Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
crypto: acomp - Add ACOMP_FBREQ_ON_STACK
Add a helper to create an on-stack fallback request from a given
request. Use this helper in acomp_do_nondma.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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crypto/acompress.c
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crypto/acompress.c
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static int acomp_do_nondma(struct acomp_req *req, bool comp)
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{
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u32 keep = CRYPTO_ACOMP_REQ_SRC_VIRT |
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CRYPTO_ACOMP_REQ_SRC_NONDMA |
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CRYPTO_ACOMP_REQ_DST_VIRT |
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CRYPTO_ACOMP_REQ_DST_NONDMA;
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ACOMP_REQUEST_ON_STACK(fbreq, crypto_acomp_reqtfm(req));
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ACOMP_FBREQ_ON_STACK(fbreq, req);
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int err;
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acomp_request_set_callback(fbreq, req->base.flags, NULL, NULL);
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fbreq->base.flags &= ~keep;
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fbreq->base.flags |= req->base.flags & keep;
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fbreq->src = req->src;
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fbreq->dst = req->dst;
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fbreq->slen = req->slen;
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fbreq->dlen = req->dlen;
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if (comp)
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err = crypto_acomp_compress(fbreq);
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include/crypto/internal/acompress.h
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include/crypto/internal/acompress.h
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struct acomp_req *name = acomp_request_on_stack_init( \
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__##name##_req, (tfm), 0, true)
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#define ACOMP_FBREQ_ON_STACK(name, req) \
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char __##name##_req[sizeof(struct acomp_req) + \
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MAX_SYNC_COMP_REQSIZE] CRYPTO_MINALIGN_ATTR; \
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struct acomp_req *name = acomp_fbreq_on_stack_init( \
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__##name##_req, (req))
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/**
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* struct acomp_alg - asynchronous compression algorithm
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*
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static inline u32 acomp_request_flags(struct acomp_req *req)
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{
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return crypto_request_flags(&req->base) & ~CRYPTO_ACOMP_REQ_PRIVATE;
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}
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static inline struct acomp_req *acomp_fbreq_on_stack_init(
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char *buf, struct acomp_req *old)
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{
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struct crypto_acomp *tfm = crypto_acomp_reqtfm(old);
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struct acomp_req *req;
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req = acomp_request_on_stack_init(buf, tfm, 0, true);
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acomp_request_set_callback(req, acomp_request_flags(old), NULL, NULL);
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req->base.flags &= ~CRYPTO_ACOMP_REQ_PRIVATE;
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req->base.flags |= old->base.flags & CRYPTO_ACOMP_REQ_PRIVATE;
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req->src = old->src;
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req->dst = old->dst;
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req->slen = old->slen;
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req->dlen = old->dlen;
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req->soff = old->soff;
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req->doff = old->doff;
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return req;
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}
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#endif