From: Johannes Thumshirn <johannes.thumsh...@wdc.com>

Don't set the zoned flag in fs_info as soon as we're encountering the
incompat filesystem flag for a zoned filesystem on mount. The zoned flag
in fs_info is in a union together with the zone_size, so setting it too
early will result in setting an incorrect zone_size as well.

Once the correct zone_size is read from the device, we can rely on the
zoned flag in fs_info as well to determine if the filesystem is zoned.

Reviewed-by: Anand Jain <anand.j...@oracle.com>
Reviewed-by: Josef Bacik <jo...@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumsh...@wdc.com>
Reviewed-by: David Sterba <dste...@suse.com>
---
 fs/btrfs/disk-io.c | 2 --
 fs/btrfs/zoned.c   | 8 ++++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 2b6a3df765cd..8551b0fc1b22 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3201,8 +3201,6 @@ int __cold open_ctree(struct super_block *sb, struct 
btrfs_fs_devices *fs_device
        if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
                btrfs_info(fs_info, "has skinny extents");
 
-       fs_info->zoned = (features & BTRFS_FEATURE_INCOMPAT_ZONED);
-
        /*
         * flag our filesystem as having big metadata blocks if
         * they are bigger than the page size
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 8b3868088c5e..c0840412ccb6 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -432,6 +432,14 @@ int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info)
        fs_info->zone_size = zone_size;
        fs_info->max_zone_append_size = max_zone_append_size;
 
+       /*
+        * Check mount options here, because we might change fs_info->zoned
+        * from fs_info->zone_size.
+        */
+       ret = btrfs_check_mountopts_zoned(fs_info);
+       if (ret)
+               goto out;
+
        btrfs_info(fs_info, "zoned mode enabled with zone size %llu", 
zone_size);
 out:
        return ret;
-- 
2.30.0

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