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| author | Eric Biggers <ebiggers@google.com> | 2020-09-23 22:47:21 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2020-09-28 14:44:51 -0700 |
| commit | 5b2a828b98ec1872799b1b4d82113c76a12d594f (patch) | |
| tree | 4241d7eb47dede9cb86afcca4de7d6bb3b5297ca /include/linux | |
| parent | 501e43fbea468fa93c1dff0ee744e69303ef5a43 (diff) | |
| download | lwn-5b2a828b98ec1872799b1b4d82113c76a12d594f.tar.gz lwn-5b2a828b98ec1872799b1b4d82113c76a12d594f.zip | |
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 'include/linux')
| -rw-r--r-- | include/linux/fscrypt.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h index f1757e73162d..a8f7a43f031b 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -197,6 +197,7 @@ int fscrypt_fname_disk_to_usr(const struct inode *inode, bool fscrypt_match_name(const struct fscrypt_name *fname, const u8 *de_name, u32 de_name_len); u64 fscrypt_fname_siphash(const struct inode *dir, const struct qstr *name); +int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags); /* bio.c */ void fscrypt_decrypt_bio(struct bio *bio); @@ -454,6 +455,12 @@ static inline u64 fscrypt_fname_siphash(const struct inode *dir, return 0; } +static inline int fscrypt_d_revalidate(struct dentry *dentry, + unsigned int flags) +{ + return 1; +} + /* bio.c */ static inline void fscrypt_decrypt_bio(struct bio *bio) { |