X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Findex%2Findex.c;h=b481badb1d6556e2f6f1807264d33e81e6be41b2;hb=HEAD;hp=0935d702dccea0b2fd60ea4de2baa3babd9848f3;hpb=71b4cdb4772eee93e11df518caeb5f8466156764;p=lttng-tools.git diff --git a/src/common/index/index.c b/src/common/index/index.c deleted file mode 100644 index 0935d702d..000000000 --- a/src/common/index/index.c +++ /dev/null @@ -1,294 +0,0 @@ -/* - * Copyright (C) 2013 - Julien Desfossez - * David Goulet - * 2016 - Mathieu Desnoyers - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License, version 2 only, as - * published by the Free Software Foundation. - * - * This program 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 General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 51 - * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#define _LGPL_SOURCE -#include -#include -#include -#include - -#include -#include -#include -#include - -#include "index.h" - -/* - * Create the index file associated with a trace file. - * - * Return allocated struct lttng_index_file, NULL on error. - */ -struct lttng_index_file *lttng_index_file_create(const char *path_name, - char *stream_name, int uid, int gid, - uint64_t size, uint64_t count, uint32_t major, uint32_t minor) -{ - struct lttng_index_file *index_file; - int ret, fd = -1; - ssize_t size_ret; - struct ctf_packet_index_file_hdr hdr; - char fullpath[PATH_MAX]; - uint32_t element_len = ctf_packet_index_len(major, minor); - - index_file = zmalloc(sizeof(*index_file)); - if (!index_file) { - PERROR("allocating lttng_index_file"); - goto error; - } - - ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR, - path_name); - if (ret < 0) { - PERROR("snprintf index path"); - goto error; - } - - /* Create index directory if necessary. */ - ret = utils_mkdir(fullpath, S_IRWXU | S_IRWXG, uid, gid); - if (ret < 0) { - if (errno != EEXIST) { - PERROR("Index trace directory creation error"); - goto error; - } - } - - /* - * For tracefile rotation. We need to unlink the old - * file if present to synchronize with the tail of the - * live viewer which could be working on this same file. - * By doing so, any reference to the old index file - * stays valid even if we re-create a new file with the - * same name afterwards. - */ - ret = utils_unlink_stream_file(fullpath, stream_name, size, count, uid, - gid, DEFAULT_INDEX_FILE_SUFFIX); - if (ret < 0 && errno != ENOENT) { - goto error; - } - ret = utils_create_stream_file(fullpath, stream_name, size, count, uid, - gid, DEFAULT_INDEX_FILE_SUFFIX); - if (ret < 0) { - goto error; - } - fd = ret; - - ctf_packet_index_file_hdr_init(&hdr, major, minor); - size_ret = lttng_write(fd, &hdr, sizeof(hdr)); - if (size_ret < sizeof(hdr)) { - PERROR("write index header"); - goto error; - } - index_file->fd = fd; - index_file->major = major; - index_file->minor = minor; - index_file->element_len = element_len; - urcu_ref_init(&index_file->ref); - - return index_file; - -error: - if (fd >= 0) { - int close_ret; - - close_ret = close(fd); - if (close_ret < 0) { - PERROR("close index fd"); - } - } - free(index_file); - return NULL; -} - -/* - * Write index values to the given index file. - * - * Return 0 on success, -1 on error. - */ -int lttng_index_file_write(const struct lttng_index_file *index_file, - const struct ctf_packet_index *element) -{ - int fd; - size_t len; - ssize_t ret; - - assert(index_file); - assert(element); - - fd = index_file->fd; - len = index_file->element_len; - - if (fd < 0) { - goto error; - } - - ret = lttng_write(fd, element, len); - if (ret < len) { - PERROR("writing index file"); - goto error; - } - return 0; - -error: - return -1; -} - -/* - * Read index values from the given index file. - * - * Return 0 on success, -1 on error. - */ -int lttng_index_file_read(const struct lttng_index_file *index_file, - struct ctf_packet_index *element) -{ - ssize_t ret; - int fd = index_file->fd; - size_t len = index_file->element_len; - - assert(element); - - if (fd < 0) { - goto error; - } - - ret = lttng_read(fd, element, len); - if (ret < 0) { - PERROR("read index file"); - goto error; - } - if (ret < len) { - ERR("lttng_read expected %zu, returned %zd", len, ret); - goto error; - } - return 0; - -error: - return -1; -} - -/* - * Open index file using a given path, channel name and tracefile count. - * - * Return allocated struct lttng_index_file, NULL on error. - */ -struct lttng_index_file *lttng_index_file_open(const char *path_name, - const char *channel_name, uint64_t tracefile_count, - uint64_t tracefile_count_current) -{ - struct lttng_index_file *index_file; - int ret, read_fd; - ssize_t read_len; - char fullpath[PATH_MAX]; - struct ctf_packet_index_file_hdr hdr; - uint32_t major, minor, element_len; - - assert(path_name); - assert(channel_name); - - index_file = zmalloc(sizeof(*index_file)); - if (!index_file) { - PERROR("allocating lttng_index_file"); - goto error; - } - - if (tracefile_count > 0) { - ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR "/%s_%" - PRIu64 DEFAULT_INDEX_FILE_SUFFIX, path_name, - channel_name, tracefile_count_current); - } else { - ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR "/%s" - DEFAULT_INDEX_FILE_SUFFIX, path_name, channel_name); - } - if (ret < 0) { - PERROR("snprintf index path"); - goto error; - } - - DBG("Index opening file %s in read only", fullpath); - read_fd = open(fullpath, O_RDONLY); - if (read_fd < 0) { - PERROR("opening index in read-only"); - goto error; - } - - read_len = lttng_read(read_fd, &hdr, sizeof(hdr)); - if (read_len < 0) { - PERROR("Reading index header"); - goto error_close; - } - - if (be32toh(hdr.magic) != CTF_INDEX_MAGIC) { - ERR("Invalid header magic"); - goto error_close; - } - major = be32toh(hdr.index_major); - minor = be32toh(hdr.index_minor); - element_len = be32toh(hdr.packet_index_len); - - if (major != CTF_INDEX_MAJOR) { - ERR("Invalid header version"); - goto error_close; - } - if (element_len > sizeof(struct ctf_packet_index)) { - ERR("Index element length too long"); - goto error_close; - } - - index_file->fd = read_fd; - index_file->major = major; - index_file->minor = minor; - index_file->element_len = element_len; - urcu_ref_init(&index_file->ref); - - return index_file; - -error_close: - if (read_fd >= 0) { - int close_ret; - - close_ret = close(read_fd); - if (close_ret < 0) { - PERROR("close read fd %d", read_fd); - } - } - -error: - free(index_file); - return NULL; -} - -void lttng_index_file_get(struct lttng_index_file *index_file) -{ - urcu_ref_get(&index_file->ref); -} - -static void lttng_index_file_release(struct urcu_ref *ref) -{ - struct lttng_index_file *index_file = caa_container_of(ref, - struct lttng_index_file, ref); - - if (close(index_file->fd)) { - PERROR("close index fd"); - } - free(index_file); -} - -void lttng_index_file_put(struct lttng_index_file *index_file) -{ - urcu_ref_put(&index_file->ref, lttng_index_file_release); -}