Revision 3822d0670c9d4342794d73e0d0e615322b40438e authored by Rahul Lakkireddy on 04 June 2021, 11:18:18 UTC, committed by David S. Miller on 04 June 2021, 21:45:13 UTC
When configuring TC-MQPRIO offload, only turn off netdev carrier and don't bring physical link down in hardware. Otherwise, when the physical link is brought up again after configuration, it gets re-trained and stalls ongoing traffic. Also, when firmware is no longer accessible or crashed, avoid sending FLOWC and waiting for reply that will never come. Fix following hung_task_timeout_secs trace seen in these cases. INFO: task tc:20807 blocked for more than 122 seconds. Tainted: G S 5.13.0-rc3+ #122 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:tc state:D stack:14768 pid:20807 ppid: 19366 flags:0x00000000 Call Trace: __schedule+0x27b/0x6a0 schedule+0x37/0xa0 schedule_preempt_disabled+0x5/0x10 __mutex_lock.isra.14+0x2a0/0x4a0 ? netlink_lookup+0x120/0x1a0 ? rtnl_fill_ifinfo+0x10f0/0x10f0 __netlink_dump_start+0x70/0x250 rtnetlink_rcv_msg+0x28b/0x380 ? rtnl_fill_ifinfo+0x10f0/0x10f0 ? rtnl_calcit.isra.42+0x120/0x120 netlink_rcv_skb+0x4b/0xf0 netlink_unicast+0x1a0/0x280 netlink_sendmsg+0x216/0x440 sock_sendmsg+0x56/0x60 __sys_sendto+0xe9/0x150 ? handle_mm_fault+0x6d/0x1b0 ? do_user_addr_fault+0x1c5/0x620 __x64_sys_sendto+0x1f/0x30 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7f73218321 RSP: 002b:00007ffd19626208 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055b7c0a8b240 RCX: 00007f7f73218321 RDX: 0000000000000028 RSI: 00007ffd19626210 RDI: 0000000000000003 RBP: 000055b7c08680ff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000055b7c085f5f6 R13: 000055b7c085f60a R14: 00007ffd19636470 R15: 00007ffd196262a0 Fixes: b1396c2bd675 ("cxgb4: parse and configure TC-MQPRIO offload") Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 944d671
sm3_generic.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
*
* Copyright (C) 2017 ARM Limited or its affiliates.
* Written by Gilad Ben-Yossef <gilad@benyossef.com>
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sm3.h>
#include <crypto/sm3_base.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
};
EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
static inline u32 p0(u32 x)
{
return x ^ rol32(x, 9) ^ rol32(x, 17);
}
static inline u32 p1(u32 x)
{
return x ^ rol32(x, 15) ^ rol32(x, 23);
}
static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
{
return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
}
static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
{
return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
}
static inline u32 t(unsigned int n)
{
return (n < 16) ? SM3_T1 : SM3_T2;
}
static void sm3_expand(u32 *t, u32 *w, u32 *wt)
{
int i;
unsigned int tmp;
/* load the input */
for (i = 0; i <= 15; i++)
w[i] = get_unaligned_be32((__u32 *)t + i);
for (i = 16; i <= 67; i++) {
tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
}
for (i = 0; i <= 63; i++)
wt[i] = w[i] ^ w[i + 4];
}
static void sm3_compress(u32 *w, u32 *wt, u32 *m)
{
u32 ss1;
u32 ss2;
u32 tt1;
u32 tt2;
u32 a, b, c, d, e, f, g, h;
int i;
a = m[0];
b = m[1];
c = m[2];
d = m[3];
e = m[4];
f = m[5];
g = m[6];
h = m[7];
for (i = 0; i <= 63; i++) {
ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i & 31)), 7);
ss2 = ss1 ^ rol32(a, 12);
tt1 = ff(i, a, b, c) + d + ss2 + *wt;
wt++;
tt2 = gg(i, e, f, g) + h + ss1 + *w;
w++;
d = c;
c = rol32(b, 9);
b = a;
a = tt1;
h = g;
g = rol32(f, 19);
f = e;
e = p0(tt2);
}
m[0] = a ^ m[0];
m[1] = b ^ m[1];
m[2] = c ^ m[2];
m[3] = d ^ m[3];
m[4] = e ^ m[4];
m[5] = f ^ m[5];
m[6] = g ^ m[6];
m[7] = h ^ m[7];
a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
}
static void sm3_transform(struct sm3_state *sst, u8 const *src)
{
unsigned int w[68];
unsigned int wt[64];
sm3_expand((u32 *)src, w, wt);
sm3_compress(w, wt, sst->state);
memzero_explicit(w, sizeof(w));
memzero_explicit(wt, sizeof(wt));
}
static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
int blocks)
{
while (blocks--) {
sm3_transform(sst, src);
src += SM3_BLOCK_SIZE;
}
}
int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sm3_update);
int crypto_sm3_final(struct shash_desc *desc, u8 *out)
{
sm3_base_do_finalize(desc, sm3_generic_block_fn);
return sm3_base_finish(desc, out);
}
EXPORT_SYMBOL(crypto_sm3_final);
int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash)
{
sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
return crypto_sm3_final(desc, hash);
}
EXPORT_SYMBOL(crypto_sm3_finup);
static struct shash_alg sm3_alg = {
.digestsize = SM3_DIGEST_SIZE,
.init = sm3_base_init,
.update = crypto_sm3_update,
.final = crypto_sm3_final,
.finup = crypto_sm3_finup,
.descsize = sizeof(struct sm3_state),
.base = {
.cra_name = "sm3",
.cra_driver_name = "sm3-generic",
.cra_blocksize = SM3_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sm3_generic_mod_init(void)
{
return crypto_register_shash(&sm3_alg);
}
static void __exit sm3_generic_mod_fini(void)
{
crypto_unregister_shash(&sm3_alg);
}
subsys_initcall(sm3_generic_mod_init);
module_exit(sm3_generic_mod_fini);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
MODULE_ALIAS_CRYPTO("sm3");
MODULE_ALIAS_CRYPTO("sm3-generic");
Computing file changes ...