Commit | Line | Data |
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309167d2 JD |
1 | /* |
2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License, version 2 only, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <assert.h> | |
1c20f0e2 | 21 | #include <sys/stat.h> |
309167d2 JD |
22 | |
23 | #include <common/common.h> | |
24 | #include <common/defaults.h> | |
25 | #include <common/utils.h> | |
26 | ||
27 | #include "index.h" | |
28 | ||
29 | /* | |
30 | * Create the index file associated with a trace file. | |
31 | * | |
32 | * Return fd on success, a negative value on error. | |
33 | */ | |
34 | int index_create_file(char *path_name, char *stream_name, int uid, int gid, | |
35 | uint64_t size, uint64_t count) | |
36 | { | |
37 | int ret, fd = -1; | |
6cd525e8 | 38 | ssize_t size_ret; |
50adc264 | 39 | struct ctf_packet_index_file_hdr hdr; |
1c20f0e2 | 40 | char fullpath[PATH_MAX]; |
309167d2 | 41 | |
1c20f0e2 JD |
42 | ret = snprintf(fullpath, sizeof(fullpath), "%s/" DEFAULT_INDEX_DIR, |
43 | path_name); | |
44 | if (ret < 0) { | |
45 | PERROR("snprintf index path"); | |
46 | goto error; | |
47 | } | |
48 | ||
49 | /* Create index directory if necessary. */ | |
50 | ret = run_as_mkdir(fullpath, S_IRWXU | S_IRWXG, uid, gid); | |
51 | if (ret < 0) { | |
52 | if (ret != -EEXIST) { | |
53 | ERR("Index trace directory creation error"); | |
54 | goto error; | |
55 | } | |
56 | } | |
57 | ||
58 | ret = utils_create_stream_file(fullpath, stream_name, size, count, uid, | |
309167d2 JD |
59 | gid, DEFAULT_INDEX_FILE_SUFFIX); |
60 | if (ret < 0) { | |
61 | goto error; | |
62 | } | |
63 | fd = ret; | |
64 | ||
50adc264 JD |
65 | hdr.magic = htobe32(CTF_INDEX_MAGIC); |
66 | hdr.index_major = htobe32(CTF_INDEX_MAJOR); | |
67 | hdr.index_minor = htobe32(CTF_INDEX_MINOR); | |
68 | hdr.packet_index_len = sizeof(struct ctf_packet_index); | |
309167d2 | 69 | |
6cd525e8 MD |
70 | size_ret = lttng_write(fd, &hdr, sizeof(hdr)); |
71 | if (size_ret < sizeof(hdr)) { | |
309167d2 | 72 | PERROR("write index header"); |
6cd525e8 | 73 | ret = -1; |
309167d2 JD |
74 | goto error; |
75 | } | |
76 | ||
77 | return fd; | |
78 | ||
79 | error: | |
80 | if (fd >= 0) { | |
81 | int close_ret; | |
82 | ||
83 | close_ret = close(fd); | |
84 | if (close_ret < 0) { | |
85 | PERROR("close index fd"); | |
86 | } | |
87 | } | |
88 | return ret; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Write index values to the given fd of size len. | |
93 | * | |
6cd525e8 MD |
94 | * Return "len" on success or else < len on error. errno contains error |
95 | * details. | |
309167d2 | 96 | */ |
50adc264 | 97 | ssize_t index_write(int fd, struct ctf_packet_index *index, size_t len) |
309167d2 | 98 | { |
6cd525e8 | 99 | ssize_t ret; |
309167d2 JD |
100 | |
101 | assert(fd >= 0); | |
102 | assert(index); | |
103 | ||
6cd525e8 MD |
104 | ret = lttng_write(fd, index, len); |
105 | if (ret < len) { | |
309167d2 JD |
106 | PERROR("writing index file"); |
107 | } | |
108 | ||
109 | return ret; | |
110 | } |