Commit Graph

11 Commits

Author SHA1 Message Date
Jakob Borg
744ef0d8ac
lib/protocol: Avoid data loss on database wipe by higher version numbers (fixes #3876) (#6605)
This makes version vector values clock based instead of just incremented
from zero. The effect is that a vector that is created from scratch
(after database reset) will have a higher value for the local device
than what it could have been previously, causing a conflict. That is, if
we are A and we had

    {A: 42, B: 12}

in the old scheme, a reset and rescan would give us

    {A: 1}

which is a strict ancestor of the older file (this might be wrong). With
the new scheme we would instead have

    {A: someClockTime, b: otherClockTime}

and the new version after reset would become

    {A: someClockTime+delta}

which is in conflict with the previous entry (better).
In case the clocks are wrong (current time is less than the value in the
vector) we fall back to just simple increment like today.

This scheme is ineffective if we suffer a database reset while at the
same time setting the clock back far into the past. It's however no
worse than what we already do.

This loses the ability to emit the "added" event, as we can't look for
the magic 1 entry any more. That event was however already broken
(#5541).

Another place where we infer meaning from the vector itself is in
receive only folders, but there the only criteria is that the vector is
one item long and includes just ourselves, which remains the case with
this change.

* wip
2020-05-06 08:47:02 +02:00
Jakob Borg
944ddcf768
all: Become a Go module (fixes #5148) (#5384)
* go mod init; rm -rf vendor

* tweak proto files and generation

* go mod vendor

* clean up build.go

* protobuf literals in tests

* downgrade gogo/protobuf
2018-12-18 12:36:38 +01:00
Simon Frei
158859a1e2 lib: Handle metadata changes for send-only folders (fixes #4616, fixes #4627) (#4750)
Unignored files are marked as conflicting while scanning, which is then resolved
in the subsequent pull. Automatically reconciles needed items on send-only
folders, if they do not actually differ except for internal metadata.
2018-02-25 09:39:00 +01:00
Jakob Borg
fa0101bd60 lib/protocol, lib/discover, lib/db: Use protocol buffer serialization (fixes #3080)
This changes the BEP protocol to use protocol buffer serialization
instead of XDR, and therefore also the database format. The local
discovery protocol is also updated to be protocol buffer format.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3276
LGTM: AudriusButkevicius
2016-07-04 10:40:29 +00:00
Nate Morrison
86ca58e2a9 lib/model: Emit LocalDiskUpdated events on detecting local changes
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3055
2016-05-19 00:19:26 +00:00
Jakob Borg
6f743f3138 Revert "lib/model: Emit LocalDiskUpdated events on detecting local changes"
This reverts commit 5a7fad0bcd.
2016-05-14 10:55:24 +02:00
Nate Morrison
5a7fad0bcd lib/model: Emit LocalDiskUpdated events on detecting local changes
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3055
2016-05-14 08:37:07 +00:00
Jakob Borg
11d4986517 Humanize serialization of version vectors (again) 2016-01-20 11:14:08 -08:00
Jakob Borg
fbf911cf7e Unbreak comments 2015-09-22 21:51:05 +02:00
Jakob Borg
7fdfa81fb8 Fix vet and lint complaints 2015-09-22 20:34:24 +02:00
Jakob Borg
4316992d95 Add 'lib/protocol/' from commit 'f91191218b192ace841c878f161832d19c09145a'
git-subtree-dir: lib/protocol
git-subtree-mainline: 5ecb8bdd8a
git-subtree-split: f91191218b
2015-09-22 19:34:29 +02:00