Commit 8c2348e3 authored by Al Viro's avatar Al Viro
Browse files

atm: separate ATM_GETNAMES handling from the rest of atm_dev_ioctl() 



atm_dev_ioctl() does copyin in two different ways - one for
ATM_GETNAMES, another for everything else.  Start with separating
the former into a new helper (atm_getnames()).  The next step
will be to lift the copyin into the callers.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 38c53ca3

net/atm/ioctl.c

+5 −1
Original line number Diff line number Diff line
@@ -162,7 +162,11 @@ static int do_vcc_ioctl(struct socket *sock, unsigned int cmd, 
	if (error != -ENOIOCTLCMD)

		goto done;



	if (cmd == ATM_GETNAMES) {

		error = atm_getnames(argp, compat);

	} else {

		error = atm_dev_ioctl(cmd, argp, compat);

	}



done:

	return error;

net/atm/resources.c

+45 −43
Original line number Diff line number Diff line
@@ -193,18 +193,15 @@ static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, 
	return error ? -EFAULT : 0;

}



int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat)

int atm_getnames(void __user *arg, int compat)

{

	void __user *buf;

	int error, len, number, size = 0;

	int error, len, size = 0;

	struct atm_dev *dev;

	struct list_head *p;

	int *tmp_buf, *tmp_p;

	int __user *sioc_len;

	int __user *iobuf_len;



	switch (cmd) {

	case ATM_GETNAMES:

	if (IS_ENABLED(CONFIG_COMPAT) && compat) {

#ifdef CONFIG_COMPAT

		struct compat_atm_iobuf __user *ciobuf = arg;
@@ -245,10 +242,15 @@ int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat) 
		? -EFAULT : 0;

	kfree(tmp_buf);

	return error;

	default:

		break;

}



int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat)

{

	void __user *buf;

	int error, len, number, size = 0;

	struct atm_dev *dev;

	int __user *sioc_len;



	if (IS_ENABLED(CONFIG_COMPAT) && compat) {

#ifdef CONFIG_COMPAT

		struct compat_atmif_sioc __user *csioc = arg;

net/atm/resources.h

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
extern struct list_head atm_devs;

extern struct mutex atm_dev_mutex;



int atm_getnames(void __user *arg, int compat);

int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat);

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