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Added journaling when a file is saved - beginning of backup scheme

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This commit is contained in:
jmjatlanta 2017-08-21 14:49:21 -05:00
parent 5b242a2d08
commit d13e4b4318
11 changed files with 346 additions and 45 deletions
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33
include/ipfs/repo/fsrepo/journalstore.h Normal file
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@ -0,0 +1,33 @@
#pragma once
/**
* Piggyback on the datastore to access the journal entries
*/
#include <stdint.h>
#include <stdlib.h>
#include "libp2p/db/datastore.h"
struct JournalRecord {
unsigned long long timestamp;
int pin;
uint8_t *hash;
size_t hash_size;
};
/**
* Open a cursor to the journalstore table
*/
int repo_journalstore_cursor_open(struct Datastore* datastore, void** cursor);
/**
* Read a record from the cursor
*/
int repo_journalstore_cursor_get(struct Datastore* datastore, void* cursor, enum DatastoreCursorOp op, struct JournalRecord** record);
/**
* Close the cursor
*/
int repo_cournalstore_cursor_close(struct Datastore* datastore, void* cursor);
int journal_record_free(struct JournalRecord* rec);

14
include/ipfs/repo/fsrepo/lmdb_datastore.h
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@ -1,8 +1,16 @@
#ifndef __FS_REPO_LMDB_DATASTORE_H__
#define __FS_REPO_LMDB_DATASTORE_H__
#pragma once
#include "lmdb.h"
#include "libp2p/db/datastore.h"
static const char* DATASTORE_DB = "DATASTORE";
static const char* JOURNAL_DB = "JOURNAL";
struct lmdb_trans_cursor {
MDB_txn* transaction;
MDB_cursor* cursor;
};
/***
* Places the LMDB methods into the datastore's function pointers
* @param datastore the datastore to fill
@ -33,5 +41,3 @@ int repo_fsrepo_lmdb_close(struct Datastore* datastore);
* @returns true(1) on success
*/
int repo_fsrepo_lmdb_create_directory(struct Datastore* datastore);
#endif