diff options
| -rw-r--r-- | drivers/scsi/fcoe/fcoe.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_lport.c | 267 | ||||
| -rw-r--r-- | include/scsi/libfc.h | 7 |
3 files changed, 278 insertions, 0 deletions
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index f1c126b798af..8f078d306a0a 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -134,6 +134,8 @@ struct fc_function_template fcoe_transport_function = { .vport_delete = fcoe_vport_destroy, .vport_disable = fcoe_vport_disable, .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, + + .bsg_request = fc_lport_bsg_request, }; struct fc_function_template fcoe_vport_transport_function = { @@ -167,6 +169,8 @@ struct fc_function_template fcoe_vport_transport_function = { .issue_fc_host_lip = fcoe_reset, .terminate_rport_io = fc_rport_terminate_io, + + .bsg_request = fc_lport_bsg_request, }; static struct scsi_host_template fcoe_shost_template = { diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index dfea6c572dfb..2162e6b0f43e 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -94,6 +94,7 @@ #include <scsi/libfc.h> #include <scsi/fc_encode.h> +#include <linux/scatterlist.h> #include "fc_libfc.h" @@ -127,6 +128,24 @@ static const char *fc_lport_state_names[] = { [LPORT_ST_RESET] = "reset", }; +/** + * struct fc_bsg_info - FC Passthrough managemet structure + * @job: The passthrough job + * @lport: The local port to pass through a command + * @rsp_code: The expected response code + * @sg: job->reply_payload.sg_list + * @nents: job->reply_payload.sg_cnt + * @offset: The offset into the response data + */ +struct fc_bsg_info { + struct fc_bsg_job *job; + struct fc_lport *lport; + u16 rsp_code; + struct scatterlist *sg; + u32 nents; + size_t offset; +}; + static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp) { fc_frame_free(fp); @@ -1512,3 +1531,251 @@ int fc_lport_init(struct fc_lport *lport) return 0; } EXPORT_SYMBOL(fc_lport_init); + +/** + * fc_lport_bsg_resp() - The common response handler for fc pass-thru requests + * @sp: current sequence in the fc pass-thru request exchange + * @fp: received response frame + * @info_arg: pointer to struct fc_bsg_info + */ +static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp, + void *info_arg) +{ + struct fc_bsg_info *info = info_arg; + struct fc_bsg_job *job = info->job; + struct fc_lport *lport = info->lport; + struct fc_frame_header *fh; + size_t len; + void *buf; + + if (IS_ERR(fp)) { + job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ? + -ECONNABORTED : -ETIMEDOUT; + job->reply_len = sizeof(uint32_t); + job->state_flags |= FC_RQST_STATE_DONE; + job->job_done(job); + kfree(info); + return; + } + + mutex_lock(&lport->lp_mutex); + fh = fc_frame_header_get(fp); + len = fr_len(fp) - sizeof(*fh); + buf = fc_frame_payload_get(fp, 0); + + if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) { + /* Get the response code from the first frame payload */ + unsigned short cmd = (info->rsp_code == FC_FS_ACC) ? + ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) : + (unsigned short)fc_frame_payload_op(fp); + + /* Save the reply status of the job */ + job->reply->reply_data.ctels_reply.status = + (cmd == info->rsp_code) ? + FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT; + } + + job->reply->reply_payload_rcv_len += + fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents, + &info->offset, KM_BIO_SRC_IRQ, NULL); + + if (fr_eof(fp) == FC_EOF_T && + (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) == + (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) { + if (job->reply->reply_payload_rcv_len > + job->reply_payload.payload_len) + job->reply->reply_payload_rcv_len = + job->reply_payload.payload_len; + job->reply->result = 0; + job->state_flags |= FC_RQST_STATE_DONE; + job->job_done(job); + kfree(info); + } + fc_frame_free(fp); + mutex_unlock(&lport->lp_mutex); +} + +/** + * fc_lport_els_request() - Send ELS pass-thru request + * @job: The bsg fc pass-thru job structure + * @lport: The local port sending the request + * @did: The destination port id. + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static int fc_lport_els_request(struct fc_bsg_job *job, + struct fc_lport *lport, + u32 did, u32 tov) +{ + struct fc_bsg_info *info; + struct fc_frame *fp; + struct fc_frame_header *fh; + char *pp; + int len; + + fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) + + job->request_payload.payload_len); + if (!fp) + return -ENOMEM; + + len = job->request_payload.payload_len; + pp = fc_frame_payload_get(fp, len); + + sg_copy_to_buffer(job->request_payload.sg_list, + job->request_payload.sg_cnt, + pp, len); + + fh = fc_frame_header_get(fp); + fh->fh_r_ctl = FC_RCTL_ELS_REQ; + hton24(fh->fh_d_id, did); + hton24(fh->fh_s_id, fc_host_port_id(lport->host)); + fh->fh_type = FC_TYPE_ELS; + hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | + FC_FC_END_SEQ | FC_FC_SEQ_INIT); + fh->fh_cs_ctl = 0; + fh->fh_df_ctl = 0; + fh->fh_parm_offset = 0; + + info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); + if (!info) { + fc_frame_free(fp); + return -ENOMEM; + } + + info->job = job; + info->lport = lport; + info->rsp_code = ELS_LS_ACC; + info->nents = job->reply_payload.sg_cnt; + info->sg = job->reply_payload.sg_list; + + if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, + NULL, info, tov)) + return -ECOMM; + return 0; +} + +/** + * fc_lport_ct_request() - Send CT pass-thru request + * @job: The bsg fc pass-thru job structure + * @lport: The local port sending the request + * @did: The destination FC-ID + * @tov: The time to wait for a response + * + * Locking Note: The lport lock is expected to be held before calling + * this routine. + */ +static int fc_lport_ct_request(struct fc_bsg_job *job, + struct fc_lport *lport, u32 did, u32 tov) +{ + struct fc_bsg_info *info; + struct fc_frame *fp; + struct fc_frame_header *fh; + struct fc_ct_req *ct; + size_t len; + + fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) + + job->request_payload.payload_len); + if (!fp) + return -ENOMEM; + + len = job->request_payload.payload_len; + ct = fc_frame_payload_get(fp, len); + + sg_copy_to_buffer(job->request_payload.sg_list, + job->request_payload.sg_cnt, + ct, len); + + fh = fc_frame_header_get(fp); + fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL; + hton24(fh->fh_d_id, did); + hton24(fh->fh_s_id, fc_host_port_id(lport->host)); + fh->fh_type = FC_TYPE_CT; + hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ | + FC_FC_END_SEQ | FC_FC_SEQ_INIT); + fh->fh_cs_ctl = 0; + fh->fh_df_ctl = 0; + fh->fh_parm_offset = 0; + + info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL); + if (!info) { + fc_frame_free(fp); + return -ENOMEM; + } + + info->job = job; + info->lport = lport; + info->rsp_code = FC_FS_ACC; + info->nents = job->reply_payload.sg_cnt; + info->sg = job->reply_payload.sg_list; + + if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp, + NULL, info, tov)) + return -ECOMM; + return 0; +} + +/** + * fc_lport_bsg_request() - The common entry point for sending + * fc pass-thru requests + * @job: The fc pass-thru job structure + */ +int fc_lport_bsg_request(struct fc_bsg_job *job) +{ + struct request *rsp = job->req->next_rq; + struct Scsi_Host *shost = job->shost; + struct fc_lport *lport = shost_priv(shost); + struct fc_rport *rport; + struct fc_rport_priv *rdata; + int rc = -EINVAL; + u32 did; + + job->reply->reply_payload_rcv_len = 0; + rsp->resid_len = job->reply_payload.payload_len; + + mutex_lock(&lport->lp_mutex); + + switch (job->request->msgcode) { + case FC_BSG_RPT_ELS: + rport = job->rport; + if (!rport) + break; + + rdata = rport->dd_data; + rc = fc_lport_els_request(job, lport, rport->port_id, + rdata->e_d_tov); + break; + + case FC_BSG_RPT_CT: + rport = job->rport; + if (!rport) + break; + + rdata = rport->dd_data; + rc = fc_lport_ct_request(job, lport, rport->port_id, + rdata->e_d_tov); + break; + + case FC_BSG_HST_CT: + did = ntoh24(job->request->rqst_data.h_ct.port_id); + if (did == FC_FID_DIR_SERV) + rdata = lport->dns_rp; + else + rdata = lport->tt.rport_lookup(lport, did); + + if (!rdata) + break; + + rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov); + break; + + case FC_BSG_HST_ELS_NOLOGIN: + did = ntoh24(job->request->rqst_data.h_els.port_id); + rc = fc_lport_els_request(job, lport, did, lport->e_d_tov); + break; + } + + mutex_unlock(&lport->lp_mutex); + return rc; +} +EXPORT_SYMBOL(fc_lport_bsg_request); diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h index 8258edfa328c..54df9fe00c14 100644 --- a/include/scsi/libfc.h +++ b/include/scsi/libfc.h @@ -26,6 +26,7 @@ #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_fc.h> +#include <scsi/scsi_bsg_fc.h> #include <scsi/fc/fc_fcp.h> #include <scsi/fc/fc_ns.h> @@ -831,6 +832,12 @@ void fc_vport_setlink(struct fc_lport *vn_port); void fc_vports_linkchange(struct fc_lport *n_port); /* + * Issue fc pass-thru request via bsg interface + */ +int fc_lport_bsg_request(struct fc_bsg_job *job); + + +/* * REMOTE PORT LAYER *****************************/ int fc_rport_init(struct fc_lport *lp); |