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1065 lines
28 KiB
1065 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright(c) 2011 - 2012 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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|
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/etherdevice.h> |
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#include <linux/ctype.h> |
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|
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#include <scsi/fcoe_sysfs.h> |
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#include <scsi/libfcoe.h> |
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|
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/* |
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* OK to include local libfcoe.h for debug_logging, but cannot include |
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* <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have |
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* have to include more than fcoe_sysfs.h. |
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*/ |
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#include "libfcoe.h" |
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|
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static atomic_t ctlr_num; |
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static atomic_t fcf_num; |
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|
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/* |
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* fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs |
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* should insulate the loss of a fcf. |
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*/ |
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static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */ |
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|
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module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo, |
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uint, S_IRUGO|S_IWUSR); |
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MODULE_PARM_DESC(fcf_dev_loss_tmo, |
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"Maximum number of seconds that libfcoe should" |
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" insulate the loss of a fcf. Once this value is" |
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" exceeded, the fcf is removed."); |
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|
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/* |
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* These are used by the fcoe_*_show_function routines, they |
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* are intentionally placed in the .c file as they're not intended |
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* for use throughout the code. |
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*/ |
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#define fcoe_ctlr_id(x) \ |
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((x)->id) |
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#define fcoe_ctlr_work_q_name(x) \ |
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((x)->work_q_name) |
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#define fcoe_ctlr_work_q(x) \ |
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((x)->work_q) |
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#define fcoe_ctlr_devloss_work_q_name(x) \ |
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((x)->devloss_work_q_name) |
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#define fcoe_ctlr_devloss_work_q(x) \ |
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((x)->devloss_work_q) |
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#define fcoe_ctlr_mode(x) \ |
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((x)->mode) |
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#define fcoe_ctlr_fcf_dev_loss_tmo(x) \ |
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((x)->fcf_dev_loss_tmo) |
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#define fcoe_ctlr_link_fail(x) \ |
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((x)->lesb.lesb_link_fail) |
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#define fcoe_ctlr_vlink_fail(x) \ |
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((x)->lesb.lesb_vlink_fail) |
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#define fcoe_ctlr_miss_fka(x) \ |
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((x)->lesb.lesb_miss_fka) |
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#define fcoe_ctlr_symb_err(x) \ |
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((x)->lesb.lesb_symb_err) |
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#define fcoe_ctlr_err_block(x) \ |
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((x)->lesb.lesb_err_block) |
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#define fcoe_ctlr_fcs_error(x) \ |
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((x)->lesb.lesb_fcs_error) |
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#define fcoe_ctlr_enabled(x) \ |
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((x)->enabled) |
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#define fcoe_fcf_state(x) \ |
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((x)->state) |
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#define fcoe_fcf_fabric_name(x) \ |
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((x)->fabric_name) |
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#define fcoe_fcf_switch_name(x) \ |
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((x)->switch_name) |
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#define fcoe_fcf_fc_map(x) \ |
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((x)->fc_map) |
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#define fcoe_fcf_vfid(x) \ |
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((x)->vfid) |
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#define fcoe_fcf_mac(x) \ |
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((x)->mac) |
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#define fcoe_fcf_priority(x) \ |
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((x)->priority) |
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#define fcoe_fcf_fka_period(x) \ |
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((x)->fka_period) |
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#define fcoe_fcf_dev_loss_tmo(x) \ |
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((x)->dev_loss_tmo) |
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#define fcoe_fcf_selected(x) \ |
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((x)->selected) |
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#define fcoe_fcf_vlan_id(x) \ |
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((x)->vlan_id) |
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|
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/* |
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* dev_loss_tmo attribute |
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*/ |
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static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val) |
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{ |
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int ret; |
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|
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ret = kstrtoul(buf, 0, val); |
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if (ret) |
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return -EINVAL; |
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/* |
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* Check for overflow; dev_loss_tmo is u32 |
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*/ |
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if (*val > UINT_MAX) |
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return -EINVAL; |
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|
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return 0; |
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} |
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static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf, |
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unsigned long val) |
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{ |
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if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) || |
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(fcf->state == FCOE_FCF_STATE_DISCONNECTED) || |
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(fcf->state == FCOE_FCF_STATE_DELETED)) |
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return -EBUSY; |
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/* |
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* Check for overflow; dev_loss_tmo is u32 |
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*/ |
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if (val > UINT_MAX) |
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return -EINVAL; |
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fcoe_fcf_dev_loss_tmo(fcf) = val; |
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return 0; |
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} |
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#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \ |
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struct device_attribute device_attr_fcoe_##_prefix##_##_name = \ |
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__ATTR(_name, _mode, _show, _store) |
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|
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#define fcoe_ctlr_show_function(field, format_string, sz, cast) \ |
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static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
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struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
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if (ctlr->f->get_fcoe_ctlr_##field) \ |
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ctlr->f->get_fcoe_ctlr_##field(ctlr); \ |
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return snprintf(buf, sz, format_string, \ |
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cast fcoe_ctlr_##field(ctlr)); \ |
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} |
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#define fcoe_fcf_show_function(field, format_string, sz, cast) \ |
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static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
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struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
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struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \ |
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if (ctlr->f->get_fcoe_fcf_##field) \ |
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ctlr->f->get_fcoe_fcf_##field(fcf); \ |
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return snprintf(buf, sz, format_string, \ |
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cast fcoe_fcf_##field(fcf)); \ |
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} |
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#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \ |
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static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
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struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
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return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \ |
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} |
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#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \ |
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static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
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struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
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return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \ |
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} |
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#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \ |
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fcoe_ctlr_private_show_function(field, format_string, sz, ) \ |
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
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show_fcoe_ctlr_device_##field, NULL) |
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|
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#define fcoe_ctlr_rd_attr(field, format_string, sz) \ |
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fcoe_ctlr_show_function(field, format_string, sz, ) \ |
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
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show_fcoe_ctlr_device_##field, NULL) |
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#define fcoe_fcf_rd_attr(field, format_string, sz) \ |
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fcoe_fcf_show_function(field, format_string, sz, ) \ |
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
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show_fcoe_fcf_device_##field, NULL) |
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#define fcoe_fcf_private_rd_attr(field, format_string, sz) \ |
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fcoe_fcf_private_show_function(field, format_string, sz, ) \ |
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
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show_fcoe_fcf_device_##field, NULL) |
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#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \ |
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fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \ |
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
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show_fcoe_ctlr_device_##field, NULL) |
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#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \ |
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fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \ |
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
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show_fcoe_fcf_device_##field, NULL) |
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#define fcoe_enum_name_search(title, table_type, table) \ |
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static const char *get_fcoe_##title##_name(enum table_type table_key) \ |
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{ \ |
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if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \ |
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return NULL; \ |
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return table[table_key]; \ |
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} |
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static char *fip_conn_type_names[] = { |
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[ FIP_CONN_TYPE_UNKNOWN ] = "Unknown", |
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[ FIP_CONN_TYPE_FABRIC ] = "Fabric", |
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[ FIP_CONN_TYPE_VN2VN ] = "VN2VN", |
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}; |
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fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names) |
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static enum fip_conn_type fcoe_parse_mode(const char *buf) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) { |
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if (strcasecmp(buf, fip_conn_type_names[i]) == 0) |
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return i; |
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} |
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return FIP_CONN_TYPE_UNKNOWN; |
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} |
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static char *fcf_state_names[] = { |
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[ FCOE_FCF_STATE_UNKNOWN ] = "Unknown", |
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[ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected", |
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[ FCOE_FCF_STATE_CONNECTED ] = "Connected", |
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}; |
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fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names) |
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#define FCOE_FCF_STATE_MAX_NAMELEN 50 |
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static ssize_t show_fcf_state(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
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const char *name; |
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name = get_fcoe_fcf_state_name(fcf->state); |
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if (!name) |
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return -EINVAL; |
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return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name); |
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} |
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static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL); |
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#define FCOE_MAX_MODENAME_LEN 20 |
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static ssize_t show_ctlr_mode(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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const char *name; |
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name = get_fcoe_ctlr_mode_name(ctlr->mode); |
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if (!name) |
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return -EINVAL; |
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return snprintf(buf, FCOE_MAX_MODENAME_LEN, |
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"%s\n", name); |
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} |
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static ssize_t store_ctlr_mode(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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char mode[FCOE_MAX_MODENAME_LEN + 1]; |
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if (count > FCOE_MAX_MODENAME_LEN) |
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return -EINVAL; |
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strncpy(mode, buf, count); |
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if (mode[count - 1] == '\n') |
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mode[count - 1] = '\0'; |
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else |
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mode[count] = '\0'; |
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switch (ctlr->enabled) { |
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case FCOE_CTLR_ENABLED: |
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LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n"); |
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return -EBUSY; |
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case FCOE_CTLR_DISABLED: |
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if (!ctlr->f->set_fcoe_ctlr_mode) { |
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LIBFCOE_SYSFS_DBG(ctlr, |
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"Mode change not supported by LLD.\n"); |
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return -ENOTSUPP; |
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} |
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ctlr->mode = fcoe_parse_mode(mode); |
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if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) { |
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LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n", |
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buf); |
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return -EINVAL; |
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} |
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ctlr->f->set_fcoe_ctlr_mode(ctlr); |
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LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf); |
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return count; |
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case FCOE_CTLR_UNUSED: |
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default: |
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LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n"); |
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return -ENOTSUPP; |
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} |
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} |
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static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR, |
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show_ctlr_mode, store_ctlr_mode); |
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static ssize_t store_ctlr_enabled(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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bool enabled; |
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int rc; |
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if (*buf == '1') |
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enabled = true; |
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else if (*buf == '0') |
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enabled = false; |
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else |
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return -EINVAL; |
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|
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switch (ctlr->enabled) { |
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case FCOE_CTLR_ENABLED: |
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if (enabled) |
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return count; |
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ctlr->enabled = FCOE_CTLR_DISABLED; |
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break; |
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case FCOE_CTLR_DISABLED: |
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if (!enabled) |
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return count; |
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ctlr->enabled = FCOE_CTLR_ENABLED; |
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break; |
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case FCOE_CTLR_UNUSED: |
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return -ENOTSUPP; |
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} |
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rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr); |
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if (rc) |
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return rc; |
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return count; |
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} |
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static char *ctlr_enabled_state_names[] = { |
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[ FCOE_CTLR_ENABLED ] = "1", |
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[ FCOE_CTLR_DISABLED ] = "0", |
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}; |
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fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state, |
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ctlr_enabled_state_names) |
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#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50 |
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|
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static ssize_t show_ctlr_enabled_state(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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const char *name; |
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name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled); |
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if (!name) |
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return -EINVAL; |
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return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN, |
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"%s\n", name); |
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} |
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static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR, |
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show_ctlr_enabled_state, |
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store_ctlr_enabled); |
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|
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static ssize_t store_ctlr_fip_resp(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr); |
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|
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mutex_lock(&fip->ctlr_mutex); |
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if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { |
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if (buf[0] == '1') { |
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fip->fip_resp = 1; |
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mutex_unlock(&fip->ctlr_mutex); |
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return count; |
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} |
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if (buf[0] == '0') { |
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fip->fip_resp = 0; |
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mutex_unlock(&fip->ctlr_mutex); |
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return count; |
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} |
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} |
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mutex_unlock(&fip->ctlr_mutex); |
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return -EINVAL; |
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} |
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|
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static ssize_t show_ctlr_fip_resp(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr); |
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|
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return sprintf(buf, "%d\n", fip->fip_resp ? 1 : 0); |
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} |
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|
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static FCOE_DEVICE_ATTR(ctlr, fip_vlan_responder, S_IRUGO | S_IWUSR, |
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show_ctlr_fip_resp, |
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store_ctlr_fip_resp); |
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|
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static ssize_t |
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fcoe_ctlr_var_store(u32 *var, const char *buf, size_t count) |
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{ |
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int err; |
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unsigned long v; |
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|
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err = kstrtoul(buf, 10, &v); |
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if (err || v > UINT_MAX) |
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return -EINVAL; |
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|
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*var = v; |
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|
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return count; |
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} |
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|
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static ssize_t store_ctlr_r_a_tov(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev); |
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struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
|
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if (ctlr_dev->enabled == FCOE_CTLR_ENABLED) |
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return -EBUSY; |
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if (ctlr_dev->enabled == FCOE_CTLR_DISABLED) |
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return fcoe_ctlr_var_store(&ctlr->lp->r_a_tov, buf, count); |
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return -ENOTSUPP; |
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} |
|
|
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static ssize_t show_ctlr_r_a_tov(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev); |
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struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
|
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return sprintf(buf, "%d\n", ctlr->lp->r_a_tov); |
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} |
|
|
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static FCOE_DEVICE_ATTR(ctlr, r_a_tov, S_IRUGO | S_IWUSR, |
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show_ctlr_r_a_tov, store_ctlr_r_a_tov); |
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|
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static ssize_t store_ctlr_e_d_tov(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev); |
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struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
|
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if (ctlr_dev->enabled == FCOE_CTLR_ENABLED) |
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return -EBUSY; |
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if (ctlr_dev->enabled == FCOE_CTLR_DISABLED) |
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return fcoe_ctlr_var_store(&ctlr->lp->e_d_tov, buf, count); |
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return -ENOTSUPP; |
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} |
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|
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static ssize_t show_ctlr_e_d_tov(struct device *dev, |
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struct device_attribute *attr, |
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char *buf) |
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{ |
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struct fcoe_ctlr_device *ctlr_dev = dev_to_ctlr(dev); |
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struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); |
|
|
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return sprintf(buf, "%d\n", ctlr->lp->e_d_tov); |
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} |
|
|
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static FCOE_DEVICE_ATTR(ctlr, e_d_tov, S_IRUGO | S_IWUSR, |
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show_ctlr_e_d_tov, store_ctlr_e_d_tov); |
|
|
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static ssize_t |
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store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
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struct fcoe_fcf_device *fcf; |
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unsigned long val; |
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int rc; |
|
|
|
rc = fcoe_str_to_dev_loss(buf, &val); |
|
if (rc) |
|
return rc; |
|
|
|
fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val; |
|
mutex_lock(&ctlr->lock); |
|
list_for_each_entry(fcf, &ctlr->fcfs, peers) |
|
fcoe_fcf_set_dev_loss_tmo(fcf, val); |
|
mutex_unlock(&ctlr->lock); |
|
return count; |
|
} |
|
fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, ); |
|
static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR, |
|
show_fcoe_ctlr_device_fcf_dev_loss_tmo, |
|
store_private_fcoe_ctlr_fcf_dev_loss_tmo); |
|
|
|
/* Link Error Status Block (LESB) */ |
|
fcoe_ctlr_rd_attr(link_fail, "%u\n", 20); |
|
fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20); |
|
fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20); |
|
fcoe_ctlr_rd_attr(symb_err, "%u\n", 20); |
|
fcoe_ctlr_rd_attr(err_block, "%u\n", 20); |
|
fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20); |
|
|
|
fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); |
|
fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long); |
|
fcoe_fcf_private_rd_attr(priority, "%u\n", 20); |
|
fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20); |
|
fcoe_fcf_private_rd_attr(vfid, "%u\n", 20); |
|
fcoe_fcf_private_rd_attr(mac, "%pM\n", 20); |
|
fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20); |
|
fcoe_fcf_rd_attr(selected, "%u\n", 20); |
|
fcoe_fcf_rd_attr(vlan_id, "%u\n", 20); |
|
|
|
fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, ) |
|
static ssize_t |
|
store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
|
unsigned long val; |
|
int rc; |
|
|
|
rc = fcoe_str_to_dev_loss(buf, &val); |
|
if (rc) |
|
return rc; |
|
|
|
rc = fcoe_fcf_set_dev_loss_tmo(fcf, val); |
|
if (rc) |
|
return rc; |
|
return count; |
|
} |
|
static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR, |
|
show_fcoe_fcf_device_dev_loss_tmo, |
|
store_fcoe_fcf_dev_loss_tmo); |
|
|
|
static struct attribute *fcoe_ctlr_lesb_attrs[] = { |
|
&device_attr_fcoe_ctlr_link_fail.attr, |
|
&device_attr_fcoe_ctlr_vlink_fail.attr, |
|
&device_attr_fcoe_ctlr_miss_fka.attr, |
|
&device_attr_fcoe_ctlr_symb_err.attr, |
|
&device_attr_fcoe_ctlr_err_block.attr, |
|
&device_attr_fcoe_ctlr_fcs_error.attr, |
|
NULL, |
|
}; |
|
|
|
static struct attribute_group fcoe_ctlr_lesb_attr_group = { |
|
.name = "lesb", |
|
.attrs = fcoe_ctlr_lesb_attrs, |
|
}; |
|
|
|
static struct attribute *fcoe_ctlr_attrs[] = { |
|
&device_attr_fcoe_ctlr_fip_vlan_responder.attr, |
|
&device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr, |
|
&device_attr_fcoe_ctlr_r_a_tov.attr, |
|
&device_attr_fcoe_ctlr_e_d_tov.attr, |
|
&device_attr_fcoe_ctlr_enabled.attr, |
|
&device_attr_fcoe_ctlr_mode.attr, |
|
NULL, |
|
}; |
|
|
|
static struct attribute_group fcoe_ctlr_attr_group = { |
|
.attrs = fcoe_ctlr_attrs, |
|
}; |
|
|
|
static const struct attribute_group *fcoe_ctlr_attr_groups[] = { |
|
&fcoe_ctlr_attr_group, |
|
&fcoe_ctlr_lesb_attr_group, |
|
NULL, |
|
}; |
|
|
|
static struct attribute *fcoe_fcf_attrs[] = { |
|
&device_attr_fcoe_fcf_fabric_name.attr, |
|
&device_attr_fcoe_fcf_switch_name.attr, |
|
&device_attr_fcoe_fcf_dev_loss_tmo.attr, |
|
&device_attr_fcoe_fcf_fc_map.attr, |
|
&device_attr_fcoe_fcf_vfid.attr, |
|
&device_attr_fcoe_fcf_mac.attr, |
|
&device_attr_fcoe_fcf_priority.attr, |
|
&device_attr_fcoe_fcf_fka_period.attr, |
|
&device_attr_fcoe_fcf_state.attr, |
|
&device_attr_fcoe_fcf_selected.attr, |
|
&device_attr_fcoe_fcf_vlan_id.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute_group fcoe_fcf_attr_group = { |
|
.attrs = fcoe_fcf_attrs, |
|
}; |
|
|
|
static const struct attribute_group *fcoe_fcf_attr_groups[] = { |
|
&fcoe_fcf_attr_group, |
|
NULL, |
|
}; |
|
|
|
static struct bus_type fcoe_bus_type; |
|
|
|
static int fcoe_bus_match(struct device *dev, |
|
struct device_driver *drv) |
|
{ |
|
if (dev->bus == &fcoe_bus_type) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_device_release() - Release the FIP ctlr memory |
|
* @dev: Pointer to the FIP ctlr's embedded device |
|
* |
|
* Called when the last FIP ctlr reference is released. |
|
*/ |
|
static void fcoe_ctlr_device_release(struct device *dev) |
|
{ |
|
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
|
kfree(ctlr); |
|
} |
|
|
|
/** |
|
* fcoe_fcf_device_release() - Release the FIP fcf memory |
|
* @dev: Pointer to the fcf's embedded device |
|
* |
|
* Called when the last FIP fcf reference is released. |
|
*/ |
|
static void fcoe_fcf_device_release(struct device *dev) |
|
{ |
|
struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
|
kfree(fcf); |
|
} |
|
|
|
static const struct device_type fcoe_ctlr_device_type = { |
|
.name = "fcoe_ctlr", |
|
.groups = fcoe_ctlr_attr_groups, |
|
.release = fcoe_ctlr_device_release, |
|
}; |
|
|
|
static const struct device_type fcoe_fcf_device_type = { |
|
.name = "fcoe_fcf", |
|
.groups = fcoe_fcf_attr_groups, |
|
.release = fcoe_fcf_device_release, |
|
}; |
|
|
|
static ssize_t ctlr_create_store(struct bus_type *bus, const char *buf, |
|
size_t count) |
|
{ |
|
return fcoe_ctlr_create_store(bus, buf, count); |
|
} |
|
static BUS_ATTR_WO(ctlr_create); |
|
|
|
static ssize_t ctlr_destroy_store(struct bus_type *bus, const char *buf, |
|
size_t count) |
|
{ |
|
return fcoe_ctlr_destroy_store(bus, buf, count); |
|
} |
|
static BUS_ATTR_WO(ctlr_destroy); |
|
|
|
static struct attribute *fcoe_bus_attrs[] = { |
|
&bus_attr_ctlr_create.attr, |
|
&bus_attr_ctlr_destroy.attr, |
|
NULL, |
|
}; |
|
ATTRIBUTE_GROUPS(fcoe_bus); |
|
|
|
static struct bus_type fcoe_bus_type = { |
|
.name = "fcoe", |
|
.match = &fcoe_bus_match, |
|
.bus_groups = fcoe_bus_groups, |
|
}; |
|
|
|
/** |
|
* fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue |
|
* @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed |
|
*/ |
|
static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr) |
|
{ |
|
if (!fcoe_ctlr_work_q(ctlr)) { |
|
printk(KERN_ERR |
|
"ERROR: FIP Ctlr '%d' attempted to flush work, " |
|
"when no workqueue created.\n", ctlr->id); |
|
dump_stack(); |
|
return; |
|
} |
|
|
|
flush_workqueue(fcoe_ctlr_work_q(ctlr)); |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue |
|
* @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue |
|
* @work: Work to queue for execution |
|
* |
|
* Return value: |
|
* 1 on success / 0 already queued / < 0 for error |
|
*/ |
|
static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr, |
|
struct work_struct *work) |
|
{ |
|
if (unlikely(!fcoe_ctlr_work_q(ctlr))) { |
|
printk(KERN_ERR |
|
"ERROR: FIP Ctlr '%d' attempted to queue work, " |
|
"when no workqueue created.\n", ctlr->id); |
|
dump_stack(); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
return queue_work(fcoe_ctlr_work_q(ctlr), work); |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue |
|
* @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed |
|
*/ |
|
static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr) |
|
{ |
|
if (!fcoe_ctlr_devloss_work_q(ctlr)) { |
|
printk(KERN_ERR |
|
"ERROR: FIP Ctlr '%d' attempted to flush work, " |
|
"when no workqueue created.\n", ctlr->id); |
|
dump_stack(); |
|
return; |
|
} |
|
|
|
flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr)); |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue |
|
* @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue |
|
* @work: Work to queue for execution |
|
* @delay: jiffies to delay the work queuing |
|
* |
|
* Return value: |
|
* 1 on success / 0 already queued / < 0 for error |
|
*/ |
|
static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr, |
|
struct delayed_work *work, |
|
unsigned long delay) |
|
{ |
|
if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) { |
|
printk(KERN_ERR |
|
"ERROR: FIP Ctlr '%d' attempted to queue work, " |
|
"when no workqueue created.\n", ctlr->id); |
|
dump_stack(); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay); |
|
} |
|
|
|
static int fcoe_fcf_device_match(struct fcoe_fcf_device *new, |
|
struct fcoe_fcf_device *old) |
|
{ |
|
if (new->switch_name == old->switch_name && |
|
new->fabric_name == old->fabric_name && |
|
new->fc_map == old->fc_map && |
|
ether_addr_equal(new->mac, old->mac)) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs |
|
* @parent: The parent device to which the fcoe_ctlr instance |
|
* should be attached |
|
* @f: The LLD's FCoE sysfs function template pointer |
|
* @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD |
|
* |
|
* This routine allocates a FIP ctlr object with some additional memory |
|
* for the LLD. The FIP ctlr is initialized, added to sysfs and then |
|
* attributes are added to it. |
|
*/ |
|
struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent, |
|
struct fcoe_sysfs_function_template *f, |
|
int priv_size) |
|
{ |
|
struct fcoe_ctlr_device *ctlr; |
|
int error = 0; |
|
|
|
ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size, |
|
GFP_KERNEL); |
|
if (!ctlr) |
|
goto out; |
|
|
|
ctlr->id = atomic_inc_return(&ctlr_num) - 1; |
|
ctlr->f = f; |
|
ctlr->mode = FIP_CONN_TYPE_FABRIC; |
|
INIT_LIST_HEAD(&ctlr->fcfs); |
|
mutex_init(&ctlr->lock); |
|
ctlr->dev.parent = parent; |
|
ctlr->dev.bus = &fcoe_bus_type; |
|
ctlr->dev.type = &fcoe_ctlr_device_type; |
|
|
|
ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo; |
|
|
|
snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name), |
|
"ctlr_wq_%d", ctlr->id); |
|
ctlr->work_q = create_singlethread_workqueue( |
|
ctlr->work_q_name); |
|
if (!ctlr->work_q) |
|
goto out_del; |
|
|
|
snprintf(ctlr->devloss_work_q_name, |
|
sizeof(ctlr->devloss_work_q_name), |
|
"ctlr_dl_wq_%d", ctlr->id); |
|
ctlr->devloss_work_q = create_singlethread_workqueue( |
|
ctlr->devloss_work_q_name); |
|
if (!ctlr->devloss_work_q) |
|
goto out_del_q; |
|
|
|
dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id); |
|
error = device_register(&ctlr->dev); |
|
if (error) |
|
goto out_del_q2; |
|
|
|
return ctlr; |
|
|
|
out_del_q2: |
|
destroy_workqueue(ctlr->devloss_work_q); |
|
ctlr->devloss_work_q = NULL; |
|
out_del_q: |
|
destroy_workqueue(ctlr->work_q); |
|
ctlr->work_q = NULL; |
|
out_del: |
|
kfree(ctlr); |
|
out: |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add); |
|
|
|
/** |
|
* fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs |
|
* @ctlr: A pointer to the ctlr to be deleted |
|
* |
|
* Deletes a FIP ctlr and any fcfs attached |
|
* to it. Deleting fcfs will cause their childen |
|
* to be deleted as well. |
|
* |
|
* The ctlr is detached from sysfs and it's resources |
|
* are freed (work q), but the memory is not freed |
|
* until its last reference is released. |
|
* |
|
* This routine expects no locks to be held before |
|
* calling. |
|
* |
|
* TODO: Currently there are no callbacks to clean up LLD data |
|
* for a fcoe_fcf_device. LLDs must keep this in mind as they need |
|
* to clean up each of their LLD data for all fcoe_fcf_device before |
|
* calling fcoe_ctlr_device_delete. |
|
*/ |
|
void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr) |
|
{ |
|
struct fcoe_fcf_device *fcf, *next; |
|
/* Remove any attached fcfs */ |
|
mutex_lock(&ctlr->lock); |
|
list_for_each_entry_safe(fcf, next, |
|
&ctlr->fcfs, peers) { |
|
list_del(&fcf->peers); |
|
fcf->state = FCOE_FCF_STATE_DELETED; |
|
fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work); |
|
} |
|
mutex_unlock(&ctlr->lock); |
|
|
|
fcoe_ctlr_device_flush_work(ctlr); |
|
|
|
destroy_workqueue(ctlr->devloss_work_q); |
|
ctlr->devloss_work_q = NULL; |
|
destroy_workqueue(ctlr->work_q); |
|
ctlr->work_q = NULL; |
|
|
|
device_unregister(&ctlr->dev); |
|
} |
|
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete); |
|
|
|
/** |
|
* fcoe_fcf_device_final_delete() - Final delete routine |
|
* @work: The FIP fcf's embedded work struct |
|
* |
|
* It is expected that the fcf has been removed from |
|
* the FIP ctlr's list before calling this routine. |
|
*/ |
|
static void fcoe_fcf_device_final_delete(struct work_struct *work) |
|
{ |
|
struct fcoe_fcf_device *fcf = |
|
container_of(work, struct fcoe_fcf_device, delete_work); |
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
|
|
|
/* |
|
* Cancel any outstanding timers. These should really exist |
|
* only when rmmod'ing the LLDD and we're asking for |
|
* immediate termination of the rports |
|
*/ |
|
if (!cancel_delayed_work(&fcf->dev_loss_work)) |
|
fcoe_ctlr_device_flush_devloss(ctlr); |
|
|
|
device_unregister(&fcf->dev); |
|
} |
|
|
|
/** |
|
* fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires |
|
* @work: The FIP fcf's embedded work struct |
|
* |
|
* Removes the fcf from the FIP ctlr's list of fcfs and |
|
* queues the final deletion. |
|
*/ |
|
static void fip_timeout_deleted_fcf(struct work_struct *work) |
|
{ |
|
struct fcoe_fcf_device *fcf = |
|
container_of(work, struct fcoe_fcf_device, dev_loss_work.work); |
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
|
|
|
mutex_lock(&ctlr->lock); |
|
|
|
/* |
|
* If the fcf is deleted or reconnected before the timer |
|
* fires the devloss queue will be flushed, but the state will |
|
* either be CONNECTED or DELETED. If that is the case we |
|
* cancel deleting the fcf. |
|
*/ |
|
if (fcf->state != FCOE_FCF_STATE_DISCONNECTED) |
|
goto out; |
|
|
|
dev_printk(KERN_ERR, &fcf->dev, |
|
"FIP fcf connection time out: removing fcf\n"); |
|
|
|
list_del(&fcf->peers); |
|
fcf->state = FCOE_FCF_STATE_DELETED; |
|
fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work); |
|
|
|
out: |
|
mutex_unlock(&ctlr->lock); |
|
} |
|
|
|
/** |
|
* fcoe_fcf_device_delete() - Delete a FIP fcf |
|
* @fcf: Pointer to the fcf which is to be deleted |
|
* |
|
* Queues the FIP fcf on the devloss workqueue |
|
* |
|
* Expects the ctlr_attrs mutex to be held for fcf |
|
* state change. |
|
*/ |
|
void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf) |
|
{ |
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); |
|
int timeout = fcf->dev_loss_tmo; |
|
|
|
if (fcf->state != FCOE_FCF_STATE_CONNECTED) |
|
return; |
|
|
|
fcf->state = FCOE_FCF_STATE_DISCONNECTED; |
|
|
|
/* |
|
* FCF will only be re-connected by the LLD calling |
|
* fcoe_fcf_device_add, and it should be setting up |
|
* priv then. |
|
*/ |
|
fcf->priv = NULL; |
|
|
|
fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work, |
|
timeout * HZ); |
|
} |
|
EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete); |
|
|
|
/** |
|
* fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system |
|
* @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent |
|
* @new_fcf: A temporary FCF used for lookups on the current list of fcfs |
|
* |
|
* Expects to be called with the ctlr->lock held |
|
*/ |
|
struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr, |
|
struct fcoe_fcf_device *new_fcf) |
|
{ |
|
struct fcoe_fcf_device *fcf; |
|
int error = 0; |
|
|
|
list_for_each_entry(fcf, &ctlr->fcfs, peers) { |
|
if (fcoe_fcf_device_match(new_fcf, fcf)) { |
|
if (fcf->state == FCOE_FCF_STATE_CONNECTED) |
|
return fcf; |
|
|
|
fcf->state = FCOE_FCF_STATE_CONNECTED; |
|
|
|
if (!cancel_delayed_work(&fcf->dev_loss_work)) |
|
fcoe_ctlr_device_flush_devloss(ctlr); |
|
|
|
return fcf; |
|
} |
|
} |
|
|
|
fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC); |
|
if (unlikely(!fcf)) |
|
goto out; |
|
|
|
INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete); |
|
INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf); |
|
|
|
fcf->dev.parent = &ctlr->dev; |
|
fcf->dev.bus = &fcoe_bus_type; |
|
fcf->dev.type = &fcoe_fcf_device_type; |
|
fcf->id = atomic_inc_return(&fcf_num) - 1; |
|
fcf->state = FCOE_FCF_STATE_UNKNOWN; |
|
|
|
fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo; |
|
|
|
dev_set_name(&fcf->dev, "fcf_%d", fcf->id); |
|
|
|
fcf->fabric_name = new_fcf->fabric_name; |
|
fcf->switch_name = new_fcf->switch_name; |
|
fcf->fc_map = new_fcf->fc_map; |
|
fcf->vfid = new_fcf->vfid; |
|
memcpy(fcf->mac, new_fcf->mac, ETH_ALEN); |
|
fcf->priority = new_fcf->priority; |
|
fcf->fka_period = new_fcf->fka_period; |
|
fcf->selected = new_fcf->selected; |
|
|
|
error = device_register(&fcf->dev); |
|
if (error) |
|
goto out_del; |
|
|
|
fcf->state = FCOE_FCF_STATE_CONNECTED; |
|
list_add_tail(&fcf->peers, &ctlr->fcfs); |
|
|
|
return fcf; |
|
|
|
out_del: |
|
kfree(fcf); |
|
out: |
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(fcoe_fcf_device_add); |
|
|
|
int __init fcoe_sysfs_setup(void) |
|
{ |
|
atomic_set(&ctlr_num, 0); |
|
atomic_set(&fcf_num, 0); |
|
|
|
return bus_register(&fcoe_bus_type); |
|
} |
|
|
|
void __exit fcoe_sysfs_teardown(void) |
|
{ |
|
bus_unregister(&fcoe_bus_type); |
|
}
|
|
|