diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2021-03-24 18:02:16 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:08:57 -0400 |
| commit | e751c01a8ee1ca934cc0953e2e77ad4ea3e64d5e (patch) | |
| tree | 9930602caa160b05f2e62925c86192ae1ab9bc31 /fs/bcachefs/extents.c | |
| parent | 4cf91b0270dc16a6637db4c200c7fb745b941065 (diff) | |
bcachefs: Start using bpos.snapshot field
This patch starts treating the bpos.snapshot field like part of the key
in the btree code:
* bpos_successor() and bpos_predecessor() now include the snapshot field
* Keys in btrees that will be using snapshots (extents, inodes, dirents
and xattrs) now always have their snapshot field set to U32_MAX
The btree iterator code gets a new flag, BTREE_ITER_ALL_SNAPSHOTS, that
determines whether we're iterating over keys in all snapshots or not -
internally, this controlls whether bkey_(successor|predecessor)
increment/decrement the snapshot field, or only the higher bits of the
key.
We add a new member to struct btree_iter, iter->snapshot: when
BTREE_ITER_ALL_SNAPSHOTS is not set, iter->pos.snapshot should always
equal iter->snapshot, which will be 0 for btrees that don't use
snapshots, and alsways U32_MAX for btrees that will use snapshots
(until we enable snapshot creation).
This patch also introduces a new metadata version number, and compat
code for reading from/writing to older versions - this isn't a forced
upgrade (yet).
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/extents.c')
| -rw-r--r-- | fs/bcachefs/extents.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/bcachefs/extents.c b/fs/bcachefs/extents.c index 7ac3d7587655..1f28dea26ca2 100644 --- a/fs/bcachefs/extents.c +++ b/fs/bcachefs/extents.c @@ -179,7 +179,8 @@ const char *bch2_btree_ptr_v2_invalid(const struct bch_fs *c, struct bkey_s_c k) if (bkey_val_u64s(k.k) > BKEY_BTREE_PTR_VAL_U64s_MAX) return "value too big"; - if (bp.v->min_key.snapshot) + if (c->sb.version < bcachefs_metadata_version_snapshot && + bp.v->min_key.snapshot) return "invalid min_key.snapshot"; return bch2_bkey_ptrs_invalid(c, k); @@ -211,8 +212,8 @@ void bch2_btree_ptr_v2_compat(enum btree_id btree_id, unsigned version, btree_node_type_is_extents(btree_id) && bkey_cmp(bp.v->min_key, POS_MIN)) bp.v->min_key = write - ? bkey_predecessor(bp.v->min_key) - : bkey_successor(bp.v->min_key); + ? bpos_nosnap_predecessor(bp.v->min_key) + : bpos_nosnap_successor(bp.v->min_key); } /* KEY_TYPE_extent: */ |