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libiscsi: Also parse residual if SCSI status != GOOD

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This change is needed for the test_write*_residuals tests.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
This commit is contained in:
Bart Van Assche
2014-07-16 15:13:43 +02:00
committed by Ronnie Sahlberg
parent 370741f83d
commit d77765548f
1 changed files with 23 additions and 16 deletions
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39
lib/iscsi-command.c
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@@ -347,7 +347,7 @@ int
iscsi_process_scsi_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
struct iscsi_in_pdu *in)
{
uint32_t flags, status;
uint8_t flags, response, status;
struct iscsi_scsi_cbdata *scsi_cbdata = &pdu->scsi_cbdata;
struct scsi_task *task = scsi_cbdata->task;
@@ -370,6 +370,28 @@ iscsi_process_scsi_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
return -1;
}
response = in->hdr[2];
task->residual_status = SCSI_RESIDUAL_NO_RESIDUAL;
task->residual = 0;
if (flags & (ISCSI_PDU_DATA_RESIDUAL_OVERFLOW|
ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW)) {
if (response != 0) {
iscsi_set_error(iscsi, "protocol error: flags %#02x;"
" response %#02x.", flags, response);
pdu->callback(iscsi, SCSI_STATUS_ERROR, task,
pdu->private_data);
return -1;
}
task->residual = scsi_get_uint32(&in->hdr[44]);
if (flags & ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW) {
task->residual_status = SCSI_RESIDUAL_UNDERFLOW;
} else {
task->residual_status = SCSI_RESIDUAL_OVERFLOW;
}
}
status = in->hdr[3];
switch (status) {
@@ -378,21 +400,6 @@ iscsi_process_scsi_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
task->datain.data = pdu->indata.data;
task->datain.size = pdu->indata.size;
task->residual_status = SCSI_RESIDUAL_NO_RESIDUAL;
task->residual = 0;
/*
* These flags should only be set if the S flag is also set
*/
if (flags & (ISCSI_PDU_DATA_RESIDUAL_OVERFLOW|ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW)) {
task->residual = scsi_get_uint32(&in->hdr[44]);
if (flags & ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW) {
task->residual_status = SCSI_RESIDUAL_UNDERFLOW;
} else {
task->residual_status = SCSI_RESIDUAL_OVERFLOW;
}
}
/* the pdu->datain.data was malloc'ed by iscsi_malloc,
as long as we have no struct iscsi_task we cannot track
the free'ing of this buffer which is currently