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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <libgen.h>
#include "alloc-util.h"
#include "journal-remote.h"
#include "path-util.h"
#include "stat-util.h"
static int do_rotate(ManagedJournalFile **f, MMapCache *m, JournalFileFlags file_flags) {
int r;
r = managed_journal_file_rotate(f, m, file_flags, UINT64_MAX, NULL);
if (r < 0) {
if (*f)
log_error_errno(r, "Failed to rotate %s: %m", (*f)->file->path);
else
log_error_errno(r, "Failed to create rotated journal: %m");
}
return r;
}
int writer_new(RemoteServer *server, Writer **ret) {
_cleanup_(writer_unrefp) Writer *w = NULL;
int r;
assert(server);
assert(ret);
w = new(Writer, 1);
if (!w)
return -ENOMEM;
*w = (Writer) {
.n_ref = 1,
.metrics = server->metrics,
.server = server,
};
w->mmap = mmap_cache_new();
if (!w->mmap)
return -ENOMEM;
if (is_dir(server->output, /* follow = */ true) > 0) {
w->output = strdup(server->output);
if (!w->output)
return -ENOMEM;
} else {
r = path_extract_directory(server->output, &w->output);
if (r < 0)
return r;
}
*ret = TAKE_PTR(w);
return 0;
}
static Writer* writer_free(Writer *w) {
if (!w)
return NULL;
if (w->journal) {
log_debug("Closing journal file %s.", w->journal->file->path);
managed_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->output);
return mfree(w);
}
DEFINE_TRIVIAL_REF_UNREF_FUNC(Writer, writer, writer_free);
int writer_write(Writer *w,
const struct iovec_wrapper *iovw,
const dual_timestamp *ts,
const sd_id128_t *boot_id,
JournalFileFlags file_flags) {
int r;
assert(w);
assert(iovw);
assert(iovw->count > 0);
if (journal_file_rotate_suggested(w->journal->file, 0, LOG_DEBUG)) {
log_info("%s: Journal header limits reached or header out-of-date, rotating",
w->journal->file->path);
r = do_rotate(&w->journal, w->mmap, file_flags);
if (r < 0)
return r;
r = journal_directory_vacuum(w->output, w->metrics.max_use, w->metrics.n_max_files, 0, NULL, /* verbose = */ true);
if (r < 0)
return r;
}
r = journal_file_append_entry(
w->journal->file,
ts,
boot_id,
iovw->iovec,
iovw->count,
&w->seqnum,
/* seqnum_id= */ NULL,
/* ret_object= */ NULL,
/* ret_offset= */ NULL);
if (r >= 0) {
if (w->server)
w->server->event_count += 1;
return 0;
} else if (r == -EBADMSG)
return r;
log_debug_errno(r, "%s: Write failed, rotating: %m", w->journal->file->path);
r = do_rotate(&w->journal, w->mmap, file_flags);
if (r < 0)
return r;
else
log_debug("%s: Successfully rotated journal", w->journal->file->path);
r = journal_directory_vacuum(w->output, w->metrics.max_use, w->metrics.n_max_files, 0, NULL, /* verbose = */ true);
if (r < 0)
return r;
log_debug("Retrying write.");
r = journal_file_append_entry(
w->journal->file,
ts,
boot_id,
iovw->iovec, iovw->count,
&w->seqnum,
/* seqnum_id= */ NULL,
/* ret_object= */ NULL,
/* ret_offset= */ NULL);
if (r < 0)
return r;
if (w->server)
w->server->event_count += 1;
return 0;
}
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