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2835 lines
74 KiB
2835 lines
74 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. |
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* |
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* Maintained at www.Open-FCoE.org |
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*/ |
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#include <linux/module.h> |
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#include <linux/spinlock.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/ethtool.h> |
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#include <linux/if_ether.h> |
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#include <linux/if_vlan.h> |
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#include <linux/crc32.h> |
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#include <linux/slab.h> |
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#include <linux/cpu.h> |
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#include <linux/fs.h> |
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#include <linux/sysfs.h> |
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#include <linux/ctype.h> |
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#include <linux/workqueue.h> |
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#include <net/dcbnl.h> |
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#include <net/dcbevent.h> |
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#include <scsi/scsi_tcq.h> |
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#include <scsi/scsicam.h> |
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#include <scsi/scsi_transport.h> |
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#include <scsi/scsi_transport_fc.h> |
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#include <net/rtnetlink.h> |
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#include <scsi/fc/fc_encaps.h> |
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#include <scsi/fc/fc_fip.h> |
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#include <scsi/fc/fc_fcoe.h> |
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#include <scsi/libfc.h> |
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#include <scsi/fc_frame.h> |
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#include <scsi/libfcoe.h> |
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#include "fcoe.h" |
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MODULE_AUTHOR("Open-FCoE.org"); |
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MODULE_DESCRIPTION("FCoE"); |
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MODULE_LICENSE("GPL v2"); |
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/* Performance tuning parameters for fcoe */ |
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static unsigned int fcoe_ddp_min = 4096; |
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module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); |
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MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ |
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"Direct Data Placement (DDP)."); |
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unsigned int fcoe_debug_logging; |
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module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); |
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MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); |
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static unsigned int fcoe_e_d_tov = 2 * 1000; |
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module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR); |
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MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000"); |
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|
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static unsigned int fcoe_r_a_tov = 2 * 2 * 1000; |
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module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR); |
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MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000"); |
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static DEFINE_MUTEX(fcoe_config_mutex); |
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static struct workqueue_struct *fcoe_wq; |
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/* fcoe host list */ |
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/* must only by accessed under the RTNL mutex */ |
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static LIST_HEAD(fcoe_hostlist); |
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static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); |
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|
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/* Function Prototypes */ |
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static int fcoe_reset(struct Scsi_Host *); |
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static int fcoe_xmit(struct fc_lport *, struct fc_frame *); |
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static int fcoe_rcv(struct sk_buff *, struct net_device *, |
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struct packet_type *, struct net_device *); |
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static void fcoe_percpu_clean(struct fc_lport *); |
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static int fcoe_link_ok(struct fc_lport *); |
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static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); |
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static int fcoe_hostlist_add(const struct fc_lport *); |
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static void fcoe_hostlist_del(const struct fc_lport *); |
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static int fcoe_device_notification(struct notifier_block *, ulong, void *); |
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static void fcoe_dev_setup(void); |
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static void fcoe_dev_cleanup(void); |
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static struct fcoe_interface |
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*fcoe_hostlist_lookup_port(const struct net_device *); |
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static int fcoe_fip_recv(struct sk_buff *, struct net_device *, |
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struct packet_type *, struct net_device *); |
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static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, |
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struct packet_type *, struct net_device *); |
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static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); |
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static void fcoe_update_src_mac(struct fc_lport *, u8 *); |
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static u8 *fcoe_get_src_mac(struct fc_lport *); |
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static void fcoe_destroy_work(struct work_struct *); |
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static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, |
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unsigned int); |
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static int fcoe_ddp_done(struct fc_lport *, u16); |
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static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, |
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unsigned int); |
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static int fcoe_dcb_app_notification(struct notifier_block *notifier, |
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ulong event, void *ptr); |
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static bool fcoe_match(struct net_device *netdev); |
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static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); |
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static int fcoe_destroy(struct net_device *netdev); |
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static int fcoe_enable(struct net_device *netdev); |
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static int fcoe_disable(struct net_device *netdev); |
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|
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/* fcoe_syfs control interface handlers */ |
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static int fcoe_ctlr_alloc(struct net_device *netdev); |
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static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); |
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static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); |
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static struct fc_seq *fcoe_elsct_send(struct fc_lport *, |
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u32 did, struct fc_frame *, |
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unsigned int op, |
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void (*resp)(struct fc_seq *, |
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struct fc_frame *, |
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void *), |
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void *, u32 timeout); |
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static void fcoe_recv_frame(struct sk_buff *skb); |
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|
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/* notification function for packets from net device */ |
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static struct notifier_block fcoe_notifier = { |
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.notifier_call = fcoe_device_notification, |
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}; |
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|
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/* notification function for DCB events */ |
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static struct notifier_block dcb_notifier = { |
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.notifier_call = fcoe_dcb_app_notification, |
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}; |
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static struct scsi_transport_template *fcoe_nport_scsi_transport; |
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static struct scsi_transport_template *fcoe_vport_scsi_transport; |
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static int fcoe_vport_destroy(struct fc_vport *); |
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static int fcoe_vport_create(struct fc_vport *, bool disabled); |
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static int fcoe_vport_disable(struct fc_vport *, bool disable); |
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static void fcoe_set_vport_symbolic_name(struct fc_vport *); |
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static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); |
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static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); |
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static void fcoe_vport_remove(struct fc_lport *); |
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static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { |
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.set_fcoe_ctlr_mode = fcoe_ctlr_mode, |
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.set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, |
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.get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, |
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.get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, |
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.get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, |
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.get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, |
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.get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, |
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.get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, |
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.get_fcoe_fcf_selected = fcoe_fcf_get_selected, |
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.get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, |
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}; |
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static struct libfc_function_template fcoe_libfc_fcn_templ = { |
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.frame_send = fcoe_xmit, |
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.ddp_setup = fcoe_ddp_setup, |
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.ddp_done = fcoe_ddp_done, |
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.ddp_target = fcoe_ddp_target, |
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.elsct_send = fcoe_elsct_send, |
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.get_lesb = fcoe_get_lesb, |
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.lport_set_port_id = fcoe_set_port_id, |
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}; |
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static struct fc_function_template fcoe_nport_fc_functions = { |
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.show_host_node_name = 1, |
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.show_host_port_name = 1, |
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.show_host_supported_classes = 1, |
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.show_host_supported_fc4s = 1, |
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.show_host_active_fc4s = 1, |
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.show_host_maxframe_size = 1, |
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.show_host_serial_number = 1, |
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.show_host_manufacturer = 1, |
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.show_host_model = 1, |
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.show_host_model_description = 1, |
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.show_host_hardware_version = 1, |
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.show_host_driver_version = 1, |
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.show_host_firmware_version = 1, |
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.show_host_optionrom_version = 1, |
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.show_host_port_id = 1, |
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.show_host_supported_speeds = 1, |
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.get_host_speed = fc_get_host_speed, |
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.show_host_speed = 1, |
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.show_host_port_type = 1, |
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.get_host_port_state = fc_get_host_port_state, |
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.show_host_port_state = 1, |
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.show_host_symbolic_name = 1, |
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.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), |
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.show_rport_maxframe_size = 1, |
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.show_rport_supported_classes = 1, |
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.show_host_fabric_name = 1, |
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.show_starget_node_name = 1, |
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.show_starget_port_name = 1, |
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.show_starget_port_id = 1, |
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.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, |
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.show_rport_dev_loss_tmo = 1, |
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.get_fc_host_stats = fc_get_host_stats, |
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.issue_fc_host_lip = fcoe_reset, |
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.terminate_rport_io = fc_rport_terminate_io, |
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.vport_create = fcoe_vport_create, |
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.vport_delete = fcoe_vport_destroy, |
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.vport_disable = fcoe_vport_disable, |
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.set_vport_symbolic_name = fcoe_set_vport_symbolic_name, |
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.bsg_request = fc_lport_bsg_request, |
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}; |
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static struct fc_function_template fcoe_vport_fc_functions = { |
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.show_host_node_name = 1, |
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.show_host_port_name = 1, |
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.show_host_supported_classes = 1, |
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.show_host_supported_fc4s = 1, |
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.show_host_active_fc4s = 1, |
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.show_host_maxframe_size = 1, |
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.show_host_serial_number = 1, |
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.show_host_manufacturer = 1, |
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.show_host_model = 1, |
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.show_host_model_description = 1, |
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.show_host_hardware_version = 1, |
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.show_host_driver_version = 1, |
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.show_host_firmware_version = 1, |
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.show_host_optionrom_version = 1, |
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.show_host_port_id = 1, |
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.show_host_supported_speeds = 1, |
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.get_host_speed = fc_get_host_speed, |
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.show_host_speed = 1, |
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.show_host_port_type = 1, |
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.get_host_port_state = fc_get_host_port_state, |
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.show_host_port_state = 1, |
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.show_host_symbolic_name = 1, |
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.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), |
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.show_rport_maxframe_size = 1, |
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.show_rport_supported_classes = 1, |
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.show_host_fabric_name = 1, |
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.show_starget_node_name = 1, |
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.show_starget_port_name = 1, |
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.show_starget_port_id = 1, |
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.set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, |
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.show_rport_dev_loss_tmo = 1, |
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.get_fc_host_stats = fc_get_host_stats, |
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.issue_fc_host_lip = fcoe_reset, |
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.terminate_rport_io = fc_rport_terminate_io, |
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.bsg_request = fc_lport_bsg_request, |
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}; |
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static struct scsi_host_template fcoe_shost_template = { |
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.module = THIS_MODULE, |
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.name = "FCoE Driver", |
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.proc_name = FCOE_NAME, |
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.queuecommand = fc_queuecommand, |
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.eh_timed_out = fc_eh_timed_out, |
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.eh_abort_handler = fc_eh_abort, |
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.eh_device_reset_handler = fc_eh_device_reset, |
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.eh_host_reset_handler = fc_eh_host_reset, |
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.slave_alloc = fc_slave_alloc, |
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.change_queue_depth = scsi_change_queue_depth, |
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.this_id = -1, |
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.cmd_per_lun = 3, |
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.can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, |
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.sg_tablesize = SG_ALL, |
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.max_sectors = 0xffff, |
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.track_queue_depth = 1, |
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}; |
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/** |
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* fcoe_interface_setup() - Setup a FCoE interface |
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* @fcoe: The new FCoE interface |
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* @netdev: The net device that the fcoe interface is on |
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* |
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* Returns : 0 for success |
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* Locking: must be called with the RTNL mutex held |
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*/ |
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static int fcoe_interface_setup(struct fcoe_interface *fcoe, |
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struct net_device *netdev) |
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{ |
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struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
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struct netdev_hw_addr *ha; |
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struct net_device *real_dev; |
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u8 flogi_maddr[ETH_ALEN]; |
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const struct net_device_ops *ops; |
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fcoe->netdev = netdev; |
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/* Let LLD initialize for FCoE */ |
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ops = netdev->netdev_ops; |
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if (ops->ndo_fcoe_enable) { |
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if (ops->ndo_fcoe_enable(netdev)) |
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FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" |
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" specific feature for LLD.\n"); |
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} |
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|
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/* Do not support for bonding device */ |
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if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) { |
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FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); |
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return -EOPNOTSUPP; |
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} |
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/* look for SAN MAC address, if multiple SAN MACs exist, only |
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* use the first one for SPMA */ |
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real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev; |
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fcoe->realdev = real_dev; |
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rcu_read_lock(); |
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for_each_dev_addr(real_dev, ha) { |
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if ((ha->type == NETDEV_HW_ADDR_T_SAN) && |
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(is_valid_ether_addr(ha->addr))) { |
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memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); |
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fip->spma = 1; |
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break; |
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} |
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} |
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rcu_read_unlock(); |
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/* setup Source Mac Address */ |
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if (!fip->spma) |
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memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); |
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|
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/* |
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* Add FCoE MAC address as second unicast MAC address |
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* or enter promiscuous mode if not capable of listening |
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* for multiple unicast MACs. |
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*/ |
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memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
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dev_uc_add(netdev, flogi_maddr); |
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if (fip->spma) |
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dev_uc_add(netdev, fip->ctl_src_addr); |
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if (fip->mode == FIP_MODE_VN2VN) { |
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dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); |
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dev_mc_add(netdev, FIP_ALL_P2P_MACS); |
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} else |
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dev_mc_add(netdev, FIP_ALL_ENODE_MACS); |
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|
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/* |
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* setup the receive function from ethernet driver |
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* on the ethertype for the given device |
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*/ |
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fcoe->fcoe_packet_type.func = fcoe_rcv; |
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fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); |
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fcoe->fcoe_packet_type.dev = netdev; |
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dev_add_pack(&fcoe->fcoe_packet_type); |
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|
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fcoe->fip_packet_type.func = fcoe_fip_recv; |
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fcoe->fip_packet_type.type = htons(ETH_P_FIP); |
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fcoe->fip_packet_type.dev = netdev; |
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dev_add_pack(&fcoe->fip_packet_type); |
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|
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if (netdev != real_dev) { |
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fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; |
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fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); |
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fcoe->fip_vlan_packet_type.dev = real_dev; |
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dev_add_pack(&fcoe->fip_vlan_packet_type); |
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} |
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return 0; |
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} |
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|
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/** |
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* fcoe_interface_create() - Create a FCoE interface on a net device |
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* @netdev: The net device to create the FCoE interface on |
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* @fip_mode: The mode to use for FIP |
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* |
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* Returns: pointer to a struct fcoe_interface or NULL on error |
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*/ |
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static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, |
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enum fip_mode fip_mode) |
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{ |
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struct fcoe_ctlr_device *ctlr_dev; |
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struct fcoe_ctlr *ctlr; |
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struct fcoe_interface *fcoe; |
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int size; |
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int err; |
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|
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if (!try_module_get(THIS_MODULE)) { |
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FCOE_NETDEV_DBG(netdev, |
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"Could not get a reference to the module\n"); |
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fcoe = ERR_PTR(-EBUSY); |
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goto out; |
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} |
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|
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size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); |
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ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, |
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size); |
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if (!ctlr_dev) { |
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FCOE_DBG("Failed to add fcoe_ctlr_device\n"); |
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fcoe = ERR_PTR(-ENOMEM); |
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goto out_putmod; |
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} |
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|
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ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
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ctlr->cdev = ctlr_dev; |
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fcoe = fcoe_ctlr_priv(ctlr); |
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|
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dev_hold(netdev); |
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|
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/* |
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* Initialize FIP. |
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*/ |
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fcoe_ctlr_init(ctlr, fip_mode); |
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ctlr->send = fcoe_fip_send; |
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ctlr->update_mac = fcoe_update_src_mac; |
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ctlr->get_src_addr = fcoe_get_src_mac; |
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|
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err = fcoe_interface_setup(fcoe, netdev); |
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if (err) { |
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fcoe_ctlr_destroy(ctlr); |
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fcoe_ctlr_device_delete(ctlr_dev); |
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dev_put(netdev); |
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fcoe = ERR_PTR(err); |
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goto out_putmod; |
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} |
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|
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goto out; |
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out_putmod: |
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module_put(THIS_MODULE); |
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out: |
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return fcoe; |
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} |
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|
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/** |
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* fcoe_interface_remove() - remove FCoE interface from netdev |
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* @fcoe: The FCoE interface to be cleaned up |
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* |
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* Caller must be holding the RTNL mutex |
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*/ |
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static void fcoe_interface_remove(struct fcoe_interface *fcoe) |
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{ |
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struct net_device *netdev = fcoe->netdev; |
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struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
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u8 flogi_maddr[ETH_ALEN]; |
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const struct net_device_ops *ops; |
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|
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/* |
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* Don't listen for Ethernet packets anymore. |
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* synchronize_net() ensures that the packet handlers are not running |
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* on another CPU. dev_remove_pack() would do that, this calls the |
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* unsyncronized version __dev_remove_pack() to avoid multiple delays. |
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*/ |
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__dev_remove_pack(&fcoe->fcoe_packet_type); |
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__dev_remove_pack(&fcoe->fip_packet_type); |
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if (netdev != fcoe->realdev) |
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__dev_remove_pack(&fcoe->fip_vlan_packet_type); |
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synchronize_net(); |
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|
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/* Delete secondary MAC addresses */ |
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memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN); |
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dev_uc_del(netdev, flogi_maddr); |
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if (fip->spma) |
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dev_uc_del(netdev, fip->ctl_src_addr); |
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if (fip->mode == FIP_MODE_VN2VN) { |
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dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); |
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dev_mc_del(netdev, FIP_ALL_P2P_MACS); |
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} else |
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dev_mc_del(netdev, FIP_ALL_ENODE_MACS); |
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|
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/* Tell the LLD we are done w/ FCoE */ |
|
ops = netdev->netdev_ops; |
|
if (ops->ndo_fcoe_disable) { |
|
if (ops->ndo_fcoe_disable(netdev)) |
|
FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" |
|
" specific feature for LLD.\n"); |
|
} |
|
fcoe->removed = 1; |
|
} |
|
|
|
|
|
/** |
|
* fcoe_interface_cleanup() - Clean up a FCoE interface |
|
* @fcoe: The FCoE interface to be cleaned up |
|
*/ |
|
static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) |
|
{ |
|
struct net_device *netdev = fcoe->netdev; |
|
struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
|
|
|
/* Release the self-reference taken during fcoe_interface_create() */ |
|
/* tear-down the FCoE controller */ |
|
fcoe_ctlr_destroy(fip); |
|
scsi_host_put(fip->lp->host); |
|
dev_put(netdev); |
|
module_put(THIS_MODULE); |
|
} |
|
|
|
/** |
|
* fcoe_fip_recv() - Handler for received FIP frames |
|
* @skb: The receive skb |
|
* @netdev: The associated net device |
|
* @ptype: The packet_type structure which was used to register this handler |
|
* @orig_dev: The original net_device the skb was received on. |
|
* (in case dev is a bond) |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, |
|
struct packet_type *ptype, |
|
struct net_device *orig_dev) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_ctlr *ctlr; |
|
|
|
fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
fcoe_ctlr_recv(ctlr, skb); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames |
|
* @skb: The receive skb |
|
* @netdev: The associated net device |
|
* @ptype: The packet_type structure which was used to register this handler |
|
* @orig_dev: The original net_device the skb was received on. |
|
* (in case dev is a bond) |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, |
|
struct packet_type *ptype, |
|
struct net_device *orig_dev) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_ctlr *ctlr; |
|
|
|
fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
fcoe_ctlr_recv(ctlr, skb); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame |
|
* @port: The FCoE port |
|
* @skb: The FIP/FCoE packet to be sent |
|
*/ |
|
static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) |
|
{ |
|
if (port->fcoe_pending_queue.qlen) |
|
fcoe_check_wait_queue(port->lport, skb); |
|
else if (fcoe_start_io(skb)) |
|
fcoe_check_wait_queue(port->lport, skb); |
|
} |
|
|
|
/** |
|
* fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame |
|
* @fip: The FCoE controller |
|
* @skb: The FIP packet to be sent |
|
*/ |
|
static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) |
|
{ |
|
struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); |
|
struct fip_frame { |
|
struct ethhdr eth; |
|
struct fip_header fip; |
|
} __packed *frame; |
|
|
|
/* |
|
* Use default VLAN for FIP VLAN discovery protocol |
|
*/ |
|
frame = (struct fip_frame *)skb->data; |
|
if (ntohs(frame->eth.h_proto) == ETH_P_FIP && |
|
ntohs(frame->fip.fip_op) == FIP_OP_VLAN && |
|
fcoe->realdev != fcoe->netdev) |
|
skb->dev = fcoe->realdev; |
|
else |
|
skb->dev = fcoe->netdev; |
|
fcoe_port_send(lport_priv(fip->lp), skb); |
|
} |
|
|
|
/** |
|
* fcoe_update_src_mac() - Update the Ethernet MAC filters |
|
* @lport: The local port to update the source MAC on |
|
* @addr: Unicast MAC address to add |
|
* |
|
* Remove any previously-set unicast MAC filter. |
|
* Add secondary FCoE MAC address filter for our OUI. |
|
*/ |
|
static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
|
|
if (!is_zero_ether_addr(port->data_src_addr)) |
|
dev_uc_del(fcoe->netdev, port->data_src_addr); |
|
if (!is_zero_ether_addr(addr)) |
|
dev_uc_add(fcoe->netdev, addr); |
|
memcpy(port->data_src_addr, addr, ETH_ALEN); |
|
} |
|
|
|
/** |
|
* fcoe_get_src_mac() - return the Ethernet source address for an lport |
|
* @lport: libfc lport |
|
*/ |
|
static u8 *fcoe_get_src_mac(struct fc_lport *lport) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
|
|
return port->data_src_addr; |
|
} |
|
|
|
/** |
|
* fcoe_lport_config() - Set up a local port |
|
* @lport: The local port to be setup |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_lport_config(struct fc_lport *lport) |
|
{ |
|
lport->link_up = 0; |
|
lport->qfull = 0; |
|
lport->max_retry_count = 3; |
|
lport->max_rport_retry_count = 3; |
|
lport->e_d_tov = fcoe_e_d_tov; |
|
lport->r_a_tov = fcoe_r_a_tov; |
|
lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | |
|
FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); |
|
lport->does_npiv = 1; |
|
|
|
fc_lport_init_stats(lport); |
|
|
|
/* lport fc_lport related configuration */ |
|
fc_lport_config(lport); |
|
|
|
/* offload related configuration */ |
|
lport->crc_offload = 0; |
|
lport->seq_offload = 0; |
|
lport->lro_enabled = 0; |
|
lport->lro_xid = 0; |
|
lport->lso_max = 0; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* fcoe_netdev_features_change - Updates the lport's offload flags based |
|
* on the LLD netdev's FCoE feature flags |
|
*/ |
|
static void fcoe_netdev_features_change(struct fc_lport *lport, |
|
struct net_device *netdev) |
|
{ |
|
mutex_lock(&lport->lp_mutex); |
|
|
|
if (netdev->features & NETIF_F_SG) |
|
lport->sg_supp = 1; |
|
else |
|
lport->sg_supp = 0; |
|
|
|
if (netdev->features & NETIF_F_FCOE_CRC) { |
|
lport->crc_offload = 1; |
|
FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); |
|
} else { |
|
lport->crc_offload = 0; |
|
} |
|
|
|
if (netdev->features & NETIF_F_FSO) { |
|
lport->seq_offload = 1; |
|
lport->lso_max = netdev->gso_max_size; |
|
FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", |
|
lport->lso_max); |
|
} else { |
|
lport->seq_offload = 0; |
|
lport->lso_max = 0; |
|
} |
|
|
|
if (netdev->fcoe_ddp_xid) { |
|
lport->lro_enabled = 1; |
|
lport->lro_xid = netdev->fcoe_ddp_xid; |
|
FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", |
|
lport->lro_xid); |
|
} else { |
|
lport->lro_enabled = 0; |
|
lport->lro_xid = 0; |
|
} |
|
|
|
mutex_unlock(&lport->lp_mutex); |
|
} |
|
|
|
/** |
|
* fcoe_netdev_config() - Set up net devive for SW FCoE |
|
* @lport: The local port that is associated with the net device |
|
* @netdev: The associated net device |
|
* |
|
* Must be called after fcoe_lport_config() as it will use local port mutex |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) |
|
{ |
|
u32 mfs; |
|
u64 wwnn, wwpn; |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_port *port; |
|
|
|
/* Setup lport private data to point to fcoe softc */ |
|
port = lport_priv(lport); |
|
fcoe = port->priv; |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
|
|
/* Figure out the VLAN ID, if any */ |
|
if (is_vlan_dev(netdev)) |
|
lport->vlan = vlan_dev_vlan_id(netdev); |
|
else |
|
lport->vlan = 0; |
|
|
|
/* |
|
* Determine max frame size based on underlying device and optional |
|
* user-configured limit. If the MFS is too low, fcoe_link_ok() |
|
* will return 0, so do this first. |
|
*/ |
|
mfs = netdev->mtu; |
|
if (netdev->features & NETIF_F_FCOE_MTU) { |
|
mfs = FCOE_MTU; |
|
FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); |
|
} |
|
mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); |
|
if (fc_set_mfs(lport, mfs)) |
|
return -EINVAL; |
|
|
|
/* offload features support */ |
|
fcoe_netdev_features_change(lport, netdev); |
|
|
|
skb_queue_head_init(&port->fcoe_pending_queue); |
|
port->fcoe_pending_queue_active = 0; |
|
timer_setup(&port->timer, fcoe_queue_timer, 0); |
|
|
|
fcoe_link_speed_update(lport); |
|
|
|
if (!lport->vport) { |
|
if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) |
|
wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); |
|
fc_set_wwnn(lport, wwnn); |
|
if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) |
|
wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, |
|
2, 0); |
|
fc_set_wwpn(lport, wwpn); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_shost_config() - Set up the SCSI host associated with a local port |
|
* @lport: The local port |
|
* @dev: The device associated with the SCSI host |
|
* |
|
* Must be called after fcoe_lport_config() and fcoe_netdev_config() |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) |
|
{ |
|
int rc = 0; |
|
|
|
/* lport scsi host config */ |
|
lport->host->max_lun = FCOE_MAX_LUN; |
|
lport->host->max_id = FCOE_MAX_FCP_TARGET; |
|
lport->host->max_channel = 0; |
|
lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; |
|
|
|
if (lport->vport) |
|
lport->host->transportt = fcoe_vport_scsi_transport; |
|
else |
|
lport->host->transportt = fcoe_nport_scsi_transport; |
|
|
|
/* add the new host to the SCSI-ml */ |
|
rc = scsi_add_host(lport->host, dev); |
|
if (rc) { |
|
FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " |
|
"error on scsi_add_host\n"); |
|
return rc; |
|
} |
|
|
|
if (!lport->vport) |
|
fc_host_max_npiv_vports(lport->host) = USHRT_MAX; |
|
|
|
snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
|
"%s v%s over %s", FCOE_NAME, FCOE_VERSION, |
|
fcoe_netdev(lport)->name); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE |
|
* @lport: The local port that is associated with the net device |
|
* @netdev: The associated net device |
|
* |
|
* Must be called after fcoe_shost_config() as it will use local port mutex |
|
* |
|
*/ |
|
static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_port *port; |
|
struct net_device *realdev; |
|
int rc; |
|
|
|
port = lport_priv(lport); |
|
fcoe = port->priv; |
|
realdev = fcoe->realdev; |
|
|
|
/* No FDMI state m/c for NPIV ports */ |
|
if (lport->vport) |
|
return; |
|
|
|
if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { |
|
struct netdev_fcoe_hbainfo *fdmi; |
|
fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); |
|
if (!fdmi) |
|
return; |
|
|
|
rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, |
|
fdmi); |
|
if (rc) { |
|
printk(KERN_INFO "fcoe: Failed to retrieve FDMI " |
|
"information from netdev.\n"); |
|
return; |
|
} |
|
|
|
snprintf(fc_host_serial_number(lport->host), |
|
FC_SERIAL_NUMBER_SIZE, |
|
"%s", |
|
fdmi->serial_number); |
|
snprintf(fc_host_manufacturer(lport->host), |
|
FC_SERIAL_NUMBER_SIZE, |
|
"%s", |
|
fdmi->manufacturer); |
|
snprintf(fc_host_model(lport->host), |
|
FC_SYMBOLIC_NAME_SIZE, |
|
"%s", |
|
fdmi->model); |
|
snprintf(fc_host_model_description(lport->host), |
|
FC_SYMBOLIC_NAME_SIZE, |
|
"%s", |
|
fdmi->model_description); |
|
snprintf(fc_host_hardware_version(lport->host), |
|
FC_VERSION_STRING_SIZE, |
|
"%s", |
|
fdmi->hardware_version); |
|
snprintf(fc_host_driver_version(lport->host), |
|
FC_VERSION_STRING_SIZE, |
|
"%s", |
|
fdmi->driver_version); |
|
snprintf(fc_host_optionrom_version(lport->host), |
|
FC_VERSION_STRING_SIZE, |
|
"%s", |
|
fdmi->optionrom_version); |
|
snprintf(fc_host_firmware_version(lport->host), |
|
FC_VERSION_STRING_SIZE, |
|
"%s", |
|
fdmi->firmware_version); |
|
|
|
/* Enable FDMI lport states */ |
|
lport->fdmi_enabled = 1; |
|
kfree(fdmi); |
|
} else { |
|
lport->fdmi_enabled = 0; |
|
printk(KERN_INFO "fcoe: No FDMI support.\n"); |
|
} |
|
} |
|
|
|
/** |
|
* fcoe_oem_match() - The match routine for the offloaded exchange manager |
|
* @fp: The I/O frame |
|
* |
|
* This routine will be associated with an exchange manager (EM). When |
|
* the libfc exchange handling code is looking for an EM to use it will |
|
* call this routine and pass it the frame that it wishes to send. This |
|
* routine will return True if the associated EM is to be used and False |
|
* if the echange code should continue looking for an EM. |
|
* |
|
* The offload EM that this routine is associated with will handle any |
|
* packets that are for SCSI read requests. |
|
* |
|
* This has been enhanced to work when FCoE stack is operating in target |
|
* mode. |
|
* |
|
* Returns: True for read types I/O, otherwise returns false. |
|
*/ |
|
static bool fcoe_oem_match(struct fc_frame *fp) |
|
{ |
|
struct fc_frame_header *fh = fc_frame_header_get(fp); |
|
struct fcp_cmnd *fcp; |
|
|
|
if (fc_fcp_is_read(fr_fsp(fp)) && |
|
(fr_fsp(fp)->data_len > fcoe_ddp_min)) |
|
return true; |
|
else if ((fr_fsp(fp) == NULL) && |
|
(fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && |
|
(ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { |
|
fcp = fc_frame_payload_get(fp, sizeof(*fcp)); |
|
if ((fcp->fc_flags & FCP_CFL_WRDATA) && |
|
(ntohl(fcp->fc_dl) > fcoe_ddp_min)) |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* fcoe_em_config() - Allocate and configure an exchange manager |
|
* @lport: The local port that the new EM will be associated with |
|
* |
|
* Returns: 0 on success |
|
*/ |
|
static inline int fcoe_em_config(struct fc_lport *lport) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct fcoe_interface *oldfcoe = NULL; |
|
struct net_device *old_real_dev, *cur_real_dev; |
|
u16 min_xid = FCOE_MIN_XID; |
|
u16 max_xid = FCOE_MAX_XID; |
|
|
|
/* |
|
* Check if need to allocate an em instance for |
|
* offload exchange ids to be shared across all VN_PORTs/lport. |
|
*/ |
|
if (!lport->lro_enabled || !lport->lro_xid || |
|
(lport->lro_xid >= max_xid)) { |
|
lport->lro_xid = 0; |
|
goto skip_oem; |
|
} |
|
|
|
/* |
|
* Reuse existing offload em instance in case |
|
* it is already allocated on real eth device |
|
*/ |
|
if (is_vlan_dev(fcoe->netdev)) |
|
cur_real_dev = vlan_dev_real_dev(fcoe->netdev); |
|
else |
|
cur_real_dev = fcoe->netdev; |
|
|
|
list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { |
|
if (is_vlan_dev(oldfcoe->netdev)) |
|
old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); |
|
else |
|
old_real_dev = oldfcoe->netdev; |
|
|
|
if (cur_real_dev == old_real_dev) { |
|
fcoe->oem = oldfcoe->oem; |
|
break; |
|
} |
|
} |
|
|
|
if (fcoe->oem) { |
|
if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { |
|
printk(KERN_ERR "fcoe_em_config: failed to add " |
|
"offload em:%p on interface:%s\n", |
|
fcoe->oem, fcoe->netdev->name); |
|
return -ENOMEM; |
|
} |
|
} else { |
|
fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, |
|
FCOE_MIN_XID, lport->lro_xid, |
|
fcoe_oem_match); |
|
if (!fcoe->oem) { |
|
printk(KERN_ERR "fcoe_em_config: failed to allocate " |
|
"em for offload exches on interface:%s\n", |
|
fcoe->netdev->name); |
|
return -ENOMEM; |
|
} |
|
} |
|
|
|
/* |
|
* Exclude offload EM xid range from next EM xid range. |
|
*/ |
|
min_xid += lport->lro_xid + 1; |
|
|
|
skip_oem: |
|
if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { |
|
printk(KERN_ERR "fcoe_em_config: failed to " |
|
"allocate em on interface %s\n", fcoe->netdev->name); |
|
return -ENOMEM; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_if_destroy() - Tear down a SW FCoE instance |
|
* @lport: The local port to be destroyed |
|
* |
|
* Locking: Must be called with the RTNL mutex held. |
|
* |
|
*/ |
|
static void fcoe_if_destroy(struct fc_lport *lport) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct net_device *netdev = fcoe->netdev; |
|
|
|
FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); |
|
|
|
/* Logout of the fabric */ |
|
fc_fabric_logoff(lport); |
|
|
|
/* Cleanup the fc_lport */ |
|
fc_lport_destroy(lport); |
|
|
|
/* Stop the transmit retry timer */ |
|
del_timer_sync(&port->timer); |
|
|
|
/* Free existing transmit skbs */ |
|
fcoe_clean_pending_queue(lport); |
|
|
|
if (!is_zero_ether_addr(port->data_src_addr)) |
|
dev_uc_del(netdev, port->data_src_addr); |
|
if (lport->vport) |
|
synchronize_net(); |
|
else |
|
fcoe_interface_remove(fcoe); |
|
|
|
/* Free queued packets for the per-CPU receive threads */ |
|
fcoe_percpu_clean(lport); |
|
|
|
/* Detach from the scsi-ml */ |
|
fc_remove_host(lport->host); |
|
scsi_remove_host(lport->host); |
|
|
|
/* Destroy lport scsi_priv */ |
|
fc_fcp_destroy(lport); |
|
|
|
/* There are no more rports or I/O, free the EM */ |
|
fc_exch_mgr_free(lport); |
|
|
|
/* Free memory used by statistical counters */ |
|
fc_lport_free_stats(lport); |
|
|
|
/* |
|
* Release the Scsi_Host for vport but hold on to |
|
* master lport until it fcoe interface fully cleaned-up. |
|
*/ |
|
if (lport->vport) |
|
scsi_host_put(lport->host); |
|
} |
|
|
|
/** |
|
* fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device |
|
* @lport: The local port to setup DDP for |
|
* @xid: The exchange ID for this DDP transfer |
|
* @sgl: The scatterlist describing this transfer |
|
* @sgc: The number of sg items |
|
* |
|
* Returns: 0 if the DDP context was not configured |
|
*/ |
|
static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, |
|
struct scatterlist *sgl, unsigned int sgc) |
|
{ |
|
struct net_device *netdev = fcoe_netdev(lport); |
|
|
|
if (netdev->netdev_ops->ndo_fcoe_ddp_setup) |
|
return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, |
|
xid, sgl, |
|
sgc); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_ddp_target() - Call a LLD's ddp_target through the net device |
|
* @lport: The local port to setup DDP for |
|
* @xid: The exchange ID for this DDP transfer |
|
* @sgl: The scatterlist describing this transfer |
|
* @sgc: The number of sg items |
|
* |
|
* Returns: 0 if the DDP context was not configured |
|
*/ |
|
static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, |
|
struct scatterlist *sgl, unsigned int sgc) |
|
{ |
|
struct net_device *netdev = fcoe_netdev(lport); |
|
|
|
if (netdev->netdev_ops->ndo_fcoe_ddp_target) |
|
return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, |
|
sgl, sgc); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
/** |
|
* fcoe_ddp_done() - Call a LLD's ddp_done through the net device |
|
* @lport: The local port to complete DDP on |
|
* @xid: The exchange ID for this DDP transfer |
|
* |
|
* Returns: the length of data that have been completed by DDP |
|
*/ |
|
static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) |
|
{ |
|
struct net_device *netdev = fcoe_netdev(lport); |
|
|
|
if (netdev->netdev_ops->ndo_fcoe_ddp_done) |
|
return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_if_create() - Create a FCoE instance on an interface |
|
* @fcoe: The FCoE interface to create a local port on |
|
* @parent: The device pointer to be the parent in sysfs for the SCSI host |
|
* @npiv: Indicates if the port is a vport or not |
|
* |
|
* Creates a fc_lport instance and a Scsi_Host instance and configure them. |
|
* |
|
* Returns: The allocated fc_lport or an error pointer |
|
*/ |
|
static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, |
|
struct device *parent, int npiv) |
|
{ |
|
struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
|
struct net_device *netdev = fcoe->netdev; |
|
struct fc_lport *lport, *n_port; |
|
struct fcoe_port *port; |
|
struct Scsi_Host *shost; |
|
int rc; |
|
/* |
|
* parent is only a vport if npiv is 1, |
|
* but we'll only use vport in that case so go ahead and set it |
|
*/ |
|
struct fc_vport *vport = dev_to_vport(parent); |
|
|
|
FCOE_NETDEV_DBG(netdev, "Create Interface\n"); |
|
|
|
if (!npiv) |
|
lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); |
|
else |
|
lport = libfc_vport_create(vport, sizeof(*port)); |
|
|
|
if (!lport) { |
|
FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); |
|
rc = -ENOMEM; |
|
goto out; |
|
} |
|
port = lport_priv(lport); |
|
port->lport = lport; |
|
port->priv = fcoe; |
|
port->get_netdev = fcoe_netdev; |
|
port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; |
|
port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; |
|
INIT_WORK(&port->destroy_work, fcoe_destroy_work); |
|
|
|
/* |
|
* Need to add the lport to the hostlist |
|
* so we catch NETDEV_CHANGE events. |
|
*/ |
|
fcoe_hostlist_add(lport); |
|
|
|
/* configure a fc_lport including the exchange manager */ |
|
rc = fcoe_lport_config(lport); |
|
if (rc) { |
|
FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " |
|
"interface\n"); |
|
goto out_host_put; |
|
} |
|
|
|
if (npiv) { |
|
FCOE_NETDEV_DBG(netdev, "Setting vport names, " |
|
"%16.16llx %16.16llx\n", |
|
vport->node_name, vport->port_name); |
|
fc_set_wwnn(lport, vport->node_name); |
|
fc_set_wwpn(lport, vport->port_name); |
|
} |
|
|
|
/* configure lport network properties */ |
|
rc = fcoe_netdev_config(lport, netdev); |
|
if (rc) { |
|
FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " |
|
"interface\n"); |
|
goto out_lp_destroy; |
|
} |
|
|
|
/* configure lport scsi host properties */ |
|
rc = fcoe_shost_config(lport, parent); |
|
if (rc) { |
|
FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " |
|
"interface\n"); |
|
goto out_lp_destroy; |
|
} |
|
|
|
/* Initialize the library */ |
|
rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); |
|
if (rc) { |
|
FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " |
|
"interface\n"); |
|
goto out_lp_destroy; |
|
} |
|
|
|
/* Initialized FDMI information */ |
|
fcoe_fdmi_info(lport, netdev); |
|
|
|
/* |
|
* fcoe_em_alloc() and fcoe_hostlist_add() both |
|
* need to be atomic with respect to other changes to the |
|
* hostlist since fcoe_em_alloc() looks for an existing EM |
|
* instance on host list updated by fcoe_hostlist_add(). |
|
* |
|
* This is currently handled through the fcoe_config_mutex |
|
* begin held. |
|
*/ |
|
if (!npiv) |
|
/* lport exch manager allocation */ |
|
rc = fcoe_em_config(lport); |
|
else { |
|
shost = vport_to_shost(vport); |
|
n_port = shost_priv(shost); |
|
rc = fc_exch_mgr_list_clone(n_port, lport); |
|
} |
|
|
|
if (rc) { |
|
FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); |
|
goto out_lp_destroy; |
|
} |
|
|
|
return lport; |
|
|
|
out_lp_destroy: |
|
fc_exch_mgr_free(lport); |
|
out_host_put: |
|
fcoe_hostlist_del(lport); |
|
scsi_host_put(lport->host); |
|
out: |
|
return ERR_PTR(rc); |
|
} |
|
|
|
/** |
|
* fcoe_if_init() - Initialization routine for fcoe.ko |
|
* |
|
* Attaches the SW FCoE transport to the FC transport |
|
* |
|
* Returns: 0 on success |
|
*/ |
|
static int __init fcoe_if_init(void) |
|
{ |
|
/* attach to scsi transport */ |
|
fcoe_nport_scsi_transport = |
|
fc_attach_transport(&fcoe_nport_fc_functions); |
|
if (!fcoe_nport_scsi_transport) |
|
goto err; |
|
|
|
fcoe_vport_scsi_transport = |
|
fc_attach_transport(&fcoe_vport_fc_functions); |
|
if (!fcoe_vport_scsi_transport) |
|
goto err_vport; |
|
|
|
return 0; |
|
|
|
err_vport: |
|
fc_release_transport(fcoe_nport_scsi_transport); |
|
err: |
|
printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/** |
|
* fcoe_if_exit() - Tear down fcoe.ko |
|
* |
|
* Detaches the SW FCoE transport from the FC transport |
|
* |
|
* Returns: 0 on success |
|
*/ |
|
static int __exit fcoe_if_exit(void) |
|
{ |
|
fc_release_transport(fcoe_nport_scsi_transport); |
|
fc_release_transport(fcoe_vport_scsi_transport); |
|
fcoe_nport_scsi_transport = NULL; |
|
fcoe_vport_scsi_transport = NULL; |
|
return 0; |
|
} |
|
|
|
static void fcoe_thread_cleanup_local(unsigned int cpu) |
|
{ |
|
struct page *crc_eof; |
|
struct fcoe_percpu_s *p; |
|
|
|
p = per_cpu_ptr(&fcoe_percpu, cpu); |
|
spin_lock_bh(&p->fcoe_rx_list.lock); |
|
crc_eof = p->crc_eof_page; |
|
p->crc_eof_page = NULL; |
|
p->crc_eof_offset = 0; |
|
spin_unlock_bh(&p->fcoe_rx_list.lock); |
|
|
|
if (crc_eof) |
|
put_page(crc_eof); |
|
flush_work(&p->work); |
|
} |
|
|
|
/** |
|
* fcoe_select_cpu() - Selects CPU to handle post-processing of incoming |
|
* command. |
|
* |
|
* This routine selects next CPU based on cpumask to distribute |
|
* incoming requests in round robin. |
|
* |
|
* Returns: int CPU number |
|
*/ |
|
static inline unsigned int fcoe_select_cpu(void) |
|
{ |
|
static unsigned int selected_cpu; |
|
|
|
selected_cpu = cpumask_next(selected_cpu, cpu_online_mask); |
|
if (selected_cpu >= nr_cpu_ids) |
|
selected_cpu = cpumask_first(cpu_online_mask); |
|
|
|
return selected_cpu; |
|
} |
|
|
|
/** |
|
* fcoe_rcv() - Receive packets from a net device |
|
* @skb: The received packet |
|
* @netdev: The net device that the packet was received on |
|
* @ptype: The packet type context |
|
* @olddev: The last device net device |
|
* |
|
* This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a |
|
* FC frame and passes the frame to libfc. |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, |
|
struct packet_type *ptype, struct net_device *olddev) |
|
{ |
|
struct fc_lport *lport; |
|
struct fcoe_rcv_info *fr; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct fc_frame_header *fh; |
|
struct fcoe_percpu_s *fps; |
|
struct ethhdr *eh; |
|
unsigned int cpu; |
|
|
|
fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
lport = ctlr->lp; |
|
if (unlikely(!lport)) { |
|
FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); |
|
goto err2; |
|
} |
|
if (!lport->link_up) |
|
goto err2; |
|
|
|
FCOE_NETDEV_DBG(netdev, |
|
"skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", |
|
skb->len, skb->data_len, skb->head, skb->data, |
|
skb_tail_pointer(skb), skb_end_pointer(skb), |
|
skb->csum, skb->dev ? skb->dev->name : "<NULL>"); |
|
|
|
|
|
skb = skb_share_check(skb, GFP_ATOMIC); |
|
|
|
if (skb == NULL) |
|
return NET_RX_DROP; |
|
|
|
eh = eth_hdr(skb); |
|
|
|
if (is_fip_mode(ctlr) && |
|
!ether_addr_equal(eh->h_source, ctlr->dest_addr)) { |
|
FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", |
|
eh->h_source); |
|
goto err; |
|
} |
|
|
|
/* |
|
* Check for minimum frame length, and make sure required FCoE |
|
* and FC headers are pulled into the linear data area. |
|
*/ |
|
if (unlikely((skb->len < FCOE_MIN_FRAME) || |
|
!pskb_may_pull(skb, FCOE_HEADER_LEN))) |
|
goto err; |
|
|
|
skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); |
|
fh = (struct fc_frame_header *) skb_transport_header(skb); |
|
|
|
if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { |
|
FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", |
|
eh->h_dest); |
|
goto err; |
|
} |
|
|
|
fr = fcoe_dev_from_skb(skb); |
|
fr->fr_dev = lport; |
|
|
|
/* |
|
* In case the incoming frame's exchange is originated from |
|
* the initiator, then received frame's exchange id is ANDed |
|
* with fc_cpu_mask bits to get the same cpu on which exchange |
|
* was originated, otherwise select cpu using rx exchange id |
|
* or fcoe_select_cpu(). |
|
*/ |
|
if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) |
|
cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; |
|
else { |
|
if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) |
|
cpu = fcoe_select_cpu(); |
|
else |
|
cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; |
|
} |
|
|
|
if (cpu >= nr_cpu_ids) |
|
goto err; |
|
|
|
fps = &per_cpu(fcoe_percpu, cpu); |
|
spin_lock(&fps->fcoe_rx_list.lock); |
|
/* |
|
* We now have a valid CPU that we're targeting for |
|
* this skb. We also have this receive thread locked, |
|
* so we're free to queue skbs into it's queue. |
|
*/ |
|
|
|
/* |
|
* Note: We used to have a set of conditions under which we would |
|
* call fcoe_recv_frame directly, rather than queuing to the rx list |
|
* as it could save a few cycles, but doing so is prohibited, as |
|
* fcoe_recv_frame has several paths that may sleep, which is forbidden |
|
* in softirq context. |
|
*/ |
|
__skb_queue_tail(&fps->fcoe_rx_list, skb); |
|
schedule_work_on(cpu, &fps->work); |
|
spin_unlock(&fps->fcoe_rx_list.lock); |
|
|
|
return NET_RX_SUCCESS; |
|
err: |
|
per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++; |
|
put_cpu(); |
|
err2: |
|
kfree_skb(skb); |
|
return NET_RX_DROP; |
|
} |
|
|
|
/** |
|
* fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC |
|
* @skb: The packet to be transmitted |
|
* @tlen: The total length of the trailer |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) |
|
{ |
|
struct fcoe_percpu_s *fps; |
|
int rc; |
|
|
|
fps = &get_cpu_var(fcoe_percpu); |
|
rc = fcoe_get_paged_crc_eof(skb, tlen, fps); |
|
put_cpu_var(fcoe_percpu); |
|
|
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_xmit() - Transmit a FCoE frame |
|
* @lport: The local port that the frame is to be transmitted for |
|
* @fp: The frame to be transmitted |
|
* |
|
* Return: 0 for success |
|
*/ |
|
static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) |
|
{ |
|
int wlen; |
|
u32 crc; |
|
struct ethhdr *eh; |
|
struct fcoe_crc_eof *cp; |
|
struct sk_buff *skb; |
|
struct fc_stats *stats; |
|
struct fc_frame_header *fh; |
|
unsigned int hlen; /* header length implies the version */ |
|
unsigned int tlen; /* trailer length */ |
|
unsigned int elen; /* eth header, may include vlan */ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
|
u8 sof, eof; |
|
struct fcoe_hdr *hp; |
|
|
|
WARN_ON((fr_len(fp) % sizeof(u32)) != 0); |
|
|
|
fh = fc_frame_header_get(fp); |
|
skb = fp_skb(fp); |
|
wlen = skb->len / FCOE_WORD_TO_BYTE; |
|
|
|
if (!lport->link_up) { |
|
kfree_skb(skb); |
|
return 0; |
|
} |
|
|
|
if (unlikely(fh->fh_type == FC_TYPE_ELS) && |
|
fcoe_ctlr_els_send(ctlr, lport, skb)) |
|
return 0; |
|
|
|
sof = fr_sof(fp); |
|
eof = fr_eof(fp); |
|
|
|
elen = sizeof(struct ethhdr); |
|
hlen = sizeof(struct fcoe_hdr); |
|
tlen = sizeof(struct fcoe_crc_eof); |
|
wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; |
|
|
|
/* crc offload */ |
|
if (likely(lport->crc_offload)) { |
|
skb->ip_summed = CHECKSUM_PARTIAL; |
|
skb->csum_start = skb_headroom(skb); |
|
skb->csum_offset = skb->len; |
|
crc = 0; |
|
} else { |
|
skb->ip_summed = CHECKSUM_NONE; |
|
crc = fcoe_fc_crc(fp); |
|
} |
|
|
|
/* copy port crc and eof to the skb buff */ |
|
if (skb_is_nonlinear(skb)) { |
|
skb_frag_t *frag; |
|
if (fcoe_alloc_paged_crc_eof(skb, tlen)) { |
|
kfree_skb(skb); |
|
return -ENOMEM; |
|
} |
|
frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; |
|
cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); |
|
} else { |
|
cp = skb_put(skb, tlen); |
|
} |
|
|
|
memset(cp, 0, sizeof(*cp)); |
|
cp->fcoe_eof = eof; |
|
cp->fcoe_crc32 = cpu_to_le32(~crc); |
|
|
|
if (skb_is_nonlinear(skb)) { |
|
kunmap_atomic(cp); |
|
cp = NULL; |
|
} |
|
|
|
/* adjust skb network/transport offsets to match mac/fcoe/port */ |
|
skb_push(skb, elen + hlen); |
|
skb_reset_mac_header(skb); |
|
skb_reset_network_header(skb); |
|
skb->mac_len = elen; |
|
skb->protocol = htons(ETH_P_FCOE); |
|
skb->priority = fcoe->priority; |
|
|
|
if (is_vlan_dev(fcoe->netdev) && |
|
fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { |
|
/* must set skb->dev before calling vlan_put_tag */ |
|
skb->dev = fcoe->realdev; |
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
|
vlan_dev_vlan_id(fcoe->netdev)); |
|
} else |
|
skb->dev = fcoe->netdev; |
|
|
|
/* fill up mac and fcoe headers */ |
|
eh = eth_hdr(skb); |
|
eh->h_proto = htons(ETH_P_FCOE); |
|
memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); |
|
if (ctlr->map_dest) |
|
memcpy(eh->h_dest + 3, fh->fh_d_id, 3); |
|
|
|
if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) |
|
memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); |
|
else |
|
memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); |
|
|
|
hp = (struct fcoe_hdr *)(eh + 1); |
|
memset(hp, 0, sizeof(*hp)); |
|
if (FC_FCOE_VER) |
|
FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); |
|
hp->fcoe_sof = sof; |
|
|
|
/* fcoe lso, mss is in max_payload which is non-zero for FCP data */ |
|
if (lport->seq_offload && fr_max_payload(fp)) { |
|
skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; |
|
skb_shinfo(skb)->gso_size = fr_max_payload(fp); |
|
} else { |
|
skb_shinfo(skb)->gso_type = 0; |
|
skb_shinfo(skb)->gso_size = 0; |
|
} |
|
/* update tx stats: regardless if LLD fails */ |
|
stats = per_cpu_ptr(lport->stats, get_cpu()); |
|
stats->TxFrames++; |
|
stats->TxWords += wlen; |
|
put_cpu(); |
|
|
|
/* send down to lld */ |
|
fr_dev(fp) = lport; |
|
fcoe_port_send(port, skb); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC |
|
* @lport: The local port the frame was received on |
|
* @fp: The received frame |
|
* |
|
* Return: 0 on passing filtering checks |
|
*/ |
|
static inline int fcoe_filter_frames(struct fc_lport *lport, |
|
struct fc_frame *fp) |
|
{ |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct fc_frame_header *fh; |
|
struct sk_buff *skb = (struct sk_buff *)fp; |
|
struct fc_stats *stats; |
|
|
|
/* |
|
* We only check CRC if no offload is available and if it is |
|
* it's solicited data, in which case, the FCP layer would |
|
* check it during the copy. |
|
*/ |
|
if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) |
|
fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
|
else |
|
fr_flags(fp) |= FCPHF_CRC_UNCHECKED; |
|
|
|
fh = fc_frame_header_get(fp); |
|
if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) |
|
return 0; |
|
|
|
fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && |
|
ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { |
|
FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || |
|
le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { |
|
fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; |
|
return 0; |
|
} |
|
|
|
stats = per_cpu_ptr(lport->stats, get_cpu()); |
|
stats->InvalidCRCCount++; |
|
if (stats->InvalidCRCCount < 5) |
|
printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); |
|
put_cpu(); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* fcoe_recv_frame() - process a single received frame |
|
* @skb: frame to process |
|
*/ |
|
static void fcoe_recv_frame(struct sk_buff *skb) |
|
{ |
|
u32 fr_len; |
|
struct fc_lport *lport; |
|
struct fcoe_rcv_info *fr; |
|
struct fc_stats *stats; |
|
struct fcoe_crc_eof crc_eof; |
|
struct fc_frame *fp; |
|
struct fcoe_hdr *hp; |
|
|
|
fr = fcoe_dev_from_skb(skb); |
|
lport = fr->fr_dev; |
|
if (unlikely(!lport)) { |
|
FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); |
|
kfree_skb(skb); |
|
return; |
|
} |
|
|
|
FCOE_NETDEV_DBG(skb->dev, |
|
"skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", |
|
skb->len, skb->data_len, |
|
skb->head, skb->data, skb_tail_pointer(skb), |
|
skb_end_pointer(skb), skb->csum, |
|
skb->dev ? skb->dev->name : "<NULL>"); |
|
|
|
skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ |
|
|
|
/* |
|
* Frame length checks and setting up the header pointers |
|
* was done in fcoe_rcv already. |
|
*/ |
|
hp = (struct fcoe_hdr *) skb_network_header(skb); |
|
|
|
stats = per_cpu_ptr(lport->stats, get_cpu()); |
|
if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { |
|
if (stats->ErrorFrames < 5) |
|
printk(KERN_WARNING "fcoe: FCoE version " |
|
"mismatch: The frame has " |
|
"version %x, but the " |
|
"initiator supports version " |
|
"%x\n", FC_FCOE_DECAPS_VER(hp), |
|
FC_FCOE_VER); |
|
goto drop; |
|
} |
|
|
|
skb_pull(skb, sizeof(struct fcoe_hdr)); |
|
fr_len = skb->len - sizeof(struct fcoe_crc_eof); |
|
|
|
stats->RxFrames++; |
|
stats->RxWords += fr_len / FCOE_WORD_TO_BYTE; |
|
|
|
fp = (struct fc_frame *)skb; |
|
fc_frame_init(fp); |
|
fr_dev(fp) = lport; |
|
fr_sof(fp) = hp->fcoe_sof; |
|
|
|
/* Copy out the CRC and EOF trailer for access */ |
|
if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) |
|
goto drop; |
|
fr_eof(fp) = crc_eof.fcoe_eof; |
|
fr_crc(fp) = crc_eof.fcoe_crc32; |
|
if (pskb_trim(skb, fr_len)) |
|
goto drop; |
|
|
|
if (!fcoe_filter_frames(lport, fp)) { |
|
put_cpu(); |
|
fc_exch_recv(lport, fp); |
|
return; |
|
} |
|
drop: |
|
stats->ErrorFrames++; |
|
put_cpu(); |
|
kfree_skb(skb); |
|
} |
|
|
|
/** |
|
* fcoe_receive_work() - The per-CPU worker |
|
* @work: The work struct |
|
* |
|
*/ |
|
static void fcoe_receive_work(struct work_struct *work) |
|
{ |
|
struct fcoe_percpu_s *p; |
|
struct sk_buff *skb; |
|
struct sk_buff_head tmp; |
|
|
|
p = container_of(work, struct fcoe_percpu_s, work); |
|
skb_queue_head_init(&tmp); |
|
|
|
spin_lock_bh(&p->fcoe_rx_list.lock); |
|
skb_queue_splice_init(&p->fcoe_rx_list, &tmp); |
|
spin_unlock_bh(&p->fcoe_rx_list.lock); |
|
|
|
if (!skb_queue_len(&tmp)) |
|
return; |
|
|
|
while ((skb = __skb_dequeue(&tmp))) |
|
fcoe_recv_frame(skb); |
|
} |
|
|
|
/** |
|
* fcoe_dev_setup() - Setup the link change notification interface |
|
*/ |
|
static void fcoe_dev_setup(void) |
|
{ |
|
register_dcbevent_notifier(&dcb_notifier); |
|
register_netdevice_notifier(&fcoe_notifier); |
|
} |
|
|
|
/** |
|
* fcoe_dev_cleanup() - Cleanup the link change notification interface |
|
*/ |
|
static void fcoe_dev_cleanup(void) |
|
{ |
|
unregister_dcbevent_notifier(&dcb_notifier); |
|
unregister_netdevice_notifier(&fcoe_notifier); |
|
} |
|
|
|
static struct fcoe_interface * |
|
fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct net_device *real_dev; |
|
|
|
list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
|
if (is_vlan_dev(fcoe->netdev)) |
|
real_dev = vlan_dev_real_dev(fcoe->netdev); |
|
else |
|
real_dev = fcoe->netdev; |
|
|
|
if (netdev == real_dev) |
|
return fcoe; |
|
} |
|
return NULL; |
|
} |
|
|
|
static int fcoe_dcb_app_notification(struct notifier_block *notifier, |
|
ulong event, void *ptr) |
|
{ |
|
struct dcb_app_type *entry = ptr; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct net_device *netdev; |
|
int prio; |
|
|
|
if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) |
|
return NOTIFY_OK; |
|
|
|
netdev = dev_get_by_index(&init_net, entry->ifindex); |
|
if (!netdev) |
|
return NOTIFY_OK; |
|
|
|
fcoe = fcoe_hostlist_lookup_realdev_port(netdev); |
|
dev_put(netdev); |
|
if (!fcoe) |
|
return NOTIFY_OK; |
|
|
|
ctlr = fcoe_to_ctlr(fcoe); |
|
|
|
if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) |
|
prio = ffs(entry->app.priority) - 1; |
|
else |
|
prio = entry->app.priority; |
|
|
|
if (prio < 0) |
|
return NOTIFY_OK; |
|
|
|
if (entry->app.protocol == ETH_P_FIP || |
|
entry->app.protocol == ETH_P_FCOE) |
|
ctlr->priority = prio; |
|
|
|
if (entry->app.protocol == ETH_P_FCOE) |
|
fcoe->priority = prio; |
|
|
|
return NOTIFY_OK; |
|
} |
|
|
|
/** |
|
* fcoe_device_notification() - Handler for net device events |
|
* @notifier: The context of the notification |
|
* @event: The type of event |
|
* @ptr: The net device that the event was on |
|
* |
|
* This function is called by the Ethernet driver in case of link change event. |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_device_notification(struct notifier_block *notifier, |
|
ulong event, void *ptr) |
|
{ |
|
struct fcoe_ctlr_device *cdev; |
|
struct fc_lport *lport = NULL; |
|
struct net_device *netdev = netdev_notifier_info_to_dev(ptr); |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct fc_stats *stats; |
|
u32 link_possible = 1; |
|
u32 mfs; |
|
int rc = NOTIFY_OK; |
|
|
|
list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
|
if (fcoe->netdev == netdev) { |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
lport = ctlr->lp; |
|
break; |
|
} |
|
} |
|
if (!lport) { |
|
rc = NOTIFY_DONE; |
|
goto out; |
|
} |
|
|
|
switch (event) { |
|
case NETDEV_DOWN: |
|
case NETDEV_GOING_DOWN: |
|
link_possible = 0; |
|
break; |
|
case NETDEV_UP: |
|
case NETDEV_CHANGE: |
|
break; |
|
case NETDEV_CHANGEMTU: |
|
if (netdev->features & NETIF_F_FCOE_MTU) |
|
break; |
|
mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + |
|
sizeof(struct fcoe_crc_eof)); |
|
if (mfs >= FC_MIN_MAX_FRAME) |
|
fc_set_mfs(lport, mfs); |
|
break; |
|
case NETDEV_REGISTER: |
|
break; |
|
case NETDEV_UNREGISTER: |
|
list_del(&fcoe->list); |
|
fcoe_vport_remove(lport); |
|
mutex_lock(&fcoe_config_mutex); |
|
fcoe_if_destroy(lport); |
|
if (!fcoe->removed) |
|
fcoe_interface_remove(fcoe); |
|
fcoe_interface_cleanup(fcoe); |
|
mutex_unlock(&fcoe_config_mutex); |
|
fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); |
|
goto out; |
|
case NETDEV_FEAT_CHANGE: |
|
fcoe_netdev_features_change(lport, netdev); |
|
break; |
|
default: |
|
FCOE_NETDEV_DBG(netdev, "Unknown event %ld " |
|
"from netdev netlink\n", event); |
|
} |
|
|
|
fcoe_link_speed_update(lport); |
|
|
|
cdev = fcoe_ctlr_to_ctlr_dev(ctlr); |
|
|
|
if (link_possible && !fcoe_link_ok(lport)) { |
|
switch (cdev->enabled) { |
|
case FCOE_CTLR_DISABLED: |
|
pr_info("Link up while interface is disabled.\n"); |
|
break; |
|
case FCOE_CTLR_ENABLED: |
|
case FCOE_CTLR_UNUSED: |
|
fcoe_ctlr_link_up(ctlr); |
|
} |
|
} else if (fcoe_ctlr_link_down(ctlr)) { |
|
switch (cdev->enabled) { |
|
case FCOE_CTLR_DISABLED: |
|
pr_info("Link down while interface is disabled.\n"); |
|
break; |
|
case FCOE_CTLR_ENABLED: |
|
case FCOE_CTLR_UNUSED: |
|
stats = per_cpu_ptr(lport->stats, get_cpu()); |
|
stats->LinkFailureCount++; |
|
put_cpu(); |
|
fcoe_clean_pending_queue(lport); |
|
} |
|
} |
|
out: |
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_disable() - Disables a FCoE interface |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* |
|
* Called from fcoe transport. |
|
* |
|
* Returns: 0 for success |
|
* |
|
* Deprecated: use fcoe_ctlr_enabled() |
|
*/ |
|
static int fcoe_disable(struct net_device *netdev) |
|
{ |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
int rc = 0; |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
|
|
rtnl_lock(); |
|
fcoe = fcoe_hostlist_lookup_port(netdev); |
|
rtnl_unlock(); |
|
|
|
if (fcoe) { |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
fcoe_ctlr_link_down(ctlr); |
|
fcoe_clean_pending_queue(ctlr->lp); |
|
} else |
|
rc = -ENODEV; |
|
|
|
mutex_unlock(&fcoe_config_mutex); |
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_enable() - Enables a FCoE interface |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* |
|
* Called from fcoe transport. |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_enable(struct net_device *netdev) |
|
{ |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
int rc = 0; |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
rtnl_lock(); |
|
fcoe = fcoe_hostlist_lookup_port(netdev); |
|
rtnl_unlock(); |
|
|
|
if (!fcoe) { |
|
rc = -ENODEV; |
|
goto out; |
|
} |
|
|
|
ctlr = fcoe_to_ctlr(fcoe); |
|
|
|
if (!fcoe_link_ok(ctlr->lp)) |
|
fcoe_ctlr_link_up(ctlr); |
|
|
|
out: |
|
mutex_unlock(&fcoe_config_mutex); |
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_enabled() - Enable or disable an FCoE Controller |
|
* @cdev: The FCoE Controller that is being enabled or disabled |
|
* |
|
* fcoe_sysfs will ensure that the state of 'enabled' has |
|
* changed, so no checking is necessary here. This routine simply |
|
* calls fcoe_enable or fcoe_disable, both of which are deprecated. |
|
* When those routines are removed the functionality can be merged |
|
* here. |
|
*/ |
|
static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) |
|
{ |
|
struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); |
|
struct fc_lport *lport = ctlr->lp; |
|
struct net_device *netdev = fcoe_netdev(lport); |
|
|
|
switch (cdev->enabled) { |
|
case FCOE_CTLR_ENABLED: |
|
return fcoe_enable(netdev); |
|
case FCOE_CTLR_DISABLED: |
|
return fcoe_disable(netdev); |
|
case FCOE_CTLR_UNUSED: |
|
default: |
|
return -ENOTSUPP; |
|
} |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_mode() - Switch FIP mode |
|
* @ctlr_dev: The FCoE Controller that is being modified |
|
* |
|
* When the FIP mode has been changed we need to update |
|
* the multicast addresses to ensure we get the correct |
|
* frames. |
|
*/ |
|
static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) |
|
{ |
|
struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); |
|
|
|
if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && |
|
ctlr->mode != FIP_MODE_VN2VN) { |
|
dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); |
|
dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); |
|
dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); |
|
} else if (ctlr->mode != FIP_MODE_FABRIC) { |
|
dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); |
|
dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); |
|
dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); |
|
} |
|
fcoe_ctlr_set_fip_mode(ctlr_dev); |
|
} |
|
|
|
/** |
|
* fcoe_destroy() - Destroy a FCoE interface |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* |
|
* Called from fcoe transport |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_destroy(struct net_device *netdev) |
|
{ |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct fc_lport *lport; |
|
struct fcoe_port *port; |
|
int rc = 0; |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
rtnl_lock(); |
|
fcoe = fcoe_hostlist_lookup_port(netdev); |
|
if (!fcoe) { |
|
rc = -ENODEV; |
|
goto out_nodev; |
|
} |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
lport = ctlr->lp; |
|
port = lport_priv(lport); |
|
list_del(&fcoe->list); |
|
queue_work(fcoe_wq, &port->destroy_work); |
|
out_nodev: |
|
rtnl_unlock(); |
|
mutex_unlock(&fcoe_config_mutex); |
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_destroy_work() - Destroy a FCoE port in a deferred work context |
|
* @work: Handle to the FCoE port to be destroyed |
|
*/ |
|
static void fcoe_destroy_work(struct work_struct *work) |
|
{ |
|
struct fcoe_ctlr_device *cdev; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_port *port; |
|
struct fcoe_interface *fcoe; |
|
|
|
port = container_of(work, struct fcoe_port, destroy_work); |
|
|
|
fcoe_vport_remove(port->lport); |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
|
|
fcoe = port->priv; |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
cdev = fcoe_ctlr_to_ctlr_dev(ctlr); |
|
|
|
rtnl_lock(); |
|
fcoe_if_destroy(port->lport); |
|
if (!fcoe->removed) |
|
fcoe_interface_remove(fcoe); |
|
rtnl_unlock(); |
|
fcoe_interface_cleanup(fcoe); |
|
|
|
mutex_unlock(&fcoe_config_mutex); |
|
|
|
fcoe_ctlr_device_delete(cdev); |
|
} |
|
|
|
/** |
|
* fcoe_match() - Check if the FCoE is supported on the given netdevice |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* |
|
* Called from fcoe transport. |
|
* |
|
* Returns: always returns true as this is the default FCoE transport, |
|
* i.e., support all netdevs. |
|
*/ |
|
static bool fcoe_match(struct net_device *netdev) |
|
{ |
|
return true; |
|
} |
|
|
|
/** |
|
* fcoe_dcb_create() - Initialize DCB attributes and hooks |
|
* @fcoe: The new FCoE interface |
|
*/ |
|
static void fcoe_dcb_create(struct fcoe_interface *fcoe) |
|
{ |
|
int ctlr_prio = TC_PRIO_BESTEFFORT; |
|
int fcoe_prio = TC_PRIO_INTERACTIVE; |
|
struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
|
#ifdef CONFIG_DCB |
|
int dcbx; |
|
u8 fup, up; |
|
struct net_device *netdev = fcoe->realdev; |
|
struct dcb_app app = { |
|
.priority = 0, |
|
.protocol = ETH_P_FCOE |
|
}; |
|
|
|
/* setup DCB priority attributes. */ |
|
if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { |
|
dcbx = netdev->dcbnl_ops->getdcbx(netdev); |
|
|
|
if (dcbx & DCB_CAP_DCBX_VER_IEEE) { |
|
app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; |
|
up = dcb_ieee_getapp_mask(netdev, &app); |
|
app.protocol = ETH_P_FIP; |
|
fup = dcb_ieee_getapp_mask(netdev, &app); |
|
} else { |
|
app.selector = DCB_APP_IDTYPE_ETHTYPE; |
|
up = dcb_getapp(netdev, &app); |
|
app.protocol = ETH_P_FIP; |
|
fup = dcb_getapp(netdev, &app); |
|
} |
|
|
|
fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; |
|
ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; |
|
} |
|
#endif |
|
fcoe->priority = fcoe_prio; |
|
ctlr->priority = ctlr_prio; |
|
} |
|
|
|
enum fcoe_create_link_state { |
|
FCOE_CREATE_LINK_DOWN, |
|
FCOE_CREATE_LINK_UP, |
|
}; |
|
|
|
/** |
|
* _fcoe_create() - (internal) Create a fcoe interface |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* @fip_mode: The FIP mode for this creation |
|
* @link_state: The ctlr link state on creation |
|
* |
|
* Called from either the libfcoe 'create' module parameter |
|
* via fcoe_create or from fcoe_syfs's ctlr_create file. |
|
* |
|
* libfcoe's 'create' module parameter is deprecated so some |
|
* consolidation of code can be done when that interface is |
|
* removed. |
|
*/ |
|
static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, |
|
enum fcoe_create_link_state link_state) |
|
{ |
|
int rc = 0; |
|
struct fcoe_ctlr_device *ctlr_dev; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
struct fc_lport *lport; |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
rtnl_lock(); |
|
|
|
/* look for existing lport */ |
|
if (fcoe_hostlist_lookup(netdev)) { |
|
rc = -EEXIST; |
|
goto out_nodev; |
|
} |
|
|
|
fcoe = fcoe_interface_create(netdev, fip_mode); |
|
if (IS_ERR(fcoe)) { |
|
rc = PTR_ERR(fcoe); |
|
goto out_nodev; |
|
} |
|
|
|
ctlr = fcoe_to_ctlr(fcoe); |
|
ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); |
|
lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); |
|
if (IS_ERR(lport)) { |
|
printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", |
|
netdev->name); |
|
rc = -EIO; |
|
if (!fcoe->removed) |
|
fcoe_interface_remove(fcoe); |
|
rtnl_unlock(); |
|
fcoe_interface_cleanup(fcoe); |
|
mutex_unlock(&fcoe_config_mutex); |
|
fcoe_ctlr_device_delete(ctlr_dev); |
|
return rc; |
|
} |
|
|
|
/* Make this the "master" N_Port */ |
|
ctlr->lp = lport; |
|
|
|
/* setup DCB priority attributes. */ |
|
fcoe_dcb_create(fcoe); |
|
|
|
/* start FIP Discovery and FLOGI */ |
|
lport->boot_time = jiffies; |
|
fc_fabric_login(lport); |
|
|
|
/* |
|
* If the fcoe_ctlr_device is to be set to DISABLED |
|
* it must be done after the lport is added to the |
|
* hostlist, but before the rtnl_lock is released. |
|
* This is because the rtnl_lock protects the |
|
* hostlist that fcoe_device_notification uses. If |
|
* the FCoE Controller is intended to be created |
|
* DISABLED then 'enabled' needs to be considered |
|
* handling link events. 'enabled' must be set |
|
* before the lport can be found in the hostlist |
|
* when a link up event is received. |
|
*/ |
|
if (link_state == FCOE_CREATE_LINK_UP) |
|
ctlr_dev->enabled = FCOE_CTLR_ENABLED; |
|
else |
|
ctlr_dev->enabled = FCOE_CTLR_DISABLED; |
|
|
|
if (link_state == FCOE_CREATE_LINK_UP && |
|
!fcoe_link_ok(lport)) { |
|
rtnl_unlock(); |
|
fcoe_ctlr_link_up(ctlr); |
|
mutex_unlock(&fcoe_config_mutex); |
|
return rc; |
|
} |
|
|
|
out_nodev: |
|
rtnl_unlock(); |
|
mutex_unlock(&fcoe_config_mutex); |
|
|
|
return rc; |
|
} |
|
|
|
/** |
|
* fcoe_create() - Create a fcoe interface |
|
* @netdev : The net_device object the Ethernet interface to create on |
|
* @fip_mode: The FIP mode for this creation |
|
* |
|
* Called from fcoe transport |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) |
|
{ |
|
return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs |
|
* @netdev: The net_device to be used by the allocated FCoE Controller |
|
* |
|
* This routine is called from fcoe_sysfs. It will start the fcoe_ctlr |
|
* in a link_down state. The allows the user an opportunity to configure |
|
* the FCoE Controller from sysfs before enabling the FCoE Controller. |
|
* |
|
* Creating in with this routine starts the FCoE Controller in Fabric |
|
* mode. The user can change to VN2VN or another mode before enabling. |
|
*/ |
|
static int fcoe_ctlr_alloc(struct net_device *netdev) |
|
{ |
|
return _fcoe_create(netdev, FIP_MODE_FABRIC, |
|
FCOE_CREATE_LINK_DOWN); |
|
} |
|
|
|
/** |
|
* fcoe_link_ok() - Check if the link is OK for a local port |
|
* @lport: The local port to check link on |
|
* |
|
* Returns: 0 if link is UP and OK, -1 if not |
|
* |
|
*/ |
|
static int fcoe_link_ok(struct fc_lport *lport) |
|
{ |
|
struct net_device *netdev = fcoe_netdev(lport); |
|
|
|
if (netif_oper_up(netdev)) |
|
return 0; |
|
return -1; |
|
} |
|
|
|
/** |
|
* fcoe_percpu_clean() - Clear all pending skbs for an local port |
|
* @lport: The local port whose skbs are to be cleared |
|
* |
|
* Must be called with fcoe_create_mutex held to single-thread completion. |
|
* |
|
* This flushes the pending skbs by flush the work item for each CPU. The work |
|
* item on each possible CPU is flushed because we may have used the per-CPU |
|
* struct of an offline CPU. |
|
*/ |
|
static void fcoe_percpu_clean(struct fc_lport *lport) |
|
{ |
|
struct fcoe_percpu_s *pp; |
|
unsigned int cpu; |
|
|
|
for_each_possible_cpu(cpu) { |
|
pp = &per_cpu(fcoe_percpu, cpu); |
|
|
|
flush_work(&pp->work); |
|
} |
|
} |
|
|
|
/** |
|
* fcoe_reset() - Reset a local port |
|
* @shost: The SCSI host associated with the local port to be reset |
|
* |
|
* Returns: Always 0 (return value required by FC transport template) |
|
*/ |
|
static int fcoe_reset(struct Scsi_Host *shost) |
|
{ |
|
struct fc_lport *lport = shost_priv(shost); |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
|
struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); |
|
|
|
fcoe_ctlr_link_down(ctlr); |
|
fcoe_clean_pending_queue(ctlr->lp); |
|
|
|
if (cdev->enabled != FCOE_CTLR_DISABLED && |
|
!fcoe_link_ok(ctlr->lp)) |
|
fcoe_ctlr_link_up(ctlr); |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device |
|
* @netdev: The net device used as a key |
|
* |
|
* Locking: Must be called with the RNL mutex held. |
|
* |
|
* Returns: NULL or the FCoE interface |
|
*/ |
|
static struct fcoe_interface * |
|
fcoe_hostlist_lookup_port(const struct net_device *netdev) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
|
|
list_for_each_entry(fcoe, &fcoe_hostlist, list) { |
|
if (fcoe->netdev == netdev) |
|
return fcoe; |
|
} |
|
return NULL; |
|
} |
|
|
|
/** |
|
* fcoe_hostlist_lookup() - Find the local port associated with a |
|
* given net device |
|
* @netdev: The netdevice used as a key |
|
* |
|
* Locking: Must be called with the RTNL mutex held |
|
* |
|
* Returns: NULL or the local port |
|
*/ |
|
static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) |
|
{ |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_interface *fcoe; |
|
|
|
fcoe = fcoe_hostlist_lookup_port(netdev); |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
return (fcoe) ? ctlr->lp : NULL; |
|
} |
|
|
|
/** |
|
* fcoe_hostlist_add() - Add the FCoE interface identified by a local |
|
* port to the hostlist |
|
* @lport: The local port that identifies the FCoE interface to be added |
|
* |
|
* Locking: must be called with the RTNL mutex held |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_hostlist_add(const struct fc_lport *lport) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_port *port; |
|
|
|
fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); |
|
if (!fcoe) { |
|
port = lport_priv(lport); |
|
fcoe = port->priv; |
|
list_add_tail(&fcoe->list, &fcoe_hostlist); |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_hostlist_del() - Remove the FCoE interface identified by a local |
|
* port to the hostlist |
|
* @lport: The local port that identifies the FCoE interface to be added |
|
* |
|
* Locking: must be called with the RTNL mutex held |
|
* |
|
*/ |
|
static void fcoe_hostlist_del(const struct fc_lport *lport) |
|
{ |
|
struct fcoe_interface *fcoe; |
|
struct fcoe_port *port; |
|
|
|
port = lport_priv(lport); |
|
fcoe = port->priv; |
|
list_del(&fcoe->list); |
|
return; |
|
} |
|
|
|
static struct fcoe_transport fcoe_sw_transport = { |
|
.name = {FCOE_TRANSPORT_DEFAULT}, |
|
.attached = false, |
|
.list = LIST_HEAD_INIT(fcoe_sw_transport.list), |
|
.match = fcoe_match, |
|
.alloc = fcoe_ctlr_alloc, |
|
.create = fcoe_create, |
|
.destroy = fcoe_destroy, |
|
.enable = fcoe_enable, |
|
.disable = fcoe_disable, |
|
}; |
|
|
|
/** |
|
* fcoe_init() - Initialize fcoe.ko |
|
* |
|
* Returns: 0 on success, or a negative value on failure |
|
*/ |
|
static int __init fcoe_init(void) |
|
{ |
|
struct fcoe_percpu_s *p; |
|
unsigned int cpu; |
|
int rc = 0; |
|
|
|
fcoe_wq = alloc_workqueue("fcoe", 0, 0); |
|
if (!fcoe_wq) |
|
return -ENOMEM; |
|
|
|
/* register as a fcoe transport */ |
|
rc = fcoe_transport_attach(&fcoe_sw_transport); |
|
if (rc) { |
|
printk(KERN_ERR "failed to register an fcoe transport, check " |
|
"if libfcoe is loaded\n"); |
|
goto out_destroy; |
|
} |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
|
|
for_each_possible_cpu(cpu) { |
|
p = per_cpu_ptr(&fcoe_percpu, cpu); |
|
INIT_WORK(&p->work, fcoe_receive_work); |
|
skb_queue_head_init(&p->fcoe_rx_list); |
|
} |
|
|
|
/* Setup link change notification */ |
|
fcoe_dev_setup(); |
|
|
|
rc = fcoe_if_init(); |
|
if (rc) |
|
goto out_free; |
|
|
|
mutex_unlock(&fcoe_config_mutex); |
|
return 0; |
|
|
|
out_free: |
|
mutex_unlock(&fcoe_config_mutex); |
|
out_destroy: |
|
destroy_workqueue(fcoe_wq); |
|
return rc; |
|
} |
|
module_init(fcoe_init); |
|
|
|
/** |
|
* fcoe_exit() - Clean up fcoe.ko |
|
* |
|
* Returns: 0 on success or a negative value on failure |
|
*/ |
|
static void __exit fcoe_exit(void) |
|
{ |
|
struct fcoe_interface *fcoe, *tmp; |
|
struct fcoe_ctlr *ctlr; |
|
struct fcoe_port *port; |
|
unsigned int cpu; |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
|
|
fcoe_dev_cleanup(); |
|
|
|
/* releases the associated fcoe hosts */ |
|
rtnl_lock(); |
|
list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { |
|
ctlr = fcoe_to_ctlr(fcoe); |
|
port = lport_priv(ctlr->lp); |
|
fcoe_hostlist_del(port->lport); |
|
queue_work(fcoe_wq, &port->destroy_work); |
|
} |
|
rtnl_unlock(); |
|
|
|
for_each_possible_cpu(cpu) |
|
fcoe_thread_cleanup_local(cpu); |
|
|
|
mutex_unlock(&fcoe_config_mutex); |
|
|
|
/* |
|
* destroy_work's may be chained but destroy_workqueue() |
|
* can take care of them. Just kill the fcoe_wq. |
|
*/ |
|
destroy_workqueue(fcoe_wq); |
|
|
|
/* |
|
* Detaching from the scsi transport must happen after all |
|
* destroys are done on the fcoe_wq. destroy_workqueue will |
|
* enusre the fcoe_wq is flushed. |
|
*/ |
|
fcoe_if_exit(); |
|
|
|
/* detach from fcoe transport */ |
|
fcoe_transport_detach(&fcoe_sw_transport); |
|
} |
|
module_exit(fcoe_exit); |
|
|
|
/** |
|
* fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler |
|
* @seq: active sequence in the FLOGI or FDISC exchange |
|
* @fp: response frame, or error encoded in a pointer (timeout) |
|
* @arg: pointer to the fcoe_ctlr structure |
|
* |
|
* This handles MAC address management for FCoE, then passes control on to |
|
* the libfc FLOGI response handler. |
|
*/ |
|
static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
|
{ |
|
struct fcoe_ctlr *fip = arg; |
|
struct fc_exch *exch = fc_seq_exch(seq); |
|
struct fc_lport *lport = exch->lp; |
|
u8 *mac; |
|
|
|
if (IS_ERR(fp)) |
|
goto done; |
|
|
|
mac = fr_cb(fp)->granted_mac; |
|
/* pre-FIP */ |
|
if (is_zero_ether_addr(mac)) |
|
fcoe_ctlr_recv_flogi(fip, lport, fp); |
|
if (!is_zero_ether_addr(mac)) |
|
fcoe_update_src_mac(lport, mac); |
|
done: |
|
fc_lport_flogi_resp(seq, fp, lport); |
|
} |
|
|
|
/** |
|
* fcoe_logo_resp() - FCoE specific LOGO response handler |
|
* @seq: active sequence in the LOGO exchange |
|
* @fp: response frame, or error encoded in a pointer (timeout) |
|
* @arg: pointer to the fcoe_ctlr structure |
|
* |
|
* This handles MAC address management for FCoE, then passes control on to |
|
* the libfc LOGO response handler. |
|
*/ |
|
static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
|
{ |
|
struct fc_lport *lport = arg; |
|
static u8 zero_mac[ETH_ALEN] = { 0 }; |
|
|
|
if (!IS_ERR(fp)) |
|
fcoe_update_src_mac(lport, zero_mac); |
|
fc_lport_logo_resp(seq, fp, lport); |
|
} |
|
|
|
/* |
|
* fcoe_elsct_send - FCoE specific ELS handler |
|
* |
|
* This does special case handling of FIP encapsualted ELS exchanges for FCoE, |
|
* using FCoE specific response handlers and passing the FIP controller as |
|
* the argument (the lport is still available from the exchange). |
|
* |
|
* Most of the work here is just handed off to the libfc routine. |
|
*/ |
|
static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, |
|
struct fc_frame *fp, unsigned int op, |
|
void (*resp)(struct fc_seq *, |
|
struct fc_frame *, |
|
void *), |
|
void *arg, u32 timeout) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); |
|
struct fc_frame_header *fh = fc_frame_header_get(fp); |
|
|
|
switch (op) { |
|
case ELS_FLOGI: |
|
case ELS_FDISC: |
|
if (lport->point_to_multipoint) |
|
break; |
|
return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, |
|
fip, timeout); |
|
case ELS_LOGO: |
|
/* only hook onto fabric logouts, not port logouts */ |
|
if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) |
|
break; |
|
return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, |
|
lport, timeout); |
|
} |
|
return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); |
|
} |
|
|
|
/** |
|
* fcoe_vport_create() - create an fc_host/scsi_host for a vport |
|
* @vport: fc_vport object to create a new fc_host for |
|
* @disabled: start the new fc_host in a disabled state by default? |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_vport_create(struct fc_vport *vport, bool disabled) |
|
{ |
|
struct Scsi_Host *shost = vport_to_shost(vport); |
|
struct fc_lport *n_port = shost_priv(shost); |
|
struct fcoe_port *port = lport_priv(n_port); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct net_device *netdev = fcoe->netdev; |
|
struct fc_lport *vn_port; |
|
int rc; |
|
char buf[32]; |
|
|
|
rc = fcoe_validate_vport_create(vport); |
|
if (rc) { |
|
fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); |
|
printk(KERN_ERR "fcoe: Failed to create vport, " |
|
"WWPN (0x%s) already exists\n", |
|
buf); |
|
return rc; |
|
} |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
rtnl_lock(); |
|
vn_port = fcoe_if_create(fcoe, &vport->dev, 1); |
|
rtnl_unlock(); |
|
mutex_unlock(&fcoe_config_mutex); |
|
|
|
if (IS_ERR(vn_port)) { |
|
printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", |
|
netdev->name); |
|
return -EIO; |
|
} |
|
|
|
if (disabled) { |
|
fc_vport_set_state(vport, FC_VPORT_DISABLED); |
|
} else { |
|
vn_port->boot_time = jiffies; |
|
fc_fabric_login(vn_port); |
|
fc_vport_setlink(vn_port); |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport |
|
* @vport: fc_vport object that is being destroyed |
|
* |
|
* Returns: 0 for success |
|
*/ |
|
static int fcoe_vport_destroy(struct fc_vport *vport) |
|
{ |
|
struct Scsi_Host *shost = vport_to_shost(vport); |
|
struct fc_lport *n_port = shost_priv(shost); |
|
struct fc_lport *vn_port = vport->dd_data; |
|
|
|
mutex_lock(&n_port->lp_mutex); |
|
list_del(&vn_port->list); |
|
mutex_unlock(&n_port->lp_mutex); |
|
|
|
mutex_lock(&fcoe_config_mutex); |
|
rtnl_lock(); |
|
fcoe_if_destroy(vn_port); |
|
rtnl_unlock(); |
|
mutex_unlock(&fcoe_config_mutex); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_vport_remove() - remove attached vports |
|
* @lport: lport for which the vports should be removed |
|
*/ |
|
static void fcoe_vport_remove(struct fc_lport *lport) |
|
{ |
|
struct Scsi_Host *shost; |
|
struct fc_host_attrs *fc_host; |
|
unsigned long flags; |
|
struct fc_vport *vport; |
|
struct fc_vport *next_vport; |
|
|
|
shost = lport->host; |
|
fc_host = shost_to_fc_host(shost); |
|
|
|
/* Loop through all the vports and mark them for deletion */ |
|
spin_lock_irqsave(shost->host_lock, flags); |
|
list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { |
|
if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { |
|
continue; |
|
} else { |
|
vport->flags |= FC_VPORT_DELETING; |
|
queue_work(fc_host_work_q(shost), |
|
&vport->vport_delete_work); |
|
} |
|
} |
|
spin_unlock_irqrestore(shost->host_lock, flags); |
|
|
|
flush_workqueue(fc_host_work_q(shost)); |
|
} |
|
|
|
/** |
|
* fcoe_vport_disable() - change vport state |
|
* @vport: vport to bring online/offline |
|
* @disable: should the vport be disabled? |
|
*/ |
|
static int fcoe_vport_disable(struct fc_vport *vport, bool disable) |
|
{ |
|
struct fc_lport *lport = vport->dd_data; |
|
|
|
if (disable) { |
|
fc_vport_set_state(vport, FC_VPORT_DISABLED); |
|
fc_fabric_logoff(lport); |
|
} else { |
|
lport->boot_time = jiffies; |
|
fc_fabric_login(lport); |
|
fc_vport_setlink(lport); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_vport_set_symbolic_name() - append vport string to symbolic name |
|
* @vport: fc_vport with a new symbolic name string |
|
* |
|
* After generating a new symbolic name string, a new RSPN_ID request is |
|
* sent to the name server. There is no response handler, so if it fails |
|
* for some reason it will not be retried. |
|
*/ |
|
static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) |
|
{ |
|
struct fc_lport *lport = vport->dd_data; |
|
struct fc_frame *fp; |
|
size_t len; |
|
|
|
snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, |
|
"%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, |
|
fcoe_netdev(lport)->name, vport->symbolic_name); |
|
|
|
if (lport->state != LPORT_ST_READY) |
|
return; |
|
|
|
len = strnlen(fc_host_symbolic_name(lport->host), 255); |
|
fp = fc_frame_alloc(lport, |
|
sizeof(struct fc_ct_hdr) + |
|
sizeof(struct fc_ns_rspn) + len); |
|
if (!fp) |
|
return; |
|
lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, |
|
NULL, NULL, 3 * lport->r_a_tov); |
|
} |
|
|
|
static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) |
|
{ |
|
struct fcoe_ctlr_device *ctlr_dev = |
|
fcoe_fcf_dev_to_ctlr_dev(fcf_dev); |
|
struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); |
|
|
|
fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); |
|
} |
|
|
|
/** |
|
* fcoe_set_port_id() - Callback from libfc when Port_ID is set. |
|
* @lport: the local port |
|
* @port_id: the port ID |
|
* @fp: the received frame, if any, that caused the port_id to be set. |
|
* |
|
* This routine handles the case where we received a FLOGI and are |
|
* entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() |
|
* so it can set the non-mapped mode and gateway address. |
|
* |
|
* The FLOGI LS_ACC is handled by fcoe_flogi_resp(). |
|
*/ |
|
static void fcoe_set_port_id(struct fc_lport *lport, |
|
u32 port_id, struct fc_frame *fp) |
|
{ |
|
struct fcoe_port *port = lport_priv(lport); |
|
struct fcoe_interface *fcoe = port->priv; |
|
struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); |
|
|
|
if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) |
|
fcoe_ctlr_recv_flogi(ctlr, lport, fp); |
|
}
|
|
|