f2fs: remove f2fs_dir_open()
Since encrypted directories can be opened and searched without their key being available, and each readdir and ->lookup() tries to set up the key, trying to set up the key in ->open() too isn't really useful. Just remove it so that directories don't need an ->open() method anymore, and so that we eliminate a use of fscrypt_get_encryption_info() (which I'd like to stop exporting to filesystems). Reviewed-by: NChao Yu <yuchao0@huawei.com> Link: https://lore.kernel.org/r/20201203022041.230976-3-ebiggers@kernel.orgSigned-off-by: NEric Biggers <ebiggers@google.com>
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