LXR linux/drivers/s390/scsi/zfcp_sysfs

   1/*
   2 * This file is part of the zfcp device driver for
   3 * FCP adapters for IBM System z9 and zSeries.
   4 *
   5 * (C) Copyright IBM Corp. 2002, 2006
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2, or (at your option)
  10 * any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22#include "zfcp_ext.h"
  23
  24#define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_CONFIG
  25
  26/**
  27 * ZFCP_DEFINE_DRIVER_ATTR - define for all loglevels sysfs attributes
  28 * @_name:       name of attribute
  29 * @_define:     name of ZFCP loglevel define
  30 *
  31 * Generates store function for a sysfs loglevel attribute of zfcp driver.
  32 */
  33#define ZFCP_DEFINE_DRIVER_ATTR(_name, _define)                               \
  34static ssize_t zfcp_sysfs_loglevel_##_name##_store(struct device_driver *drv, \
  35                                                   const char *buf,           \
  36                                                   size_t count)              \
  37{                                                                             \
  38        unsigned int loglevel;                                                \
  39        unsigned int new_loglevel;                                            \
  40        char *endp;                                                           \
  41                                                                              \
  42        new_loglevel = simple_strtoul(buf, &endp, 0);                         \
  43        if ((endp + 1) < (buf + count))                                       \
  44                return -EINVAL;                                               \
  45        if (new_loglevel > 3)                                                 \
  46                return -EINVAL;                                               \
  47        down(&zfcp_data.config_sema);                                         \
  48        loglevel = atomic_read(&zfcp_data.loglevel);                          \
  49        loglevel &= ~((unsigned int) 0xf << (ZFCP_LOG_AREA_##_define << 2));  \
  50        loglevel |= new_loglevel << (ZFCP_LOG_AREA_##_define << 2);           \
  51        atomic_set(&zfcp_data.loglevel, loglevel);                            \
  52        up(&zfcp_data.config_sema);                                           \
  53        return count;                                                         \
  54}                                                                             \
  55                                                                              \
  56static ssize_t zfcp_sysfs_loglevel_##_name##_show(struct device_driver *dev,  \
  57                                                  char *buf)                  \
  58{                                                                             \
  59        return sprintf(buf,"%d\n", (unsigned int)                             \
  60                       ZFCP_GET_LOG_VALUE(ZFCP_LOG_AREA_##_define));          \
  61}                                                                             \
  62                                                                              \
  63static DRIVER_ATTR(loglevel_##_name, S_IWUSR | S_IRUGO,                       \
  64                   zfcp_sysfs_loglevel_##_name##_show,                        \
  65                   zfcp_sysfs_loglevel_##_name##_store);
  66
  67ZFCP_DEFINE_DRIVER_ATTR(other, OTHER);
  68ZFCP_DEFINE_DRIVER_ATTR(scsi, SCSI);
  69ZFCP_DEFINE_DRIVER_ATTR(fsf, FSF);
  70ZFCP_DEFINE_DRIVER_ATTR(config, CONFIG);
  71ZFCP_DEFINE_DRIVER_ATTR(cio, CIO);
  72ZFCP_DEFINE_DRIVER_ATTR(qdio, QDIO);
  73ZFCP_DEFINE_DRIVER_ATTR(erp, ERP);
  74ZFCP_DEFINE_DRIVER_ATTR(fc, FC);
  75
  76static ssize_t zfcp_sysfs_version_show(struct device_driver *dev,
  77                                              char *buf)
  78{
  79        return sprintf(buf, "%s\n", zfcp_data.driver_version);
  80}
  81
  82static DRIVER_ATTR(version, S_IRUGO, zfcp_sysfs_version_show, NULL);
  83
  84static struct attribute *zfcp_driver_attrs[] = {
  85        &driver_attr_loglevel_other.attr,
  86        &driver_attr_loglevel_scsi.attr,
  87        &driver_attr_loglevel_fsf.attr,
  88        &driver_attr_loglevel_config.attr,
  89        &driver_attr_loglevel_cio.attr,
  90        &driver_attr_loglevel_qdio.attr,
  91        &driver_attr_loglevel_erp.attr,
  92        &driver_attr_loglevel_fc.attr,
  93        &driver_attr_version.attr,
  94        NULL
  95};
  96
  97static struct attribute_group zfcp_driver_attr_group = {
  98        .attrs = zfcp_driver_attrs,
  99};
 100
 101/**
 102 * zfcp_sysfs_create_driver_files - create sysfs driver files
 103 * @dev: pointer to belonging device
 104 *
 105 * Create all sysfs attributes of the zfcp device driver
 106 */
 107int
 108zfcp_sysfs_driver_create_files(struct device_driver *drv)
 109{
 110        return sysfs_create_group(&drv->kobj, &zfcp_driver_attr_group);
 111}
 112
 113/**
 114 * zfcp_sysfs_remove_driver_files - remove sysfs driver files
 115 * @dev: pointer to belonging device
 116 *
 117 * Remove all sysfs attributes of the zfcp device driver
 118 */
 119void
 120zfcp_sysfs_driver_remove_files(struct device_driver *drv)
 121{
 122        sysfs_remove_group(&drv->kobj, &zfcp_driver_attr_group);
 123}
 124
 125#undef ZFCP_LOG_AREA
 126