src/shared/journal-importer.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #pragma once
   4
   5 #include <stddef.h>
   6 #include <stdbool.h>
   7 #include <sys/uio.h>
   8
   9 #include "sd-id128.h"
  10
  11 #include "time-util.h"
  12
  13 /* Make sure not to make this smaller than the maximum coredump size.
  14  * See JOURNAL_SIZE_MAX in coredump.c */
  15 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
  16 #define ENTRY_SIZE_MAX (1024*1024*770u)
  17 #define DATA_SIZE_MAX (1024*1024*768u)
  18 #else
  19 #define ENTRY_SIZE_MAX (1024*1024*13u)
  20 #define DATA_SIZE_MAX (1024*1024*11u)
  21 #endif
  22 #define LINE_CHUNK 8*1024u
  23
  24 /* The maximum number of fields in an entry */
  25 #define ENTRY_FIELD_COUNT_MAX 1024
  26
  27 struct iovec_wrapper {
  28         struct iovec *iovec;
  29         size_t size_bytes;
  30         size_t count;
  31 };
  32
  33 size_t iovw_size(struct iovec_wrapper *iovw);
  34
  35 typedef struct JournalImporter {
  36         int fd;
  37         bool passive_fd;
  38         char *name;
  39
  40         char *buf;
  41         size_t size;       /* total size of the buffer */
  42         size_t offset;     /* offset to the beginning of live data in the buffer */
  43         size_t scanned;    /* number of bytes since the beginning of data without a newline */
  44         size_t filled;     /* total number of bytes in the buffer */
  45
  46         size_t field_len;  /* used for binary fields: the field name length */
  47         size_t data_size;  /* and the size of the binary data chunk being processed */
  48
  49         struct iovec_wrapper iovw;
  50
  51         int state;
  52         dual_timestamp ts;
  53         sd_id128_t boot_id;
  54 } JournalImporter;
  55
  56 void journal_importer_cleanup(JournalImporter *);
  57 int journal_importer_process_data(JournalImporter *);
  58 int journal_importer_push_data(JournalImporter *, const char *data, size_t size);
  59 void journal_importer_drop_iovw(JournalImporter *);
  60 bool journal_importer_eof(const JournalImporter *);
  61
  62 static inline size_t journal_importer_bytes_remaining(const JournalImporter *imp) {
  63         return imp->filled;
  64 }