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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Zbigniew Jędrzejewski-Szmek | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "journal-remote-write.h" | |
23 | ||
24 | int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) { | |
25 | if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1)) | |
26 | return log_oom(); | |
27 | ||
28 | iovw->iovec[iovw->count++] = (struct iovec) {data, len}; | |
29 | return 0; | |
30 | } | |
31 | ||
32 | void iovw_free_contents(struct iovec_wrapper *iovw) { | |
33 | for (size_t j = 0; j < iovw->count; j++) | |
34 | free(iovw->iovec[j].iov_base); | |
35 | free(iovw->iovec); | |
36 | iovw->iovec = NULL; | |
37 | iovw->size_bytes = iovw->count = 0; | |
38 | } | |
39 | ||
40 | size_t iovw_size(struct iovec_wrapper *iovw) { | |
41 | size_t n = 0, i; | |
42 | ||
43 | for(i = 0; i < iovw->count; i++) | |
44 | n += iovw->iovec[i].iov_len; | |
45 | ||
46 | return n; | |
47 | } | |
48 | ||
49 | /********************************************************************** | |
50 | ********************************************************************** | |
51 | **********************************************************************/ | |
52 | ||
53 | static int do_rotate(JournalFile **f, bool compress, bool seal) { | |
54 | int r = journal_file_rotate(f, compress, seal); | |
55 | if (r < 0) { | |
56 | if (*f) | |
57 | log_error("Failed to rotate %s: %s", (*f)->path, | |
58 | strerror(-r)); | |
59 | else | |
60 | log_error("Failed to create rotated journal: %s", | |
61 | strerror(-r)); | |
62 | } | |
63 | ||
64 | return r; | |
65 | } | |
66 | ||
67 | int writer_init(Writer *s) { | |
68 | assert(s); | |
69 | ||
70 | s->journal = NULL; | |
71 | ||
72 | memset(&s->metrics, 0xFF, sizeof(s->metrics)); | |
73 | ||
74 | s->mmap = mmap_cache_new(); | |
75 | if (!s->mmap) | |
76 | return log_oom(); | |
77 | ||
78 | s->seqnum = 0; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | int writer_close(Writer *s) { | |
84 | if (s->journal) | |
85 | journal_file_close(s->journal); | |
86 | if (s->mmap) | |
87 | mmap_cache_unref(s->mmap); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | int writer_write(Writer *s, | |
92 | struct iovec_wrapper *iovw, | |
93 | dual_timestamp *ts, | |
94 | bool compress, | |
95 | bool seal) { | |
96 | int r; | |
97 | ||
98 | assert(s); | |
99 | assert(iovw); | |
100 | assert(iovw->count > 0); | |
101 | ||
102 | if (journal_file_rotate_suggested(s->journal, 0)) { | |
103 | log_info("%s: Journal header limits reached or header out-of-date, rotating", | |
104 | s->journal->path); | |
105 | r = do_rotate(&s->journal, compress, seal); | |
106 | if (r < 0) | |
107 | return r; | |
108 | } | |
109 | ||
110 | r = journal_file_append_entry(s->journal, ts, iovw->iovec, iovw->count, | |
111 | &s->seqnum, NULL, NULL); | |
112 | if (r >= 0) | |
113 | return 1; | |
114 | ||
115 | log_info("%s: Write failed, rotating", s->journal->path); | |
116 | r = do_rotate(&s->journal, compress, seal); | |
117 | if (r < 0) | |
118 | return r; | |
119 | ||
120 | log_debug("Retrying write."); | |
121 | r = journal_file_append_entry(s->journal, ts, iovw->iovec, iovw->count, | |
122 | &s->seqnum, NULL, NULL); | |
123 | return r < 0 ? r : 1; | |
124 | } |