[PATCH] crypto: allow to assign gfp_t for __crypto_alloc_tfm
From: jaegeuk@kernel.org (Jaegeuk Kim)
Date: 2015-05-19 07:13:27
Also in:
linux-crypto, linux-ext4, linux-f2fs-devel, lkml
On Tue, May 19, 2015 at 02:59:29PM +0800, Herbert Xu wrote:
On Mon, May 18, 2015 at 11:58:12PM -0700, Jaegeuk Kim wrote:quoted
quoted
So where does the key get generated? The crypto tfm should be allocated when you generate the key.In fs/ext4/crypto.c, - writepage - ext4_encrypt - ext4_get_crypto_ctx - crypto_alloc_ablkcipher - ext4_page_crypto - crypto_ablkcipher_setkey - ablkcipher_request_alloc(GFP_NOFS) - ablkcipher_request_set_crypt(PAGE_CACHE_SIZE) - crypto_ablkcipher_encrypt - end_io - crypto_free_tfmNo that's where you set the key, not where you generate the key.
The key generation is done by ext4_generate_encryption_key in fs/ext4/crypto_key.c. And, ext4_file_mmap and ext4_file_open trigger it.
-- Email: Herbert Xu [off-list ref] Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt