Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 1130 insertions, 0 deletions

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 <herbert@gondor.apana.org.au>
+ *
+ * Added AEAD support to cryptd.
+ *    Authors: Tadeusz Struk (tadeusz.struk@intel.com)
+ *             Adrian Hoban <adrian.hoban@intel.com>
+ *             Gabriele Paoloni <gabriele.paoloni@intel.com>
+ *             Aidan O'Mahony (aidan.o.mahony@intel.com)
+ *    Copyright (c) 2010, Intel Corporation.
+ */
+
+#include <crypto/internal/hash.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/cryptd.h>
+#include <linux/refcount.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+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");