From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Wed, 18 Mar 2020 15:46:46 +0000 (-0400)
Subject: bcachefs: Shut down quicker
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6d61724b2ba1836e4e1f5f8755cb2278d4eae1a0;p=linux.git

bcachefs: Shut down quicker

Internal writes (i.e. copygc/rebalance operations) shouldn't be blocking
on the allocator when we're going RO.

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

diff --git a/fs/bcachefs/io.c b/fs/bcachefs/io.c
index 2ec7203e58248..3dcb166afa231 100644
--- a/fs/bcachefs/io.c
+++ b/fs/bcachefs/io.c
@@ -1070,6 +1070,12 @@ again:
 					BKEY_EXTENT_U64s_MAX))
 			goto flush_io;
 
+		if ((op->flags & BCH_WRITE_FROM_INTERNAL) &&
+		    percpu_ref_is_dying(&c->writes)) {
+			ret = -EROFS;
+			goto err;
+		}
+
 		wp = bch2_alloc_sectors_start(c,
 			op->target,
 			op->opts.erasure_code,