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path: root/drivers/char/ipmi/ipmi_devintf.c
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Diffstat (limited to 'drivers/char/ipmi/ipmi_devintf.c')
-rw-r--r--drivers/char/ipmi/ipmi_devintf.c129
1 files changed, 51 insertions, 78 deletions
diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
index 8ecfd47806fa..1a486aec99b6 100644
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -26,7 +26,7 @@
struct ipmi_file_private
{
- ipmi_user_t user;
+ struct ipmi_user *user;
spinlock_t recv_msg_lock;
struct list_head recv_msgs;
struct file *file;
@@ -37,7 +37,6 @@ struct ipmi_file_private
unsigned int default_retry_time_ms;
};
-static DEFINE_MUTEX(ipmi_mutex);
static void file_receive_handler(struct ipmi_recv_msg *msg,
void *handler_data)
{
@@ -45,17 +44,15 @@ static void file_receive_handler(struct ipmi_recv_msg *msg,
int was_empty;
unsigned long flags;
- spin_lock_irqsave(&(priv->recv_msg_lock), flags);
-
- was_empty = list_empty(&(priv->recv_msgs));
- list_add_tail(&(msg->link), &(priv->recv_msgs));
+ spin_lock_irqsave(&priv->recv_msg_lock, flags);
+ was_empty = list_empty(&priv->recv_msgs);
+ list_add_tail(&msg->link, &priv->recv_msgs);
+ spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
if (was_empty) {
wake_up_interruptible(&priv->wait);
kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN);
}
-
- spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
}
static __poll_t ipmi_poll(struct file *file, poll_table *wait)
@@ -68,7 +65,7 @@ static __poll_t ipmi_poll(struct file *file, poll_table *wait)
spin_lock_irqsave(&priv->recv_msg_lock, flags);
- if (!list_empty(&(priv->recv_msgs)))
+ if (!list_empty(&priv->recv_msgs))
mask |= (EPOLLIN | EPOLLRDNORM);
spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
@@ -79,13 +76,8 @@ static __poll_t ipmi_poll(struct file *file, poll_table *wait)
static int ipmi_fasync(int fd, struct file *file, int on)
{
struct ipmi_file_private *priv = file->private_data;
- int result;
- mutex_lock(&ipmi_mutex); /* could race against open() otherwise */
- result = fasync_helper(fd, file, on, &priv->fasync_queue);
- mutex_unlock(&ipmi_mutex);
-
- return (result);
+ return fasync_helper(fd, file, on, &priv->fasync_queue);
}
static const struct ipmi_user_hndl ipmi_hndlrs =
@@ -99,18 +91,16 @@ static int ipmi_open(struct inode *inode, struct file *file)
int rv;
struct ipmi_file_private *priv;
-
priv = kmalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
- mutex_lock(&ipmi_mutex);
priv->file = file;
rv = ipmi_create_user(if_num,
&ipmi_hndlrs,
priv,
- &(priv->user));
+ &priv->user);
if (rv) {
kfree(priv);
goto out;
@@ -118,8 +108,8 @@ static int ipmi_open(struct inode *inode, struct file *file)
file->private_data = priv;
- spin_lock_init(&(priv->recv_msg_lock));
- INIT_LIST_HEAD(&(priv->recv_msgs));
+ spin_lock_init(&priv->recv_msg_lock);
+ INIT_LIST_HEAD(&priv->recv_msgs);
init_waitqueue_head(&priv->wait);
priv->fasync_queue = NULL;
mutex_init(&priv->recv_mutex);
@@ -129,7 +119,6 @@ static int ipmi_open(struct inode *inode, struct file *file)
priv->default_retry_time_ms = 0;
out:
- mutex_unlock(&ipmi_mutex);
return rv;
}
@@ -137,7 +126,7 @@ static int ipmi_release(struct inode *inode, struct file *file)
{
struct ipmi_file_private *priv = file->private_data;
int rv;
- struct ipmi_recv_msg *msg, *next;
+ struct ipmi_recv_msg *msg, *next;
rv = ipmi_destroy_user(priv->user);
if (rv)
@@ -146,13 +135,12 @@ static int ipmi_release(struct inode *inode, struct file *file)
list_for_each_entry_safe(msg, next, &priv->recv_msgs, link)
ipmi_free_recv_msg(msg);
-
kfree(priv);
return 0;
}
-static int handle_send_req(ipmi_user_t user,
+static int handle_send_req(struct ipmi_user *user,
struct ipmi_req *req,
int retries,
unsigned int retry_time_ms)
@@ -189,8 +177,7 @@ static int handle_send_req(ipmi_user_t user,
if (copy_from_user(msg.data,
req->msg.data,
- req->msg.data_len))
- {
+ req->msg.data_len)) {
rv = -EFAULT;
goto out;
}
@@ -233,25 +220,24 @@ static int handle_recv(struct ipmi_file_private *priv,
mutex_lock(&priv->recv_mutex);
/* Grab the message off the list. */
- spin_lock_irqsave(&(priv->recv_msg_lock), flags);
+ spin_lock_irqsave(&priv->recv_msg_lock, flags);
if (list_empty(&(priv->recv_msgs))) {
- spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
+ spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
rv = -EAGAIN;
goto recv_err;
}
entry = priv->recv_msgs.next;
msg = list_entry(entry, struct ipmi_recv_msg, link);
list_del(entry);
- spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
+ spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
addr_len = ipmi_addr_length(msg->addr.addr_type);
- if (rsp->addr_len < addr_len)
- {
+ if (rsp->addr_len < addr_len) {
rv = -EINVAL;
goto recv_putback_on_err;
}
- if (copy_to_user(rsp->addr, &(msg->addr), addr_len)) {
+ if (copy_to_user(rsp->addr, &msg->addr, addr_len)) {
rv = -EFAULT;
goto recv_putback_on_err;
}
@@ -273,8 +259,7 @@ static int handle_recv(struct ipmi_file_private *priv,
if (copy_to_user(rsp->msg.data,
msg->msg.data,
- msg->msg.data_len))
- {
+ msg->msg.data_len)) {
rv = -EFAULT;
goto recv_putback_on_err;
}
@@ -294,9 +279,9 @@ static int handle_recv(struct ipmi_file_private *priv,
recv_putback_on_err:
/* If we got an error, put the message back onto
the head of the queue. */
- spin_lock_irqsave(&(priv->recv_msg_lock), flags);
- list_add(entry, &(priv->recv_msgs));
- spin_unlock_irqrestore(&(priv->recv_msg_lock), flags);
+ spin_lock_irqsave(&priv->recv_msg_lock, flags);
+ list_add(entry, &priv->recv_msgs);
+ spin_unlock_irqrestore(&priv->recv_msg_lock, flags);
recv_err:
mutex_unlock(&priv->recv_mutex);
return rv;
@@ -307,9 +292,9 @@ static int copyout_recv(struct ipmi_recv *rsp, void __user *to)
return copy_to_user(to, rsp, sizeof(struct ipmi_recv)) ? -EFAULT : 0;
}
-static int ipmi_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long data)
+static long ipmi_ioctl(struct file *file,
+ unsigned int cmd,
+ unsigned long data)
{
int rv = -EINVAL;
struct ipmi_file_private *priv = file->private_data;
@@ -320,16 +305,20 @@ static int ipmi_ioctl(struct file *file,
case IPMICTL_SEND_COMMAND:
{
struct ipmi_req req;
+ int retries;
+ unsigned int retry_time_ms;
if (copy_from_user(&req, arg, sizeof(req))) {
rv = -EFAULT;
break;
}
- rv = handle_send_req(priv->user,
- &req,
- priv->default_retries,
- priv->default_retry_time_ms);
+ mutex_lock(&priv->recv_mutex);
+ retries = priv->default_retries;
+ retry_time_ms = priv->default_retry_time_ms;
+ mutex_unlock(&priv->recv_mutex);
+
+ rv = handle_send_req(priv->user, &req, retries, retry_time_ms);
break;
}
@@ -569,8 +558,10 @@ static int ipmi_ioctl(struct file *file,
break;
}
+ mutex_lock(&priv->recv_mutex);
priv->default_retries = parms.retries;
priv->default_retry_time_ms = parms.retry_time_ms;
+ mutex_unlock(&priv->recv_mutex);
rv = 0;
break;
}
@@ -579,8 +570,10 @@ static int ipmi_ioctl(struct file *file,
{
struct ipmi_timing_parms parms;
+ mutex_lock(&priv->recv_mutex);
parms.retries = priv->default_retries;
parms.retry_time_ms = priv->default_retry_time_ms;
+ mutex_unlock(&priv->recv_mutex);
if (copy_to_user(arg, &parms, sizeof(parms))) {
rv = -EFAULT;
@@ -615,30 +608,16 @@ static int ipmi_ioctl(struct file *file,
rv = ipmi_set_maintenance_mode(priv->user, mode);
break;
}
+
+ default:
+ rv = -ENOTTY;
+ break;
}
return rv;
}
-/*
- * Note: it doesn't make sense to take the BKL here but
- * not in compat_ipmi_ioctl. -arnd
- */
-static long ipmi_unlocked_ioctl(struct file *file,
- unsigned int cmd,
- unsigned long data)
-{
- int ret;
-
- mutex_lock(&ipmi_mutex);
- ret = ipmi_ioctl(file, cmd, data);
- mutex_unlock(&ipmi_mutex);
-
- return ret;
-}
-
#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
@@ -749,15 +728,21 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
{
struct ipmi_req rp;
struct compat_ipmi_req r32;
+ int retries;
+ unsigned int retry_time_ms;
if (copy_from_user(&r32, compat_ptr(arg), sizeof(r32)))
return -EFAULT;
get_compat_ipmi_req(&rp, &r32);
+ mutex_lock(&priv->recv_mutex);
+ retries = priv->default_retries;
+ retry_time_ms = priv->default_retry_time_ms;
+ mutex_unlock(&priv->recv_mutex);
+
return handle_send_req(priv->user, &rp,
- priv->default_retries,
- priv->default_retry_time_ms);
+ retries, retry_time_ms);
}
case COMPAT_IPMICTL_SEND_COMMAND_SETTIME:
{
@@ -791,25 +776,13 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
return ipmi_ioctl(filep, cmd, arg);
}
}
-
-static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
- unsigned long arg)
-{
- int ret;
-
- mutex_lock(&ipmi_mutex);
- ret = compat_ipmi_ioctl(filep, cmd, arg);
- mutex_unlock(&ipmi_mutex);
-
- return ret;
-}
#endif
static const struct file_operations ipmi_fops = {
.owner = THIS_MODULE,
- .unlocked_ioctl = ipmi_unlocked_ioctl,
+ .unlocked_ioctl = ipmi_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = unlocked_compat_ipmi_ioctl,
+ .compat_ioctl = compat_ipmi_ioctl,
#endif
.open = ipmi_open,
.release = ipmi_release,
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