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authorEric Biggers <ebiggers@google.com>2020-09-24 08:47:21 +0300
committerEric Biggers <ebiggers@google.com>2020-09-29 00:44:51 +0300
commit5b2a828b98ec1872799b1b4d82113c76a12d594f (patch)
tree4241d7eb47dede9cb86afcca4de7d6bb3b5297ca /fs/crypto
parent501e43fbea468fa93c1dff0ee744e69303ef5a43 (diff)
downloadlinux-5b2a828b98ec1872799b1b4d82113c76a12d594f.tar.xz
fscrypt: export fscrypt_d_revalidate()
Dentries that represent no-key names must have a dentry_operations that includes fscrypt_d_revalidate(). Currently, this is handled by fscrypt_prepare_lookup() installing fscrypt_d_ops. However, ceph support for encryption (https://lore.kernel.org/r/20200914191707.380444-1-jlayton@kernel.org) can't use fscrypt_d_ops, since ceph already has its own dentry_operations. Similarly, ext4 and f2fs support for directories that are both encrypted and casefolded (https://lore.kernel.org/r/20200923010151.69506-1-drosen@google.com) can't use fscrypt_d_ops either, since casefolding requires some dentry operations too. To satisfy both users, we need to move the responsibility of installing the dentry_operations to filesystems. In preparation for this, export fscrypt_d_revalidate() and give it a !CONFIG_FS_ENCRYPTION stub. Reviewed-by: Jeff Layton <jlayton@kernel.org> Link: https://lore.kernel.org/r/20200924054721.187797-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/crypto')
-rw-r--r--fs/crypto/fname.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index c65979452844..1fbe6c24d705 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -530,7 +530,7 @@ EXPORT_SYMBOL_GPL(fscrypt_fname_siphash);
* Validate dentries in encrypted directories to make sure we aren't potentially
* caching stale dentries after a key has been added.
*/
-static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
+int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *dir;
int err;
@@ -569,6 +569,7 @@ static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
return valid;
}
+EXPORT_SYMBOL_GPL(fscrypt_d_revalidate);
const struct dentry_operations fscrypt_d_ops = {
.d_revalidate = fscrypt_d_revalidate,