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Revision 5f4fc6d440d77a2cf74fe4ea56955674ac7e35e7 authored by Linus Torvalds on 19 July 2019, 17:06:06 UTC, committed by Linus Torvalds on 19 July 2019, 17:06:06 UTC 
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
 
Pull networking fixes from David Miller:

 1) Fix AF_XDP cq entry leak, from Ilya Maximets.

 2) Fix handling of PHY power-down on RTL8411B, from Heiner Kallweit.

 3) Add some new PCI IDs to iwlwifi, from Ihab Zhaika.

 4) Fix handling of neigh timers wrt. entries added by userspace, from
    Lorenzo Bianconi.

 5) Various cases of missing of_node_put(), from Nishka Dasgupta.

 6) The new NET_ACT_CT needs to depend upon NF_NAT, from Yue Haibing.

 7) Various RDS layer fixes, from Gerd Rausch.

 8) Fix some more fallout from TCQ_F_CAN_BYPASS generalization, from
    Cong Wang.

 9) Fix FIB source validation checks over loopback, also from Cong Wang.

10) Use promisc for unsupported number of filters, from Justin Chen.

11) Missing sibling route unlink on failure in ipv6, from Ido Schimmel.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (90 commits)
  tcp: fix tcp_set_congestion_control() use from bpf hook
  ag71xx: fix return value check in ag71xx_probe()
  ag71xx: fix error return code in ag71xx_probe()
  usb: qmi_wwan: add D-Link DWM-222 A2 device ID
  bnxt_en: Fix VNIC accounting when enabling aRFS on 57500 chips.
  net: dsa: sja1105: Fix missing unlock on error in sk_buff()
  gve: replace kfree with kvfree
  selftests/bpf: fix test_xdp_noinline on s390
  selftests/bpf: fix "valid read map access into a read-only array 1" on s390
  net/mlx5: Replace kfree with kvfree
  MAINTAINERS: update netsec driver
  ipv6: Unlink sibling route in case of failure
  liquidio: Replace vmalloc + memset with vzalloc
  udp: Fix typo in net/ipv4/udp.c
  net: bcmgenet: use promisc for unsupported filters
  ipv6: rt6_check should return NULL if 'from' is NULL
  tipc: initialize 'validated' field of received packets
  selftests: add a test case for rp_filter
  fib: relax source validation check for loopback packets
  mlxsw: spectrum: Do not process learned records with a dummy FID
  ...
2 parent s 249be85 + 8d650cd
Raw File
crc-t10dif.c 
// SPDX-License-Identifier: GPL-2.0-only
/*
 * T10 Data Integrity Field CRC16 calculation
 *
 * Copyright (c) 2007 Oracle Corporation.  All rights reserved.
 * Written by Martin K. Petersen <martin.petersen@oracle.com>
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/crc-t10dif.h>
#include <linux/err.h>
#include <linux/init.h>
#include <crypto/hash.h>
#include <crypto/algapi.h>
#include <linux/static_key.h>
#include <linux/notifier.h>

static struct crypto_shash __rcu *crct10dif_tfm;
static struct static_key crct10dif_fallback __read_mostly;
static DEFINE_MUTEX(crc_t10dif_mutex);

static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data)
{
	struct crypto_alg *alg = data;
	struct crypto_shash *new, *old;

	if (val != CRYPTO_MSG_ALG_LOADED ||
	    static_key_false(&crct10dif_fallback) ||
	    strncmp(alg->cra_name, CRC_T10DIF_STRING, strlen(CRC_T10DIF_STRING)))
		return 0;

	mutex_lock(&crc_t10dif_mutex);
	old = rcu_dereference_protected(crct10dif_tfm,
					lockdep_is_held(&crc_t10dif_mutex));
	if (!old) {
		mutex_unlock(&crc_t10dif_mutex);
		return 0;
	}
	new = crypto_alloc_shash("crct10dif", 0, 0);
	if (IS_ERR(new)) {
		mutex_unlock(&crc_t10dif_mutex);
		return 0;
	}
	rcu_assign_pointer(crct10dif_tfm, new);
	mutex_unlock(&crc_t10dif_mutex);

	synchronize_rcu();
	crypto_free_shash(old);
	return 0;
}

static struct notifier_block crc_t10dif_nb = {
	.notifier_call = crc_t10dif_rehash,
};

__u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len)
{
	struct {
		struct shash_desc shash;
		char ctx[2];
	} desc;
	int err;

	if (static_key_false(&crct10dif_fallback))
		return crc_t10dif_generic(crc, buffer, len);

	rcu_read_lock();
	desc.shash.tfm = rcu_dereference(crct10dif_tfm);
	*(__u16 *)desc.ctx = crc;

	err = crypto_shash_update(&desc.shash, buffer, len);
	rcu_read_unlock();

	BUG_ON(err);

	return *(__u16 *)desc.ctx;
}
EXPORT_SYMBOL(crc_t10dif_update);

__u16 crc_t10dif(const unsigned char *buffer, size_t len)
{
	return crc_t10dif_update(0, buffer, len);
}
EXPORT_SYMBOL(crc_t10dif);

static int __init crc_t10dif_mod_init(void)
{
	crypto_register_notifier(&crc_t10dif_nb);
	crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
	if (IS_ERR(crct10dif_tfm)) {
		static_key_slow_inc(&crct10dif_fallback);
		crct10dif_tfm = NULL;
	}
	return 0;
}

static void __exit crc_t10dif_mod_fini(void)
{
	crypto_unregister_notifier(&crc_t10dif_nb);
	crypto_free_shash(crct10dif_tfm);
}

module_init(crc_t10dif_mod_init);
module_exit(crc_t10dif_mod_fini);

static int crc_t10dif_transform_show(char *buffer, const struct kernel_param *kp)
{
	if (static_key_false(&crct10dif_fallback))
		return sprintf(buffer, "fallback\n");

	return sprintf(buffer, "%s\n",
		crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm)));
}

module_param_call(transform, NULL, crc_t10dif_transform_show, NULL, 0644);

MODULE_DESCRIPTION("T10 DIF CRC calculation");
MODULE_LICENSE("GPL");
MODULE_SOFTDEP("pre: crct10dif");
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