From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- crypto/cryptd.c | 1130 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1130 insertions(+) create mode 100644 crypto/cryptd.c (limited to 'crypto/cryptd.c') diff --git a/crypto/cryptd.c b/crypto/cryptd.c new file mode 100644 index 000000000..37365ed30 --- /dev/null +++ b/crypto/cryptd.c @@ -0,0 +1,1130 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Software async crypto daemon. + * + * Copyright (c) 2006 Herbert Xu + * + * Added AEAD support to cryptd. + * Authors: Tadeusz Struk (tadeusz.struk@intel.com) + * Adrian Hoban + * Gabriele Paoloni + * Aidan O'Mahony (aidan.o.mahony@intel.com) + * Copyright (c) 2010, Intel Corporation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static unsigned int cryptd_max_cpu_qlen = 1000; +module_param(cryptd_max_cpu_qlen, uint, 0); +MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); + +static struct workqueue_struct *cryptd_wq; + +struct cryptd_cpu_queue { + struct crypto_queue queue; + struct work_struct work; +}; + +struct cryptd_queue { + /* + * Protected by disabling BH to allow enqueueing from softinterrupt and + * dequeuing from kworker (cryptd_queue_worker()). + */ + struct cryptd_cpu_queue __percpu *cpu_queue; +}; + +struct cryptd_instance_ctx { + struct crypto_spawn spawn; + struct cryptd_queue *queue; +}; + +struct skcipherd_instance_ctx { + struct crypto_skcipher_spawn spawn; + struct cryptd_queue *queue; +}; + +struct hashd_instance_ctx { + struct crypto_shash_spawn spawn; + struct cryptd_queue *queue; +}; + +struct aead_instance_ctx { + struct crypto_aead_spawn aead_spawn; + struct cryptd_queue *queue; +}; + +struct cryptd_skcipher_ctx { + refcount_t refcnt; + struct crypto_skcipher *child; +}; + +struct cryptd_skcipher_request_ctx { + struct skcipher_request req; +}; + +struct cryptd_hash_ctx { + refcount_t refcnt; + struct crypto_shash *child; +}; + +struct cryptd_hash_request_ctx { + crypto_completion_t complete; + void *data; + struct shash_desc desc; +}; + +struct cryptd_aead_ctx { + refcount_t refcnt; + struct crypto_aead *child; +}; + +struct cryptd_aead_request_ctx { + struct aead_request req; +}; + +static void cryptd_queue_worker(struct work_struct *work); + +static int cryptd_init_queue(struct cryptd_queue *queue, + unsigned int max_cpu_qlen) +{ + int cpu; + struct cryptd_cpu_queue *cpu_queue; + + queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); + if (!queue->cpu_queue) + return -ENOMEM; + for_each_possible_cpu(cpu) { + cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); + crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); + INIT_WORK(&cpu_queue->work, cryptd_queue_worker); + } + pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen); + return 0; +} + +static void cryptd_fini_queue(struct cryptd_queue *queue) +{ + int cpu; + struct cryptd_cpu_queue *cpu_queue; + + for_each_possible_cpu(cpu) { + cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); + BUG_ON(cpu_queue->queue.qlen); + } + free_percpu(queue->cpu_queue); +} + +static int cryptd_enqueue_request(struct cryptd_queue *queue, + struct crypto_async_request *request) +{ + int err; + struct cryptd_cpu_queue *cpu_queue; + refcount_t *refcnt; + + local_bh_disable(); + cpu_queue = this_cpu_ptr(queue->cpu_queue); + err = crypto_enqueue_request(&cpu_queue->queue, request); + + refcnt = crypto_tfm_ctx(request->tfm); + + if (err == -ENOSPC) + goto out; + + queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work); + + if (!refcount_read(refcnt)) + goto out; + + refcount_inc(refcnt); + +out: + local_bh_enable(); + + return err; +} + +/* Called in workqueue context, do one real cryption work (via + * req->complete) and reschedule itself if there are more work to + * do. */ +static void cryptd_queue_worker(struct work_struct *work) +{ + struct cryptd_cpu_queue *cpu_queue; + struct crypto_async_request *req, *backlog; + + cpu_queue = container_of(work, struct cryptd_cpu_queue, work); + /* + * Only handle one request at a time to avoid hogging crypto workqueue. + */ + local_bh_disable(); + backlog = crypto_get_backlog(&cpu_queue->queue); + req = crypto_dequeue_request(&cpu_queue->queue); + local_bh_enable(); + + if (!req) + return; + + if (backlog) + crypto_request_complete(backlog, -EINPROGRESS); + crypto_request_complete(req, 0); + + if (cpu_queue->queue.qlen) + queue_work(cryptd_wq, &cpu_queue->work); +} + +static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) +{ + struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); + struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); + return ictx->queue; +} + +static void cryptd_type_and_mask(struct crypto_attr_type *algt, + u32 *type, u32 *mask) +{ + /* + * cryptd is allowed to wrap internal algorithms, but in that case the + * resulting cryptd instance will be marked as internal as well. + */ + *type = algt->type & CRYPTO_ALG_INTERNAL; + *mask = algt->mask & CRYPTO_ALG_INTERNAL; + + /* No point in cryptd wrapping an algorithm that's already async. */ + *mask |= CRYPTO_ALG_ASYNC; + + *mask |= crypto_algt_inherited_mask(algt); +} + +static int cryptd_init_instance(struct crypto_instance *inst, + struct crypto_alg *alg) +{ + if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", + alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) + return -ENAMETOOLONG; + + memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); + + inst->alg.cra_priority = alg->cra_priority + 50; + inst->alg.cra_blocksize = alg->cra_blocksize; + inst->alg.cra_alignmask = alg->cra_alignmask; + + return 0; +} + +static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, + const u8 *key, unsigned int keylen) +{ + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); + struct crypto_skcipher *child = ctx->child; + + crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); + crypto_skcipher_set_flags(child, + crypto_skcipher_get_flags(parent) & + CRYPTO_TFM_REQ_MASK); + return crypto_skcipher_setkey(child, key, keylen); +} + +static struct skcipher_request *cryptd_skcipher_prepare( + struct skcipher_request *req, int err) +{ + struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); + struct skcipher_request *subreq = &rctx->req; + struct cryptd_skcipher_ctx *ctx; + struct crypto_skcipher *child; + + req->base.complete = subreq->base.complete; + req->base.data = subreq->base.data; + + if (unlikely(err == -EINPROGRESS)) + return NULL; + + ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); + child = ctx->child; + + skcipher_request_set_tfm(subreq, child); + skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, + NULL, NULL); + skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, + req->iv); + + return subreq; +} + +static void cryptd_skcipher_complete(struct skcipher_request *req, int err, + crypto_completion_t complete) +{ + struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_request *subreq = &rctx->req; + int refcnt = refcount_read(&ctx->refcnt); + + local_bh_disable(); + skcipher_request_complete(req, err); + local_bh_enable(); + + if (unlikely(err == -EINPROGRESS)) { + subreq->base.complete = req->base.complete; + subreq->base.data = req->base.data; + req->base.complete = complete; + req->base.data = req; + } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) + crypto_free_skcipher(tfm); +} + +static void cryptd_skcipher_encrypt(void *data, int err) +{ + struct skcipher_request *req = data; + struct skcipher_request *subreq; + + subreq = cryptd_skcipher_prepare(req, err); + if (likely(subreq)) + err = crypto_skcipher_encrypt(subreq); + + cryptd_skcipher_complete(req, err, cryptd_skcipher_encrypt); +} + +static void cryptd_skcipher_decrypt(void *data, int err) +{ + struct skcipher_request *req = data; + struct skcipher_request *subreq; + + subreq = cryptd_skcipher_prepare(req, err); + if (likely(subreq)) + err = crypto_skcipher_decrypt(subreq); + + cryptd_skcipher_complete(req, err, cryptd_skcipher_decrypt); +} + +static int cryptd_skcipher_enqueue(struct skcipher_request *req, + crypto_completion_t compl) +{ + struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct skcipher_request *subreq = &rctx->req; + struct cryptd_queue *queue; + + queue = cryptd_get_queue(crypto_skcipher_tfm(tfm)); + subreq->base.complete = req->base.complete; + subreq->base.data = req->base.data; + req->base.complete = compl; + req->base.data = req; + + return cryptd_enqueue_request(queue, &req->base); +} + +static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req) +{ + return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt); +} + +static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req) +{ + return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt); +} + +static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm) +{ + struct skcipher_instance *inst = skcipher_alg_instance(tfm); + struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst); + struct crypto_skcipher_spawn *spawn = &ictx->spawn; + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); + struct crypto_skcipher *cipher; + + cipher = crypto_spawn_skcipher(spawn); + if (IS_ERR(cipher)) + return PTR_ERR(cipher); + + ctx->child = cipher; + crypto_skcipher_set_reqsize( + tfm, sizeof(struct cryptd_skcipher_request_ctx) + + crypto_skcipher_reqsize(cipher)); + return 0; +} + +static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) +{ + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); + + crypto_free_skcipher(ctx->child); +} + +static void cryptd_skcipher_free(struct skcipher_instance *inst) +{ + struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); + + crypto_drop_skcipher(&ctx->spawn); + kfree(inst); +} + +static int cryptd_create_skcipher(struct crypto_template *tmpl, + struct rtattr **tb, + struct crypto_attr_type *algt, + struct cryptd_queue *queue) +{ + struct skcipherd_instance_ctx *ctx; + struct skcipher_instance *inst; + struct skcipher_alg *alg; + u32 type; + u32 mask; + int err; + + cryptd_type_and_mask(algt, &type, &mask); + + inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); + if (!inst) + return -ENOMEM; + + ctx = skcipher_instance_ctx(inst); + ctx->queue = queue; + + err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), type, mask); + if (err) + goto err_free_inst; + + alg = crypto_spawn_skcipher_alg(&ctx->spawn); + err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); + if (err) + goto err_free_inst; + + inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | + (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); + inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); + inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); + inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); + inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); + + inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx); + + inst->alg.init = cryptd_skcipher_init_tfm; + inst->alg.exit = cryptd_skcipher_exit_tfm; + + inst->alg.setkey = cryptd_skcipher_setkey; + inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue; + inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue; + + inst->free = cryptd_skcipher_free; + + err = skcipher_register_instance(tmpl, inst); + if (err) { +err_free_inst: + cryptd_skcipher_free(inst); + } + return err; +} + +static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) +{ + struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); + struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); + struct crypto_shash_spawn *spawn = &ictx->spawn; + struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_shash *hash; + + hash = crypto_spawn_shash(spawn); + if (IS_ERR(hash)) + return PTR_ERR(hash); + + ctx->child = hash; + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct cryptd_hash_request_ctx) + + crypto_shash_descsize(hash)); + return 0; +} + +static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) +{ + struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); + + crypto_free_shash(ctx->child); +} + +static int cryptd_hash_setkey(struct crypto_ahash *parent, + const u8 *key, unsigned int keylen) +{ + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); + struct crypto_shash *child = ctx->child; + + crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); + crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & + CRYPTO_TFM_REQ_MASK); + return crypto_shash_setkey(child, key, keylen); +} + +static int cryptd_hash_enqueue(struct ahash_request *req, + crypto_completion_t compl) +{ + struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct cryptd_queue *queue = + cryptd_get_queue(crypto_ahash_tfm(tfm)); + + rctx->complete = req->base.complete; + rctx->data = req->base.data; + req->base.complete = compl; + req->base.data = req; + + return cryptd_enqueue_request(queue, &req->base); +} + +static struct shash_desc *cryptd_hash_prepare(struct ahash_request *req, + int err) +{ + struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); + + req->base.complete = rctx->complete; + req->base.data = rctx->data; + + if (unlikely(err == -EINPROGRESS)) + return NULL; + + return &rctx->desc; +} + +static void cryptd_hash_complete(struct ahash_request *req, int err, + crypto_completion_t complete) +{ + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); + int refcnt = refcount_read(&ctx->refcnt); + + local_bh_disable(); + ahash_request_complete(req, err); + local_bh_enable(); + + if (err == -EINPROGRESS) { + req->base.complete = complete; + req->base.data = req; + } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) + crypto_free_ahash(tfm); +} + +static void cryptd_hash_init(void *data, int err) +{ + struct ahash_request *req = data; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); + struct crypto_shash *child = ctx->child; + struct shash_desc *desc; + + desc = cryptd_hash_prepare(req, err); + if (unlikely(!desc)) + goto out; + + desc->tfm = child; + + err = crypto_shash_init(desc); + +out: + cryptd_hash_complete(req, err, cryptd_hash_init); +} + +static int cryptd_hash_init_enqueue(struct ahash_request *req) +{ + return cryptd_hash_enqueue(req, cryptd_hash_init); +} + +static void cryptd_hash_update(void *data, int err) +{ + struct ahash_request *req = data; + struct shash_desc *desc; + + desc = cryptd_hash_prepare(req, err); + if (likely(desc)) + err = shash_ahash_update(req, desc); + + cryptd_hash_complete(req, err, cryptd_hash_update); +} + +static int cryptd_hash_update_enqueue(struct ahash_request *req) +{ + return cryptd_hash_enqueue(req, cryptd_hash_update); +} + +static void cryptd_hash_final(void *data, int err) +{ + struct ahash_request *req = data; + struct shash_desc *desc; + + desc = cryptd_hash_prepare(req, err); + if (likely(desc)) + err = crypto_shash_final(desc, req->result); + + cryptd_hash_complete(req, err, cryptd_hash_final); +} + +static int cryptd_hash_final_enqueue(struct ahash_request *req) +{ + return cryptd_hash_enqueue(req, cryptd_hash_final); +} + +static void cryptd_hash_finup(void *data, int err) +{ + struct ahash_request *req = data; + struct shash_desc *desc; + + desc = cryptd_hash_prepare(req, err); + if (likely(desc)) + err = shash_ahash_finup(req, desc); + + cryptd_hash_complete(req, err, cryptd_hash_finup); +} + +static int cryptd_hash_finup_enqueue(struct ahash_request *req) +{ + return cryptd_hash_enqueue(req, cryptd_hash_finup); +} + +static void cryptd_hash_digest(void *data, int err) +{ + struct ahash_request *req = data; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); + struct crypto_shash *child = ctx->child; + struct shash_desc *desc; + + desc = cryptd_hash_prepare(req, err); + if (unlikely(!desc)) + goto out; + + desc->tfm = child; + + err = shash_ahash_digest(req, desc); + +out: + cryptd_hash_complete(req, err, cryptd_hash_digest); +} + +static int cryptd_hash_digest_enqueue(struct ahash_request *req) +{ + return cryptd_hash_enqueue(req, cryptd_hash_digest); +} + +static int cryptd_hash_export(struct ahash_request *req, void *out) +{ + struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); + + return crypto_shash_export(&rctx->desc, out); +} + +static int cryptd_hash_import(struct ahash_request *req, const void *in) +{ + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); + struct shash_desc *desc = cryptd_shash_desc(req); + + desc->tfm = ctx->child; + + return crypto_shash_import(desc, in); +} + +static void cryptd_hash_free(struct ahash_instance *inst) +{ + struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst); + + crypto_drop_shash(&ctx->spawn); + kfree(inst); +} + +static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, + struct crypto_attr_type *algt, + struct cryptd_queue *queue) +{ + struct hashd_instance_ctx *ctx; + struct ahash_instance *inst; + struct shash_alg *alg; + u32 type; + u32 mask; + int err; + + cryptd_type_and_mask(algt, &type, &mask); + + inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); + if (!inst) + return -ENOMEM; + + ctx = ahash_instance_ctx(inst); + ctx->queue = queue; + + err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), type, mask); + if (err) + goto err_free_inst; + alg = crypto_spawn_shash_alg(&ctx->spawn); + + err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base); + if (err) + goto err_free_inst; + + inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC | + (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL| + CRYPTO_ALG_OPTIONAL_KEY)); + inst->alg.halg.digestsize = alg->digestsize; + inst->alg.halg.statesize = alg->statesize; + inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); + + inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; + inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; + + inst->alg.init = cryptd_hash_init_enqueue; + inst->alg.update = cryptd_hash_update_enqueue; + inst->alg.final = cryptd_hash_final_enqueue; + inst->alg.finup = cryptd_hash_finup_enqueue; + inst->alg.export = cryptd_hash_export; + inst->alg.import = cryptd_hash_import; + if (crypto_shash_alg_has_setkey(alg)) + inst->alg.setkey = cryptd_hash_setkey; + inst->alg.digest = cryptd_hash_digest_enqueue; + + inst->free = cryptd_hash_free; + + err = ahash_register_instance(tmpl, inst); + if (err) { +err_free_inst: + cryptd_hash_free(inst); + } + return err; +} + +static int cryptd_aead_setkey(struct crypto_aead *parent, + const u8 *key, unsigned int keylen) +{ + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); + struct crypto_aead *child = ctx->child; + + return crypto_aead_setkey(child, key, keylen); +} + +static int cryptd_aead_setauthsize(struct crypto_aead *parent, + unsigned int authsize) +{ + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); + struct crypto_aead *child = ctx->child; + + return crypto_aead_setauthsize(child, authsize); +} + +static void cryptd_aead_crypt(struct aead_request *req, + struct crypto_aead *child, int err, + int (*crypt)(struct aead_request *req), + crypto_completion_t compl) +{ + struct cryptd_aead_request_ctx *rctx; + struct aead_request *subreq; + struct cryptd_aead_ctx *ctx; + struct crypto_aead *tfm; + int refcnt; + + rctx = aead_request_ctx(req); + subreq = &rctx->req; + req->base.complete = subreq->base.complete; + req->base.data = subreq->base.data; + + tfm = crypto_aead_reqtfm(req); + + if (unlikely(err == -EINPROGRESS)) + goto out; + + aead_request_set_tfm(subreq, child); + aead_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, + NULL, NULL); + aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, + req->iv); + aead_request_set_ad(subreq, req->assoclen); + + err = crypt(subreq); + +out: + ctx = crypto_aead_ctx(tfm); + refcnt = refcount_read(&ctx->refcnt); + + local_bh_disable(); + aead_request_complete(req, err); + local_bh_enable(); + + if (err == -EINPROGRESS) { + subreq->base.complete = req->base.complete; + subreq->base.data = req->base.data; + req->base.complete = compl; + req->base.data = req; + } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) + crypto_free_aead(tfm); +} + +static void cryptd_aead_encrypt(void *data, int err) +{ + struct aead_request *req = data; + struct cryptd_aead_ctx *ctx; + struct crypto_aead *child; + + ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); + child = ctx->child; + cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt, + cryptd_aead_encrypt); +} + +static void cryptd_aead_decrypt(void *data, int err) +{ + struct aead_request *req = data; + struct cryptd_aead_ctx *ctx; + struct crypto_aead *child; + + ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); + child = ctx->child; + cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt, + cryptd_aead_decrypt); +} + +static int cryptd_aead_enqueue(struct aead_request *req, + crypto_completion_t compl) +{ + struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm)); + struct aead_request *subreq = &rctx->req; + + subreq->base.complete = req->base.complete; + subreq->base.data = req->base.data; + req->base.complete = compl; + req->base.data = req; + return cryptd_enqueue_request(queue, &req->base); +} + +static int cryptd_aead_encrypt_enqueue(struct aead_request *req) +{ + return cryptd_aead_enqueue(req, cryptd_aead_encrypt ); +} + +static int cryptd_aead_decrypt_enqueue(struct aead_request *req) +{ + return cryptd_aead_enqueue(req, cryptd_aead_decrypt ); +} + +static int cryptd_aead_init_tfm(struct crypto_aead *tfm) +{ + struct aead_instance *inst = aead_alg_instance(tfm); + struct aead_instance_ctx *ictx = aead_instance_ctx(inst); + struct crypto_aead_spawn *spawn = &ictx->aead_spawn; + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct crypto_aead *cipher; + + cipher = crypto_spawn_aead(spawn); + if (IS_ERR(cipher)) + return PTR_ERR(cipher); + + ctx->child = cipher; + crypto_aead_set_reqsize( + tfm, sizeof(struct cryptd_aead_request_ctx) + + crypto_aead_reqsize(cipher)); + return 0; +} + +static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) +{ + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); + crypto_free_aead(ctx->child); +} + +static void cryptd_aead_free(struct aead_instance *inst) +{ + struct aead_instance_ctx *ctx = aead_instance_ctx(inst); + + crypto_drop_aead(&ctx->aead_spawn); + kfree(inst); +} + +static int cryptd_create_aead(struct crypto_template *tmpl, + struct rtattr **tb, + struct crypto_attr_type *algt, + struct cryptd_queue *queue) +{ + struct aead_instance_ctx *ctx; + struct aead_instance *inst; + struct aead_alg *alg; + u32 type; + u32 mask; + int err; + + cryptd_type_and_mask(algt, &type, &mask); + + inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); + if (!inst) + return -ENOMEM; + + ctx = aead_instance_ctx(inst); + ctx->queue = queue; + + err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), type, mask); + if (err) + goto err_free_inst; + + alg = crypto_spawn_aead_alg(&ctx->aead_spawn); + err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); + if (err) + goto err_free_inst; + + inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | + (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); + inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); + + inst->alg.ivsize = crypto_aead_alg_ivsize(alg); + inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); + + inst->alg.init = cryptd_aead_init_tfm; + inst->alg.exit = cryptd_aead_exit_tfm; + inst->alg.setkey = cryptd_aead_setkey; + inst->alg.setauthsize = cryptd_aead_setauthsize; + inst->alg.encrypt = cryptd_aead_encrypt_enqueue; + inst->alg.decrypt = cryptd_aead_decrypt_enqueue; + + inst->free = cryptd_aead_free; + + err = aead_register_instance(tmpl, inst); + if (err) { +err_free_inst: + cryptd_aead_free(inst); + } + return err; +} + +static struct cryptd_queue queue; + +static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) +{ + struct crypto_attr_type *algt; + + algt = crypto_get_attr_type(tb); + if (IS_ERR(algt)) + return PTR_ERR(algt); + + switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_SKCIPHER: + return cryptd_create_skcipher(tmpl, tb, algt, &queue); + case CRYPTO_ALG_TYPE_HASH: + return cryptd_create_hash(tmpl, tb, algt, &queue); + case CRYPTO_ALG_TYPE_AEAD: + return cryptd_create_aead(tmpl, tb, algt, &queue); + } + + return -EINVAL; +} + +static struct crypto_template cryptd_tmpl = { + .name = "cryptd", + .create = cryptd_create, + .module = THIS_MODULE, +}; + +struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct cryptd_skcipher_ctx *ctx; + struct crypto_skcipher *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + + tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + + if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { + crypto_free_skcipher(tfm); + return ERR_PTR(-EINVAL); + } + + ctx = crypto_skcipher_ctx(tfm); + refcount_set(&ctx->refcnt, 1); + + return container_of(tfm, struct cryptd_skcipher, base); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher); + +struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm) +{ + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); + + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_skcipher_child); + +bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) +{ + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); + + return refcount_read(&ctx->refcnt) - 1; +} +EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); + +void cryptd_free_skcipher(struct cryptd_skcipher *tfm) +{ + struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); + + if (refcount_dec_and_test(&ctx->refcnt)) + crypto_free_skcipher(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_skcipher); + +struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct cryptd_hash_ctx *ctx; + struct crypto_ahash *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { + crypto_free_ahash(tfm); + return ERR_PTR(-EINVAL); + } + + ctx = crypto_ahash_ctx(tfm); + refcount_set(&ctx->refcnt, 1); + + return __cryptd_ahash_cast(tfm); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); + +struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) +{ + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); + + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_ahash_child); + +struct shash_desc *cryptd_shash_desc(struct ahash_request *req) +{ + struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); + return &rctx->desc; +} +EXPORT_SYMBOL_GPL(cryptd_shash_desc); + +bool cryptd_ahash_queued(struct cryptd_ahash *tfm) +{ + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); + + return refcount_read(&ctx->refcnt) - 1; +} +EXPORT_SYMBOL_GPL(cryptd_ahash_queued); + +void cryptd_free_ahash(struct cryptd_ahash *tfm) +{ + struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); + + if (refcount_dec_and_test(&ctx->refcnt)) + crypto_free_ahash(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_ahash); + +struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct cryptd_aead_ctx *ctx; + struct crypto_aead *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + tfm = crypto_alloc_aead(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { + crypto_free_aead(tfm); + return ERR_PTR(-EINVAL); + } + + ctx = crypto_aead_ctx(tfm); + refcount_set(&ctx->refcnt, 1); + + return __cryptd_aead_cast(tfm); +} +EXPORT_SYMBOL_GPL(cryptd_alloc_aead); + +struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm) +{ + struct cryptd_aead_ctx *ctx; + ctx = crypto_aead_ctx(&tfm->base); + return ctx->child; +} +EXPORT_SYMBOL_GPL(cryptd_aead_child); + +bool cryptd_aead_queued(struct cryptd_aead *tfm) +{ + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); + + return refcount_read(&ctx->refcnt) - 1; +} +EXPORT_SYMBOL_GPL(cryptd_aead_queued); + +void cryptd_free_aead(struct cryptd_aead *tfm) +{ + struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); + + if (refcount_dec_and_test(&ctx->refcnt)) + crypto_free_aead(&tfm->base); +} +EXPORT_SYMBOL_GPL(cryptd_free_aead); + +static int __init cryptd_init(void) +{ + int err; + + cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE, + 1); + if (!cryptd_wq) + return -ENOMEM; + + err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); + if (err) + goto err_destroy_wq; + + err = crypto_register_template(&cryptd_tmpl); + if (err) + goto err_fini_queue; + + return 0; + +err_fini_queue: + cryptd_fini_queue(&queue); +err_destroy_wq: + destroy_workqueue(cryptd_wq); + return err; +} + +static void __exit cryptd_exit(void) +{ + destroy_workqueue(cryptd_wq); + cryptd_fini_queue(&queue); + crypto_unregister_template(&cryptd_tmpl); +} + +subsys_initcall(cryptd_init); +module_exit(cryptd_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Software async crypto daemon"); +MODULE_ALIAS_CRYPTO("cryptd"); -- cgit v1.2.3