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| author | Eric Biggers <ebiggers@google.com> | 2020-09-24 08:47:21 +0300 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2020-09-29 00:44:51 +0300 |
| commit | 5b2a828b98ec1872799b1b4d82113c76a12d594f (patch) | |
| tree | 4241d7eb47dede9cb86afcca4de7d6bb3b5297ca /fs/crypto/fname.c | |
| parent | 501e43fbea468fa93c1dff0ee744e69303ef5a43 (diff) | |
| download | linux-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/fname.c')
| -rw-r--r-- | fs/crypto/fname.c | 3 |
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, |