bcachefs: New erasure coding shutdown path

This implements a new shutdown path for erasure coding, which is needed
for the upcoming BCH_WRITE_WAIT_FOR_EC write path.

The process is:
 - Cancel new stripes being built up
 - Close out/cancel open buckets on write points or the partial list
   that are for stripes
 - Shutdown rebalance/copygc
 - Then wait for in flight new stripes to finish

With BCH_WRITE_WAIT_FOR_EC, move ops will be waiting on stripes to fill
up before they complete; the new ec shutdown path is needed for shutting
down copygc/rebalance without deadlocking.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 6 deletions

diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c
index f74ef947cac5..4a9ffca7be62 100644
--- a/fs/bcachefs/move.c
+++ b/fs/bcachefs/move.c
@@ -59,7 +59,6 @@ struct moving_io {
 static void move_free(struct moving_io *io)
 {
 	struct moving_context *ctxt = io->write.ctxt;
-	struct bch_fs *c = ctxt->c;
 
 	if (io->b)
 		atomic_dec(&io->b->count);
@@ -71,7 +70,6 @@ static void move_free(struct moving_io *io)
 	wake_up(&ctxt->wait);
 	mutex_unlock(&ctxt->lock);
 
-	bch2_write_ref_put(c, BCH_WRITE_REF_move);
 	kfree(io);
 }
 
@@ -280,9 +278,6 @@ static int bch2_move_extent(struct btree_trans *trans,
 		return 0;
 	}
 
-	if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_move))
-		return -BCH_ERR_erofs_no_writes;
-
 	/*
 	 * Before memory allocations & taking nocow locks in
 	 * bch2_data_update_init():
@@ -378,7 +373,6 @@ err_free_pages:
 err_free:
 	kfree(io);
 err:
-	bch2_write_ref_put(c, BCH_WRITE_REF_move);
 	trace_and_count(c, move_extent_alloc_mem_fail, k.k);
 	return ret;
 }