-/*
- * Copyright (C) 2009 Pierre-Marc Fournier
- * 2010 Nils Carlson <nils.carlson@ericsson.com>
- * 2011 David Goulet <david.goulet@polymtl.ca>
- *
- * 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 <dirent.h>
-#include <errno.h>
-#include <limits.h>
-#include <poll.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/un.h>
-#include <unistd.h>
-
-#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;
-}
-
projects / lttng-tools.git / commitdiff
