| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| James Smart | 9036 | 65.86% | 26 | 21.67% |
| James Bottomley | 2404 | 17.52% | 13 | 10.83% |
| Michael Christie | 527 | 3.84% | 7 | 5.83% |
| Johannes Thumshirn | 269 | 1.96% | 11 | 9.17% |
| Tony Jones | 250 | 1.82% | 1 | 0.83% |
| Neerav Parikh | 225 | 1.64% | 1 | 0.83% |
| Christof Schmitt | 123 | 0.90% | 4 | 3.33% |
| Jens Axboe | 117 | 0.85% | 4 | 3.33% |
| Vasu Dev | 90 | 0.66% | 1 | 0.83% |
| Andrew Vasquez | 83 | 0.60% | 2 | 1.67% |
| Michael Reed | 81 | 0.59% | 1 | 0.83% |
| Gal Rosen | 74 | 0.54% | 1 | 0.83% |
| Christoph Hellwig | 58 | 0.42% | 7 | 5.83% |
| Hannes Reinecke | 53 | 0.39% | 9 | 7.50% |
| Steffen Maier | 43 | 0.31% | 1 | 0.83% |
| Martin Hicks | 39 | 0.28% | 1 | 0.83% |
| Kay Sievers | 30 | 0.22% | 2 | 1.67% |
| Dick Kennedy | 24 | 0.17% | 1 | 0.83% |
| David Howells | 19 | 0.14% | 1 | 0.83% |
| Bart Van Assche | 18 | 0.13% | 3 | 2.50% |
| Rob Landley | 16 | 0.12% | 1 | 0.83% |
| Cathy Avery | 16 | 0.12% | 1 | 0.83% |
| Swen Schillig | 15 | 0.11% | 1 | 0.83% |
| Nithin Nayak Sujir | 15 | 0.11% | 1 | 0.83% |
| Andy Shevchenko | 13 | 0.09% | 1 | 0.83% |
| Brian King | 10 | 0.07% | 1 | 0.83% |
| Kees Cook | 10 | 0.07% | 1 | 0.83% |
| Hong Zhi Guo | 8 | 0.06% | 1 | 0.83% |
| Neil Horman | 8 | 0.06% | 1 | 0.83% |
| Giridhar Malavali | 7 | 0.05% | 2 | 1.67% |
| Chad Dupuis | 6 | 0.04% | 1 | 0.83% |
| Andreas Herrmann | 6 | 0.04% | 1 | 0.83% |
| Harvey Harrison | 6 | 0.04% | 1 | 0.83% |
| Tyrel Datwyler | 4 | 0.03% | 1 | 0.83% |
| Arjan van de Ven | 4 | 0.03% | 1 | 0.83% |
| Tobias Klauser | 3 | 0.02% | 1 | 0.83% |
| Tejun Heo | 3 | 0.02% | 1 | 0.83% |
| Arnd Bergmann | 2 | 0.01% | 1 | 0.83% |
| Lucas De Marchi | 2 | 0.01% | 1 | 0.83% |
| Adrian Bunk | 1 | 0.01% | 1 | 0.83% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 0.83% |
| Linus Torvalds | 1 | 0.01% | 1 | 0.83% |
| Total | 13720 | 120 |
/* * 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 <linux/kernel.h> #include <linux/bsg-lib.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 <net/netlink.h> #include <scsi/scsi_netlink_fc.h> #include <scsi/scsi_bsg_fc.h> #include "scsi_priv.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 *); /* * 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."); /* * 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_32GBIT, "32 Gbit" }, { FC_PORTSPEED_20GBIT, "20 Gbit" }, { FC_PORTSPEED_40GBIT, "40 Gbit" }, { FC_PORTSPEED_50GBIT, "50 Gbit" }, { FC_PORTSPEED_100GBIT, "100 Gbit" }, { FC_PORTSPEED_25GBIT, "25 Gbit" }, { FC_PORTSPEED_64GBIT, "64 Gbit" }, { FC_PORTSPEED_128GBIT, "128 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_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" }, }; 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 29 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)); memset(fc_host->manufacturer, 0, sizeof(fc_host->manufacturer)); memset(fc_host->model, 0, sizeof(fc_host->model)); memset(fc_host->model_description, 0, sizeof(fc_host->model_description)); memset(fc_host->hardware_version, 0, sizeof(fc_host->hardware_version)); memset(fc_host->driver_version, 0, sizeof(fc_host->driver_version)); memset(fc_host->firmware_version, 0, sizeof(fc_host->firmware_version)); memset(fc_host->optionrom_version, 0, sizeof(fc_host->optionrom_version)); 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 = alloc_workqueue("%s", 0, 0, fc_host->work_q_name); if (!fc_host->work_q) return -ENOMEM; fc_host->dev_loss_tmo = fc_dev_loss_tmo; 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 = alloc_workqueue("%s", 0, 0, 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); /* * 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; int err; if (!scsi_nl_sock) { err = -ENOENT; goto send_fail; } len = FC_NL_MSGALIGN(sizeof(*event)); skb = nlmsg_new(len, GFP_KERNEL); if (!skb) { err = -ENOBUFS; goto send_fail; } nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 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 = ktime_get_real_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; int err; if (!scsi_nl_sock) { err = -ENOENT; goto send_vendor_fail; } len = FC_NL_MSGALIGN(sizeof(*event) + data_len); skb = nlmsg_new(len, GFP_KERNEL); if (!skb) { err = -ENOBUFS; goto send_vendor_fail; } nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 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 = ktime_get_real_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 */ static int fc_str_to_dev_loss(const char *buf, unsigned long *val) { char *cp; *val = simple_strtoul(buf, &cp, 0); if (*cp && (*cp != '\n')) return -EINVAL; /* * Check for overflow; dev_loss_tmo is u32 */ if (*val > UINT_MAX) return -EINVAL; return 0; } static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport, unsigned long val) { struct Scsi_Host *shost = rport_to_shost(rport); struct fc_internal *i = to_fc_internal(shost->transportt); if ((rport->port_state == FC_PORTSTATE_BLOCKED) || (rport->port_state == FC_PORTSTATE_DELETED) || (rport->port_state == FC_PORTSTATE_NOTPRESENT)) return -EBUSY; /* * Check for overflow; dev_loss_tmo is u32 */ if (val > UINT_MAX) 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 0; } 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) { struct fc_rport *rport = transport_class_to_rport(dev); unsigned long val; int rc; rc = fc_str_to_dev_loss(buf, &val); if (rc) return rc; rc = fc_rport_set_dev_loss_tmo(rport, val); if (rc) return rc; 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 hierarchy 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 | FC_VPORT_DELETING)) { 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)); fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1); fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1); fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1); fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_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); static ssize_t store_fc_private_host_dev_loss_tmo(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_rport *rport; unsigned long val, flags; int rc; rc = fc_str_to_dev_loss(buf, &val); if (rc) return rc; fc_host_dev_loss_tmo(shost) = val; spin_lock_irqsave(shost->host_lock, flags); list_for_each_entry(rport, &fc_host->rports, peers) fc_rport_set_dev_loss_tmo(rport, val); spin_unlock_irqrestore(shost->host_lock, flags); return count; } fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, ); static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR, show_fc_host_dev_loss_tmo, store_fc_private_host_dev_loss_tmo); fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20); /* * Host Statistics Management */ /* Show a given 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); fc_host_statistic(fcp_packet_alloc_failures); fc_host_statistic(fcp_packet_aborts); fc_host_statistic(fcp_frame_alloc_failures); fc_host_statistic(fc_no_free_exch); fc_host_statistic(fc_no_free_exch_xid); fc_host_statistic(fc_xid_not_found); fc_host_statistic(fc_xid_busy); fc_host_statistic(fc_seq_not_found); fc_host_statistic(fc_non_bls_resp); 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_fcp_packet_alloc_failures.attr, &device_attr_host_fcp_packet_aborts.attr, &device_attr_host_fcp_frame_alloc_failures.attr, &device_attr_host_fc_no_free_exch.attr, &device_attr_host_fc_no_free_exch_xid.attr, &device_attr_host_fc_xid_not_found.attr, &device_attr_host_fc_xid_busy.attr, &device_attr_host_fc_seq_not_found.attr, &device_attr_host_fc_non_bls_resp.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++) { int value; value = hex_to_bin(*ns++); if (value >= 0) j = (j << 4) | value; 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); } static int scsi_is_fc_vport(const struct device *dev) { return dev->release == fc_vport_dev_release; } 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_eh_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. */ enum blk_eh_timer_return fc_eh_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_DONE; } EXPORT_SYMBOL(fc_eh_timed_out); /* * 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, u64 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, SCSI_SCAN_MANUAL); 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, u64 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; } 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.user_scan = fc_user_scan; /* * 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(manufacturer); SETUP_HOST_ATTRIBUTE_RD(model); SETUP_HOST_ATTRIBUTE_RD(model_description); SETUP_HOST_ATTRIBUTE_RD(hardware_version); SETUP_HOST_ATTRIBUTE_RD(driver_version); SETUP_HOST_ATTRIBUTE_RD(firmware_version); SETUP_HOST_ATTRIBUTE_RD(optionrom_version); 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(dev_loss_tmo); 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 preceding 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) { vport->flags |= FC_VPORT_DELETING; 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. scsi-ml will fail incoming reqs. */ scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE); } /** * fc_starget_delete - called to delete the scsi descendants 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; fc_terminate_rport_io(rport); /* * 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); /* * 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); cancel_work_sync(&rport->scan_work); 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); scsi_host_put(shost); /* for fc_host->rport list */ put_device(dev); /* for self-reference */ } /** * fc_remote_port_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_remote_port_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_host->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->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR)) rport->scsi_target_id = fc_host->next_target_id++; else rport->scsi_target_id = -1; list_add_tail(&rport->peers, &fc_host->rports); scsi_host_get(shost); /* 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); scsi_host_put(shost); /* 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->port_state == FC_PORTSTATE_NOTPRESENT) && (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); spin_unlock_irqrestore(shost->host_lock, flags); /* if target, initiate a scan */ if (rport->scsi_target_id != -1) { scsi_target_unblock(&rport->dev, SDEV_RUNNING); 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); } 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->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); spin_unlock_irqrestore(shost->host_lock, flags); fc_remote_port_rolechg(rport, ids->roles); return rport; } } spin_unlock_irqrestore(shost->host_lock, flags); /* No consistent binding found - create new remote port entry */ rport = fc_remote_port_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 also remain. * * 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 to 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); unsigned long 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); 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; 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; } 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 exists and is 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 | FC_RPORT_DEVLOSS_CALLBK_DONE); spin_unlock_irqrestore(shost->host_lock, flags); /* ensure any stgt delete functions are done */ fc_flush_work(shost); scsi_target_unblock(&rport->dev, SDEV_RUNNING); /* 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); } } 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, SDEV_TRANSPORT_OFFLINE); 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, SCSI_SCAN_RESCAN); } spin_lock_irqsave(shost->host_lock, flags); rport->flags &= ~FC_RPORT_SCAN_PENDING; spin_unlock_irqrestore(shost->host_lock, flags); } /** * fc_block_rport() - Block SCSI eh thread for blocked fc_rport. * @rport: Remote port 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, or the fast_io_fail_tmo fires. This is * necessary to avoid the scsi_eh failing recovery actions for blocked * rports which would lead to offlined SCSI devices. * * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be * passed back to scsi_eh. */ int fc_block_rport(struct fc_rport *rport) { struct Scsi_Host *shost = rport_to_shost(rport); unsigned long flags; spin_lock_irqsave(shost->host_lock, flags); while (rport->port_state == FC_PORTSTATE_BLOCKED && !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) { spin_unlock_irqrestore(shost->host_lock, flags); msleep(1000); spin_lock_irqsave(shost->host_lock, flags); } spin_unlock_irqrestore(shost->host_lock, flags); if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) return FAST_IO_FAIL; return 0; } EXPORT_SYMBOL(fc_block_rport); /** * 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, or the fast_io_fail_tmo fires. This is * necessary to avoid the scsi_eh failing recovery actions for blocked * rports which would lead to offlined SCSI devices. * * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED. * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be * passed back to scsi_eh. */ int fc_block_scsi_eh(struct scsi_cmnd *cmnd) { struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); if (WARN_ON_ONCE(!rport)) return FAST_IO_FAIL; return fc_block_rport(rport); } 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, this 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); scsi_host_get(shost); /* 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 a 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); scsi_host_put(shost); /* 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--; scsi_host_put(shost); /* 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_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 bsg_job *job = blk_mq_rq_to_pdu(req); struct Scsi_Host *shost = fc_bsg_to_shost(job); struct fc_rport *rport = fc_bsg_to_rport(job); struct fc_internal *i = to_fc_internal(shost->transportt); int err = 0, inflight = 0; if (rport && rport->port_state == FC_PORTSTATE_BLOCKED) return BLK_EH_RESET_TIMER; inflight = bsg_job_get(job); if (inflight && 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) { bsg_job_put(job); 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 (inflight) blk_mq_end_request(req, BLK_STS_IOERR); return BLK_EH_DONE; } /** * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD * @shost: scsi host rport attached to * @job: bsg job to be processed */ static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job) { struct fc_internal *i = to_fc_internal(shost->transportt); struct fc_bsg_request *bsg_request = job->request; struct fc_bsg_reply *bsg_reply = job->reply; int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ int ret; /* check if we really have all the request data needed */ if (job->request_len < cmdlen) { ret = -ENOMSG; goto fail_host_msg; } /* Validate the host command */ switch (bsg_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) || (bsg_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; } ret = i->f->bsg_request(job); if (!ret) return 0; fail_host_msg: /* return the errno failure code as the only status */ BUG_ON(job->reply_len < sizeof(uint32_t)); bsg_reply->reply_payload_rcv_len = 0; bsg_reply->result = ret; job->reply_len = sizeof(uint32_t); bsg_job_done(job, bsg_reply->result, bsg_reply->reply_payload_rcv_len); return 0; } /* * 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) { struct request_queue *q = rport->rqst_q; if (q) blk_mq_run_hw_queues(q, true); } /** * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD * @shost: scsi host rport attached to * @job: bsg job to be processed */ static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job) { struct fc_internal *i = to_fc_internal(shost->transportt); struct fc_bsg_request *bsg_request = job->request; struct fc_bsg_reply *bsg_reply = job->reply; int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ int ret; /* check if we really have all the request data needed */ if (job->request_len < cmdlen) { ret = -ENOMSG; goto fail_rport_msg; } /* Validate the rport command */ switch (bsg_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; } ret = i->f->bsg_request(job); if (!ret) return 0; fail_rport_msg: /* return the errno failure code as the only status */ BUG_ON(job->reply_len < sizeof(uint32_t)); bsg_reply->reply_payload_rcv_len = 0; bsg_reply->result = ret; job->reply_len = sizeof(uint32_t); bsg_job_done(job, bsg_reply->result, bsg_reply->reply_payload_rcv_len); return 0; } static int fc_bsg_dispatch(struct bsg_job *job) { struct Scsi_Host *shost = fc_bsg_to_shost(job); if (scsi_is_fc_rport(job->dev)) return fc_bsg_rport_dispatch(shost, job); else return fc_bsg_host_dispatch(shost, job); } static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport) { if (rport->port_state == FC_PORTSTATE_BLOCKED && !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) return BLK_STS_RESOURCE; if (rport->port_state != FC_PORTSTATE_ONLINE) return BLK_STS_IOERR; return BLK_STS_OK; } static int fc_bsg_dispatch_prep(struct bsg_job *job) { struct fc_rport *rport = fc_bsg_to_rport(job); blk_status_t ret; ret = fc_bsg_rport_prep(rport); switch (ret) { case BLK_STS_OK: break; case BLK_STS_RESOURCE: return -EAGAIN; default: return -EIO; } return fc_bsg_dispatch(job); } /** * 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; 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 = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout, i->f->dd_bsg_size); if (IS_ERR(q)) { dev_err(dev, "fc_host%d: bsg interface failed to initialize - setup queue\n", shost->host_no); return PTR_ERR(q); } __scsi_init_queue(shost, q); blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT); 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; rport->rqst_q = NULL; if (!i->f->bsg_request) return -ENOTSUPP; q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep, fc_bsg_job_timeout, i->f->dd_bsg_size); if (IS_ERR(q)) { dev_err(dev, "failed to setup bsg queue\n"); return PTR_ERR(q); } __scsi_init_queue(shost, q); blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT); 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. * * Notes: * Before unregistering the queue empty any requests that are blocked * * */ static void fc_bsg_remove(struct request_queue *q) { bsg_remove_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);
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