static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
void *arg)
{
struct fcoe_ctlr *fip = arg;
struct fc_exch *exch = fc_seq_exch(seq);
struct fc_lport *lport = exch->lp;
u8 *mac;
u8 op;
if (IS_ERR(fp))
goto done;
mac = fr_cb(fp)->granted_mac;
if (is_zero_ether_addr(mac)) {
op = fc_frame_payload_op(fp);
if (lport->vport) {
if (op == ELS_LS_RJT) {
printk(KERN_ERR PFX "bnx2fc_flogi_resp is LS_RJT\n");
fc_vport_terminate(lport->vport);
fc_frame_free(fp);
return;
}
}
fcoe_ctlr_recv_flogi(fip, lport, fp);
}
if (!is_zero_ether_addr(mac))
fip->update_mac(lport, mac);
done:
fc_lport_flogi_resp(seq, fp, lport);
}
/*
* Handle and cleanup any HW specific resources if
* received ABORTS, errors, timeouts.
*/
void ft_invl_hw_context(struct ft_cmd *cmd)
{
struct fc_seq *seq;
struct fc_exch *ep = NULL;
struct fc_lport *lport = NULL;
BUG_ON(!cmd);
seq = cmd->seq;
/* Cleanup the DDP context in HW if DDP was setup */
if (cmd->was_ddp_setup && seq) {
ep = fc_seq_exch(seq);
if (ep) {
lport = ep->lp;
if (lport && (ep->xid <= lport->lro_xid)) {
/*
* "ddp_done" trigger invalidation of HW
* specific DDP context
*/
cmd->write_data_len = lport->tt.ddp_done(lport,
ep->xid);
/*
* Resetting same variable to indicate HW's
* DDP context has been invalidated to avoid
* re_invalidation of same context (context is
* identified using ep->xid)
*/
cmd->was_ddp_setup = 0;
}
}
}
}
static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
struct fc_lport *lport)
{
struct fc_frame *fp;
struct fc_exch *ep = fc_seq_exch(sp);
unsigned int len;
void *pp;
void *dp;
u32 f_ctl;
FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
fc_lport_state(lport));
len = fr_len(in_fp) - sizeof(struct fc_frame_header);
pp = fc_frame_payload_get(in_fp, len);
if (len < sizeof(__be32))
len = sizeof(__be32);
fp = fc_frame_alloc(lport, len);
if (fp) {
dp = fc_frame_payload_get(fp, len);
memcpy(dp, pp, len);
*((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
sp = lport->tt.seq_start_next(sp);
f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
FC_TYPE_ELS, f_ctl, 0);
lport->tt.seq_send(lport, sp, fp);
}
fc_frame_free(in_fp);
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
/*
* Dump cmd state for debugging.
*/
static void _ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
{
struct fc_exch *ep;
struct fc_seq *sp;
struct se_cmd *se_cmd;
struct scatterlist *sg;
int count;
se_cmd = &cmd->se_cmd;
pr_debug("%s: cmd %p sess %p seq %p se_cmd %p\n",
caller, cmd, cmd->sess, cmd->seq, se_cmd);
pr_debug("%s: cmd %p data_nents %u len %u se_cmd_flags <0x%x>\n",
caller, cmd, se_cmd->t_data_nents,
se_cmd->data_length, se_cmd->se_cmd_flags);
for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, count)
pr_debug("%s: cmd %p sg %p page %p "
"len 0x%x off 0x%x\n",
caller, cmd, sg,
sg_page(sg), sg->length, sg->offset);
sp = cmd->seq;
if (sp) {
ep = fc_seq_exch(sp);
pr_debug("%s: cmd %p sid %x did %x "
"ox_id %x rx_id %x seq_id %x e_stat %x\n",
caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid,
sp->id, ep->esb_stat);
}
}
u32 ft_get_task_tag(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
if (cmd->aborted)
return ~0;
return fc_seq_exch(cmd->seq)->rxid;
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
/*
* cmd may have been broken up into multiple
* tasks. Link their sgs together so we can
* operate on them all at once.
*/
transport_do_task_sg_chain(se_cmd);
cmd->sg = se_cmd->t_tasks_sg_chained;
cmd->sg_cnt =
se_cmd->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
cmd->sg,
cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
static void ft_send_work(struct work_struct *work)
{
struct ft_cmd *cmd = container_of(work, struct ft_cmd, work);
struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame);
struct fcp_cmnd *fcp;
int data_dir = 0;
int task_attr;
fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
if (!fcp)
goto err;
if (fcp->fc_flags & FCP_CFL_LEN_MASK)
goto err;
if (fcp->fc_tm_flags) {
ft_send_tm(cmd);
return;
}
switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) {
case 0:
data_dir = DMA_NONE;
break;
case FCP_CFL_RDDATA:
data_dir = DMA_FROM_DEVICE;
break;
case FCP_CFL_WRDATA:
data_dir = DMA_TO_DEVICE;
break;
case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
goto err;
}
switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
case FCP_PTA_HEADQ:
task_attr = MSG_HEAD_TAG;
break;
case FCP_PTA_ORDERED:
task_attr = MSG_ORDERED_TAG;
break;
case FCP_PTA_ACA:
task_attr = MSG_ACA_TAG;
break;
case FCP_PTA_SIMPLE:
default:
task_attr = MSG_SIMPLE_TAG;
}
fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb,
&cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
ntohl(fcp->fc_dl), task_attr, data_dir, 0);
pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl);
return;
err:
ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID);
}
static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
struct fc_lport *lport)
{
struct fc_frame *fp;
struct fc_exch *ep = fc_seq_exch(sp);
struct fc_els_rnid *req;
struct {
struct fc_els_rnid_resp rnid;
struct fc_els_rnid_cid cid;
struct fc_els_rnid_gen gen;
} *rp;
struct fc_seq_els_data rjt_data;
u8 fmt;
size_t len;
u32 f_ctl;
FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
fc_lport_state(lport));
req = fc_frame_payload_get(in_fp, sizeof(*req));
if (!req) {
rjt_data.fp = NULL;
rjt_data.reason = ELS_RJT_LOGIC;
rjt_data.explan = ELS_EXPL_NONE;
lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
} else {
fmt = req->rnid_fmt;
len = sizeof(*rp);
if (fmt != ELS_RNIDF_GEN ||
ntohl(lport->rnid_gen.rnid_atype) == 0) {
fmt = ELS_RNIDF_NONE; /* nothing to provide */
len -= sizeof(rp->gen);
}
fp = fc_frame_alloc(lport, len);
if (fp) {
rp = fc_frame_payload_get(fp, len);
memset(rp, 0, len);
rp->rnid.rnid_cmd = ELS_LS_ACC;
rp->rnid.rnid_fmt = fmt;
rp->rnid.rnid_cid_len = sizeof(rp->cid);
rp->cid.rnid_wwpn = htonll(lport->wwpn);
rp->cid.rnid_wwnn = htonll(lport->wwnn);
if (fmt == ELS_RNIDF_GEN) {
rp->rnid.rnid_sid_len = sizeof(rp->gen);
memcpy(&rp->gen, &lport->rnid_gen,
sizeof(rp->gen));
}
sp = lport->tt.seq_start_next(sp);
f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
FC_TYPE_ELS, f_ctl, 0);
lport->tt.seq_send(lport, sp, fp);
}
}
fc_frame_free(in_fp);
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
/*
* Map se_mem list to scatterlist, so that
* DDP can be setup. DDP setup function require
* scatterlist. se_mem_list is internal to
* TCM/LIO target
*/
transport_do_task_sg_chain(se_cmd);
cmd->sg = T_TASK(se_cmd)->t_tasks_sg_chained;
cmd->sg_cnt =
T_TASK(se_cmd)->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_setup(lport, ep->xid,
cmd->sg, cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
/*
* Send response.
*/
int ft_queue_status(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_resp_with_ext *fcp;
struct fc_lport *lport;
struct fc_exch *ep;
size_t len;
if (cmd->aborted)
return 0;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
len = sizeof(*fcp) + se_cmd->scsi_sense_length;
fp = fc_frame_alloc(lport, len);
if (!fp) {
/* XXX shouldn't just drop it - requeue and retry? */
return 0;
}
fcp = fc_frame_payload_get(fp, len);
memset(fcp, 0, len);
fcp->resp.fr_status = se_cmd->scsi_status;
len = se_cmd->scsi_sense_length;
if (len) {
fcp->resp.fr_flags |= FCP_SNS_LEN_VAL;
fcp->ext.fr_sns_len = htonl(len);
memcpy((fcp + 1), se_cmd->sense_buffer, len);
}
/*
* Test underflow and overflow with one mask. Usually both are off.
* Bidirectional commands are not handled yet.
*/
if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) {
if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
fcp->resp.fr_flags |= FCP_RESID_OVER;
else
fcp->resp.fr_flags |= FCP_RESID_UNDER;
fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count);
}
/*
* Send response.
*/
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0);
lport->tt.seq_send(lport, cmd->seq, fp);
lport->tt.exch_done(cmd->seq);
return 0;
}
static void bnx2fc_logo_resp(struct fc_seq *seq, struct fc_frame *fp,
void *arg)
{
struct fcoe_ctlr *fip = arg;
struct fc_exch *exch = fc_seq_exch(seq);
struct fc_lport *lport = exch->lp;
static u8 zero_mac[ETH_ALEN] = { 0 };
if (!IS_ERR(fp))
fip->update_mac(lport, zero_mac);
fc_lport_logo_resp(seq, fp, lport);
}
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM;
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
if (f_ctl & FC_FC_EX_CTX) {
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
transport_do_task_sg_chain(se_cmd);
cmd->sg = se_cmd->t_tasks_sg_chained;
cmd->sg_cnt =
se_cmd->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
cmd->sg,
cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = fc_seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if ((se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) &&
lport->tt.ddp_target(lport, ep->xid,
se_cmd->t_data_sg,
se_cmd->t_data_nents))
cmd->was_ddp_setup = 1;
}
}
fc_seq_send(lport, cmd->seq, fp);
return 0;
}
int ft_queue_status(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_resp_with_ext *fcp;
struct fc_lport *lport;
struct fc_exch *ep;
size_t len;
if (cmd->aborted)
return 0;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
len = sizeof(*fcp) + se_cmd->scsi_sense_length;
fp = fc_frame_alloc(lport, len);
if (!fp) {
return 0;
}
fcp = fc_frame_payload_get(fp, len);
memset(fcp, 0, len);
fcp->resp.fr_status = se_cmd->scsi_status;
len = se_cmd->scsi_sense_length;
if (len) {
fcp->resp.fr_flags |= FCP_SNS_LEN_VAL;
fcp->ext.fr_sns_len = htonl(len);
memcpy((fcp + 1), se_cmd->sense_buffer, len);
}
if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) {
if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
fcp->resp.fr_flags |= FCP_RESID_OVER;
else
fcp->resp.fr_flags |= FCP_RESID_UNDER;
fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count);
}
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0);
lport->tt.seq_send(lport, cmd->seq, fp);
lport->tt.exch_done(cmd->seq);
return 0;
}
/*
* Deliver read data back to initiator.
* XXX TBD handle resource problems later.
*/
int ft_queue_data_in(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct se_transport_task *task;
struct fc_frame *fp = NULL;
struct fc_exch *ep;
struct fc_lport *lport;
struct se_mem *mem;
size_t remaining;
u32 f_ctl = FC_FC_EX_CTX | FC_FC_REL_OFF;
u32 mem_off;
u32 fh_off = 0;
u32 frame_off = 0;
size_t frame_len = 0;
size_t mem_len;
size_t tlen;
size_t off_in_page;
struct page *page;
int use_sg;
int error;
void *page_addr;
void *from;
void *to = NULL;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
cmd->seq = lport->tt.seq_start_next(cmd->seq);
task = T_TASK(se_cmd);
BUG_ON(!task);
remaining = se_cmd->data_length;
/*
* Setup to use first mem list entry if any.
*/
if (task->t_tasks_se_num) {
mem = list_first_entry(task->t_mem_list,
struct se_mem, se_list);
mem_len = mem->se_len;
mem_off = mem->se_off;
page = mem->se_page;
} else {
/*
* Dump cmd state for debugging.
*/
void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
{
struct fc_exch *ep;
struct fc_seq *sp;
struct se_cmd *se_cmd;
struct se_mem *mem;
struct se_transport_task *task;
if (!(ft_debug_logging & FT_DEBUG_IO))
return;
se_cmd = &cmd->se_cmd;
// printk(KERN_INFO "%s: cmd %p state %d sess %p seq %p se_cmd %p\n",
;
// printk(KERN_INFO "%s: cmd %p cdb %p\n",
;
;
task = T_TASK(se_cmd);
// printk(KERN_INFO "%s: cmd %p task %p se_num %u buf %p len %u se_cmd_flags <0x%x>\n",
// caller, cmd, task, task->t_tasks_se_num,
;
if (task->t_mem_list)
list_for_each_entry(mem, task->t_mem_list, se_list)
// printk(KERN_INFO "%s: cmd %p mem %p page %p "
// "len 0x%x off 0x%x\n",
// caller, cmd, mem,
;
sp = cmd->seq;
if (sp) {
ep = fc_seq_exch(sp);
// printk(KERN_INFO "%s: cmd %p sid %x did %x "
// "ox_id %x rx_id %x seq_id %x e_stat %x\n",
// caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid,
;
}
print_hex_dump(KERN_INFO, "ft_dump_cmd ", DUMP_PREFIX_NONE,
16, 4, cmd->cdb, MAX_COMMAND_SIZE, 0);
}
/*
* Dump cmd state for debugging.
*/
void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
{
struct fc_exch *ep;
struct fc_seq *sp;
struct se_cmd *se_cmd;
struct scatterlist *sg;
int count;
se_cmd = &cmd->se_cmd;
pr_debug("%s: cmd %p sess %p seq %p se_cmd %p\n",
caller, cmd, cmd->sess, cmd->seq, se_cmd);
pr_debug("%s: cmd %p cdb %p\n",
caller, cmd, cmd->cdb);
pr_debug("%s: cmd %p lun %d\n", caller, cmd, cmd->lun);
pr_debug("%s: cmd %p data_nents %u len %u se_cmd_flags <0x%x>\n",
caller, cmd, se_cmd->t_data_nents,
se_cmd->data_length, se_cmd->se_cmd_flags);
for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, count)
pr_debug("%s: cmd %p sg %p page %p "
"len 0x%x off 0x%x\n",
caller, cmd, sg,
sg_page(sg), sg->length, sg->offset);
sp = cmd->seq;
if (sp) {
ep = fc_seq_exch(sp);
pr_debug("%s: cmd %p sid %x did %x "
"ox_id %x rx_id %x seq_id %x e_stat %x\n",
caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid,
sp->id, ep->esb_stat);
}
print_hex_dump(KERN_INFO, "ft_dump_cmd ", DUMP_PREFIX_NONE,
16, 4, cmd->cdb, MAX_COMMAND_SIZE, 0);
}
/*
* Send read data back to initiator.
*/
int ft_send_read_data(struct scst_cmd *cmd)
{
struct ft_cmd *fcmd;
struct fc_frame *fp = NULL;
struct fc_exch *ep;
struct fc_lport *lport;
size_t remaining;
u32 fh_off = 0;
u32 frame_off;
size_t frame_len = 0;
size_t mem_len;
u32 mem_off;
size_t tlen;
struct page *page;
int use_sg;
int error;
void *to = NULL;
u8 *from = NULL;
int loop_limit = 10000;
fcmd = scst_cmd_get_tgt_priv(cmd);
ep = fc_seq_exch(fcmd->seq);
lport = ep->lp;
frame_off = fcmd->read_data_len;
tlen = scst_cmd_get_resp_data_len(cmd);
FT_IO_DBG("oid %x oxid %x resp_len %zd frame_off %u\n",
ep->oid, ep->oxid, tlen, frame_off);
if (tlen <= frame_off)
return SCST_TGT_RES_SUCCESS;
remaining = tlen - frame_off;
if (remaining > UINT_MAX)
FT_ERR("oid %x oxid %x resp_len %zd frame_off %u\n",
ep->oid, ep->oxid, tlen, frame_off);
mem_len = scst_get_buf_first(cmd, &from);
mem_off = 0;
if (!mem_len) {
FT_IO_DBG("mem_len 0\n");
return SCST_TGT_RES_SUCCESS;
}
FT_IO_DBG("sid %x oxid %x mem_len %zd frame_off %u remaining %zd\n",
ep->sid, ep->oxid, mem_len, frame_off, remaining);
/*
* If we've already transferred some of the data, skip through
* the buffer over the data already sent and continue with the
* same sequence. Otherwise, get a new sequence for the data.
*/
if (frame_off) {
tlen = frame_off;
while (mem_len <= tlen) {
tlen -= mem_len;
scst_put_buf(cmd, from);
mem_len = scst_get_buf_next(cmd, &from);
if (!mem_len)
return SCST_TGT_RES_SUCCESS;
}
mem_len -= tlen;
mem_off = tlen;
} else
fcmd->seq = lport->tt.seq_start_next(fcmd->seq);
/* no scatter/gather in skb for odd word length due to fc_seq_send() */
use_sg = !(remaining % 4) && lport->sg_supp;
while (remaining) {
if (!loop_limit) {
FT_ERR("hit loop limit. remaining %zx mem_len %zx "
"frame_len %zx tlen %zx\n",
remaining, mem_len, frame_len, tlen);
break;
}
loop_limit--;
if (!mem_len) {
scst_put_buf(cmd, from);
mem_len = scst_get_buf_next(cmd, &from);
mem_off = 0;
if (!mem_len) {
FT_ERR("mem_len 0 from get_buf_next\n");
break;
}
}
if (!frame_len) {
frame_len = fcmd->max_lso_payload;
frame_len = min(frame_len, remaining);
fp = fc_frame_alloc(lport, use_sg ? 0 : frame_len);
if (!fp) {
FT_IO_DBG("frame_alloc failed. "
"use_sg %d frame_len %zd\n",
use_sg, frame_len);
break;
}
fr_max_payload(fp) = fcmd->max_payload;
to = fc_frame_payload_get(fp, 0);
fh_off = frame_off;
}
tlen = min(mem_len, frame_len);
BUG_ON(!tlen);
BUG_ON(tlen > remaining);
BUG_ON(tlen > mem_len);
BUG_ON(tlen > frame_len);
if (use_sg) {
page = virt_to_page(from + mem_off);
get_page(page);
tlen = min_t(size_t, tlen,
PAGE_SIZE - (mem_off & ~PAGE_MASK));
skb_fill_page_desc(fp_skb(fp),
skb_shinfo(fp_skb(fp))->nr_frags,
page, offset_in_page(from + mem_off),
tlen);
fr_len(fp) += tlen;
fp_skb(fp)->data_len += tlen;
fp_skb(fp)->truesize +=
PAGE_SIZE << compound_order(page);
frame_len -= tlen;
if (skb_shinfo(fp_skb(fp))->nr_frags >= FC_FRAME_SG_LEN)
frame_len = 0;
} else {
memcpy(to, from + mem_off, tlen);
to += tlen;
frame_len -= tlen;
}
mem_len -= tlen;
mem_off += tlen;
remaining -= tlen;
frame_off += tlen;
if (frame_len)
continue;
fc_fill_fc_hdr(fp, FC_RCTL_DD_SOL_DATA, ep->did, ep->sid,
FC_TYPE_FCP,
remaining ? (FC_FC_EX_CTX | FC_FC_REL_OFF) :
(FC_FC_EX_CTX | FC_FC_REL_OFF | FC_FC_END_SEQ),
fh_off);
error = lport->tt.seq_send(lport, fcmd->seq, fp);
if (error) {
WARN_ON(1);
/* XXX For now, initiator will retry */
} else
fcmd->read_data_len = frame_off;
}
if (mem_len)
scst_put_buf(cmd, from);
if (remaining) {
FT_IO_DBG("remaining read data %zd\n", remaining);
return SCST_TGT_RES_QUEUE_FULL;
}
return SCST_TGT_RES_SUCCESS;
}
/*
* Deliver read data back to initiator.
* XXX TBD handle resource problems later.
*/
int ft_queue_data_in(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp = NULL;
struct fc_exch *ep;
struct fc_lport *lport;
struct scatterlist *sg = NULL;
size_t remaining;
u32 f_ctl = FC_FC_EX_CTX | FC_FC_REL_OFF;
u32 mem_off = 0;
u32 fh_off = 0;
u32 frame_off = 0;
size_t frame_len = 0;
size_t mem_len = 0;
size_t tlen;
size_t off_in_page;
struct page *page = NULL;
int use_sg;
int error;
void *page_addr;
void *from;
void *to = NULL;
if (cmd->aborted)
return 0;
if (se_cmd->scsi_status == SAM_STAT_TASK_SET_FULL)
goto queue_status;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
cmd->seq = lport->tt.seq_start_next(cmd->seq);
remaining = se_cmd->data_length;
/*
* Setup to use first mem list entry, unless no data.
*/
BUG_ON(remaining && !se_cmd->t_data_sg);
if (remaining) {
sg = se_cmd->t_data_sg;
mem_len = sg->length;
mem_off = sg->offset;
page = sg_page(sg);
}
/* no scatter/gather in skb for odd word length due to fc_seq_send() */
use_sg = !(remaining % 4);
while (remaining) {
struct fc_seq *seq = cmd->seq;
if (!seq) {
pr_debug("%s: Command aborted, xid 0x%x\n",
__func__, ep->xid);
break;
}
if (!mem_len) {
sg = sg_next(sg);
mem_len = min((size_t)sg->length, remaining);
mem_off = sg->offset;
page = sg_page(sg);
}
if (!frame_len) {
/*
* If lport's has capability of Large Send Offload LSO)
* , then allow 'frame_len' to be as big as 'lso_max'
* if indicated transfer length is >= lport->lso_max
*/
frame_len = (lport->seq_offload) ? lport->lso_max :
cmd->sess->max_frame;
frame_len = min(frame_len, remaining);
fp = fc_frame_alloc(lport, use_sg ? 0 : frame_len);
if (!fp)
return -ENOMEM;
to = fc_frame_payload_get(fp, 0);
fh_off = frame_off;
frame_off += frame_len;
/*
* Setup the frame's max payload which is used by base
* driver to indicate HW about max frame size, so that
* HW can do fragmentation appropriately based on
* "gso_max_size" of underline netdev.
*/
fr_max_payload(fp) = cmd->sess->max_frame;
}
tlen = min(mem_len, frame_len);
if (use_sg) {
off_in_page = mem_off;
BUG_ON(!page);
get_page(page);
skb_fill_page_desc(fp_skb(fp),
skb_shinfo(fp_skb(fp))->nr_frags,
page, off_in_page, tlen);
fr_len(fp) += tlen;
fp_skb(fp)->data_len += tlen;
fp_skb(fp)->truesize +=
PAGE_SIZE << compound_order(page);
} else {
BUG_ON(!page);
from = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
page_addr = from;
from += mem_off & ~PAGE_MASK;
tlen = min(tlen, (size_t)(PAGE_SIZE -
(mem_off & ~PAGE_MASK)));
memcpy(to, from, tlen);
kunmap_atomic(page_addr);
to += tlen;
}
mem_off += tlen;
mem_len -= tlen;
frame_len -= tlen;
remaining -= tlen;
if (frame_len &&
(skb_shinfo(fp_skb(fp))->nr_frags < FC_FRAME_SG_LEN))
continue;
if (!remaining)
f_ctl |= FC_FC_END_SEQ;
fc_fill_fc_hdr(fp, FC_RCTL_DD_SOL_DATA, ep->did, ep->sid,
FC_TYPE_FCP, f_ctl, fh_off);
error = lport->tt.seq_send(lport, seq, fp);
if (error) {
pr_info_ratelimited("%s: Failed to send frame %p, "
"xid <0x%x>, remaining %zu, "
"lso_max <0x%x>\n",
__func__, fp, ep->xid,
remaining, lport->lso_max);
/*
* Go ahead and set TASK_SET_FULL status ignoring the
* rest of the DataIN, and immediately attempt to
* send the response via ft_queue_status() in order
* to notify the initiator that it should reduce it's
* per LUN queue_depth.
*/
se_cmd->scsi_status = SAM_STAT_TASK_SET_FULL;
break;
}
}
queue_status:
return ft_queue_status(se_cmd);
}
/*
* Receive write data frame.
*/
void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
{
struct se_cmd *se_cmd = &cmd->se_cmd;
struct fc_seq *seq = cmd->seq;
struct fc_exch *ep;
struct fc_lport *lport;
struct fc_frame_header *fh;
struct scatterlist *sg = NULL;
u32 mem_off = 0;
u32 rel_off;
size_t frame_len;
size_t mem_len = 0;
size_t tlen;
struct page *page = NULL;
void *page_addr;
void *from;
void *to;
u32 f_ctl;
void *buf;
fh = fc_frame_header_get(fp);
if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
goto drop;
f_ctl = ntoh24(fh->fh_f_ctl);
ep = fc_seq_exch(seq);
lport = ep->lp;
if (cmd->was_ddp_setup) {
BUG_ON(!ep);
BUG_ON(!lport);
/*
* Since DDP (Large Rx offload) was setup for this request,
* payload is expected to be copied directly to user buffers.
*/
buf = fc_frame_payload_get(fp, 1);
if (buf)
pr_err("%s: xid 0x%x, f_ctl 0x%x, cmd->sg %p, "
"cmd->sg_cnt 0x%x. DDP was setup"
" hence not expected to receive frame with "
"payload, Frame will be dropped if"
"'Sequence Initiative' bit in f_ctl is"
"not set\n", __func__, ep->xid, f_ctl,
se_cmd->t_data_sg, se_cmd->t_data_nents);
/*
* Invalidate HW DDP context if it was setup for respective
* command. Invalidation of HW DDP context is requited in both
* situation (success and error).
*/
ft_invl_hw_context(cmd);
/*
* If "Sequence Initiative (TSI)" bit set in f_ctl, means last
* write data frame is received successfully where payload is
* posted directly to user buffer and only the last frame's
* header is posted in receive queue.
*
* If "Sequence Initiative (TSI)" bit is not set, means error
* condition w.r.t. DDP, hence drop the packet and let explict
* ABORTS from other end of exchange timer trigger the recovery.
*/
if (f_ctl & FC_FC_SEQ_INIT)
goto last_frame;
else
goto drop;
}
rel_off = ntohl(fh->fh_parm_offset);
frame_len = fr_len(fp);
if (frame_len <= sizeof(*fh))
goto drop;
frame_len -= sizeof(*fh);
from = fc_frame_payload_get(fp, 0);
if (rel_off >= se_cmd->data_length)
goto drop;
if (frame_len + rel_off > se_cmd->data_length)
frame_len = se_cmd->data_length - rel_off;
/*
* Setup to use first mem list entry, unless no data.
*/
BUG_ON(frame_len && !se_cmd->t_data_sg);
if (frame_len) {
sg = se_cmd->t_data_sg;
mem_len = sg->length;
mem_off = sg->offset;
page = sg_page(sg);
}
while (frame_len) {
if (!mem_len) {
sg = sg_next(sg);
mem_len = sg->length;
mem_off = sg->offset;
page = sg_page(sg);
}
if (rel_off >= mem_len) {
rel_off -= mem_len;
mem_len = 0;
continue;
}
mem_off += rel_off;
mem_len -= rel_off;
rel_off = 0;
tlen = min(mem_len, frame_len);
to = kmap_atomic(page + (mem_off >> PAGE_SHIFT));
page_addr = to;
to += mem_off & ~PAGE_MASK;
tlen = min(tlen, (size_t)(PAGE_SIZE -
(mem_off & ~PAGE_MASK)));
memcpy(to, from, tlen);
kunmap_atomic(page_addr);
from += tlen;
frame_len -= tlen;
mem_off += tlen;
mem_len -= tlen;
cmd->write_data_len += tlen;
}
last_frame:
if (cmd->write_data_len == se_cmd->data_length) {
INIT_WORK(&cmd->work, ft_execute_work);
queue_work(cmd->sess->tport->tpg->workqueue, &cmd->work);
}
drop:
fc_frame_free(fp);
}
static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
struct fc_frame *rx_fp,
struct fc_lport *lport)
{
struct fc_frame *fp;
struct fc_frame_header *fh;
struct fc_seq *sp;
struct fc_exch *ep;
struct fc_els_flogi *flp;
struct fc_els_flogi *new_flp;
u64 remote_wwpn;
u32 remote_fid;
u32 local_fid;
u32 f_ctl;
FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
fc_lport_state(lport));
fh = fc_frame_header_get(rx_fp);
remote_fid = ntoh24(fh->fh_s_id);
flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
if (!flp)
goto out;
remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
if (remote_wwpn == lport->wwpn) {
printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
"with same WWPN %16.16llx\n",
lport->host->host_no, remote_wwpn);
goto out;
}
FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
/*
* XXX what is the right thing to do for FIDs?
* The originator might expect our S_ID to be 0xfffffe.
* But if so, both of us could end up with the same FID.
*/
local_fid = FC_LOCAL_PTP_FID_LO;
if (remote_wwpn < lport->wwpn) {
local_fid = FC_LOCAL_PTP_FID_HI;
if (!remote_fid || remote_fid == local_fid)
remote_fid = FC_LOCAL_PTP_FID_LO;
} else if (!remote_fid) {
remote_fid = FC_LOCAL_PTP_FID_HI;
}
fc_lport_set_port_id(lport, local_fid, rx_fp);
fp = fc_frame_alloc(lport, sizeof(*flp));
if (fp) {
sp = lport->tt.seq_start_next(fr_seq(rx_fp));
new_flp = fc_frame_payload_get(fp, sizeof(*flp));
fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
new_flp->fl_cmd = (u8) ELS_LS_ACC;
/*
* Send the response. If this fails, the originator should
* repeat the sequence.
*/
f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
ep = fc_seq_exch(sp);
fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid,
FC_TYPE_ELS, f_ctl, 0);
lport->tt.seq_send(lport, sp, fp);
} else {
fc_lport_error(lport, fp);
}
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
get_unaligned_be64(&flp->fl_wwnn));
out:
sp = fr_seq(rx_fp);
fc_frame_free(rx_fp);
}
/*
* Send new command to target.
*/
static void ft_send_work(struct work_struct *work)
{
struct ft_cmd *cmd = container_of(work, struct ft_cmd, work);
struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame);
struct fcp_cmnd *fcp;
int data_dir = 0;
int task_attr;
fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
if (!fcp)
goto err;
if (fcp->fc_flags & FCP_CFL_LEN_MASK)
goto err; /* not handling longer CDBs yet */
/*
* Check for FCP task management flags
*/
if (fcp->fc_tm_flags) {
ft_send_tm(cmd);
return;
}
switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) {
case 0:
data_dir = DMA_NONE;
break;
case FCP_CFL_RDDATA:
data_dir = DMA_FROM_DEVICE;
break;
case FCP_CFL_WRDATA:
data_dir = DMA_TO_DEVICE;
break;
case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
goto err; /* TBD not supported by tcm_fc yet */
}
/*
* Locate the SAM Task Attr from fc_pri_ta
*/
switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
case FCP_PTA_HEADQ:
task_attr = MSG_HEAD_TAG;
break;
case FCP_PTA_ORDERED:
task_attr = MSG_ORDERED_TAG;
break;
case FCP_PTA_ACA:
task_attr = MSG_ACA_TAG;
break;
case FCP_PTA_SIMPLE: /* Fallthrough */
default:
task_attr = MSG_SIMPLE_TAG;
}
fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
/*
* Use a single se_cmd->cmd_kref as we expect to release se_cmd
* directly from ft_check_stop_free callback in response path.
*/
if (target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb,
&cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
ntohl(fcp->fc_dl), task_attr, data_dir, 0))
goto err;
pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl);
return;
err:
ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID);
}
/*
* Send new command to target.
*/
static void ft_send_cmd(struct ft_cmd *cmd)
{
struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame);
struct se_cmd *se_cmd;
struct fcp_cmnd *fcp;
int data_dir;
u32 data_len;
int task_attr;
int ret;
fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
if (!fcp)
goto err;
if (fcp->fc_flags & FCP_CFL_LEN_MASK)
goto err; /* not handling longer CDBs yet */
if (fcp->fc_tm_flags) {
task_attr = FCP_PTA_SIMPLE;
data_dir = DMA_NONE;
data_len = 0;
} else {
switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) {
case 0:
data_dir = DMA_NONE;
break;
case FCP_CFL_RDDATA:
data_dir = DMA_FROM_DEVICE;
break;
case FCP_CFL_WRDATA:
data_dir = DMA_TO_DEVICE;
break;
case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
goto err; /* TBD not supported by tcm_fc yet */
}
/*
* Locate the SAM Task Attr from fc_pri_ta
*/
switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
case FCP_PTA_HEADQ:
task_attr = MSG_HEAD_TAG;
break;
case FCP_PTA_ORDERED:
task_attr = MSG_ORDERED_TAG;
break;
case FCP_PTA_ACA:
task_attr = MSG_ACA_TAG;
break;
case FCP_PTA_SIMPLE: /* Fallthrough */
default:
task_attr = MSG_SIMPLE_TAG;
}
task_attr = fcp->fc_pri_ta & FCP_PTA_MASK;
data_len = ntohl(fcp->fc_dl);
cmd->cdb = fcp->fc_cdb;
}
se_cmd = &cmd->se_cmd;
/*
* Initialize struct se_cmd descriptor from target_core_mod
* infrastructure
*/
transport_init_se_cmd(se_cmd, &ft_configfs->tf_ops, cmd->sess->se_sess,
data_len, data_dir, task_attr,
&cmd->ft_sense_buffer[0]);
/*
* Check for FCP task management flags
*/
if (fcp->fc_tm_flags) {
ft_send_tm(cmd);
return;
}
fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun);
ret = transport_get_lun_for_cmd(&cmd->se_cmd, NULL, cmd->lun);
if (ret < 0) {
ft_dump_cmd(cmd, __func__);
transport_send_check_condition_and_sense(&cmd->se_cmd,
cmd->se_cmd.scsi_sense_reason, 0);
return;
}
ret = transport_generic_allocate_tasks(se_cmd, cmd->cdb);
FT_IO_DBG("r_ctl %x alloc task ret %d\n", fh->fh_r_ctl, ret);
ft_dump_cmd(cmd, __func__);
if (ret == -1) {
transport_send_check_condition_and_sense(se_cmd,
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
transport_generic_free_cmd(se_cmd, 0, 1, 0);
return;
}
if (ret == -2) {
if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT)
ft_queue_status(se_cmd);
else
transport_send_check_condition_and_sense(se_cmd,
se_cmd->scsi_sense_reason, 0);
transport_generic_free_cmd(se_cmd, 0, 1, 0);
return;
}
transport_generic_handle_cdb(se_cmd);
return;
err:
ft_send_resp_code(cmd, FCP_CMND_FIELDS_INVALID);
return;
}
static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
struct fc_frame *rx_fp,
struct fc_lport *lport)
{
struct fc_frame *fp;
struct fc_frame_header *fh;
struct fc_seq *sp;
struct fc_exch *ep;
struct fc_els_flogi *flp;
struct fc_els_flogi *new_flp;
u64 remote_wwpn;
u32 remote_fid;
u32 local_fid;
u32 f_ctl;
FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
fc_lport_state(lport));
fh = fc_frame_header_get(rx_fp);
remote_fid = ntoh24(fh->fh_s_id);
flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
if (!flp)
goto out;
remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
if (remote_wwpn == lport->wwpn) {
printk(KERN_WARNING "libfc: Received FLOGI from port "
"with same WWPN %llx\n", remote_wwpn);
goto out;
}
FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn);
local_fid = FC_LOCAL_PTP_FID_LO;
if (remote_wwpn < lport->wwpn) {
local_fid = FC_LOCAL_PTP_FID_HI;
if (!remote_fid || remote_fid == local_fid)
remote_fid = FC_LOCAL_PTP_FID_LO;
} else if (!remote_fid) {
remote_fid = FC_LOCAL_PTP_FID_HI;
}
fc_host_port_id(lport->host) = local_fid;
fp = fc_frame_alloc(lport, sizeof(*flp));
if (fp) {
sp = lport->tt.seq_start_next(fr_seq(rx_fp));
new_flp = fc_frame_payload_get(fp, sizeof(*flp));
fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
new_flp->fl_cmd = (u8) ELS_LS_ACC;
f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
ep = fc_seq_exch(sp);
fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
FC_TYPE_ELS, f_ctl, 0);
lport->tt.seq_send(lport, sp, fp);
} else {
fc_lport_error(lport, fp);
}
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
get_unaligned_be64(&flp->fl_wwnn));
out:
sp = fr_seq(rx_fp);
fc_frame_free(rx_fp);
}
/*
* Send response.
*/
int ft_queue_status(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_resp_with_ext *fcp;
struct fc_lport *lport;
struct fc_exch *ep;
size_t len;
int rc;
if (cmd->aborted)
return 0;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
len = sizeof(*fcp) + se_cmd->scsi_sense_length;
fp = fc_frame_alloc(lport, len);
if (!fp) {
se_cmd->scsi_status = SAM_STAT_TASK_SET_FULL;
return -ENOMEM;
}
fcp = fc_frame_payload_get(fp, len);
memset(fcp, 0, len);
fcp->resp.fr_status = se_cmd->scsi_status;
len = se_cmd->scsi_sense_length;
if (len) {
fcp->resp.fr_flags |= FCP_SNS_LEN_VAL;
fcp->ext.fr_sns_len = htonl(len);
memcpy((fcp + 1), se_cmd->sense_buffer, len);
}
/*
* Test underflow and overflow with one mask. Usually both are off.
* Bidirectional commands are not handled yet.
*/
if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) {
if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT)
fcp->resp.fr_flags |= FCP_RESID_OVER;
else
fcp->resp.fr_flags |= FCP_RESID_UNDER;
fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count);
}
/*
* Send response.
*/
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0);
rc = lport->tt.seq_send(lport, cmd->seq, fp);
if (rc) {
pr_info_ratelimited("%s: Failed to send response frame %p, "
"xid <0x%x>\n", __func__, fp, ep->xid);
/*
* Generate a TASK_SET_FULL status to notify the initiator
* to reduce it's queue_depth after the se_cmd response has
* been re-queued by target-core.
*/
se_cmd->scsi_status = SAM_STAT_TASK_SET_FULL;
return -ENOMEM;
}
lport->tt.exch_done(cmd->seq);
return 0;
}