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| author | Eric Biggers <ebiggers@google.com> | 2017-10-09 12:15:43 -0700 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-10-18 19:52:38 -0400 |
| commit | 32c3cf028e747d1e9cf0679b16dcbe3794fe4853 (patch) | |
| tree | 812ab8801463d63ae0f41ced67168817988b6b9f /fs/crypto | |
| parent | 94b26f3672a0e41025104c7e46943917544e1c87 (diff) | |
| download | linux-32c3cf028e747d1e9cf0679b16dcbe3794fe4853.tar.gz linux-32c3cf028e747d1e9cf0679b16dcbe3794fe4853.tar.bz2 linux-32c3cf028e747d1e9cf0679b16dcbe3794fe4853.zip | |
fscrypt: new helper function - fscrypt_prepare_lookup()
Introduce a helper function which prepares to look up the given dentry
in the given directory. If the directory is encrypted, it handles
loading the directory's encryption key, setting the dentry's ->d_op to
fscrypt_d_ops, and setting DCACHE_ENCRYPTED_WITH_KEY if the directory's
encryption key is available.
Note: once all filesystems switch over to this, we'll be able to move
fscrypt_d_ops and fscrypt_set_encrypted_dentry() to fscrypt_private.h.
Acked-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/crypto')
| -rw-r--r-- | fs/crypto/hooks.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/crypto/hooks.c b/fs/crypto/hooks.c index 822cb78f9b45..9f5fb2eb9cf7 100644 --- a/fs/crypto/hooks.c +++ b/fs/crypto/hooks.c @@ -92,3 +92,21 @@ int __fscrypt_prepare_rename(struct inode *old_dir, struct dentry *old_dentry, return 0; } EXPORT_SYMBOL_GPL(__fscrypt_prepare_rename); + +int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry) +{ + int err = fscrypt_get_encryption_info(dir); + + if (err) + return err; + + if (fscrypt_has_encryption_key(dir)) { + spin_lock(&dentry->d_lock); + dentry->d_flags |= DCACHE_ENCRYPTED_WITH_KEY; + spin_unlock(&dentry->d_lock); + } + + d_set_d_op(dentry, &fscrypt_d_ops); + return 0; +} +EXPORT_SYMBOL_GPL(__fscrypt_prepare_lookup); |