static int iscsit_dataout_post_crc_failed(
struct iscsi_cmd *cmd,
unsigned char *buf)
{
struct iscsi_conn *conn = cmd->conn;
struct iscsi_pdu *pdu;
struct iscsi_data *hdr = (struct iscsi_data *) buf;
u32 payload_length = ntoh24(hdr->dlength);
if (conn->sess->sess_ops->DataPDUInOrder)
goto recover;
/*
* The rest of this function is only called when DataPDUInOrder=No.
*/
pdu = cmd->pdu_ptr;
switch (pdu->status) {
case ISCSI_PDU_NOT_RECEIVED:
pdu->status = ISCSI_PDU_CRC_FAILED;
break;
case ISCSI_PDU_CRC_FAILED:
break;
case ISCSI_PDU_TIMED_OUT:
pdu->status = ISCSI_PDU_CRC_FAILED;
break;
default:
return DATAOUT_CANNOT_RECOVER;
}
recover:
return iscsit_recover_dataout_sequence(cmd, be32_to_cpu(hdr->offset),
payload_length);
}
static int iscsit_dataout_pre_datapduinorder_yes(
struct iscsi_cmd *cmd,
unsigned char *buf)
{
int dump = 0, recovery = 0;
struct iscsi_conn *conn = cmd->conn;
struct iscsi_data *hdr = (struct iscsi_data *) buf;
u32 payload_length = ntoh24(hdr->dlength);
/*
* For DataSequenceInOrder=Yes: If the offset is greater than the global
* DataPDUInOrder=Yes offset counter in struct iscsi_cmd a protcol error has
* occured and fail the connection.
*
* For DataSequenceInOrder=No: If the offset is greater than the per
* sequence DataPDUInOrder=Yes offset counter in struct iscsi_seq a protocol
* error has occured and fail the connection.
*/
if (conn->sess->sess_ops->DataSequenceInOrder) {
if (hdr->offset != cmd->write_data_done) {
pr_err("Command ITT: 0x%08x, received offset"
" %u different than expected %u.\n", cmd->init_task_tag,
hdr->offset, cmd->write_data_done);
recovery = 1;
goto recover;
}
} else {
struct iscsi_seq *seq = cmd->seq_ptr;
if (hdr->offset > seq->offset) {
pr_err("Command ITT: 0x%08x, received offset"
" %u greater than expected %u.\n", cmd->init_task_tag,
hdr->offset, seq->offset);
recovery = 1;
goto recover;
} else if (hdr->offset < seq->offset) {
pr_err("Command ITT: 0x%08x, received offset"
" %u less than expected %u, discarding payload.\n",
cmd->init_task_tag, hdr->offset, seq->offset);
dump = 1;
goto dump;
}
}
return DATAOUT_NORMAL;
recover:
if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
pr_err("Unable to perform within-command recovery"
" while ERL=0.\n");
return DATAOUT_CANNOT_RECOVER;
}
dump:
if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
return DATAOUT_CANNOT_RECOVER;
return (recovery) ? iscsit_recover_dataout_sequence(cmd,
hdr->offset, payload_length) :
(dump) ? DATAOUT_WITHIN_COMMAND_RECOVERY : DATAOUT_NORMAL;
}