57850536d5
Previously the compression threshold was hardcoded to 512, which meant that smaller values wouldn't be compressed. This left some storage savings on the table, so instead, we make that number tunable.
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2012 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "alloc-util.h"
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#include "journal-remote.h"
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static int do_rotate(JournalFile **f, bool compress, bool seal) {
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int r = journal_file_rotate(f, compress, (uint64_t) -1, seal, NULL);
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if (r < 0) {
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if (*f)
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log_error_errno(r, "Failed to rotate %s: %m", (*f)->path);
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else
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log_error_errno(r, "Failed to create rotated journal: %m");
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}
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return r;
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}
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Writer* writer_new(RemoteServer *server) {
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Writer *w;
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w = new0(Writer, 1);
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if (!w)
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return NULL;
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memset(&w->metrics, 0xFF, sizeof(w->metrics));
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w->mmap = mmap_cache_new();
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if (!w->mmap)
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return mfree(w);
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w->n_ref = 1;
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w->server = server;
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return w;
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}
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Writer* writer_free(Writer *w) {
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if (!w)
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return NULL;
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if (w->journal) {
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log_debug("Closing journal file %s.", w->journal->path);
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journal_file_close(w->journal);
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}
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if (w->server && w->hashmap_key)
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hashmap_remove(w->server->writers, w->hashmap_key);
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free(w->hashmap_key);
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if (w->mmap)
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mmap_cache_unref(w->mmap);
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return mfree(w);
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}
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Writer* writer_unref(Writer *w) {
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if (w && (-- w->n_ref <= 0))
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writer_free(w);
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return NULL;
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}
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Writer* writer_ref(Writer *w) {
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if (w)
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assert_se(++ w->n_ref >= 2);
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return w;
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}
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int writer_write(Writer *w,
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struct iovec_wrapper *iovw,
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dual_timestamp *ts,
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bool compress,
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bool seal) {
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int r;
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assert(w);
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assert(iovw);
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assert(iovw->count > 0);
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if (journal_file_rotate_suggested(w->journal, 0)) {
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log_info("%s: Journal header limits reached or header out-of-date, rotating",
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w->journal->path);
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r = do_rotate(&w->journal, compress, seal);
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if (r < 0)
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return r;
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}
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r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count,
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&w->seqnum, NULL, NULL);
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if (r >= 0) {
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if (w->server)
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w->server->event_count += 1;
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return 1;
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}
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log_debug_errno(r, "%s: Write failed, rotating: %m", w->journal->path);
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r = do_rotate(&w->journal, compress, seal);
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if (r < 0)
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return r;
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else
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log_debug("%s: Successfully rotated journal", w->journal->path);
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log_debug("Retrying write.");
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r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count,
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&w->seqnum, NULL, NULL);
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if (r < 0)
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return r;
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if (w->server)
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w->server->event_count += 1;
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return 1;
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}
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