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| author | Boris Burkov <boris@bur.io> | 2023-03-29 01:04:02 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-10-12 16:44:11 +0200 |
| commit | 457cb1ddf5e8d895e9c551cad6b84bafae41f32c (patch) | |
| tree | 99dec5946fbd722fb68e1862135a544a0b0f223b /fs/btrfs/delayed-ref.h | |
| parent | btrfs: rename tree_ref and data_ref owning_root (diff) | |
| download | linux-457cb1ddf5e8d895e9c551cad6b84bafae41f32c.tar.xz linux-457cb1ddf5e8d895e9c551cad6b84bafae41f32c.zip | |
btrfs: track owning root in btrfs_ref
While data extents require us to store additional inline refs to track
the original owner on free, this information is available implicitly for
metadata. It is found in the owner field of the header of the tree
block. Even if other trees refer to this block and the original ref goes
away, we will not rewrite that header field, so it will reliably give the
original owner.
In addition, there is a relocation case where a new data extent needs to
have an owning root separate from the referring root wired through
delayed refs.
To use it for recording simple quota deltas, we need to wire this root
id through from when we create the delayed ref until we fully process
it. Store it in the generic btrfs_ref struct of the delayed ref.
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/delayed-ref.h')
| -rw-r--r-- | fs/btrfs/delayed-ref.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index a7fdb28df1cd..84b37888bff3 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -245,6 +245,7 @@ struct btrfs_ref { #endif u64 bytenr; u64 len; + u64 owning_root; /* Bytenr of the parent tree block */ u64 parent; @@ -295,16 +296,18 @@ static inline u64 btrfs_calc_delayed_ref_csum_bytes(const struct btrfs_fs_info * } static inline void btrfs_init_generic_ref(struct btrfs_ref *generic_ref, - int action, u64 bytenr, u64 len, u64 parent) + int action, u64 bytenr, u64 len, + u64 parent, u64 owning_root) { generic_ref->action = action; generic_ref->bytenr = bytenr; generic_ref->len = len; generic_ref->parent = parent; + generic_ref->owning_root = owning_root; } -static inline void btrfs_init_tree_ref(struct btrfs_ref *generic_ref, - int level, u64 root, u64 mod_root, bool skip_qgroup) +static inline void btrfs_init_tree_ref(struct btrfs_ref *generic_ref, int level, + u64 root, u64 mod_root, bool skip_qgroup) { #ifdef CONFIG_BTRFS_FS_REF_VERIFY /* If @real_root not set, use @root as fallback */ |