int iscsit_do_build_list(
struct iscsi_cmd *cmd,
struct iscsi_build_list *bl)
{
u32 pdu_count = 0, seq_count = 1;
struct iscsi_conn *conn = cmd->conn;
struct iscsi_pdu *pdu = NULL;
struct iscsi_seq *seq = NULL;
iscsit_determine_counts_for_list(cmd, bl, &seq_count, &pdu_count);
if (!conn->sess->sess_ops->DataSequenceInOrder) {
seq = kzalloc(seq_count * sizeof(struct iscsi_seq), GFP_ATOMIC);
if (!seq) {
pr_err("Unable to allocate struct iscsi_seq list\n");
return -1;
}
cmd->seq_list = seq;
cmd->seq_count = seq_count;
}
if (!conn->sess->sess_ops->DataPDUInOrder) {
pdu = kzalloc(pdu_count * sizeof(struct iscsi_pdu), GFP_ATOMIC);
if (!pdu) {
pr_err("Unable to allocate struct iscsi_pdu list.\n");
kfree(seq);
return -1;
}
cmd->pdu_list = pdu;
cmd->pdu_count = pdu_count;
}
return iscsit_build_pdu_and_seq_list(cmd, bl);
}
int iscsit_build_pdu_and_seq_lists(
struct iscsi_cmd *cmd,
u32 immediate_data_length)
{
struct iscsi_build_list bl;
u32 pdu_count = 0, seq_count = 1;
struct iscsi_conn *conn = cmd->conn;
struct iscsi_pdu *pdu = NULL;
struct iscsi_seq *seq = NULL;
struct iscsi_session *sess = conn->sess;
struct iscsi_node_attrib *na;
/*
* Do nothing if no OOO shenanigans
*/
if (sess->sess_ops->DataSequenceInOrder &&
sess->sess_ops->DataPDUInOrder)
return 0;
if (cmd->data_direction == DMA_NONE)
return 0;
na = iscsit_tpg_get_node_attrib(sess);
memset(&bl, 0, sizeof(struct iscsi_build_list));
if (cmd->data_direction == DMA_FROM_DEVICE) {
bl.data_direction = ISCSI_PDU_READ;
bl.type = PDULIST_NORMAL;
if (na->random_datain_pdu_offsets)
bl.randomize |= RANDOM_DATAIN_PDU_OFFSETS;
if (na->random_datain_seq_offsets)
bl.randomize |= RANDOM_DATAIN_SEQ_OFFSETS;
} else {
bl.data_direction = ISCSI_PDU_WRITE;
bl.immediate_data_length = immediate_data_length;
if (na->random_r2t_offsets)
bl.randomize |= RANDOM_R2T_OFFSETS;
if (!cmd->immediate_data && !cmd->unsolicited_data)
bl.type = PDULIST_NORMAL;
else if (cmd->immediate_data && !cmd->unsolicited_data)
bl.type = PDULIST_IMMEDIATE;
else if (!cmd->immediate_data && cmd->unsolicited_data)
bl.type = PDULIST_UNSOLICITED;
else if (cmd->immediate_data && cmd->unsolicited_data)
bl.type = PDULIST_IMMEDIATE_AND_UNSOLICITED;
}
iscsit_determine_counts_for_list(cmd, &bl, &seq_count, &pdu_count);
if (!conn->sess->sess_ops->DataSequenceInOrder) {
seq = kcalloc(seq_count, sizeof(struct iscsi_seq), GFP_ATOMIC);
if (!seq) {
pr_err("Unable to allocate struct iscsi_seq list\n");
return -ENOMEM;
}
cmd->seq_list = seq;
cmd->seq_count = seq_count;
}
if (!conn->sess->sess_ops->DataPDUInOrder) {
pdu = kcalloc(pdu_count, sizeof(struct iscsi_pdu), GFP_ATOMIC);
if (!pdu) {
pr_err("Unable to allocate struct iscsi_pdu list.\n");
kfree(seq);
return -ENOMEM;
}
cmd->pdu_list = pdu;
cmd->pdu_count = pdu_count;
}
return iscsit_do_build_pdu_and_seq_lists(cmd, &bl);
}
