diff mbox series

[v2,5/8] btrfs: check for relocation inodes on zoned btrfs in should_nocow

Message ID 9facc2896434f78cd72f5147948db55786bf1150.1631117101.git.johannes.thumshirn@wdc.com (mailing list archive)
State New, archived
Headers show
Series btrfs: zoned: unify relocation on a zoned and regular FS | expand

Commit Message

Johannes Thumshirn Sept. 8, 2021, 4:19 p.m. UTC 
Prepare for allowing preallocation for relocation inodes.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 fs/btrfs/inode.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e89e16a9c56c..4eb64753382c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1944,7 +1944,15 @@  int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page
 	const bool zoned = btrfs_is_zoned(inode->root->fs_info);
 
 	if (should_nocow(inode, start, end)) {
-		ASSERT(!zoned);
+		/*
+		 * Normally on a zoned device we're only doing CoW writes, but
+		 * in case of relocation on a zoned FS we have taken precaution,
+		 * that we're only writing sequentially. It's safe to use
+		 * run_delalloc_nocow() here, like for  regular preallocated
+		 * inodes.
+		 */
+		ASSERT(!zoned ||
+		       (zoned && btrfs_is_data_reloc_root(inode->root)));
 		ret = run_delalloc_nocow(inode, locked_page, start, end,
 					 page_started, nr_written);
 	} else if (!inode_can_compress(inode) ||