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fscrypt: introduce helper function for filename matching

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Introduce a helper function fscrypt_match_name() which tests whether a
fscrypt_name matches a directory entry.  Also clean up the magic numbers
and document things properly.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Eric Biggers
2017-04-24 10:00:10 -07:00
committed by Theodore Ts'o
parent 6b06cdee81
commit 17159420a6
4 changed files with 157 additions and 22 deletions
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9
include/linux/fscrypt_notsupp.h
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@@ -147,6 +147,15 @@ static inline int fscrypt_fname_usr_to_disk(struct inode *inode,
return -EOPNOTSUPP;
}
static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
const u8 *de_name, u32 de_name_len)
{
/* Encryption support disabled; use standard comparison */
if (de_name_len != fname->disk_name.len)
return false;
return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
}
/* bio.c */
static inline void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *ctx,
struct bio *bio)