src/basic/journal-importer.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2016 Zbigniew Jędrzejewski-Szmek
   6 ***/
   7
   8 #pragma once
   9
  10 #include <stddef.h>
  11 #include <stdbool.h>
  12 #include <sys/uio.h>
  13
  14 #include "sd-id128.h"
  15
  16 #include "time-util.h"
  17
  18 /* Make sure not to make this smaller than the maximum coredump size.
  19  * See COREDUMP_MAX in coredump.c */
  20 #define ENTRY_SIZE_MAX (1024*1024*770u)
  21 #define DATA_SIZE_MAX (1024*1024*768u)
  22 #define LINE_CHUNK 8*1024u
  23
  24 struct iovec_wrapper {
  25         struct iovec *iovec;
  26         size_t size_bytes;
  27         size_t count;
  28 };
  29
  30 size_t iovw_size(struct iovec_wrapper *iovw);
  31
  32 typedef struct JournalImporter {
  33         int fd;
  34         bool passive_fd;
  35         char *name;
  36
  37         char *buf;
  38         size_t size;       /* total size of the buffer */
  39         size_t offset;     /* offset to the beginning of live data in the buffer */
  40         size_t scanned;    /* number of bytes since the beginning of data without a newline */
  41         size_t filled;     /* total number of bytes in the buffer */
  42
  43         size_t field_len;  /* used for binary fields: the field name length */
  44         size_t data_size;  /* and the size of the binary data chunk being processed */
  45
  46         struct iovec_wrapper iovw;
  47
  48         int state;
  49         dual_timestamp ts;
  50         sd_id128_t boot_id;
  51 } JournalImporter;
  52
  53 void journal_importer_cleanup(JournalImporter *);
  54 int journal_importer_process_data(JournalImporter *);
  55 int journal_importer_push_data(JournalImporter *, const char *data, size_t size);
  56 void journal_importer_drop_iovw(JournalImporter *);
  57 bool journal_importer_eof(const JournalImporter *);
  58
  59 static inline size_t journal_importer_bytes_remaining(const JournalImporter *imp) {
  60         return imp->filled;
  61 }