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![tonyj@suse.de](/assets/img/avatar_default.png)
Convert from class_device to device in drivers/char. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
953 lines
21 KiB
C
953 lines
21 KiB
C
/*
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* ipmi_devintf.c
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*
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* Linux device interface for the IPMI message handler.
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*
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* Author: MontaVista Software, Inc.
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* Corey Minyard <minyard@mvista.com>
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* source@mvista.com
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*
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* Copyright 2002 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/errno.h>
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#include <asm/system.h>
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#include <linux/poll.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/ipmi.h>
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#include <linux/mutex.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/compat.h>
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struct ipmi_file_private
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{
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ipmi_user_t user;
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spinlock_t recv_msg_lock;
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struct list_head recv_msgs;
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struct file *file;
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struct fasync_struct *fasync_queue;
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wait_queue_head_t wait;
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struct mutex recv_mutex;
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int default_retries;
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unsigned int default_retry_time_ms;
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};
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static void file_receive_handler(struct ipmi_recv_msg *msg,
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void *handler_data)
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{
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struct ipmi_file_private *priv = handler_data;
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int was_empty;
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unsigned long flags;
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spin_lock_irqsave(&(priv->recv_msg_lock), flags);
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was_empty = list_empty(&(priv->recv_msgs));
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list_add_tail(&(msg->link), &(priv->recv_msgs));
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if (was_empty) {
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wake_up_interruptible(&priv->wait);
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kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN);
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}
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spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
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}
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static unsigned int ipmi_poll(struct file *file, poll_table *wait)
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{
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struct ipmi_file_private *priv = file->private_data;
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unsigned int mask = 0;
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unsigned long flags;
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poll_wait(file, &priv->wait, wait);
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spin_lock_irqsave(&priv->recv_msg_lock, flags);
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if (!list_empty(&(priv->recv_msgs)))
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mask |= (POLLIN | POLLRDNORM);
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spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
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return mask;
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}
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static int ipmi_fasync(int fd, struct file *file, int on)
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{
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struct ipmi_file_private *priv = file->private_data;
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int result;
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result = fasync_helper(fd, file, on, &priv->fasync_queue);
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return (result);
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}
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static struct ipmi_user_hndl ipmi_hndlrs =
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{
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.ipmi_recv_hndl = file_receive_handler,
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};
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static int ipmi_open(struct inode *inode, struct file *file)
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{
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int if_num = iminor(inode);
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int rv;
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struct ipmi_file_private *priv;
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priv = kmalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->file = file;
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rv = ipmi_create_user(if_num,
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&ipmi_hndlrs,
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priv,
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&(priv->user));
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if (rv) {
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kfree(priv);
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return rv;
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}
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file->private_data = priv;
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spin_lock_init(&(priv->recv_msg_lock));
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INIT_LIST_HEAD(&(priv->recv_msgs));
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init_waitqueue_head(&priv->wait);
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priv->fasync_queue = NULL;
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mutex_init(&priv->recv_mutex);
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/* Use the low-level defaults. */
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priv->default_retries = -1;
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priv->default_retry_time_ms = 0;
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return 0;
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}
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static int ipmi_release(struct inode *inode, struct file *file)
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{
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struct ipmi_file_private *priv = file->private_data;
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int rv;
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rv = ipmi_destroy_user(priv->user);
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if (rv)
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return rv;
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ipmi_fasync (-1, file, 0);
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/* FIXME - free the messages in the list. */
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kfree(priv);
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return 0;
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}
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static int handle_send_req(ipmi_user_t user,
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struct ipmi_req *req,
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int retries,
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unsigned int retry_time_ms)
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{
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int rv;
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struct ipmi_addr addr;
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struct kernel_ipmi_msg msg;
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if (req->addr_len > sizeof(struct ipmi_addr))
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return -EINVAL;
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if (copy_from_user(&addr, req->addr, req->addr_len))
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return -EFAULT;
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msg.netfn = req->msg.netfn;
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msg.cmd = req->msg.cmd;
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msg.data_len = req->msg.data_len;
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msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
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if (!msg.data)
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return -ENOMEM;
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/* From here out we cannot return, we must jump to "out" for
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error exits to free msgdata. */
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rv = ipmi_validate_addr(&addr, req->addr_len);
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if (rv)
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goto out;
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if (req->msg.data != NULL) {
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if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) {
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rv = -EMSGSIZE;
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goto out;
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}
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if (copy_from_user(msg.data,
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req->msg.data,
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req->msg.data_len))
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{
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rv = -EFAULT;
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goto out;
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}
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} else {
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msg.data_len = 0;
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}
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rv = ipmi_request_settime(user,
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&addr,
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req->msgid,
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&msg,
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NULL,
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0,
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retries,
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retry_time_ms);
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out:
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kfree(msg.data);
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return rv;
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}
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static int ipmi_ioctl(struct inode *inode,
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struct file *file,
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unsigned int cmd,
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unsigned long data)
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{
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int rv = -EINVAL;
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struct ipmi_file_private *priv = file->private_data;
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void __user *arg = (void __user *)data;
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switch (cmd)
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{
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case IPMICTL_SEND_COMMAND:
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{
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struct ipmi_req req;
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if (copy_from_user(&req, arg, sizeof(req))) {
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rv = -EFAULT;
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break;
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}
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rv = handle_send_req(priv->user,
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&req,
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priv->default_retries,
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priv->default_retry_time_ms);
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break;
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}
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case IPMICTL_SEND_COMMAND_SETTIME:
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{
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struct ipmi_req_settime req;
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if (copy_from_user(&req, arg, sizeof(req))) {
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rv = -EFAULT;
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break;
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}
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rv = handle_send_req(priv->user,
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&req.req,
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req.retries,
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req.retry_time_ms);
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break;
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}
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case IPMICTL_RECEIVE_MSG:
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case IPMICTL_RECEIVE_MSG_TRUNC:
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{
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struct ipmi_recv rsp;
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int addr_len;
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struct list_head *entry;
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struct ipmi_recv_msg *msg;
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unsigned long flags;
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rv = 0;
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if (copy_from_user(&rsp, arg, sizeof(rsp))) {
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rv = -EFAULT;
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break;
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}
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/* We claim a mutex because we don't want two
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users getting something from the queue at a time.
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Since we have to release the spinlock before we can
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copy the data to the user, it's possible another
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user will grab something from the queue, too. Then
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the messages might get out of order if something
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fails and the message gets put back onto the
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queue. This mutex prevents that problem. */
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mutex_lock(&priv->recv_mutex);
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/* Grab the message off the list. */
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spin_lock_irqsave(&(priv->recv_msg_lock), flags);
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if (list_empty(&(priv->recv_msgs))) {
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spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
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rv = -EAGAIN;
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goto recv_err;
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}
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entry = priv->recv_msgs.next;
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msg = list_entry(entry, struct ipmi_recv_msg, link);
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list_del(entry);
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spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
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addr_len = ipmi_addr_length(msg->addr.addr_type);
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if (rsp.addr_len < addr_len)
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{
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rv = -EINVAL;
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goto recv_putback_on_err;
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}
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if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) {
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rv = -EFAULT;
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goto recv_putback_on_err;
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}
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rsp.addr_len = addr_len;
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rsp.recv_type = msg->recv_type;
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rsp.msgid = msg->msgid;
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rsp.msg.netfn = msg->msg.netfn;
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rsp.msg.cmd = msg->msg.cmd;
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if (msg->msg.data_len > 0) {
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if (rsp.msg.data_len < msg->msg.data_len) {
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rv = -EMSGSIZE;
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if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) {
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msg->msg.data_len = rsp.msg.data_len;
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} else {
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goto recv_putback_on_err;
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}
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}
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if (copy_to_user(rsp.msg.data,
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msg->msg.data,
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msg->msg.data_len))
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{
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rv = -EFAULT;
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goto recv_putback_on_err;
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}
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rsp.msg.data_len = msg->msg.data_len;
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} else {
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rsp.msg.data_len = 0;
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}
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if (copy_to_user(arg, &rsp, sizeof(rsp))) {
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rv = -EFAULT;
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goto recv_putback_on_err;
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}
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mutex_unlock(&priv->recv_mutex);
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ipmi_free_recv_msg(msg);
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break;
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recv_putback_on_err:
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/* If we got an error, put the message back onto
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the head of the queue. */
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spin_lock_irqsave(&(priv->recv_msg_lock), flags);
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list_add(entry, &(priv->recv_msgs));
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spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
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mutex_unlock(&priv->recv_mutex);
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break;
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recv_err:
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mutex_unlock(&priv->recv_mutex);
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break;
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}
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case IPMICTL_REGISTER_FOR_CMD:
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{
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struct ipmi_cmdspec val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
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IPMI_CHAN_ALL);
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break;
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}
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case IPMICTL_UNREGISTER_FOR_CMD:
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{
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struct ipmi_cmdspec val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
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IPMI_CHAN_ALL);
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break;
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}
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case IPMICTL_REGISTER_FOR_CMD_CHANS:
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{
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struct ipmi_cmdspec_chans val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd,
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val.chans);
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break;
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}
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case IPMICTL_UNREGISTER_FOR_CMD_CHANS:
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{
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struct ipmi_cmdspec_chans val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd,
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val.chans);
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break;
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}
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case IPMICTL_SET_GETS_EVENTS_CMD:
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{
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int val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_set_gets_events(priv->user, val);
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break;
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}
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/* The next four are legacy, not per-channel. */
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case IPMICTL_SET_MY_ADDRESS_CMD:
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{
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unsigned int val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_set_my_address(priv->user, 0, val);
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break;
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}
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case IPMICTL_GET_MY_ADDRESS_CMD:
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{
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unsigned int val;
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unsigned char rval;
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rv = ipmi_get_my_address(priv->user, 0, &rval);
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if (rv)
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break;
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val = rval;
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if (copy_to_user(arg, &val, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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break;
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}
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case IPMICTL_SET_MY_LUN_CMD:
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{
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unsigned int val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_set_my_LUN(priv->user, 0, val);
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break;
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}
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case IPMICTL_GET_MY_LUN_CMD:
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{
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unsigned int val;
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unsigned char rval;
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rv = ipmi_get_my_LUN(priv->user, 0, &rval);
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if (rv)
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break;
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val = rval;
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if (copy_to_user(arg, &val, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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break;
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}
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case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD:
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{
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struct ipmi_channel_lun_address_set val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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return ipmi_set_my_address(priv->user, val.channel, val.value);
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break;
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}
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case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD:
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{
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struct ipmi_channel_lun_address_set val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_get_my_address(priv->user, val.channel, &val.value);
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if (rv)
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break;
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if (copy_to_user(arg, &val, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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break;
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}
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case IPMICTL_SET_MY_CHANNEL_LUN_CMD:
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{
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struct ipmi_channel_lun_address_set val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_set_my_LUN(priv->user, val.channel, val.value);
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break;
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}
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case IPMICTL_GET_MY_CHANNEL_LUN_CMD:
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{
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struct ipmi_channel_lun_address_set val;
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if (copy_from_user(&val, arg, sizeof(val))) {
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rv = -EFAULT;
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break;
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}
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rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value);
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if (rv)
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break;
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if (copy_to_user(arg, &val, sizeof(val))) {
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rv = -EFAULT;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IPMICTL_SET_TIMING_PARMS_CMD:
|
|
{
|
|
struct ipmi_timing_parms parms;
|
|
|
|
if (copy_from_user(&parms, arg, sizeof(parms))) {
|
|
rv = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
priv->default_retries = parms.retries;
|
|
priv->default_retry_time_ms = parms.retry_time_ms;
|
|
rv = 0;
|
|
break;
|
|
}
|
|
|
|
case IPMICTL_GET_TIMING_PARMS_CMD:
|
|
{
|
|
struct ipmi_timing_parms parms;
|
|
|
|
parms.retries = priv->default_retries;
|
|
parms.retry_time_ms = priv->default_retry_time_ms;
|
|
|
|
if (copy_to_user(arg, &parms, sizeof(parms))) {
|
|
rv = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
rv = 0;
|
|
break;
|
|
}
|
|
|
|
case IPMICTL_GET_MAINTENANCE_MODE_CMD:
|
|
{
|
|
int mode;
|
|
|
|
mode = ipmi_get_maintenance_mode(priv->user);
|
|
if (copy_to_user(arg, &mode, sizeof(mode))) {
|
|
rv = -EFAULT;
|
|
break;
|
|
}
|
|
rv = 0;
|
|
break;
|
|
}
|
|
|
|
case IPMICTL_SET_MAINTENANCE_MODE_CMD:
|
|
{
|
|
int mode;
|
|
|
|
if (copy_from_user(&mode, arg, sizeof(mode))) {
|
|
rv = -EFAULT;
|
|
break;
|
|
}
|
|
rv = ipmi_set_maintenance_mode(priv->user, mode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
/*
|
|
* The following code contains code for supporting 32-bit compatible
|
|
* ioctls on 64-bit kernels. This allows running 32-bit apps on the
|
|
* 64-bit kernel
|
|
*/
|
|
#define COMPAT_IPMICTL_SEND_COMMAND \
|
|
_IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req)
|
|
#define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \
|
|
_IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime)
|
|
#define COMPAT_IPMICTL_RECEIVE_MSG \
|
|
_IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv)
|
|
#define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \
|
|
_IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv)
|
|
|
|
struct compat_ipmi_msg {
|
|
u8 netfn;
|
|
u8 cmd;
|
|
u16 data_len;
|
|
compat_uptr_t data;
|
|
};
|
|
|
|
struct compat_ipmi_req {
|
|
compat_uptr_t addr;
|
|
compat_uint_t addr_len;
|
|
compat_long_t msgid;
|
|
struct compat_ipmi_msg msg;
|
|
};
|
|
|
|
struct compat_ipmi_recv {
|
|
compat_int_t recv_type;
|
|
compat_uptr_t addr;
|
|
compat_uint_t addr_len;
|
|
compat_long_t msgid;
|
|
struct compat_ipmi_msg msg;
|
|
};
|
|
|
|
struct compat_ipmi_req_settime {
|
|
struct compat_ipmi_req req;
|
|
compat_int_t retries;
|
|
compat_uint_t retry_time_ms;
|
|
};
|
|
|
|
/*
|
|
* Define some helper functions for copying IPMI data
|
|
*/
|
|
static long get_compat_ipmi_msg(struct ipmi_msg *p64,
|
|
struct compat_ipmi_msg __user *p32)
|
|
{
|
|
compat_uptr_t tmp;
|
|
|
|
if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
|
|
__get_user(p64->netfn, &p32->netfn) ||
|
|
__get_user(p64->cmd, &p32->cmd) ||
|
|
__get_user(p64->data_len, &p32->data_len) ||
|
|
__get_user(tmp, &p32->data))
|
|
return -EFAULT;
|
|
p64->data = compat_ptr(tmp);
|
|
return 0;
|
|
}
|
|
|
|
static long put_compat_ipmi_msg(struct ipmi_msg *p64,
|
|
struct compat_ipmi_msg __user *p32)
|
|
{
|
|
if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
|
|
__put_user(p64->netfn, &p32->netfn) ||
|
|
__put_user(p64->cmd, &p32->cmd) ||
|
|
__put_user(p64->data_len, &p32->data_len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static long get_compat_ipmi_req(struct ipmi_req *p64,
|
|
struct compat_ipmi_req __user *p32)
|
|
{
|
|
|
|
compat_uptr_t tmp;
|
|
|
|
if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
|
|
__get_user(tmp, &p32->addr) ||
|
|
__get_user(p64->addr_len, &p32->addr_len) ||
|
|
__get_user(p64->msgid, &p32->msgid) ||
|
|
get_compat_ipmi_msg(&p64->msg, &p32->msg))
|
|
return -EFAULT;
|
|
p64->addr = compat_ptr(tmp);
|
|
return 0;
|
|
}
|
|
|
|
static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
|
|
struct compat_ipmi_req_settime __user *p32)
|
|
{
|
|
if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
|
|
get_compat_ipmi_req(&p64->req, &p32->req) ||
|
|
__get_user(p64->retries, &p32->retries) ||
|
|
__get_user(p64->retry_time_ms, &p32->retry_time_ms))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static long get_compat_ipmi_recv(struct ipmi_recv *p64,
|
|
struct compat_ipmi_recv __user *p32)
|
|
{
|
|
compat_uptr_t tmp;
|
|
|
|
if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) ||
|
|
__get_user(p64->recv_type, &p32->recv_type) ||
|
|
__get_user(tmp, &p32->addr) ||
|
|
__get_user(p64->addr_len, &p32->addr_len) ||
|
|
__get_user(p64->msgid, &p32->msgid) ||
|
|
get_compat_ipmi_msg(&p64->msg, &p32->msg))
|
|
return -EFAULT;
|
|
p64->addr = compat_ptr(tmp);
|
|
return 0;
|
|
}
|
|
|
|
static long put_compat_ipmi_recv(struct ipmi_recv *p64,
|
|
struct compat_ipmi_recv __user *p32)
|
|
{
|
|
if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
|
|
__put_user(p64->recv_type, &p32->recv_type) ||
|
|
__put_user(p64->addr_len, &p32->addr_len) ||
|
|
__put_user(p64->msgid, &p32->msgid) ||
|
|
put_compat_ipmi_msg(&p64->msg, &p32->msg))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handle compatibility ioctls
|
|
*/
|
|
static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int rc;
|
|
struct ipmi_file_private *priv = filep->private_data;
|
|
|
|
switch(cmd) {
|
|
case COMPAT_IPMICTL_SEND_COMMAND:
|
|
{
|
|
struct ipmi_req rp;
|
|
|
|
if (get_compat_ipmi_req(&rp, compat_ptr(arg)))
|
|
return -EFAULT;
|
|
|
|
return handle_send_req(priv->user, &rp,
|
|
priv->default_retries,
|
|
priv->default_retry_time_ms);
|
|
}
|
|
case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
|
|
{
|
|
struct ipmi_req_settime sp;
|
|
|
|
if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg)))
|
|
return -EFAULT;
|
|
|
|
return handle_send_req(priv->user, &sp.req,
|
|
sp.retries, sp.retry_time_ms);
|
|
}
|
|
case COMPAT_IPMICTL_RECEIVE_MSG:
|
|
case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC:
|
|
{
|
|
struct ipmi_recv __user *precv64;
|
|
struct ipmi_recv recv64;
|
|
|
|
if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
|
|
return -EFAULT;
|
|
|
|
precv64 = compat_alloc_user_space(sizeof(recv64));
|
|
if (copy_to_user(precv64, &recv64, sizeof(recv64)))
|
|
return -EFAULT;
|
|
|
|
rc = ipmi_ioctl(filep->f_path.dentry->d_inode, filep,
|
|
((cmd == COMPAT_IPMICTL_RECEIVE_MSG)
|
|
? IPMICTL_RECEIVE_MSG
|
|
: IPMICTL_RECEIVE_MSG_TRUNC),
|
|
(unsigned long) precv64);
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
if (copy_from_user(&recv64, precv64, sizeof(recv64)))
|
|
return -EFAULT;
|
|
|
|
if (put_compat_ipmi_recv(&recv64, compat_ptr(arg)))
|
|
return -EFAULT;
|
|
|
|
return rc;
|
|
}
|
|
default:
|
|
return ipmi_ioctl(filep->f_path.dentry->d_inode, filep, cmd, arg);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static const struct file_operations ipmi_fops = {
|
|
.owner = THIS_MODULE,
|
|
.ioctl = ipmi_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = compat_ipmi_ioctl,
|
|
#endif
|
|
.open = ipmi_open,
|
|
.release = ipmi_release,
|
|
.fasync = ipmi_fasync,
|
|
.poll = ipmi_poll,
|
|
};
|
|
|
|
#define DEVICE_NAME "ipmidev"
|
|
|
|
static int ipmi_major;
|
|
module_param(ipmi_major, int, 0);
|
|
MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By"
|
|
" default, or if you set it to zero, it will choose the next"
|
|
" available device. Setting it to -1 will disable the"
|
|
" interface. Other values will set the major device number"
|
|
" to that value.");
|
|
|
|
/* Keep track of the devices that are registered. */
|
|
struct ipmi_reg_list {
|
|
dev_t dev;
|
|
struct list_head link;
|
|
};
|
|
static LIST_HEAD(reg_list);
|
|
static DEFINE_MUTEX(reg_list_mutex);
|
|
|
|
static struct class *ipmi_class;
|
|
|
|
static void ipmi_new_smi(int if_num, struct device *device)
|
|
{
|
|
dev_t dev = MKDEV(ipmi_major, if_num);
|
|
struct ipmi_reg_list *entry;
|
|
|
|
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry) {
|
|
printk(KERN_ERR "ipmi_devintf: Unable to create the"
|
|
" ipmi class device link\n");
|
|
return;
|
|
}
|
|
entry->dev = dev;
|
|
|
|
mutex_lock(®_list_mutex);
|
|
device_create(ipmi_class, device, dev, "ipmi%d", if_num);
|
|
list_add(&entry->link, ®_list);
|
|
mutex_unlock(®_list_mutex);
|
|
}
|
|
|
|
static void ipmi_smi_gone(int if_num)
|
|
{
|
|
dev_t dev = MKDEV(ipmi_major, if_num);
|
|
struct ipmi_reg_list *entry;
|
|
|
|
mutex_lock(®_list_mutex);
|
|
list_for_each_entry(entry, ®_list, link) {
|
|
if (entry->dev == dev) {
|
|
list_del(&entry->link);
|
|
kfree(entry);
|
|
break;
|
|
}
|
|
}
|
|
device_destroy(ipmi_class, dev);
|
|
mutex_unlock(®_list_mutex);
|
|
}
|
|
|
|
static struct ipmi_smi_watcher smi_watcher =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.new_smi = ipmi_new_smi,
|
|
.smi_gone = ipmi_smi_gone,
|
|
};
|
|
|
|
static __init int init_ipmi_devintf(void)
|
|
{
|
|
int rv;
|
|
|
|
if (ipmi_major < 0)
|
|
return -EINVAL;
|
|
|
|
printk(KERN_INFO "ipmi device interface\n");
|
|
|
|
ipmi_class = class_create(THIS_MODULE, "ipmi");
|
|
if (IS_ERR(ipmi_class)) {
|
|
printk(KERN_ERR "ipmi: can't register device class\n");
|
|
return PTR_ERR(ipmi_class);
|
|
}
|
|
|
|
rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
|
|
if (rv < 0) {
|
|
class_destroy(ipmi_class);
|
|
printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major);
|
|
return rv;
|
|
}
|
|
|
|
if (ipmi_major == 0) {
|
|
ipmi_major = rv;
|
|
}
|
|
|
|
rv = ipmi_smi_watcher_register(&smi_watcher);
|
|
if (rv) {
|
|
unregister_chrdev(ipmi_major, DEVICE_NAME);
|
|
class_destroy(ipmi_class);
|
|
printk(KERN_WARNING "ipmi: can't register smi watcher\n");
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
module_init(init_ipmi_devintf);
|
|
|
|
static __exit void cleanup_ipmi(void)
|
|
{
|
|
struct ipmi_reg_list *entry, *entry2;
|
|
mutex_lock(®_list_mutex);
|
|
list_for_each_entry_safe(entry, entry2, ®_list, link) {
|
|
list_del(&entry->link);
|
|
device_destroy(ipmi_class, entry->dev);
|
|
kfree(entry);
|
|
}
|
|
mutex_unlock(®_list_mutex);
|
|
class_destroy(ipmi_class);
|
|
ipmi_smi_watcher_unregister(&smi_watcher);
|
|
unregister_chrdev(ipmi_major, DEVICE_NAME);
|
|
}
|
|
module_exit(cleanup_ipmi);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
|
|
MODULE_DESCRIPTION("Linux device interface for the IPMI message handler.");
|