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opnsense-src/sys/dev/cxgbe/tom/t4_tls.c
John Baldwin 6e26b4f8f4 cxgbe tom: Remove orphaned function max_imm_tls_space(). 
Reported by:	markj
Fixes:		789f2d4b3f cxgbe tom: Remove support for non-KTLS TLS offload.
Sponsored by:	Chelsio Communications
2021-06-16 11:39:39 -07:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2017-2018 Chelsio Communications, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "opt_inet.h"
#include "opt_kern_tls.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef KERN_TLS
#include <sys/param.h>
#include <sys/ktr.h>
#include <sys/ktls.h>
#include <sys/sglist.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_var.h>
#include <netinet/toecore.h>
#include <opencrypto/cryptodev.h>
#include <opencrypto/xform.h>
#ifdef TCP_OFFLOAD
#include "common/common.h"
#include "common/t4_tcb.h"
#include "crypto/t4_crypto.h"
#include "tom/t4_tom_l2t.h"
#include "tom/t4_tom.h"
/*
* The TCP sequence number of a CPL_TLS_DATA mbuf is saved here while
* the mbuf is in the ulp_pdu_reclaimq.
*/
#define tls_tcp_seq PH_loc.thirtytwo[0]
static void
t4_set_tls_tcb_field(struct toepcb *toep, uint16_t word, uint64_t mask,
uint64_t val)
{
struct adapter *sc = td_adapter(toep->td);
t4_set_tcb_field(sc, &toep->ofld_txq->wrq, toep, word, mask, val, 0, 0);
}
/* TLS and DTLS common routines */
bool
can_tls_offload(struct adapter *sc)
{
return (sc->tt.tls && sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS);
}
int
tls_tx_key(struct toepcb *toep)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
return (tls_ofld->tx_key_addr >= 0);
}
/* Set TLS Key-Id in TCB */
static void
t4_set_tls_keyid(struct toepcb *toep, unsigned int key_id)
{
t4_set_tls_tcb_field(toep, W_TCB_RX_TLS_KEY_TAG,
V_TCB_RX_TLS_KEY_TAG(M_TCB_RX_TLS_BUF_TAG),
V_TCB_RX_TLS_KEY_TAG(key_id));
}
/* Clear TF_RX_QUIESCE to re-enable receive. */
static void
t4_clear_rx_quiesce(struct toepcb *toep)
{
t4_set_tls_tcb_field(toep, W_TCB_T_FLAGS, V_TF_RX_QUIESCE(1), 0);
}
static void
tls_clr_ofld_mode(struct toepcb *toep)
{
tls_stop_handshake_timer(toep);
KASSERT(toep->tls.rx_key_addr == -1,
("%s: tid %d has RX key", __func__, toep->tid));
/* Switch to plain TOE mode. */
t4_set_tls_tcb_field(toep, W_TCB_ULP_RAW,
V_TCB_ULP_RAW(V_TF_TLS_ENABLE(1)),
V_TCB_ULP_RAW(V_TF_TLS_ENABLE(0)));
t4_set_tls_tcb_field(toep, W_TCB_ULP_TYPE,
V_TCB_ULP_TYPE(M_TCB_ULP_TYPE), V_TCB_ULP_TYPE(ULP_MODE_NONE));
t4_clear_rx_quiesce(toep);
toep->flags &= ~(TPF_FORCE_CREDITS | TPF_TLS_ESTABLISHED);
toep->params.ulp_mode = ULP_MODE_NONE;
}
/* TLS/DTLS content type for CPL SFO */
static inline unsigned char
tls_content_type(unsigned char content_type)
{
/*
* XXX: Shouldn't this map CONTENT_TYPE_APP_DATA to DATA and
* default to "CUSTOM" for all other types including
* heartbeat?
*/
switch (content_type) {
case CONTENT_TYPE_CCS:
return CPL_TX_TLS_SFO_TYPE_CCS;
case CONTENT_TYPE_ALERT:
return CPL_TX_TLS_SFO_TYPE_ALERT;
case CONTENT_TYPE_HANDSHAKE:
return CPL_TX_TLS_SFO_TYPE_HANDSHAKE;
case CONTENT_TYPE_HEARTBEAT:
return CPL_TX_TLS_SFO_TYPE_HEARTBEAT;
}
return CPL_TX_TLS_SFO_TYPE_DATA;
}
/* TLS Key memory management */
static void
clear_tls_keyid(struct toepcb *toep)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
struct adapter *sc = td_adapter(toep->td);
if (tls_ofld->rx_key_addr >= 0) {
t4_free_tls_keyid(sc, tls_ofld->rx_key_addr);
tls_ofld->rx_key_addr = -1;
}
if (tls_ofld->tx_key_addr >= 0) {
t4_free_tls_keyid(sc, tls_ofld->tx_key_addr);
tls_ofld->tx_key_addr = -1;
}
}
static int
get_tp_plen_max(struct ktls_session *tls)
{
int plen = ((min(3*4096, TP_TX_PG_SZ))/1448) * 1448;
return (tls->params.max_frame_len <= 8192 ? plen : FC_TP_PLEN_MAX);
}
/* Send request to get the key-id */
static int
tls_program_key_id(struct toepcb *toep, struct ktls_session *tls,
int direction)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
struct adapter *sc = td_adapter(toep->td);
struct ofld_tx_sdesc *txsd;
int keyid;
struct wrqe *wr;
struct tls_key_req *kwr;
struct tls_keyctx *kctx;
#ifdef INVARIANTS
int kwrlen, kctxlen, len;
kwrlen = sizeof(*kwr);
kctxlen = roundup2(sizeof(*kctx), 32);
len = roundup2(kwrlen + kctxlen, 16);
MPASS(TLS_KEY_WR_SZ == len);
#endif
if (toep->txsd_avail == 0)
return (EAGAIN);
if ((keyid = t4_alloc_tls_keyid(sc)) < 0) {
return (ENOSPC);
}
wr = alloc_wrqe(TLS_KEY_WR_SZ, &toep->ofld_txq->wrq);
if (wr == NULL) {
t4_free_tls_keyid(sc, keyid);
return (ENOMEM);
}
kwr = wrtod(wr);
memset(kwr, 0, TLS_KEY_WR_SZ);
t4_write_tlskey_wr(tls, direction, toep->tid, F_FW_WR_COMPL, keyid,
kwr);
kctx = (struct tls_keyctx *)(kwr + 1);
if (direction == KTLS_TX)
tls_ofld->tx_key_addr = keyid;
else
tls_ofld->rx_key_addr = keyid;
t4_tls_key_ctx(tls, direction, kctx);
txsd = &toep->txsd[toep->txsd_pidx];
txsd->tx_credits = DIV_ROUND_UP(TLS_KEY_WR_SZ, 16);
txsd->plen = 0;
toep->tx_credits -= txsd->tx_credits;
if (__predict_false(++toep->txsd_pidx == toep->txsd_total))
toep->txsd_pidx = 0;
toep->txsd_avail--;
t4_wrq_tx(sc, wr);
return (0);
}
/*
* In some cases a client connection can hang without sending the
* ServerHelloDone message from the NIC to the host. Send a dummy
* RX_DATA_ACK with RX_MODULATE to unstick the connection.
*/
static void
tls_send_handshake_ack(void *arg)
{
struct toepcb *toep = arg;
struct tls_ofld_info *tls_ofld = &toep->tls;
struct adapter *sc = td_adapter(toep->td);
/* Bail without rescheduling if the connection has closed. */
if ((toep->flags & (TPF_FIN_SENT | TPF_ABORT_SHUTDOWN)) != 0)
return;
/*
* If this connection has timed out without receiving more
* data, downgrade to plain TOE mode and don't re-arm the
* timer.
*/
if (sc->tt.tls_rx_timeout != 0) {
struct inpcb *inp;
struct tcpcb *tp;
inp = toep->inp;
tp = intotcpcb(inp);
if ((ticks - tp->t_rcvtime) >= sc->tt.tls_rx_timeout) {
CTR2(KTR_CXGBE, "%s: tid %d clr_ofld_mode", __func__,
toep->tid);
tls_clr_ofld_mode(toep);
return;
}
}
/*
* XXX: Does not have the t4_get_tcb() checks to refine the
* workaround.
*/
callout_schedule(&tls_ofld->handshake_timer, TLS_SRV_HELLO_RD_TM * hz);
CTR2(KTR_CXGBE, "%s: tid %d sending RX_DATA_ACK", __func__, toep->tid);
send_rx_modulate(sc, toep);
}
static void
tls_start_handshake_timer(struct toepcb *toep)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
INP_WLOCK_ASSERT(toep->inp);
callout_reset(&tls_ofld->handshake_timer, TLS_SRV_HELLO_BKOFF_TM * hz,
tls_send_handshake_ack, toep);
}
void
tls_stop_handshake_timer(struct toepcb *toep)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
INP_WLOCK_ASSERT(toep->inp);
callout_stop(&tls_ofld->handshake_timer);
}
int
tls_alloc_ktls(struct toepcb *toep, struct ktls_session *tls, int direction)
{
struct adapter *sc = td_adapter(toep->td);
int error, explicit_iv_size, key_offset, mac_first;
if (!can_tls_offload(td_adapter(toep->td)))
return (EINVAL);
switch (ulp_mode(toep)) {
case ULP_MODE_TLS:
break;
case ULP_MODE_NONE:
case ULP_MODE_TCPDDP:
if (direction != KTLS_TX)
return (EINVAL);
break;
default:
return (EINVAL);
}
switch (tls->params.cipher_algorithm) {
case CRYPTO_AES_CBC:
/* XXX: Explicitly ignore any provided IV. */
switch (tls->params.cipher_key_len) {
case 128 / 8:
case 192 / 8:
case 256 / 8:
break;
default:
error = EINVAL;
goto clr_ofld;
}
switch (tls->params.auth_algorithm) {
case CRYPTO_SHA1_HMAC:
case CRYPTO_SHA2_256_HMAC:
case CRYPTO_SHA2_384_HMAC:
break;
default:
error = EPROTONOSUPPORT;
goto clr_ofld;
}
explicit_iv_size = AES_BLOCK_LEN;
mac_first = 1;
break;
case CRYPTO_AES_NIST_GCM_16:
if (tls->params.iv_len != SALT_SIZE) {
error = EINVAL;
goto clr_ofld;
}
switch (tls->params.cipher_key_len) {
case 128 / 8:
case 192 / 8:
case 256 / 8:
break;
default:
error = EINVAL;
goto clr_ofld;
}
explicit_iv_size = 8;
mac_first = 0;
break;
default:
error = EPROTONOSUPPORT;
goto clr_ofld;
}
/* Only TLS 1.1 and TLS 1.2 are currently supported. */
if (tls->params.tls_vmajor != TLS_MAJOR_VER_ONE ||
tls->params.tls_vminor < TLS_MINOR_VER_ONE ||
tls->params.tls_vminor > TLS_MINOR_VER_TWO) {
error = EPROTONOSUPPORT;
goto clr_ofld;
}
/* Bail if we already have a key. */
if (direction == KTLS_TX) {
if (toep->tls.tx_key_addr != -1)
return (EOPNOTSUPP);
} else {
if (toep->tls.rx_key_addr != -1)
return (EOPNOTSUPP);
}
error = tls_program_key_id(toep, tls, direction);
if (error) {
if (direction == KTLS_RX)
goto clr_ofld;
return (error);
}
if (direction == KTLS_TX) {
toep->tls.scmd0.seqno_numivs =
(V_SCMD_SEQ_NO_CTRL(3) |
V_SCMD_PROTO_VERSION(t4_tls_proto_ver(tls)) |
V_SCMD_ENC_DEC_CTRL(SCMD_ENCDECCTRL_ENCRYPT) |
V_SCMD_CIPH_AUTH_SEQ_CTRL((mac_first == 0)) |
V_SCMD_CIPH_MODE(t4_tls_cipher_mode(tls)) |
V_SCMD_AUTH_MODE(t4_tls_auth_mode(tls)) |
V_SCMD_HMAC_CTRL(t4_tls_hmac_ctrl(tls)) |
V_SCMD_IV_SIZE(explicit_iv_size / 2));
toep->tls.scmd0.ivgen_hdrlen =
(V_SCMD_IV_GEN_CTRL(1) |
V_SCMD_KEY_CTX_INLINE(0) |
V_SCMD_TLS_FRAG_ENABLE(1));
if (tls->params.cipher_algorithm == CRYPTO_AES_NIST_GCM_16)
toep->tls.iv_len = 8;
else
toep->tls.iv_len = AES_BLOCK_LEN;
toep->tls.frag_size = tls->params.max_frame_len;
toep->tls.fcplenmax = get_tp_plen_max(tls);
toep->tls.expn_per_ulp = tls->params.tls_hlen +
tls->params.tls_tlen;
toep->tls.pdus_per_ulp = 1;
toep->tls.adjusted_plen = toep->tls.expn_per_ulp +
tls->params.max_frame_len;
toep->tls.tx_key_info_size = t4_tls_key_info_size(tls);
} else {
/* Stop timer on handshake completion */
tls_stop_handshake_timer(toep);
toep->flags &= ~TPF_FORCE_CREDITS;
toep->flags |= TPF_TLS_RECEIVE;
toep->tls.rx_version = tls->params.tls_vmajor << 8 |
tls->params.tls_vminor;
/*
* RX key tags are an index into the key portion of MA
* memory stored as an offset from the base address in
* units of 64 bytes.
*/
key_offset = toep->tls.rx_key_addr - sc->vres.key.start;
t4_set_tls_keyid(toep, key_offset / 64);
t4_set_tls_tcb_field(toep, W_TCB_ULP_RAW,
V_TCB_ULP_RAW(M_TCB_ULP_RAW),
V_TCB_ULP_RAW((V_TF_TLS_KEY_SIZE(3) |
V_TF_TLS_CONTROL(1) |
V_TF_TLS_ACTIVE(1) |
V_TF_TLS_ENABLE(1))));
t4_set_tls_tcb_field(toep, W_TCB_TLS_SEQ,
V_TCB_TLS_SEQ(M_TCB_TLS_SEQ),
V_TCB_TLS_SEQ(0));
t4_clear_rx_quiesce(toep);
}
return (0);
clr_ofld:
if (ulp_mode(toep) == ULP_MODE_TLS) {
CTR2(KTR_CXGBE, "%s: tid %d clr_ofld_mode", __func__,
toep->tid);
tls_clr_ofld_mode(toep);
}
return (error);
}
void
tls_init_toep(struct toepcb *toep)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
tls_ofld->rx_key_addr = -1;
tls_ofld->tx_key_addr = -1;
}
void
tls_establish(struct toepcb *toep)
{
/*
* Enable PDU extraction.
*
* XXX: Supposedly this should be done by the firmware when
* the ULP_MODE FLOWC parameter is set in send_flowc_wr(), but
* in practice this seems to be required.
*/
CTR2(KTR_CXGBE, "%s: tid %d setting TLS_ENABLE", __func__, toep->tid);
t4_set_tls_tcb_field(toep, W_TCB_ULP_RAW, V_TCB_ULP_RAW(M_TCB_ULP_RAW),
V_TCB_ULP_RAW(V_TF_TLS_ENABLE(1)));
toep->flags |= TPF_FORCE_CREDITS | TPF_TLS_ESTABLISHED;
callout_init_rw(&toep->tls.handshake_timer, &toep->inp->inp_lock, 0);
tls_start_handshake_timer(toep);
}
void
tls_detach(struct toepcb *toep)
{
if (toep->flags & TPF_TLS_ESTABLISHED) {
tls_stop_handshake_timer(toep);
toep->flags &= ~TPF_TLS_ESTABLISHED;
}
}
void
tls_uninit_toep(struct toepcb *toep)
{
MPASS((toep->flags & TPF_TLS_ESTABLISHED) == 0);
clear_tls_keyid(toep);
}
#define MAX_OFLD_TX_CREDITS (SGE_MAX_WR_LEN / 16)
#define MIN_OFLD_TLSTX_CREDITS(toep) \
(howmany(sizeof(struct fw_tlstx_data_wr) + \
sizeof(struct cpl_tx_tls_sfo) + sizeof(struct ulptx_idata) + \
sizeof(struct ulptx_sc_memrd) + \
AES_BLOCK_LEN + 1, 16))
static void
write_tlstx_wr(struct fw_tlstx_data_wr *txwr, struct toepcb *toep,
unsigned int immdlen, unsigned int plen, unsigned int expn,
unsigned int pdus, uint8_t credits, int shove, int imm_ivs)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
unsigned int len = plen + expn;
txwr->op_to_immdlen = htobe32(V_WR_OP(FW_TLSTX_DATA_WR) |
V_FW_TLSTX_DATA_WR_COMPL(1) |
V_FW_TLSTX_DATA_WR_IMMDLEN(immdlen));
txwr->flowid_len16 = htobe32(V_FW_TLSTX_DATA_WR_FLOWID(toep->tid) |
V_FW_TLSTX_DATA_WR_LEN16(credits));
txwr->plen = htobe32(len);
txwr->lsodisable_to_flags = htobe32(V_TX_ULP_MODE(ULP_MODE_TLS) |
V_TX_URG(0) | /* F_T6_TX_FORCE | */ V_TX_SHOVE(shove));
txwr->ctxloc_to_exp = htobe32(V_FW_TLSTX_DATA_WR_NUMIVS(pdus) |
V_FW_TLSTX_DATA_WR_EXP(expn) |
V_FW_TLSTX_DATA_WR_CTXLOC(TLS_SFO_WR_CONTEXTLOC_DDR) |
V_FW_TLSTX_DATA_WR_IVDSGL(!imm_ivs) |
V_FW_TLSTX_DATA_WR_KEYSIZE(tls_ofld->tx_key_info_size >> 4));
txwr->mfs = htobe16(tls_ofld->frag_size);
txwr->adjustedplen_pkd = htobe16(
V_FW_TLSTX_DATA_WR_ADJUSTEDPLEN(tls_ofld->adjusted_plen));
txwr->expinplenmax_pkd = htobe16(
V_FW_TLSTX_DATA_WR_EXPINPLENMAX(tls_ofld->expn_per_ulp));
txwr->pdusinplenmax_pkd =
V_FW_TLSTX_DATA_WR_PDUSINPLENMAX(tls_ofld->pdus_per_ulp);
}
static void
write_tlstx_cpl(struct cpl_tx_tls_sfo *cpl, struct toepcb *toep,
struct tls_hdr *tls_hdr, unsigned int plen, unsigned int pdus)
{
struct tls_ofld_info *tls_ofld = &toep->tls;
int data_type, seglen;
if (plen < tls_ofld->frag_size)
seglen = plen;
else
seglen = tls_ofld->frag_size;
data_type = tls_content_type(tls_hdr->type);
cpl->op_to_seg_len = htobe32(V_CPL_TX_TLS_SFO_OPCODE(CPL_TX_TLS_SFO) |
V_CPL_TX_TLS_SFO_DATA_TYPE(data_type) |
V_CPL_TX_TLS_SFO_CPL_LEN(2) | V_CPL_TX_TLS_SFO_SEG_LEN(seglen));
cpl->pld_len = htobe32(plen);
if (data_type == CPL_TX_TLS_SFO_TYPE_HEARTBEAT)
cpl->type_protover = htobe32(
V_CPL_TX_TLS_SFO_TYPE(tls_hdr->type));
cpl->seqno_numivs = htobe32(tls_ofld->scmd0.seqno_numivs |
V_SCMD_NUM_IVS(pdus));
cpl->ivgen_hdrlen = htobe32(tls_ofld->scmd0.ivgen_hdrlen);
cpl->scmd1 = htobe64(tls_ofld->tx_seq_no);
tls_ofld->tx_seq_no += pdus;
}
static int
count_ext_pgs_segs(struct mbuf *m)
{
vm_paddr_t nextpa;
u_int i, nsegs;
MPASS(m->m_epg_npgs > 0);
nsegs = 1;
nextpa = m->m_epg_pa[0] + PAGE_SIZE;
for (i = 1; i < m->m_epg_npgs; i++) {
if (nextpa != m->m_epg_pa[i])
nsegs++;
nextpa = m->m_epg_pa[i] + PAGE_SIZE;
}
return (nsegs);
}
static void
write_ktlstx_sgl(void *dst, struct mbuf *m, int nsegs)
{
struct ulptx_sgl *usgl = dst;
vm_paddr_t pa;
uint32_t len;
int i, j;
KASSERT(nsegs > 0, ("%s: nsegs 0", __func__));
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
V_ULPTX_NSGE(nsegs));
/* Figure out the first S/G length. */
pa = m->m_epg_pa[0] + m->m_epg_1st_off;
usgl->addr0 = htobe64(pa);
len = m_epg_pagelen(m, 0, m->m_epg_1st_off);
pa += len;
for (i = 1; i < m->m_epg_npgs; i++) {
if (m->m_epg_pa[i] != pa)
break;
len += m_epg_pagelen(m, i, 0);
pa += m_epg_pagelen(m, i, 0);
}
usgl->len0 = htobe32(len);
#ifdef INVARIANTS
nsegs--;
#endif
j = -1;
for (; i < m->m_epg_npgs; i++) {
if (j == -1 || m->m_epg_pa[i] != pa) {
if (j >= 0)
usgl->sge[j / 2].len[j & 1] = htobe32(len);
j++;
#ifdef INVARIANTS
nsegs--;
#endif
pa = m->m_epg_pa[i];
usgl->sge[j / 2].addr[j & 1] = htobe64(pa);
len = m_epg_pagelen(m, i, 0);
pa += len;
} else {
len += m_epg_pagelen(m, i, 0);
pa += m_epg_pagelen(m, i, 0);
}
}
if (j >= 0) {
usgl->sge[j / 2].len[j & 1] = htobe32(len);
if ((j & 1) == 0)
usgl->sge[j / 2].len[1] = htobe32(0);
}
KASSERT(nsegs == 0, ("%s: nsegs %d, m %p", __func__, nsegs, m));
}
/*
* Similar to t4_push_frames() but handles sockets that contain TLS
* record mbufs.
*/
void
t4_push_ktls(struct adapter *sc, struct toepcb *toep, int drop)
{
struct tls_hdr *thdr;
struct fw_tlstx_data_wr *txwr;
struct cpl_tx_tls_sfo *cpl;
struct ulptx_idata *idata;
struct ulptx_sc_memrd *memrd;
struct wrqe *wr;
struct mbuf *m;
u_int nsegs, credits, wr_len;
u_int expn_size;
struct inpcb *inp = toep->inp;
struct tcpcb *tp = intotcpcb(inp);
struct socket *so = inp->inp_socket;
struct sockbuf *sb = &so->so_snd;
int tls_size, tx_credits, shove, sowwakeup;
struct ofld_tx_sdesc *txsd;
char *buf;
INP_WLOCK_ASSERT(inp);
KASSERT(toep->flags & TPF_FLOWC_WR_SENT,
("%s: flowc_wr not sent for tid %u.", __func__, toep->tid));
KASSERT(ulp_mode(toep) == ULP_MODE_NONE ||
ulp_mode(toep) == ULP_MODE_TCPDDP || ulp_mode(toep) == ULP_MODE_TLS,
("%s: ulp_mode %u for toep %p", __func__, ulp_mode(toep), toep));
KASSERT(tls_tx_key(toep),
("%s: TX key not set for toep %p", __func__, toep));
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %d toep flags %#x tp flags %#x drop %d",
__func__, toep->tid, toep->flags, tp->t_flags);
#endif
if (__predict_false(toep->flags & TPF_ABORT_SHUTDOWN))
return;
#ifdef RATELIMIT
if (__predict_false(inp->inp_flags2 & INP_RATE_LIMIT_CHANGED) &&
(update_tx_rate_limit(sc, toep, so->so_max_pacing_rate) == 0)) {
inp->inp_flags2 &= ~INP_RATE_LIMIT_CHANGED;
}
#endif
/*
* This function doesn't resume by itself. Someone else must clear the
* flag and call this function.
*/
if (__predict_false(toep->flags & TPF_TX_SUSPENDED)) {
KASSERT(drop == 0,
("%s: drop (%d) != 0 but tx is suspended", __func__, drop));
return;
}
txsd = &toep->txsd[toep->txsd_pidx];
for (;;) {
tx_credits = min(toep->tx_credits, MAX_OFLD_TX_CREDITS);
SOCKBUF_LOCK(sb);
sowwakeup = drop;
if (drop) {
sbdrop_locked(sb, drop);
drop = 0;
}
m = sb->sb_sndptr != NULL ? sb->sb_sndptr->m_next : sb->sb_mb;
/*
* Send a FIN if requested, but only if there's no
* more data to send.
*/
if (m == NULL && toep->flags & TPF_SEND_FIN) {
if (sowwakeup)
sowwakeup_locked(so);
else
SOCKBUF_UNLOCK(sb);
SOCKBUF_UNLOCK_ASSERT(sb);
t4_close_conn(sc, toep);
return;
}
/*
* If there is no ready data to send, wait until more
* data arrives.
*/
if (m == NULL || (m->m_flags & M_NOTAVAIL) != 0) {
if (sowwakeup)
sowwakeup_locked(so);
else
SOCKBUF_UNLOCK(sb);
SOCKBUF_UNLOCK_ASSERT(sb);
#ifdef VERBOSE_TRACES
CTR2(KTR_CXGBE, "%s: tid %d no ready data to send",
__func__, toep->tid);
#endif
return;
}
KASSERT(m->m_flags & M_EXTPG, ("%s: mbuf %p is not NOMAP",
__func__, m));
KASSERT(m->m_epg_tls != NULL,
("%s: mbuf %p doesn't have TLS session", __func__, m));
/* Calculate WR length. */
wr_len = sizeof(struct fw_tlstx_data_wr) +
sizeof(struct cpl_tx_tls_sfo) +
sizeof(struct ulptx_idata) + sizeof(struct ulptx_sc_memrd);
/* Explicit IVs for AES-CBC and AES-GCM are <= 16. */
MPASS(toep->tls.iv_len <= AES_BLOCK_LEN);
wr_len += AES_BLOCK_LEN;
/* Account for SGL in work request length. */
nsegs = count_ext_pgs_segs(m);
wr_len += sizeof(struct ulptx_sgl) +
((3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1)) * 8;
/* Not enough credits for this work request. */
if (howmany(wr_len, 16) > tx_credits) {
if (sowwakeup)
sowwakeup_locked(so);
else
SOCKBUF_UNLOCK(sb);
SOCKBUF_UNLOCK_ASSERT(sb);
#ifdef VERBOSE_TRACES
CTR5(KTR_CXGBE,
"%s: tid %d mbuf %p requires %d credits, but only %d available",
__func__, toep->tid, m, howmany(wr_len, 16),
tx_credits);
#endif
toep->flags |= TPF_TX_SUSPENDED;
return;
}
/* Shove if there is no additional data pending. */
shove = ((m->m_next == NULL ||
(m->m_next->m_flags & M_NOTAVAIL) != 0)) &&
(tp->t_flags & TF_MORETOCOME) == 0;
if (sb->sb_flags & SB_AUTOSIZE &&
V_tcp_do_autosndbuf &&
sb->sb_hiwat < V_tcp_autosndbuf_max &&
sbused(sb) >= sb->sb_hiwat * 7 / 8) {
int newsize = min(sb->sb_hiwat + V_tcp_autosndbuf_inc,
V_tcp_autosndbuf_max);
if (!sbreserve_locked(sb, newsize, so, NULL))
sb->sb_flags &= ~SB_AUTOSIZE;
else
sowwakeup = 1; /* room available */
}
if (sowwakeup)
sowwakeup_locked(so);
else
SOCKBUF_UNLOCK(sb);
SOCKBUF_UNLOCK_ASSERT(sb);
if (__predict_false(toep->flags & TPF_FIN_SENT))
panic("%s: excess tx.", __func__);
wr = alloc_wrqe(roundup2(wr_len, 16), &toep->ofld_txq->wrq);
if (wr == NULL) {
/* XXX: how will we recover from this? */
toep->flags |= TPF_TX_SUSPENDED;
return;
}
thdr = (struct tls_hdr *)&m->m_epg_hdr;
#ifdef VERBOSE_TRACES
CTR5(KTR_CXGBE, "%s: tid %d TLS record %ju type %d len %#x",
__func__, toep->tid, m->m_epg_seqno, thdr->type,
m->m_len);
#endif
txwr = wrtod(wr);
cpl = (struct cpl_tx_tls_sfo *)(txwr + 1);
memset(txwr, 0, roundup2(wr_len, 16));
credits = howmany(wr_len, 16);
expn_size = m->m_epg_hdrlen +
m->m_epg_trllen;
tls_size = m->m_len - expn_size;
write_tlstx_wr(txwr, toep, 0,
tls_size, expn_size, 1, credits, shove, 1);
toep->tls.tx_seq_no = m->m_epg_seqno;
write_tlstx_cpl(cpl, toep, thdr, tls_size, 1);
idata = (struct ulptx_idata *)(cpl + 1);
idata->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_NOOP));
idata->len = htobe32(0);
memrd = (struct ulptx_sc_memrd *)(idata + 1);
memrd->cmd_to_len = htobe32(V_ULPTX_CMD(ULP_TX_SC_MEMRD) |
V_ULP_TX_SC_MORE(1) |
V_ULPTX_LEN16(toep->tls.tx_key_info_size >> 4));
memrd->addr = htobe32(toep->tls.tx_key_addr >> 5);
/* Copy IV. */
buf = (char *)(memrd + 1);
memcpy(buf, thdr + 1, toep->tls.iv_len);
buf += AES_BLOCK_LEN;
write_ktlstx_sgl(buf, m, nsegs);
KASSERT(toep->tx_credits >= credits,
("%s: not enough credits", __func__));
toep->tx_credits -= credits;
tp->snd_nxt += m->m_len;
tp->snd_max += m->m_len;
SOCKBUF_LOCK(sb);
sb->sb_sndptr = m;
SOCKBUF_UNLOCK(sb);
toep->flags |= TPF_TX_DATA_SENT;
if (toep->tx_credits < MIN_OFLD_TLSTX_CREDITS(toep))
toep->flags |= TPF_TX_SUSPENDED;
KASSERT(toep->txsd_avail > 0, ("%s: no txsd", __func__));
txsd->plen = m->m_len;
txsd->tx_credits = credits;
txsd++;
if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) {
toep->txsd_pidx = 0;
txsd = &toep->txsd[0];
}
toep->txsd_avail--;
counter_u64_add(toep->ofld_txq->tx_toe_tls_records, 1);
counter_u64_add(toep->ofld_txq->tx_toe_tls_octets, m->m_len);
t4_l2t_send(sc, wr, toep->l2te);
}
}
/*
* For TLS data we place received mbufs received via CPL_TLS_DATA into
* an mbufq in the TLS offload state. When CPL_RX_TLS_CMP is
* received, the completed PDUs are placed into the socket receive
* buffer.
*
* The TLS code reuses the ulp_pdu_reclaimq to hold the pending mbufs.
*/
static int
do_tls_data(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_tls_data *cpl = mtod(m, const void *);
unsigned int tid = GET_TID(cpl);
struct toepcb *toep = lookup_tid(sc, tid);
struct inpcb *inp = toep->inp;
struct tcpcb *tp;
int len;
/* XXX: Should this match do_rx_data instead? */
KASSERT(!(toep->flags & TPF_SYNQE),
("%s: toep %p claims to be a synq entry", __func__, toep));
KASSERT(toep->tid == tid, ("%s: toep tid/atid mismatch", __func__));
/* strip off CPL header */
m_adj(m, sizeof(*cpl));
len = m->m_pkthdr.len;
toep->ofld_rxq->rx_toe_tls_octets += len;
KASSERT(len == G_CPL_TLS_DATA_LENGTH(be32toh(cpl->length_pkd)),
("%s: payload length mismatch", __func__));
INP_WLOCK(inp);
if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) {
CTR4(KTR_CXGBE, "%s: tid %u, rx (%d bytes), inp_flags 0x%x",
__func__, tid, len, inp->inp_flags);
INP_WUNLOCK(inp);
m_freem(m);
return (0);
}
/* Save TCP sequence number. */
m->m_pkthdr.tls_tcp_seq = be32toh(cpl->seq);
if (mbufq_enqueue(&toep->ulp_pdu_reclaimq, m)) {
#ifdef INVARIANTS
panic("Failed to queue TLS data packet");
#else
printf("%s: Failed to queue TLS data packet\n", __func__);
INP_WUNLOCK(inp);
m_freem(m);
return (0);
#endif
}
tp = intotcpcb(inp);
tp->t_rcvtime = ticks;
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %u len %d seq %u", __func__, tid, len,
be32toh(cpl->seq));
#endif
INP_WUNLOCK(inp);
return (0);
}
static int
do_rx_tls_cmp(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_rx_tls_cmp *cpl = mtod(m, const void *);
struct tlsrx_hdr_pkt *tls_hdr_pkt;
unsigned int tid = GET_TID(cpl);
struct toepcb *toep = lookup_tid(sc, tid);
struct inpcb *inp = toep->inp;
struct tcpcb *tp;
struct socket *so;
struct sockbuf *sb;
struct mbuf *tls_data;
struct tls_get_record *tgr;
struct mbuf *control;
int len, pdu_length, rx_credits;
KASSERT(toep->tid == tid, ("%s: toep tid/atid mismatch", __func__));
KASSERT(!(toep->flags & TPF_SYNQE),
("%s: toep %p claims to be a synq entry", __func__, toep));
/* strip off CPL header */
m_adj(m, sizeof(*cpl));
len = m->m_pkthdr.len;
toep->ofld_rxq->rx_toe_tls_records++;
KASSERT(len == G_CPL_RX_TLS_CMP_LENGTH(be32toh(cpl->pdulength_length)),
("%s: payload length mismatch", __func__));
INP_WLOCK(inp);
if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT)) {
CTR4(KTR_CXGBE, "%s: tid %u, rx (%d bytes), inp_flags 0x%x",
__func__, tid, len, inp->inp_flags);
INP_WUNLOCK(inp);
m_freem(m);
return (0);
}
pdu_length = G_CPL_RX_TLS_CMP_PDULENGTH(be32toh(cpl->pdulength_length));
so = inp_inpcbtosocket(inp);
tp = intotcpcb(inp);
#ifdef VERBOSE_TRACES
CTR6(KTR_CXGBE, "%s: tid %u PDU len %d len %d seq %u, rcv_nxt %u",
__func__, tid, pdu_length, len, be32toh(cpl->seq), tp->rcv_nxt);
#endif
tp->rcv_nxt += pdu_length;
KASSERT(tp->rcv_wnd >= pdu_length,
("%s: negative window size", __func__));
tp->rcv_wnd -= pdu_length;
/* XXX: Not sure what to do about urgent data. */
/*
* The payload of this CPL is the TLS header followed by
* additional fields.
*/
KASSERT(m->m_len >= sizeof(*tls_hdr_pkt),
("%s: payload too small", __func__));
tls_hdr_pkt = mtod(m, void *);
tls_data = mbufq_dequeue(&toep->ulp_pdu_reclaimq);
if (tls_data != NULL) {
KASSERT(be32toh(cpl->seq) == tls_data->m_pkthdr.tls_tcp_seq,
("%s: sequence mismatch", __func__));
}
/* Report decryption errors as EBADMSG. */
if ((tls_hdr_pkt->res_to_mac_error & M_TLSRX_HDR_PKT_ERROR) != 0) {
m_freem(m);
m_freem(tls_data);
CURVNET_SET(toep->vnet);
so->so_error = EBADMSG;
sorwakeup(so);
INP_WUNLOCK(inp);
CURVNET_RESTORE();
return (0);
}
/* Allocate the control message mbuf. */
control = sbcreatecontrol(NULL, sizeof(*tgr), TLS_GET_RECORD,
IPPROTO_TCP);
if (control == NULL) {
m_freem(m);
m_freem(tls_data);
CURVNET_SET(toep->vnet);
so->so_error = ENOBUFS;
sorwakeup(so);
INP_WUNLOCK(inp);
CURVNET_RESTORE();
return (0);
}
tgr = (struct tls_get_record *)
CMSG_DATA(mtod(control, struct cmsghdr *));
tgr->tls_type = tls_hdr_pkt->type;
tgr->tls_vmajor = be16toh(tls_hdr_pkt->version) >> 8;
tgr->tls_vminor = be16toh(tls_hdr_pkt->version) & 0xff;
m_freem(m);
if (tls_data != NULL) {
m_last(tls_data)->m_flags |= M_EOR;
tgr->tls_length = htobe16(tls_data->m_pkthdr.len);
} else
tgr->tls_length = 0;
m = tls_data;
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
if (__predict_false(sb->sb_state & SBS_CANTRCVMORE)) {
struct epoch_tracker et;
CTR3(KTR_CXGBE, "%s: tid %u, excess rx (%d bytes)",
__func__, tid, pdu_length);
m_freem(m);
m_freem(control);
SOCKBUF_UNLOCK(sb);
INP_WUNLOCK(inp);
CURVNET_SET(toep->vnet);
NET_EPOCH_ENTER(et);
INP_WLOCK(inp);
tp = tcp_drop(tp, ECONNRESET);
if (tp)
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (0);
}
/*
* Not all of the bytes on the wire are included in the socket buffer
* (e.g. the MAC of the TLS record). However, those bytes are included
* in the TCP sequence space.
*/
/* receive buffer autosize */
MPASS(toep->vnet == so->so_vnet);
CURVNET_SET(toep->vnet);
if (sb->sb_flags & SB_AUTOSIZE &&
V_tcp_do_autorcvbuf &&
sb->sb_hiwat < V_tcp_autorcvbuf_max &&
m->m_pkthdr.len > (sbspace(sb) / 8 * 7)) {
unsigned int hiwat = sb->sb_hiwat;
unsigned int newsize = min(hiwat + sc->tt.autorcvbuf_inc,
V_tcp_autorcvbuf_max);
if (!sbreserve_locked(sb, newsize, so, NULL))
sb->sb_flags &= ~SB_AUTOSIZE;
}
sbappendcontrol_locked(sb, m, control, 0);
rx_credits = sbspace(sb) > tp->rcv_wnd ? sbspace(sb) - tp->rcv_wnd : 0;
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %u rx_credits %u rcv_wnd %u",
__func__, tid, rx_credits, tp->rcv_wnd);
#endif
if (rx_credits > 0 && sbused(sb) + tp->rcv_wnd < sb->sb_lowat) {
rx_credits = send_rx_credits(sc, toep, rx_credits);
tp->rcv_wnd += rx_credits;
tp->rcv_adv += rx_credits;
}
sorwakeup_locked(so);
SOCKBUF_UNLOCK_ASSERT(sb);
INP_WUNLOCK(inp);
CURVNET_RESTORE();
return (0);
}
void
do_rx_data_tls(const struct cpl_rx_data *cpl, struct toepcb *toep,
struct mbuf *m)
{
struct inpcb *inp = toep->inp;
struct tls_ofld_info *tls_ofld = &toep->tls;
struct tls_hdr *hdr;
struct tcpcb *tp;
struct socket *so;
struct sockbuf *sb;
int len, rx_credits;
len = m->m_pkthdr.len;
INP_WLOCK_ASSERT(inp);
so = inp_inpcbtosocket(inp);
tp = intotcpcb(inp);
sb = &so->so_rcv;
SOCKBUF_LOCK(sb);
CURVNET_SET(toep->vnet);
tp->rcv_nxt += len;
KASSERT(tp->rcv_wnd >= len, ("%s: negative window size", __func__));
tp->rcv_wnd -= len;
/* Do we have a full TLS header? */
if (len < sizeof(*hdr)) {
CTR3(KTR_CXGBE, "%s: tid %u len %d: too short for a TLS header",
__func__, toep->tid, len);
so->so_error = EMSGSIZE;
goto out;
}
hdr = mtod(m, struct tls_hdr *);
/* Is the header valid? */
if (be16toh(hdr->version) != tls_ofld->rx_version) {
CTR3(KTR_CXGBE, "%s: tid %u invalid version %04x",
__func__, toep->tid, be16toh(hdr->version));
so->so_error = EINVAL;
goto out;
}
if (be16toh(hdr->length) < sizeof(*hdr)) {
CTR3(KTR_CXGBE, "%s: tid %u invalid length %u",
__func__, toep->tid, be16toh(hdr->length));
so->so_error = EBADMSG;
goto out;
}
/* Did we get a truncated record? */
if (len < be16toh(hdr->length)) {
CTR4(KTR_CXGBE, "%s: tid %u truncated TLS record (%d vs %u)",
__func__, toep->tid, len, be16toh(hdr->length));
so->so_error = EMSGSIZE;
goto out;
}
/* Is the header type unknown? */
switch (hdr->type) {
case CONTENT_TYPE_CCS:
case CONTENT_TYPE_ALERT:
case CONTENT_TYPE_APP_DATA:
case CONTENT_TYPE_HANDSHAKE:
break;
default:
CTR3(KTR_CXGBE, "%s: tid %u invalid TLS record type %u",
__func__, toep->tid, hdr->type);
so->so_error = EBADMSG;
goto out;
}
/*
* Just punt. Although this could fall back to software
* decryption, this case should never really happen.
*/
CTR4(KTR_CXGBE, "%s: tid %u dropping TLS record type %u, length %u",
__func__, toep->tid, hdr->type, be16toh(hdr->length));
so->so_error = EBADMSG;
out:
/*
* This connection is going to die anyway, so probably don't
* need to bother with returning credits.
*/
rx_credits = sbspace(sb) > tp->rcv_wnd ? sbspace(sb) - tp->rcv_wnd : 0;
#ifdef VERBOSE_TRACES
CTR4(KTR_CXGBE, "%s: tid %u rx_credits %u rcv_wnd %u",
__func__, toep->tid, rx_credits, tp->rcv_wnd);
#endif
if (rx_credits > 0 && sbused(sb) + tp->rcv_wnd < sb->sb_lowat) {
rx_credits = send_rx_credits(toep->vi->adapter, toep,
rx_credits);
tp->rcv_wnd += rx_credits;
tp->rcv_adv += rx_credits;
}
sorwakeup_locked(so);
SOCKBUF_UNLOCK_ASSERT(sb);
INP_WUNLOCK(inp);
CURVNET_RESTORE();
m_freem(m);
}
void
t4_tls_mod_load(void)
{
t4_register_cpl_handler(CPL_TLS_DATA, do_tls_data);
t4_register_cpl_handler(CPL_RX_TLS_CMP, do_rx_tls_cmp);
}
void
t4_tls_mod_unload(void)
{
t4_register_cpl_handler(CPL_TLS_DATA, NULL);
t4_register_cpl_handler(CPL_RX_TLS_CMP, NULL);
}
#endif /* TCP_OFFLOAD */
#endif /* KERN_TLS */
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