[v5,22/28] btrfs: disallow inode_cache in HMZONED mode
diff mbox series

Message ID 20191204081735.852438-23-naohiro.aota@wdc.com
State New
Headers show
  • btrfs: zoned block device support
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Commit Message

Naohiro Aota Dec. 4, 2019, 8:17 a.m. UTC
inode_cache use pre-allocation to write its cache data. However,
pre-allocation is completely disabled in HMZONED mode.

We can technically enable inode_cache in the same way as relocation.
However, inode_cache is rarely used and the man page discourage using it.
So, let's just disable it for now.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
 fs/btrfs/hmzoned.c | 6 ++++++
 1 file changed, 6 insertions(+)

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diff --git a/fs/btrfs/hmzoned.c b/fs/btrfs/hmzoned.c
index 1fdc5946715a..55530782c1b1 100644
--- a/fs/btrfs/hmzoned.c
+++ b/fs/btrfs/hmzoned.c
@@ -345,6 +345,12 @@  int btrfs_check_mountopts_hmzoned(struct btrfs_fs_info *info)
 		return -EINVAL;
+	if (btrfs_test_pending(info, SET_INODE_MAP_CACHE)) {
+		btrfs_err(info,
+		  "cannot enable inode map caching with HMZONED mode");
+		return -EINVAL;
+	}
 	return 0;