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libiscsi: Avoid discontinuities in cmdsn ordering in some cases

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We should plug the cmdsn gap in order to continue
to use the session when the pdus is cancelled before
sending out.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
This commit is contained in:
Xie Yongji
2020-06-02 20:15:50 +08:00
parent 7258fbfd83
commit 10868c491d
3 changed files with 39 additions and 5 deletions
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3
lib/nop.c
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@@ -64,7 +64,7 @@ iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
iscsi_pdu_set_lun(pdu, 0);
/* cmdsn */
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn++);
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->callback = cb;
pdu->private_data = private_data;
@@ -83,6 +83,7 @@ iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
return -1;
}
iscsi->cmdsn++;
iscsi->nops_in_flight++;
ISCSI_LOG(iscsi, (iscsi->nops_in_flight > 1) ? 1 : 6,
"NOP Out Send (nops_in_flight: %d, pdu->cmdsn %08x, pdu->itt %08x, pdu->ttt %08x, iscsi->maxcmdsn %08x, iscsi->expcmdsn %08x)",