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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-08-21 21:29:43 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:09:40 +0300 |
| commit | ca7d8fcabf29fae627babb72bda9b51763f9a145 (patch) | |
| tree | ed2ff585e6590f8d16c911837b8e1e1b27e19e6b /fs/bcachefs/btree_io.c | |
| parent | 546180874ade7225676bc0cd5ea4e2388e2374bc (diff) | |
| download | linux-ca7d8fcabf29fae627babb72bda9b51763f9a145.tar.xz | |
bcachefs: New locking functions
In the future, with the new deadlock cycle detector, we won't be using
bare six_lock_* anymore: lock wait entries will all be embedded in
btree_trans, and we will need a btree_trans context whenever locking a
btree node.
This patch plumbs a btree_trans to the few places that need it, and adds
two new locking functions
- btree_node_lock_nopath, which may fail returning a transaction
restart, and
- btree_node_lock_nopath_nofail, to be used in places where we know we
cannot deadlock (i.e. because we're holding no other locks).
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Diffstat (limited to 'fs/bcachefs/btree_io.c')
| -rw-r--r-- | fs/bcachefs/btree_io.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/bcachefs/btree_io.c b/fs/bcachefs/btree_io.c index b3dc8b43298e..c63cb70836cc 100644 --- a/fs/bcachefs/btree_io.c +++ b/fs/bcachefs/btree_io.c @@ -1652,9 +1652,15 @@ static void __btree_node_write_done(struct bch_fs *c, struct btree *b) static void btree_node_write_done(struct bch_fs *c, struct btree *b) { - six_lock_read(&b->c.lock, NULL, NULL); + struct btree_trans trans; + + bch2_trans_init(&trans, c, 0, 0); + + btree_node_lock_nopath_nofail(&trans, &b->c, SIX_LOCK_read); __btree_node_write_done(c, b); six_unlock_read(&b->c.lock); + + bch2_trans_exit(&trans); } static void btree_node_write_work(struct work_struct *work) |