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gossip: Introduce bookkeeping into gossip_store for rewrite

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Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2018-05-29 14:39:37 +02:00
parent 552ddb8dfd
commit eaba5a249a
1 changed files with 17 additions and 1 deletions
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18
gossipd/gossip_store.c
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@ -13,15 +13,21 @@
#include <wire/wire.h>
#define GOSSIP_STORE_FILENAME "gossip_store"
#define MAX_COUNT_TO_STALE_RATE 10
static u8 gossip_store_version = 0x02;
struct gossip_store {
int fd;
u8 version;
/* Counters for entries in the gossip_store entries. This is used to
* decide whether we should rewrite the on-disk store or not */
size_t count;
/* The broadcast struct we source messages from when rewriting the
* gossip_store */
struct broadcast_state *broadcast;
};
static void gossip_store_destroy(struct gossip_store *gs)
@ -33,6 +39,7 @@ struct gossip_store *gossip_store_new(const tal_t *ctx,
struct broadcast_state *broadcast)
{
struct gossip_store *gs = tal(ctx, struct gossip_store);
gs->count = 0;
gs->fd = open(GOSSIP_STORE_FILENAME, O_RDWR|O_APPEND|O_CREAT, 0600);
gs->broadcast = broadcast;
@ -71,6 +78,7 @@ static void gossip_store_append(struct gossip_store *gs, const u8 *msg)
{
u32 msglen = tal_len(msg);
beint32_t checksum, belen = cpu_to_be32(msglen);
size_t stale;
/* Only give error message once. */
if (gs->fd == -1)
@ -86,9 +94,16 @@ static void gossip_store_append(struct gossip_store *gs, const u8 *msg)
strerror(errno));
gs->fd = -1;
}
gs->count++;
stale = gs->count - gs->broadcast->count;
if (gs->count >= 100 && stale * MAX_COUNT_TO_STALE_RATE > gs->count) {
/* FIXME(cdecker) Implement rewriting of gossip_store */
}
}
void gossip_store_add_channel_announcement(struct gossip_store *gs, const u8 *gossip_msg, u64 satoshis)
void gossip_store_add_channel_announcement(struct gossip_store *gs,
const u8 *gossip_msg, u64 satoshis)
{
u8 *msg = towire_gossip_store_channel_announcement(NULL, gossip_msg, satoshis);
gossip_store_append(gs, msg);
@ -200,6 +215,7 @@ void gossip_store_load(struct routing_state *rstate, struct gossip_store *gs)
goto truncate;
}
known_good += sizeof(belen) + msglen;
gs->count++;
tal_free(msg);
}
goto out;