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gossipd: fix crash if we truncate store.

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Entries we've already loaded expect to exist in the store.  We could go
back and remove them all, but instead just truncate at the known-good
point.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-05-01 09:47:37 +09:30 committed by Christian Decker
parent c96cc8a444
commit 0ca0db765a
1 changed files with 2 additions and 2 deletions
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4
gossipd/gossip_store.c
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@ -550,13 +550,13 @@ void gossip_store_load(struct routing_state *rstate, struct gossip_store *gs)
truncate:
status_unusual("gossip_store: %s (%s) truncating to %"PRIu64,
bad, tal_hex(msg, msg), (u64)1);
bad, tal_hex(msg, msg), gs->len);
truncate_nomsg:
/* FIXME: We would like to truncate to known_good, except we would
* miss channel_delete msgs. If we put block numbers into the store
* as we process them, we can know how far we need to roll back if we
* truncate the store */
if (ftruncate(gs->fd, 1) != 0)
if (ftruncate(gs->fd, gs->len) != 0)
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Truncating store: %s", strerror(errno));
out: