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linux/drivers/parport/procfs.c
Eric W. Biederman 25398a158d sysctl: parport remove binary paths 
The sysctl binary paths don't look as if they even code work, .data is not
filled in, and all of the proc_handlers look at extra1 and there is not
strategy routine.

So just kill the binary paths.

In addition this patch removes the setting of extra1 on directories.  It
doesn't look like the parport code ever examines it, and it's bad sysctl form.

[bunk@kernel.org: remove parport_device_num()]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-18 14:37:23 -07:00

618 lines
13 KiB
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/* Sysctl interface for parport devices.
*
* Authors: David Campbell
* Tim Waugh <tim@cyberelk.demon.co.uk>
* Philip Blundell <philb@gnu.org>
* Andrea Arcangeli
* Riccardo Facchetti <fizban@tin.it>
*
* based on work by Grant Guenther <grant@torque.net>
* and Philip Blundell
*
* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
*/
#include <linux/string.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/parport.h>
#include <linux/ctype.h>
#include <linux/sysctl.h>
#include <asm/uaccess.h>
#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
#define PARPORT_MIN_TIMESLICE_VALUE 1ul
#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
#define PARPORT_MIN_SPINTIME_VALUE 1
#define PARPORT_MAX_SPINTIME_VALUE 1000
static int do_active_device(ctl_table *table, int write, struct file *filp,
void __user *result, size_t *lenp, loff_t *ppos)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[256];
struct pardevice *dev;
int len = 0;
if (write) /* can't happen anyway */
return -EACCES;
if (*ppos) {
*lenp = 0;
return 0;
}
for (dev = port->devices; dev ; dev = dev->next) {
if(dev == port->cad) {
len += sprintf(buffer, "%s\n", dev->name);
}
}
if(!len) {
len += sprintf(buffer, "%s\n", "none");
}
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
#ifdef CONFIG_PARPORT_1284
static int do_autoprobe(ctl_table *table, int write, struct file *filp,
void __user *result, size_t *lenp, loff_t *ppos)
{
struct parport_device_info *info = table->extra2;
const char *str;
char buffer[256];
int len = 0;
if (write) /* permissions stop this */
return -EACCES;
if (*ppos) {
*lenp = 0;
return 0;
}
if ((str = info->class_name) != NULL)
len += sprintf (buffer + len, "CLASS:%s;\n", str);
if ((str = info->model) != NULL)
len += sprintf (buffer + len, "MODEL:%s;\n", str);
if ((str = info->mfr) != NULL)
len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
if ((str = info->description) != NULL)
len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
if ((str = info->cmdset) != NULL)
len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user (result, buffer, len) ? -EFAULT : 0;
}
#endif /* IEEE1284.3 support. */
static int do_hardware_base_addr (ctl_table *table, int write,
struct file *filp, void __user *result,
size_t *lenp, loff_t *ppos)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (*ppos) {
*lenp = 0;
return 0;
}
if (write) /* permissions prevent this anyway */
return -EACCES;
len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_irq (ctl_table *table, int write,
struct file *filp, void __user *result,
size_t *lenp, loff_t *ppos)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (*ppos) {
*lenp = 0;
return 0;
}
if (write) /* permissions prevent this anyway */
return -EACCES;
len += sprintf (buffer, "%d\n", port->irq);
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_dma (ctl_table *table, int write,
struct file *filp, void __user *result,
size_t *lenp, loff_t *ppos)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (*ppos) {
*lenp = 0;
return 0;
}
if (write) /* permissions prevent this anyway */
return -EACCES;
len += sprintf (buffer, "%d\n", port->dma);
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_modes (ctl_table *table, int write,
struct file *filp, void __user *result,
size_t *lenp, loff_t *ppos)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[40];
int len = 0;
if (*ppos) {
*lenp = 0;
return 0;
}
if (write) /* permissions prevent this anyway */
return -EACCES;
{
#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
int f = 0;
printmode(PCSPP);
printmode(TRISTATE);
printmode(COMPAT);
printmode(EPP);
printmode(ECP);
printmode(DMA);
#undef printmode
}
buffer[len++] = '\n';
if (len > *lenp)
len = *lenp;
else
*lenp = len;
*ppos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
#define PARPORT_PORT_DIR(CHILD) { .ctl_name = 0, .procname = NULL, .mode = 0555, .child = CHILD }
#define PARPORT_PARPORT_DIR(CHILD) { .ctl_name = DEV_PARPORT, .procname = "parport", \
.mode = 0555, .child = CHILD }
#define PARPORT_DEV_DIR(CHILD) { .ctl_name = CTL_DEV, .procname = "dev", .mode = 0555, .child = CHILD }
#define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \
.mode = 0555, .child = NULL }
static const unsigned long parport_min_timeslice_value =
PARPORT_MIN_TIMESLICE_VALUE;
static const unsigned long parport_max_timeslice_value =
PARPORT_MAX_TIMESLICE_VALUE;
static const int parport_min_spintime_value =
PARPORT_MIN_SPINTIME_VALUE;
static const int parport_max_spintime_value =
PARPORT_MAX_SPINTIME_VALUE;
struct parport_sysctl_table {
struct ctl_table_header *sysctl_header;
ctl_table vars[12];
ctl_table device_dir[2];
ctl_table port_dir[2];
ctl_table parport_dir[2];
ctl_table dev_dir[2];
};
static const struct parport_sysctl_table parport_sysctl_template = {
.sysctl_header = NULL,
{
{
.procname = "spintime",
.data = NULL,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.extra1 = (void*) &parport_min_spintime_value,
.extra2 = (void*) &parport_max_spintime_value
},
{
.procname = "base-addr",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_hardware_base_addr
},
{
.procname = "irq",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_hardware_irq
},
{
.procname = "dma",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_hardware_dma
},
{
.procname = "modes",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_hardware_modes
},
PARPORT_DEVICES_ROOT_DIR,
#ifdef CONFIG_PARPORT_1284
{
.procname = "autoprobe",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_autoprobe
},
{
.procname = "autoprobe0",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_autoprobe
},
{
.procname = "autoprobe1",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_autoprobe
},
{
.procname = "autoprobe2",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_autoprobe
},
{
.procname = "autoprobe3",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_autoprobe
},
#endif /* IEEE 1284 support */
{}
},
{
{
.procname = "active",
.data = NULL,
.maxlen = 0,
.mode = 0444,
.proc_handler = &do_active_device
},
{}
},
{
PARPORT_PORT_DIR(NULL),
{}
},
{
PARPORT_PARPORT_DIR(NULL),
{}
},
{
PARPORT_DEV_DIR(NULL),
{}
}
};
struct parport_device_sysctl_table
{
struct ctl_table_header *sysctl_header;
ctl_table vars[2];
ctl_table device_dir[2];
ctl_table devices_root_dir[2];
ctl_table port_dir[2];
ctl_table parport_dir[2];
ctl_table dev_dir[2];
};
static const struct parport_device_sysctl_table
parport_device_sysctl_template = {
.sysctl_header = NULL,
{
{
.procname = "timeslice",
.data = NULL,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
.extra1 = (void*) &parport_min_timeslice_value,
.extra2 = (void*) &parport_max_timeslice_value
},
},
{
{
.ctl_name = 0,
.procname = NULL,
.data = NULL,
.maxlen = 0,
.mode = 0555,
.child = NULL
},
{}
},
{
PARPORT_DEVICES_ROOT_DIR,
{}
},
{
PARPORT_PORT_DIR(NULL),
{}
},
{
PARPORT_PARPORT_DIR(NULL),
{}
},
{
PARPORT_DEV_DIR(NULL),
{}
}
};
struct parport_default_sysctl_table
{
struct ctl_table_header *sysctl_header;
ctl_table vars[3];
ctl_table default_dir[2];
ctl_table parport_dir[2];
ctl_table dev_dir[2];
};
extern unsigned long parport_default_timeslice;
extern int parport_default_spintime;
static struct parport_default_sysctl_table
parport_default_sysctl_table = {
.sysctl_header = NULL,
{
{
.procname = "timeslice",
.data = &parport_default_timeslice,
.maxlen = sizeof(parport_default_timeslice),
.mode = 0644,
.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
.extra1 = (void*) &parport_min_timeslice_value,
.extra2 = (void*) &parport_max_timeslice_value
},
{
.procname = "spintime",
.data = &parport_default_spintime,
.maxlen = sizeof(parport_default_spintime),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.extra1 = (void*) &parport_min_spintime_value,
.extra2 = (void*) &parport_max_spintime_value
},
{}
},
{
{
.ctl_name = DEV_PARPORT_DEFAULT,
.procname = "default",
.mode = 0555,
.child = parport_default_sysctl_table.vars
},
{}
},
{
PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
{}
},
{
PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
{}
}
};
int parport_proc_register(struct parport *port)
{
struct parport_sysctl_table *t;
int i;
t = kmalloc(sizeof(*t), GFP_KERNEL);
if (t == NULL)
return -ENOMEM;
memcpy(t, &parport_sysctl_template, sizeof(*t));
t->device_dir[0].extra1 = port;
for (i = 0; i < 5; i++)
t->vars[i].extra1 = port;
t->vars[0].data = &port->spintime;
t->vars[5].child = t->device_dir;
for (i = 0; i < 5; i++)
t->vars[6 + i].extra2 = &port->probe_info[i];
t->port_dir[0].procname = port->name;
t->port_dir[0].ctl_name = 0;
t->port_dir[0].child = t->vars;
t->parport_dir[0].child = t->port_dir;
t->dev_dir[0].child = t->parport_dir;
t->sysctl_header = register_sysctl_table(t->dev_dir);
if (t->sysctl_header == NULL) {
kfree(t);
t = NULL;
}
port->sysctl_table = t;
return 0;
}
int parport_proc_unregister(struct parport *port)
{
if (port->sysctl_table) {
struct parport_sysctl_table *t = port->sysctl_table;
port->sysctl_table = NULL;
unregister_sysctl_table(t->sysctl_header);
kfree(t);
}
return 0;
}
int parport_device_proc_register(struct pardevice *device)
{
struct parport_device_sysctl_table *t;
struct parport * port = device->port;
t = kmalloc(sizeof(*t), GFP_KERNEL);
if (t == NULL)
return -ENOMEM;
memcpy(t, &parport_device_sysctl_template, sizeof(*t));
t->dev_dir[0].child = t->parport_dir;
t->parport_dir[0].child = t->port_dir;
t->port_dir[0].procname = port->name;
t->port_dir[0].ctl_name = 0;
t->port_dir[0].child = t->devices_root_dir;
t->devices_root_dir[0].child = t->device_dir;
t->device_dir[0].ctl_name = 0;
t->device_dir[0].procname = device->name;
t->device_dir[0].child = t->vars;
t->vars[0].data = &device->timeslice;
t->sysctl_header = register_sysctl_table(t->dev_dir);
if (t->sysctl_header == NULL) {
kfree(t);
t = NULL;
}
device->sysctl_table = t;
return 0;
}
int parport_device_proc_unregister(struct pardevice *device)
{
if (device->sysctl_table) {
struct parport_device_sysctl_table *t = device->sysctl_table;
device->sysctl_table = NULL;
unregister_sysctl_table(t->sysctl_header);
kfree(t);
}
return 0;
}
static int __init parport_default_proc_register(void)
{
parport_default_sysctl_table.sysctl_header =
register_sysctl_table(parport_default_sysctl_table.dev_dir);
return 0;
}
static void __exit parport_default_proc_unregister(void)
{
if (parport_default_sysctl_table.sysctl_header) {
unregister_sysctl_table(parport_default_sysctl_table.
sysctl_header);
parport_default_sysctl_table.sysctl_header = NULL;
}
}
#else /* no sysctl or no procfs*/
int parport_proc_register(struct parport *pp)
{
return 0;
}
int parport_proc_unregister(struct parport *pp)
{
return 0;
}
int parport_device_proc_register(struct pardevice *device)
{
return 0;
}
int parport_device_proc_unregister(struct pardevice *device)
{
return 0;
}
static int __init parport_default_proc_register (void)
{
return 0;
}
static void __exit parport_default_proc_unregister (void)
{
}
#endif
module_init(parport_default_proc_register)
module_exit(parport_default_proc_unregister)
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