This patch does a combined memory allocation from heap for scatterlists, aead_request, aad and iv for the tls record decryption path. In present code, aead_request is allocated from heap, scatterlists on a conditional basis are allocated on heap or on stack. This is inefficient as it may requires multiple kmalloc/kfree.
The initialization vector passed in cryption request is allocated on stack. This is a problem since the stack memory is not dma-able from crypto accelerators. Doing one combined memory allocation for each decryption request fixes both the above issues. It also paves a way to be able to submit multiple async decryption requests while the previous one is pending i.e. being processed or queued. This patch has been built over Doron Roberts-Kedes's patch: "net/tls: Calculate nsg for zerocopy path without skb_cow_data" Vakul Garg (1): net/tls: Combined memory allocation for decryption request include/net/tls.h | 4 - net/tls/tls_sw.c | 256 +++++++++++++++++++++++++++++++----------------------- 2 files changed, 147 insertions(+), 113 deletions(-) -- 2.13.6
