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author | Kent Overstreet <kent.overstreet@gmail.com> | 2021-10-21 19:05:21 +0300 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:09:14 +0300 |
commit | e5fa91d7ac88ac6a8385c14dbc8dcbe1a053e62f (patch) | |
tree | 83b3a0013dfe40d4375ce04293a1a859ac877ae4 /fs/bcachefs/reflink.c | |
parent | d17bc1739c5adaf9421cbc51b40e50da677c6b54 (diff) | |
download | linux-e5fa91d7ac88ac6a8385c14dbc8dcbe1a053e62f.tar.xz |
bcachefs: Fix restart handling in for_each_btree_key()
Code that uses for_each_btree_key often wants transaction restarts to be
handled locally and not returned. Originally, we wouldn't return
transaction restarts if there was a single iterator in the transaction -
the reasoning being if there weren't other iterators being invalidated,
and the current iterator was being advanced/retraversed, there weren't
any locks or iterators we were required to preserve.
But with the btree_path conversion that approach doesn't work anymore -
even when we're using for_each_btree_key() with a single iterator there
will still be two paths in the transaction, since we now always preserve
the path at the pos the iterator was initialized at - the reason being
that on restart we often restart from the same place.
And it turns out there's now a lot of for_each_btree_key() uses that _do
not_ want transaction restarts handled locally, and should be returning
them.
This patch splits out for_each_btree_key_norestart() and
for_each_btree_key_continue_norestart(), and converts existing users as
appropriate. for_each_btree_key(), for_each_btree_key_continue(), and
for_each_btree_node() now handle transaction restarts themselves by
calling bch2_trans_begin() when necessary - and the old hack to not
return transaction restarts when there's a single path in the
transaction has been deleted.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Diffstat (limited to 'fs/bcachefs/reflink.c')
-rw-r--r-- | fs/bcachefs/reflink.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/bcachefs/reflink.c b/fs/bcachefs/reflink.c index 2827d0ef1019..8e66e6390e62 100644 --- a/fs/bcachefs/reflink.c +++ b/fs/bcachefs/reflink.c @@ -131,7 +131,7 @@ static int bch2_make_extent_indirect(struct btree_trans *trans, if (orig->k.type == KEY_TYPE_inline_data) bch2_check_set_feature(c, BCH_FEATURE_reflink_inline_data); - for_each_btree_key(trans, reflink_iter, BTREE_ID_reflink, + for_each_btree_key_norestart(trans, reflink_iter, BTREE_ID_reflink, POS(0, c->reflink_hint), BTREE_ITER_INTENT|BTREE_ITER_SLOTS, k, ret) { if (reflink_iter.pos.inode) { @@ -194,7 +194,7 @@ static struct bkey_s_c get_next_src(struct btree_iter *iter, struct bpos end) struct bkey_s_c k; int ret; - for_each_btree_key_continue(*iter, 0, k, ret) { + for_each_btree_key_continue_norestart(*iter, 0, k, ret) { if (bkey_cmp(iter->pos, end) >= 0) break; |