src/basic/journal-importer.h

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