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| author | Eric Biggers <ebiggers@google.com> | 2018-01-12 05:30:08 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-01-12 05:30:08 +0100 |
| commit | 50c961de59ec841c1185c18457e6dab227f3bbf3 (patch) | |
| tree | 3db5eb9b6ffe59dd34ff325810869891b2fed53e /include | |
| parent | fscrypt: move fscrypt_symlink_data to fscrypt_private.h (diff) | |
| download | linux-50c961de59ec841c1185c18457e6dab227f3bbf3.tar.xz linux-50c961de59ec841c1185c18457e6dab227f3bbf3.zip | |
fscrypt: calculate NUL-padding length in one place only
Currently, when encrypting a filename (either a real filename or a
symlink target) we calculate the amount of NUL-padding twice: once
before encryption and once during encryption in fname_encrypt(). It is
needed before encryption to allocate the needed buffer size as well as
calculate the size the symlink target will take up on-disk before
creating the symlink inode. Calculating the size during encryption as
well is redundant.
Remove this redundancy by always calculating the exact size beforehand,
and making fname_encrypt() just add as much NUL padding as is needed to
fill the output buffer.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions