linux_dsm_epyc7002/drivers/s390/scsi/zfcp_fc.c
Christof Schmitt 98fc4d5c8c [SCSI] zfcp: Simplify and update ct/gs and els timeout handling
The recommendation for a timeout of 2 * R_A_TOV is the same for ct/gs
and els requests, so set it in the common function used for
initializing both request types. Besides, the timer inside zfcp should
only run longer than the timeout set for the channel, so 10 seconds
more should be enough (instead of 60 seconds).

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-09-05 08:49:38 -05:00

883 lines
23 KiB
C

/*
* zfcp device driver
*
* Fibre Channel related functions for the zfcp device driver.
*
* Copyright IBM Corporation 2008, 2009
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include "zfcp_ext.h"
enum rscn_address_format {
RSCN_PORT_ADDRESS = 0x0,
RSCN_AREA_ADDRESS = 0x1,
RSCN_DOMAIN_ADDRESS = 0x2,
RSCN_FABRIC_ADDRESS = 0x3,
};
static u32 rscn_range_mask[] = {
[RSCN_PORT_ADDRESS] = 0xFFFFFF,
[RSCN_AREA_ADDRESS] = 0xFFFF00,
[RSCN_DOMAIN_ADDRESS] = 0xFF0000,
[RSCN_FABRIC_ADDRESS] = 0x000000,
};
struct gpn_ft_resp_acc {
u8 control;
u8 port_id[3];
u8 reserved[4];
u64 wwpn;
} __attribute__ ((packed));
#define ZFCP_CT_SIZE_ONE_PAGE (PAGE_SIZE - sizeof(struct ct_hdr))
#define ZFCP_GPN_FT_ENTRIES (ZFCP_CT_SIZE_ONE_PAGE \
/ sizeof(struct gpn_ft_resp_acc))
#define ZFCP_GPN_FT_BUFFERS 4
#define ZFCP_GPN_FT_MAX_SIZE (ZFCP_GPN_FT_BUFFERS * PAGE_SIZE \
- sizeof(struct ct_hdr))
#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];
};
struct zfcp_fc_ns_handler_data {
struct completion done;
void (*handler)(unsigned long);
unsigned long handler_data;
};
static int zfcp_fc_wka_port_get(struct zfcp_wka_port *wka_port)
{
if (mutex_lock_interruptible(&wka_port->mutex))
return -ERESTARTSYS;
if (wka_port->status == ZFCP_WKA_PORT_OFFLINE ||
wka_port->status == ZFCP_WKA_PORT_CLOSING) {
wka_port->status = ZFCP_WKA_PORT_OPENING;
if (zfcp_fsf_open_wka_port(wka_port))
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
}
mutex_unlock(&wka_port->mutex);
wait_event(wka_port->completion_wq,
wka_port->status == ZFCP_WKA_PORT_ONLINE ||
wka_port->status == ZFCP_WKA_PORT_OFFLINE);
if (wka_port->status == ZFCP_WKA_PORT_ONLINE) {
atomic_inc(&wka_port->refcount);
return 0;
}
return -EIO;
}
static void zfcp_fc_wka_port_offline(struct work_struct *work)
{
struct delayed_work *dw = to_delayed_work(work);
struct zfcp_wka_port *wka_port =
container_of(dw, struct zfcp_wka_port, work);
mutex_lock(&wka_port->mutex);
if ((atomic_read(&wka_port->refcount) != 0) ||
(wka_port->status != ZFCP_WKA_PORT_ONLINE))
goto out;
wka_port->status = ZFCP_WKA_PORT_CLOSING;
if (zfcp_fsf_close_wka_port(wka_port)) {
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
wake_up(&wka_port->completion_wq);
}
out:
mutex_unlock(&wka_port->mutex);
}
static void zfcp_fc_wka_port_put(struct zfcp_wka_port *wka_port)
{
if (atomic_dec_return(&wka_port->refcount) != 0)
return;
/* wait 10 milliseconds, other reqs might pop in */
schedule_delayed_work(&wka_port->work, HZ / 100);
}
static void zfcp_fc_wka_port_init(struct zfcp_wka_port *wka_port, u32 d_id,
struct zfcp_adapter *adapter)
{
init_waitqueue_head(&wka_port->completion_wq);
wka_port->adapter = adapter;
wka_port->d_id = d_id;
wka_port->status = ZFCP_WKA_PORT_OFFLINE;
atomic_set(&wka_port->refcount, 0);
mutex_init(&wka_port->mutex);
INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
}
static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka)
{
cancel_delayed_work_sync(&wka->work);
mutex_lock(&wka->mutex);
wka->status = ZFCP_WKA_PORT_OFFLINE;
mutex_unlock(&wka->mutex);
}
void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs)
{
zfcp_fc_wka_port_force_offline(&gs->ms);
zfcp_fc_wka_port_force_offline(&gs->ts);
zfcp_fc_wka_port_force_offline(&gs->ds);
zfcp_fc_wka_port_force_offline(&gs->as);
zfcp_fc_wka_port_force_offline(&gs->ks);
}
static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
struct fcp_rscn_element *elem)
{
unsigned long flags;
struct zfcp_port *port;
read_lock_irqsave(&zfcp_data.config_lock, flags);
list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) {
if ((port->d_id & range) == (elem->nport_did & range))
zfcp_fc_test_link(port);
if (!port->d_id)
zfcp_erp_port_reopen(port,
ZFCP_STATUS_COMMON_ERP_FAILED,
"fcrscn1", NULL);
}
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
}
static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
struct fcp_rscn_head *fcp_rscn_head;
struct fcp_rscn_element *fcp_rscn_element;
u16 i;
u16 no_entries;
u32 range_mask;
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 /
sizeof(struct fcp_rscn_element);
for (i = 1; i < no_entries; i++) {
/* skip head and start with 1st element */
fcp_rscn_element++;
range_mask = rscn_range_mask[fcp_rscn_element->addr_format];
_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, u64 wwpn)
{
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_port *port;
unsigned long flags;
read_lock_irqsave(&zfcp_data.config_lock, flags);
list_for_each_entry(port, &adapter->port_list_head, list)
if (port->wwpn == wwpn)
break;
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
if (port && (port->wwpn == wwpn))
zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req);
}
static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
{
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.data;
zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
}
static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
{
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.data;
zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
}
/**
* zfcp_fc_incoming_els - handle incoming ELS
* @fsf_req - request which contains incoming ELS
*/
void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
{
struct fsf_status_read_buffer *status_buffer =
(struct fsf_status_read_buffer *) fsf_req->data;
unsigned int els_type = status_buffer->payload.data[0];
zfcp_dbf_san_incoming_els(fsf_req);
if (els_type == LS_PLOGI)
zfcp_fc_incoming_plogi(fsf_req);
else if (els_type == LS_LOGO)
zfcp_fc_incoming_logo(fsf_req);
else if (els_type == LS_RSCN)
zfcp_fc_incoming_rscn(fsf_req);
}
static void zfcp_fc_ns_handler(unsigned long data)
{
struct zfcp_fc_ns_handler_data *compl_rec =
(struct zfcp_fc_ns_handler_data *) data;
if (compl_rec->handler)
compl_rec->handler(compl_rec->handler_data);
complete(&compl_rec->done);
}
static void zfcp_fc_ns_gid_pn_eval(unsigned long data)
{
struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data;
struct zfcp_send_ct *ct = &gid_pn->ct;
struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req);
struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp);
struct zfcp_port *port = gid_pn->port;
if (ct->status)
return;
if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT)
return;
/* paranoia */
if (ct_iu_req->wwpn != port->wwpn)
return;
/* looks like a valid d_id */
port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
}
static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
struct zfcp_gid_pn_data *gid_pn)
{
struct zfcp_adapter *adapter = port->adapter;
struct zfcp_fc_ns_handler_data compl_rec;
int ret;
/* setup parameters for send generic command */
gid_pn->port = port;
gid_pn->ct.wka_port = &adapter->gs->ds;
gid_pn->ct.handler = zfcp_fc_ns_handler;
gid_pn->ct.handler_data = (unsigned long) &compl_rec;
gid_pn->ct.req = &gid_pn->req;
gid_pn->ct.resp = &gid_pn->resp;
sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req,
sizeof(struct ct_iu_gid_pn_req));
sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp,
sizeof(struct ct_iu_gid_pn_resp));
/* setup nameserver request */
gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION;
gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER;
gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS;
gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN;
gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4;
gid_pn->ct_iu_req.wwpn = port->wwpn;
init_completion(&compl_rec.done);
compl_rec.handler = zfcp_fc_ns_gid_pn_eval;
compl_rec.handler_data = (unsigned long) gid_pn;
ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req);
if (!ret)
wait_for_completion(&compl_rec.done);
return ret;
}
/**
* zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request
* @port: port where GID_PN request is needed
* return: -ENOMEM on error, 0 otherwise
*/
static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
{
int ret;
struct zfcp_gid_pn_data *gid_pn;
struct zfcp_adapter *adapter = port->adapter;
gid_pn = mempool_alloc(adapter->pool.gid_pn_data, GFP_ATOMIC);
if (!gid_pn)
return -ENOMEM;
memset(gid_pn, 0, sizeof(*gid_pn));
ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
if (ret)
goto out;
ret = zfcp_fc_ns_gid_pn_request(port, gid_pn);
zfcp_fc_wka_port_put(&adapter->gs->ds);
out:
mempool_free(gid_pn, adapter->pool.gid_pn_data);
return ret;
}
void zfcp_fc_port_did_lookup(struct work_struct *work)
{
int ret;
struct zfcp_port *port = container_of(work, struct zfcp_port,
gid_pn_work);
ret = zfcp_fc_ns_gid_pn(port);
if (ret) {
/* could not issue gid_pn for some reason */
zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL);
goto out;
}
if (!port->d_id) {
zfcp_erp_port_failed(port, "fcgpn_2", NULL);
goto out;
}
zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL);
out:
zfcp_port_put(port);
}
/**
* zfcp_fc_plogi_evaluate - evaluate PLOGI playload
* @port: zfcp_port structure
* @plogi: plogi payload
*
* Evaluate PLOGI playload and copy important fields into zfcp_port structure
*/
void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
{
port->maxframe_size = plogi->serv_param.common_serv_param[7] |
((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
if (plogi->serv_param.class1_serv_param[0] & 0x80)
port->supported_classes |= FC_COS_CLASS1;
if (plogi->serv_param.class2_serv_param[0] & 0x80)
port->supported_classes |= FC_COS_CLASS2;
if (plogi->serv_param.class3_serv_param[0] & 0x80)
port->supported_classes |= FC_COS_CLASS3;
if (plogi->serv_param.class4_serv_param[0] & 0x80)
port->supported_classes |= FC_COS_CLASS4;
}
struct zfcp_els_adisc {
struct zfcp_send_els els;
struct scatterlist req;
struct scatterlist resp;
struct zfcp_ls_adisc ls_adisc;
struct zfcp_ls_adisc ls_adisc_acc;
};
static void zfcp_fc_adisc_handler(unsigned long data)
{
struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data;
struct zfcp_port *port = adisc->els.port;
struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc;
if (adisc->els.status) {
/* request rejected or timed out */
zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
"fcadh_1", NULL);
goto out;
}
if (!port->wwnn)
port->wwnn = ls_adisc->wwnn;
if ((port->wwpn != ls_adisc->wwpn) ||
!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
"fcadh_2", NULL);
goto out;
}
/* port is good, unblock rport without going through erp */
zfcp_scsi_schedule_rport_register(port);
out:
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
zfcp_port_put(port);
kfree(adisc);
}
static int zfcp_fc_adisc(struct zfcp_port *port)
{
struct zfcp_els_adisc *adisc;
struct zfcp_adapter *adapter = port->adapter;
adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC);
if (!adisc)
return -ENOMEM;
adisc->els.req = &adisc->req;
adisc->els.resp = &adisc->resp;
sg_init_one(adisc->els.req, &adisc->ls_adisc,
sizeof(struct zfcp_ls_adisc));
sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc,
sizeof(struct zfcp_ls_adisc));
adisc->els.adapter = adapter;
adisc->els.port = port;
adisc->els.d_id = port->d_id;
adisc->els.handler = zfcp_fc_adisc_handler;
adisc->els.handler_data = (unsigned long) adisc;
adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC;
/* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
without FC-AL-2 capability, so we don't set it */
adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host);
adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host);
adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host);
return zfcp_fsf_send_els(&adisc->els);
}
void zfcp_fc_link_test_work(struct work_struct *work)
{
struct zfcp_port *port =
container_of(work, struct zfcp_port, test_link_work);
int retval;
zfcp_port_get(port);
port->rport_task = RPORT_DEL;
zfcp_scsi_rport_work(&port->rport_work);
/* only issue one test command at one time per port */
if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
goto out;
atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
retval = zfcp_fc_adisc(port);
if (retval == 0)
return;
/* send of ADISC was not possible */
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL);
out:
zfcp_port_put(port);
}
/**
* zfcp_fc_test_link - lightweight link test procedure
* @port: port to be tested
*
* Test status of a link to a remote port using the ELS command ADISC.
* If there is a problem with the remote port, error recovery steps
* will be triggered.
*/
void zfcp_fc_test_link(struct zfcp_port *port)
{
zfcp_port_get(port);
if (!queue_work(port->adapter->work_queue, &port->test_link_work))
zfcp_port_put(port);
}
static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num)
{
struct scatterlist *sg = &gpn_ft->sg_req;
kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg));
zfcp_sg_free_table(gpn_ft->sg_resp, buf_num);
kfree(gpn_ft);
}
static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num)
{
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 = kmem_cache_alloc(zfcp_data.gpn_ft_cache, 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, buf_num)) {
zfcp_free_sg_env(gpn_ft, buf_num);
gpn_ft = NULL;
}
out:
return gpn_ft;
}
static int zfcp_fc_send_gpn_ft(struct zfcp_gpn_ft *gpn_ft,
struct zfcp_adapter *adapter, int max_bytes)
{
struct zfcp_send_ct *ct = &gpn_ft->ct;
struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req);
struct zfcp_fc_ns_handler_data compl_rec;
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 = max_bytes / 4;
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->wka_port = &adapter->gs->ds;
ct->handler = zfcp_fc_ns_handler;
ct->handler_data = (unsigned long)&compl_rec;
ct->req = &gpn_ft->sg_req;
ct->resp = gpn_ft->sg_resp;
init_completion(&compl_rec.done);
compl_rec.handler = NULL;
ret = zfcp_fsf_send_ct(ct, NULL);
if (!ret)
wait_for_completion(&compl_rec.done);
return ret;
}
static void zfcp_fc_validate_port(struct zfcp_port *port)
{
struct zfcp_adapter *adapter = port->adapter;
if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
return;
atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status);
if ((port->supported_classes != 0) ||
!list_empty(&port->unit_list_head)) {
zfcp_port_put(port);
return;
}
zfcp_erp_port_shutdown(port, 0, "fcpval1", NULL);
zfcp_erp_wait(adapter);
zfcp_port_put(port);
zfcp_port_dequeue(port);
}
static int zfcp_fc_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries)
{
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->wka_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) {
dev_warn(&adapter->ccw_device->dev,
"The name server reported %d words residual data\n",
hdr->max_res_size);
return -E2BIG;
}
down(&zfcp_data.config_sema);
/* first entry is the header */
for (x = 1; x < 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];
/* don't attach ports with a well known address */
if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA)
continue;
/* 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)
continue;
port = zfcp_port_enqueue(adapter, acc->wwpn,
ZFCP_STATUS_COMMON_NOESC, d_id);
if (IS_ERR(port))
ret = PTR_ERR(port);
else
zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL);
}
zfcp_erp_wait(adapter);
list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list)
zfcp_fc_validate_port(port);
up(&zfcp_data.config_sema);
return ret;
}
/**
* zfcp_fc_scan_ports - scan remote ports and attach new ports
* @adapter: pointer to struct zfcp_adapter
*/
int zfcp_fc_scan_ports(struct zfcp_adapter *adapter)
{
int ret, i;
struct zfcp_gpn_ft *gpn_ft;
int chain, max_entries, buf_num, max_bytes;
chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1;
max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES;
max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE;
if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
return 0;
ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
if (ret)
return ret;
gpn_ft = zfcp_alloc_sg_env(buf_num);
if (!gpn_ft) {
ret = -ENOMEM;
goto out;
}
for (i = 0; i < 3; i++) {
ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes);
if (!ret) {
ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries);
if (ret == -EAGAIN)
ssleep(1);
else
break;
}
}
zfcp_free_sg_env(gpn_ft, buf_num);
out:
zfcp_fc_wka_port_put(&adapter->gs->ds);
return ret;
}
void _zfcp_fc_scan_ports_later(struct work_struct *work)
{
zfcp_fc_scan_ports(container_of(work, struct zfcp_adapter, scan_work));
}
struct zfcp_els_fc_job {
struct zfcp_send_els els;
struct fc_bsg_job *job;
};
static void zfcp_fc_generic_els_handler(unsigned long data)
{
struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data;
struct fc_bsg_job *job = els_fc_job->job;
struct fc_bsg_reply *reply = job->reply;
if (els_fc_job->els.status) {
/* request rejected or timed out */
reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT;
goto out;
}
reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
reply->reply_payload_rcv_len = job->reply_payload.payload_len;
out:
job->state_flags = FC_RQST_STATE_DONE;
job->job_done(job);
kfree(els_fc_job);
}
int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job)
{
struct zfcp_els_fc_job *els_fc_job;
struct fc_rport *rport = job->rport;
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_port *port;
u8 *port_did;
shost = rport ? rport_to_shost(rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL);
if (!els_fc_job)
return -ENOMEM;
els_fc_job->els.adapter = adapter;
if (rport) {
read_lock_irq(&zfcp_data.config_lock);
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
if (port)
els_fc_job->els.d_id = port->d_id;
read_unlock_irq(&zfcp_data.config_lock);
if (!port) {
kfree(els_fc_job);
return -EINVAL;
}
} else {
port_did = job->request->rqst_data.h_els.port_id;
els_fc_job->els.d_id = (port_did[0] << 16) +
(port_did[1] << 8) + port_did[2];
}
els_fc_job->els.req = job->request_payload.sg_list;
els_fc_job->els.resp = job->reply_payload.sg_list;
els_fc_job->els.handler = zfcp_fc_generic_els_handler;
els_fc_job->els.handler_data = (unsigned long) els_fc_job;
els_fc_job->job = job;
return zfcp_fsf_send_els(&els_fc_job->els);
}
struct zfcp_ct_fc_job {
struct zfcp_send_ct ct;
struct fc_bsg_job *job;
};
static void zfcp_fc_generic_ct_handler(unsigned long data)
{
struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data;
struct fc_bsg_job *job = ct_fc_job->job;
job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ?
FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK;
job->reply->reply_payload_rcv_len = job->reply_payload.payload_len;
job->state_flags = FC_RQST_STATE_DONE;
job->job_done(job);
zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
kfree(ct_fc_job);
}
int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job)
{
int ret;
u8 gs_type;
struct fc_rport *rport = job->rport;
struct Scsi_Host *shost;
struct zfcp_adapter *adapter;
struct zfcp_ct_fc_job *ct_fc_job;
u32 preamble_word1;
shost = rport ? rport_to_shost(rport) : job->shost;
adapter = (struct zfcp_adapter *)shost->hostdata[0];
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
return -EINVAL;
ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL);
if (!ct_fc_job)
return -ENOMEM;
preamble_word1 = job->request->rqst_data.r_ct.preamble_word1;
gs_type = (preamble_word1 & 0xff000000) >> 24;
switch (gs_type) {
case FC_FST_ALIAS:
ct_fc_job->ct.wka_port = &adapter->gs->as;
break;
case FC_FST_MGMT:
ct_fc_job->ct.wka_port = &adapter->gs->ms;
break;
case FC_FST_TIME:
ct_fc_job->ct.wka_port = &adapter->gs->ts;
break;
case FC_FST_DIR:
ct_fc_job->ct.wka_port = &adapter->gs->ds;
break;
default:
kfree(ct_fc_job);
return -EINVAL; /* no such service */
}
ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port);
if (ret) {
kfree(ct_fc_job);
return ret;
}
ct_fc_job->ct.req = job->request_payload.sg_list;
ct_fc_job->ct.resp = job->reply_payload.sg_list;
ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler;
ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job;
ct_fc_job->ct.completion = NULL;
ct_fc_job->job = job;
ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL);
if (ret) {
kfree(ct_fc_job);
zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port);
}
return ret;
}
int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
{
struct zfcp_wka_ports *wka_ports;
wka_ports = kzalloc(sizeof(struct zfcp_wka_ports), GFP_KERNEL);
if (!wka_ports)
return -ENOMEM;
adapter->gs = wka_ports;
zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
zfcp_fc_wka_port_init(&wka_ports->ks, FC_FID_SEC_KEY, adapter);
return 0;
}
void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)
{
kfree(adapter->gs);
adapter->gs = NULL;
}