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Commit 29d56cfe authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
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[PATCH] uml: hot-unplug code cleanup 



Clean up the hot-unplugging code.  There is now an id procedure which is
called to figure out what device we're talking to.  The error messages from
that are now done from mconsole_remove instead of the driver.  remove is now
called with the device number, after it has been checked, so doesn't need to
do sanity checking on it.

Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent fc47a0d1

arch/um/drivers/line.c

+17 −2
Original line number Diff line number Diff line
@@ -602,11 +602,26 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str, 
	return n;

}



int line_remove(struct line *lines, unsigned int num, char *str)

int line_id(char **str, int *start_out, int *end_out)

{

	char *end;

        int n;



	n = simple_strtoul(*str, &end, 0);

	if((*end != '\0') || (end == *str))

                return -1;



        *str = end;

        *start_out = n;

        *end_out = n;

        return n;

}



int line_remove(struct line *lines, unsigned int num, int n)

{

	char config[sizeof("conxxxx=none\0")];



	sprintf(config, "%s=none", str);

	sprintf(config, "%d=none", n);

	return !line_setup(lines, num, config, 0);

}

arch/um/drivers/mconsole_kern.c

+32 −4
Original line number Diff line number Diff line
@@ -419,8 +419,9 @@ void mconsole_config(struct mc_request *req) 
void mconsole_remove(struct mc_request *req)

{

	struct mc_device *dev;	

	char *ptr = req->request.data;

	int err;

	char *ptr = req->request.data, *err_msg = "";

        char error[256];

	int err, start, end, n;



	ptr += strlen("remove");

	while(isspace(*ptr)) ptr++;
@@ -429,8 +430,35 @@ void mconsole_remove(struct mc_request *req) 
		mconsole_reply(req, "Bad remove option", 1, 0);

		return;

	}

	err = (*dev->remove)(&ptr[strlen(dev->name)]);

	mconsole_reply(req, "", err, 0);



        ptr = &ptr[strlen(dev->name)];



        err = 1;

        n = (*dev->id)(&ptr, &start, &end);

        if(n < 0){

                err_msg = "Couldn't parse device number";

                goto out;

        }

        else if((n < start) || (n > end)){

                sprintf(error, "Invalid device number - must be between "

                        "%d and %d", start, end);

                err_msg = error;

                goto out;

        }



	err = (*dev->remove)(n);

        switch(err){

        case -ENODEV:

                err_msg = "Device doesn't exist";

                break;

        case -EBUSY:

                err_msg = "Device is currently open";

                break;

        default:

                break;

        }

 out:

	mconsole_reply(req, err_msg, err, 0);

}



#ifdef CONFIG_MAGIC_SYSRQ

arch/um/drivers/net_kern.c

+21 −10
Original line number Diff line number Diff line
@@ -612,25 +612,35 @@ static int net_config(char *str) 
	return(err);

}



static int net_remove(char *str)

static int net_id(char **str, int *start_out, int *end_out)

{

	struct uml_net *device;

	struct net_device *dev;

	struct uml_net_private *lp;

        char *end;

        int n;



	n = simple_strtoul(str, &end, 0);

	if((*end != '\0') || (end == str))

		return(-1);

	n = simple_strtoul(*str, &end, 0);

	if((*end != '\0') || (end == *str))

		return -1;



        *start_out = n;

        *end_out = n;

        *str = end;

        return n;

}



static int net_remove(int n)

{

	struct uml_net *device;

	struct net_device *dev;

	struct uml_net_private *lp;



	device = find_device(n);

	if(device == NULL)

		return(0);

		return -ENODEV;



	dev = device->dev;

	lp = dev->priv;

	if(lp->fd > 0) return(-1);

	if(lp->fd > 0)

                return -EBUSY;

	if(lp->remove != NULL) (*lp->remove)(&lp->user);

	unregister_netdev(dev);

	platform_device_unregister(&device->pdev);
@@ -638,13 +648,14 @@ static int net_remove(char *str) 
	list_del(&device->list);

	kfree(device);

	free_netdev(dev);

	return(0);

	return 0;

}



static struct mc_device net_mc = {

	.name		= "eth",

	.config		= net_config,

	.get_config	= NULL,

        .id		= net_id,

	.remove		= net_remove,

};

arch/um/drivers/ssl.c

+5 −4
Original line number Diff line number Diff line
@@ -49,7 +49,7 @@ static struct chan_opts opts = { 


static int ssl_config(char *str);

static int ssl_get_config(char *dev, char *str, int size, char **error_out);

static int ssl_remove(char *str);

static int ssl_remove(int n);



static struct line_driver driver = {

	.name 			= "UML serial line",
@@ -69,6 +69,7 @@ static struct line_driver driver = { 
		.name  		= "ssl",

		.config 	= ssl_config,

		.get_config 	= ssl_get_config,

                .id		= line_id,

		.remove 	= ssl_remove,

	},

};
@@ -94,10 +95,10 @@ static int ssl_get_config(char *dev, char *str, int size, char **error_out) 
			       str, size, error_out));

}



static int ssl_remove(char *str)

static int ssl_remove(int n)

{

	return(line_remove(serial_lines, 

			   sizeof(serial_lines)/sizeof(serial_lines[0]), str));

        return line_remove(serial_lines,

                           sizeof(serial_lines)/sizeof(serial_lines[0]), n);

}



int ssl_open(struct tty_struct *tty, struct file *filp)

arch/um/drivers/stdio_console.c

+4 −3
Original line number Diff line number Diff line
@@ -55,7 +55,7 @@ static struct chan_opts opts = { 


static int con_config(char *str);

static int con_get_config(char *dev, char *str, int size, char **error_out);

static int con_remove(char *str);

static int con_remove(int n);



static struct line_driver driver = {

	.name 			= "UML console",
@@ -75,6 +75,7 @@ static struct line_driver driver = { 
		.name  		= "con",

		.config 	= con_config,

		.get_config 	= con_get_config,

                .id		= line_id,

		.remove 	= con_remove,

	},

};
@@ -99,9 +100,9 @@ static int con_get_config(char *dev, char *str, int size, char **error_out) 
			       size, error_out));

}



static int con_remove(char *str)

static int con_remove(int n)

{

	return(line_remove(vts, sizeof(vts)/sizeof(vts[0]), str));

        return line_remove(vts, sizeof(vts)/sizeof(vts[0]), n);

}



static int con_open(struct tty_struct *tty, struct file *filp)