto end_unset_name; } } - ret = lttng_trigger_assign_name(trigger, reply_trigger); - if (ret < 0) { - ret = -LTTNG_ERR_FATAL; - goto end; + if (name || generate_name) { + ret = lttng_trigger_assign_name(trigger, reply_trigger); + if (ret < 0) { + ret = -LTTNG_ERR_NOMEM; + goto end; + } } ret = 0; + goto end; + +end_unset_name: + trigger_status = lttng_trigger_set_name(trigger, NULL); + if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { + ret = -LTTNG_ERR_UNK; + } end: lttng_payload_reset(&message); lttng_payload_reset(&reply); @@ -3075,13 +3236,114 @@ end: return ret; } -int lttng_unregister_trigger(struct lttng_trigger *trigger) +int lttng_register_trigger(struct lttng_trigger *trigger) +{ + /* Register an anonymous trigger. */ + return _lttng_register_trigger(trigger, NULL, false); +} + +enum lttng_error_code lttng_register_trigger_with_name( + struct lttng_trigger *trigger, const char *name) +{ + const int ret = _lttng_register_trigger(trigger, name, false); + + return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; +} + +enum lttng_error_code lttng_register_trigger_with_automatic_name( + struct lttng_trigger *trigger) +{ + const int ret = _lttng_register_trigger(trigger, false, true); + + return ret == 0 ? LTTNG_OK : (enum lttng_error_code) -ret; +} + +enum lttng_error_code lttng_error_query_execute( + const struct lttng_error_query *query, + const struct lttng_endpoint *endpoint, + struct lttng_error_query_results **results) +{ + int ret; + enum lttng_error_code ret_code; + struct lttcomm_session_msg lsm = { + .cmd_type = LTTNG_EXECUTE_ERROR_QUERY, + }; + struct lttng_payload message; + struct lttng_payload reply; + struct lttcomm_session_msg *message_lsm; + + lttng_payload_init(&message); + lttng_payload_init(&reply); + + if (!query || !results) { + ret_code = LTTNG_ERR_INVALID; + goto end; + } + + if (endpoint != lttng_session_daemon_command_endpoint) { + ret_code = LTTNG_ERR_INVALID_ERROR_QUERY_TARGET; + goto end; + } + + ret = lttng_dynamic_buffer_append(&message.buffer, &lsm, sizeof(lsm)); + if (ret) { + ret_code = LTTNG_ERR_NOMEM; + goto end; + } + + ret = lttng_error_query_serialize(query, &message); + if (ret) { + ret_code = LTTNG_ERR_UNK; + goto end; + } + + message_lsm = (struct lttcomm_session_msg *) message.buffer.data; + message_lsm->u.error_query.length = + (uint32_t) message.buffer.size - sizeof(lsm); + + { + struct lttng_payload_view message_view = + lttng_payload_view_from_payload( + &message, 0, -1); + + message_lsm->fd_count = lttng_payload_view_get_fd_handle_count( + &message_view); + ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply); + if (ret < 0) { + ret_code = -ret; + goto end; + } + } + + { + ssize_t reply_create_ret; + struct lttng_payload_view reply_view = + lttng_payload_view_from_payload( + &reply, 0, reply.buffer.size); + + reply_create_ret = lttng_error_query_results_create_from_payload( + &reply_view, results); + if (reply_create_ret < 0) { + ret_code = LTTNG_ERR_INVALID_PROTOCOL; + goto end; + } + } + + ret_code = LTTNG_OK; +end: + lttng_payload_reset(&message); + lttng_payload_reset(&reply); + return ret_code; +} + +int lttng_unregister_trigger(const struct lttng_trigger *trigger) { int ret; struct lttcomm_session_msg lsm; struct lttcomm_session_msg *message_lsm; struct lttng_payload message; struct lttng_payload reply; + struct lttng_trigger *copy = NULL; const struct lttng_credentials user_creds = { .uid = LTTNG_OPTIONAL_INIT_VALUE(geteuid()), .gid = LTTNG_OPTIONAL_INIT_UNSET, @@ -3095,9 +3357,15 @@ int lttng_unregister_trigger(struct lttng_trigger *trigger) goto end; } - if (!trigger->creds.uid.is_set) { - /* Use the client's credentials as the trigger credentials. */ - lttng_trigger_set_credentials(trigger, &user_creds); + copy = lttng_trigger_copy(trigger); + if (!copy) { + ret = -LTTNG_ERR_UNK; + goto end; + } + + if (!copy->creds.uid.is_set) { + /* Use the client credentials as the trigger credentials */ + lttng_trigger_set_credentials(copy, &user_creds); } else { /* * Validate that either the current trigger credentials and the @@ -3110,8 +3378,7 @@ int lttng_unregister_trigger(struct lttng_trigger *trigger) * "safety" checks. */ const struct lttng_credentials *trigger_creds = - lttng_trigger_get_credentials(trigger); - + lttng_trigger_get_credentials(copy); if (!lttng_credentials_is_equal_uid(trigger_creds, &user_creds)) { if (lttng_credentials_get_uid(&user_creds) != 0) { ret = -LTTNG_ERR_EPERM; @@ -3120,7 +3387,7 @@ int lttng_unregister_trigger(struct lttng_trigger *trigger) } } - if (!lttng_trigger_validate(trigger)) { + if (!lttng_trigger_validate(copy)) { ret = -LTTNG_ERR_INVALID_TRIGGER; goto end; } @@ -3134,18 +3401,18 @@ int lttng_unregister_trigger(struct lttng_trigger *trigger) goto end; } + ret = lttng_trigger_serialize(copy, &message); + if (ret < 0) { + ret = -LTTNG_ERR_UNK; + goto end; + } + /* * This is needed to populate the trigger object size for the command * header and number of fds sent. */ message_lsm = (struct lttcomm_session_msg *) message.buffer.data; - ret = lttng_trigger_serialize(trigger, &message); - if (ret < 0) { - ret = -LTTNG_ERR_UNK; - goto end; - } - message_lsm->u.trigger.length = (uint32_t) message.buffer.size - sizeof(lsm); { @@ -3168,6 +3435,7 @@ int lttng_unregister_trigger(struct lttng_trigger *trigger) ret = 0; end: + lttng_trigger_destroy(copy); lttng_payload_reset(&message); lttng_payload_reset(&reply); return ret;