| /* |
| * Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Maintained at www.Open-FCoE.org |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ctype.h> |
| |
| #include <scsi/fcoe_sysfs.h> |
| #include <scsi/libfcoe.h> |
| |
| /* |
| * OK to include local libfcoe.h for debug_logging, but cannot include |
| * <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have |
| * have to include more than fcoe_sysfs.h. |
| */ |
| #include "libfcoe.h" |
| |
| static atomic_t ctlr_num; |
| static atomic_t fcf_num; |
| |
| /* |
| * fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs |
| * should insulate the loss of a fcf. |
| */ |
| static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */ |
| |
| module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo, |
| uint, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(fcf_dev_loss_tmo, |
| "Maximum number of seconds that libfcoe should" |
| " insulate the loss of a fcf. Once this value is" |
| " exceeded, the fcf is removed."); |
| |
| /* |
| * These are used by the fcoe_*_show_function routines, they |
| * are intentionally placed in the .c file as they're not intended |
| * for use throughout the code. |
| */ |
| #define fcoe_ctlr_id(x) \ |
| ((x)->id) |
| #define fcoe_ctlr_work_q_name(x) \ |
| ((x)->work_q_name) |
| #define fcoe_ctlr_work_q(x) \ |
| ((x)->work_q) |
| #define fcoe_ctlr_devloss_work_q_name(x) \ |
| ((x)->devloss_work_q_name) |
| #define fcoe_ctlr_devloss_work_q(x) \ |
| ((x)->devloss_work_q) |
| #define fcoe_ctlr_mode(x) \ |
| ((x)->mode) |
| #define fcoe_ctlr_fcf_dev_loss_tmo(x) \ |
| ((x)->fcf_dev_loss_tmo) |
| #define fcoe_ctlr_link_fail(x) \ |
| ((x)->lesb.lesb_link_fail) |
| #define fcoe_ctlr_vlink_fail(x) \ |
| ((x)->lesb.lesb_vlink_fail) |
| #define fcoe_ctlr_miss_fka(x) \ |
| ((x)->lesb.lesb_miss_fka) |
| #define fcoe_ctlr_symb_err(x) \ |
| ((x)->lesb.lesb_symb_err) |
| #define fcoe_ctlr_err_block(x) \ |
| ((x)->lesb.lesb_err_block) |
| #define fcoe_ctlr_fcs_error(x) \ |
| ((x)->lesb.lesb_fcs_error) |
| #define fcoe_ctlr_enabled(x) \ |
| ((x)->enabled) |
| #define fcoe_fcf_state(x) \ |
| ((x)->state) |
| #define fcoe_fcf_fabric_name(x) \ |
| ((x)->fabric_name) |
| #define fcoe_fcf_switch_name(x) \ |
| ((x)->switch_name) |
| #define fcoe_fcf_fc_map(x) \ |
| ((x)->fc_map) |
| #define fcoe_fcf_vfid(x) \ |
| ((x)->vfid) |
| #define fcoe_fcf_mac(x) \ |
| ((x)->mac) |
| #define fcoe_fcf_priority(x) \ |
| ((x)->priority) |
| #define fcoe_fcf_fka_period(x) \ |
| ((x)->fka_period) |
| #define fcoe_fcf_dev_loss_tmo(x) \ |
| ((x)->dev_loss_tmo) |
| #define fcoe_fcf_selected(x) \ |
| ((x)->selected) |
| #define fcoe_fcf_vlan_id(x) \ |
| ((x)->vlan_id) |
| |
| /* |
| * dev_loss_tmo attribute |
| */ |
| static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val) |
| { |
| int ret; |
| |
| ret = kstrtoul(buf, 0, val); |
| if (ret) |
| return -EINVAL; |
| /* |
| * Check for overflow; dev_loss_tmo is u32 |
| */ |
| if (*val > UINT_MAX) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf, |
| unsigned long val) |
| { |
| if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) || |
| (fcf->state == FCOE_FCF_STATE_DISCONNECTED) || |
| (fcf->state == FCOE_FCF_STATE_DELETED)) |
| return -EBUSY; |
| /* |
| * Check for overflow; dev_loss_tmo is u32 |
| */ |
| if (val > UINT_MAX) |
| return -EINVAL; |
| |
| fcoe_fcf_dev_loss_tmo(fcf) = val; |
| return 0; |
| } |
| |
| #define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \ |
| struct device_attribute device_attr_fcoe_##_prefix##_##_name = \ |
| __ATTR(_name, _mode, _show, _store) |
| |
| #define fcoe_ctlr_show_function(field, format_string, sz, cast) \ |
| static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
| if (ctlr->f->get_fcoe_ctlr_##field) \ |
| ctlr->f->get_fcoe_ctlr_##field(ctlr); \ |
| return snprintf(buf, sz, format_string, \ |
| cast fcoe_ctlr_##field(ctlr)); \ |
| } |
| |
| #define fcoe_fcf_show_function(field, format_string, sz, cast) \ |
| static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
| struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \ |
| if (ctlr->f->get_fcoe_fcf_##field) \ |
| ctlr->f->get_fcoe_fcf_##field(fcf); \ |
| return snprintf(buf, sz, format_string, \ |
| cast fcoe_fcf_##field(fcf)); \ |
| } |
| |
| #define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \ |
| static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \ |
| return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \ |
| } |
| |
| #define fcoe_fcf_private_show_function(field, format_string, sz, cast) \ |
| static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \ |
| return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \ |
| } |
| |
| #define fcoe_ctlr_private_rd_attr(field, format_string, sz) \ |
| fcoe_ctlr_private_show_function(field, format_string, sz, ) \ |
| static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| show_fcoe_ctlr_device_##field, NULL) |
| |
| #define fcoe_ctlr_rd_attr(field, format_string, sz) \ |
| fcoe_ctlr_show_function(field, format_string, sz, ) \ |
| static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| show_fcoe_ctlr_device_##field, NULL) |
| |
| #define fcoe_fcf_rd_attr(field, format_string, sz) \ |
| fcoe_fcf_show_function(field, format_string, sz, ) \ |
| static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| show_fcoe_fcf_device_##field, NULL) |
| |
| #define fcoe_fcf_private_rd_attr(field, format_string, sz) \ |
| fcoe_fcf_private_show_function(field, format_string, sz, ) \ |
| static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| show_fcoe_fcf_device_##field, NULL) |
| |
| #define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \ |
| fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \ |
| static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \ |
| show_fcoe_ctlr_device_##field, NULL) |
| |
| #define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \ |
| fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \ |
| static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \ |
| show_fcoe_fcf_device_##field, NULL) |
| |
| #define fcoe_enum_name_search(title, table_type, table) \ |
| static const char *get_fcoe_##title##_name(enum table_type table_key) \ |
| { \ |
| if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \ |
| return NULL; \ |
| return table[table_key]; \ |
| } |
| |
| static char *fip_conn_type_names[] = { |
| [ FIP_CONN_TYPE_UNKNOWN ] = "Unknown", |
| [ FIP_CONN_TYPE_FABRIC ] = "Fabric", |
| [ FIP_CONN_TYPE_VN2VN ] = "VN2VN", |
| }; |
| fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names) |
| |
| static enum fip_conn_type fcoe_parse_mode(const char *buf) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) { |
| if (strcasecmp(buf, fip_conn_type_names[i]) == 0) |
| return i; |
| } |
| |
| return FIP_CONN_TYPE_UNKNOWN; |
| } |
| |
| static char *fcf_state_names[] = { |
| [ FCOE_FCF_STATE_UNKNOWN ] = "Unknown", |
| [ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected", |
| [ FCOE_FCF_STATE_CONNECTED ] = "Connected", |
| }; |
| fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names) |
| #define FCOE_FCF_STATE_MAX_NAMELEN 50 |
| |
| static ssize_t show_fcf_state(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct fcoe_fcf_device *fcf = dev_to_fcf(dev); |
| const char *name; |
| name = get_fcoe_fcf_state_name(fcf->state); |
| if (!name) |
| return -EINVAL; |
| return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name); |
| } |
| static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL); |
| |
| #define FCOE_MAX_MODENAME_LEN 20 |
| static ssize_t show_ctlr_mode(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| const char *name; |
| |
| name = get_fcoe_ctlr_mode_name(ctlr->mode); |
| if (!name) |
| return -EINVAL; |
| return snprintf(buf, FCOE_MAX_MODENAME_LEN, |
| "%s\n", name); |
| } |
| |
| static ssize_t store_ctlr_mode(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| char mode[FCOE_MAX_MODENAME_LEN + 1]; |
| |
| if (count > FCOE_MAX_MODENAME_LEN) |
| return -EINVAL; |
| |
| strncpy(mode, buf, count); |
| |
| if (mode[count - 1] == '\n') |
| mode[count - 1] = '\0'; |
| else |
| mode[count] = '\0'; |
| |
| switch (ctlr->enabled) { |
| case FCOE_CTLR_ENABLED: |
| LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled."); |
| return -EBUSY; |
| case FCOE_CTLR_DISABLED: |
| if (!ctlr->f->set_fcoe_ctlr_mode) { |
| LIBFCOE_SYSFS_DBG(ctlr, |
| "Mode change not supported by LLD."); |
| return -ENOTSUPP; |
| } |
| |
| ctlr->mode = fcoe_parse_mode(mode); |
| if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) { |
| LIBFCOE_SYSFS_DBG(ctlr, |
| "Unknown mode %s provided.", buf); |
| return -EINVAL; |
| } |
| |
| ctlr->f->set_fcoe_ctlr_mode(ctlr); |
| LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.", buf); |
| |
| return count; |
| case FCOE_CTLR_UNUSED: |
| default: |
| LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported."); |
| return -ENOTSUPP; |
| }; |
| } |
| |
| static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR, |
| show_ctlr_mode, store_ctlr_mode); |
| |
| static ssize_t store_ctlr_enabled(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| int rc; |
| |
| switch (ctlr->enabled) { |
| case FCOE_CTLR_ENABLED: |
| if (*buf == '1') |
| return count; |
| ctlr->enabled = FCOE_CTLR_DISABLED; |
| break; |
| case FCOE_CTLR_DISABLED: |
| if (*buf == '0') |
| return count; |
| ctlr->enabled = FCOE_CTLR_ENABLED; |
| break; |
| case FCOE_CTLR_UNUSED: |
| return -ENOTSUPP; |
| }; |
| |
| rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr); |
| if (rc) |
| return rc; |
| |
| return count; |
| } |
| |
| static char *ctlr_enabled_state_names[] = { |
| [ FCOE_CTLR_ENABLED ] = "1", |
| [ FCOE_CTLR_DISABLED ] = "0", |
| }; |
| fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state, |
| ctlr_enabled_state_names) |
| #define FCOE_CTLR_ENABLED_MAX_NAMELEN 50 |
| |
| static ssize_t show_ctlr_enabled_state(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| const char *name; |
| |
| name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled); |
| if (!name) |
| return -EINVAL; |
| return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN, |
| "%s\n", name); |
| } |
| |
| static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR, |
| show_ctlr_enabled_state, |
| store_ctlr_enabled); |
| |
| static ssize_t |
| store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); |
| struct fcoe_fcf_device *fcf; |
| unsigned long val; |
| 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_fcf_dev_loss_tmo.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 struct device_type fcoe_ctlr_device_type = { |
| .name = "fcoe_ctlr", |
| .groups = fcoe_ctlr_attr_groups, |
| .release = fcoe_ctlr_device_release, |
| }; |
| |
| static struct device_type fcoe_fcf_device_type = { |
| .name = "fcoe_fcf", |
| .groups = fcoe_fcf_attr_groups, |
| .release = fcoe_fcf_device_release, |
| }; |
| |
| static BUS_ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store); |
| static BUS_ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store); |
| |
| static struct attribute *fcoe_bus_attrs[] = { |
| &bus_attr_ctlr_create.attr, |
| &bus_attr_ctrl_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 && |
| compare_ether_addr(new->mac, old->mac) == 0) |
| 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) |
| { |
| int error; |
| |
| atomic_set(&ctlr_num, 0); |
| atomic_set(&fcf_num, 0); |
| |
| error = bus_register(&fcoe_bus_type); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| void __exit fcoe_sysfs_teardown(void) |
| { |
| bus_unregister(&fcoe_bus_type); |
| } |