![Mark Rustad](/assets/img/avatar_default.png)
Recent changes to add fcoe_sysfs caused libfcoe_init to call fcoe_transport_exit in a module initialization routine. The change resulted in the below error. This patch removes the __exit keyword from the fcoe_transport_exit definition such that it may be called from an __init routine. WARNING: drivers/scsi/fcoe/libfcoe.o(.init.text+0x21): Section mismatch in reference from the function init_module() to the function .exit.text:fcoe_transp exit() The function __init init_module() references a function __exit fcoe_transport_exit(). This is often seen when error handling in the init function uses functionality in the exit path. The fix is often to remove the __exit annotation of fcoe_transport_exit() so it may be used outside an exit section. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
841 lines
21 KiB
C
841 lines
21 KiB
C
/*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/errno.h>
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#include <linux/crc32.h>
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#include <scsi/libfcoe.h>
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#include "libfcoe.h"
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MODULE_AUTHOR("Open-FCoE.org");
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MODULE_DESCRIPTION("FIP discovery protocol and FCoE transport for FCoE HBAs");
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MODULE_LICENSE("GPL v2");
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static int fcoe_transport_create(const char *, struct kernel_param *);
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static int fcoe_transport_destroy(const char *, struct kernel_param *);
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static int fcoe_transport_show(char *buffer, const struct kernel_param *kp);
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static struct fcoe_transport *fcoe_transport_lookup(struct net_device *device);
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static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *device);
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static int fcoe_transport_enable(const char *, struct kernel_param *);
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static int fcoe_transport_disable(const char *, struct kernel_param *);
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static int libfcoe_device_notification(struct notifier_block *notifier,
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ulong event, void *ptr);
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static LIST_HEAD(fcoe_transports);
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static DEFINE_MUTEX(ft_mutex);
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static LIST_HEAD(fcoe_netdevs);
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static DEFINE_MUTEX(fn_mutex);
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unsigned int libfcoe_debug_logging;
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module_param_named(debug_logging, libfcoe_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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module_param_call(show, NULL, fcoe_transport_show, NULL, S_IRUSR);
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__MODULE_PARM_TYPE(show, "string");
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MODULE_PARM_DESC(show, " Show attached FCoE transports");
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module_param_call(create, fcoe_transport_create, NULL,
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(void *)FIP_MODE_FABRIC, S_IWUSR);
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__MODULE_PARM_TYPE(create, "string");
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MODULE_PARM_DESC(create, " Creates fcoe instance on a ethernet interface");
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module_param_call(create_vn2vn, fcoe_transport_create, NULL,
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(void *)FIP_MODE_VN2VN, S_IWUSR);
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__MODULE_PARM_TYPE(create_vn2vn, "string");
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MODULE_PARM_DESC(create_vn2vn, " Creates a VN_node to VN_node FCoE instance "
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"on an Ethernet interface");
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module_param_call(destroy, fcoe_transport_destroy, NULL, NULL, S_IWUSR);
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__MODULE_PARM_TYPE(destroy, "string");
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MODULE_PARM_DESC(destroy, " Destroys fcoe instance on a ethernet interface");
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module_param_call(enable, fcoe_transport_enable, NULL, NULL, S_IWUSR);
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__MODULE_PARM_TYPE(enable, "string");
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MODULE_PARM_DESC(enable, " Enables fcoe on a ethernet interface.");
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module_param_call(disable, fcoe_transport_disable, NULL, NULL, S_IWUSR);
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__MODULE_PARM_TYPE(disable, "string");
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MODULE_PARM_DESC(disable, " Disables fcoe on a ethernet interface.");
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/* notification function for packets from net device */
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static struct notifier_block libfcoe_notifier = {
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.notifier_call = libfcoe_device_notification,
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};
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void __fcoe_get_lesb(struct fc_lport *lport,
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struct fc_els_lesb *fc_lesb,
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struct net_device *netdev)
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{
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unsigned int cpu;
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u32 lfc, vlfc, mdac;
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struct fc_stats *stats;
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struct fcoe_fc_els_lesb *lesb;
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struct rtnl_link_stats64 temp;
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lfc = 0;
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vlfc = 0;
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mdac = 0;
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lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
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memset(lesb, 0, sizeof(*lesb));
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for_each_possible_cpu(cpu) {
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stats = per_cpu_ptr(lport->stats, cpu);
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lfc += stats->LinkFailureCount;
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vlfc += stats->VLinkFailureCount;
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mdac += stats->MissDiscAdvCount;
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}
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lesb->lesb_link_fail = htonl(lfc);
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lesb->lesb_vlink_fail = htonl(vlfc);
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lesb->lesb_miss_fka = htonl(mdac);
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lesb->lesb_fcs_error =
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htonl(dev_get_stats(netdev, &temp)->rx_crc_errors);
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}
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EXPORT_SYMBOL_GPL(__fcoe_get_lesb);
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void fcoe_wwn_to_str(u64 wwn, char *buf, int len)
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{
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u8 wwpn[8];
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u64_to_wwn(wwn, wwpn);
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snprintf(buf, len, "%02x%02x%02x%02x%02x%02x%02x%02x",
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wwpn[0], wwpn[1], wwpn[2], wwpn[3],
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wwpn[4], wwpn[5], wwpn[6], wwpn[7]);
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}
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EXPORT_SYMBOL_GPL(fcoe_wwn_to_str);
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/**
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* fcoe_validate_vport_create() - Validate a vport before creating it
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* @vport: NPIV port to be created
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*
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* This routine is meant to add validation for a vport before creating it
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* via fcoe_vport_create().
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* Current validations are:
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* - WWPN supplied is unique for given lport
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*/
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int fcoe_validate_vport_create(struct fc_vport *vport)
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{
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struct Scsi_Host *shost = vport_to_shost(vport);
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struct fc_lport *n_port = shost_priv(shost);
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struct fc_lport *vn_port;
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int rc = 0;
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char buf[32];
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mutex_lock(&n_port->lp_mutex);
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fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
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/* Check if the wwpn is not same as that of the lport */
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if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
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LIBFCOE_TRANSPORT_DBG("vport WWPN 0x%s is same as that of the "
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"base port WWPN\n", buf);
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rc = -EINVAL;
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goto out;
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}
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/* Check if there is any existing vport with same wwpn */
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list_for_each_entry(vn_port, &n_port->vports, list) {
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if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
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LIBFCOE_TRANSPORT_DBG("vport with given WWPN 0x%s "
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"already exists\n", buf);
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rc = -EINVAL;
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break;
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}
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}
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out:
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mutex_unlock(&n_port->lp_mutex);
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return rc;
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}
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EXPORT_SYMBOL_GPL(fcoe_validate_vport_create);
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/**
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* fcoe_get_wwn() - Get the world wide name from LLD if it supports it
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* @netdev: the associated net device
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* @wwn: the output WWN
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* @type: the type of WWN (WWPN or WWNN)
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*
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* Returns: 0 for success
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*/
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int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
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{
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const struct net_device_ops *ops = netdev->netdev_ops;
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if (ops->ndo_fcoe_get_wwn)
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return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(fcoe_get_wwn);
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/**
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* fcoe_fc_crc() - Calculates the CRC for a given frame
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* @fp: The frame to be checksumed
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*
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* This uses crc32() routine to calculate the CRC for a frame
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*
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* Return: The 32 bit CRC value
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*/
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u32 fcoe_fc_crc(struct fc_frame *fp)
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{
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struct sk_buff *skb = fp_skb(fp);
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struct skb_frag_struct *frag;
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unsigned char *data;
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unsigned long off, len, clen;
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u32 crc;
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unsigned i;
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crc = crc32(~0, skb->data, skb_headlen(skb));
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
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frag = &skb_shinfo(skb)->frags[i];
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off = frag->page_offset;
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len = skb_frag_size(frag);
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while (len > 0) {
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clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
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data = kmap_atomic(
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skb_frag_page(frag) + (off >> PAGE_SHIFT));
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crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
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kunmap_atomic(data);
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off += clen;
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len -= clen;
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}
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}
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return crc;
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}
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EXPORT_SYMBOL_GPL(fcoe_fc_crc);
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/**
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* fcoe_start_io() - Start FCoE I/O
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* @skb: The packet to be transmitted
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*
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* This routine is called from the net device to start transmitting
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* FCoE packets.
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*
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* Returns: 0 for success
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*/
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int fcoe_start_io(struct sk_buff *skb)
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{
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struct sk_buff *nskb;
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int rc;
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nskb = skb_clone(skb, GFP_ATOMIC);
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if (!nskb)
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return -ENOMEM;
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rc = dev_queue_xmit(nskb);
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if (rc != 0)
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return rc;
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kfree_skb(skb);
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return 0;
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}
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EXPORT_SYMBOL_GPL(fcoe_start_io);
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/**
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* fcoe_clean_pending_queue() - Dequeue a skb and free it
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* @lport: The local port to dequeue a skb on
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*/
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void fcoe_clean_pending_queue(struct fc_lport *lport)
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{
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struct fcoe_port *port = lport_priv(lport);
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struct sk_buff *skb;
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spin_lock_bh(&port->fcoe_pending_queue.lock);
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while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
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spin_unlock_bh(&port->fcoe_pending_queue.lock);
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kfree_skb(skb);
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spin_lock_bh(&port->fcoe_pending_queue.lock);
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}
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spin_unlock_bh(&port->fcoe_pending_queue.lock);
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}
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EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
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/**
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* fcoe_check_wait_queue() - Attempt to clear the transmit backlog
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* @lport: The local port whose backlog is to be cleared
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*
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* This empties the wait_queue, dequeues the head of the wait_queue queue
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* and calls fcoe_start_io() for each packet. If all skb have been
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* transmitted it returns the qlen. If an error occurs it restores
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* wait_queue (to try again later) and returns -1.
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*
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* The wait_queue is used when the skb transmit fails. The failed skb
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* will go in the wait_queue which will be emptied by the timer function or
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* by the next skb transmit.
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*/
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void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
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{
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struct fcoe_port *port = lport_priv(lport);
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int rc;
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spin_lock_bh(&port->fcoe_pending_queue.lock);
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if (skb)
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__skb_queue_tail(&port->fcoe_pending_queue, skb);
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if (port->fcoe_pending_queue_active)
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goto out;
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port->fcoe_pending_queue_active = 1;
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while (port->fcoe_pending_queue.qlen) {
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/* keep qlen > 0 until fcoe_start_io succeeds */
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port->fcoe_pending_queue.qlen++;
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skb = __skb_dequeue(&port->fcoe_pending_queue);
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spin_unlock_bh(&port->fcoe_pending_queue.lock);
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rc = fcoe_start_io(skb);
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spin_lock_bh(&port->fcoe_pending_queue.lock);
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if (rc) {
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__skb_queue_head(&port->fcoe_pending_queue, skb);
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/* undo temporary increment above */
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port->fcoe_pending_queue.qlen--;
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break;
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}
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/* undo temporary increment above */
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port->fcoe_pending_queue.qlen--;
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}
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if (port->fcoe_pending_queue.qlen < port->min_queue_depth)
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lport->qfull = 0;
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if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
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mod_timer(&port->timer, jiffies + 2);
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port->fcoe_pending_queue_active = 0;
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out:
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if (port->fcoe_pending_queue.qlen > port->max_queue_depth)
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lport->qfull = 1;
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spin_unlock_bh(&port->fcoe_pending_queue.lock);
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}
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EXPORT_SYMBOL_GPL(fcoe_check_wait_queue);
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/**
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* fcoe_queue_timer() - The fcoe queue timer
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* @lport: The local port
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*
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* Calls fcoe_check_wait_queue on timeout
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*/
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void fcoe_queue_timer(ulong lport)
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{
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fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
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}
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EXPORT_SYMBOL_GPL(fcoe_queue_timer);
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/**
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* fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
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* @skb: The packet to be transmitted
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* @tlen: The total length of the trailer
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* @fps: The fcoe context
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*
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* This routine allocates a page for frame trailers. The page is re-used if
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* there is enough room left on it for the current trailer. If there isn't
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* enough buffer left a new page is allocated for the trailer. Reference to
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* the page from this function as well as the skbs using the page fragments
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* ensure that the page is freed at the appropriate time.
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*
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* Returns: 0 for success
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*/
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int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen,
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struct fcoe_percpu_s *fps)
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{
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struct page *page;
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page = fps->crc_eof_page;
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if (!page) {
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page = alloc_page(GFP_ATOMIC);
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if (!page)
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return -ENOMEM;
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fps->crc_eof_page = page;
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fps->crc_eof_offset = 0;
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}
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get_page(page);
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skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
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fps->crc_eof_offset, tlen);
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skb->len += tlen;
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skb->data_len += tlen;
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skb->truesize += tlen;
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fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
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if (fps->crc_eof_offset >= PAGE_SIZE) {
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fps->crc_eof_page = NULL;
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fps->crc_eof_offset = 0;
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put_page(page);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(fcoe_get_paged_crc_eof);
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/**
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* fcoe_transport_lookup - find an fcoe transport that matches a netdev
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* @netdev: The netdev to look for from all attached transports
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*
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* Returns : ptr to the fcoe transport that supports this netdev or NULL
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* if not found.
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*
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* The ft_mutex should be held when this is called
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*/
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static struct fcoe_transport *fcoe_transport_lookup(struct net_device *netdev)
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{
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struct fcoe_transport *ft = NULL;
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list_for_each_entry(ft, &fcoe_transports, list)
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if (ft->match && ft->match(netdev))
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return ft;
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return NULL;
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}
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/**
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* fcoe_transport_attach - Attaches an FCoE transport
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* @ft: The fcoe transport to be attached
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*
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* Returns : 0 for success
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*/
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int fcoe_transport_attach(struct fcoe_transport *ft)
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{
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int rc = 0;
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mutex_lock(&ft_mutex);
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if (ft->attached) {
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LIBFCOE_TRANSPORT_DBG("transport %s already attached\n",
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ft->name);
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rc = -EEXIST;
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goto out_attach;
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}
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/* Add default transport to the tail */
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if (strcmp(ft->name, FCOE_TRANSPORT_DEFAULT))
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list_add(&ft->list, &fcoe_transports);
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else
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list_add_tail(&ft->list, &fcoe_transports);
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ft->attached = true;
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LIBFCOE_TRANSPORT_DBG("attaching transport %s\n", ft->name);
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out_attach:
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mutex_unlock(&ft_mutex);
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return rc;
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}
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EXPORT_SYMBOL(fcoe_transport_attach);
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/**
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* fcoe_transport_detach - Detaches an FCoE transport
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* @ft: The fcoe transport to be attached
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*
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* Returns : 0 for success
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*/
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int fcoe_transport_detach(struct fcoe_transport *ft)
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{
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int rc = 0;
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struct fcoe_netdev_mapping *nm = NULL, *tmp;
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mutex_lock(&ft_mutex);
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if (!ft->attached) {
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LIBFCOE_TRANSPORT_DBG("transport %s already detached\n",
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ft->name);
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rc = -ENODEV;
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goto out_attach;
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}
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/* remove netdev mapping for this transport as it is going away */
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mutex_lock(&fn_mutex);
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list_for_each_entry_safe(nm, tmp, &fcoe_netdevs, list) {
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if (nm->ft == ft) {
|
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LIBFCOE_TRANSPORT_DBG("transport %s going away, "
|
|
"remove its netdev mapping for %s\n",
|
|
ft->name, nm->netdev->name);
|
|
list_del(&nm->list);
|
|
kfree(nm);
|
|
}
|
|
}
|
|
mutex_unlock(&fn_mutex);
|
|
|
|
list_del(&ft->list);
|
|
ft->attached = false;
|
|
LIBFCOE_TRANSPORT_DBG("detaching transport %s\n", ft->name);
|
|
|
|
out_attach:
|
|
mutex_unlock(&ft_mutex);
|
|
return rc;
|
|
|
|
}
|
|
EXPORT_SYMBOL(fcoe_transport_detach);
|
|
|
|
static int fcoe_transport_show(char *buffer, const struct kernel_param *kp)
|
|
{
|
|
int i, j;
|
|
struct fcoe_transport *ft = NULL;
|
|
|
|
i = j = sprintf(buffer, "Attached FCoE transports:");
|
|
mutex_lock(&ft_mutex);
|
|
list_for_each_entry(ft, &fcoe_transports, list) {
|
|
if (i >= PAGE_SIZE - IFNAMSIZ)
|
|
break;
|
|
i += snprintf(&buffer[i], IFNAMSIZ, "%s ", ft->name);
|
|
}
|
|
mutex_unlock(&ft_mutex);
|
|
if (i == j)
|
|
i += snprintf(&buffer[i], IFNAMSIZ, "none");
|
|
return i;
|
|
}
|
|
|
|
static int __init fcoe_transport_init(void)
|
|
{
|
|
register_netdevice_notifier(&libfcoe_notifier);
|
|
return 0;
|
|
}
|
|
|
|
static int fcoe_transport_exit(void)
|
|
{
|
|
struct fcoe_transport *ft;
|
|
|
|
unregister_netdevice_notifier(&libfcoe_notifier);
|
|
mutex_lock(&ft_mutex);
|
|
list_for_each_entry(ft, &fcoe_transports, list)
|
|
printk(KERN_ERR "FCoE transport %s is still attached!\n",
|
|
ft->name);
|
|
mutex_unlock(&ft_mutex);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int fcoe_add_netdev_mapping(struct net_device *netdev,
|
|
struct fcoe_transport *ft)
|
|
{
|
|
struct fcoe_netdev_mapping *nm;
|
|
|
|
nm = kmalloc(sizeof(*nm), GFP_KERNEL);
|
|
if (!nm) {
|
|
printk(KERN_ERR "Unable to allocate netdev_mapping");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nm->netdev = netdev;
|
|
nm->ft = ft;
|
|
|
|
mutex_lock(&fn_mutex);
|
|
list_add(&nm->list, &fcoe_netdevs);
|
|
mutex_unlock(&fn_mutex);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void fcoe_del_netdev_mapping(struct net_device *netdev)
|
|
{
|
|
struct fcoe_netdev_mapping *nm = NULL, *tmp;
|
|
|
|
mutex_lock(&fn_mutex);
|
|
list_for_each_entry_safe(nm, tmp, &fcoe_netdevs, list) {
|
|
if (nm->netdev == netdev) {
|
|
list_del(&nm->list);
|
|
kfree(nm);
|
|
mutex_unlock(&fn_mutex);
|
|
return;
|
|
}
|
|
}
|
|
mutex_unlock(&fn_mutex);
|
|
}
|
|
|
|
|
|
/**
|
|
* fcoe_netdev_map_lookup - find the fcoe transport that matches the netdev on which
|
|
* it was created
|
|
*
|
|
* Returns : ptr to the fcoe transport that supports this netdev or NULL
|
|
* if not found.
|
|
*
|
|
* The ft_mutex should be held when this is called
|
|
*/
|
|
static struct fcoe_transport *fcoe_netdev_map_lookup(struct net_device *netdev)
|
|
{
|
|
struct fcoe_transport *ft = NULL;
|
|
struct fcoe_netdev_mapping *nm;
|
|
|
|
mutex_lock(&fn_mutex);
|
|
list_for_each_entry(nm, &fcoe_netdevs, list) {
|
|
if (netdev == nm->netdev) {
|
|
ft = nm->ft;
|
|
mutex_unlock(&fn_mutex);
|
|
return ft;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&fn_mutex);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* fcoe_if_to_netdev() - Parse a name buffer to get a net device
|
|
* @buffer: The name of the net device
|
|
*
|
|
* Returns: NULL or a ptr to net_device
|
|
*/
|
|
static struct net_device *fcoe_if_to_netdev(const char *buffer)
|
|
{
|
|
char *cp;
|
|
char ifname[IFNAMSIZ + 2];
|
|
|
|
if (buffer) {
|
|
strlcpy(ifname, buffer, IFNAMSIZ);
|
|
cp = ifname + strlen(ifname);
|
|
while (--cp >= ifname && *cp == '\n')
|
|
*cp = '\0';
|
|
return dev_get_by_name(&init_net, ifname);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* libfcoe_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 libfcoe_device_notification(struct notifier_block *notifier,
|
|
ulong event, void *ptr)
|
|
{
|
|
struct net_device *netdev = ptr;
|
|
|
|
switch (event) {
|
|
case NETDEV_UNREGISTER:
|
|
LIBFCOE_TRANSPORT_DBG("NETDEV_UNREGISTER %s\n",
|
|
netdev->name);
|
|
fcoe_del_netdev_mapping(netdev);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
|
|
/**
|
|
* fcoe_transport_create() - Create a fcoe interface
|
|
* @buffer: The name of the Ethernet interface to create on
|
|
* @kp: The associated kernel param
|
|
*
|
|
* Called from sysfs. This holds the ft_mutex while calling the
|
|
* registered fcoe transport's create function.
|
|
*
|
|
* Returns: 0 for success
|
|
*/
|
|
static int fcoe_transport_create(const char *buffer, struct kernel_param *kp)
|
|
{
|
|
int rc = -ENODEV;
|
|
struct net_device *netdev = NULL;
|
|
struct fcoe_transport *ft = NULL;
|
|
enum fip_state fip_mode = (enum fip_state)(long)kp->arg;
|
|
|
|
mutex_lock(&ft_mutex);
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
if (!netdev) {
|
|
LIBFCOE_TRANSPORT_DBG("Invalid device %s.\n", buffer);
|
|
goto out_nodev;
|
|
}
|
|
|
|
ft = fcoe_netdev_map_lookup(netdev);
|
|
if (ft) {
|
|
LIBFCOE_TRANSPORT_DBG("transport %s already has existing "
|
|
"FCoE instance on %s.\n",
|
|
ft->name, netdev->name);
|
|
rc = -EEXIST;
|
|
goto out_putdev;
|
|
}
|
|
|
|
ft = fcoe_transport_lookup(netdev);
|
|
if (!ft) {
|
|
LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
|
|
netdev->name);
|
|
goto out_putdev;
|
|
}
|
|
|
|
rc = fcoe_add_netdev_mapping(netdev, ft);
|
|
if (rc) {
|
|
LIBFCOE_TRANSPORT_DBG("failed to add new netdev mapping "
|
|
"for FCoE transport %s for %s.\n",
|
|
ft->name, netdev->name);
|
|
goto out_putdev;
|
|
}
|
|
|
|
/* pass to transport create */
|
|
rc = ft->create ? ft->create(netdev, fip_mode) : -ENODEV;
|
|
if (rc)
|
|
fcoe_del_netdev_mapping(netdev);
|
|
|
|
LIBFCOE_TRANSPORT_DBG("transport %s %s to create fcoe on %s.\n",
|
|
ft->name, (rc) ? "failed" : "succeeded",
|
|
netdev->name);
|
|
|
|
out_putdev:
|
|
dev_put(netdev);
|
|
out_nodev:
|
|
mutex_unlock(&ft_mutex);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* fcoe_transport_destroy() - Destroy a FCoE interface
|
|
* @buffer: The name of the Ethernet interface to be destroyed
|
|
* @kp: The associated kernel parameter
|
|
*
|
|
* Called from sysfs. This holds the ft_mutex while calling the
|
|
* registered fcoe transport's destroy function.
|
|
*
|
|
* Returns: 0 for success
|
|
*/
|
|
static int fcoe_transport_destroy(const char *buffer, struct kernel_param *kp)
|
|
{
|
|
int rc = -ENODEV;
|
|
struct net_device *netdev = NULL;
|
|
struct fcoe_transport *ft = NULL;
|
|
|
|
mutex_lock(&ft_mutex);
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
if (!netdev) {
|
|
LIBFCOE_TRANSPORT_DBG("invalid device %s.\n", buffer);
|
|
goto out_nodev;
|
|
}
|
|
|
|
ft = fcoe_netdev_map_lookup(netdev);
|
|
if (!ft) {
|
|
LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
|
|
netdev->name);
|
|
goto out_putdev;
|
|
}
|
|
|
|
/* pass to transport destroy */
|
|
rc = ft->destroy ? ft->destroy(netdev) : -ENODEV;
|
|
fcoe_del_netdev_mapping(netdev);
|
|
LIBFCOE_TRANSPORT_DBG("transport %s %s to destroy fcoe on %s.\n",
|
|
ft->name, (rc) ? "failed" : "succeeded",
|
|
netdev->name);
|
|
|
|
out_putdev:
|
|
dev_put(netdev);
|
|
out_nodev:
|
|
mutex_unlock(&ft_mutex);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* fcoe_transport_disable() - Disables a FCoE interface
|
|
* @buffer: The name of the Ethernet interface to be disabled
|
|
* @kp: The associated kernel parameter
|
|
*
|
|
* Called from sysfs.
|
|
*
|
|
* Returns: 0 for success
|
|
*/
|
|
static int fcoe_transport_disable(const char *buffer, struct kernel_param *kp)
|
|
{
|
|
int rc = -ENODEV;
|
|
struct net_device *netdev = NULL;
|
|
struct fcoe_transport *ft = NULL;
|
|
|
|
mutex_lock(&ft_mutex);
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
if (!netdev)
|
|
goto out_nodev;
|
|
|
|
ft = fcoe_netdev_map_lookup(netdev);
|
|
if (!ft)
|
|
goto out_putdev;
|
|
|
|
rc = ft->disable ? ft->disable(netdev) : -ENODEV;
|
|
|
|
out_putdev:
|
|
dev_put(netdev);
|
|
out_nodev:
|
|
mutex_unlock(&ft_mutex);
|
|
|
|
if (rc == -ERESTARTSYS)
|
|
return restart_syscall();
|
|
else
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* fcoe_transport_enable() - Enables a FCoE interface
|
|
* @buffer: The name of the Ethernet interface to be enabled
|
|
* @kp: The associated kernel parameter
|
|
*
|
|
* Called from sysfs.
|
|
*
|
|
* Returns: 0 for success
|
|
*/
|
|
static int fcoe_transport_enable(const char *buffer, struct kernel_param *kp)
|
|
{
|
|
int rc = -ENODEV;
|
|
struct net_device *netdev = NULL;
|
|
struct fcoe_transport *ft = NULL;
|
|
|
|
mutex_lock(&ft_mutex);
|
|
|
|
netdev = fcoe_if_to_netdev(buffer);
|
|
if (!netdev)
|
|
goto out_nodev;
|
|
|
|
ft = fcoe_netdev_map_lookup(netdev);
|
|
if (!ft)
|
|
goto out_putdev;
|
|
|
|
rc = ft->enable ? ft->enable(netdev) : -ENODEV;
|
|
|
|
out_putdev:
|
|
dev_put(netdev);
|
|
out_nodev:
|
|
mutex_unlock(&ft_mutex);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* libfcoe_init() - Initialization routine for libfcoe.ko
|
|
*/
|
|
static int __init libfcoe_init(void)
|
|
{
|
|
int rc = 0;
|
|
|
|
rc = fcoe_transport_init();
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = fcoe_sysfs_setup();
|
|
if (rc)
|
|
fcoe_transport_exit();
|
|
|
|
return rc;
|
|
}
|
|
module_init(libfcoe_init);
|
|
|
|
/**
|
|
* libfcoe_exit() - Tear down libfcoe.ko
|
|
*/
|
|
static void __exit libfcoe_exit(void)
|
|
{
|
|
fcoe_sysfs_teardown();
|
|
fcoe_transport_exit();
|
|
}
|
|
module_exit(libfcoe_exit);
|