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iscsi: Remove icl_soft-only fields from struct icl_conn.

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Create a struct icl_soft_conn which extends struct icl_conn and
move fields only used by icl_soft from struct icl_conn to
struct icl_soft_conn.

Reviewed by:	mav
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D31414
This commit is contained in:
John Baldwin 2021-08-05 12:05:30 -07:00
parent 383dbdb2eb
commit 87322a9075
3 changed files with 128 additions and 121 deletions
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11
sys/dev/cxgbe/cxgbei/icl_cxgbei.c
View File

@ -569,10 +569,6 @@ icl_cxgbei_new_conn(const char *name, struct mtx *lock)
ic = &icc->ic;
ic->ic_lock = lock;
/* XXXNP: review. Most of these icl_conn fields aren't really used */
STAILQ_INIT(&ic->ic_to_send);
cv_init(&ic->ic_send_cv, "icl_cxgbei_tx");
cv_init(&ic->ic_receive_cv, "icl_cxgbei_rx");
#ifdef DIAGNOSTIC
refcount_init(&ic->ic_outstanding_pdus, 0);
#endif
@ -594,9 +590,6 @@ icl_cxgbei_conn_free(struct icl_conn *ic)
CTR2(KTR_CXGBE, "%s: icc %p", __func__, icc);
cv_destroy(&ic->ic_send_cv);
cv_destroy(&ic->ic_receive_cv);
mtx_destroy(&icc->cmp_lock);
hashdestroy(icc->cmp_table, M_CXGBEI, icc->cmp_hash_mask);
kobj_delete((struct kobj *)icc, M_CXGBE);
@ -864,10 +857,6 @@ icl_cxgbei_conn_close(struct icl_conn *ic)
}
ic->ic_disconnecting = true;
/* These are unused in this driver right now. */
MPASS(STAILQ_EMPTY(&ic->ic_to_send));
MPASS(ic->ic_receive_pdu == NULL);
#ifdef DIAGNOSTIC
KASSERT(ic->ic_outstanding_pdus == 0,
("destroying session with %d outstanding PDUs",

20
sys/dev/iscsi/icl.h
View File

@ -82,13 +82,6 @@ struct icl_pdu {
void *ip_prv1;
};
#define ICL_CONN_STATE_INVALID 0
#define ICL_CONN_STATE_BHS 1
#define ICL_CONN_STATE_AHS 2
#define ICL_CONN_STATE_HEADER_DIGEST 3
#define ICL_CONN_STATE_DATA 4
#define ICL_CONN_STATE_DATA_DIGEST 5
#define ICL_NOCOPY (1 << 30)
struct icl_conn {
@ -98,20 +91,11 @@ struct icl_conn {
#ifdef DIAGNOSTIC
volatile u_int ic_outstanding_pdus;
#endif
STAILQ_HEAD(, icl_pdu) ic_to_send;
bool ic_check_send_space;
size_t ic_receive_len;
int ic_receive_state;
struct icl_pdu *ic_receive_pdu;
struct cv ic_send_cv;
struct cv ic_receive_cv;
bool ic_header_crc32c;
bool ic_data_crc32c;
bool ic_send_running;
bool ic_receive_running;
uint32_t ic_max_recv_data_segment_length;
uint32_t ic_max_send_data_segment_length;
size_t ic_maxtags;
bool ic_header_crc32c;
bool ic_data_crc32c;
bool ic_disconnecting;
bool ic_iser;
bool ic_unmapped;

218
sys/dev/iscsi/icl_soft.c
View File

@ -63,6 +63,27 @@ __FBSDID("$FreeBSD$");
#include <dev/iscsi/iscsi_proto.h>
#include <icl_conn_if.h>
#define ICL_CONN_STATE_BHS 1
#define ICL_CONN_STATE_AHS 2
#define ICL_CONN_STATE_HEADER_DIGEST 3
#define ICL_CONN_STATE_DATA 4
#define ICL_CONN_STATE_DATA_DIGEST 5
struct icl_soft_conn {
struct icl_conn ic;
/* soft specific stuff goes here. */
STAILQ_HEAD(, icl_pdu) to_send;
struct cv send_cv;
struct cv receive_cv;
struct icl_pdu *receive_pdu;
size_t receive_len;
int receive_state;
bool receive_running;
bool check_send_space;
bool send_running;
};
struct icl_soft_pdu {
struct icl_pdu ip;
@ -150,7 +171,7 @@ static kobj_method_t icl_soft_methods[] = {
{ 0, 0 }
};
DEFINE_CLASS(icl_soft, icl_soft_methods, sizeof(struct icl_conn));
DEFINE_CLASS(icl_soft, icl_soft_methods, sizeof(struct icl_soft_conn));
static void
icl_conn_fail(struct icl_conn *ic)
@ -441,14 +462,14 @@ static int
icl_pdu_receive_data_segment(struct icl_pdu *request, struct mbuf **r,
size_t *rs, bool *more_neededp)
{
struct icl_conn *ic;
struct icl_soft_conn *isc;
size_t len, padding = 0;
struct mbuf *m;
ic = request->ip_conn;
isc = (struct icl_soft_conn *)request->ip_conn;
*more_neededp = false;
ic->ic_receive_len = 0;
isc->receive_len = 0;
len = icl_pdu_data_segment_length(request);
if (len == 0)
@ -497,8 +518,7 @@ icl_pdu_receive_data_segment(struct icl_pdu *request, struct mbuf **r,
ICL_DEBUG("len 0");
if (*more_neededp)
ic->ic_receive_len =
icl_pdu_data_segment_receive_len(request);
isc->receive_len = icl_pdu_data_segment_receive_len(request);
return (0);
}
@ -537,16 +557,17 @@ icl_pdu_check_data_digest(struct icl_pdu *request, struct mbuf **r, size_t *rs)
* "part" of PDU at a time; call it repeatedly until it returns non-NULL.
*/
static struct icl_pdu *
icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
icl_conn_receive_pdu(struct icl_soft_conn *isc, struct mbuf **r, size_t *rs)
{
struct icl_conn *ic = &isc->ic;
struct icl_pdu *request;
size_t len;
int error = 0;
bool more_needed;
if (ic->ic_receive_state == ICL_CONN_STATE_BHS) {
KASSERT(ic->ic_receive_pdu == NULL,
("ic->ic_receive_pdu != NULL"));
if (isc->receive_state == ICL_CONN_STATE_BHS) {
KASSERT(isc->receive_pdu == NULL,
("isc->receive_pdu != NULL"));
request = icl_soft_conn_new_pdu(ic, M_NOWAIT);
if (request == NULL) {
ICL_DEBUG("failed to allocate PDU; "
@ -554,14 +575,14 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
icl_conn_fail(ic);
return (NULL);
}
ic->ic_receive_pdu = request;
isc->receive_pdu = request;
} else {
KASSERT(ic->ic_receive_pdu != NULL,
("ic->ic_receive_pdu == NULL"));
request = ic->ic_receive_pdu;
KASSERT(isc->receive_pdu != NULL,
("isc->receive_pdu == NULL"));
request = isc->receive_pdu;
}
switch (ic->ic_receive_state) {
switch (isc->receive_state) {
case ICL_CONN_STATE_BHS:
//ICL_DEBUG("receiving BHS");
icl_soft_receive_buf(r, rs, request->ip_bhs,
@ -581,18 +602,18 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
break;
}
ic->ic_receive_state = ICL_CONN_STATE_AHS;
ic->ic_receive_len = icl_pdu_ahs_length(request);
isc->receive_state = ICL_CONN_STATE_AHS;
isc->receive_len = icl_pdu_ahs_length(request);
break;
case ICL_CONN_STATE_AHS:
//ICL_DEBUG("receiving AHS");
icl_pdu_receive_ahs(request, r, rs);
ic->ic_receive_state = ICL_CONN_STATE_HEADER_DIGEST;
isc->receive_state = ICL_CONN_STATE_HEADER_DIGEST;
if (ic->ic_header_crc32c == false)
ic->ic_receive_len = 0;
isc->receive_len = 0;
else
ic->ic_receive_len = ISCSI_HEADER_DIGEST_SIZE;
isc->receive_len = ISCSI_HEADER_DIGEST_SIZE;
break;
case ICL_CONN_STATE_HEADER_DIGEST:
@ -604,9 +625,8 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
break;
}
ic->ic_receive_state = ICL_CONN_STATE_DATA;
ic->ic_receive_len =
icl_pdu_data_segment_receive_len(request);
isc->receive_state = ICL_CONN_STATE_DATA;
isc->receive_len = icl_pdu_data_segment_receive_len(request);
break;
case ICL_CONN_STATE_DATA:
@ -622,11 +642,11 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
if (more_needed)
break;
ic->ic_receive_state = ICL_CONN_STATE_DATA_DIGEST;
isc->receive_state = ICL_CONN_STATE_DATA_DIGEST;
if (request->ip_data_len == 0 || ic->ic_data_crc32c == false)
ic->ic_receive_len = 0;
isc->receive_len = 0;
else
ic->ic_receive_len = ISCSI_DATA_DIGEST_SIZE;
isc->receive_len = ISCSI_DATA_DIGEST_SIZE;
break;
case ICL_CONN_STATE_DATA_DIGEST:
@ -642,18 +662,18 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
* We've received complete PDU; reset the receive state machine
* and return the PDU.
*/
ic->ic_receive_state = ICL_CONN_STATE_BHS;
ic->ic_receive_len = sizeof(struct iscsi_bhs);
ic->ic_receive_pdu = NULL;
isc->receive_state = ICL_CONN_STATE_BHS;
isc->receive_len = sizeof(struct iscsi_bhs);
isc->receive_pdu = NULL;
return (request);
default:
panic("invalid ic_receive_state %d\n", ic->ic_receive_state);
panic("invalid receive_state %d\n", isc->receive_state);
}
if (error != 0) {
/*
* Don't free the PDU; it's pointed to by ic->ic_receive_pdu
* Don't free the PDU; it's pointed to by isc->receive_pdu
* and will get freed in icl_soft_conn_close().
*/
icl_conn_fail(ic);
@ -663,8 +683,9 @@ icl_conn_receive_pdu(struct icl_conn *ic, struct mbuf **r, size_t *rs)
}
static void
icl_conn_receive_pdus(struct icl_conn *ic, struct mbuf **r, size_t *rs)
icl_conn_receive_pdus(struct icl_soft_conn *isc, struct mbuf **r, size_t *rs)
{
struct icl_conn *ic = &isc->ic;
struct icl_pdu *response;
for (;;) {
@ -675,15 +696,15 @@ icl_conn_receive_pdus(struct icl_conn *ic, struct mbuf **r, size_t *rs)
* Loop until we have a complete PDU or there is not enough
* data in the socket buffer.
*/
if (*rs < ic->ic_receive_len) {
if (*rs < isc->receive_len) {
#if 0
ICL_DEBUG("not enough data; have %zd, need %zd",
*rs, ic->ic_receive_len);
*rs, isc->receive_len);
#endif
return;
}
response = icl_conn_receive_pdu(ic, r, rs);
response = icl_conn_receive_pdu(isc, r, rs);
if (response == NULL)
continue;
@ -703,14 +724,14 @@ icl_conn_receive_pdus(struct icl_conn *ic, struct mbuf **r, size_t *rs)
static void
icl_receive_thread(void *arg)
{
struct icl_conn *ic;
struct icl_soft_conn *isc = arg;
struct icl_conn *ic = &isc->ic;
size_t available, read = 0;
struct socket *so;
struct mbuf *m, *r = NULL;
struct uio uio;
int error, flags;
ic = arg;
so = ic->ic_socket;
for (;;) {
@ -727,9 +748,9 @@ icl_receive_thread(void *arg)
* is enough data received to read the PDU.
*/
available = sbavail(&so->so_rcv);
if (read + available < ic->ic_receive_len) {
so->so_rcv.sb_lowat = ic->ic_receive_len - read;
cv_wait(&ic->ic_receive_cv, SOCKBUF_MTX(&so->so_rcv));
if (read + available < isc->receive_len) {
so->so_rcv.sb_lowat = isc->receive_len - read;
cv_wait(&isc->receive_cv, SOCKBUF_MTX(&so->so_rcv));
so->so_rcv.sb_lowat = so->so_rcv.sb_hiwat + 1;
available = sbavail(&so->so_rcv);
}
@ -764,15 +785,15 @@ icl_receive_thread(void *arg)
r = m;
read += available;
icl_conn_receive_pdus(ic, &r, &read);
icl_conn_receive_pdus(isc, &r, &read);
}
if (r)
m_freem(r);
ICL_CONN_LOCK(ic);
ic->ic_receive_running = false;
cv_signal(&ic->ic_send_cv);
isc->receive_running = false;
cv_signal(&isc->send_cv);
ICL_CONN_UNLOCK(ic);
kthread_exit();
}
@ -780,13 +801,13 @@ icl_receive_thread(void *arg)
static int
icl_soupcall_receive(struct socket *so, void *arg, int waitflag)
{
struct icl_conn *ic;
struct icl_soft_conn *isc;
if (!soreadable(so))
return (SU_OK);
ic = arg;
cv_signal(&ic->ic_receive_cv);
isc = arg;
cv_signal(&isc->receive_cv);
return (SU_OK);
}
@ -846,8 +867,9 @@ icl_pdu_finalize(struct icl_pdu *request)
}
static void
icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
icl_conn_send_pdus(struct icl_soft_conn *isc, struct icl_pdu_stailq *queue)
{
struct icl_conn *ic = &isc->ic;
struct icl_pdu *request, *request2;
struct mbuf *m;
struct socket *so;
@ -866,7 +888,7 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
* of error.
*/
available = sbspace(&so->so_snd);
ic->ic_check_send_space = false;
isc->check_send_space = false;
/*
* Notify the socket upcall that we don't need wakeups
@ -961,10 +983,12 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
static void
icl_send_thread(void *arg)
{
struct icl_soft_conn *isc;
struct icl_conn *ic;
struct icl_pdu_stailq queue;
ic = arg;
isc = arg;
ic = &isc->ic;
STAILQ_INIT(&queue);
@ -976,18 +1000,18 @@ icl_send_thread(void *arg)
* This way the icl_conn_send_pdus() can go through
* all the queued PDUs without holding any locks.
*/
if (STAILQ_EMPTY(&queue) || ic->ic_check_send_space)
STAILQ_CONCAT(&queue, &ic->ic_to_send);
if (STAILQ_EMPTY(&queue) || isc->check_send_space)
STAILQ_CONCAT(&queue, &isc->to_send);
ICL_CONN_UNLOCK(ic);
icl_conn_send_pdus(ic, &queue);
icl_conn_send_pdus(isc, &queue);
ICL_CONN_LOCK(ic);
/*
* The icl_soupcall_send() was called since the last
* call to sbspace(); go around;
*/
if (ic->ic_check_send_space)
if (isc->check_send_space)
continue;
/*
@ -995,7 +1019,7 @@ icl_send_thread(void *arg)
* in the main one; go around.
*/
if (STAILQ_EMPTY(&queue) &&
!STAILQ_EMPTY(&ic->ic_to_send))
!STAILQ_EMPTY(&isc->to_send))
continue;
/*
@ -1011,17 +1035,17 @@ icl_send_thread(void *arg)
break;
}
cv_wait(&ic->ic_send_cv, ic->ic_lock);
cv_wait(&isc->send_cv, ic->ic_lock);
}
/*
* We're exiting; move PDUs back to the main queue, so they can
* get freed properly. At this point ordering doesn't matter.
*/
STAILQ_CONCAT(&ic->ic_to_send, &queue);
STAILQ_CONCAT(&isc->to_send, &queue);
ic->ic_send_running = false;
cv_signal(&ic->ic_send_cv);
isc->send_running = false;
cv_signal(&isc->send_cv);
ICL_CONN_UNLOCK(ic);
kthread_exit();
}
@ -1029,18 +1053,20 @@ icl_send_thread(void *arg)
static int
icl_soupcall_send(struct socket *so, void *arg, int waitflag)
{
struct icl_soft_conn *isc;
struct icl_conn *ic;
if (!sowriteable(so))
return (SU_OK);
ic = arg;
isc = arg;
ic = &isc->ic;
ICL_CONN_LOCK(ic);
ic->ic_check_send_space = true;
isc->check_send_space = true;
ICL_CONN_UNLOCK(ic);
cv_signal(&ic->ic_send_cv);
cv_signal(&isc->send_cv);
return (SU_OK);
}
@ -1112,6 +1138,7 @@ static void
icl_soft_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip,
icl_pdu_cb cb)
{
struct icl_soft_conn *isc = (struct icl_soft_conn *)ic;
struct icl_soft_pdu *isp = (struct icl_soft_pdu *)ip;
ICL_CONN_LOCK_ASSERT(ic);
@ -1124,8 +1151,8 @@ icl_soft_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip,
return;
}
if (!STAILQ_EMPTY(&ic->ic_to_send)) {
STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next);
if (!STAILQ_EMPTY(&isc->to_send)) {
STAILQ_INSERT_TAIL(&isc->to_send, ip, ip_next);
/*
* If the queue is not empty, someone else had already
* signaled the send thread; no need to do that again,
@ -1134,23 +1161,27 @@ icl_soft_conn_pdu_queue_cb(struct icl_conn *ic, struct icl_pdu *ip,
return;
}
STAILQ_INSERT_TAIL(&ic->ic_to_send, ip, ip_next);
cv_signal(&ic->ic_send_cv);
STAILQ_INSERT_TAIL(&isc->to_send, ip, ip_next);
cv_signal(&isc->send_cv);
}
static struct icl_conn *
icl_soft_new_conn(const char *name, struct mtx *lock)
{
struct icl_soft_conn *isc;
struct icl_conn *ic;
refcount_acquire(&icl_ncons);
ic = (struct icl_conn *)kobj_create(&icl_soft_class, M_ICL_SOFT, M_WAITOK | M_ZERO);
isc = (struct icl_soft_conn *)kobj_create(&icl_soft_class, M_ICL_SOFT,
M_WAITOK | M_ZERO);
STAILQ_INIT(&ic->ic_to_send);
STAILQ_INIT(&isc->to_send);
cv_init(&isc->send_cv, "icl_tx");
cv_init(&isc->receive_cv, "icl_rx");
ic = &isc->ic;
ic->ic_lock = lock;
cv_init(&ic->ic_send_cv, "icl_tx");
cv_init(&ic->ic_receive_cv, "icl_rx");
#ifdef DIAGNOSTIC
refcount_init(&ic->ic_outstanding_pdus, 0);
#endif
@ -1164,21 +1195,23 @@ icl_soft_new_conn(const char *name, struct mtx *lock)
void
icl_soft_conn_free(struct icl_conn *ic)
{
struct icl_soft_conn *isc = (struct icl_soft_conn *)ic;
#ifdef DIAGNOSTIC
KASSERT(ic->ic_outstanding_pdus == 0,
("destroying session with %d outstanding PDUs",
ic->ic_outstanding_pdus));
#endif
cv_destroy(&ic->ic_send_cv);
cv_destroy(&ic->ic_receive_cv);
kobj_delete((struct kobj *)ic, M_ICL_SOFT);
cv_destroy(&isc->send_cv);
cv_destroy(&isc->receive_cv);
kobj_delete((struct kobj *)isc, M_ICL_SOFT);
refcount_release(&icl_ncons);
}
static int
icl_conn_start(struct icl_conn *ic)
{
struct icl_soft_conn *isc = (struct icl_soft_conn *)ic;
size_t minspace;
struct sockopt opt;
int error, one = 1;
@ -1193,8 +1226,8 @@ icl_conn_start(struct icl_conn *ic)
return (EINVAL);
}
ic->ic_receive_state = ICL_CONN_STATE_BHS;
ic->ic_receive_len = sizeof(struct iscsi_bhs);
isc->receive_state = ICL_CONN_STATE_BHS;
isc->receive_len = sizeof(struct iscsi_bhs);
ic->ic_disconnecting = false;
ICL_CONN_UNLOCK(ic);
@ -1251,25 +1284,25 @@ icl_conn_start(struct icl_conn *ic)
* and free space to send outgoing ones.
*/
SOCKBUF_LOCK(&ic->ic_socket->so_snd);
soupcall_set(ic->ic_socket, SO_SND, icl_soupcall_send, ic);
soupcall_set(ic->ic_socket, SO_SND, icl_soupcall_send, isc);
SOCKBUF_UNLOCK(&ic->ic_socket->so_snd);
SOCKBUF_LOCK(&ic->ic_socket->so_rcv);
soupcall_set(ic->ic_socket, SO_RCV, icl_soupcall_receive, ic);
soupcall_set(ic->ic_socket, SO_RCV, icl_soupcall_receive, isc);
SOCKBUF_UNLOCK(&ic->ic_socket->so_rcv);
/*
* Start threads.
*/
ICL_CONN_LOCK(ic);
ic->ic_send_running = ic->ic_receive_running = true;
isc->send_running = isc->receive_running = true;
ICL_CONN_UNLOCK(ic);
error = kthread_add(icl_send_thread, ic, NULL, NULL, 0, 0, "%stx",
ic->ic_name);
if (error != 0) {
ICL_WARN("kthread_add(9) failed with error %d", error);
ICL_CONN_LOCK(ic);
ic->ic_send_running = ic->ic_receive_running = false;
cv_signal(&ic->ic_send_cv);
isc->send_running = isc->receive_running = false;
cv_signal(&isc->send_cv);
ICL_CONN_UNLOCK(ic);
icl_soft_conn_close(ic);
return (error);
@ -1279,8 +1312,8 @@ icl_conn_start(struct icl_conn *ic)
if (error != 0) {
ICL_WARN("kthread_add(9) failed with error %d", error);
ICL_CONN_LOCK(ic);
ic->ic_receive_running = false;
cv_signal(&ic->ic_send_cv);
isc->receive_running = false;
cv_signal(&isc->send_cv);
ICL_CONN_UNLOCK(ic);
icl_soft_conn_close(ic);
return (error);
@ -1355,6 +1388,7 @@ icl_soft_conn_handoff(struct icl_conn *ic, int fd)
void
icl_soft_conn_close(struct icl_conn *ic)
{
struct icl_soft_conn *isc = (struct icl_soft_conn *)ic;
struct icl_pdu *pdu;
struct socket *so;
@ -1371,10 +1405,10 @@ icl_soft_conn_close(struct icl_conn *ic)
if (so)
SOCKBUF_UNLOCK(&so->so_rcv);
}
while (ic->ic_receive_running || ic->ic_send_running) {
cv_signal(&ic->ic_receive_cv);
cv_signal(&ic->ic_send_cv);
cv_wait(&ic->ic_send_cv, ic->ic_lock);
while (isc->receive_running || isc->send_running) {
cv_signal(&isc->receive_cv);
cv_signal(&isc->send_cv);
cv_wait(&isc->send_cv, ic->ic_lock);
}
/* Some other thread could close the connection same time. */
@ -1400,22 +1434,22 @@ icl_soft_conn_close(struct icl_conn *ic)
soclose(so);
ICL_CONN_LOCK(ic);
if (ic->ic_receive_pdu != NULL) {
if (isc->receive_pdu != NULL) {
//ICL_DEBUG("freeing partially received PDU");
icl_soft_conn_pdu_free(ic, ic->ic_receive_pdu);
ic->ic_receive_pdu = NULL;
icl_soft_conn_pdu_free(ic, isc->receive_pdu);
isc->receive_pdu = NULL;
}
/*
* Remove any outstanding PDUs from the send queue.
*/
while (!STAILQ_EMPTY(&ic->ic_to_send)) {
pdu = STAILQ_FIRST(&ic->ic_to_send);
STAILQ_REMOVE_HEAD(&ic->ic_to_send, ip_next);
while (!STAILQ_EMPTY(&isc->to_send)) {
pdu = STAILQ_FIRST(&isc->to_send);
STAILQ_REMOVE_HEAD(&isc->to_send, ip_next);
icl_soft_pdu_done(pdu, ENOTCONN);
}
KASSERT(STAILQ_EMPTY(&ic->ic_to_send),
KASSERT(STAILQ_EMPTY(&isc->to_send),
("destroying session with non-empty send queue"));
ICL_CONN_UNLOCK(ic);
}