Commit Graph

12 Commits

Author SHA1 Message Date
Joe Thornber
9e20465fd1 [thin-repair, thin_dump] When repairing we now hunt for the best btree roots.
We've had a trickle of users who accidentally activate the same pool on a
VM and host at the same time.  Typically the host doesn't do any IO, but
the kernel will still rewrite the superblock on shutdown.  This leaves
the superblock pointing to very out of date btree roots and so we get
massive metadata loss.

This patch changes thin_repair, and thin_dump --repair.  They now hunt
for the most recent, undamaged and consistent roots of the device and
mapping trees, and use that as the starting point of the repair.
2019-04-17 12:17:13 +01:00
Joe Thornber
c2fdbad322 Merge branch '2016-07-07-improve-thin-repair-error-message' into v0.7-devel
Conflicts:
	Makefile.in
	VERSION
	configure.ac
	persistent-data/file_utils.cc
2016-07-11 15:51:30 +01:00
Joe Thornber
4779fb9b80 [various] Improve documentation
Output file must be preallocated.
2016-07-11 14:53:03 +01:00
Joe Thornber
a3f4940f1e [thin_dump] --dev-id 2016-03-22 14:46:33 +00:00
Joe Thornber
b0e2d0e6a0 [thin_repair, metadata] Try harder to get the number of data blocks
when opening the metadata.
2016-03-21 17:17:57 +00:00
Joe Thornber
2cf0c84ce3 [thin_repair] we need to read the space maps after all to get the data
volume size.
2016-03-21 15:36:49 +00:00
Joe Thornber
2815aeace9 [thin_repair] fix regression in thin_repair
When opening the corrupted metadata we don't need to touch the space
maps.  This used to be achieved by pretending we were opening a
metadata snap at block 0 (superblock location).  But got changed in
the recent rationalisation of the metadata constructors.

This patch introduces a bool to the metadata OPEN constructor that
says whether the space maps are needed or not.
2016-02-16 14:08:43 +00:00
Joe Thornber
c93e728ef4 [base] introduce a command type that gets registered with the app 2016-01-08 12:51:52 +00:00
Joe Thornber
30a3bf67d1 [thin tools] Change the metadata contructors to take a block_manager<>::ptr
Also check any metadata snap passed in matches what's in the superblock.
2015-12-14 15:29:57 +00:00
Joe Thornber
6f8b7e2914 [all] Build a single executable 2014-08-27 14:01:31 +01:00
Joe Thornber
dd26ec76b2 [thin_repair] don't open the space maps in the old metadata, we'll regenerate. 2013-08-02 13:14:49 +01:00
Joe Thornber
21074456ca thin_repair 2013-06-19 12:39:28 +01:00