src/journal-remote/journal-remote-parse.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2014 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
  20 #include "alloc-util.h"
  21 #include "fd-util.h"
  22 #include "journal-remote-parse.h"
  23 #include "journald-native.h"
  24 #include "parse-util.h"
  25 #include "string-util.h"
  26
  27 void source_free(RemoteSource *source) {
  28         if (!source)
  29                 return;
  30
  31         journal_importer_cleanup(&source->importer);
  32
  33         log_debug("Writer ref count %i", source->writer->n_ref);
  34         writer_unref(source->writer);
  35
  36         sd_event_source_unref(source->event);
  37         sd_event_source_unref(source->buffer_event);
  38
  39         free(source);
  40 }
  41
  42 /**
  43  * Initialize zero-filled source with given values. On success, takes
  44  * ownership of fd, name, and writer, otherwise does not touch them.
  45  */
  46 RemoteSource* source_new(int fd, bool passive_fd, char *name, Writer *writer) {
  47
  48         RemoteSource *source;
  49
  50         log_debug("Creating source for %sfd:%d (%s)",
  51                   passive_fd ? "passive " : "", fd, name);
  52
  53         assert(fd >= 0);
  54
  55         source = new0(RemoteSource, 1);
  56         if (!source)
  57                 return NULL;
  58
  59         source->importer.fd = fd;
  60         source->importer.passive_fd = passive_fd;
  61         source->importer.name = name;
  62
  63         source->writer = writer;
  64
  65         return source;
  66 }
  67
  68 int process_source(RemoteSource *source, bool compress, bool seal) {
  69         int r;
  70
  71         assert(source);
  72         assert(source->writer);
  73
  74         r = journal_importer_process_data(&source->importer);
  75         if (r <= 0)
  76                 return r;
  77
  78         /* We have a full event */
  79         log_trace("Received full event from source@%p fd:%d (%s)",
  80                   source, source->importer.fd, source->importer.name);
  81
  82         if (source->importer.iovw.count == 0) {
  83                 log_warning("Entry with no payload, skipping");
  84                 goto freeing;
  85         }
  86
  87         assert(source->importer.iovw.iovec);
  88
  89         r = writer_write(source->writer, &source->importer.iovw, &source->importer.ts, compress, seal);
  90         if (r < 0)
  91                 log_error_errno(r, "Failed to write entry of %zu bytes: %m",
  92                                 iovw_size(&source->importer.iovw));
  93         else
  94                 r = 1;
  95
  96  freeing:
  97         journal_importer_drop_iovw(&source->importer);
  98         return r;
  99 }