X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=libustcomm%2Flibustcomm.c;fp=libustcomm%2Flibustcomm.c;h=0000000000000000000000000000000000000000;hb=97b1a726be0f1779f5508543c58521d774312e73;hp=bbf4ef9c1201fdab13b5851db407c64ba10a2025;hpb=0b8091d3f931437d2035cfa70549c5aa15b41aac;p=lttng-tools.git diff --git a/libustcomm/libustcomm.c b/libustcomm/libustcomm.c deleted file mode 100644 index bbf4ef9c1..000000000 --- a/libustcomm/libustcomm.c +++ /dev/null @@ -1,1027 +0,0 @@ -/* - * Copyright (C) 2009 Pierre-Marc Fournier - * 2010 Nils Carlson - * 2011 David Goulet - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#define _GNU_SOURCE -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "libustcomm.h" -#include "lttngerr.h" - -#define MAX_SOCK_PATH_BASE_LEN 100 - -/* - * get_sock_name - * - * Set sock_name to the libust socket path using the pid - * and the base directory dir_name. - */ -static int get_sock_name(char *dir_name, pid_t pid, char *sock_name) -{ - struct dirent *dirent; - char sock_path_base[MAX_SOCK_PATH_BASE_LEN]; - int len; - DIR *dir; - - dir = opendir(dir_name); - if (dir == NULL) { - ERR("ustcomm sock name opendir %s", dir_name); - goto out_err; - } - - snprintf(sock_path_base, MAX_SOCK_PATH_BASE_LEN - 1, "%ld", (long) pid); - len = strlen(sock_path_base); - - DBG("Socket directory %s", sock_path_base); - - while ((dirent = readdir(dir))) { - if (!strcmp(dirent->d_name, ".") || - !strcmp(dirent->d_name, "..") || - !strcmp(dirent->d_name, "ust-consumer") || - dirent->d_type == DT_DIR || - strncmp(dirent->d_name, sock_path_base, len) != 0) { - continue; - } - - if (snprintf(sock_name, PATH_MAX - 1, "%s/%s", dir_name, dirent->d_name) < 0) { - perror("path longer than PATH_MAX?"); - goto out_err; - } - - break; - } - - return 0; - -out_err: - closedir(dir); - return -1; -} - -/* - * create_sock_addr - * - * Create a sockaddr structure for unic socket. - */ -static struct sockaddr_un *create_sock_addr(const char *name, size_t *sock_addr_size) -{ - struct sockaddr_un * addr; - size_t alloc_size; - - alloc_size = (size_t) (((struct sockaddr_un *) 0)->sun_path) + - strlen(name) + 1; - - addr = malloc(alloc_size); - if (addr < 0) { - ERR("allocating addr failed"); - return NULL; - } - - addr->sun_family = AF_UNIX; - strcpy(addr->sun_path, name); - - *sock_addr_size = alloc_size; - - return addr; -} - -/* - * connect_app_non_root - * - * Open a connection to a non root traceable app. - * On error, return -1 else 0 - */ -static int connect_app_non_root(pid_t pid, int *app_fd) -{ - int result; - int retval = 0; - char *dir_name; - char sock_name[PATH_MAX]; - - dir_name = ustcomm_user_sock_dir(); - if (!dir_name) { - return -ENOMEM; - } - - if (get_sock_name(dir_name, pid, sock_name)) { - retval = -ENOENT; - goto free_dir_name; - } - - result = ustcomm_connect_path(sock_name, app_fd); - if (result < 0) { - ERR("failed to connect to app"); - retval = -1; - goto free_dir_name; - } - -free_dir_name: - free(dir_name); - - return retval; -} - -/* - * connect_app_root - * - * Open a connection to a root traceable app. - * On error, return -1 else 0 - */ -static int connect_app_root(pid_t pid, int *app_fd) -{ - DIR *tmp_dir; - struct dirent *dirent; - char dir_name[PATH_MAX], sock_name[PATH_MAX]; - int result = -1; - - tmp_dir = opendir(USER_TMP_DIR); - if (!tmp_dir) { - return -1; - } - - while ((dirent = readdir(tmp_dir))) { - if (!strncmp(dirent->d_name, USER_SOCK_DIR_BASE, - strlen(USER_SOCK_DIR_BASE))) { - - if (snprintf(dir_name, PATH_MAX - 1, "%s/%s", USER_TMP_DIR, - dirent->d_name) < 0) { - continue; - } - - if (get_sock_name(dir_name, pid, sock_name)) { - continue; - } - - result = ustcomm_connect_path(sock_name, app_fd); - - if (result == 0) { - goto close_tmp_dir; - } - } - } - -close_tmp_dir: - closedir(tmp_dir); - - return result; -} - -/* - * time_and_pid_from_socket_name - * - * Get time from socket name - */ -static int time_and_pid_from_socket_name(char *sock_name, unsigned long *time, - pid_t *pid) -{ - char *saveptr, *pid_m_time_str; - char *sock_basename = strdup(basename(sock_name)); - - if (!sock_basename) { - return -1; - } - - /* This is the pid */ - pid_m_time_str = strtok_r(sock_basename, ".", &saveptr); - if (!pid_m_time_str) { - goto out_err; - } - - errno = 0; - *pid = (pid_t)strtoul(pid_m_time_str, NULL, 10); - if (errno) { - goto out_err; - } - - /* This should be the time-stamp */ - pid_m_time_str = strtok_r(NULL, ".", &saveptr); - if (!pid_m_time_str) { - goto out_err; - } - - errno = 0; - *time = strtoul(pid_m_time_str, NULL, 10); - if (errno) { - goto out_err; - } - - return 0; - -out_err: - free(sock_basename); - return -1; -} - -/* - * ustcomm_is_socket_live - * - * Check if socket is available and "living". - */ -int ustcomm_is_socket_live(char *sock_name, pid_t *read_pid) -{ - time_t time_from_pid; - unsigned long time_from_sock; - pid_t pid; - - if (time_and_pid_from_socket_name(sock_name, &time_from_sock, &pid)) { - return 0; - } - - if (read_pid) { - *read_pid = pid; - } - - time_from_pid = ustcomm_pid_st_mtime(pid); - if (!time_from_pid) { - return 0; - } - - if ((unsigned long) time_from_pid == time_from_sock) { - return 1; - } - - return 0; -} - -/* - * ustcomm_init_sock - * - * Init socket for communication between libust and libustcomm. - */ -struct ustcomm_sock *ustcomm_init_sock(int fd, int epoll_fd, - struct cds_list_head *list) -{ - struct epoll_event ev; - struct ustcomm_sock *sock; - - sock = malloc(sizeof(struct ustcomm_sock)); - if (!sock) { - perror("malloc: couldn't allocate ustcomm_sock"); - return NULL; - } - - ev.events = EPOLLIN; - ev.data.ptr = sock; - sock->fd = fd; - - if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock->fd, &ev) == -1) { - perror("epoll_ctl: failed to add socket\n"); - free(sock); - return NULL; - } - - sock->epoll_fd = epoll_fd; - if (list) { - cds_list_add(&sock->list, list); - } else { - CDS_INIT_LIST_HEAD(&sock->list); - } - - return sock; -} - -/* - * ustcomm_del_sock - * - * Delete socket and remove it from the epoll set. - */ -void ustcomm_del_sock(struct ustcomm_sock *sock, int keep_in_epoll) -{ - cds_list_del(&sock->list); - if (!keep_in_epoll) { - if (epoll_ctl(sock->epoll_fd, EPOLL_CTL_DEL, sock->fd, NULL) == -1) { - perror("epoll_ctl: failed to delete socket"); - } - } - close(sock->fd); - free(sock); -} - -/* - * ustcomm_init_named_socket - * - * Init unix named socket - */ -struct ustcomm_sock *ustcomm_init_named_socket(const char *name, int epoll_fd) -{ - int result; - int fd; - size_t sock_addr_size; - struct sockaddr_un * addr; - struct ustcomm_sock *sock; - - fd = socket(PF_UNIX, SOCK_STREAM, 0); - if(fd == -1) { - perror("socket"); - return NULL; - } - - addr = create_sock_addr(name, &sock_addr_size); - if (addr == NULL) { - ERR("allocating addr, UST thread bailing"); - goto close_sock; - } - - result = access(name, F_OK); - if(result == 0) { - /* file exists */ - result = unlink(name); - if(result == -1) { - perror("unlink of socket file"); - goto free_addr; - } - DBG("socket already exists; overwriting"); - } - - result = bind(fd, (struct sockaddr *)addr, sock_addr_size); - if(result == -1) { - perror("bind"); - goto free_addr; - } - - result = listen(fd, 1); - if(result == -1) { - perror("listen"); - goto free_addr; - } - - sock = ustcomm_init_sock(fd, epoll_fd, NULL); - if (!sock) { - ERR("failed to create ustcomm_sock"); - goto free_addr; - } - - free(addr); - - return sock; - -free_addr: - free(addr); -close_sock: - close(fd); - - return NULL; -} - -/* - * ustcomm_del_named_sock - * - * Delete named socket - */ -void ustcomm_del_named_sock(struct ustcomm_sock *sock, int keep_socket_file) -{ - int result, fd; - struct stat st; - struct sockaddr dummy; - struct sockaddr_un *sockaddr = NULL; - int alloc_size; - - fd = sock->fd; - - if(!keep_socket_file) { - - /* Get the socket name */ - alloc_size = sizeof(dummy); - if (getsockname(fd, &dummy, (socklen_t *)&alloc_size) < 0) { - perror("getsockname failed"); - goto del_sock; - } - - sockaddr = malloc(alloc_size); - if (!sockaddr) { - ERR("failed to allocate sockaddr"); - goto del_sock; - } - - if (getsockname(fd, sockaddr, (socklen_t *)&alloc_size) < 0) { - perror("getsockname failed"); - goto free_sockaddr; - } - - /* Destroy socket */ - result = stat(sockaddr->sun_path, &st); - if(result < 0) { - ERR("stat (%s)", sockaddr->sun_path); - goto free_sockaddr; - } - - /* Paranoid check before deleting. */ - result = S_ISSOCK(st.st_mode); - if(!result) { - ERR("The socket we are about to delete is not a socket."); - goto free_sockaddr; - } - - result = unlink(sockaddr->sun_path); - if(result < 0) { - perror("unlink"); - } - } - -free_sockaddr: - free(sockaddr); - -del_sock: - ustcomm_del_sock(sock, keep_socket_file); -} - -/* - * ustcomm_recv_alloc - * - * Receive data and allocate data reception buffers. - */ -int ustcomm_recv_alloc(int sock, struct ustcomm_header *header, char **data) -{ - int result; - struct ustcomm_header peek_header; - struct iovec iov[2]; - struct msghdr msg; - - /* Just to make the caller fail hard */ - *data = NULL; - - result = recv(sock, &peek_header, sizeof(peek_header), MSG_PEEK | MSG_WAITALL); - if (result <= 0) { - if(errno == ECONNRESET) { - return 0; - } else if (errno == EINTR) { - return -1; - } else if (result < 0) { - perror("recv"); - return -1; - } - return 0; - } - - memset(&msg, 0, sizeof(msg)); - - iov[0].iov_base = (char *)header; - iov[0].iov_len = sizeof(struct ustcomm_header); - - msg.msg_iov = iov; - msg.msg_iovlen = 1; - - if (peek_header.size) { - *data = malloc(peek_header.size); - if (!*data) { - return -ENOMEM; - } - - iov[1].iov_base = *data; - iov[1].iov_len = peek_header.size; - - msg.msg_iovlen++; - } - - result = recvmsg(sock, &msg, MSG_WAITALL); - if (result < 0) { - free(*data); - perror("recvmsg failed"); - } - - return result; -} - -/* - * ustcomm_recv_fd - * - * Receive data from fd. - * returns 1 to indicate a message was received - * returns 0 to indicate no message was received (end of stream) - * returns -1 to indicate an error - */ -int ustcomm_recv_fd(int sock, struct ustcomm_header *header, char *data, int *fd) -{ - int result; - struct ustcomm_header peek_header; - struct iovec iov[2]; - struct msghdr msg; - struct cmsghdr *cmsg; - char buf[CMSG_SPACE(sizeof(int))]; - - result = recv(sock, &peek_header, sizeof(peek_header), MSG_PEEK | MSG_WAITALL); - if (result <= 0) { - if(errno == ECONNRESET) { - return 0; - } else if (errno == EINTR) { - return -1; - } else if (result < 0) { - perror("recv"); - return -1; - } - return 0; - } - - memset(&msg, 0, sizeof(msg)); - - iov[0].iov_base = (char *)header; - iov[0].iov_len = sizeof(struct ustcomm_header); - - msg.msg_iov = iov; - msg.msg_iovlen = 1; - - if (peek_header.size && data) { - if (peek_header.size < 0 || - peek_header.size > USTCOMM_DATA_SIZE) { - ERR("big peek header! %ld", peek_header.size); - return 0; - } - - iov[1].iov_base = data; - iov[1].iov_len = peek_header.size; - - msg.msg_iovlen++; - } - - if (fd && peek_header.fd_included) { - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - } - - result = recvmsg(sock, &msg, MSG_WAITALL); - if (result <= 0) { - if (result < 0) { - perror("recvmsg failed"); - } - return result; - } - - if (fd && peek_header.fd_included) { - cmsg = CMSG_FIRSTHDR(&msg); - result = 0; - while (cmsg != NULL) { - if (cmsg->cmsg_level == SOL_SOCKET - && cmsg->cmsg_type == SCM_RIGHTS) { - *fd = *(int *) CMSG_DATA(cmsg); - result = 1; - break; - } - cmsg = CMSG_NXTHDR(&msg, cmsg); - } - if (!result) { - ERR("Failed to receive file descriptor\n"); - } - } - - return 1; -} - -/* - * ustcomm_recv - * - * Recv wrapper - */ -int ustcomm_recv(int sock, struct ustcomm_header *header, char *data) -{ - return ustcomm_recv_fd(sock, header, data, NULL); -} - -/* - * ustcomm_send_fd - * - * Send data to fd. - */ -int ustcomm_send_fd(int sock, const struct ustcomm_header *header, - const char *data, int *fd) -{ - struct iovec iov[2]; - struct msghdr msg; - int result; - struct cmsghdr *cmsg; - char buf[CMSG_SPACE(sizeof(int))]; - - memset(&msg, 0, sizeof(msg)); - - iov[0].iov_base = (char *)header; - iov[0].iov_len = sizeof(struct ustcomm_header); - - msg.msg_iov = iov; - msg.msg_iovlen = 1; - - if (header->size && data) { - iov[1].iov_base = (char *)data; - iov[1].iov_len = header->size; - - msg.msg_iovlen++; - - } - - if (fd && header->fd_included) { - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - *(int *) CMSG_DATA(cmsg) = *fd; - msg.msg_controllen = cmsg->cmsg_len; - } - - result = sendmsg(sock, &msg, MSG_NOSIGNAL); - if (result < 0 && errno != EPIPE) { - perror("sendmsg failed"); - } - return result; -} - -/* - * ustcomm_send - * - * Send wrapper - */ -int ustcomm_send(int sock, const struct ustcomm_header *header, const char *data) -{ - return ustcomm_send_fd(sock, header, data, NULL); -} - -/* - * ustcomm_req - * - * Do a request to the libust socket which means sending data and - * receiving data. - */ -int ustcomm_req(int sock, - const struct ustcomm_header *req_header, - const char *req_data, - struct ustcomm_header *res_header, - char *res_data) -{ - int result; - - result = ustcomm_send(sock, req_header, req_data); - if ( result <= 0) { - return result; - } - - return ustcomm_recv(sock, res_header, res_data); -} - -/* - * ustcomm_connect_path - * - * Connect to an fd. - * Return value: - * 0: success - * -1: error - */ -int ustcomm_connect_path(const char *name, int *connection_fd) -{ - int result, fd; - size_t sock_addr_size; - struct sockaddr_un *addr; - - fd = socket(PF_UNIX, SOCK_STREAM, 0); - if(fd == -1) { - perror("socket"); - return -1; - } - - addr = create_sock_addr(name, &sock_addr_size); - if (addr == NULL) { - ERR("allocating addr failed"); - goto close_sock; - } - - result = connect(fd, (struct sockaddr *)addr, sock_addr_size); - if(result == -1) { - perror("ustcomm connect path"); - goto free_sock_addr; - } - - *connection_fd = fd; - - free(addr); - - return 0; - -free_sock_addr: - free(addr); -close_sock: - close(fd); - - return -1; -} - -/* - * ustcomm_user_sock_dir - * - * Returns the current users socket directory, must be freed. - */ -char *ustcomm_user_sock_dir(void) -{ - int result; - char *sock_dir = NULL; - - result = asprintf(&sock_dir, "/tmp/ust-app-socks/"); - if (result < 0) { - ERR("string overflow allocating directory name"); - return NULL; - } - - return sock_dir; -} - -/* - * ustcomm_pid_st_mtime - * - * Return time of the process pid creation. - */ -time_t ustcomm_pid_st_mtime(pid_t pid) -{ - struct stat proc_stat; - char proc_name[PATH_MAX]; - - if (snprintf(proc_name, PATH_MAX - 1, "/proc/%ld", (long) pid) < 0) { - return 0; - } - - if (stat(proc_name, &proc_stat)) { - return 0; - } - - return proc_stat.st_mtime; -} - -/* - * ustcomm_connect_app - * - * Connect to libust application using the pid. - */ -int ustcomm_connect_app(pid_t pid, int *app_fd) -{ - *app_fd = 0; - - if (geteuid()) { - return connect_app_non_root(pid, app_fd); - } else { - return connect_app_root(pid, app_fd); - } - -} - -/* - * ustcomm_print_data - * - * Print data in a data_field. - */ -char *ustcomm_print_data(char *data_field, int field_size, - int *offset, const char *format, ...) -{ - va_list args; - int count, limit; - char *ptr = USTCOMM_POISON_PTR; - - limit = field_size - *offset; - va_start(args, format); - count = vsnprintf(&data_field[*offset], limit, format, args); - va_end(args); - - if (count < limit && count > -1) { - ptr = NULL + *offset; - *offset = *offset + count + 1; - } - - return ptr; -} - -/* - * ustcomm_restore_ptr - */ -char *ustcomm_restore_ptr(char *ptr, char *data_field, int data_field_size) -{ - if ((unsigned long)ptr > data_field_size || ptr == USTCOMM_POISON_PTR) { - return NULL; - } - - return data_field + (long)ptr; -} - -/* - * ustcomm_pack_single_field - */ -int ustcomm_pack_single_field(struct ustcomm_header *header, - struct ustcomm_single_field *single_field, - const char *string) -{ - int offset = 0; - - single_field->field = ustcomm_print_data(single_field->data, - sizeof(single_field->data), - &offset, - string); - - if (single_field->field == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - header->size = COMPUTE_MSG_SIZE(single_field, offset); - - return 0; -} - -/* - * ustcomm_unpack_single_field - */ -int ustcomm_unpack_single_field(struct ustcomm_single_field *single_field) -{ - single_field->field = ustcomm_restore_ptr(single_field->field, - single_field->data, - sizeof(single_field->data)); - if (!single_field->field) { - return -EINVAL; - } - - return 0; -} - -/* - * ustcomm_pack_channel_info - */ -int ustcomm_pack_channel_info(struct ustcomm_header *header, - struct ustcomm_channel_info *ch_inf, const char *trace, const char *channel) -{ - int offset = 0; - - ch_inf->trace = ustcomm_print_data(ch_inf->data, - sizeof(ch_inf->data), &offset, trace); - - if (ch_inf->trace == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - ch_inf->channel = ustcomm_print_data(ch_inf->data, - sizeof(ch_inf->data), &offset, channel); - - if (ch_inf->channel == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - header->size = COMPUTE_MSG_SIZE(ch_inf, offset); - - return 0; -} - -/* - * ustcomm_unpack_channel_info - */ -int ustcomm_unpack_channel_info(struct ustcomm_channel_info *ch_inf) -{ - ch_inf->trace = ustcomm_restore_ptr(ch_inf->trace, - ch_inf->data, sizeof(ch_inf->data)); - if (!ch_inf->trace) { - return -EINVAL; - } - - ch_inf->channel = ustcomm_restore_ptr(ch_inf->channel, - ch_inf->data, sizeof(ch_inf->data)); - if (!ch_inf->channel) { - return -EINVAL; - } - - return 0; -} - -/* - * ustcomm_pack_buffer_info - */ -int ustcomm_pack_buffer_info(struct ustcomm_header *header, - struct ustcomm_buffer_info *buf_inf, - const char *trace, const char *channel, int channel_cpu) -{ - int offset = 0; - - buf_inf->trace = ustcomm_print_data(buf_inf->data, - sizeof(buf_inf->data), &offset, trace); - - if (buf_inf->trace == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - buf_inf->channel = ustcomm_print_data(buf_inf->data, - sizeof(buf_inf->data), &offset, channel); - - if (buf_inf->channel == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - buf_inf->ch_cpu = channel_cpu; - - header->size = COMPUTE_MSG_SIZE(buf_inf, offset); - - return 0; -} - -/* - * ustcomm_unpack_buffer_info - */ -int ustcomm_unpack_buffer_info(struct ustcomm_buffer_info *buf_inf) -{ - buf_inf->trace = ustcomm_restore_ptr(buf_inf->trace, - buf_inf->data, sizeof(buf_inf->data)); - if (!buf_inf->trace) { - return -EINVAL; - } - - buf_inf->channel = ustcomm_restore_ptr(buf_inf->channel, - buf_inf->data, sizeof(buf_inf->data)); - if (!buf_inf->channel) { - return -EINVAL; - } - - return 0; -} - -/* - * ustcomm_pack_ust_marker_info - */ -int ustcomm_pack_ust_marker_info(struct ustcomm_header *header, - struct ustcomm_ust_marker_info *ust_marker_inf, - const char *trace, const char *channel, const char *ust_marker) -{ - int offset = 0; - - ust_marker_inf->trace = ustcomm_print_data(ust_marker_inf->data, - sizeof(ust_marker_inf->data), &offset, trace); - - if (ust_marker_inf->trace == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - - ust_marker_inf->channel = ustcomm_print_data(ust_marker_inf->data, - sizeof(ust_marker_inf->data), &offset, channel); - - if (ust_marker_inf->channel == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - - ust_marker_inf->ust_marker = ustcomm_print_data(ust_marker_inf->data, - sizeof(ust_marker_inf->data), &offset, ust_marker); - - if (ust_marker_inf->ust_marker == USTCOMM_POISON_PTR) { - return -ENOMEM; - } - - header->size = COMPUTE_MSG_SIZE(ust_marker_inf, offset); - - return 0; -} - -/* - * ustcomm_unpack_ust_marker_info - */ -int ustcomm_unpack_ust_marker_info(struct ustcomm_ust_marker_info *ust_marker_inf) -{ - ust_marker_inf->trace = ustcomm_restore_ptr(ust_marker_inf->trace, - ust_marker_inf->data, - sizeof(ust_marker_inf->data)); - if (!ust_marker_inf->trace) { - return -EINVAL; - } - - ust_marker_inf->channel = ustcomm_restore_ptr(ust_marker_inf->channel, - ust_marker_inf->data, sizeof(ust_marker_inf->data)); - if (!ust_marker_inf->channel) { - return -EINVAL; - } - - ust_marker_inf->ust_marker = ustcomm_restore_ptr(ust_marker_inf->ust_marker, - ust_marker_inf->data, sizeof(ust_marker_inf->data)); - if (!ust_marker_inf->ust_marker) { - return -EINVAL; - } - - return 0; -} -