github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-30 18:13:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

btrfs: add a comment for new_bytenr in backref_cache_node

Browse Source 
Add a comment for this field so we know what it is used for.  Previously
we used it to update the backref cache, so people may mistakenly think
it is useless, but in fact exists to make sure the backref cache makes
sense.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2024-10-03 11:43:05 -04:00 committed by David Sterba
parent b1d4d5d1d8
commit cb7de8ee9c
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/btrfs/backref.h
View File

@ -318,6 +318,12 @@ struct btrfs_backref_node {
u64 bytenr;
}; /* Use rb_simple_node for search/insert */
/*
* This is a sanity check, whenever we COW a block we will update
* new_bytenr with it's current location, and we will check this in
* various places to validate that the cache makes sense, it shouldn't
* be used for anything else.
*/
u64 new_bytenr;
/* Objectid of tree block owner, can be not uptodate */
u64 owner;