This bug is a classic case of being lazy:
1. peer_accept_channel() allocated its return off the input message,
rather than taking an explicit allocation context. This concealed the
lifetime nature of the return.
2. The context for sanitize_error was the error itself, rather than the
more obvious tmpctx (connect_failed does not take).
The global tmpctx removes the "efficiency" excuse for grabbing a random
object to use as context, and is also nice and explicit.
All-the-hard-work-by: @ZmnSCPxj
As we add more features, the current code is insufficient.
1. Keep an array of single feature bits, for easy switching on and off.
2. Create feature_offered() which checks for both compulsory and optional
variants.
3. Invert requires_unsupported_features() and unsupported_features()
which tend to be double-negative, all_supported_features() and
features_supported().
4. Move single feature definition from wire/peer_wire.h to common/features.h.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This simplifies things, and means it's always in the database. Our
previous approach to creating it on the fly had holes when it was
created for onchaind, causing us to use another every time we
restarted.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I leave all the now-unnecessary accessors in place to avoid churn, but
the use of bitfields has been more pain than help.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The billboard is now far more useful to tell what's going on, and this
gets us closer to a state == owner mapping.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We always hand in "NULL" (which means use tal_len on the msg), except
for two places which do that manually for no good reason.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We also fold opening_got_hsm_funding_sig() into the caller; it was
previously a callback before we decided to always use the HSM
synchronously.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Because peer_failed would previously drop the connection, we had a
special 'negotiation_failed' message which made the master hand it
back to gossipd. We don't need that any more.
This also meant we no longer need a special hook in read_peer_msg
for openingd to send this message.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
And now we can finally do the db upgrade to remove any OPENINGD
channels once, since we never put them back.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
It's giant, but it's encapsulating at least. It is called from the wallet
code when loading channels, or from the opening code when converting
an uncommitted_channel.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Now any struct channel is a genuine channel, the following fields are
always valid:
1. funding_txid: doesn't need to be a pointer.
2. our_msatoshi: doesn't need to be a pointer.
3. last_sig: doesn't need to be a pointer.
4. channel_info: doesn't need to be a pointer.
In addition, 'last_tx' is always valid.
The main effect is to remove a whole heap of branches from the wallet code.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Each peer can have one 'uncommitted' channel, which is in the process
of opening. This is used for openingd, and then on return we convert
it into a full-fledged struct channel and commit it into the database.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This means the caller needs to supply an explicit log to base the
subd log on, and also a callback for error handling.
The callback is kind of ugly, but it gets reworked towards the end
of this series.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Once we rely on the logbook outlasting the peer, we can't refer to the
peer from the logbook function:
Valgrind error file: valgrind-errors.26567
==26567== Invalid read of size 8
==26567== at 0x126297: copy_to_parent_log (peer_control.c:690)
==26567== by 0x11C06B: maybe_print (log.c:253)
==26567== by 0x11C145: logv (log.c:270)
==26567== by 0x11C448: log_ (log.c:319)
==26567== by 0x132951: destroy_subd (subd.c:537)
==26567== by 0x179C19: notify (tal.c:240)
==26567== by 0x17A0CE: del_tree (tal.c:400)
==26567== by 0x17A120: del_tree (tal.c:410)
==26567== by 0x17A4ED: tal_free (tal.c:509)
==26567== by 0x16DEB5: io_close (io.c:443)
==26567== by 0x1328BC: sd_msg_read (subd.c:516)
==26567== by 0x1320AC: read_fds (subd.c:328)
==26567== Address 0x6cf9ca0 is 48 bytes inside a block of size 216 free'd
==26567== at 0x4C30D3B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==26567== by 0x17A1A9: del_tree (tal.c:421)
==26567== by 0x17A4ED: tal_free (tal.c:509)
==26567== by 0x124B6C: delete_peer (peer_control.c:180)
==26567== by 0x12B369: destroy_uncommitted_channel (peer_control.c:2505)
==26567== by 0x179C19: notify (tal.c:240)
==26567== by 0x17A0CE: del_tree (tal.c:400)
==26567== by 0x17A4ED: tal_free (tal.c:509)
==26567== by 0x12B31E: opening_channel_errmsg (peer_control.c:2496)
==26567== by 0x13243A: handle_peer_error (subd.c:407)
==26567== by 0x1326E4: sd_msg_read (subd.c:472)
==26567== by 0x1320AC: read_fds (subd.c:328)
==26567== Block was alloc'd at
==26567== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==26567== by 0x179C83: allocate (tal.c:250)
==26567== by 0x17A250: tal_alloc_ (tal.c:448)
==26567== by 0x124950: new_peer (peer_control.c:151)
==26567== by 0x12B3EC: new_uncommitted_channel (peer_control.c:2521)
==26567== by 0x12B5C5: peer_accept_channel (peer_control.c:2569)
==26567== by 0x126099: peer_sent_nongossip (peer_control.c:641)
==26567== by 0x113B28: peer_nongossip (gossip_control.c:55)
==26567== by 0x113D9D: gossip_msg (gossip_control.c:144)
==26567== by 0x132783: sd_msg_read (subd.c:487)
==26567== by 0x1320AC: read_fds (subd.c:328)
==26567== by 0x16D1FE: next_plan (io.c:59)
==26567==
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
BackgroundL Each log has a log_book: many logs can share the same one,
as each one can have a separate prefix.
Testing tickled a bug at the end of this series, where subd was
logging to the peer's log_book on shutdown, but the peer was already
freed. We've already had issues with logging while lightningd is
shutting down.
There are times when reference counting really is the right answer,
this seems to be one of them: the 'struct log' share the 'struct
log_book' and the last 'struct log' cleans it up.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We derive the seed from this, so it needs to be unique, but using
rowid forced us to put the channel into the db early, before it
was ready.
Instead, use a counter to ensure uniqueness, initialized when we load
existing peers. This doesn't need to touch the database at all.
As we now have only two places where the channel is committed (the
funder and fundee paths), so we create a new explicit
'wallet_channel_insert()' function: 'wallet_channel_save()' now just
updates.
Note that this also fixes some weirdness in
wallet_channels_load_active: we strangely avoided loading channels in
CLOSINGD_COMPLETE (which fortunately was a transient state, so
unlikely anyone hit this). Note that since the lines above already
delete all the OPENINGD channels, we now simply load them all.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This provides a sanity check that we are in sync, and also keeps the
logic in the program and out of the SQL.
Since the destructor now doesn't clean up the peer, there are some
wider changes to be made when cleaning up. Most notably we create
lots of channels in run-wallet.c and they previously freed the peer:
now we need free the peer explicitly, so we need to free them first.
Suggested-by: @cdecker
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
And return the correct error message for the channel they give, if
they try to re-establish on an error channel.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
practicalswift
ZmnSCPxj, ZmnSCPxj jxPCSmnZ
Rusty Russell
John Barboza
Christian Decker