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fscrypt: new helper function - fscrypt_get_symlink()

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Filesystems also have duplicate code to support ->get_link() on
encrypted symlinks.  Factor it out into a new function
fscrypt_get_symlink().  It takes in the contents of the encrypted
symlink on-disk and provides the target (decrypted or encoded) that
should be returned from ->get_link().

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Eric Biggers
2018-01-05 10:45:02 -08:00
committed by Theodore Ts'o
parent 76e81d6d50
commit 3b0d8837a7
3 changed files with 84 additions and 0 deletions
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include/linux/fscrypt_supp.h
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@@ -211,5 +211,8 @@ extern int __fscrypt_prepare_symlink(struct inode *dir, unsigned int len,
extern int __fscrypt_encrypt_symlink(struct inode *inode, const char *target,
unsigned int len,
struct fscrypt_str *disk_link);
extern const char *fscrypt_get_symlink(struct inode *inode, const void *caddr,
unsigned int max_size,
struct delayed_call *done);
#endif /* _LINUX_FSCRYPT_SUPP_H */