/* * linux/drivers/s390/scsi/zfcp_sysfs_unit.c * * FCP adapter driver for IBM eServer zSeries * * sysfs unit related routines * * (C) Copyright IBM Corp. 2003, 2004 * * Authors: * Martin Peschke <mpeschke@de.ibm.com> * Heiko Carstens <heiko.carstens@de.ibm.com> * Andreas Herrmann <aherrman@de.ibm.com> * Volker Sameske <sameske@de.ibm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define ZFCP_SYSFS_UNIT_C_REVISION "$Revision: 1.30 $" #include "zfcp_ext.h" #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG /** * zfcp_sysfs_unit_release - gets called when a struct device unit is released * @dev: pointer to belonging device */ void zfcp_sysfs_unit_release(struct device *dev) { kfree(dev); } /** * ZFCP_DEFINE_UNIT_ATTR * @_name: name of show attribute * @_format: format string * @_value: value to print * * Generates attribute for a unit. */ #define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value) \ static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct zfcp_unit *unit; \ \ unit = dev_get_drvdata(dev); \ return sprintf(buf, _format, _value); \ } \ \ static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL); ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status)); ZFCP_DEFINE_UNIT_ATTR(scsi_lun, "0x%x\n", unit->scsi_lun); ZFCP_DEFINE_UNIT_ATTR(in_recovery, "%d\n", atomic_test_mask (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)); ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status)); ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask (ZFCP_STATUS_UNIT_SHARED, &unit->status)); ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask (ZFCP_STATUS_UNIT_READONLY, &unit->status)); /** * zfcp_sysfs_unit_failed_store - failed state of unit * @dev: pointer to belonging device * @buf: pointer to input buffer * @count: number of bytes in buffer * * Store function of the "failed" attribute of a unit. * If a "0" gets written to "failed", error recovery will be * started for the belonging unit. */ static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct zfcp_unit *unit; unsigned int val; char *endp; int retval = 0; down(&zfcp_data.config_sema); unit = dev_get_drvdata(dev); if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) { retval = -EBUSY; goto out; } val = simple_strtoul(buf, &endp, 0); if (((endp + 1) < (buf + count)) || (val != 0)) { retval = -EINVAL; goto out; } zfcp_erp_modify_unit_status(unit, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED); zfcp_erp_wait(unit->port->adapter); out: up(&zfcp_data.config_sema); return retval ? retval : (ssize_t) count; } /** * zfcp_sysfs_unit_failed_show - failed state of unit * @dev: pointer to belonging device * @buf: pointer to input buffer * * Show function of "failed" attribute of unit. Will be * "0" if unit is working, otherwise "1". */ static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf) { struct zfcp_unit *unit; unit = dev_get_drvdata(dev); if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) return sprintf(buf, "1\n"); else return sprintf(buf, "0\n"); } static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show, zfcp_sysfs_unit_failed_store); static struct attribute *zfcp_unit_attrs[] = { &dev_attr_scsi_lun.attr, &dev_attr_failed.attr, &dev_attr_in_recovery.attr, &dev_attr_status.attr, &dev_attr_access_denied.attr, &dev_attr_access_shared.attr, &dev_attr_access_readonly.attr, NULL }; static struct attribute_group zfcp_unit_attr_group = { .attrs = zfcp_unit_attrs, }; /** * zfcp_sysfs_create_unit_files - create sysfs unit files * @dev: pointer to belonging device * * Create all attributes of the sysfs representation of a unit. */ int zfcp_sysfs_unit_create_files(struct device *dev) { return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group); } /** * zfcp_sysfs_remove_unit_files - remove sysfs unit files * @dev: pointer to belonging device * * Remove all attributes of the sysfs representation of a unit. */ void zfcp_sysfs_unit_remove_files(struct device *dev) { sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group); } #undef ZFCP_LOG_AREA