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-rw-r--r--fs/btrfs/inode.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 7d27d6626888..9b05af75d910 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 filesystem 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) ||