dm-default-key, f2fs, ICE: support dm-default-key with f2fs/ICE
This patch fixes assigning bi_crypt_key for moving data which was previously
encrypted by f2fs.
Note that, dm-default-key should not assign bi_crypt_key, if bi_crypt_skip is
set.
The issue sceanrios is:
1. write data with user key by f2fs
- ENC(KU, IVU, DATA)
2. log out user key
3. read data #1 w/o user key from LBA #a
4. dm-default-key assigns default key
- DEC(KD, LBA#a, ENC(KU, IVU, DATA))
5. write data #1 w/o user key into LBA #b
6. dm-default-key assigns default key
- ENC(KD, LBA#b, DEC(KD, LBA#a, ENC(KU, IVU, DATA)))
7. Read DATA out with valid logged-in user key
- DEC(KU, IVU, ENC(KD, LBA#b, DEC(KD, LBA#a, ENC(KU, IVU, DATA))))
So, this patch introduces bi_crypt_skip to avoid 4. ~ 6 with right flow:
1. write data with user key by f2fs
- ENC(KU, IVU, DATA)
2. log out user key
3. read data #1 w/o user key from LBA #a
4. dm-default-key skip to assign default key
- ENC(KU, IVU, DATA)
5. write data #1 w/o user key into LBA #b
6. dm-default-key skips to assign default key
- ENC(KU, IVU, DATA)
7. Try to read DATA with valid logged-in user key
- DEC(KU, IVU, ENC(KU, IVU, DATA))
Issue: 68721442
Change-Id: Icefe85f608b7c3c84beb2bfa4267efd0f3787453
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Signed-off-by: Shivaprasad Hongal <shongal@codeaurora.org>
[neersoni@codeaurora.corg: resolved merged conflicts, compilation issues.]
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>
6 files changed