#include "zfcp_ext.h"
+struct ct_iu_gpn_ft_req {
+ struct ct_hdr header;
+ u8 flags;
+ u8 domain_id_scope;
+ u8 area_id_scope;
+ u8 fc4_type;
+} __attribute__ ((packed));
+
+struct gpn_ft_resp_acc {
+ u8 control;
+ u8 port_id[3];
+ u8 reserved[4];
+ u64 wwpn;
+} __attribute__ ((packed));
+
+#define ZFCP_GPN_FT_ENTRIES ((PAGE_SIZE - sizeof(struct ct_hdr)) \
+ / sizeof(struct gpn_ft_resp_acc))
+#define ZFCP_GPN_FT_BUFFERS 4
+#define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1)
+
+struct ct_iu_gpn_ft_resp {
+ struct ct_hdr header;
+ struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES];
+} __attribute__ ((packed));
+
+struct zfcp_gpn_ft {
+ struct zfcp_send_ct ct;
+ struct scatterlist sg_req;
+ struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
+};
+
static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
struct fcp_rscn_element *elem)
{
u16 no_entries;
u32 range_mask;
- fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
- fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
+ fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data;
+ fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head;
/* see FC-FS */
no_entries = fcp_rscn_head->payload_len /
}
_zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element);
}
+ schedule_work(&fsf_req->adapter->scan_work);
}
static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, wwn_t wwpn)
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)req->data;
struct fsf_plogi *els_plogi =
- (struct fsf_plogi *) status_buffer->payload;
+ (struct fsf_plogi *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
}
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *)req->data;
- struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
+ struct fcp_logo *els_logo =
+ (struct fcp_logo *) status_buffer->payload.data;
zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
}
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *) fsf_req->data;
- unsigned int els_type = status_buffer->payload[0];
+ unsigned int els_type = status_buffer->payload.data[0];
zfcp_san_dbf_event_incoming_els(fsf_req);
if (els_type == LS_PLOGI)
struct zfcp_port *port = adisc->els.port;
struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc;
- if (!adisc->els.status) {
+ if (adisc->els.status) {
/* request rejected or timed out */
zfcp_erp_port_forced_reopen(port, 0, 63, NULL);
goto out;
zfcp_port_get(port);
retval = zfcp_fc_adisc(port);
- if (retval == 0 || retval == -EBUSY)
+ if (retval == 0)
return;
/* send of ADISC was not possible */
zfcp_port_put(port);
- zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
+ if (retval != -EBUSY)
+ zfcp_erp_port_forced_reopen(port, 0, 65, NULL);
+}
+
+static int zfcp_scan_get_nameserver(struct zfcp_adapter *adapter)
+{
+ int ret;
+
+ if (!adapter->nameserver_port)
+ return -EINTR;
+
+ if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
+ &adapter->nameserver_port->status)) {
+ ret = zfcp_erp_port_reopen(adapter->nameserver_port, 0, 148,
+ NULL);
+ if (ret)
+ return ret;
+ zfcp_erp_wait(adapter);
+ }
+ return !atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
+ &adapter->nameserver_port->status);
+}
+
+static void zfcp_gpn_ft_handler(unsigned long _done)
+{
+ complete((struct completion *)_done);
+}
+
+static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft)
+{
+ struct scatterlist *sg = &gpn_ft->sg_req;
+
+ kfree(sg_virt(sg)); /* free request buffer */
+ zfcp_sg_free_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS);
+
+ kfree(gpn_ft);
+}
+
+static struct zfcp_gpn_ft *zfcp_alloc_sg_env(void)
+{
+ struct zfcp_gpn_ft *gpn_ft;
+ struct ct_iu_gpn_ft_req *req;
+
+ gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL);
+ if (!gpn_ft)
+ return NULL;
+
+ req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL);
+ if (!req) {
+ kfree(gpn_ft);
+ gpn_ft = NULL;
+ goto out;
+ }
+ sg_init_one(&gpn_ft->sg_req, req, sizeof(*req));
+
+ if (zfcp_sg_setup_table(gpn_ft->sg_resp, ZFCP_GPN_FT_BUFFERS)) {
+ zfcp_free_sg_env(gpn_ft);
+ gpn_ft = NULL;
+ }
+out:
+ return gpn_ft;
+}
+
+
+static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
+ struct zfcp_adapter *adapter)
+{
+ struct zfcp_send_ct *ct = &gpn_ft->ct;
+ struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
+ struct completion done;
+ int ret;
+
+ /* prepare CT IU for GPN_FT */
+ req->header.revision = ZFCP_CT_REVISION;
+ req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
+ req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
+ req->header.options = ZFCP_CT_SYNCHRONOUS;
+ req->header.cmd_rsp_code = ZFCP_CT_GPN_FT;
+ req->header.max_res_size = (sizeof(struct gpn_ft_resp_acc) *
+ (ZFCP_GPN_FT_MAX_ENTRIES - 1)) >> 2;
+ req->flags = 0;
+ req->domain_id_scope = 0;
+ req->area_id_scope = 0;
+ req->fc4_type = ZFCP_CT_SCSI_FCP;
+
+ /* prepare zfcp_send_ct */
+ ct->port = adapter->nameserver_port;
+ ct->handler = zfcp_gpn_ft_handler;
+ ct->handler_data = (unsigned long)&done;
+ ct->timeout = 10;
+ ct->req = &gpn_ft->sg_req;
+ ct->resp = gpn_ft->sg_resp;
+ ct->req_count = 1;
+ ct->resp_count = ZFCP_GPN_FT_BUFFERS;
+
+ init_completion(&done);
+ ret = zfcp_fsf_send_ct(ct, NULL, NULL);
+ if (!ret)
+ wait_for_completion(&done);
+ return ret;
+}
+
+static void zfcp_validate_port(struct zfcp_port *port)
+{
+ struct zfcp_adapter *adapter = port->adapter;
+
+ atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status);
+
+ if (port == adapter->nameserver_port)
+ return;
+ if ((port->supported_classes != 0) || (port->units != 0)) {
+ zfcp_port_put(port);
+ return;
+ }
+ zfcp_erp_port_shutdown(port, 0, 151, NULL);
+ zfcp_erp_wait(adapter);
+ zfcp_port_put(port);
+ zfcp_port_dequeue(port);
+}
+
+static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
+{
+ struct zfcp_send_ct *ct = &gpn_ft->ct;
+ struct scatterlist *sg = gpn_ft->sg_resp;
+ struct ct_hdr *hdr = sg_virt(sg);
+ struct gpn_ft_resp_acc *acc = sg_virt(sg);
+ struct zfcp_adapter *adapter = ct->port->adapter;
+ struct zfcp_port *port, *tmp;
+ u32 d_id;
+ int ret = 0, x, last = 0;
+
+ if (ct->status)
+ return -EIO;
+
+ if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) {
+ if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD)
+ return -EAGAIN; /* might be a temporary condition */
+ return -EIO;
+ }
+
+ if (hdr->max_res_size)
+ return -E2BIG;
+
+ down(&zfcp_data.config_sema);
+
+ /* first entry is the header */
+ for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) {
+ if (x % (ZFCP_GPN_FT_ENTRIES + 1))
+ acc++;
+ else
+ acc = sg_virt(++sg);
+
+ last = acc->control & 0x80;
+ d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 |
+ acc->port_id[2];
+
+ /* skip the adapter's port and known remote ports */
+ if (acc->wwpn == fc_host_port_name(adapter->scsi_host))
+ continue;
+ port = zfcp_get_port_by_wwpn(adapter, acc->wwpn);
+ if (port) {
+ zfcp_port_get(port);
+ continue;
+ }
+
+ port = zfcp_port_enqueue(adapter, acc->wwpn,
+ ZFCP_STATUS_PORT_DID_DID |
+ ZFCP_STATUS_COMMON_NOESC, d_id);
+ if (IS_ERR(port))
+ ret = PTR_ERR(port);
+ else
+ zfcp_erp_port_reopen(port, 0, 149, NULL);
+ }
+
+ zfcp_erp_wait(adapter);
+ list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
+ zfcp_validate_port(port);
+ up(&zfcp_data.config_sema);
+ return ret;
+}
+
+/**
+ * zfcp_scan_ports - scan remote ports and attach new ports
+ * @adapter: pointer to struct zfcp_adapter
+ */
+int zfcp_scan_ports(struct zfcp_adapter *adapter)
+{
+ int ret, i;
+ struct zfcp_gpn_ft *gpn_ft;
+
+ zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */
+ if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT)
+ return 0;
+
+ ret = zfcp_scan_get_nameserver(adapter);
+ if (ret)
+ return ret;
+
+ gpn_ft = zfcp_alloc_sg_env();
+ if (!gpn_ft)
+ return -ENOMEM;
+
+ for (i = 0; i < 3; i++) {
+ ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter);
+ if (!ret) {
+ ret = zfcp_scan_eval_gpn_ft(gpn_ft);
+ if (ret == -EAGAIN)
+ ssleep(1);
+ else
+ break;
+ }
+ }
+ zfcp_free_sg_env(gpn_ft);
+
+ return ret;
+}
+
+
+void _zfcp_scan_ports_later(struct work_struct *work)
+{
+ zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work));
}
projects / linux-2.6-omap-h63xx.git / blobdiff