| /* |
| * FiberChannel transport specific attributes exported to sysfs. |
| * |
| * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * ======== |
| * |
| * Copyright (C) 2004-2007 James Smart, Emulex Corporation |
| * Rewrite for host, target, device, and remote port attributes, |
| * statistics, and service functions... |
| * Add vports, etc |
| * |
| */ |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_transport.h> |
| #include <scsi/scsi_transport_fc.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <linux/netlink.h> |
| #include <net/netlink.h> |
| #include <scsi/scsi_netlink_fc.h> |
| #include <scsi/scsi_bsg_fc.h> |
| #include "scsi_priv.h" |
| #include "scsi_transport_fc_internal.h" |
| |
| static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
| static void fc_vport_sched_delete(struct work_struct *work); |
| static int fc_vport_setup(struct Scsi_Host *shost, int channel, |
| struct device *pdev, struct fc_vport_identifiers *ids, |
| struct fc_vport **vport); |
| static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *); |
| static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *); |
| static void fc_bsg_remove(struct request_queue *); |
| static void fc_bsg_goose_queue(struct fc_rport *); |
| |
| /* |
| * Redefine so that we can have same named attributes in the |
| * sdev/starget/host objects. |
| */ |
| #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ |
| struct device_attribute device_attr_##_prefix##_##_name = \ |
| __ATTR(_name,_mode,_show,_store) |
| |
| #define fc_enum_name_search(title, table_type, table) \ |
| static const char *get_fc_##title##_name(enum table_type table_key) \ |
| { \ |
| int i; \ |
| char *name = NULL; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (table[i].value == table_key) { \ |
| name = table[i].name; \ |
| break; \ |
| } \ |
| } \ |
| return name; \ |
| } |
| |
| #define fc_enum_name_match(title, table_type, table) \ |
| static int get_fc_##title##_match(const char *table_key, \ |
| enum table_type *value) \ |
| { \ |
| int i; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (strncmp(table_key, table[i].name, \ |
| table[i].matchlen) == 0) { \ |
| *value = table[i].value; \ |
| return 0; /* success */ \ |
| } \ |
| } \ |
| return 1; /* failure */ \ |
| } |
| |
| |
| /* Convert fc_port_type values to ascii string name */ |
| static struct { |
| enum fc_port_type value; |
| char *name; |
| } fc_port_type_names[] = { |
| { FC_PORTTYPE_UNKNOWN, "Unknown" }, |
| { FC_PORTTYPE_OTHER, "Other" }, |
| { FC_PORTTYPE_NOTPRESENT, "Not Present" }, |
| { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, |
| { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, |
| { FC_PORTTYPE_LPORT, "LPort (private loop)" }, |
| { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" }, |
| { FC_PORTTYPE_NPIV, "NPIV VPORT" }, |
| }; |
| fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) |
| #define FC_PORTTYPE_MAX_NAMELEN 50 |
| |
| /* Reuse fc_port_type enum function for vport_type */ |
| #define get_fc_vport_type_name get_fc_port_type_name |
| |
| |
| /* Convert fc_host_event_code values to ascii string name */ |
| static const struct { |
| enum fc_host_event_code value; |
| char *name; |
| } fc_host_event_code_names[] = { |
| { FCH_EVT_LIP, "lip" }, |
| { FCH_EVT_LINKUP, "link_up" }, |
| { FCH_EVT_LINKDOWN, "link_down" }, |
| { FCH_EVT_LIPRESET, "lip_reset" }, |
| { FCH_EVT_RSCN, "rscn" }, |
| { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, |
| { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, |
| { FCH_EVT_PORT_ONLINE, "port_online" }, |
| { FCH_EVT_PORT_OFFLINE, "port_offline" }, |
| { FCH_EVT_PORT_FABRIC, "port_fabric" }, |
| { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, |
| { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, |
| }; |
| fc_enum_name_search(host_event_code, fc_host_event_code, |
| fc_host_event_code_names) |
| #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 |
| |
| |
| /* Convert fc_port_state values to ascii string name */ |
| static struct { |
| enum fc_port_state value; |
| char *name; |
| } fc_port_state_names[] = { |
| { FC_PORTSTATE_UNKNOWN, "Unknown" }, |
| { FC_PORTSTATE_NOTPRESENT, "Not Present" }, |
| { FC_PORTSTATE_ONLINE, "Online" }, |
| { FC_PORTSTATE_OFFLINE, "Offline" }, |
| { FC_PORTSTATE_BLOCKED, "Blocked" }, |
| { FC_PORTSTATE_BYPASSED, "Bypassed" }, |
| { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, |
| { FC_PORTSTATE_LINKDOWN, "Linkdown" }, |
| { FC_PORTSTATE_ERROR, "Error" }, |
| { FC_PORTSTATE_LOOPBACK, "Loopback" }, |
| { FC_PORTSTATE_DELETED, "Deleted" }, |
| }; |
| fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) |
| #define FC_PORTSTATE_MAX_NAMELEN 20 |
| |
| |
| /* Convert fc_vport_state values to ascii string name */ |
| static struct { |
| enum fc_vport_state value; |
| char *name; |
| } fc_vport_state_names[] = { |
| { FC_VPORT_UNKNOWN, "Unknown" }, |
| { FC_VPORT_ACTIVE, "Active" }, |
| { FC_VPORT_DISABLED, "Disabled" }, |
| { FC_VPORT_LINKDOWN, "Linkdown" }, |
| { FC_VPORT_INITIALIZING, "Initializing" }, |
| { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" }, |
| { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" }, |
| { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" }, |
| { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" }, |
| { FC_VPORT_FAILED, "VPort Failed" }, |
| }; |
| fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names) |
| #define FC_VPORTSTATE_MAX_NAMELEN 24 |
| |
| /* Reuse fc_vport_state enum function for vport_last_state */ |
| #define get_fc_vport_last_state_name get_fc_vport_state_name |
| |
| |
| /* Convert fc_tgtid_binding_type values to ascii string name */ |
| static const struct { |
| enum fc_tgtid_binding_type value; |
| char *name; |
| int matchlen; |
| } fc_tgtid_binding_type_names[] = { |
| { FC_TGTID_BIND_NONE, "none", 4 }, |
| { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, |
| { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, |
| { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, |
| }; |
| fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, |
| fc_tgtid_binding_type_names) |
| fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, |
| fc_tgtid_binding_type_names) |
| #define FC_BINDTYPE_MAX_NAMELEN 30 |
| |
| |
| #define fc_bitfield_name_search(title, table) \ |
| static ssize_t \ |
| get_fc_##title##_names(u32 table_key, char *buf) \ |
| { \ |
| char *prefix = ""; \ |
| ssize_t len = 0; \ |
| int i; \ |
| \ |
| for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
| if (table[i].value & table_key) { \ |
| len += sprintf(buf + len, "%s%s", \ |
| prefix, table[i].name); \ |
| prefix = ", "; \ |
| } \ |
| } \ |
| len += sprintf(buf + len, "\n"); \ |
| return len; \ |
| } |
| |
| |
| /* Convert FC_COS bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_cos_names[] = { |
| { FC_COS_CLASS1, "Class 1" }, |
| { FC_COS_CLASS2, "Class 2" }, |
| { FC_COS_CLASS3, "Class 3" }, |
| { FC_COS_CLASS4, "Class 4" }, |
| { FC_COS_CLASS6, "Class 6" }, |
| }; |
| fc_bitfield_name_search(cos, fc_cos_names) |
| |
| |
| /* Convert FC_PORTSPEED bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_port_speed_names[] = { |
| { FC_PORTSPEED_1GBIT, "1 Gbit" }, |
| { FC_PORTSPEED_2GBIT, "2 Gbit" }, |
| { FC_PORTSPEED_4GBIT, "4 Gbit" }, |
| { FC_PORTSPEED_10GBIT, "10 Gbit" }, |
| { FC_PORTSPEED_8GBIT, "8 Gbit" }, |
| { FC_PORTSPEED_16GBIT, "16 Gbit" }, |
| { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, |
| }; |
| fc_bitfield_name_search(port_speed, fc_port_speed_names) |
| |
| |
| static int |
| show_fc_fc4s (char *buf, u8 *fc4_list) |
| { |
| int i, len=0; |
| |
| for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) |
| len += sprintf(buf + len , "0x%02x ", *fc4_list); |
| len += sprintf(buf + len, "\n"); |
| return len; |
| } |
| |
| |
| /* Convert FC_PORT_ROLE bit values to ascii string name */ |
| static const struct { |
| u32 value; |
| char *name; |
| } fc_port_role_names[] = { |
| { FC_PORT_ROLE_FCP_TARGET, "FCP Target" }, |
| { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, |
| { FC_PORT_ROLE_IP_PORT, "IP Port" }, |
| }; |
| fc_bitfield_name_search(port_roles, fc_port_role_names) |
| |
| /* |
| * Define roles that are specific to port_id. Values are relative to ROLE_MASK. |
| */ |
| #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 |
| #define FC_WELLKNOWN_ROLE_MASK 0x00000f |
| #define FC_FPORT_PORTID 0x00000e |
| #define FC_FABCTLR_PORTID 0x00000d |
| #define FC_DIRSRVR_PORTID 0x00000c |
| #define FC_TIMESRVR_PORTID 0x00000b |
| #define FC_MGMTSRVR_PORTID 0x00000a |
| |
| |
| static void fc_timeout_deleted_rport(struct work_struct *work); |
| static void fc_timeout_fail_rport_io(struct work_struct *work); |
| static void fc_scsi_scan_rport(struct work_struct *work); |
| |
| /* |
| * Attribute counts pre object type... |
| * Increase these values if you add attributes |
| */ |
| #define FC_STARGET_NUM_ATTRS 3 |
| #define FC_RPORT_NUM_ATTRS 10 |
| #define FC_VPORT_NUM_ATTRS 9 |
| #define FC_HOST_NUM_ATTRS 22 |
| |
| struct fc_internal { |
| struct scsi_transport_template t; |
| struct fc_function_template *f; |
| |
| /* |
| * For attributes : each object has : |
| * An array of the actual attributes structures |
| * An array of null-terminated pointers to the attribute |
| * structures - used for mid-layer interaction. |
| * |
| * The attribute containers for the starget and host are are |
| * part of the midlayer. As the remote port is specific to the |
| * fc transport, we must provide the attribute container. |
| */ |
| struct device_attribute private_starget_attrs[ |
| FC_STARGET_NUM_ATTRS]; |
| struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; |
| |
| struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; |
| struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; |
| |
| struct transport_container rport_attr_cont; |
| struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; |
| struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; |
| |
| struct transport_container vport_attr_cont; |
| struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS]; |
| struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1]; |
| }; |
| |
| #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) |
| |
| static int fc_target_setup(struct transport_container *tc, struct device *dev, |
| struct device *cdev) |
| { |
| struct scsi_target *starget = to_scsi_target(dev); |
| struct fc_rport *rport = starget_to_rport(starget); |
| |
| /* |
| * if parent is remote port, use values from remote port. |
| * Otherwise, this host uses the fc_transport, but not the |
| * remote port interface. As such, initialize to known non-values. |
| */ |
| if (rport) { |
| fc_starget_node_name(starget) = rport->node_name; |
| fc_starget_port_name(starget) = rport->port_name; |
| fc_starget_port_id(starget) = rport->port_id; |
| } else { |
| fc_starget_node_name(starget) = -1; |
| fc_starget_port_name(starget) = -1; |
| fc_starget_port_id(starget) = -1; |
| } |
| |
| return 0; |
| } |
| |
| static DECLARE_TRANSPORT_CLASS(fc_transport_class, |
| "fc_transport", |
| fc_target_setup, |
| NULL, |
| NULL); |
| |
| static int fc_host_setup(struct transport_container *tc, struct device *dev, |
| struct device *cdev) |
| { |
| struct Scsi_Host *shost = dev_to_shost(dev); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| |
| /* |
| * Set default values easily detected by the midlayer as |
| * failure cases. The scsi lldd is responsible for initializing |
| * all transport attributes to valid values per host. |
| */ |
| fc_host->node_name = -1; |
| fc_host->port_name = -1; |
| fc_host->permanent_port_name = -1; |
| fc_host->supported_classes = FC_COS_UNSPECIFIED; |
| memset(fc_host->supported_fc4s, 0, |
| sizeof(fc_host->supported_fc4s)); |
| fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
| fc_host->maxframe_size = -1; |
| fc_host->max_npiv_vports = 0; |
| memset(fc_host->serial_number, 0, |
| sizeof(fc_host->serial_number)); |
| |
| fc_host->port_id = -1; |
| fc_host->port_type = FC_PORTTYPE_UNKNOWN; |
| fc_host->port_state = FC_PORTSTATE_UNKNOWN; |
| memset(fc_host->active_fc4s, 0, |
| sizeof(fc_host->active_fc4s)); |
| fc_host->speed = FC_PORTSPEED_UNKNOWN; |
| fc_host->fabric_name = -1; |
| memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
| memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); |
| |
| fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; |
| |
| INIT_LIST_HEAD(&fc_host->rports); |
| INIT_LIST_HEAD(&fc_host->rport_bindings); |
| INIT_LIST_HEAD(&fc_host->vports); |
| fc_host->next_rport_number = 0; |
| fc_host->next_target_id = 0; |
| fc_host->next_vport_number = 0; |
| fc_host->npiv_vports_inuse = 0; |
| |
| snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name), |
| "fc_wq_%d", shost->host_no); |
| fc_host->work_q = create_singlethread_workqueue( |
| fc_host->work_q_name); |
| if (!fc_host->work_q) |
| return -ENOMEM; |
| |
| snprintf(fc_host->devloss_work_q_name, |
| sizeof(fc_host->devloss_work_q_name), |
| "fc_dl_%d", shost->host_no); |
| fc_host->devloss_work_q = create_singlethread_workqueue( |
| fc_host->devloss_work_q_name); |
| if (!fc_host->devloss_work_q) { |
| destroy_workqueue(fc_host->work_q); |
| fc_host->work_q = NULL; |
| return -ENOMEM; |
| } |
| |
| fc_bsg_hostadd(shost, fc_host); |
| /* ignore any bsg add error - we just can't do sgio */ |
| |
| return 0; |
| } |
| |
| static int fc_host_remove(struct transport_container *tc, struct device *dev, |
| struct device *cdev) |
| { |
| struct Scsi_Host *shost = dev_to_shost(dev); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| |
| fc_bsg_remove(fc_host->rqst_q); |
| return 0; |
| } |
| |
| static DECLARE_TRANSPORT_CLASS(fc_host_class, |
| "fc_host", |
| fc_host_setup, |
| fc_host_remove, |
| NULL); |
| |
| /* |
| * Setup and Remove actions for remote ports are handled |
| * in the service functions below. |
| */ |
| static DECLARE_TRANSPORT_CLASS(fc_rport_class, |
| "fc_remote_ports", |
| NULL, |
| NULL, |
| NULL); |
| |
| /* |
| * Setup and Remove actions for virtual ports are handled |
| * in the service functions below. |
| */ |
| static DECLARE_TRANSPORT_CLASS(fc_vport_class, |
| "fc_vports", |
| NULL, |
| NULL, |
| NULL); |
| |
| /* |
| * Module Parameters |
| */ |
| |
| /* |
| * dev_loss_tmo: the default number of seconds that the FC transport |
| * should insulate the loss of a remote port. |
| * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. |
| */ |
| static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
| |
| module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(dev_loss_tmo, |
| "Maximum number of seconds that the FC transport should" |
| " insulate the loss of a remote port. Once this value is" |
| " exceeded, the scsi target is removed. Value should be" |
| " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if" |
| " fast_io_fail_tmo is not set."); |
| |
| /* |
| * Netlink Infrastructure |
| */ |
| |
| static atomic_t fc_event_seq; |
| |
| /** |
| * fc_get_event_number - Obtain the next sequential FC event number |
| * |
| * Notes: |
| * We could have inlined this, but it would have required fc_event_seq to |
| * be exposed. For now, live with the subroutine call. |
| * Atomic used to avoid lock/unlock... |
| */ |
| u32 |
| fc_get_event_number(void) |
| { |
| return atomic_add_return(1, &fc_event_seq); |
| } |
| EXPORT_SYMBOL(fc_get_event_number); |
| |
| |
| /** |
| * fc_host_post_event - called to post an even on an fc_host. |
| * @shost: host the event occurred on |
| * @event_number: fc event number obtained from get_fc_event_number() |
| * @event_code: fc_host event being posted |
| * @event_data: 32bits of data for the event being posted |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| void |
| fc_host_post_event(struct Scsi_Host *shost, u32 event_number, |
| enum fc_host_event_code event_code, u32 event_data) |
| { |
| struct sk_buff *skb; |
| struct nlmsghdr *nlh; |
| struct fc_nl_event *event; |
| const char *name; |
| u32 len, skblen; |
| int err; |
| |
| if (!scsi_nl_sock) { |
| err = -ENOENT; |
| goto send_fail; |
| } |
| |
| len = FC_NL_MSGALIGN(sizeof(*event)); |
| skblen = NLMSG_SPACE(len); |
| |
| skb = alloc_skb(skblen, GFP_KERNEL); |
| if (!skb) { |
| err = -ENOBUFS; |
| goto send_fail; |
| } |
| |
| nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, |
| skblen - sizeof(*nlh), 0); |
| if (!nlh) { |
| err = -ENOBUFS; |
| goto send_fail_skb; |
| } |
| event = NLMSG_DATA(nlh); |
| |
| INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, |
| FC_NL_ASYNC_EVENT, len); |
| event->seconds = get_seconds(); |
| event->vendor_id = 0; |
| event->host_no = shost->host_no; |
| event->event_datalen = sizeof(u32); /* bytes */ |
| event->event_num = event_number; |
| event->event_code = event_code; |
| event->event_data = event_data; |
| |
| nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
| GFP_KERNEL); |
| return; |
| |
| send_fail_skb: |
| kfree_skb(skb); |
| send_fail: |
| name = get_fc_host_event_code_name(event_code); |
| printk(KERN_WARNING |
| "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", |
| __func__, shost->host_no, |
| (name) ? name : "<unknown>", event_data, err); |
| return; |
| } |
| EXPORT_SYMBOL(fc_host_post_event); |
| |
| |
| /** |
| * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host |
| * @shost: host the event occurred on |
| * @event_number: fc event number obtained from get_fc_event_number() |
| * @data_len: amount, in bytes, of vendor unique data |
| * @data_buf: pointer to vendor unique data |
| * @vendor_id: Vendor id |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| void |
| fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, |
| u32 data_len, char * data_buf, u64 vendor_id) |
| { |
| struct sk_buff *skb; |
| struct nlmsghdr *nlh; |
| struct fc_nl_event *event; |
| u32 len, skblen; |
| int err; |
| |
| if (!scsi_nl_sock) { |
| err = -ENOENT; |
| goto send_vendor_fail; |
| } |
| |
| len = FC_NL_MSGALIGN(sizeof(*event) + data_len); |
| skblen = NLMSG_SPACE(len); |
| |
| skb = alloc_skb(skblen, GFP_KERNEL); |
| if (!skb) { |
| err = -ENOBUFS; |
| goto send_vendor_fail; |
| } |
| |
| nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, |
| skblen - sizeof(*nlh), 0); |
| if (!nlh) { |
| err = -ENOBUFS; |
| goto send_vendor_fail_skb; |
| } |
| event = NLMSG_DATA(nlh); |
| |
| INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, |
| FC_NL_ASYNC_EVENT, len); |
| event->seconds = get_seconds(); |
| event->vendor_id = vendor_id; |
| event->host_no = shost->host_no; |
| event->event_datalen = data_len; /* bytes */ |
| event->event_num = event_number; |
| event->event_code = FCH_EVT_VENDOR_UNIQUE; |
| memcpy(&event->event_data, data_buf, data_len); |
| |
| nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
| GFP_KERNEL); |
| return; |
| |
| send_vendor_fail_skb: |
| kfree_skb(skb); |
| send_vendor_fail: |
| printk(KERN_WARNING |
| "%s: Dropped Event : host %d vendor_unique - err %d\n", |
| __func__, shost->host_no, err); |
| return; |
| } |
| EXPORT_SYMBOL(fc_host_post_vendor_event); |
| |
| |
| |
| static __init int fc_transport_init(void) |
| { |
| int error; |
| |
| atomic_set(&fc_event_seq, 0); |
| |
| error = transport_class_register(&fc_host_class); |
| if (error) |
| return error; |
| error = transport_class_register(&fc_vport_class); |
| if (error) |
| goto unreg_host_class; |
| error = transport_class_register(&fc_rport_class); |
| if (error) |
| goto unreg_vport_class; |
| error = transport_class_register(&fc_transport_class); |
| if (error) |
| goto unreg_rport_class; |
| return 0; |
| |
| unreg_rport_class: |
| transport_class_unregister(&fc_rport_class); |
| unreg_vport_class: |
| transport_class_unregister(&fc_vport_class); |
| unreg_host_class: |
| transport_class_unregister(&fc_host_class); |
| return error; |
| } |
| |
| static void __exit fc_transport_exit(void) |
| { |
| transport_class_unregister(&fc_transport_class); |
| transport_class_unregister(&fc_rport_class); |
| transport_class_unregister(&fc_host_class); |
| transport_class_unregister(&fc_vport_class); |
| } |
| |
| /* |
| * FC Remote Port Attribute Management |
| */ |
| |
| #define fc_rport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_rport_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(dev); \ |
| struct Scsi_Host *shost = rport_to_shost(rport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| if ((i->f->get_rport_##field) && \ |
| !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
| (rport->port_state == FC_PORTSTATE_DELETED) || \ |
| (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
| i->f->get_rport_##field(rport); \ |
| return snprintf(buf, sz, format_string, cast rport->field); \ |
| } |
| |
| #define fc_rport_store_function(field) \ |
| static ssize_t \ |
| store_fc_rport_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| int val; \ |
| struct fc_rport *rport = transport_class_to_rport(dev); \ |
| struct Scsi_Host *shost = rport_to_shost(rport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| char *cp; \ |
| if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
| (rport->port_state == FC_PORTSTATE_DELETED) || \ |
| (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
| return -EBUSY; \ |
| val = simple_strtoul(buf, &cp, 0); \ |
| if (*cp && (*cp != '\n')) \ |
| return -EINVAL; \ |
| i->f->set_rport_##field(rport, val); \ |
| return count; \ |
| } |
| |
| #define fc_rport_rd_attr(field, format_string, sz) \ |
| fc_rport_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_rport_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_rport_rw_attr(field, format_string, sz) \ |
| fc_rport_show_function(field, format_string, sz, ) \ |
| fc_rport_store_function(field) \ |
| static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ |
| show_fc_rport_##field, \ |
| store_fc_rport_##field) |
| |
| |
| #define fc_private_rport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_rport_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(dev); \ |
| return snprintf(buf, sz, format_string, cast rport->field); \ |
| } |
| |
| #define fc_private_rport_rd_attr(field, format_string, sz) \ |
| fc_private_rport_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_private_rport_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(rport, field, S_IRUGO, \ |
| show_fc_rport_##field, NULL) |
| |
| |
| #define fc_private_rport_rd_enum_attr(title, maxlen) \ |
| static ssize_t \ |
| show_fc_rport_##title (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct fc_rport *rport = transport_class_to_rport(dev); \ |
| const char *name; \ |
| name = get_fc_##title##_name(rport->title); \ |
| if (!name) \ |
| return -EINVAL; \ |
| return snprintf(buf, maxlen, "%s\n", name); \ |
| } \ |
| static FC_DEVICE_ATTR(rport, title, S_IRUGO, \ |
| show_fc_rport_##title, NULL) |
| |
| |
| #define SETUP_RPORT_ATTRIBUTE_RD(field) \ |
| i->private_rport_attrs[count] = device_attr_rport_##field; \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| if (i->f->show_rport_##field) \ |
| count++ |
| |
| #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ |
| i->private_rport_attrs[count] = device_attr_rport_##field; \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| count++ |
| |
| #define SETUP_RPORT_ATTRIBUTE_RW(field) \ |
| i->private_rport_attrs[count] = device_attr_rport_##field; \ |
| if (!i->f->set_rport_##field) { \ |
| i->private_rport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_rport_attrs[count].store = NULL; \ |
| } \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| if (i->f->show_rport_##field) \ |
| count++ |
| |
| #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
| { \ |
| i->private_rport_attrs[count] = device_attr_rport_##field; \ |
| i->rport_attrs[count] = &i->private_rport_attrs[count]; \ |
| count++; \ |
| } |
| |
| |
| /* The FC Transport Remote Port Attributes: */ |
| |
| /* Fixed Remote Port Attributes */ |
| |
| fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); |
| |
| static ssize_t |
| show_fc_rport_supported_classes (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct fc_rport *rport = transport_class_to_rport(dev); |
| if (rport->supported_classes == FC_COS_UNSPECIFIED) |
| return snprintf(buf, 20, "unspecified\n"); |
| return get_fc_cos_names(rport->supported_classes, buf); |
| } |
| static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO, |
| show_fc_rport_supported_classes, NULL); |
| |
| /* Dynamic Remote Port Attributes */ |
| |
| /* |
| * dev_loss_tmo attribute |
| */ |
| fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) |
| static ssize_t |
| store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int val; |
| struct fc_rport *rport = transport_class_to_rport(dev); |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| char *cp; |
| if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
| (rport->port_state == FC_PORTSTATE_DELETED) || |
| (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
| return -EBUSY; |
| val = simple_strtoul(buf, &cp, 0); |
| if ((*cp && (*cp != '\n')) || (val < 0)) |
| return -EINVAL; |
| |
| /* |
| * If fast_io_fail is off we have to cap |
| * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT |
| */ |
| if (rport->fast_io_fail_tmo == -1 && |
| val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) |
| return -EINVAL; |
| |
| i->f->set_rport_dev_loss_tmo(rport, val); |
| return count; |
| } |
| static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, |
| show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); |
| |
| |
| /* Private Remote Port Attributes */ |
| |
| fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); |
| |
| static ssize_t |
| show_fc_rport_roles (struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct fc_rport *rport = transport_class_to_rport(dev); |
| |
| /* identify any roles that are port_id specific */ |
| if ((rport->port_id != -1) && |
| (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == |
| FC_WELLKNOWN_PORTID_MASK) { |
| switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { |
| case FC_FPORT_PORTID: |
| return snprintf(buf, 30, "Fabric Port\n"); |
| case FC_FABCTLR_PORTID: |
| return snprintf(buf, 30, "Fabric Controller\n"); |
| case FC_DIRSRVR_PORTID: |
| return snprintf(buf, 30, "Directory Server\n"); |
| case FC_TIMESRVR_PORTID: |
| return snprintf(buf, 30, "Time Server\n"); |
| case FC_MGMTSRVR_PORTID: |
| return snprintf(buf, 30, "Management Server\n"); |
| default: |
| return snprintf(buf, 30, "Unknown Fabric Entity\n"); |
| } |
| } else { |
| if (rport->roles == FC_PORT_ROLE_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| return get_fc_port_roles_names(rport->roles, buf); |
| } |
| } |
| static FC_DEVICE_ATTR(rport, roles, S_IRUGO, |
| show_fc_rport_roles, NULL); |
| |
| fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); |
| |
| /* |
| * fast_io_fail_tmo attribute |
| */ |
| static ssize_t |
| show_fc_rport_fast_io_fail_tmo (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct fc_rport *rport = transport_class_to_rport(dev); |
| |
| if (rport->fast_io_fail_tmo == -1) |
| return snprintf(buf, 5, "off\n"); |
| return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); |
| } |
| |
| static ssize_t |
| store_fc_rport_fast_io_fail_tmo(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| int val; |
| char *cp; |
| struct fc_rport *rport = transport_class_to_rport(dev); |
| |
| if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
| (rport->port_state == FC_PORTSTATE_DELETED) || |
| (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
| return -EBUSY; |
| if (strncmp(buf, "off", 3) == 0) |
| rport->fast_io_fail_tmo = -1; |
| else { |
| val = simple_strtoul(buf, &cp, 0); |
| if ((*cp && (*cp != '\n')) || (val < 0)) |
| return -EINVAL; |
| /* |
| * Cap fast_io_fail by dev_loss_tmo or |
| * SCSI_DEVICE_BLOCK_MAX_TIMEOUT. |
| */ |
| if ((val >= rport->dev_loss_tmo) || |
| (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) |
| return -EINVAL; |
| |
| rport->fast_io_fail_tmo = val; |
| } |
| return count; |
| } |
| static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, |
| show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); |
| |
| |
| /* |
| * FC SCSI Target Attribute Management |
| */ |
| |
| /* |
| * Note: in the target show function we recognize when the remote |
| * port is in the heirarchy and do not allow the driver to get |
| * involved in sysfs functions. The driver only gets involved if |
| * it's the "old" style that doesn't use rports. |
| */ |
| #define fc_starget_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_starget_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct scsi_target *starget = transport_class_to_starget(dev); \ |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| struct fc_rport *rport = starget_to_rport(starget); \ |
| if (rport) \ |
| fc_starget_##field(starget) = rport->field; \ |
| else if (i->f->get_starget_##field) \ |
| i->f->get_starget_##field(starget); \ |
| return snprintf(buf, sz, format_string, \ |
| cast fc_starget_##field(starget)); \ |
| } |
| |
| #define fc_starget_rd_attr(field, format_string, sz) \ |
| fc_starget_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| show_fc_starget_##field, NULL) |
| |
| #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_starget_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(starget, field, S_IRUGO, \ |
| show_fc_starget_##field, NULL) |
| |
| #define SETUP_STARGET_ATTRIBUTE_RD(field) \ |
| i->private_starget_attrs[count] = device_attr_starget_##field; \ |
| i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_starget_attrs[count].store = NULL; \ |
| i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| if (i->f->show_starget_##field) \ |
| count++ |
| |
| #define SETUP_STARGET_ATTRIBUTE_RW(field) \ |
| i->private_starget_attrs[count] = device_attr_starget_##field; \ |
| if (!i->f->set_starget_##field) { \ |
| i->private_starget_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_starget_attrs[count].store = NULL; \ |
| } \ |
| i->starget_attrs[count] = &i->private_starget_attrs[count]; \ |
| if (i->f->show_starget_##field) \ |
| count++ |
| |
| /* The FC Transport SCSI Target Attributes: */ |
| fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_starget_rd_attr(port_id, "0x%06x\n", 20); |
| |
| |
| /* |
| * FC Virtual Port Attribute Management |
| */ |
| |
| #define fc_vport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_vport_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| struct Scsi_Host *shost = vport_to_shost(vport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| if ((i->f->get_vport_##field) && \ |
| !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \ |
| i->f->get_vport_##field(vport); \ |
| return snprintf(buf, sz, format_string, cast vport->field); \ |
| } |
| |
| #define fc_vport_store_function(field) \ |
| static ssize_t \ |
| store_fc_vport_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| int val; \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| struct Scsi_Host *shost = vport_to_shost(vport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| char *cp; \ |
| if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ |
| return -EBUSY; \ |
| val = simple_strtoul(buf, &cp, 0); \ |
| if (*cp && (*cp != '\n')) \ |
| return -EINVAL; \ |
| i->f->set_vport_##field(vport, val); \ |
| return count; \ |
| } |
| |
| #define fc_vport_store_str_function(field, slen) \ |
| static ssize_t \ |
| store_fc_vport_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| struct Scsi_Host *shost = vport_to_shost(vport); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| unsigned int cnt=count; \ |
| \ |
| /* count may include a LF at end of string */ \ |
| if (buf[cnt-1] == '\n') \ |
| cnt--; \ |
| if (cnt > ((slen) - 1)) \ |
| return -EINVAL; \ |
| memcpy(vport->field, buf, cnt); \ |
| i->f->set_vport_##field(vport); \ |
| return count; \ |
| } |
| |
| #define fc_vport_rd_attr(field, format_string, sz) \ |
| fc_vport_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
| show_fc_vport_##field, NULL) |
| |
| #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_vport_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
| show_fc_vport_##field, NULL) |
| |
| #define fc_vport_rw_attr(field, format_string, sz) \ |
| fc_vport_show_function(field, format_string, sz, ) \ |
| fc_vport_store_function(field) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
| show_fc_vport_##field, \ |
| store_fc_vport_##field) |
| |
| #define fc_private_vport_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_vport_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| return snprintf(buf, sz, format_string, cast vport->field); \ |
| } |
| |
| #define fc_private_vport_store_u32_function(field) \ |
| static ssize_t \ |
| store_fc_vport_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| u32 val; \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| char *cp; \ |
| if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \ |
| return -EBUSY; \ |
| val = simple_strtoul(buf, &cp, 0); \ |
| if (*cp && (*cp != '\n')) \ |
| return -EINVAL; \ |
| vport->field = val; \ |
| return count; \ |
| } |
| |
| |
| #define fc_private_vport_rd_attr(field, format_string, sz) \ |
| fc_private_vport_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
| show_fc_vport_##field, NULL) |
| |
| #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_private_vport_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO, \ |
| show_fc_vport_##field, NULL) |
| |
| #define fc_private_vport_rw_u32_attr(field, format_string, sz) \ |
| fc_private_vport_show_function(field, format_string, sz, ) \ |
| fc_private_vport_store_u32_function(field) \ |
| static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \ |
| show_fc_vport_##field, \ |
| store_fc_vport_##field) |
| |
| |
| #define fc_private_vport_rd_enum_attr(title, maxlen) \ |
| static ssize_t \ |
| show_fc_vport_##title (struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct fc_vport *vport = transport_class_to_vport(dev); \ |
| const char *name; \ |
| name = get_fc_##title##_name(vport->title); \ |
| if (!name) \ |
| return -EINVAL; \ |
| return snprintf(buf, maxlen, "%s\n", name); \ |
| } \ |
| static FC_DEVICE_ATTR(vport, title, S_IRUGO, \ |
| show_fc_vport_##title, NULL) |
| |
| |
| #define SETUP_VPORT_ATTRIBUTE_RD(field) \ |
| i->private_vport_attrs[count] = device_attr_vport_##field; \ |
| i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_vport_attrs[count].store = NULL; \ |
| i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
| if (i->f->get_##field) \ |
| count++ |
| /* NOTE: Above MACRO differs: checks function not show bit */ |
| |
| #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \ |
| i->private_vport_attrs[count] = device_attr_vport_##field; \ |
| i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_vport_attrs[count].store = NULL; \ |
| i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
| count++ |
| |
| #define SETUP_VPORT_ATTRIBUTE_WR(field) \ |
| i->private_vport_attrs[count] = device_attr_vport_##field; \ |
| i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
| if (i->f->field) \ |
| count++ |
| /* NOTE: Above MACRO differs: checks function */ |
| |
| #define SETUP_VPORT_ATTRIBUTE_RW(field) \ |
| i->private_vport_attrs[count] = device_attr_vport_##field; \ |
| if (!i->f->set_vport_##field) { \ |
| i->private_vport_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_vport_attrs[count].store = NULL; \ |
| } \ |
| i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
| count++ |
| /* NOTE: Above MACRO differs: does not check show bit */ |
| |
| #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \ |
| { \ |
| i->private_vport_attrs[count] = device_attr_vport_##field; \ |
| i->vport_attrs[count] = &i->private_vport_attrs[count]; \ |
| count++; \ |
| } |
| |
| |
| /* The FC Transport Virtual Port Attributes: */ |
| |
| /* Fixed Virtual Port Attributes */ |
| |
| /* Dynamic Virtual Port Attributes */ |
| |
| /* Private Virtual Port Attributes */ |
| |
| fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN); |
| fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN); |
| fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| |
| static ssize_t |
| show_fc_vport_roles (struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct fc_vport *vport = transport_class_to_vport(dev); |
| |
| if (vport->roles == FC_PORT_ROLE_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| return get_fc_port_roles_names(vport->roles, buf); |
| } |
| static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL); |
| |
| fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN); |
| |
| fc_private_vport_show_function(symbolic_name, "%s\n", |
| FC_VPORT_SYMBOLIC_NAMELEN + 1, ) |
| fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN) |
| static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR, |
| show_fc_vport_symbolic_name, store_fc_vport_symbolic_name); |
| |
| static ssize_t |
| store_fc_vport_delete(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct fc_vport *vport = transport_class_to_vport(dev); |
| struct Scsi_Host *shost = vport_to_shost(vport); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return -EBUSY; |
| } |
| vport->flags |= FC_VPORT_DELETING; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| fc_queue_work(shost, &vport->vport_delete_work); |
| return count; |
| } |
| static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR, |
| NULL, store_fc_vport_delete); |
| |
| |
| /* |
| * Enable/Disable vport |
| * Write "1" to disable, write "0" to enable |
| */ |
| static ssize_t |
| store_fc_vport_disable(struct device *dev, struct device_attribute *attr, |
| const char *buf, |
| size_t count) |
| { |
| struct fc_vport *vport = transport_class_to_vport(dev); |
| struct Scsi_Host *shost = vport_to_shost(vport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| int stat; |
| |
| if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
| return -EBUSY; |
| |
| if (*buf == '0') { |
| if (vport->vport_state != FC_VPORT_DISABLED) |
| return -EALREADY; |
| } else if (*buf == '1') { |
| if (vport->vport_state == FC_VPORT_DISABLED) |
| return -EALREADY; |
| } else |
| return -EINVAL; |
| |
| stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true)); |
| return stat ? stat : count; |
| } |
| static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR, |
| NULL, store_fc_vport_disable); |
| |
| |
| /* |
| * Host Attribute Management |
| */ |
| |
| #define fc_host_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_host_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| if (i->f->get_host_##field) \ |
| i->f->get_host_##field(shost); \ |
| return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| } |
| |
| #define fc_host_store_function(field) \ |
| static ssize_t \ |
| store_fc_host_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| int val; \ |
| struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| char *cp; \ |
| \ |
| val = simple_strtoul(buf, &cp, 0); \ |
| if (*cp && (*cp != '\n')) \ |
| return -EINVAL; \ |
| i->f->set_host_##field(shost, val); \ |
| return count; \ |
| } |
| |
| #define fc_host_store_str_function(field, slen) \ |
| static ssize_t \ |
| store_fc_host_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| unsigned int cnt=count; \ |
| \ |
| /* count may include a LF at end of string */ \ |
| if (buf[cnt-1] == '\n') \ |
| cnt--; \ |
| if (cnt > ((slen) - 1)) \ |
| return -EINVAL; \ |
| memcpy(fc_host_##field(shost), buf, cnt); \ |
| i->f->set_host_##field(shost); \ |
| return count; \ |
| } |
| |
| #define fc_host_rd_attr(field, format_string, sz) \ |
| fc_host_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_host_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_host_rw_attr(field, format_string, sz) \ |
| fc_host_show_function(field, format_string, sz, ) \ |
| fc_host_store_function(field) \ |
| static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ |
| show_fc_host_##field, \ |
| store_fc_host_##field) |
| |
| #define fc_host_rd_enum_attr(title, maxlen) \ |
| static ssize_t \ |
| show_fc_host_##title (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
| struct fc_internal *i = to_fc_internal(shost->transportt); \ |
| const char *name; \ |
| if (i->f->get_host_##title) \ |
| i->f->get_host_##title(shost); \ |
| name = get_fc_##title##_name(fc_host_##title(shost)); \ |
| if (!name) \ |
| return -EINVAL; \ |
| return snprintf(buf, maxlen, "%s\n", name); \ |
| } \ |
| static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) |
| |
| #define SETUP_HOST_ATTRIBUTE_RD(field) \ |
| i->private_host_attrs[count] = device_attr_host_##field; \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| if (i->f->show_host_##field) \ |
| count++ |
| |
| #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \ |
| i->private_host_attrs[count] = device_attr_host_##field; \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| count++ |
| |
| #define SETUP_HOST_ATTRIBUTE_RW(field) \ |
| i->private_host_attrs[count] = device_attr_host_##field; \ |
| if (!i->f->set_host_##field) { \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| } \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| if (i->f->show_host_##field) \ |
| count++ |
| |
| |
| #define fc_private_host_show_function(field, format_string, sz, cast) \ |
| static ssize_t \ |
| show_fc_host_##field (struct device *dev, \ |
| struct device_attribute *attr, char *buf) \ |
| { \ |
| struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
| return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ |
| } |
| |
| #define fc_private_host_rd_attr(field, format_string, sz) \ |
| fc_private_host_show_function(field, format_string, sz, ) \ |
| static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ |
| fc_private_host_show_function(field, format_string, sz, (cast)) \ |
| static FC_DEVICE_ATTR(host, field, S_IRUGO, \ |
| show_fc_host_##field, NULL) |
| |
| #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ |
| i->private_host_attrs[count] = device_attr_host_##field; \ |
| i->private_host_attrs[count].attr.mode = S_IRUGO; \ |
| i->private_host_attrs[count].store = NULL; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| count++ |
| |
| #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ |
| { \ |
| i->private_host_attrs[count] = device_attr_host_##field; \ |
| i->host_attrs[count] = &i->private_host_attrs[count]; \ |
| count++; \ |
| } |
| |
| |
| /* Fixed Host Attributes */ |
| |
| static ssize_t |
| show_fc_host_supported_classes (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| |
| if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) |
| return snprintf(buf, 20, "unspecified\n"); |
| |
| return get_fc_cos_names(fc_host_supported_classes(shost), buf); |
| } |
| static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO, |
| show_fc_host_supported_classes, NULL); |
| |
| static ssize_t |
| show_fc_host_supported_fc4s (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); |
| } |
| static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, |
| show_fc_host_supported_fc4s, NULL); |
| |
| static ssize_t |
| show_fc_host_supported_speeds (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| |
| if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| |
| return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); |
| } |
| static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO, |
| show_fc_host_supported_speeds, NULL); |
| |
| |
| fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); |
| fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
| unsigned long long); |
| fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
| fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20); |
| fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); |
| |
| |
| /* Dynamic Host Attributes */ |
| |
| static ssize_t |
| show_fc_host_active_fc4s (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| if (i->f->get_host_active_fc4s) |
| i->f->get_host_active_fc4s(shost); |
| |
| return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); |
| } |
| static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO, |
| show_fc_host_active_fc4s, NULL); |
| |
| static ssize_t |
| show_fc_host_speed (struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| if (i->f->get_host_speed) |
| i->f->get_host_speed(shost); |
| |
| if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| |
| return get_fc_port_speed_names(fc_host_speed(shost), buf); |
| } |
| static FC_DEVICE_ATTR(host, speed, S_IRUGO, |
| show_fc_host_speed, NULL); |
| |
| |
| fc_host_rd_attr(port_id, "0x%06x\n", 20); |
| fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); |
| fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); |
| fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); |
| fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
| |
| fc_private_host_show_function(system_hostname, "%s\n", |
| FC_SYMBOLIC_NAME_SIZE + 1, ) |
| fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) |
| static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, |
| show_fc_host_system_hostname, store_fc_host_system_hostname); |
| |
| |
| /* Private Host Attributes */ |
| |
| static ssize_t |
| show_fc_private_host_tgtid_bind_type(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| const char *name; |
| |
| name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); |
| if (!name) |
| return -EINVAL; |
| return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); |
| } |
| |
| #define get_list_head_entry(pos, head, member) \ |
| pos = list_entry((head)->next, typeof(*pos), member) |
| |
| static ssize_t |
| store_fc_private_host_tgtid_bind_type(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_rport *rport; |
| enum fc_tgtid_binding_type val; |
| unsigned long flags; |
| |
| if (get_fc_tgtid_bind_type_match(buf, &val)) |
| return -EINVAL; |
| |
| /* if changing bind type, purge all unused consistent bindings */ |
| if (val != fc_host_tgtid_bind_type(shost)) { |
| spin_lock_irqsave(shost->host_lock, flags); |
| while (!list_empty(&fc_host_rport_bindings(shost))) { |
| get_list_head_entry(rport, |
| &fc_host_rport_bindings(shost), peers); |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| fc_host_tgtid_bind_type(shost) = val; |
| return count; |
| } |
| |
| static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, |
| show_fc_private_host_tgtid_bind_type, |
| store_fc_private_host_tgtid_bind_type); |
| |
| static ssize_t |
| store_fc_private_host_issue_lip(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| int ret; |
| |
| /* ignore any data value written to the attribute */ |
| if (i->f->issue_fc_host_lip) { |
| ret = i->f->issue_fc_host_lip(shost); |
| return ret ? ret: count; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, |
| store_fc_private_host_issue_lip); |
| |
| fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); |
| |
| |
| /* |
| * Host Statistics Management |
| */ |
| |
| /* Show a given an attribute in the statistics group */ |
| static ssize_t |
| fc_stat_show(const struct device *dev, char *buf, unsigned long offset) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct fc_host_statistics *stats; |
| ssize_t ret = -ENOENT; |
| |
| if (offset > sizeof(struct fc_host_statistics) || |
| offset % sizeof(u64) != 0) |
| WARN_ON(1); |
| |
| if (i->f->get_fc_host_stats) { |
| stats = (i->f->get_fc_host_stats)(shost); |
| if (stats) |
| ret = snprintf(buf, 20, "0x%llx\n", |
| (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); |
| } |
| return ret; |
| } |
| |
| |
| /* generate a read-only statistics attribute */ |
| #define fc_host_statistic(name) \ |
| static ssize_t show_fcstat_##name(struct device *cd, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| return fc_stat_show(cd, buf, \ |
| offsetof(struct fc_host_statistics, name)); \ |
| } \ |
| static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) |
| |
| fc_host_statistic(seconds_since_last_reset); |
| fc_host_statistic(tx_frames); |
| fc_host_statistic(tx_words); |
| fc_host_statistic(rx_frames); |
| fc_host_statistic(rx_words); |
| fc_host_statistic(lip_count); |
| fc_host_statistic(nos_count); |
| fc_host_statistic(error_frames); |
| fc_host_statistic(dumped_frames); |
| fc_host_statistic(link_failure_count); |
| fc_host_statistic(loss_of_sync_count); |
| fc_host_statistic(loss_of_signal_count); |
| fc_host_statistic(prim_seq_protocol_err_count); |
| fc_host_statistic(invalid_tx_word_count); |
| fc_host_statistic(invalid_crc_count); |
| fc_host_statistic(fcp_input_requests); |
| fc_host_statistic(fcp_output_requests); |
| fc_host_statistic(fcp_control_requests); |
| fc_host_statistic(fcp_input_megabytes); |
| fc_host_statistic(fcp_output_megabytes); |
| |
| static ssize_t |
| fc_reset_statistics(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| /* ignore any data value written to the attribute */ |
| if (i->f->reset_fc_host_stats) { |
| i->f->reset_fc_host_stats(shost); |
| return count; |
| } |
| |
| return -ENOENT; |
| } |
| static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, |
| fc_reset_statistics); |
| |
| static struct attribute *fc_statistics_attrs[] = { |
| &device_attr_host_seconds_since_last_reset.attr, |
| &device_attr_host_tx_frames.attr, |
| &device_attr_host_tx_words.attr, |
| &device_attr_host_rx_frames.attr, |
| &device_attr_host_rx_words.attr, |
| &device_attr_host_lip_count.attr, |
| &device_attr_host_nos_count.attr, |
| &device_attr_host_error_frames.attr, |
| &device_attr_host_dumped_frames.attr, |
| &device_attr_host_link_failure_count.attr, |
| &device_attr_host_loss_of_sync_count.attr, |
| &device_attr_host_loss_of_signal_count.attr, |
| &device_attr_host_prim_seq_protocol_err_count.attr, |
| &device_attr_host_invalid_tx_word_count.attr, |
| &device_attr_host_invalid_crc_count.attr, |
| &device_attr_host_fcp_input_requests.attr, |
| &device_attr_host_fcp_output_requests.attr, |
| &device_attr_host_fcp_control_requests.attr, |
| &device_attr_host_fcp_input_megabytes.attr, |
| &device_attr_host_fcp_output_megabytes.attr, |
| &device_attr_host_reset_statistics.attr, |
| NULL |
| }; |
| |
| static struct attribute_group fc_statistics_group = { |
| .name = "statistics", |
| .attrs = fc_statistics_attrs, |
| }; |
| |
| |
| /* Host Vport Attributes */ |
| |
| static int |
| fc_parse_wwn(const char *ns, u64 *nm) |
| { |
| unsigned int i, j; |
| u8 wwn[8]; |
| |
| memset(wwn, 0, sizeof(wwn)); |
| |
| /* Validate and store the new name */ |
| for (i=0, j=0; i < 16; i++) { |
| if ((*ns >= 'a') && (*ns <= 'f')) |
| j = ((j << 4) | ((*ns++ -'a') + 10)); |
| else if ((*ns >= 'A') && (*ns <= 'F')) |
| j = ((j << 4) | ((*ns++ -'A') + 10)); |
| else if ((*ns >= '0') && (*ns <= '9')) |
| j = ((j << 4) | (*ns++ -'0')); |
| else |
| return -EINVAL; |
| if (i % 2) { |
| wwn[i/2] = j & 0xff; |
| j = 0; |
| } |
| } |
| |
| *nm = wwn_to_u64(wwn); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * "Short-cut" sysfs variable to create a new vport on a FC Host. |
| * Input is a string of the form "<WWPN>:<WWNN>". Other attributes |
| * will default to a NPIV-based FCP_Initiator; The WWNs are specified |
| * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc) |
| */ |
| static ssize_t |
| store_fc_host_vport_create(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_vport_identifiers vid; |
| struct fc_vport *vport; |
| unsigned int cnt=count; |
| int stat; |
| |
| memset(&vid, 0, sizeof(vid)); |
| |
| /* count may include a LF at end of string */ |
| if (buf[cnt-1] == '\n') |
| cnt--; |
| |
| /* validate we have enough characters for WWPN */ |
| if ((cnt != (16+1+16)) || (buf[16] != ':')) |
| return -EINVAL; |
| |
| stat = fc_parse_wwn(&buf[0], &vid.port_name); |
| if (stat) |
| return stat; |
| |
| stat = fc_parse_wwn(&buf[17], &vid.node_name); |
| if (stat) |
| return stat; |
| |
| vid.roles = FC_PORT_ROLE_FCP_INITIATOR; |
| vid.vport_type = FC_PORTTYPE_NPIV; |
| /* vid.symbolic_name is already zero/NULL's */ |
| vid.disable = false; /* always enabled */ |
| |
| /* we only allow support on Channel 0 !!! */ |
| stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport); |
| return stat ? stat : count; |
| } |
| static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL, |
| store_fc_host_vport_create); |
| |
| |
| /* |
| * "Short-cut" sysfs variable to delete a vport on a FC Host. |
| * Vport is identified by a string containing "<WWPN>:<WWNN>". |
| * The WWNs are specified as hex characters, and may *not* contain |
| * any prefixes (e.g. 0x, x, etc) |
| */ |
| static ssize_t |
| store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = transport_class_to_shost(dev); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_vport *vport; |
| u64 wwpn, wwnn; |
| unsigned long flags; |
| unsigned int cnt=count; |
| int stat, match; |
| |
| /* count may include a LF at end of string */ |
| if (buf[cnt-1] == '\n') |
| cnt--; |
| |
| /* validate we have enough characters for WWPN */ |
| if ((cnt != (16+1+16)) || (buf[16] != ':')) |
| return -EINVAL; |
| |
| stat = fc_parse_wwn(&buf[0], &wwpn); |
| if (stat) |
| return stat; |
| |
| stat = fc_parse_wwn(&buf[17], &wwnn); |
| if (stat) |
| return stat; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| match = 0; |
| /* we only allow support on Channel 0 !!! */ |
| list_for_each_entry(vport, &fc_host->vports, peers) { |
| if ((vport->channel == 0) && |
| (vport->port_name == wwpn) && (vport->node_name == wwnn)) { |
| if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) |
| break; |
| vport->flags |= FC_VPORT_DELETING; |
| match = 1; |
| break; |
| } |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (!match) |
| return -ENODEV; |
| |
| stat = fc_vport_terminate(vport); |
| return stat ? stat : count; |
| } |
| static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL, |
| store_fc_host_vport_delete); |
| |
| |
| static int fc_host_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_host_device(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->t.host_attrs.ac == cont; |
| } |
| |
| static int fc_target_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_target_device(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev->parent); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->t.target_attrs.ac == cont; |
| } |
| |
| static void fc_rport_dev_release(struct device *dev) |
| { |
| struct fc_rport *rport = dev_to_rport(dev); |
| put_device(dev->parent); |
| kfree(rport); |
| } |
| |
| int scsi_is_fc_rport(const struct device *dev) |
| { |
| return dev->release == fc_rport_dev_release; |
| } |
| EXPORT_SYMBOL(scsi_is_fc_rport); |
| |
| static int fc_rport_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_fc_rport(dev)) |
| return 0; |
| |
| shost = dev_to_shost(dev->parent); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| |
| return &i->rport_attr_cont.ac == cont; |
| } |
| |
| |
| static void fc_vport_dev_release(struct device *dev) |
| { |
| struct fc_vport *vport = dev_to_vport(dev); |
| put_device(dev->parent); /* release kobj parent */ |
| kfree(vport); |
| } |
| |
| int scsi_is_fc_vport(const struct device *dev) |
| { |
| return dev->release == fc_vport_dev_release; |
| } |
| EXPORT_SYMBOL(scsi_is_fc_vport); |
| |
| static int fc_vport_match(struct attribute_container *cont, |
| struct device *dev) |
| { |
| struct fc_vport *vport; |
| struct Scsi_Host *shost; |
| struct fc_internal *i; |
| |
| if (!scsi_is_fc_vport(dev)) |
| return 0; |
| vport = dev_to_vport(dev); |
| |
| shost = vport_to_shost(vport); |
| if (!shost->transportt || shost->transportt->host_attrs.ac.class |
| != &fc_host_class.class) |
| return 0; |
| |
| i = to_fc_internal(shost->transportt); |
| return &i->vport_attr_cont.ac == cont; |
| } |
| |
| |
| /** |
| * fc_timed_out - FC Transport I/O timeout intercept handler |
| * @scmd: The SCSI command which timed out |
| * |
| * This routine protects against error handlers getting invoked while a |
| * rport is in a blocked state, typically due to a temporarily loss of |
| * connectivity. If the error handlers are allowed to proceed, requests |
| * to abort i/o, reset the target, etc will likely fail as there is no way |
| * to communicate with the device to perform the requested function. These |
| * failures may result in the midlayer taking the device offline, requiring |
| * manual intervention to restore operation. |
| * |
| * This routine, called whenever an i/o times out, validates the state of |
| * the underlying rport. If the rport is blocked, it returns |
| * EH_RESET_TIMER, which will continue to reschedule the timeout. |
| * Eventually, either the device will return, or devloss_tmo will fire, |
| * and when the timeout then fires, it will be handled normally. |
| * If the rport is not blocked, normal error handling continues. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| static enum blk_eh_timer_return |
| fc_timed_out(struct scsi_cmnd *scmd) |
| { |
| struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); |
| |
| if (rport->port_state == FC_PORTSTATE_BLOCKED) |
| return BLK_EH_RESET_TIMER; |
| |
| return BLK_EH_NOT_HANDLED; |
| } |
| |
| /* |
| * Called by fc_user_scan to locate an rport on the shost that |
| * matches the channel and target id, and invoke scsi_scan_target() |
| * on the rport. |
| */ |
| static void |
| fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun) |
| { |
| struct fc_rport *rport; |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
| if (rport->scsi_target_id == -1) |
| continue; |
| |
| if (rport->port_state != FC_PORTSTATE_ONLINE) |
| continue; |
| |
| if ((channel == rport->channel) && |
| (id == rport->scsi_target_id)) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_scan_target(&rport->dev, channel, id, lun, 1); |
| return; |
| } |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /* |
| * Called via sysfs scan routines. Necessary, as the FC transport |
| * wants to place all target objects below the rport object. So this |
| * routine must invoke the scsi_scan_target() routine with the rport |
| * object as the parent. |
| */ |
| static int |
| fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun) |
| { |
| uint chlo, chhi; |
| uint tgtlo, tgthi; |
| |
| if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) || |
| ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) || |
| ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun))) |
| return -EINVAL; |
| |
| if (channel == SCAN_WILD_CARD) { |
| chlo = 0; |
| chhi = shost->max_channel + 1; |
| } else { |
| chlo = channel; |
| chhi = channel + 1; |
| } |
| |
| if (id == SCAN_WILD_CARD) { |
| tgtlo = 0; |
| tgthi = shost->max_id; |
| } else { |
| tgtlo = id; |
| tgthi = id + 1; |
| } |
| |
| for ( ; chlo < chhi; chlo++) |
| for ( ; tgtlo < tgthi; tgtlo++) |
| fc_user_scan_tgt(shost, chlo, tgtlo, lun); |
| |
| return 0; |
| } |
| |
| static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id, |
| int result) |
| { |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| return i->f->tsk_mgmt_response(shost, nexus, tm_id, result); |
| } |
| |
| static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result) |
| { |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| return i->f->it_nexus_response(shost, nexus, result); |
| } |
| |
| struct scsi_transport_template * |
| fc_attach_transport(struct fc_function_template *ft) |
| { |
| int count; |
| struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
| GFP_KERNEL); |
| |
| if (unlikely(!i)) |
| return NULL; |
| |
| i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
| i->t.target_attrs.ac.class = &fc_transport_class.class; |
| i->t.target_attrs.ac.match = fc_target_match; |
| i->t.target_size = sizeof(struct fc_starget_attrs); |
| transport_container_register(&i->t.target_attrs); |
| |
| i->t.host_attrs.ac.attrs = &i->host_attrs[0]; |
| i->t.host_attrs.ac.class = &fc_host_class.class; |
| i->t.host_attrs.ac.match = fc_host_match; |
| i->t.host_size = sizeof(struct fc_host_attrs); |
| if (ft->get_fc_host_stats) |
| i->t.host_attrs.statistics = &fc_statistics_group; |
| transport_container_register(&i->t.host_attrs); |
| |
| i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; |
| i->rport_attr_cont.ac.class = &fc_rport_class.class; |
| i->rport_attr_cont.ac.match = fc_rport_match; |
| transport_container_register(&i->rport_attr_cont); |
| |
| i->vport_attr_cont.ac.attrs = &i->vport_attrs[0]; |
| i->vport_attr_cont.ac.class = &fc_vport_class.class; |
| i->vport_attr_cont.ac.match = fc_vport_match; |
| transport_container_register(&i->vport_attr_cont); |
| |
| i->f = ft; |
| |
| /* Transport uses the shost workq for scsi scanning */ |
| i->t.create_work_queue = 1; |
| |
| i->t.eh_timed_out = fc_timed_out; |
| |
| i->t.user_scan = fc_user_scan; |
| |
| /* target-mode drivers' functions */ |
| i->t.tsk_mgmt_response = fc_tsk_mgmt_response; |
| i->t.it_nexus_response = fc_it_nexus_response; |
| |
| /* |
| * Setup SCSI Target Attributes. |
| */ |
| count = 0; |
| SETUP_STARGET_ATTRIBUTE_RD(node_name); |
| SETUP_STARGET_ATTRIBUTE_RD(port_name); |
| SETUP_STARGET_ATTRIBUTE_RD(port_id); |
| |
| BUG_ON(count > FC_STARGET_NUM_ATTRS); |
| |
| i->starget_attrs[count] = NULL; |
| |
| |
| /* |
| * Setup SCSI Host Attributes. |
| */ |
| count=0; |
| SETUP_HOST_ATTRIBUTE_RD(node_name); |
| SETUP_HOST_ATTRIBUTE_RD(port_name); |
| SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
| SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
| SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); |
| SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
| SETUP_HOST_ATTRIBUTE_RD(maxframe_size); |
| if (ft->vport_create) { |
| SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports); |
| SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse); |
| } |
| SETUP_HOST_ATTRIBUTE_RD(serial_number); |
| |
| SETUP_HOST_ATTRIBUTE_RD(port_id); |
| SETUP_HOST_ATTRIBUTE_RD(port_type); |
| SETUP_HOST_ATTRIBUTE_RD(port_state); |
| SETUP_HOST_ATTRIBUTE_RD(active_fc4s); |
| SETUP_HOST_ATTRIBUTE_RD(speed); |
| SETUP_HOST_ATTRIBUTE_RD(fabric_name); |
| SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
| SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
| |
| /* Transport-managed attributes */ |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); |
| if (ft->issue_fc_host_lip) |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); |
| if (ft->vport_create) |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create); |
| if (ft->vport_delete) |
| SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete); |
| |
| BUG_ON(count > FC_HOST_NUM_ATTRS); |
| |
| i->host_attrs[count] = NULL; |
| |
| /* |
| * Setup Remote Port Attributes. |
| */ |
| count=0; |
| SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); |
| SETUP_RPORT_ATTRIBUTE_RD(supported_classes); |
| SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); |
| SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); |
| |
| BUG_ON(count > FC_RPORT_NUM_ATTRS); |
| |
| i->rport_attrs[count] = NULL; |
| |
| /* |
| * Setup Virtual Port Attributes. |
| */ |
| count=0; |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state); |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state); |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name); |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name); |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles); |
| SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type); |
| SETUP_VPORT_ATTRIBUTE_RW(symbolic_name); |
| SETUP_VPORT_ATTRIBUTE_WR(vport_delete); |
| SETUP_VPORT_ATTRIBUTE_WR(vport_disable); |
| |
| BUG_ON(count > FC_VPORT_NUM_ATTRS); |
| |
| i->vport_attrs[count] = NULL; |
| |
| return &i->t; |
| } |
| EXPORT_SYMBOL(fc_attach_transport); |
| |
| void fc_release_transport(struct scsi_transport_template *t) |
| { |
| struct fc_internal *i = to_fc_internal(t); |
| |
| transport_container_unregister(&i->t.target_attrs); |
| transport_container_unregister(&i->t.host_attrs); |
| transport_container_unregister(&i->rport_attr_cont); |
| transport_container_unregister(&i->vport_attr_cont); |
| |
| kfree(i); |
| } |
| EXPORT_SYMBOL(fc_release_transport); |
| |
| /** |
| * fc_queue_work - Queue work to the fc_host workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| * @work: Work to queue for execution. |
| * |
| * Return value: |
| * 1 - work queued for execution |
| * 0 - work is already queued |
| * -EINVAL - work queue doesn't exist |
| */ |
| static int |
| fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) |
| { |
| if (unlikely(!fc_host_work_q(shost))) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to queue work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| |
| return -EINVAL; |
| } |
| |
| return queue_work(fc_host_work_q(shost), work); |
| } |
| |
| /** |
| * fc_flush_work - Flush a fc_host's workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| */ |
| static void |
| fc_flush_work(struct Scsi_Host *shost) |
| { |
| if (!fc_host_work_q(shost)) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to flush work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| return; |
| } |
| |
| flush_workqueue(fc_host_work_q(shost)); |
| } |
| |
| /** |
| * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| * @work: Work to queue for execution. |
| * @delay: jiffies to delay the work queuing |
| * |
| * Return value: |
| * 1 on success / 0 already queued / < 0 for error |
| */ |
| static int |
| fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work, |
| unsigned long delay) |
| { |
| if (unlikely(!fc_host_devloss_work_q(shost))) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to queue work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| |
| return -EINVAL; |
| } |
| |
| return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); |
| } |
| |
| /** |
| * fc_flush_devloss - Flush a fc_host's devloss workqueue. |
| * @shost: Pointer to Scsi_Host bound to fc_host. |
| */ |
| static void |
| fc_flush_devloss(struct Scsi_Host *shost) |
| { |
| if (!fc_host_devloss_work_q(shost)) { |
| printk(KERN_ERR |
| "ERROR: FC host '%s' attempted to flush work, " |
| "when no workqueue created.\n", shost->hostt->name); |
| dump_stack(); |
| return; |
| } |
| |
| flush_workqueue(fc_host_devloss_work_q(shost)); |
| } |
| |
| |
| /** |
| * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host. |
| * @shost: Which &Scsi_Host |
| * |
| * This routine is expected to be called immediately preceeding the |
| * a driver's call to scsi_remove_host(). |
| * |
| * WARNING: A driver utilizing the fc_transport, which fails to call |
| * this routine prior to scsi_remove_host(), will leave dangling |
| * objects in /sys/class/fc_remote_ports. Access to any of these |
| * objects can result in a system crash !!! |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| void |
| fc_remove_host(struct Scsi_Host *shost) |
| { |
| struct fc_vport *vport = NULL, *next_vport = NULL; |
| struct fc_rport *rport = NULL, *next_rport = NULL; |
| struct workqueue_struct *work_q; |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| /* Remove any vports */ |
| list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) |
| fc_queue_work(shost, &vport->vport_delete_work); |
| |
| /* Remove any remote ports */ |
| list_for_each_entry_safe(rport, next_rport, |
| &fc_host->rports, peers) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| |
| list_for_each_entry_safe(rport, next_rport, |
| &fc_host->rport_bindings, peers) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| fc_queue_work(shost, &rport->rport_delete_work); |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* flush all scan work items */ |
| scsi_flush_work(shost); |
| |
| /* flush all stgt delete, and rport delete work items, then kill it */ |
| if (fc_host->work_q) { |
| work_q = fc_host->work_q; |
| fc_host->work_q = NULL; |
| destroy_workqueue(work_q); |
| } |
| |
| /* flush all devloss work items, then kill it */ |
| if (fc_host->devloss_work_q) { |
| work_q = fc_host->devloss_work_q; |
| fc_host->devloss_work_q = NULL; |
| destroy_workqueue(work_q); |
| } |
| } |
| EXPORT_SYMBOL(fc_remove_host); |
| |
| static void fc_terminate_rport_io(struct fc_rport *rport) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| |
| /* Involve the LLDD if possible to terminate all io on the rport. */ |
| if (i->f->terminate_rport_io) |
| i->f->terminate_rport_io(rport); |
| |
| /* |
| * must unblock to flush queued IO. The caller will have set |
| * the port_state or flags, so that fc_remote_port_chkready will |
| * fail IO. |
| */ |
| scsi_target_unblock(&rport->dev); |
| } |
| |
| /** |
| * fc_starget_delete - called to delete the scsi decendents of an rport |
| * @work: remote port to be operated on. |
| * |
| * Deletes target and all sdevs. |
| */ |
| static void |
| fc_starget_delete(struct work_struct *work) |
| { |
| struct fc_rport *rport = |
| container_of(work, struct fc_rport, stgt_delete_work); |
| |
| fc_terminate_rport_io(rport); |
| scsi_remove_target(&rport->dev); |
| } |
| |
| |
| /** |
| * fc_rport_final_delete - finish rport termination and delete it. |
| * @work: remote port to be deleted. |
| */ |
| static void |
| fc_rport_final_delete(struct work_struct *work) |
| { |
| struct fc_rport *rport = |
| container_of(work, struct fc_rport, rport_delete_work); |
| struct device *dev = &rport->dev; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| unsigned long flags; |
| int do_callback = 0; |
| |
| /* |
| * if a scan is pending, flush the SCSI Host work_q so that |
| * that we can reclaim the rport scan work element. |
| */ |
| if (rport->flags & FC_RPORT_SCAN_PENDING) |
| scsi_flush_work(shost); |
| |
| fc_terminate_rport_io(rport); |
| |
| /* |
| * Cancel any outstanding timers. These should really exist |
| * only when rmmod'ing the LLDD and we're asking for |
| * immediate termination of the rports |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| if (!cancel_delayed_work(&rport->fail_io_work)) |
| fc_flush_devloss(shost); |
| if (!cancel_delayed_work(&rport->dev_loss_work)) |
| fc_flush_devloss(shost); |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* Delete SCSI target and sdevs */ |
| if (rport->scsi_target_id != -1) |
| fc_starget_delete(&rport->stgt_delete_work); |
| |
| /* |
| * Notify the driver that the rport is now dead. The LLDD will |
| * also guarantee that any communication to the rport is terminated |
| * |
| * Avoid this call if we already called it when we preserved the |
| * rport for the binding. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) && |
| (i->f->dev_loss_tmo_callbk)) { |
| rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; |
| do_callback = 1; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (do_callback) |
| i->f->dev_loss_tmo_callbk(rport); |
| |
| fc_bsg_remove(rport->rqst_q); |
| |
| transport_remove_device(dev); |
| device_del(dev); |
| transport_destroy_device(dev); |
| put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
| put_device(dev); /* for self-reference */ |
| } |
| |
| |
| /** |
| * fc_rport_create - allocates and creates a remote FC port. |
| * @shost: scsi host the remote port is connected to. |
| * @channel: Channel on shost port connected to. |
| * @ids: The world wide names, fc address, and FC4 port |
| * roles for the remote port. |
| * |
| * Allocates and creates the remoter port structure, including the |
| * class and sysfs creation. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| static struct fc_rport * |
| fc_rport_create(struct Scsi_Host *shost, int channel, |
| struct fc_rport_identifiers *ids) |
| { |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_internal *fci = to_fc_internal(shost->transportt); |
| struct fc_rport *rport; |
| struct device *dev; |
| unsigned long flags; |
| int error; |
| size_t size; |
| |
| size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); |
| rport = kzalloc(size, GFP_KERNEL); |
| if (unlikely(!rport)) { |
| printk(KERN_ERR "%s: allocation failure\n", __func__); |
| return NULL; |
| } |
| |
| rport->maxframe_size = -1; |
| rport->supported_classes = FC_COS_UNSPECIFIED; |
| rport->dev_loss_tmo = fc_dev_loss_tmo; |
| memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| rport->roles = ids->roles; |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| if (fci->f->dd_fcrport_size) |
| rport->dd_data = &rport[1]; |
| rport->channel = channel; |
| rport->fast_io_fail_tmo = -1; |
| |
| INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport); |
| INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io); |
| INIT_WORK(&rport->scan_work, fc_scsi_scan_rport); |
| INIT_WORK(&rport->stgt_delete_work, fc_starget_delete); |
| INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->number = fc_host->next_rport_number++; |
| if (rport->roles & FC_PORT_ROLE_FCP_TARGET) |
| rport->scsi_target_id = fc_host->next_target_id++; |
| else |
| rport->scsi_target_id = -1; |
| list_add_tail(&rport->peers, &fc_host->rports); |
| get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| dev = &rport->dev; |
| device_initialize(dev); /* takes self reference */ |
| dev->parent = get_device(&shost->shost_gendev); /* parent reference */ |
| dev->release = fc_rport_dev_release; |
| dev_set_name(dev, "rport-%d:%d-%d", |
| shost->host_no, channel, rport->number); |
| transport_setup_device(dev); |
| |
| error = device_add(dev); |
| if (error) { |
| printk(KERN_ERR "FC Remote Port device_add failed\n"); |
| goto delete_rport; |
| } |
| transport_add_device(dev); |
| transport_configure_device(dev); |
| |
| fc_bsg_rportadd(shost, rport); |
| /* ignore any bsg add error - we just can't do sgio */ |
| |
| if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
| /* initiate a scan of the target */ |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| } |
| |
| return rport; |
| |
| delete_rport: |
| transport_destroy_device(dev); |
| spin_lock_irqsave(shost->host_lock, flags); |
| list_del(&rport->peers); |
| put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| put_device(dev->parent); |
| kfree(rport); |
| return NULL; |
| } |
| |
| /** |
| * fc_remote_port_add - notify fc transport of the existence of a remote FC port. |
| * @shost: scsi host the remote port is connected to. |
| * @channel: Channel on shost port connected to. |
| * @ids: The world wide names, fc address, and FC4 port |
| * roles for the remote port. |
| * |
| * The LLDD calls this routine to notify the transport of the existence |
| * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) |
| * of the port, it's FC address (port_id), and the FC4 roles that are |
| * active for the port. |
| * |
| * For ports that are FCP targets (aka scsi targets), the FC transport |
| * maintains consistent target id bindings on behalf of the LLDD. |
| * A consistent target id binding is an assignment of a target id to |
| * a remote port identifier, which persists while the scsi host is |
| * attached. The remote port can disappear, then later reappear, and |
| * it's target id assignment remains the same. This allows for shifts |
| * in FC addressing (if binding by wwpn or wwnn) with no apparent |
| * changes to the scsi subsystem which is based on scsi host number and |
| * target id values. Bindings are only valid during the attachment of |
| * the scsi host. If the host detaches, then later re-attaches, target |
| * id bindings may change. |
| * |
| * This routine is responsible for returning a remote port structure. |
| * The routine will search the list of remote ports it maintains |
| * internally on behalf of consistent target id mappings. If found, the |
| * remote port structure will be reused. Otherwise, a new remote port |
| * structure will be allocated. |
| * |
| * Whenever a remote port is allocated, a new fc_remote_port class |
| * device is created. |
| * |
| * Should not be called from interrupt context. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| struct fc_rport * |
| fc_remote_port_add(struct Scsi_Host *shost, int channel, |
| struct fc_rport_identifiers *ids) |
| { |
| struct fc_internal *fci = to_fc_internal(shost->transportt); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_rport *rport; |
| unsigned long flags; |
| int match = 0; |
| |
| /* ensure any stgt delete functions are done */ |
| fc_flush_work(shost); |
| |
| /* |
| * Search the list of "active" rports, for an rport that has been |
| * deleted, but we've held off the real delete while the target |
| * is in a "blocked" state. |
| */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| list_for_each_entry(rport, &fc_host->rports, peers) { |
| |
| if ((rport->port_state == FC_PORTSTATE_BLOCKED) && |
| (rport->channel == channel)) { |
| |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| case FC_TGTID_BIND_NONE: |
| if (rport->port_name == ids->port_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| if (rport->node_name == ids->node_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| if (rport->port_id == ids->port_id) |
| match = 1; |
| break; |
| } |
| |
| if (match) { |
| |
| memcpy(&rport->node_name, &ids->node_name, |
| sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, |
| sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| rport->roles = ids->roles; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (fci->f->dd_fcrport_size) |
| memset(rport->dd_data, 0, |
| fci->f->dd_fcrport_size); |
| |
| /* |
| * If we were not a target, cancel the |
| * io terminate and rport timers, and |
| * we're done. |
| * |
| * If we were a target, but our new role |
| * doesn't indicate a target, leave the |
| * timers running expecting the role to |
| * change as the target fully logs in. If |
| * it doesn't, the target will be torn down. |
| * |
| * If we were a target, and our role shows |
| * we're still a target, cancel the timers |
| * and kick off a scan. |
| */ |
| |
| /* was a target, not in roles */ |
| if ((rport->scsi_target_id != -1) && |
| (!(ids->roles & FC_PORT_ROLE_FCP_TARGET))) |
| return rport; |
| |
| /* |
| * Stop the fail io and dev_loss timers. |
| * If they flush, the port_state will |
| * be checked and will NOOP the function. |
| */ |
| if (!cancel_delayed_work(&rport->fail_io_work)) |
| fc_flush_devloss(shost); |
| if (!cancel_delayed_work(&rport->dev_loss_work)) |
| fc_flush_devloss(shost); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
| FC_RPORT_DEVLOSS_PENDING | |
| FC_RPORT_DEVLOSS_CALLBK_DONE); |
| |
| /* if target, initiate a scan */ |
| if (rport->scsi_target_id != -1) { |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, |
| &rport->scan_work); |
| spin_unlock_irqrestore(shost->host_lock, |
| flags); |
| scsi_target_unblock(&rport->dev); |
| } else |
| spin_unlock_irqrestore(shost->host_lock, |
| flags); |
| |
| fc_bsg_goose_queue(rport); |
| |
| return rport; |
| } |
| } |
| } |
| |
| /* |
| * Search the bindings array |
| * Note: if never a FCP target, you won't be on this list |
| */ |
| if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
| |
| /* search for a matching consistent binding */ |
| |
| list_for_each_entry(rport, &fc_host->rport_bindings, |
| peers) { |
| if (rport->channel != channel) |
| continue; |
| |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| if (rport->port_name == ids->port_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| if (rport->node_name == ids->node_name) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| if (rport->port_id == ids->port_id) |
| match = 1; |
| break; |
| case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| break; |
| } |
| |
| if (match) { |
| list_move_tail(&rport->peers, &fc_host->rports); |
| break; |
| } |
| } |
| |
| if (match) { |
| memcpy(&rport->node_name, &ids->node_name, |
| sizeof(rport->node_name)); |
| memcpy(&rport->port_name, &ids->port_name, |
| sizeof(rport->port_name)); |
| rport->port_id = ids->port_id; |
| rport->roles = ids->roles; |
| rport->port_state = FC_PORTSTATE_ONLINE; |
| rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
| |
| if (fci->f->dd_fcrport_size) |
| memset(rport->dd_data, 0, |
| fci->f->dd_fcrport_size); |
| |
| if (rport->roles & FC_PORT_ROLE_FCP_TARGET) { |
| /* initiate a scan of the target */ |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| } else |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| return rport; |
| } |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* No consistent binding found - create new remote port entry */ |
| rport = fc_rport_create(shost, channel, ids); |
| |
| return rport; |
| } |
| EXPORT_SYMBOL(fc_remote_port_add); |
| |
| |
| /** |
| * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence. |
| * @rport: The remote port that no longer exists |
| * |
| * The LLDD calls this routine to notify the transport that a remote |
| * port is no longer part of the topology. Note: Although a port |
| * may no longer be part of the topology, it may persist in the remote |
| * ports displayed by the fc_host. We do this under 2 conditions: |
| * 1) If the port was a scsi target, we delay its deletion by "blocking" it. |
| * This allows the port to temporarily disappear, then reappear without |
| * disrupting the SCSI device tree attached to it. During the "blocked" |
| * period the port will still exist. |
| * 2) If the port was a scsi target and disappears for longer than we |
| * expect, we'll delete the port and the tear down the SCSI device tree |
| * attached to it. However, we want to semi-persist the target id assigned |
| * to that port if it eventually does exist. The port structure will |
| * remain (although with minimal information) so that the target id |
| * bindings remails. |
| * |
| * If the remote port is not an FCP Target, it will be fully torn down |
| * and deallocated, including the fc_remote_port class device. |
| * |
| * If the remote port is an FCP Target, the port will be placed in a |
| * temporary blocked state. From the LLDD's perspective, the rport no |
| * longer exists. From the SCSI midlayer's perspective, the SCSI target |
| * exists, but all sdevs on it are blocked from further I/O. The following |
| * is then expected. |
| * |
| * If the remote port does not return (signaled by a LLDD call to |
| * fc_remote_port_add()) within the dev_loss_tmo timeout, then the |
| * scsi target is removed - killing all outstanding i/o and removing the |
| * scsi devices attached ot it. The port structure will be marked Not |
| * Present and be partially cleared, leaving only enough information to |
| * recognize the remote port relative to the scsi target id binding if |
| * it later appears. The port will remain as long as there is a valid |
| * binding (e.g. until the user changes the binding type or unloads the |
| * scsi host with the binding). |
| * |
| * If the remote port returns within the dev_loss_tmo value (and matches |
| * according to the target id binding type), the port structure will be |
| * reused. If it is no longer a SCSI target, the target will be torn |
| * down. If it continues to be a SCSI target, then the target will be |
| * unblocked (allowing i/o to be resumed), and a scan will be activated |
| * to ensure that all luns are detected. |
| * |
| * Called from normal process context only - cannot be called from interrupt. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| void |
| fc_remote_port_delete(struct fc_rport *rport) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| int timeout = rport->dev_loss_tmo; |
| unsigned long flags; |
| |
| /* |
| * No need to flush the fc_host work_q's, as all adds are synchronous. |
| * |
| * We do need to reclaim the rport scan work element, so eventually |
| * (in fc_rport_final_delete()) we'll flush the scsi host work_q if |
| * there's still a scan pending. |
| */ |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| if (rport->port_state != FC_PORTSTATE_ONLINE) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return; |
| } |
| |
| /* |
| * In the past, we if this was not an FCP-Target, we would |
| * unconditionally just jump to deleting the rport. |
| * However, rports can be used as node containers by the LLDD, |
| * and its not appropriate to just terminate the rport at the |
| * first sign of a loss in connectivity. The LLDD may want to |
| * send ELS traffic to re-validate the login. If the rport is |
| * immediately deleted, it makes it inappropriate for a node |
| * container. |
| * So... we now unconditionally wait dev_loss_tmo before |
| * destroying an rport. |
| */ |
| |
| rport->port_state = FC_PORTSTATE_BLOCKED; |
| |
| rport->flags |= FC_RPORT_DEVLOSS_PENDING; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR && |
| shost->active_mode & MODE_TARGET) |
| fc_tgt_it_nexus_destroy(shost, (unsigned long)rport); |
| |
| scsi_target_block(&rport->dev); |
| |
| /* see if we need to kill io faster than waiting for device loss */ |
| if ((rport->fast_io_fail_tmo != -1) && |
| (rport->fast_io_fail_tmo < timeout)) |
| fc_queue_devloss_work(shost, &rport->fail_io_work, |
| rport->fast_io_fail_tmo * HZ); |
| |
| /* cap the length the devices can be blocked until they are deleted */ |
| fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
| } |
| EXPORT_SYMBOL(fc_remote_port_delete); |
| |
| /** |
| * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed. |
| * @rport: The remote port that changed. |
| * @roles: New roles for this port. |
| * |
| * Description: The LLDD calls this routine to notify the transport that the |
| * roles on a remote port may have changed. The largest effect of this is |
| * if a port now becomes a FCP Target, it must be allocated a |
| * scsi target id. If the port is no longer a FCP target, any |
| * scsi target id value assigned to it will persist in case the |
| * role changes back to include FCP Target. No changes in the scsi |
| * midlayer will be invoked if the role changes (in the expectation |
| * that the role will be resumed. If it doesn't normal error processing |
| * will take place). |
| * |
| * Should not be called from interrupt context. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| void |
| fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) |
| { |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| unsigned long flags; |
| int create = 0; |
| int ret; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| if (roles & FC_PORT_ROLE_FCP_TARGET) { |
| if (rport->scsi_target_id == -1) { |
| rport->scsi_target_id = fc_host->next_target_id++; |
| create = 1; |
| } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET)) |
| create = 1; |
| } else if (shost->active_mode & MODE_TARGET) { |
| ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport, |
| (char *)&rport->node_name); |
| if (ret) |
| printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n", |
| ret); |
| } |
| |
| rport->roles = roles; |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (create) { |
| /* |
| * There may have been a delete timer running on the |
| * port. Ensure that it is cancelled as we now know |
| * the port is an FCP Target. |
| * Note: we know the rport is exists and in an online |
| * state as the LLDD would not have had an rport |
| * reference to pass us. |
| * |
| * Take no action on the del_timer failure as the state |
| * machine state change will validate the |
| * transaction. |
| */ |
| if (!cancel_delayed_work(&rport->fail_io_work)) |
| fc_flush_devloss(shost); |
| if (!cancel_delayed_work(&rport->dev_loss_work)) |
| fc_flush_devloss(shost); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT | |
| FC_RPORT_DEVLOSS_PENDING); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* ensure any stgt delete functions are done */ |
| fc_flush_work(shost); |
| |
| /* initiate a scan of the target */ |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags |= FC_RPORT_SCAN_PENDING; |
| scsi_queue_work(shost, &rport->scan_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| } |
| } |
| EXPORT_SYMBOL(fc_remote_port_rolechg); |
| |
| /** |
| * fc_timeout_deleted_rport - Timeout handler for a deleted remote port. |
| * @work: rport target that failed to reappear in the allotted time. |
| * |
| * Description: An attempt to delete a remote port blocks, and if it fails |
| * to return in the allotted time this gets called. |
| */ |
| static void |
| fc_timeout_deleted_rport(struct work_struct *work) |
| { |
| struct fc_rport *rport = |
| container_of(work, struct fc_rport, dev_loss_work.work); |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| unsigned long flags; |
| int do_callback = 0; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
| |
| /* |
| * If the port is ONLINE, then it came back. If it was a SCSI |
| * target, validate it still is. If not, tear down the |
| * scsi_target on it. |
| */ |
| if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| (rport->scsi_target_id != -1) && |
| !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) { |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: no longer" |
| " a FCP target, removing starget\n"); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_unblock(&rport->dev); |
| fc_queue_work(shost, &rport->stgt_delete_work); |
| return; |
| } |
| |
| /* NOOP state - we're flushing workq's */ |
| if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: leaving" |
| " rport%s alone\n", |
| (rport->scsi_target_id != -1) ? " and starget" : ""); |
| return; |
| } |
| |
| if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) || |
| (rport->scsi_target_id == -1)) { |
| list_del(&rport->peers); |
| rport->port_state = FC_PORTSTATE_DELETED; |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: removing" |
| " rport%s\n", |
| (rport->scsi_target_id != -1) ? " and starget" : ""); |
| fc_queue_work(shost, &rport->rport_delete_work); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| return; |
| } |
| |
| dev_printk(KERN_ERR, &rport->dev, |
| "blocked FC remote port time out: removing target and " |
| "saving binding\n"); |
| |
| list_move_tail(&rport->peers, &fc_host->rport_bindings); |
| |
| /* |
| * Note: We do not remove or clear the hostdata area. This allows |
| * host-specific target data to persist along with the |
| * scsi_target_id. It's up to the host to manage it's hostdata area. |
| */ |
| |
| /* |
| * Reinitialize port attributes that may change if the port comes back. |
| */ |
| rport->maxframe_size = -1; |
| rport->supported_classes = FC_COS_UNSPECIFIED; |
| rport->roles = FC_PORT_ROLE_UNKNOWN; |
| rport->port_state = FC_PORTSTATE_NOTPRESENT; |
| rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT; |
| |
| /* |
| * Pre-emptively kill I/O rather than waiting for the work queue |
| * item to teardown the starget. (FCOE libFC folks prefer this |
| * and to have the rport_port_id still set when it's done). |
| */ |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| fc_terminate_rport_io(rport); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */ |
| |
| /* remove the identifiers that aren't used in the consisting binding */ |
| switch (fc_host->tgtid_bind_type) { |
| case FC_TGTID_BIND_BY_WWPN: |
| rport->node_name = -1; |
| rport->port_id = -1; |
| break; |
| case FC_TGTID_BIND_BY_WWNN: |
| rport->port_name = -1; |
| rport->port_id = -1; |
| break; |
| case FC_TGTID_BIND_BY_ID: |
| rport->node_name = -1; |
| rport->port_name = -1; |
| break; |
| case FC_TGTID_BIND_NONE: /* to keep compiler happy */ |
| break; |
| } |
| |
| /* |
| * As this only occurs if the remote port (scsi target) |
| * went away and didn't come back - we'll remove |
| * all attached scsi devices. |
| */ |
| rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE; |
| fc_queue_work(shost, &rport->stgt_delete_work); |
| |
| do_callback = 1; |
| } |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| /* |
| * Notify the driver that the rport is now dead. The LLDD will |
| * also guarantee that any communication to the rport is terminated |
| * |
| * Note: we set the CALLBK_DONE flag above to correspond |
| */ |
| if (do_callback && i->f->dev_loss_tmo_callbk) |
| i->f->dev_loss_tmo_callbk(rport); |
| } |
| |
| |
| /** |
| * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target. |
| * @work: rport to terminate io on. |
| * |
| * Notes: Only requests the failure of the io, not that all are flushed |
| * prior to returning. |
| */ |
| static void |
| fc_timeout_fail_rport_io(struct work_struct *work) |
| { |
| struct fc_rport *rport = |
| container_of(work, struct fc_rport, fail_io_work.work); |
| |
| if (rport->port_state != FC_PORTSTATE_BLOCKED) |
| return; |
| |
| rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT; |
| fc_terminate_rport_io(rport); |
| } |
| |
| /** |
| * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. |
| * @work: remote port to be scanned. |
| */ |
| static void |
| fc_scsi_scan_rport(struct work_struct *work) |
| { |
| struct fc_rport *rport = |
| container_of(work, struct fc_rport, scan_work); |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| unsigned long flags; |
| |
| if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
| (rport->roles & FC_PORT_ROLE_FCP_TARGET) && |
| !(i->f->disable_target_scan)) { |
| scsi_scan_target(&rport->dev, rport->channel, |
| rport->scsi_target_id, SCAN_WILD_CARD, 1); |
| } |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| rport->flags &= ~FC_RPORT_SCAN_PENDING; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| /** |
| * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport |
| * @cmnd: SCSI command that scsi_eh is trying to recover |
| * |
| * This routine can be called from a FC LLD scsi_eh callback. It |
| * blocks the scsi_eh thread until the fc_rport leaves the |
| * FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh |
| * failing recovery actions for blocked rports which would lead to |
| * offlined SCSI devices. |
| */ |
| void fc_block_scsi_eh(struct scsi_cmnd *cmnd) |
| { |
| struct Scsi_Host *shost = cmnd->device->host; |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| unsigned long flags; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| while (rport->port_state == FC_PORTSTATE_BLOCKED) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| msleep(1000); |
| spin_lock_irqsave(shost->host_lock, flags); |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| EXPORT_SYMBOL(fc_block_scsi_eh); |
| |
| /** |
| * fc_vport_setup - allocates and creates a FC virtual port. |
| * @shost: scsi host the virtual port is connected to. |
| * @channel: Channel on shost port connected to. |
| * @pdev: parent device for vport |
| * @ids: The world wide names, FC4 port roles, etc for |
| * the virtual port. |
| * @ret_vport: The pointer to the created vport. |
| * |
| * Allocates and creates the vport structure, calls the parent host |
| * to instantiate the vport, the completes w/ class and sysfs creation. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| static int |
| fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev, |
| struct fc_vport_identifiers *ids, struct fc_vport **ret_vport) |
| { |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_internal *fci = to_fc_internal(shost->transportt); |
| struct fc_vport *vport; |
| struct device *dev; |
| unsigned long flags; |
| size_t size; |
| int error; |
| |
| *ret_vport = NULL; |
| |
| if ( ! fci->f->vport_create) |
| return -ENOENT; |
| |
| size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size); |
| vport = kzalloc(size, GFP_KERNEL); |
| if (unlikely(!vport)) { |
| printk(KERN_ERR "%s: allocation failure\n", __func__); |
| return -ENOMEM; |
| } |
| |
| vport->vport_state = FC_VPORT_UNKNOWN; |
| vport->vport_last_state = FC_VPORT_UNKNOWN; |
| vport->node_name = ids->node_name; |
| vport->port_name = ids->port_name; |
| vport->roles = ids->roles; |
| vport->vport_type = ids->vport_type; |
| if (fci->f->dd_fcvport_size) |
| vport->dd_data = &vport[1]; |
| vport->shost = shost; |
| vport->channel = channel; |
| vport->flags = FC_VPORT_CREATING; |
| INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete); |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| |
| if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) { |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| kfree(vport); |
| return -ENOSPC; |
| } |
| fc_host->npiv_vports_inuse++; |
| vport->number = fc_host->next_vport_number++; |
| list_add_tail(&vport->peers, &fc_host->vports); |
| get_device(&shost->shost_gendev); /* for fc_host->vport list */ |
| |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| dev = &vport->dev; |
| device_initialize(dev); /* takes self reference */ |
| dev->parent = get_device(pdev); /* takes parent reference */ |
| dev->release = fc_vport_dev_release; |
| dev_set_name(dev, "vport-%d:%d-%d", |
| shost->host_no, channel, vport->number); |
| transport_setup_device(dev); |
| |
| error = device_add(dev); |
| if (error) { |
| printk(KERN_ERR "FC Virtual Port device_add failed\n"); |
| goto delete_vport; |
| } |
| transport_add_device(dev); |
| transport_configure_device(dev); |
| |
| error = fci->f->vport_create(vport, ids->disable); |
| if (error) { |
| printk(KERN_ERR "FC Virtual Port LLDD Create failed\n"); |
| goto delete_vport_all; |
| } |
| |
| /* |
| * if the parent isn't the physical adapter's Scsi_Host, ensure |
| * the Scsi_Host at least contains ia symlink to the vport. |
| */ |
| if (pdev != &shost->shost_gendev) { |
| error = sysfs_create_link(&shost->shost_gendev.kobj, |
| &dev->kobj, dev_name(dev)); |
| if (error) |
| printk(KERN_ERR |
| "%s: Cannot create vport symlinks for " |
| "%s, err=%d\n", |
| __func__, dev_name(dev), error); |
| } |
| spin_lock_irqsave(shost->host_lock, flags); |
| vport->flags &= ~FC_VPORT_CREATING; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| dev_printk(KERN_NOTICE, pdev, |
| "%s created via shost%d channel %d\n", dev_name(dev), |
| shost->host_no, channel); |
| |
| *ret_vport = vport; |
| |
| return 0; |
| |
| delete_vport_all: |
| transport_remove_device(dev); |
| device_del(dev); |
| delete_vport: |
| transport_destroy_device(dev); |
| spin_lock_irqsave(shost->host_lock, flags); |
| list_del(&vport->peers); |
| put_device(&shost->shost_gendev); /* for fc_host->vport list */ |
| fc_host->npiv_vports_inuse--; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| put_device(dev->parent); |
| kfree(vport); |
| |
| return error; |
| } |
| |
| /** |
| * fc_vport_create - Admin App or LLDD requests creation of a vport |
| * @shost: scsi host the virtual port is connected to. |
| * @channel: channel on shost port connected to. |
| * @ids: The world wide names, FC4 port roles, etc for |
| * the virtual port. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| struct fc_vport * |
| fc_vport_create(struct Scsi_Host *shost, int channel, |
| struct fc_vport_identifiers *ids) |
| { |
| int stat; |
| struct fc_vport *vport; |
| |
| stat = fc_vport_setup(shost, channel, &shost->shost_gendev, |
| ids, &vport); |
| return stat ? NULL : vport; |
| } |
| EXPORT_SYMBOL(fc_vport_create); |
| |
| /** |
| * fc_vport_terminate - Admin App or LLDD requests termination of a vport |
| * @vport: fc_vport to be terminated |
| * |
| * Calls the LLDD vport_delete() function, then deallocates and removes |
| * the vport from the shost and object tree. |
| * |
| * Notes: |
| * This routine assumes no locks are held on entry. |
| */ |
| int |
| fc_vport_terminate(struct fc_vport *vport) |
| { |
| struct Scsi_Host *shost = vport_to_shost(vport); |
| struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct device *dev = &vport->dev; |
| unsigned long flags; |
| int stat; |
| |
| if (i->f->vport_delete) |
| stat = i->f->vport_delete(vport); |
| else |
| stat = -ENOENT; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| vport->flags &= ~FC_VPORT_DELETING; |
| if (!stat) { |
| vport->flags |= FC_VPORT_DELETED; |
| list_del(&vport->peers); |
| fc_host->npiv_vports_inuse--; |
| put_device(&shost->shost_gendev); /* for fc_host->vport list */ |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| |
| if (stat) |
| return stat; |
| |
| if (dev->parent != &shost->shost_gendev) |
| sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev)); |
| transport_remove_device(dev); |
| device_del(dev); |
| transport_destroy_device(dev); |
| |
| /* |
| * Removing our self-reference should mean our |
| * release function gets called, which will drop the remaining |
| * parent reference and free the data structure. |
| */ |
| put_device(dev); /* for self-reference */ |
| |
| return 0; /* SUCCESS */ |
| } |
| EXPORT_SYMBOL(fc_vport_terminate); |
| |
| /** |
| * fc_vport_sched_delete - workq-based delete request for a vport |
| * @work: vport to be deleted. |
| */ |
| static void |
| fc_vport_sched_delete(struct work_struct *work) |
| { |
| struct fc_vport *vport = |
| container_of(work, struct fc_vport, vport_delete_work); |
| int stat; |
| |
| stat = fc_vport_terminate(vport); |
| if (stat) |
| dev_printk(KERN_ERR, vport->dev.parent, |
| "%s: %s could not be deleted created via " |
| "shost%d channel %d - error %d\n", __func__, |
| dev_name(&vport->dev), vport->shost->host_no, |
| vport->channel, stat); |
| } |
| |
| |
| /* |
| * BSG support |
| */ |
| |
| |
| /** |
| * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job |
| * @job: fc_bsg_job that is to be torn down |
| */ |
| static void |
| fc_destroy_bsgjob(struct fc_bsg_job *job) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&job->job_lock, flags); |
| if (job->ref_cnt) { |
| spin_unlock_irqrestore(&job->job_lock, flags); |
| return; |
| } |
| spin_unlock_irqrestore(&job->job_lock, flags); |
| |
| put_device(job->dev); /* release reference for the request */ |
| |
| kfree(job->request_payload.sg_list); |
| kfree(job->reply_payload.sg_list); |
| kfree(job); |
| } |
| |
| /** |
| * fc_bsg_jobdone - completion routine for bsg requests that the LLD has |
| * completed |
| * @job: fc_bsg_job that is complete |
| */ |
| static void |
| fc_bsg_jobdone(struct fc_bsg_job *job) |
| { |
| struct request *req = job->req; |
| struct request *rsp = req->next_rq; |
| int err; |
| |
| err = job->req->errors = job->reply->result; |
| |
| if (err < 0) |
| /* we're only returning the result field in the reply */ |
| job->req->sense_len = sizeof(uint32_t); |
| else |
| job->req->sense_len = job->reply_len; |
| |
| /* we assume all request payload was transferred, residual == 0 */ |
| req->resid_len = 0; |
| |
| if (rsp) { |
| WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len); |
| |
| /* set reply (bidi) residual */ |
| rsp->resid_len -= min(job->reply->reply_payload_rcv_len, |
| rsp->resid_len); |
| } |
| blk_complete_request(req); |
| } |
| |
| /** |
| * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests |
| * @rq: BSG request that holds the job to be destroyed |
| */ |
| static void fc_bsg_softirq_done(struct request *rq) |
| { |
| struct fc_bsg_job *job = rq->special; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&job->job_lock, flags); |
| job->state_flags |= FC_RQST_STATE_DONE; |
| job->ref_cnt--; |
| spin_unlock_irqrestore(&job->job_lock, flags); |
| |
| blk_end_request_all(rq, rq->errors); |
| fc_destroy_bsgjob(job); |
| } |
| |
| /** |
| * fc_bsg_job_timeout - handler for when a bsg request timesout |
| * @req: request that timed out |
| */ |
| static enum blk_eh_timer_return |
| fc_bsg_job_timeout(struct request *req) |
| { |
| struct fc_bsg_job *job = (void *) req->special; |
| struct Scsi_Host *shost = job->shost; |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| unsigned long flags; |
| int err = 0, done = 0; |
| |
| if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED) |
| return BLK_EH_RESET_TIMER; |
| |
| spin_lock_irqsave(&job->job_lock, flags); |
| if (job->state_flags & FC_RQST_STATE_DONE) |
| done = 1; |
| else |
| job->ref_cnt++; |
| spin_unlock_irqrestore(&job->job_lock, flags); |
| |
| if (!done && i->f->bsg_timeout) { |
| /* call LLDD to abort the i/o as it has timed out */ |
| err = i->f->bsg_timeout(job); |
| if (err == -EAGAIN) { |
| job->ref_cnt--; |
| return BLK_EH_RESET_TIMER; |
| } else if (err) |
| printk(KERN_ERR "ERROR: FC BSG request timeout - LLD " |
| "abort failed with status %d\n", err); |
| } |
| |
| /* the blk_end_sync_io() doesn't check the error */ |
| if (done) |
| return BLK_EH_NOT_HANDLED; |
| else |
| return BLK_EH_HANDLED; |
| } |
| |
| static int |
| fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req) |
| { |
| size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments); |
| |
| BUG_ON(!req->nr_phys_segments); |
| |
| buf->sg_list = kzalloc(sz, GFP_KERNEL); |
| if (!buf->sg_list) |
| return -ENOMEM; |
| sg_init_table(buf->sg_list, req->nr_phys_segments); |
| buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); |
| buf->payload_len = blk_rq_bytes(req); |
| return 0; |
| } |
| |
| |
| /** |
| * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the |
| * bsg request |
| * @shost: SCSI Host corresponding to the bsg object |
| * @rport: (optional) FC Remote Port corresponding to the bsg object |
| * @req: BSG request that needs a job structure |
| */ |
| static int |
| fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport, |
| struct request *req) |
| { |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct request *rsp = req->next_rq; |
| struct fc_bsg_job *job; |
| int ret; |
| |
| BUG_ON(req->special); |
| |
| job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size, |
| GFP_KERNEL); |
| if (!job) |
| return -ENOMEM; |
| |
| /* |
| * Note: this is a bit silly. |
| * The request gets formatted as a SGIO v4 ioctl request, which |
| * then gets reformatted as a blk request, which then gets |
| * reformatted as a fc bsg request. And on completion, we have |
| * to wrap return results such that SGIO v4 thinks it was a scsi |
| * status. I hope this was all worth it. |
| */ |
| |
| req->special = job; |
| job->shost = shost; |
| job->rport = rport; |
| job->req = req; |
| if (i->f->dd_bsg_size) |
| job->dd_data = (void *)&job[1]; |
| spin_lock_init(&job->job_lock); |
| job->request = (struct fc_bsg_request *)req->cmd; |
| job->request_len = req->cmd_len; |
| job->reply = req->sense; |
| job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer |
| * allocated */ |
| if (req->bio) { |
| ret = fc_bsg_map_buffer(&job->request_payload, req); |
| if (ret) |
| goto failjob_rls_job; |
| } |
| if (rsp && rsp->bio) { |
| ret = fc_bsg_map_buffer(&job->reply_payload, rsp); |
| if (ret) |
| goto failjob_rls_rqst_payload; |
| } |
| job->job_done = fc_bsg_jobdone; |
| if (rport) |
| job->dev = &rport->dev; |
| else |
| job->dev = &shost->shost_gendev; |
| get_device(job->dev); /* take a reference for the request */ |
| |
| job->ref_cnt = 1; |
| |
| return 0; |
| |
| |
| failjob_rls_rqst_payload: |
| kfree(job->request_payload.sg_list); |
| failjob_rls_job: |
| kfree(job); |
| return -ENOMEM; |
| } |
| |
| |
| enum fc_dispatch_result { |
| FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */ |
| FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */ |
| FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */ |
| }; |
| |
| |
| /** |
| * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD |
| * @q: fc host request queue |
| * @shost: scsi host rport attached to |
| * @job: bsg job to be processed |
| */ |
| static enum fc_dispatch_result |
| fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost, |
| struct fc_bsg_job *job) |
| { |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ |
| int ret; |
| |
| /* Validate the host command */ |
| switch (job->request->msgcode) { |
| case FC_BSG_HST_ADD_RPORT: |
| cmdlen += sizeof(struct fc_bsg_host_add_rport); |
| break; |
| |
| case FC_BSG_HST_DEL_RPORT: |
| cmdlen += sizeof(struct fc_bsg_host_del_rport); |
| break; |
| |
| case FC_BSG_HST_ELS_NOLOGIN: |
| cmdlen += sizeof(struct fc_bsg_host_els); |
| /* there better be a xmt and rcv payloads */ |
| if ((!job->request_payload.payload_len) || |
| (!job->reply_payload.payload_len)) { |
| ret = -EINVAL; |
| goto fail_host_msg; |
| } |
| break; |
| |
| case FC_BSG_HST_CT: |
| cmdlen += sizeof(struct fc_bsg_host_ct); |
| /* there better be xmt and rcv payloads */ |
| if ((!job->request_payload.payload_len) || |
| (!job->reply_payload.payload_len)) { |
| ret = -EINVAL; |
| goto fail_host_msg; |
| } |
| break; |
| |
| case FC_BSG_HST_VENDOR: |
| cmdlen += sizeof(struct fc_bsg_host_vendor); |
| if ((shost->hostt->vendor_id == 0L) || |
| (job->request->rqst_data.h_vendor.vendor_id != |
| shost->hostt->vendor_id)) { |
| ret = -ESRCH; |
| goto fail_host_msg; |
| } |
| break; |
| |
| default: |
| ret = -EBADR; |
| goto fail_host_msg; |
| } |
| |
| /* check if we really have all the request data needed */ |
| if (job->request_len < cmdlen) { |
| ret = -ENOMSG; |
| goto fail_host_msg; |
| } |
| |
| ret = i->f->bsg_request(job); |
| if (!ret) |
| return FC_DISPATCH_UNLOCKED; |
| |
| fail_host_msg: |
| /* return the errno failure code as the only status */ |
| BUG_ON(job->reply_len < sizeof(uint32_t)); |
| job->reply->reply_payload_rcv_len = 0; |
| job->reply->result = ret; |
| job->reply_len = sizeof(uint32_t); |
| fc_bsg_jobdone(job); |
| return FC_DISPATCH_UNLOCKED; |
| } |
| |
| |
| /* |
| * fc_bsg_goose_queue - restart rport queue in case it was stopped |
| * @rport: rport to be restarted |
| */ |
| static void |
| fc_bsg_goose_queue(struct fc_rport *rport) |
| { |
| int flagset; |
| unsigned long flags; |
| |
| if (!rport->rqst_q) |
| return; |
| |
| get_device(&rport->dev); |
| |
| spin_lock_irqsave(rport->rqst_q->queue_lock, flags); |
| flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) && |
| !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags); |
| if (flagset) |
| queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q); |
| __blk_run_queue(rport->rqst_q); |
| if (flagset) |
| queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q); |
| spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags); |
| |
| put_device(&rport->dev); |
| } |
| |
| |
| /** |
| * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD |
| * @q: rport request queue |
| * @shost: scsi host rport attached to |
| * @rport: rport request destined to |
| * @job: bsg job to be processed |
| */ |
| static enum fc_dispatch_result |
| fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost, |
| struct fc_rport *rport, struct fc_bsg_job *job) |
| { |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ |
| int ret; |
| |
| /* Validate the rport command */ |
| switch (job->request->msgcode) { |
| case FC_BSG_RPT_ELS: |
| cmdlen += sizeof(struct fc_bsg_rport_els); |
| goto check_bidi; |
| |
| case FC_BSG_RPT_CT: |
| cmdlen += sizeof(struct fc_bsg_rport_ct); |
| check_bidi: |
| /* there better be xmt and rcv payloads */ |
| if ((!job->request_payload.payload_len) || |
| (!job->reply_payload.payload_len)) { |
| ret = -EINVAL; |
| goto fail_rport_msg; |
| } |
| break; |
| default: |
| ret = -EBADR; |
| goto fail_rport_msg; |
| } |
| |
| /* check if we really have all the request data needed */ |
| if (job->request_len < cmdlen) { |
| ret = -ENOMSG; |
| goto fail_rport_msg; |
| } |
| |
| ret = i->f->bsg_request(job); |
| if (!ret) |
| return FC_DISPATCH_UNLOCKED; |
| |
| fail_rport_msg: |
| /* return the errno failure code as the only status */ |
| BUG_ON(job->reply_len < sizeof(uint32_t)); |
| job->reply->reply_payload_rcv_len = 0; |
| job->reply->result = ret; |
| job->reply_len = sizeof(uint32_t); |
| fc_bsg_jobdone(job); |
| return FC_DISPATCH_UNLOCKED; |
| } |
| |
| |
| /** |
| * fc_bsg_request_handler - generic handler for bsg requests |
| * @q: request queue to manage |
| * @shost: Scsi_Host related to the bsg object |
| * @rport: FC remote port related to the bsg object (optional) |
| * @dev: device structure for bsg object |
| */ |
| static void |
| fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost, |
| struct fc_rport *rport, struct device *dev) |
| { |
| struct request *req; |
| struct fc_bsg_job *job; |
| enum fc_dispatch_result ret; |
| |
| if (!get_device(dev)) |
| return; |
| |
| while (!blk_queue_plugged(q)) { |
| if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) && |
| !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) |
| break; |
| |
| req = blk_fetch_request(q); |
| if (!req) |
| break; |
| |
| if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) { |
| req->errors = -ENXIO; |
| spin_unlock_irq(q->queue_lock); |
| blk_end_request(req, -ENXIO, blk_rq_bytes(req)); |
| spin_lock_irq(q->queue_lock); |
| continue; |
| } |
| |
| spin_unlock_irq(q->queue_lock); |
| |
| ret = fc_req_to_bsgjob(shost, rport, req); |
| if (ret) { |
| req->errors = ret; |
| blk_end_request(req, ret, blk_rq_bytes(req)); |
| spin_lock_irq(q->queue_lock); |
| continue; |
| } |
| |
| job = req->special; |
| |
| /* check if we have the msgcode value at least */ |
| if (job->request_len < sizeof(uint32_t)) { |
| BUG_ON(job->reply_len < sizeof(uint32_t)); |
| job->reply->reply_payload_rcv_len = 0; |
| job->reply->result = -ENOMSG; |
| job->reply_len = sizeof(uint32_t); |
| fc_bsg_jobdone(job); |
| spin_lock_irq(q->queue_lock); |
| continue; |
| } |
| |
| /* the dispatch routines will unlock the queue_lock */ |
| if (rport) |
| ret = fc_bsg_rport_dispatch(q, shost, rport, job); |
| else |
| ret = fc_bsg_host_dispatch(q, shost, job); |
| |
| /* did dispatcher hit state that can't process any more */ |
| if (ret == FC_DISPATCH_BREAK) |
| break; |
| |
| /* did dispatcher had released the lock */ |
| if (ret == FC_DISPATCH_UNLOCKED) |
| spin_lock_irq(q->queue_lock); |
| } |
| |
| spin_unlock_irq(q->queue_lock); |
| put_device(dev); |
| spin_lock_irq(q->queue_lock); |
| } |
| |
| |
| /** |
| * fc_bsg_host_handler - handler for bsg requests for a fc host |
| * @q: fc host request queue |
| */ |
| static void |
| fc_bsg_host_handler(struct request_queue *q) |
| { |
| struct Scsi_Host *shost = q->queuedata; |
| |
| fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev); |
| } |
| |
| |
| /** |
| * fc_bsg_rport_handler - handler for bsg requests for a fc rport |
| * @q: rport request queue |
| */ |
| static void |
| fc_bsg_rport_handler(struct request_queue *q) |
| { |
| struct fc_rport *rport = q->queuedata; |
| struct Scsi_Host *shost = rport_to_shost(rport); |
| |
| fc_bsg_request_handler(q, shost, rport, &rport->dev); |
| } |
| |
| |
| /** |
| * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests |
| * @shost: shost for fc_host |
| * @fc_host: fc_host adding the structures to |
| */ |
| static int |
| fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host) |
| { |
| struct device *dev = &shost->shost_gendev; |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct request_queue *q; |
| int err; |
| char bsg_name[20]; |
| |
| fc_host->rqst_q = NULL; |
| |
| if (!i->f->bsg_request) |
| return -ENOTSUPP; |
| |
| snprintf(bsg_name, sizeof(bsg_name), |
| "fc_host%d", shost->host_no); |
| |
| q = __scsi_alloc_queue(shost, fc_bsg_host_handler); |
| if (!q) { |
| printk(KERN_ERR "fc_host%d: bsg interface failed to " |
| "initialize - no request queue\n", |
| shost->host_no); |
| return -ENOMEM; |
| } |
| |
| q->queuedata = shost; |
| queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); |
| blk_queue_softirq_done(q, fc_bsg_softirq_done); |
| blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
| blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); |
| |
| err = bsg_register_queue(q, dev, bsg_name, NULL); |
| if (err) { |
| printk(KERN_ERR "fc_host%d: bsg interface failed to " |
| "initialize - register queue\n", |
| shost->host_no); |
| blk_cleanup_queue(q); |
| return err; |
| } |
| |
| fc_host->rqst_q = q; |
| return 0; |
| } |
| |
| |
| /** |
| * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests |
| * @shost: shost that rport is attached to |
| * @rport: rport that the bsg hooks are being attached to |
| */ |
| static int |
| fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport) |
| { |
| struct device *dev = &rport->dev; |
| struct fc_internal *i = to_fc_internal(shost->transportt); |
| struct request_queue *q; |
| int err; |
| |
| rport->rqst_q = NULL; |
| |
| if (!i->f->bsg_request) |
| return -ENOTSUPP; |
| |
| q = __scsi_alloc_queue(shost, fc_bsg_rport_handler); |
| if (!q) { |
| printk(KERN_ERR "%s: bsg interface failed to " |
| "initialize - no request queue\n", |
| dev->kobj.name); |
| return -ENOMEM; |
| } |
| |
| q->queuedata = rport; |
| queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q); |
| blk_queue_softirq_done(q, fc_bsg_softirq_done); |
| blk_queue_rq_timed_out(q, fc_bsg_job_timeout); |
| blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); |
| |
| err = bsg_register_queue(q, dev, NULL, NULL); |
| if (err) { |
| printk(KERN_ERR "%s: bsg interface failed to " |
| "initialize - register queue\n", |
| dev->kobj.name); |
| blk_cleanup_queue(q); |
| return err; |
| } |
| |
| rport->rqst_q = q; |
| return 0; |
| } |
| |
| |
| /** |
| * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports |
| * @q: the request_queue that is to be torn down. |
| */ |
| static void |
| fc_bsg_remove(struct request_queue *q) |
| { |
| if (q) { |
| bsg_unregister_queue(q); |
| blk_cleanup_queue(q); |
| } |
| } |
| |
| |
| /* Original Author: Martin Hicks */ |
| MODULE_AUTHOR("James Smart"); |
| MODULE_DESCRIPTION("FC Transport Attributes"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(fc_transport_init); |
| module_exit(fc_transport_exit); |