X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fcommon%2Frunas.c;h=adbbe3e97a8446b514f5ac7ec308f0d217730115;hb=f72bb42fe5fb36e43df18f9df6d0d389db699170;hp=bed25a46368d61d875939acd1461e0b98a3af4cb;hpb=241e0a5ac6da55b41adaf516fbd36af332d94b3d;p=lttng-tools.git diff --git a/src/common/runas.c b/src/common/runas.c index bed25a463..adbbe3e97 100644 --- a/src/common/runas.c +++ b/src/common/runas.c @@ -32,6 +32,7 @@ #include #include +#include #include #include #include @@ -71,6 +72,11 @@ struct run_as_extract_elf_symbol_offset_data { char function[LTTNG_SYMBOL_NAME_LEN]; }; +struct run_as_extract_sdt_probe_offsets_data { + char probe_name[LTTNG_SYMBOL_NAME_LEN]; + char provider_name[LTTNG_SYMBOL_NAME_LEN]; +}; + struct run_as_mkdir_ret { int ret; }; @@ -91,6 +97,11 @@ struct run_as_extract_elf_symbol_offset_ret { uint64_t offset; }; +struct run_as_extract_sdt_probe_offsets_ret { + uint32_t num_offset; + uint64_t offsets[LTTNG_KERNEL_MAX_UPROBE_NUM]; +}; + enum run_as_cmd { RUN_AS_MKDIR, RUN_AS_OPEN, @@ -98,6 +109,7 @@ enum run_as_cmd { RUN_AS_RMDIR_RECURSIVE, RUN_AS_MKDIR_RECURSIVE, RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET, + RUN_AS_EXTRACT_SDT_PROBE_OFFSETS, }; struct run_as_data { @@ -109,6 +121,7 @@ struct run_as_data { struct run_as_unlink_data unlink; struct run_as_rmdir_recursive_data rmdir_recursive; struct run_as_extract_elf_symbol_offset_data extract_elf_symbol_offset; + struct run_as_extract_sdt_probe_offsets_data extract_sdt_probe_offsets; } u; uid_t uid; gid_t gid; @@ -137,6 +150,7 @@ struct run_as_ret { struct run_as_unlink_ret unlink; struct run_as_rmdir_recursive_ret rmdir_recursive; struct run_as_extract_elf_symbol_offset_ret extract_elf_symbol_offset; + struct run_as_extract_sdt_probe_offsets_ret extract_sdt_probe_offsets; } u; int _errno; bool _error; @@ -204,7 +218,7 @@ int _open(struct run_as_data *data, struct run_as_ret *ret_value) ret_value->u.open.ret = open(data->u.open.path, data->u.open.flags, data->u.open.mode); ret_value->fd = ret_value->u.open.ret; ret_value->_errno = errno; - ret_value->_error = (ret_value->u.open.ret) ? true : false; + ret_value->_error = ret_value->u.open.ret < 0; return ret_value->u.open.ret; } @@ -226,6 +240,7 @@ int _rmdir_recursive(struct run_as_data *data, struct run_as_ret *ret_value) return ret_value->u.rmdir_recursive.ret; } +#ifdef HAVE_ELF_H static int _extract_elf_symbol_offset(struct run_as_data *data, struct run_as_ret *ret_value) @@ -244,6 +259,63 @@ int _extract_elf_symbol_offset(struct run_as_data *data, return ret; } +static +int _extract_sdt_probe_offsets(struct run_as_data *data, + struct run_as_ret *ret_value) +{ + int ret = 0; + uint64_t *offsets = NULL; + uint32_t num_offset; + + ret_value->_error = false; + + /* On success, this call allocates the offsets paramater. */ + ret = lttng_elf_get_sdt_probe_offsets(data->fd, + data->u.extract_sdt_probe_offsets.provider_name, + data->u.extract_sdt_probe_offsets.probe_name, + &offsets, &num_offset); + + if (ret) { + DBG("Failed to extract SDT probe offsets"); + ret_value->_error = true; + goto end; + } + + if (num_offset <= 0 || num_offset > LTTNG_KERNEL_MAX_UPROBE_NUM) { + DBG("Wrong number of probes."); + ret = -1; + ret_value->_error = true; + goto free_offset; + } + + /* Copy the content of the offsets array to the ret struct. */ + memcpy(ret_value->u.extract_sdt_probe_offsets.offsets, + offsets, num_offset * sizeof(uint64_t)); + + ret_value->u.extract_sdt_probe_offsets.num_offset = num_offset; + +free_offset: + free(offsets); +end: + return ret; +} +#else +static +int _extract_elf_symbol_offset(struct run_as_data *data, + struct run_as_ret *ret_value) +{ + ERR("Unimplemented runas command RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET"); + return -1; +} + +static +int _extract_sdt_probe_offsets(struct run_as_data *data, + struct run_as_ret *ret_value) +{ + ERR("Unimplemented runas command RUN_AS_EXTRACT_SDT_PROBE_OFFSETS"); + return -1; +} +#endif static run_as_fct run_as_enum_to_fct(enum run_as_cmd cmd) @@ -261,6 +333,8 @@ run_as_fct run_as_enum_to_fct(enum run_as_cmd cmd) return _mkdir_recursive; case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET: return _extract_elf_symbol_offset; + case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS: + return _extract_sdt_probe_offsets; default: ERR("Unknown command %d", (int) cmd); return NULL; @@ -273,7 +347,8 @@ int do_send_fd(int sock, int fd) ssize_t len; if (fd < 0) { - ERR("Invalid file description"); + ERR("Attempt to send invalid file descriptor to master (fd = %i)", fd); + /* Return 0 as this is not a fatal error. */ return 0; } @@ -290,11 +365,6 @@ int do_recv_fd(int sock, int *fd) { ssize_t len; - if (*fd < 0) { - ERR("Invalid file description"); - return 0; - } - len = lttcomm_recv_fds_unix_sock(sock, fd, 1); if (!len) { @@ -303,6 +373,12 @@ int do_recv_fd(int sock, int *fd) PERROR("lttcomm_recv_fds_unix_sock"); return -1; } + if (*fd < 0) { + ERR("Invalid file descriptor received from worker (fd = %i)", *fd); + /* Return 0 as this is not a fatal error. */ + return 0; + } + return 0; } @@ -313,11 +389,17 @@ int send_fd_to_worker(struct run_as_worker *worker, enum run_as_cmd cmd, int fd) switch (cmd) { case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET: + case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS: break; default: return 0; } + if (fd < 0) { + ERR("Refusing to send invalid fd to worker (fd = %i)", fd); + return -1; + } + ret = do_send_fd(worker->sockpair[0], fd); if (ret < 0) { PERROR("do_send_fd"); @@ -339,6 +421,10 @@ int send_fd_to_master(struct run_as_worker *worker, enum run_as_cmd cmd, int fd) return 0; } + if (fd < 0) { + DBG("Not sending file descriptor to master as it is invalid (fd = %i)", fd); + return 0; + } ret = do_send_fd(worker->sockpair[1], fd); if (ret < 0) { PERROR("do_send_fd error"); @@ -381,6 +467,7 @@ int recv_fd_from_master(struct run_as_worker *worker, enum run_as_cmd cmd, int * switch (cmd) { case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET: + case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS: break; default: return 0; @@ -402,11 +489,15 @@ int cleanup_received_fd(enum run_as_cmd cmd, int fd) switch (cmd) { case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET: + case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS: break; default: return 0; } + if (fd < 0) { + return 0; + } ret = close(fd); if (ret < 0) { PERROR("close error"); @@ -415,6 +506,7 @@ int cleanup_received_fd(enum run_as_cmd cmd, int fd) return ret; } + /* * Return < 0 on error, 0 if OK, 1 on hangup. */ @@ -428,6 +520,9 @@ int handle_one_cmd(struct run_as_worker *worker) run_as_fct cmd; uid_t prev_euid; + memset(&sendret, 0, sizeof(sendret)); + sendret.fd = -1; + /* * Stage 1: Receive run_as_data struct from the master. * The structure contains the command type and all the parameters needed for @@ -468,6 +563,8 @@ int handle_one_cmd(struct run_as_worker *worker) if (data.gid != getegid()) { ret = setegid(data.gid); if (ret < 0) { + sendret._error = true; + sendret._errno = errno; PERROR("setegid"); goto write_return; } @@ -475,6 +572,8 @@ int handle_one_cmd(struct run_as_worker *worker) if (data.uid != prev_euid) { ret = seteuid(data.uid); if (ret < 0) { + sendret._error = true; + sendret._errno = errno; PERROR("seteuid"); goto write_return; } @@ -650,6 +749,12 @@ int run_as_cmd(struct run_as_worker *worker, PERROR("Error reading response from run_as"); ret = -1; ret_value->_errno = errno; + goto end; + } + + if (ret_value->_error) { + /* Skip stage 5 on error as there will be no fd to receive. */ + goto end; } /* @@ -693,188 +798,6 @@ end: return ret; } -static -int run_as_restart_worker(struct run_as_worker *worker) -{ - int ret = 0; - char *procname = NULL; - - procname = worker->procname; - - /* Close socket to run_as worker process and clean up the zombie process */ - run_as_destroy_worker(); - - /* Create a new run_as worker process*/ - ret = run_as_create_worker(procname); - if (ret < 0 ) { - ERR("Restarting the worker process failed"); - ret = -1; - goto err; - } -err: - return ret; -} - -static -int run_as(enum run_as_cmd cmd, struct run_as_data *data, - struct run_as_ret *ret_value, uid_t uid, gid_t gid) -{ - int ret, saved_errno; - - if (use_clone()) { - DBG("Using run_as worker"); - pthread_mutex_lock(&worker_lock); - assert(global_worker); - - ret = run_as_cmd(global_worker, cmd, data, ret_value, uid, gid); - saved_errno = ret_value->_errno; - - pthread_mutex_unlock(&worker_lock); - /* - * If the worker thread crashed the errno is set to EIO. we log - * the error and start a new worker process. - */ - if (ret == -1 && saved_errno == EIO) { - DBG("Socket closed unexpectedly... " - "Restarting the worker process"); - ret = run_as_restart_worker(global_worker); - - if (ret == -1) { - ERR("Failed to restart worker process."); - goto err; - } - } - } else { - DBG("Using run_as without worker"); - ret = run_as_noworker(cmd, data, ret_value, uid, gid); - } -err: - return ret; -} - -LTTNG_HIDDEN -int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid) -{ - struct run_as_data data; - struct run_as_ret ret; - - memset(&data, 0, sizeof(data)); - memset(&ret, 0, sizeof(ret)); - DBG3("mkdir() recursive %s with mode %d for uid %d and gid %d", - path, (int) mode, (int) uid, (int) gid); - strncpy(data.u.mkdir.path, path, PATH_MAX - 1); - data.u.mkdir.path[PATH_MAX - 1] = '\0'; - data.u.mkdir.mode = mode; - - run_as(RUN_AS_MKDIR_RECURSIVE, &data, &ret, uid, gid); - errno = ret._errno; - return ret.u.mkdir.ret; -} - -LTTNG_HIDDEN -int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) -{ - struct run_as_data data; - struct run_as_ret ret; - - memset(&data, 0, sizeof(data)); - memset(&ret, 0, sizeof(ret)); - - DBG3("mkdir() %s with mode %d for uid %d and gid %d", - path, (int) mode, (int) uid, (int) gid); - strncpy(data.u.mkdir.path, path, PATH_MAX - 1); - data.u.mkdir.path[PATH_MAX - 1] = '\0'; - data.u.mkdir.mode = mode; - run_as(RUN_AS_MKDIR, &data, &ret, uid, gid); - errno = ret._errno; - return ret.u.mkdir.ret; -} - -LTTNG_HIDDEN -int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid) -{ - struct run_as_data data; - struct run_as_ret ret; - - memset(&data, 0, sizeof(data)); - memset(&ret, 0, sizeof(ret)); - - DBG3("open() %s with flags %X mode %d for uid %d and gid %d", - path, flags, (int) mode, (int) uid, (int) gid); - strncpy(data.u.open.path, path, PATH_MAX - 1); - data.u.open.path[PATH_MAX - 1] = '\0'; - data.u.open.flags = flags; - data.u.open.mode = mode; - run_as(RUN_AS_OPEN, &data, &ret, uid, gid); - errno = ret._errno; - ret.u.open.ret = ret.fd; - return ret.u.open.ret; -} - -LTTNG_HIDDEN -int run_as_unlink(const char *path, uid_t uid, gid_t gid) -{ - struct run_as_data data; - struct run_as_ret ret; - - memset(&data, 0, sizeof(data)); - memset(&ret, 0, sizeof(ret)); - - DBG3("unlink() %s with for uid %d and gid %d", - path, (int) uid, (int) gid); - strncpy(data.u.unlink.path, path, PATH_MAX - 1); - data.u.unlink.path[PATH_MAX - 1] = '\0'; - run_as(RUN_AS_UNLINK, &data, &ret, uid, gid); - errno = ret._errno; - return ret.u.unlink.ret; -} - -LTTNG_HIDDEN -int run_as_rmdir_recursive(const char *path, uid_t uid, gid_t gid) -{ - struct run_as_data data; - struct run_as_ret ret; - - memset(&data, 0, sizeof(data)); - memset(&ret, 0, sizeof(ret)); - - DBG3("rmdir_recursive() %s with for uid %d and gid %d", - path, (int) uid, (int) gid); - strncpy(data.u.rmdir_recursive.path, path, PATH_MAX - 1); - data.u.rmdir_recursive.path[PATH_MAX - 1] = '\0'; - run_as(RUN_AS_RMDIR_RECURSIVE, &data, &ret, uid, gid); - errno = ret._errno; - return ret.u.rmdir_recursive.ret; -} - -LTTNG_HIDDEN -int run_as_extract_elf_symbol_offset(int fd, const char* function, - uid_t uid, gid_t gid, uint64_t *offset) -{ - struct run_as_data data; - struct run_as_ret ret; - - DBG3("extract_elf_symbol_offset() on fd=%d and function=%s " - "with for uid %d and gid %d", fd, function, (int) uid, (int) gid); - - data.fd = fd; - - strncpy(data.u.extract_elf_symbol_offset.function, function, LTTNG_SYMBOL_NAME_LEN - 1); - - data.u.extract_elf_symbol_offset.function[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; - - run_as(RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET, &data, &ret, uid, gid); - - errno = ret._errno; - - if (ret._error) { - return -1; - } - - *offset = ret.u.extract_elf_symbol_offset.offset; - return 0; -} - static int reset_sighandler(void) { @@ -946,8 +869,10 @@ end: return ret; } -LTTNG_HIDDEN -int run_as_create_worker(char *procname) +static +int run_as_create_worker_no_lock(const char *procname, + post_fork_cleanup_cb clean_up_func, + void *clean_up_user_data) { pid_t pid; int i, ret = 0; @@ -955,7 +880,6 @@ int run_as_create_worker(char *procname) struct run_as_ret recvret; struct run_as_worker *worker; - pthread_mutex_lock(&worker_lock); assert(!global_worker); if (!use_clone()) { /* @@ -970,7 +894,11 @@ int run_as_create_worker(char *procname) ret = -ENOMEM; goto end; } - worker->procname = procname; + worker->procname = strdup(procname); + if (!worker->procname) { + ret = -ENOMEM; + goto error_procname_alloc; + } /* Create unix socket. */ if (lttcomm_create_anon_unix_socketpair(worker->sockpair) < 0) { ret = -1; @@ -989,9 +917,13 @@ int run_as_create_worker(char *procname) reset_sighandler(); set_worker_sighandlers(); + if (clean_up_func) { + if (clean_up_func(clean_up_user_data) < 0) { + ERR("Run-as post-fork clean-up failed, exiting."); + exit(EXIT_FAILURE); + } + } - /* The child has no use for this lock. */ - pthread_mutex_unlock(&worker_lock); /* Just close, no shutdown. */ if (close(worker->sockpair[0])) { PERROR("close"); @@ -1015,6 +947,8 @@ int run_as_create_worker(char *procname) ret = -1; } worker->sockpair[1] = -1; + free(worker->procname); + free(worker); LOG(ret ? PRINT_ERR : PRINT_DBG, "run_as worker exiting (ret = %d)", ret); exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); } else { @@ -1040,7 +974,6 @@ int run_as_create_worker(char *procname) global_worker = worker; } end: - pthread_mutex_unlock(&worker_lock); return ret; /* Error handling. */ @@ -1055,20 +988,20 @@ error_fork: worker->sockpair[i] = -1; } error_sock: + free(worker->procname); +error_procname_alloc: free(worker); - pthread_mutex_unlock(&worker_lock); return ret; } -LTTNG_HIDDEN -void run_as_destroy_worker(void) +static +void run_as_destroy_worker_no_lock(void) { struct run_as_worker *worker = global_worker; DBG("Destroying run_as worker"); - pthread_mutex_lock(&worker_lock); if (!worker) { - goto end; + return; } /* Close unix socket */ DBG("Closing run_as worker socket"); @@ -1101,8 +1034,256 @@ void run_as_destroy_worker(void) break; } } + free(worker->procname); free(worker); global_worker = NULL; -end: +} + +static +int run_as_restart_worker(struct run_as_worker *worker) +{ + int ret = 0; + char *procname = NULL; + + procname = worker->procname; + + /* Close socket to run_as worker process and clean up the zombie process */ + run_as_destroy_worker_no_lock(); + + /* Create a new run_as worker process*/ + ret = run_as_create_worker_no_lock(procname, NULL, NULL); + if (ret < 0 ) { + ERR("Restarting the worker process failed"); + ret = -1; + goto err; + } +err: + return ret; +} + +static +int run_as(enum run_as_cmd cmd, struct run_as_data *data, + struct run_as_ret *ret_value, uid_t uid, gid_t gid) +{ + int ret, saved_errno; + + pthread_mutex_lock(&worker_lock); + if (use_clone()) { + DBG("Using run_as worker"); + + assert(global_worker); + + ret = run_as_cmd(global_worker, cmd, data, ret_value, uid, gid); + saved_errno = ret_value->_errno; + + /* + * If the worker thread crashed the errno is set to EIO. we log + * the error and start a new worker process. + */ + if (ret == -1 && saved_errno == EIO) { + DBG("Socket closed unexpectedly... " + "Restarting the worker process"); + ret = run_as_restart_worker(global_worker); + if (ret == -1) { + ERR("Failed to restart worker process."); + goto err; + } + } + } else { + DBG("Using run_as without worker"); + ret = run_as_noworker(cmd, data, ret_value, uid, gid); + } +err: + pthread_mutex_unlock(&worker_lock); + return ret; +} + +LTTNG_HIDDEN +int run_as_mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + DBG3("mkdir() recursive %s with mode %d for uid %d and gid %d", + path, (int) mode, (int) uid, (int) gid); + strncpy(data.u.mkdir.path, path, PATH_MAX - 1); + data.u.mkdir.path[PATH_MAX - 1] = '\0'; + data.u.mkdir.mode = mode; + + run_as(RUN_AS_MKDIR_RECURSIVE, &data, &ret, uid, gid); + errno = ret._errno; + return ret.u.mkdir.ret; +} + +LTTNG_HIDDEN +int run_as_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("mkdir() %s with mode %d for uid %d and gid %d", + path, (int) mode, (int) uid, (int) gid); + strncpy(data.u.mkdir.path, path, PATH_MAX - 1); + data.u.mkdir.path[PATH_MAX - 1] = '\0'; + data.u.mkdir.mode = mode; + run_as(RUN_AS_MKDIR, &data, &ret, uid, gid); + errno = ret._errno; + return ret.u.mkdir.ret; +} + +LTTNG_HIDDEN +int run_as_open(const char *path, int flags, mode_t mode, uid_t uid, gid_t gid) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("open() %s with flags %X mode %d for uid %d and gid %d", + path, flags, (int) mode, (int) uid, (int) gid); + strncpy(data.u.open.path, path, PATH_MAX - 1); + data.u.open.path[PATH_MAX - 1] = '\0'; + data.u.open.flags = flags; + data.u.open.mode = mode; + run_as(RUN_AS_OPEN, &data, &ret, uid, gid); + errno = ret._errno; + ret.u.open.ret = ret.fd; + return ret.u.open.ret; +} + +LTTNG_HIDDEN +int run_as_unlink(const char *path, uid_t uid, gid_t gid) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("unlink() %s with for uid %d and gid %d", + path, (int) uid, (int) gid); + strncpy(data.u.unlink.path, path, PATH_MAX - 1); + data.u.unlink.path[PATH_MAX - 1] = '\0'; + run_as(RUN_AS_UNLINK, &data, &ret, uid, gid); + errno = ret._errno; + return ret.u.unlink.ret; +} + +LTTNG_HIDDEN +int run_as_rmdir_recursive(const char *path, uid_t uid, gid_t gid) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("rmdir_recursive() %s with for uid %d and gid %d", + path, (int) uid, (int) gid); + strncpy(data.u.rmdir_recursive.path, path, PATH_MAX - 1); + data.u.rmdir_recursive.path[PATH_MAX - 1] = '\0'; + run_as(RUN_AS_RMDIR_RECURSIVE, &data, &ret, uid, gid); + errno = ret._errno; + return ret.u.rmdir_recursive.ret; +} + +LTTNG_HIDDEN +int run_as_extract_elf_symbol_offset(int fd, const char* function, + uid_t uid, gid_t gid, uint64_t *offset) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("extract_elf_symbol_offset() on fd=%d and function=%s " + "with for uid %d and gid %d", fd, function, (int) uid, (int) gid); + + data.fd = fd; + + strncpy(data.u.extract_elf_symbol_offset.function, function, LTTNG_SYMBOL_NAME_LEN - 1); + + data.u.extract_elf_symbol_offset.function[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; + + run_as(RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET, &data, &ret, uid, gid); + + errno = ret._errno; + + if (ret._error) { + return -1; + } + + *offset = ret.u.extract_elf_symbol_offset.offset; + return 0; +} + +LTTNG_HIDDEN +int run_as_extract_sdt_probe_offsets(int fd, const char* provider_name, + const char* probe_name, uid_t uid, gid_t gid, + uint64_t **offsets, uint32_t *num_offset) +{ + struct run_as_data data; + struct run_as_ret ret; + + memset(&data, 0, sizeof(data)); + memset(&ret, 0, sizeof(ret)); + + DBG3("extract_sdt_probe_offsets() on fd=%d, probe_name=%s and " + "provider_name=%s with for uid %d and gid %d", fd, probe_name, + provider_name, (int) uid, (int) gid); + + data.fd = fd; + + strncpy(data.u.extract_sdt_probe_offsets.probe_name, probe_name, LTTNG_SYMBOL_NAME_LEN - 1); + strncpy(data.u.extract_sdt_probe_offsets.provider_name, provider_name, LTTNG_SYMBOL_NAME_LEN - 1); + + data.u.extract_sdt_probe_offsets.probe_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; + data.u.extract_sdt_probe_offsets.provider_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; + + run_as(RUN_AS_EXTRACT_SDT_PROBE_OFFSETS, &data, &ret, uid, gid); + + errno = ret._errno; + + if (ret._error) { + return -1; + } + + *num_offset = ret.u.extract_sdt_probe_offsets.num_offset; + + *offsets = zmalloc(*num_offset * sizeof(uint64_t)); + if (!*offsets) { + return -ENOMEM; + } + + memcpy(*offsets, ret.u.extract_sdt_probe_offsets.offsets, *num_offset * sizeof(uint64_t)); + return 0; +} + +LTTNG_HIDDEN +int run_as_create_worker(const char *procname, + post_fork_cleanup_cb clean_up_func, + void *clean_up_user_data) +{ + int ret; + + pthread_mutex_lock(&worker_lock); + ret = run_as_create_worker_no_lock(procname, clean_up_func, + clean_up_user_data); + pthread_mutex_unlock(&worker_lock); + return ret; +} + +LTTNG_HIDDEN +void run_as_destroy_worker(void) +{ + pthread_mutex_lock(&worker_lock); + run_as_destroy_worker_no_lock(); pthread_mutex_unlock(&worker_lock); }