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path: root/drivers/isdn/divert/divert_procfs.c
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Diffstat (limited to 'drivers/isdn/divert/divert_procfs.c')
-rw-r--r--drivers/isdn/divert/divert_procfs.c174
1 files changed, 97 insertions, 77 deletions
diff --git a/drivers/isdn/divert/divert_procfs.c b/drivers/isdn/divert/divert_procfs.c
index 8b256a617c8..1c5dc345e7c 100644
--- a/drivers/isdn/divert/divert_procfs.c
+++ b/drivers/isdn/divert/divert_procfs.c
@@ -11,13 +11,16 @@
#include <linux/module.h>
#include <linux/poll.h>
+#include <linux/slab.h>
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#else
#include <linux/fs.h>
#endif
+#include <linux/sched.h>
#include <linux/isdnif.h>
#include <net/net_namespace.h>
+#include <linux/mutex.h>
#include "isdn_divert.h"
@@ -25,6 +28,7 @@
/* Variables for interface queue */
/*********************************/
ulong if_used = 0; /* number of interface users */
+static DEFINE_MUTEX(isdn_divert_mutex);
static struct divert_info *divert_info_head = NULL; /* head of queue */
static struct divert_info *divert_info_tail = NULL; /* pointer to last entry */
static DEFINE_SPINLOCK(divert_info_lock);/* lock for queue */
@@ -46,10 +50,10 @@ put_info_buffer(char *cp)
if (!*cp)
return;
if (!(ib = kmalloc(sizeof(struct divert_info) + strlen(cp), GFP_ATOMIC)))
- return; /* no memory */
+ return; /* no memory */
strcpy(ib->info_start, cp); /* set output string */
ib->next = NULL;
- spin_lock_irqsave( &divert_info_lock, flags );
+ spin_lock_irqsave(&divert_info_lock, flags);
ib->usage_cnt = if_used;
if (!divert_info_head)
divert_info_head = ib; /* new head */
@@ -67,7 +71,7 @@ put_info_buffer(char *cp)
} else
break;
} /* divert_info_head->next */
- spin_unlock_irqrestore( &divert_info_lock, flags );
+ spin_unlock_irqrestore(&divert_info_lock, flags);
wake_up_interruptible(&(rd_queue));
} /* put_info_buffer */
@@ -77,17 +81,18 @@ put_info_buffer(char *cp)
/* deflection device read routine */
/**********************************/
static ssize_t
-isdn_divert_read(struct file *file, char __user *buf, size_t count, loff_t * off)
+isdn_divert_read(struct file *file, char __user *buf, size_t count, loff_t *off)
{
struct divert_info *inf;
int len;
- if (!*((struct divert_info **) file->private_data)) {
+ if (!(inf = *((struct divert_info **) file->private_data))) {
if (file->f_flags & O_NONBLOCK)
return -EAGAIN;
- interruptible_sleep_on(&(rd_queue));
+ wait_event_interruptible(rd_queue, (inf =
+ *((struct divert_info **) file->private_data)));
}
- if (!(inf = *((struct divert_info **) file->private_data)))
+ if (!inf)
return (0);
inf->usage_cnt--; /* new usage count */
@@ -105,7 +110,7 @@ isdn_divert_read(struct file *file, char __user *buf, size_t count, loff_t * off
/* deflection device write routine */
/**********************************/
static ssize_t
-isdn_divert_write(struct file *file, const char __user *buf, size_t count, loff_t * off)
+isdn_divert_write(struct file *file, const char __user *buf, size_t count, loff_t *off)
{
return (-ENODEV);
} /* isdn_divert_write */
@@ -115,7 +120,7 @@ isdn_divert_write(struct file *file, const char __user *buf, size_t count, loff_
/* select routines for various kernels */
/***************************************/
static unsigned int
-isdn_divert_poll(struct file *file, poll_table * wait)
+isdn_divert_poll(struct file *file, poll_table *wait)
{
unsigned int mask = 0;
@@ -135,13 +140,13 @@ isdn_divert_open(struct inode *ino, struct file *filep)
{
unsigned long flags;
- spin_lock_irqsave( &divert_info_lock, flags );
- if_used++;
+ spin_lock_irqsave(&divert_info_lock, flags);
+ if_used++;
if (divert_info_head)
filep->private_data = &(divert_info_tail->next);
else
filep->private_data = &divert_info_head;
- spin_unlock_irqrestore( &divert_info_lock, flags );
+ spin_unlock_irqrestore(&divert_info_lock, flags);
/* start_divert(); */
return nonseekable_open(ino, filep);
} /* isdn_divert_open */
@@ -155,7 +160,7 @@ isdn_divert_close(struct inode *ino, struct file *filep)
struct divert_info *inf;
unsigned long flags;
- spin_lock_irqsave( &divert_info_lock, flags );
+ spin_lock_irqsave(&divert_info_lock, flags);
if_used--;
inf = *((struct divert_info **) filep->private_data);
while (inf) {
@@ -168,16 +173,14 @@ isdn_divert_close(struct inode *ino, struct file *filep)
divert_info_head = divert_info_head->next;
kfree(inf);
}
- spin_unlock_irqrestore( &divert_info_lock, flags );
+ spin_unlock_irqrestore(&divert_info_lock, flags);
return (0);
} /* isdn_divert_close */
/*********/
/* IOCTL */
/*********/
-static int
-isdn_divert_ioctl(struct inode *inode, struct file *file,
- uint cmd, ulong arg)
+static int isdn_divert_ioctl_unlocked(struct file *file, uint cmd, ulong arg)
{
divert_ioctl dioctl;
int i;
@@ -189,73 +192,90 @@ isdn_divert_ioctl(struct inode *inode, struct file *file,
return -EFAULT;
switch (cmd) {
- case IIOCGETVER:
- dioctl.drv_version = DIVERT_IIOC_VERSION; /* set version */
- break;
-
- case IIOCGETDRV:
- if ((dioctl.getid.drvid = divert_if.name_to_drv(dioctl.getid.drvnam)) < 0)
- return (-EINVAL);
- break;
-
- case IIOCGETNAM:
- cp = divert_if.drv_to_name(dioctl.getid.drvid);
- if (!cp)
- return (-EINVAL);
- if (!*cp)
- return (-EINVAL);
- strcpy(dioctl.getid.drvnam, cp);
- break;
+ case IIOCGETVER:
+ dioctl.drv_version = DIVERT_IIOC_VERSION; /* set version */
+ break;
- case IIOCGETRULE:
- if (!(rulep = getruleptr(dioctl.getsetrule.ruleidx)))
- return (-EINVAL);
- dioctl.getsetrule.rule = *rulep; /* copy data */
- break;
-
- case IIOCMODRULE:
- if (!(rulep = getruleptr(dioctl.getsetrule.ruleidx)))
- return (-EINVAL);
- spin_lock_irqsave(&divert_lock, flags);
- *rulep = dioctl.getsetrule.rule; /* copy data */
- spin_unlock_irqrestore(&divert_lock, flags);
- return (0); /* no copy required */
- break;
-
- case IIOCINSRULE:
- return (insertrule(dioctl.getsetrule.ruleidx, &dioctl.getsetrule.rule));
- break;
+ case IIOCGETDRV:
+ if ((dioctl.getid.drvid = divert_if.name_to_drv(dioctl.getid.drvnam)) < 0)
+ return (-EINVAL);
+ break;
- case IIOCDELRULE:
- return (deleterule(dioctl.getsetrule.ruleidx));
- break;
+ case IIOCGETNAM:
+ cp = divert_if.drv_to_name(dioctl.getid.drvid);
+ if (!cp)
+ return (-EINVAL);
+ if (!*cp)
+ return (-EINVAL);
+ strcpy(dioctl.getid.drvnam, cp);
+ break;
- case IIOCDODFACT:
- return (deflect_extern_action(dioctl.fwd_ctrl.subcmd,
- dioctl.fwd_ctrl.callid,
- dioctl.fwd_ctrl.to_nr));
-
- case IIOCDOCFACT:
- case IIOCDOCFDIS:
- case IIOCDOCFINT:
- if (!divert_if.drv_to_name(dioctl.cf_ctrl.drvid))
- return (-EINVAL); /* invalid driver */
- if ((i = cf_command(dioctl.cf_ctrl.drvid,
- (cmd == IIOCDOCFACT) ? 1 : (cmd == IIOCDOCFDIS) ? 0 : 2,
- dioctl.cf_ctrl.cfproc,
- dioctl.cf_ctrl.msn,
- dioctl.cf_ctrl.service,
- dioctl.cf_ctrl.fwd_nr,
- &dioctl.cf_ctrl.procid)))
- return (i);
- break;
+ case IIOCGETRULE:
+ if (!(rulep = getruleptr(dioctl.getsetrule.ruleidx)))
+ return (-EINVAL);
+ dioctl.getsetrule.rule = *rulep; /* copy data */
+ break;
- default:
+ case IIOCMODRULE:
+ if (!(rulep = getruleptr(dioctl.getsetrule.ruleidx)))
return (-EINVAL);
+ spin_lock_irqsave(&divert_lock, flags);
+ *rulep = dioctl.getsetrule.rule; /* copy data */
+ spin_unlock_irqrestore(&divert_lock, flags);
+ return (0); /* no copy required */
+ break;
+
+ case IIOCINSRULE:
+ return (insertrule(dioctl.getsetrule.ruleidx, &dioctl.getsetrule.rule));
+ break;
+
+ case IIOCDELRULE:
+ return (deleterule(dioctl.getsetrule.ruleidx));
+ break;
+
+ case IIOCDODFACT:
+ return (deflect_extern_action(dioctl.fwd_ctrl.subcmd,
+ dioctl.fwd_ctrl.callid,
+ dioctl.fwd_ctrl.to_nr));
+
+ case IIOCDOCFACT:
+ case IIOCDOCFDIS:
+ case IIOCDOCFINT:
+ if (!divert_if.drv_to_name(dioctl.cf_ctrl.drvid))
+ return (-EINVAL); /* invalid driver */
+ if (strnlen(dioctl.cf_ctrl.msn, sizeof(dioctl.cf_ctrl.msn)) ==
+ sizeof(dioctl.cf_ctrl.msn))
+ return -EINVAL;
+ if (strnlen(dioctl.cf_ctrl.fwd_nr, sizeof(dioctl.cf_ctrl.fwd_nr)) ==
+ sizeof(dioctl.cf_ctrl.fwd_nr))
+ return -EINVAL;
+ if ((i = cf_command(dioctl.cf_ctrl.drvid,
+ (cmd == IIOCDOCFACT) ? 1 : (cmd == IIOCDOCFDIS) ? 0 : 2,
+ dioctl.cf_ctrl.cfproc,
+ dioctl.cf_ctrl.msn,
+ dioctl.cf_ctrl.service,
+ dioctl.cf_ctrl.fwd_nr,
+ &dioctl.cf_ctrl.procid)))
+ return (i);
+ break;
+
+ default:
+ return (-EINVAL);
} /* switch cmd */
return copy_to_user((void __user *)arg, &dioctl, sizeof(dioctl)) ? -EFAULT : 0;
} /* isdn_divert_ioctl */
+static long isdn_divert_ioctl(struct file *file, uint cmd, ulong arg)
+{
+ long ret;
+
+ mutex_lock(&isdn_divert_mutex);
+ ret = isdn_divert_ioctl_unlocked(file, cmd, arg);
+ mutex_unlock(&isdn_divert_mutex);
+
+ return ret;
+}
+
static const struct file_operations isdn_fops =
{
.owner = THIS_MODULE,
@@ -263,9 +283,9 @@ static const struct file_operations isdn_fops =
.read = isdn_divert_read,
.write = isdn_divert_write,
.poll = isdn_divert_poll,
- .ioctl = isdn_divert_ioctl,
+ .unlocked_ioctl = isdn_divert_ioctl,
.open = isdn_divert_open,
- .release = isdn_divert_close,
+ .release = isdn_divert_close,
};
/****************************/
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 21:05:24 +0000