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fdfccdbc ZJS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2012 Zbigniew Jędrzejewski-Szmek | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
b5efdb8a | 20 | #include "alloc-util.h" |
9ff48d09 | 21 | #include "journal-remote.h" |
fdfccdbc ZJS |
22 | |
23 | int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) { | |
24 | if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1)) | |
25 | return log_oom(); | |
26 | ||
27 | iovw->iovec[iovw->count++] = (struct iovec) {data, len}; | |
28 | return 0; | |
29 | } | |
30 | ||
31 | void iovw_free_contents(struct iovec_wrapper *iovw) { | |
a1e58e8e | 32 | iovw->iovec = mfree(iovw->iovec); |
fdfccdbc ZJS |
33 | iovw->size_bytes = iovw->count = 0; |
34 | } | |
35 | ||
36 | size_t iovw_size(struct iovec_wrapper *iovw) { | |
37 | size_t n = 0, i; | |
38 | ||
92b10cbc | 39 | for (i = 0; i < iovw->count; i++) |
fdfccdbc ZJS |
40 | n += iovw->iovec[i].iov_len; |
41 | ||
42 | return n; | |
43 | } | |
44 | ||
92b10cbc ZJS |
45 | void iovw_rebase(struct iovec_wrapper *iovw, char *old, char *new) { |
46 | size_t i; | |
47 | ||
48 | for (i = 0; i < iovw->count; i++) | |
49 | iovw->iovec[i].iov_base = (char*) iovw->iovec[i].iov_base - old + new; | |
50 | } | |
51 | ||
fdfccdbc ZJS |
52 | /********************************************************************** |
53 | ********************************************************************** | |
54 | **********************************************************************/ | |
55 | ||
56 | static int do_rotate(JournalFile **f, bool compress, bool seal) { | |
b58c888f | 57 | int r = journal_file_rotate(f, compress, seal, NULL); |
fdfccdbc ZJS |
58 | if (r < 0) { |
59 | if (*f) | |
c33b3297 | 60 | log_error_errno(r, "Failed to rotate %s: %m", (*f)->path); |
fdfccdbc | 61 | else |
c33b3297 | 62 | log_error_errno(r, "Failed to create rotated journal: %m"); |
fdfccdbc ZJS |
63 | } |
64 | ||
65 | return r; | |
66 | } | |
67 | ||
9ff48d09 ZJS |
68 | Writer* writer_new(RemoteServer *server) { |
69 | Writer *w; | |
fdfccdbc | 70 | |
9ff48d09 ZJS |
71 | w = new0(Writer, 1); |
72 | if (!w) | |
73 | return NULL; | |
fdfccdbc | 74 | |
9ff48d09 | 75 | memset(&w->metrics, 0xFF, sizeof(w->metrics)); |
fdfccdbc | 76 | |
9ff48d09 | 77 | w->mmap = mmap_cache_new(); |
6b430fdb ZJS |
78 | if (!w->mmap) |
79 | return mfree(w); | |
fdfccdbc | 80 | |
9ff48d09 ZJS |
81 | w->n_ref = 1; |
82 | w->server = server; | |
fdfccdbc | 83 | |
9ff48d09 | 84 | return w; |
fdfccdbc ZJS |
85 | } |
86 | ||
9ff48d09 ZJS |
87 | Writer* writer_free(Writer *w) { |
88 | if (!w) | |
89 | return NULL; | |
90 | ||
91 | if (w->journal) { | |
92 | log_debug("Closing journal file %s.", w->journal->path); | |
93 | journal_file_close(w->journal); | |
eacbb4d3 | 94 | } |
9ff48d09 | 95 | |
dd87b184 ZJS |
96 | if (w->server && w->hashmap_key) |
97 | hashmap_remove(w->server->writers, w->hashmap_key); | |
9ff48d09 ZJS |
98 | |
99 | free(w->hashmap_key); | |
100 | ||
101 | if (w->mmap) | |
102 | mmap_cache_unref(w->mmap); | |
103 | ||
6b430fdb | 104 | return mfree(w); |
9ff48d09 ZJS |
105 | } |
106 | ||
107 | Writer* writer_unref(Writer *w) { | |
108 | if (w && (-- w->n_ref <= 0)) | |
109 | writer_free(w); | |
110 | ||
111 | return NULL; | |
fdfccdbc ZJS |
112 | } |
113 | ||
9ff48d09 ZJS |
114 | Writer* writer_ref(Writer *w) { |
115 | if (w) | |
116 | assert_se(++ w->n_ref >= 2); | |
117 | ||
118 | return w; | |
119 | } | |
120 | ||
dd87b184 | 121 | int writer_write(Writer *w, |
fdfccdbc ZJS |
122 | struct iovec_wrapper *iovw, |
123 | dual_timestamp *ts, | |
124 | bool compress, | |
125 | bool seal) { | |
126 | int r; | |
127 | ||
dd87b184 | 128 | assert(w); |
fdfccdbc ZJS |
129 | assert(iovw); |
130 | assert(iovw->count > 0); | |
131 | ||
dd87b184 | 132 | if (journal_file_rotate_suggested(w->journal, 0)) { |
fdfccdbc | 133 | log_info("%s: Journal header limits reached or header out-of-date, rotating", |
dd87b184 ZJS |
134 | w->journal->path); |
135 | r = do_rotate(&w->journal, compress, seal); | |
fdfccdbc ZJS |
136 | if (r < 0) |
137 | return r; | |
138 | } | |
139 | ||
dd87b184 ZJS |
140 | r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count, |
141 | &w->seqnum, NULL, NULL); | |
142 | if (r >= 0) { | |
143 | if (w->server) | |
144 | w->server->event_count += 1; | |
fdfccdbc | 145 | return 1; |
dd87b184 | 146 | } |
fdfccdbc | 147 | |
da927ba9 | 148 | log_debug_errno(r, "%s: Write failed, rotating: %m", w->journal->path); |
dd87b184 | 149 | r = do_rotate(&w->journal, compress, seal); |
fdfccdbc ZJS |
150 | if (r < 0) |
151 | return r; | |
a83f4037 | 152 | else |
0e72da6f | 153 | log_debug("%s: Successfully rotated journal", w->journal->path); |
fdfccdbc ZJS |
154 | |
155 | log_debug("Retrying write."); | |
dd87b184 ZJS |
156 | r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count, |
157 | &w->seqnum, NULL, NULL); | |
158 | if (r < 0) | |
159 | return r; | |
160 | ||
161 | if (w->server) | |
162 | w->server->event_count += 1; | |
163 | return 1; | |
fdfccdbc | 164 | } |