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Date: Mon, 21 Aug 2017 17:04:57 +0300 From: Gilad Ben-Yossef <gilad@...yossef.com> To: Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller" <davem@...emloft.net>, Jonathan Corbet <corbet@....net>, David Howells <dhowells@...hat.com>, Tom Lendacky <thomas.lendacky@....com>, Gary Hook <gary.hook@....com>, Boris Brezillon <boris.brezillon@...e-electrons.com>, Arnaud Ebalard <arno@...isbad.org>, Matthias Brugger <matthias.bgg@...il.com>, Alasdair Kergon <agk@...hat.com>, Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com, Shaohua Li <shli@...nel.org>, Steve French <sfrench@...ba.org>, "Theodore Y. Ts'o" <tytso@....edu>, Jaegeuk Kim <jaegeuk@...nel.org>, Mimi Zohar <zohar@...ux.vnet.ibm.com>, Dmitry Kasatkin <dmitry.kasatkin@...il.com>, James Morris <james.l.morris@...cle.com>, "Serge E. Hallyn" <serge@...lyn.com>, linux-crypto@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, keyrings@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, linux-raid@...r.kernel.org, linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org, linux-fscrypt@...r.kernel.org, linux-ima-devel@...ts.sourceforge.net, linux-ima-user@...ts.sourceforge.net, linux-security-module@...r.kernel.org Cc: Ofir Drang <ofir.drang@....com> Subject: [PATCH v6 11/19] fscrypt: move to generic async completion fscrypt starts several async. crypto ops and waiting for them to complete. Move it over to generic code doing the same. Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com> --- fs/crypto/crypto.c | 28 ++++------------------------ fs/crypto/fname.c | 36 ++++++------------------------------ fs/crypto/fscrypt_private.h | 10 ---------- fs/crypto/keyinfo.c | 21 +++------------------ 4 files changed, 13 insertions(+), 82 deletions(-) diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index c7835df..80a3cad 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -126,21 +126,6 @@ struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode, gfp_t gfp_flags) } EXPORT_SYMBOL(fscrypt_get_ctx); -/** - * page_crypt_complete() - completion callback for page crypto - * @req: The asynchronous cipher request context - * @res: The result of the cipher operation - */ -static void page_crypt_complete(struct crypto_async_request *req, int res) -{ - struct fscrypt_completion_result *ecr = req->data; - - if (res == -EINPROGRESS) - return; - ecr->res = res; - complete(&ecr->completion); -} - int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw, u64 lblk_num, struct page *src_page, struct page *dest_page, unsigned int len, @@ -151,7 +136,7 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw, u8 padding[FS_IV_SIZE - sizeof(__le64)]; } iv; struct skcipher_request *req = NULL; - DECLARE_FS_COMPLETION_RESULT(ecr); + DECLARE_CRYPTO_WAIT(wait); struct scatterlist dst, src; struct fscrypt_info *ci = inode->i_crypt_info; struct crypto_skcipher *tfm = ci->ci_ctfm; @@ -179,7 +164,7 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw, skcipher_request_set_callback( req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - page_crypt_complete, &ecr); + crypto_req_done, &wait); sg_init_table(&dst, 1); sg_set_page(&dst, dest_page, len, offs); @@ -187,14 +172,9 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw, sg_set_page(&src, src_page, len, offs); skcipher_request_set_crypt(req, &src, &dst, len, &iv); if (rw == FS_DECRYPT) - res = crypto_skcipher_decrypt(req); + res = crypto_wait_req(crypto_skcipher_decrypt(req), &wait); else - res = crypto_skcipher_encrypt(req); - if (res == -EINPROGRESS || res == -EBUSY) { - BUG_ON(req->base.data != &ecr); - wait_for_completion(&ecr.completion); - res = ecr.res; - } + res = crypto_wait_req(crypto_skcipher_encrypt(req), &wait); skcipher_request_free(req); if (res) { printk_ratelimited(KERN_ERR diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c index ad9f814..a80a0d3 100644 --- a/fs/crypto/fname.c +++ b/fs/crypto/fname.c @@ -15,21 +15,6 @@ #include "fscrypt_private.h" /** - * fname_crypt_complete() - completion callback for filename crypto - * @req: The asynchronous cipher request context - * @res: The result of the cipher operation - */ -static void fname_crypt_complete(struct crypto_async_request *req, int res) -{ - struct fscrypt_completion_result *ecr = req->data; - - if (res == -EINPROGRESS) - return; - ecr->res = res; - complete(&ecr->completion); -} - -/** * fname_encrypt() - encrypt a filename * * The caller must have allocated sufficient memory for the @oname string. @@ -40,7 +25,7 @@ static int fname_encrypt(struct inode *inode, const struct qstr *iname, struct fscrypt_str *oname) { struct skcipher_request *req = NULL; - DECLARE_FS_COMPLETION_RESULT(ecr); + DECLARE_CRYPTO_WAIT(wait); struct fscrypt_info *ci = inode->i_crypt_info; struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; @@ -76,17 +61,12 @@ static int fname_encrypt(struct inode *inode, } skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - fname_crypt_complete, &ecr); + crypto_req_done, &wait); sg_init_one(&sg, oname->name, cryptlen); skcipher_request_set_crypt(req, &sg, &sg, cryptlen, iv); /* Do the encryption */ - res = crypto_skcipher_encrypt(req); - if (res == -EINPROGRESS || res == -EBUSY) { - /* Request is being completed asynchronously; wait for it */ - wait_for_completion(&ecr.completion); - res = ecr.res; - } + res = crypto_wait_req(crypto_skcipher_encrypt(req), &wait); skcipher_request_free(req); if (res < 0) { printk_ratelimited(KERN_ERR @@ -110,7 +90,7 @@ static int fname_decrypt(struct inode *inode, struct fscrypt_str *oname) { struct skcipher_request *req = NULL; - DECLARE_FS_COMPLETION_RESULT(ecr); + DECLARE_CRYPTO_WAIT(wait); struct scatterlist src_sg, dst_sg; struct fscrypt_info *ci = inode->i_crypt_info; struct crypto_skcipher *tfm = ci->ci_ctfm; @@ -131,7 +111,7 @@ static int fname_decrypt(struct inode *inode, } skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - fname_crypt_complete, &ecr); + crypto_req_done, &wait); /* Initialize IV */ memset(iv, 0, FS_CRYPTO_BLOCK_SIZE); @@ -140,11 +120,7 @@ static int fname_decrypt(struct inode *inode, sg_init_one(&src_sg, iname->name, iname->len); sg_init_one(&dst_sg, oname->name, oname->len); skcipher_request_set_crypt(req, &src_sg, &dst_sg, iname->len, iv); - res = crypto_skcipher_decrypt(req); - if (res == -EINPROGRESS || res == -EBUSY) { - wait_for_completion(&ecr.completion); - res = ecr.res; - } + res = crypto_wait_req(crypto_skcipher_decrypt(req), &wait); skcipher_request_free(req); if (res < 0) { printk_ratelimited(KERN_ERR diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h index a1d5021..c0f1881 100644 --- a/fs/crypto/fscrypt_private.h +++ b/fs/crypto/fscrypt_private.h @@ -69,16 +69,6 @@ typedef enum { #define FS_CTX_REQUIRES_FREE_ENCRYPT_FL 0x00000001 #define FS_CTX_HAS_BOUNCE_BUFFER_FL 0x00000002 -struct fscrypt_completion_result { - struct completion completion; - int res; -}; - -#define DECLARE_FS_COMPLETION_RESULT(ecr) \ - struct fscrypt_completion_result ecr = { \ - COMPLETION_INITIALIZER_ONSTACK((ecr).completion), 0 } - - /* crypto.c */ extern int fscrypt_initialize(unsigned int cop_flags); extern struct workqueue_struct *fscrypt_read_workqueue; diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c index 018c588..3c84cac 100644 --- a/fs/crypto/keyinfo.c +++ b/fs/crypto/keyinfo.c @@ -17,17 +17,6 @@ static struct crypto_shash *essiv_hash_tfm; -static void derive_crypt_complete(struct crypto_async_request *req, int rc) -{ - struct fscrypt_completion_result *ecr = req->data; - - if (rc == -EINPROGRESS) - return; - - ecr->res = rc; - complete(&ecr->completion); -} - /** * derive_key_aes() - Derive a key using AES-128-ECB * @deriving_key: Encryption key used for derivation. @@ -42,7 +31,7 @@ static int derive_key_aes(u8 deriving_key[FS_AES_128_ECB_KEY_SIZE], { int res = 0; struct skcipher_request *req = NULL; - DECLARE_FS_COMPLETION_RESULT(ecr); + DECLARE_CRYPTO_WAIT(wait); struct scatterlist src_sg, dst_sg; struct crypto_skcipher *tfm = crypto_alloc_skcipher("ecb(aes)", 0, 0); @@ -59,7 +48,7 @@ static int derive_key_aes(u8 deriving_key[FS_AES_128_ECB_KEY_SIZE], } skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP, - derive_crypt_complete, &ecr); + crypto_req_done, &wait); res = crypto_skcipher_setkey(tfm, deriving_key, FS_AES_128_ECB_KEY_SIZE); if (res < 0) @@ -69,11 +58,7 @@ static int derive_key_aes(u8 deriving_key[FS_AES_128_ECB_KEY_SIZE], sg_init_one(&dst_sg, derived_raw_key, source_key->size); skcipher_request_set_crypt(req, &src_sg, &dst_sg, source_key->size, NULL); - res = crypto_skcipher_encrypt(req); - if (res == -EINPROGRESS || res == -EBUSY) { - wait_for_completion(&ecr.completion); - res = ecr.res; - } + res = crypto_wait_req(crypto_skcipher_encrypt(req), &wait); out: skcipher_request_free(req); crypto_free_skcipher(tfm); -- 2.1.4
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