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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "journal-remote.h"
int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) {
if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1))
return log_oom();
iovw->iovec[iovw->count++] = (struct iovec) {data, len};
return 0;
}
void iovw_free_contents(struct iovec_wrapper *iovw) {
free(iovw->iovec);
iovw->iovec = NULL;
iovw->size_bytes = iovw->count = 0;
}
size_t iovw_size(struct iovec_wrapper *iovw) {
size_t n = 0, i;
for (i = 0; i < iovw->count; i++)
n += iovw->iovec[i].iov_len;
return n;
}
void iovw_rebase(struct iovec_wrapper *iovw, char *old, char *new) {
size_t i;
for (i = 0; i < iovw->count; i++)
iovw->iovec[i].iov_base = (char*) iovw->iovec[i].iov_base - old + new;
}
/**********************************************************************
**********************************************************************
**********************************************************************/
static int do_rotate(JournalFile **f, bool compress, bool seal) {
int r = journal_file_rotate(f, compress, seal);
if (r < 0) {
if (*f)
log_error("Failed to rotate %s: %s", (*f)->path,
strerror(-r));
else
log_error("Failed to create rotated journal: %s",
strerror(-r));
}
return r;
}
Writer* writer_new(RemoteServer *server) {
Writer *w;
w = new0(Writer, 1);
if (!w)
return NULL;
memset(&w->metrics, 0xFF, sizeof(w->metrics));
w->mmap = mmap_cache_new();
if (!w->mmap) {
free(w);
return NULL;
}
w->n_ref = 1;
w->server = server;
return w;
}
Writer* writer_free(Writer *w) {
if (!w)
return NULL;
if (w->journal) {
log_debug("Closing journal file %s.", w->journal->path);
journal_file_close(w->journal);
}
if (w->server && w->hashmap_key)
hashmap_remove(w->server->writers, w->hashmap_key);
free(w->hashmap_key);
if (w->mmap)
mmap_cache_unref(w->mmap);
free(w);
return NULL;
}
Writer* writer_unref(Writer *w) {
if (w && (-- w->n_ref <= 0))
writer_free(w);
return NULL;
}
Writer* writer_ref(Writer *w) {
if (w)
assert_se(++ w->n_ref >= 2);
return w;
}
int writer_write(Writer *w,
struct iovec_wrapper *iovw,
dual_timestamp *ts,
bool compress,
bool seal) {
int r;
assert(w);
assert(iovw);
assert(iovw->count > 0);
if (journal_file_rotate_suggested(w->journal, 0)) {
log_info("%s: Journal header limits reached or header out-of-date, rotating",
w->journal->path);
r = do_rotate(&w->journal, compress, seal);
if (r < 0)
return r;
}
r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count,
&w->seqnum, NULL, NULL);
if (r >= 0) {
if (w->server)
w->server->event_count += 1;
return 1;
}
log_debug_errno(-r, "%s: Write failed, rotating: %m", w->journal->path);
r = do_rotate(&w->journal, compress, seal);
if (r < 0)
return r;
else
log_info("%s: Successfully rotated journal", w->journal->path);
log_debug("Retrying write.");
r = journal_file_append_entry(w->journal, ts, iovw->iovec, iovw->count,
&w->seqnum, NULL, NULL);
if (r < 0)
return r;
if (w->server)
w->server->event_count += 1;
return 1;
}
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