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* crypto: scatterwalk - remove 'chain' argument from scatterwalk_crypto_chain()Eric Biggers2018-08-031-1/+1
| | | | | | | | | All callers pass chain=0 to scatterwalk_crypto_chain(). Remove this unneeded parameter. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Remove unnecessary aliasing check in map_and_copyHerbert Xu2016-11-221-4/+0
| | | | | | | | | | The aliasing check in map_and_copy is no longer necessary because the IPsec ESP code no longer provides an IV that points into the actual request data. As this check is now triggering BUG checks due to the vmalloced stack code, I'm removing it. Reported-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Inline start/map/doneHerbert Xu2016-07-181-43/+0
| | | | | | | | This patch inlines the functions scatterwalk_start, scatterwalk_map and scatterwalk_done as they're all tiny and mostly used by the block cipher walker. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Remove unnecessary BUG in scatterwalk_startHerbert Xu2016-07-181-3/+0
| | | | | | | Nothing bad will happen even if sg->length is zero, so there is no point in keeping this BUG_ON in scatterwalk_start. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Remove unnecessary advance in scatterwalk_pagedoneHerbert Xu2016-07-181-6/+2
| | | | | | | | | The offset advance in scatterwalk_pagedone not only is unnecessary, but it was also buggy when it was needed by scatterwalk_copychunks. As the latter has long ago been fixed to call scatterwalk_advance directly, we can remove this unnecessary offset adjustment. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Fix test in scatterwalk_doneHerbert Xu2016-07-181-1/+2
| | | | | | | | | | | | | | | | When there is more data to be processed, the current test in scatterwalk_done may prevent us from calling pagedone even when we should. In particular, if we're on an SG entry spanning multiple pages where the last page is not a full page, we will incorrectly skip calling pagedone on the second last page. This patch fixes this by adding a separate test for whether we've reached the end of a page. Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Add no-copy support to copychunksHerbert Xu2016-07-181-4/+6
| | | | | | | | | | | The function ablkcipher_done_slow is pretty much identical to scatterwalk_copychunks except that it doesn't actually copy as the processing hasn't been completed yet. This patch allows scatterwalk_copychunks to be used in this case by specifying out == 2. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Remove scatterwalk_bytes_sglenHerbert Xu2016-07-181-22/+0
| | | | | | | This patch removes the now unused scatterwalk_bytes_sglen. Anyone using this out-of-tree should switch over to sg_nents_for_len. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Hide PageSlab call to optimise away flush_dcache_pageHerbert Xu2015-06-031-1/+5
| | | | | | | | | | | | | On architectures where flush_dcache_page is not needed, we will end up generating all the code up to the PageSlab call. This is because PageSlab operates on a volatile pointer and thus cannot be optimised away. This patch works around this by checking whether flush_dcache_page is needed before we call PageSlab which then allows PageSlab to be compiled awy. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Add missing sg_init_table to scatterwalk_ffwdHerbert Xu2015-05-281-0/+1
| | | | | | | We need to call sg_init_table as otherwise the first entry may inadvertently become the last. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Check for same address in map_and_copyHerbert Xu2015-05-221-10/+6
| | | | | | | | | | | | | This patch adds a check for in scatterwalk_map_and_copy to avoid copying from the same address to the same address. This is going to be used for IV copying in AEAD IV generators. There is no provision for partial overlaps. This patch also uses the new scatterwalk_ffwd instead of doing it by hand in scatterwalk_map_and_copy. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Add scatterwalk_ffwd helperHerbert Xu2015-05-221-0/+22
| | | | | | | | | This patch adds the scatterwalk_ffwd helper which can create an SG list that starts in the middle of an existing SG list. The new list may either be part of the existing list or be a chain that latches onto part of the existing list. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: replace scatterwalk_sg_next with sg_nextCristian Stoica2015-01-261-3/+3
| | | | | | | | | | | | Modify crypto drivers to use the generic SG helper since both of them are equivalent and the one from crypto is redundant. See also: 468577abe37ff7b453a9ac613e0ea155349203ae reverted in b2ab4a57b018aafbba35bff088218f5cc3d2142e Signed-off-by: Cristian Stoica <cristian.stoica@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Add support for calculating number of SG elementsJoel Fernandes2013-08-211-0/+22
| | | | | | | | | Crypto layer only passes nbytes to encrypt but in omap-aes driver we need to know number of SG elements to pass to dmaengine slave API. We add function for the same to scatterwalk library. Signed-off-by: Joel Fernandes <joelf@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: remove the second argument of k[un]map_atomic()Cong Wang2012-03-201-4/+4
| | | | Signed-off-by: Cong Wang <amwang@redhat.com>
* crypto: scatterwalk - Fix scatterwalk_done() testDavid S. Miller2010-05-191-1/+1
| | | | | | | | | | | We are done with the scattergather entry when the walk offset goes past sg->offset + sg->length, not when it crosses a page boundary. There is a similarly queer test in the second half of scatterwalk_pagedone() that probably needs some scrutiny. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: scatterwalk - Avoid flush_dcache_page on slab pagesHerbert Xu2009-02-091-1/+2
| | | | | | | | | | | | It's illegal to call flush_dcache_page on slab pages on a number of architectures. So this patch avoids doing so if PageSlab is true. In future we can move the flush_dcache_page call to those page cache users that actually need it. Reported-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copyHerbert Xu2008-01-111-0/+3
| | | | | | | | It's better to return silently than crash and burn when someone feeds us a zero length. In particular the null digest algorithm when used as part of authenc will do that to us. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Restore custom sg chaining for nowHerbert Xu2008-01-111-2/+2
| | | | | | | | Unfortunately the generic chaining hasn't been ported to all architectures yet, and notably not s390. So this patch restores the chainging that we've been using previously which does work everywhere. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Move scatterwalk.h to linux/cryptoHerbert Xu2008-01-111-3/+2
| | | | | | | | The scatterwalk infrastructure is used by algorithms so it needs to move out of crypto for future users that may live in drivers/crypto or asm/*/crypto. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Use generic scatterlist chainingHerbert Xu2008-01-111-1/+1
| | | | | | | This patch converts the crypto scatterwalk code to use the generic scatterlist chaining rather the version specific to crypto. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [SG] Update crypto/ to sg helpersJens Axboe2007-10-221-1/+1
| | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* crypto: don't pollute the global namespace with sg_next()Jens Axboe2007-10-161-1/+1
| | | | | | | It's a subsystem function, prefix it as such. Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [CRYPTO] api: Kill crypto_km_typesHerbert Xu2007-10-101-8/+0
| | | | | | | | | | | | | When scatterwalk is built as a module digest.c was broken because it requires the crypto_km_types structure which is in scatterwalk. This patch removes the crypto_km_types structure by encoding the logic into crypto_kmap_type directly. In fact, this even saves a few bytes of code (not to mention the data structure itself) on i386 which is about the only place where it's needed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Add scatterwalk_map_and_copyHerbert Xu2007-10-101-0/+22
| | | | | | | | | This patch adds the function scatterwalk_map_and_copy which reads or writes a chunk of data from a scatterlist at a given offset. It will be used by authenc which would read/write the authentication data at the end of the cipher/plain text. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] api: Flush the current page right than the nextHerbert Xu2007-03-311-2/+6
| | | | | | | | On platforms where flush_dcache_page is needed we're currently flushing the next page right than the one we've just processed. This patch fixes the off-by-one error. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] api: Use the right value when advancing scatterwalk_copychunksHerbert Xu2007-03-311-1/+1
| | | | | | | In the scatterwalk_copychunks loop, We should be advancing by len_this_page and not nbytes. The latter is the total length. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] api: scatterwalk_copychunks() fails to advance through scatterlistJ. Bruce Fields2007-03-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the loop in scatterwalk_copychunks(), if walk->offset is zero, then scatterwalk_pagedone rounds that up to the nearest page boundary: walk->offset += PAGE_SIZE - 1; walk->offset &= PAGE_MASK; which is a no-op in this case, so we don't advance to the next element of the scatterlist array: if (walk->offset >= walk->sg->offset + walk->sg->length) scatterwalk_start(walk, sg_next(walk->sg)); and we end up copying the same data twice. It appears that other callers of scatterwalk_{page}done first advance walk->offset, so I believe that's the correct thing to do here. This caused a bug in NFS when run with krb5p security, which would cause some writes to fail with permissions errors--for example, writes of less than 8 bytes (the des blocksize) at the start of a file. A git-bisect shows the bug was originally introduced by 5c64097aa0f6dc4f27718ef47ca9a12538d62860, first in 2.6.19-rc1. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [CRYPTO] scatterwalk: Prepare for block ciphersHerbert Xu2006-09-211-49/+40
| | | | | | | | | | | | | | | | | | | | | This patch prepares the scatterwalk code for use by the new block cipher type. Firstly it halves the size of scatter_walk on 32-bit platforms. This is important as we allocate at least two of these objects on the stack for each block cipher operation. It also exports the symbols since the block cipher code can be built as a module. Finally there is a hack in scatterwalk_unmap that relies on progress being made. Unfortunately, for hardware crypto we can't guarantee progress to be made since the hardware can fail. So this also gets rid of the hack by not advancing the address returned by scatterwalk_map. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* [PATCH] remove bogus asm/bug.h includes.Al Viro2006-02-071-1/+0
| | | | | | | A bunch of asm/bug.h includes are both not needed (since it will get pulled anyway) and bogus (since they are done too early). Removed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [CRYPTO] Add plumbing for multi-block operationsHerbert Xu2005-07-061-2/+2
| | | | | | | | | | | | | | | | | | The VIA Padlock device is able to perform much better when multiple blocks are fed to it at once. As this device offers an exceptional throughput rate it is worthwhile to optimise the infrastructure specifically for it. We shift the existing page-sized fast path down to the CBC/ECB functions. We can then replace the CBC/ECB functions with functions provided by the underlying algorithm that performs the multi-block operations. As a side-effect this improves the performance of large cipher operations for all existing algorithm implementations. I've measured the gain to be around 5% for 3DES and 15% for AES. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+115
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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