34980ca8fa
A kset should not have its name set directly, so dynamically set the name at runtime. This is needed to remove the static array in the kobject structure which will be changed in a future patch. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/*
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* Interface for Dynamic Logical Partitioning of I/O Slots on
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* RPA-compliant PPC64 platform.
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*
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* John Rose <johnrose@austin.ibm.com>
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* October 2003
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*
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* Copyright (C) 2003 IBM.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kobject.h>
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#include <linux/string.h>
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#include <linux/pci_hotplug.h>
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#include "rpadlpar.h"
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#define DLPAR_KOBJ_NAME "control"
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#define ADD_SLOT_ATTR_NAME "add_slot"
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#define REMOVE_SLOT_ATTR_NAME "remove_slot"
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#define MAX_DRC_NAME_LEN 64
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/* Store return code of dlpar operation in attribute struct */
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struct dlpar_io_attr {
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int rc;
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struct attribute attr;
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ssize_t (*store)(struct dlpar_io_attr *dlpar_attr, const char *buf,
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size_t nbytes);
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};
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/* Common show callback for all attrs, display the return code
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* of the dlpar op */
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static ssize_t
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dlpar_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
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{
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struct dlpar_io_attr *dlpar_attr = container_of(attr,
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struct dlpar_io_attr, attr);
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return sprintf(buf, "%d\n", dlpar_attr->rc);
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}
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static ssize_t
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dlpar_attr_store(struct kobject * kobj, struct attribute * attr,
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const char *buf, size_t nbytes)
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{
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struct dlpar_io_attr *dlpar_attr = container_of(attr,
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struct dlpar_io_attr, attr);
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return dlpar_attr->store ?
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dlpar_attr->store(dlpar_attr, buf, nbytes) : -EIO;
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}
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static struct sysfs_ops dlpar_attr_sysfs_ops = {
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.show = dlpar_attr_show,
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.store = dlpar_attr_store,
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};
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static ssize_t add_slot_store(struct dlpar_io_attr *dlpar_attr,
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const char *buf, size_t nbytes)
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{
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char drc_name[MAX_DRC_NAME_LEN];
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char *end;
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if (nbytes >= MAX_DRC_NAME_LEN)
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return 0;
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memcpy(drc_name, buf, nbytes);
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end = strchr(drc_name, '\n');
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if (!end)
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end = &drc_name[nbytes];
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*end = '\0';
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dlpar_attr->rc = dlpar_add_slot(drc_name);
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return nbytes;
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}
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static ssize_t remove_slot_store(struct dlpar_io_attr *dlpar_attr,
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const char *buf, size_t nbytes)
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{
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char drc_name[MAX_DRC_NAME_LEN];
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char *end;
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if (nbytes >= MAX_DRC_NAME_LEN)
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return 0;
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memcpy(drc_name, buf, nbytes);
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end = strchr(drc_name, '\n');
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if (!end)
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end = &drc_name[nbytes];
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*end = '\0';
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dlpar_attr->rc = dlpar_remove_slot(drc_name);
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return nbytes;
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}
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static struct dlpar_io_attr add_slot_attr = {
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.rc = 0,
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.attr = { .name = ADD_SLOT_ATTR_NAME, .mode = 0644, },
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.store = add_slot_store,
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};
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static struct dlpar_io_attr remove_slot_attr = {
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.rc = 0,
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.attr = { .name = REMOVE_SLOT_ATTR_NAME, .mode = 0644},
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.store = remove_slot_store,
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};
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static struct attribute *default_attrs[] = {
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&add_slot_attr.attr,
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&remove_slot_attr.attr,
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NULL,
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};
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static void dlpar_io_release(struct kobject *kobj)
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{
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/* noop */
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return;
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}
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struct kobj_type ktype_dlpar_io = {
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.release = dlpar_io_release,
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.sysfs_ops = &dlpar_attr_sysfs_ops,
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.default_attrs = default_attrs,
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};
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struct kset dlpar_io_kset = {
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.kobj = {.ktype = &ktype_dlpar_io,
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.parent = &pci_hotplug_slots_subsys.kobj},
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.ktype = &ktype_dlpar_io,
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};
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int dlpar_sysfs_init(void)
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{
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kobject_set_name(&dlpar_io_kset.kobj, DLPAR_KOBJ_NAME);
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if (kset_register(&dlpar_io_kset)) {
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printk(KERN_ERR "rpadlpar_io: cannot register kset for %s\n",
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kobject_name(&dlpar_io_kset.kobj));
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return -EINVAL;
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}
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return 0;
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}
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void dlpar_sysfs_exit(void)
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{
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kset_unregister(&dlpar_io_kset);
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}
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