From e636c8d336489bf3eed5878299e6cc045bbad077 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:17:29 +0000
Subject: [PATCH] debug lk
---
kernel/drivers/isdn/capi/capi.c | 54 +++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 45 insertions(+), 9 deletions(-)
diff --git a/kernel/drivers/isdn/capi/capi.c b/kernel/drivers/isdn/capi/capi.c
index c67fd2f..85767f5 100644
--- a/kernel/drivers/isdn/capi/capi.c
+++ b/kernel/drivers/isdn/capi/capi.c
@@ -39,7 +39,9 @@
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capicmd.h>
-MODULE_DESCRIPTION("CAPI4Linux: Userspace /dev/capi20 interface");
+#include "kcapi.h"
+
+MODULE_DESCRIPTION("CAPI4Linux: kernel CAPI layer and /dev/capi20 interface");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");
@@ -950,6 +952,34 @@
return ret;
}
+#ifdef CONFIG_COMPAT
+static long
+capi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int ret;
+
+ if (cmd == CAPI_MANUFACTURER_CMD) {
+ struct {
+ compat_ulong_t cmd;
+ compat_uptr_t data;
+ } mcmd32;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&mcmd32, compat_ptr(arg), sizeof(mcmd32)))
+ return -EFAULT;
+
+ mutex_lock(&capi_mutex);
+ ret = capi20_manufacturer(mcmd32.cmd, compat_ptr(mcmd32.data));
+ mutex_unlock(&capi_mutex);
+
+ return ret;
+ }
+
+ return capi_unlocked_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
static int capi_open(struct inode *inode, struct file *file)
{
struct capidev *cdev;
@@ -968,7 +998,7 @@
list_add_tail(&cdev->list, &capidev_list);
mutex_unlock(&capidev_list_lock);
- return nonseekable_open(inode, file);
+ return stream_open(inode, file);
}
static int capi_release(struct inode *inode, struct file *file)
@@ -996,6 +1026,9 @@
.write = capi_write,
.poll = capi_poll,
.unlocked_ioctl = capi_unlocked_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = capi_compat_ioctl,
+#endif
.open = capi_open,
.release = capi_release,
};
@@ -1163,12 +1196,6 @@
return mp->outbytes;
}
-static int capinc_tty_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- return -ENOIOCTLCMD;
-}
-
static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
{
pr_debug("capinc_tty_set_termios\n");
@@ -1244,7 +1271,6 @@
.flush_chars = capinc_tty_flush_chars,
.write_room = capinc_tty_write_room,
.chars_in_buffer = capinc_tty_chars_in_buffer,
- .ioctl = capinc_tty_ioctl,
.set_termios = capinc_tty_set_termios,
.throttle = capinc_tty_throttle,
.unthrottle = capinc_tty_unthrottle,
@@ -1388,15 +1414,22 @@
{
const char *compileinfo;
int major_ret;
+ int ret;
+
+ ret = kcapi_init();
+ if (ret)
+ return ret;
major_ret = register_chrdev(capi_major, "capi20", &capi_fops);
if (major_ret < 0) {
printk(KERN_ERR "capi20: unable to get major %d\n", capi_major);
+ kcapi_exit();
return major_ret;
}
capi_class = class_create(THIS_MODULE, "capi");
if (IS_ERR(capi_class)) {
unregister_chrdev(capi_major, "capi20");
+ kcapi_exit();
return PTR_ERR(capi_class);
}
@@ -1406,6 +1439,7 @@
device_destroy(capi_class, MKDEV(capi_major, 0));
class_destroy(capi_class);
unregister_chrdev(capi_major, "capi20");
+ kcapi_exit();
return -ENOMEM;
}
@@ -1431,6 +1465,8 @@
unregister_chrdev(capi_major, "capi20");
capinc_tty_exit();
+
+ kcapi_exit();
}
module_init(capi_init);
--
Gitblit v1.6.2