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![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from Davic Miller: 1) Support busy polling generically, for all NAPI drivers. From Eric Dumazet. 2) Add byte/packet counter support to nft_ct, from Floriani Westphal. 3) Add RSS/XPS support to mvneta driver, from Gregory Clement. 4) Implement IPV6_HDRINCL socket option for raw sockets, from Hannes Frederic Sowa. 5) Add support for T6 adapter to cxgb4 driver, from Hariprasad Shenai. 6) Add support for VLAN device bridging to mlxsw switch driver, from Ido Schimmel. 7) Add driver for Netronome NFP4000/NFP6000, from Jakub Kicinski. 8) Provide hwmon interface to mlxsw switch driver, from Jiri Pirko. 9) Reorganize wireless drivers into per-vendor directories just like we do for ethernet drivers. From Kalle Valo. 10) Provide a way for administrators "destroy" connected sockets via the SOCK_DESTROY socket netlink diag operation. From Lorenzo Colitti. 11) Add support to add/remove multicast routes via netlink, from Nikolay Aleksandrov. 12) Make TCP keepalive settings per-namespace, from Nikolay Borisov. 13) Add forwarding and packet duplication facilities to nf_tables, from Pablo Neira Ayuso. 14) Dead route support in MPLS, from Roopa Prabhu. 15) TSO support for thunderx chips, from Sunil Goutham. 16) Add driver for IBM's System i/p VNIC protocol, from Thomas Falcon. 17) Rationalize, consolidate, and more completely document the checksum offloading facilities in the networking stack. From Tom Herbert. 18) Support aborting an ongoing scan in mac80211/cfg80211, from Vidyullatha Kanchanapally. 19) Use per-bucket spinlock for bpf hash facility, from Tom Leiming. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1375 commits) net: bnxt: always return values from _bnxt_get_max_rings net: bpf: reject invalid shifts phonet: properly unshare skbs in phonet_rcv() dwc_eth_qos: Fix dma address for multi-fragment skbs phy: remove an unneeded condition mdio: remove an unneed condition mdio_bus: NULL dereference on allocation error net: Fix typo in netdev_intersect_features net: freescale: mac-fec: Fix build error from phy_device API change net: freescale: ucc_geth: Fix build error from phy_device API change bonding: Prevent IPv6 link local address on enslaved devices IB/mlx5: Add flow steering support net/mlx5_core: Export flow steering API net/mlx5_core: Make ipv4/ipv6 location more clear net/mlx5_core: Enable flow steering support for the IB driver net/mlx5_core: Initialize namespaces only when supported by device net/mlx5_core: Set priority attributes net/mlx5_core: Connect flow tables net/mlx5_core: Introduce modify flow table command net/mlx5_core: Managing root flow table ...
853 lines
18 KiB
C
853 lines
18 KiB
C
/*
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* algif_skcipher: User-space interface for skcipher algorithms
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*
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* This file provides the user-space API for symmetric key ciphers.
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*
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* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/scatterwalk.h>
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#include <crypto/skcipher.h>
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#include <crypto/if_alg.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/net.h>
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#include <net/sock.h>
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struct skcipher_sg_list {
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struct list_head list;
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int cur;
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struct scatterlist sg[0];
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};
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struct skcipher_ctx {
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struct list_head tsgl;
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struct af_alg_sgl rsgl;
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void *iv;
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struct af_alg_completion completion;
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atomic_t inflight;
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size_t used;
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unsigned int len;
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bool more;
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bool merge;
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bool enc;
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struct skcipher_request req;
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};
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struct skcipher_async_rsgl {
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struct af_alg_sgl sgl;
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struct list_head list;
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};
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struct skcipher_async_req {
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struct kiocb *iocb;
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struct skcipher_async_rsgl first_sgl;
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struct list_head list;
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struct scatterlist *tsg;
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char iv[];
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};
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#define GET_SREQ(areq, ctx) (struct skcipher_async_req *)((char *)areq + \
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crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req)))
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#define GET_REQ_SIZE(ctx) \
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crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req))
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#define GET_IV_SIZE(ctx) \
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crypto_skcipher_ivsize(crypto_skcipher_reqtfm(&ctx->req))
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#define MAX_SGL_ENTS ((4096 - sizeof(struct skcipher_sg_list)) / \
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sizeof(struct scatterlist) - 1)
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static void skcipher_free_async_sgls(struct skcipher_async_req *sreq)
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{
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struct skcipher_async_rsgl *rsgl, *tmp;
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struct scatterlist *sgl;
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struct scatterlist *sg;
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int i, n;
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list_for_each_entry_safe(rsgl, tmp, &sreq->list, list) {
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af_alg_free_sg(&rsgl->sgl);
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if (rsgl != &sreq->first_sgl)
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kfree(rsgl);
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}
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sgl = sreq->tsg;
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n = sg_nents(sgl);
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for_each_sg(sgl, sg, n, i)
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put_page(sg_page(sg));
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kfree(sreq->tsg);
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}
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static void skcipher_async_cb(struct crypto_async_request *req, int err)
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{
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struct sock *sk = req->data;
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_async_req *sreq = GET_SREQ(req, ctx);
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struct kiocb *iocb = sreq->iocb;
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atomic_dec(&ctx->inflight);
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skcipher_free_async_sgls(sreq);
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kfree(req);
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iocb->ki_complete(iocb, err, err);
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}
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static inline int skcipher_sndbuf(struct sock *sk)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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return max_t(int, max_t(int, sk->sk_sndbuf & PAGE_MASK, PAGE_SIZE) -
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ctx->used, 0);
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}
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static inline bool skcipher_writable(struct sock *sk)
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{
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return PAGE_SIZE <= skcipher_sndbuf(sk);
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}
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static int skcipher_alloc_sgl(struct sock *sk)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_sg_list *sgl;
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struct scatterlist *sg = NULL;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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if (!list_empty(&ctx->tsgl))
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sg = sgl->sg;
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if (!sg || sgl->cur >= MAX_SGL_ENTS) {
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sgl = sock_kmalloc(sk, sizeof(*sgl) +
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sizeof(sgl->sg[0]) * (MAX_SGL_ENTS + 1),
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GFP_KERNEL);
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if (!sgl)
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return -ENOMEM;
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sg_init_table(sgl->sg, MAX_SGL_ENTS + 1);
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sgl->cur = 0;
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if (sg)
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sg_chain(sg, MAX_SGL_ENTS + 1, sgl->sg);
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list_add_tail(&sgl->list, &ctx->tsgl);
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}
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return 0;
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}
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static void skcipher_pull_sgl(struct sock *sk, size_t used, int put)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_sg_list *sgl;
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struct scatterlist *sg;
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int i;
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while (!list_empty(&ctx->tsgl)) {
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sgl = list_first_entry(&ctx->tsgl, struct skcipher_sg_list,
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list);
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sg = sgl->sg;
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for (i = 0; i < sgl->cur; i++) {
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size_t plen = min_t(size_t, used, sg[i].length);
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if (!sg_page(sg + i))
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continue;
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sg[i].length -= plen;
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sg[i].offset += plen;
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used -= plen;
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ctx->used -= plen;
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if (sg[i].length)
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return;
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if (put)
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put_page(sg_page(sg + i));
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sg_assign_page(sg + i, NULL);
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}
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list_del(&sgl->list);
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sock_kfree_s(sk, sgl,
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sizeof(*sgl) + sizeof(sgl->sg[0]) *
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(MAX_SGL_ENTS + 1));
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}
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if (!ctx->used)
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ctx->merge = 0;
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}
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static void skcipher_free_sgl(struct sock *sk)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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skcipher_pull_sgl(sk, ctx->used, 1);
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}
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static int skcipher_wait_for_wmem(struct sock *sk, unsigned flags)
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{
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long timeout;
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DEFINE_WAIT(wait);
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int err = -ERESTARTSYS;
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if (flags & MSG_DONTWAIT)
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return -EAGAIN;
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sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
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for (;;) {
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if (signal_pending(current))
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break;
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prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
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timeout = MAX_SCHEDULE_TIMEOUT;
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if (sk_wait_event(sk, &timeout, skcipher_writable(sk))) {
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err = 0;
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break;
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}
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}
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finish_wait(sk_sleep(sk), &wait);
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return err;
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}
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static void skcipher_wmem_wakeup(struct sock *sk)
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{
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struct socket_wq *wq;
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if (!skcipher_writable(sk))
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return;
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rcu_read_lock();
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wq = rcu_dereference(sk->sk_wq);
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if (skwq_has_sleeper(wq))
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wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
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POLLRDNORM |
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POLLRDBAND);
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sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
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rcu_read_unlock();
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}
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static int skcipher_wait_for_data(struct sock *sk, unsigned flags)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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long timeout;
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DEFINE_WAIT(wait);
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int err = -ERESTARTSYS;
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if (flags & MSG_DONTWAIT) {
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return -EAGAIN;
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}
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sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
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for (;;) {
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if (signal_pending(current))
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break;
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prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
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timeout = MAX_SCHEDULE_TIMEOUT;
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if (sk_wait_event(sk, &timeout, ctx->used)) {
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err = 0;
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break;
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}
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}
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finish_wait(sk_sleep(sk), &wait);
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sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
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return err;
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}
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static void skcipher_data_wakeup(struct sock *sk)
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{
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct socket_wq *wq;
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if (!ctx->used)
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return;
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rcu_read_lock();
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wq = rcu_dereference(sk->sk_wq);
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if (skwq_has_sleeper(wq))
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wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
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POLLRDNORM |
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POLLRDBAND);
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sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
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rcu_read_unlock();
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}
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static int skcipher_sendmsg(struct socket *sock, struct msghdr *msg,
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size_t size)
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{
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struct sock *sk = sock->sk;
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(&ctx->req);
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unsigned ivsize = crypto_skcipher_ivsize(tfm);
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struct skcipher_sg_list *sgl;
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struct af_alg_control con = {};
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long copied = 0;
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bool enc = 0;
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bool init = 0;
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int err;
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int i;
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if (msg->msg_controllen) {
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err = af_alg_cmsg_send(msg, &con);
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if (err)
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return err;
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init = 1;
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switch (con.op) {
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case ALG_OP_ENCRYPT:
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enc = 1;
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break;
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case ALG_OP_DECRYPT:
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enc = 0;
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break;
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default:
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return -EINVAL;
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}
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if (con.iv && con.iv->ivlen != ivsize)
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return -EINVAL;
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}
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err = -EINVAL;
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lock_sock(sk);
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if (!ctx->more && ctx->used)
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goto unlock;
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if (init) {
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ctx->enc = enc;
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if (con.iv)
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memcpy(ctx->iv, con.iv->iv, ivsize);
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}
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while (size) {
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struct scatterlist *sg;
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unsigned long len = size;
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size_t plen;
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if (ctx->merge) {
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sgl = list_entry(ctx->tsgl.prev,
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struct skcipher_sg_list, list);
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sg = sgl->sg + sgl->cur - 1;
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len = min_t(unsigned long, len,
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PAGE_SIZE - sg->offset - sg->length);
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err = memcpy_from_msg(page_address(sg_page(sg)) +
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sg->offset + sg->length,
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msg, len);
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if (err)
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goto unlock;
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sg->length += len;
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ctx->merge = (sg->offset + sg->length) &
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(PAGE_SIZE - 1);
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ctx->used += len;
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copied += len;
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size -= len;
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continue;
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}
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if (!skcipher_writable(sk)) {
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err = skcipher_wait_for_wmem(sk, msg->msg_flags);
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if (err)
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goto unlock;
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}
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len = min_t(unsigned long, len, skcipher_sndbuf(sk));
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err = skcipher_alloc_sgl(sk);
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if (err)
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goto unlock;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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sg = sgl->sg;
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sg_unmark_end(sg + sgl->cur);
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do {
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i = sgl->cur;
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plen = min_t(size_t, len, PAGE_SIZE);
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sg_assign_page(sg + i, alloc_page(GFP_KERNEL));
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err = -ENOMEM;
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if (!sg_page(sg + i))
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goto unlock;
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err = memcpy_from_msg(page_address(sg_page(sg + i)),
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msg, plen);
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if (err) {
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__free_page(sg_page(sg + i));
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sg_assign_page(sg + i, NULL);
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goto unlock;
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}
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sg[i].length = plen;
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len -= plen;
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ctx->used += plen;
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copied += plen;
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size -= plen;
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sgl->cur++;
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} while (len && sgl->cur < MAX_SGL_ENTS);
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if (!size)
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sg_mark_end(sg + sgl->cur - 1);
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ctx->merge = plen & (PAGE_SIZE - 1);
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}
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err = 0;
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ctx->more = msg->msg_flags & MSG_MORE;
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unlock:
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skcipher_data_wakeup(sk);
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release_sock(sk);
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return copied ?: err;
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}
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static ssize_t skcipher_sendpage(struct socket *sock, struct page *page,
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int offset, size_t size, int flags)
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{
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struct sock *sk = sock->sk;
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struct alg_sock *ask = alg_sk(sk);
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struct skcipher_ctx *ctx = ask->private;
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struct skcipher_sg_list *sgl;
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int err = -EINVAL;
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if (flags & MSG_SENDPAGE_NOTLAST)
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flags |= MSG_MORE;
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lock_sock(sk);
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if (!ctx->more && ctx->used)
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goto unlock;
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if (!size)
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goto done;
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if (!skcipher_writable(sk)) {
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err = skcipher_wait_for_wmem(sk, flags);
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if (err)
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goto unlock;
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}
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err = skcipher_alloc_sgl(sk);
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if (err)
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goto unlock;
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ctx->merge = 0;
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sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list);
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if (sgl->cur)
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sg_unmark_end(sgl->sg + sgl->cur - 1);
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sg_mark_end(sgl->sg + sgl->cur);
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get_page(page);
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sg_set_page(sgl->sg + sgl->cur, page, size, offset);
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sgl->cur++;
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ctx->used += size;
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done:
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ctx->more = flags & MSG_MORE;
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unlock:
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skcipher_data_wakeup(sk);
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release_sock(sk);
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return err ?: size;
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}
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static int skcipher_all_sg_nents(struct skcipher_ctx *ctx)
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{
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struct skcipher_sg_list *sgl;
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struct scatterlist *sg;
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int nents = 0;
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list_for_each_entry(sgl, &ctx->tsgl, list) {
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sg = sgl->sg;
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while (!sg->length)
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sg++;
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nents += sg_nents(sg);
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}
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return nents;
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}
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static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
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int flags)
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{
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struct sock *sk = sock->sk;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
struct skcipher_sg_list *sgl;
|
|
struct scatterlist *sg;
|
|
struct skcipher_async_req *sreq;
|
|
struct skcipher_request *req;
|
|
struct skcipher_async_rsgl *last_rsgl = NULL;
|
|
unsigned int txbufs = 0, len = 0, tx_nents = skcipher_all_sg_nents(ctx);
|
|
unsigned int reqlen = sizeof(struct skcipher_async_req) +
|
|
GET_REQ_SIZE(ctx) + GET_IV_SIZE(ctx);
|
|
int err = -ENOMEM;
|
|
bool mark = false;
|
|
|
|
lock_sock(sk);
|
|
req = kmalloc(reqlen, GFP_KERNEL);
|
|
if (unlikely(!req))
|
|
goto unlock;
|
|
|
|
sreq = GET_SREQ(req, ctx);
|
|
sreq->iocb = msg->msg_iocb;
|
|
memset(&sreq->first_sgl, '\0', sizeof(struct skcipher_async_rsgl));
|
|
INIT_LIST_HEAD(&sreq->list);
|
|
sreq->tsg = kcalloc(tx_nents, sizeof(*sg), GFP_KERNEL);
|
|
if (unlikely(!sreq->tsg)) {
|
|
kfree(req);
|
|
goto unlock;
|
|
}
|
|
sg_init_table(sreq->tsg, tx_nents);
|
|
memcpy(sreq->iv, ctx->iv, GET_IV_SIZE(ctx));
|
|
skcipher_request_set_tfm(req, crypto_skcipher_reqtfm(&ctx->req));
|
|
skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
|
|
skcipher_async_cb, sk);
|
|
|
|
while (iov_iter_count(&msg->msg_iter)) {
|
|
struct skcipher_async_rsgl *rsgl;
|
|
int used;
|
|
|
|
if (!ctx->used) {
|
|
err = skcipher_wait_for_data(sk, flags);
|
|
if (err)
|
|
goto free;
|
|
}
|
|
sgl = list_first_entry(&ctx->tsgl,
|
|
struct skcipher_sg_list, list);
|
|
sg = sgl->sg;
|
|
|
|
while (!sg->length)
|
|
sg++;
|
|
|
|
used = min_t(unsigned long, ctx->used,
|
|
iov_iter_count(&msg->msg_iter));
|
|
used = min_t(unsigned long, used, sg->length);
|
|
|
|
if (txbufs == tx_nents) {
|
|
struct scatterlist *tmp;
|
|
int x;
|
|
/* Ran out of tx slots in async request
|
|
* need to expand */
|
|
tmp = kcalloc(tx_nents * 2, sizeof(*tmp),
|
|
GFP_KERNEL);
|
|
if (!tmp)
|
|
goto free;
|
|
|
|
sg_init_table(tmp, tx_nents * 2);
|
|
for (x = 0; x < tx_nents; x++)
|
|
sg_set_page(&tmp[x], sg_page(&sreq->tsg[x]),
|
|
sreq->tsg[x].length,
|
|
sreq->tsg[x].offset);
|
|
kfree(sreq->tsg);
|
|
sreq->tsg = tmp;
|
|
tx_nents *= 2;
|
|
mark = true;
|
|
}
|
|
/* Need to take over the tx sgl from ctx
|
|
* to the asynch req - these sgls will be freed later */
|
|
sg_set_page(sreq->tsg + txbufs++, sg_page(sg), sg->length,
|
|
sg->offset);
|
|
|
|
if (list_empty(&sreq->list)) {
|
|
rsgl = &sreq->first_sgl;
|
|
list_add_tail(&rsgl->list, &sreq->list);
|
|
} else {
|
|
rsgl = kmalloc(sizeof(*rsgl), GFP_KERNEL);
|
|
if (!rsgl) {
|
|
err = -ENOMEM;
|
|
goto free;
|
|
}
|
|
list_add_tail(&rsgl->list, &sreq->list);
|
|
}
|
|
|
|
used = af_alg_make_sg(&rsgl->sgl, &msg->msg_iter, used);
|
|
err = used;
|
|
if (used < 0)
|
|
goto free;
|
|
if (last_rsgl)
|
|
af_alg_link_sg(&last_rsgl->sgl, &rsgl->sgl);
|
|
|
|
last_rsgl = rsgl;
|
|
len += used;
|
|
skcipher_pull_sgl(sk, used, 0);
|
|
iov_iter_advance(&msg->msg_iter, used);
|
|
}
|
|
|
|
if (mark)
|
|
sg_mark_end(sreq->tsg + txbufs - 1);
|
|
|
|
skcipher_request_set_crypt(req, sreq->tsg, sreq->first_sgl.sgl.sg,
|
|
len, sreq->iv);
|
|
err = ctx->enc ? crypto_skcipher_encrypt(req) :
|
|
crypto_skcipher_decrypt(req);
|
|
if (err == -EINPROGRESS) {
|
|
atomic_inc(&ctx->inflight);
|
|
err = -EIOCBQUEUED;
|
|
goto unlock;
|
|
}
|
|
free:
|
|
skcipher_free_async_sgls(sreq);
|
|
kfree(req);
|
|
unlock:
|
|
skcipher_wmem_wakeup(sk);
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int skcipher_recvmsg_sync(struct socket *sock, struct msghdr *msg,
|
|
int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
unsigned bs = crypto_skcipher_blocksize(crypto_skcipher_reqtfm(
|
|
&ctx->req));
|
|
struct skcipher_sg_list *sgl;
|
|
struct scatterlist *sg;
|
|
int err = -EAGAIN;
|
|
int used;
|
|
long copied = 0;
|
|
|
|
lock_sock(sk);
|
|
while (msg_data_left(msg)) {
|
|
sgl = list_first_entry(&ctx->tsgl,
|
|
struct skcipher_sg_list, list);
|
|
sg = sgl->sg;
|
|
|
|
while (!sg->length)
|
|
sg++;
|
|
|
|
if (!ctx->used) {
|
|
err = skcipher_wait_for_data(sk, flags);
|
|
if (err)
|
|
goto unlock;
|
|
}
|
|
|
|
used = min_t(unsigned long, ctx->used, msg_data_left(msg));
|
|
|
|
used = af_alg_make_sg(&ctx->rsgl, &msg->msg_iter, used);
|
|
err = used;
|
|
if (err < 0)
|
|
goto unlock;
|
|
|
|
if (ctx->more || used < ctx->used)
|
|
used -= used % bs;
|
|
|
|
err = -EINVAL;
|
|
if (!used)
|
|
goto free;
|
|
|
|
skcipher_request_set_crypt(&ctx->req, sg, ctx->rsgl.sg, used,
|
|
ctx->iv);
|
|
|
|
err = af_alg_wait_for_completion(
|
|
ctx->enc ?
|
|
crypto_skcipher_encrypt(&ctx->req) :
|
|
crypto_skcipher_decrypt(&ctx->req),
|
|
&ctx->completion);
|
|
|
|
free:
|
|
af_alg_free_sg(&ctx->rsgl);
|
|
|
|
if (err)
|
|
goto unlock;
|
|
|
|
copied += used;
|
|
skcipher_pull_sgl(sk, used, 1);
|
|
iov_iter_advance(&msg->msg_iter, used);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
unlock:
|
|
skcipher_wmem_wakeup(sk);
|
|
release_sock(sk);
|
|
|
|
return copied ?: err;
|
|
}
|
|
|
|
static int skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t ignored, int flags)
|
|
{
|
|
return (msg->msg_iocb && !is_sync_kiocb(msg->msg_iocb)) ?
|
|
skcipher_recvmsg_async(sock, msg, flags) :
|
|
skcipher_recvmsg_sync(sock, msg, flags);
|
|
}
|
|
|
|
static unsigned int skcipher_poll(struct file *file, struct socket *sock,
|
|
poll_table *wait)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
unsigned int mask;
|
|
|
|
sock_poll_wait(file, sk_sleep(sk), wait);
|
|
mask = 0;
|
|
|
|
if (ctx->used)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
if (skcipher_writable(sk))
|
|
mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static struct proto_ops algif_skcipher_ops = {
|
|
.family = PF_ALG,
|
|
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.getname = sock_no_getname,
|
|
.ioctl = sock_no_ioctl,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.getsockopt = sock_no_getsockopt,
|
|
.mmap = sock_no_mmap,
|
|
.bind = sock_no_bind,
|
|
.accept = sock_no_accept,
|
|
.setsockopt = sock_no_setsockopt,
|
|
|
|
.release = af_alg_release,
|
|
.sendmsg = skcipher_sendmsg,
|
|
.sendpage = skcipher_sendpage,
|
|
.recvmsg = skcipher_recvmsg,
|
|
.poll = skcipher_poll,
|
|
};
|
|
|
|
static void *skcipher_bind(const char *name, u32 type, u32 mask)
|
|
{
|
|
return crypto_alloc_skcipher(name, type, mask);
|
|
}
|
|
|
|
static void skcipher_release(void *private)
|
|
{
|
|
crypto_free_skcipher(private);
|
|
}
|
|
|
|
static int skcipher_setkey(void *private, const u8 *key, unsigned int keylen)
|
|
{
|
|
return crypto_skcipher_setkey(private, key, keylen);
|
|
}
|
|
|
|
static void skcipher_wait(struct sock *sk)
|
|
{
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
int ctr = 0;
|
|
|
|
while (atomic_read(&ctx->inflight) && ctr++ < 100)
|
|
msleep(100);
|
|
}
|
|
|
|
static void skcipher_sock_destruct(struct sock *sk)
|
|
{
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
struct skcipher_ctx *ctx = ask->private;
|
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(&ctx->req);
|
|
|
|
if (atomic_read(&ctx->inflight))
|
|
skcipher_wait(sk);
|
|
|
|
skcipher_free_sgl(sk);
|
|
sock_kzfree_s(sk, ctx->iv, crypto_skcipher_ivsize(tfm));
|
|
sock_kfree_s(sk, ctx, ctx->len);
|
|
af_alg_release_parent(sk);
|
|
}
|
|
|
|
static int skcipher_accept_parent(void *private, struct sock *sk)
|
|
{
|
|
struct skcipher_ctx *ctx;
|
|
struct alg_sock *ask = alg_sk(sk);
|
|
unsigned int len = sizeof(*ctx) + crypto_skcipher_reqsize(private);
|
|
|
|
ctx = sock_kmalloc(sk, len, GFP_KERNEL);
|
|
if (!ctx)
|
|
return -ENOMEM;
|
|
|
|
ctx->iv = sock_kmalloc(sk, crypto_skcipher_ivsize(private),
|
|
GFP_KERNEL);
|
|
if (!ctx->iv) {
|
|
sock_kfree_s(sk, ctx, len);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(ctx->iv, 0, crypto_skcipher_ivsize(private));
|
|
|
|
INIT_LIST_HEAD(&ctx->tsgl);
|
|
ctx->len = len;
|
|
ctx->used = 0;
|
|
ctx->more = 0;
|
|
ctx->merge = 0;
|
|
ctx->enc = 0;
|
|
atomic_set(&ctx->inflight, 0);
|
|
af_alg_init_completion(&ctx->completion);
|
|
|
|
ask->private = ctx;
|
|
|
|
skcipher_request_set_tfm(&ctx->req, private);
|
|
skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
|
|
af_alg_complete, &ctx->completion);
|
|
|
|
sk->sk_destruct = skcipher_sock_destruct;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct af_alg_type algif_type_skcipher = {
|
|
.bind = skcipher_bind,
|
|
.release = skcipher_release,
|
|
.setkey = skcipher_setkey,
|
|
.accept = skcipher_accept_parent,
|
|
.ops = &algif_skcipher_ops,
|
|
.name = "skcipher",
|
|
.owner = THIS_MODULE
|
|
};
|
|
|
|
static int __init algif_skcipher_init(void)
|
|
{
|
|
return af_alg_register_type(&algif_type_skcipher);
|
|
}
|
|
|
|
static void __exit algif_skcipher_exit(void)
|
|
{
|
|
int err = af_alg_unregister_type(&algif_type_skcipher);
|
|
BUG_ON(err);
|
|
}
|
|
|
|
module_init(algif_skcipher_init);
|
|
module_exit(algif_skcipher_exit);
|
|
MODULE_LICENSE("GPL");
|