diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2021-10-21 12:05:21 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:14 -0400 |
| commit | e5fa91d7ac88ac6a8385c14dbc8dcbe1a053e62f (patch) | |
| tree | 83b3a0013dfe40d4375ce04293a1a859ac877ae4 /fs/bcachefs/dirent.c | |
| parent | d17bc1739c5adaf9421cbc51b40e50da677c6b54 (diff) | |
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/dirent.c')
| -rw-r--r-- | fs/bcachefs/dirent.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/bcachefs/dirent.c b/fs/bcachefs/dirent.c index 26df20ad090c..00dac68701f5 100644 --- a/fs/bcachefs/dirent.c +++ b/fs/bcachefs/dirent.c @@ -432,7 +432,7 @@ int bch2_empty_dir_trans(struct btree_trans *trans, subvol_inum dir) if (ret) return ret; - for_each_btree_key(trans, iter, BTREE_ID_dirents, + for_each_btree_key_norestart(trans, iter, BTREE_ID_dirents, SPOS(dir.inum, 0, snapshot), 0, k, ret) { if (k.k->p.inode > dir.inum) break; @@ -464,7 +464,7 @@ retry: if (ret) goto err; - for_each_btree_key(&trans, iter, BTREE_ID_dirents, + for_each_btree_key_norestart(&trans, iter, BTREE_ID_dirents, SPOS(inum.inum, ctx->pos, snapshot), 0, k, ret) { if (k.k->p.inode > inum.inum) break; |