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cxgbe tom: Account for pre-iSCSI mode data on suspended connections.

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Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D29907
This commit is contained in:
John Baldwin 2021-05-14 12:17:02 -07:00
parent 91ca7b0954
commit 23b209ee88
1 changed files with 27 additions and 1 deletions
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28
sys/dev/cxgbe/tom/t4_cpl_io.c
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@ -1081,8 +1081,34 @@ t4_push_pdus(struct adapter *sc, struct toepcb *toep, int drop)
return;
}
if (drop)
if (drop) {
struct socket *so = inp->inp_socket;
struct sockbuf *sb = &so->so_snd;
int sbu;
/*
* An unlocked read is ok here as the data should only
* transition from a non-zero value to either another
* non-zero value or zero. Once it is zero it should
* stay zero.
*/
if (__predict_false(sbused(sb)) > 0) {
SOCKBUF_LOCK(sb);
sbu = sbused(sb);
if (sbu > 0) {
/*
* The data transmitted before the
* tid's ULP mode changed to ISCSI is
* still in so_snd. Incoming credits
* should account for so_snd first.
*/
sbdrop_locked(sb, min(sbu, drop));
drop -= min(sbu, drop);
}
sowwakeup_locked(so); /* unlocks so_snd */
}
rqdrop_locked(&toep->ulp_pdu_reclaimq, drop);
}
while ((sndptr = mbufq_first(pduq)) != NULL) {
wr = write_iscsi_mbuf_wr(toep, sndptr);