diff options
Diffstat (limited to 'src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c')
| -rw-r--r-- | src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c new file mode 100644 index 0000000000..31abdc76d2 --- /dev/null +++ b/src/grp-journal/grp-remote/systemd-journal-remote/journal-remote-write.c @@ -0,0 +1,169 @@ +/*** + 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 "systemd-basic/alloc-util.h" + +#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) { + iovw->iovec = mfree(iovw->iovec); + 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, NULL); + if (r < 0) { + if (*f) + log_error_errno(r, "Failed to rotate %s: %m", (*f)->path); + else + log_error_errno(r, "Failed to create rotated journal: %m"); + } + + 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_debug("%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; +} |