mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
78eb4ea25c
const qualify the struct ctl_table argument in the proc_handler function
signatures. This is a prerequisite to moving the static ctl_table
structs into .rodata data which will ensure that proc_handler function
pointers cannot be modified.
This patch has been generated by the following coccinelle script:
```
virtual patch
@r1@
identifier ctl, write, buffer, lenp, ppos;
identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)";
@@
int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int write, void *buffer, size_t *lenp, loff_t *ppos);
@r2@
identifier func, ctl, write, buffer, lenp, ppos;
@@
int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int write, void *buffer, size_t *lenp, loff_t *ppos)
{ ... }
@r3@
identifier func;
@@
int func(
- struct ctl_table *
+ const struct ctl_table *
,int , void *, size_t *, loff_t *);
@r4@
identifier func, ctl;
@@
int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int , void *, size_t *, loff_t *);
@r5@
identifier func, write, buffer, lenp, ppos;
@@
int func(
- struct ctl_table *
+ const struct ctl_table *
,int write, void *buffer, size_t *lenp, loff_t *ppos);
```
* Code formatting was adjusted in xfs_sysctl.c to comply with code
conventions. The xfs_stats_clear_proc_handler,
xfs_panic_mask_proc_handler and xfs_deprecated_dointvec_minmax where
adjusted.
* The ctl_table argument in proc_watchdog_common was const qualified.
This is called from a proc_handler itself and is calling back into
another proc_handler, making it necessary to change it as part of the
proc_handler migration.
Co-developed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Co-developed-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Joel Granados <j.granados@samsung.com>
598 lines
12 KiB
C
598 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* 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 <linux/device.h>
|
|
|
|
#include <linux/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(const struct ctl_table *table, int write,
|
|
void *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 += snprintf(buffer, sizeof(buffer), "%s\n", dev->name);
|
|
}
|
|
}
|
|
|
|
if(!len) {
|
|
len += snprintf(buffer, sizeof(buffer), "%s\n", "none");
|
|
}
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
else
|
|
*lenp = len;
|
|
|
|
*ppos += len;
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PARPORT_1284
|
|
static int do_autoprobe(const struct ctl_table *table, int write,
|
|
void *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 += snprintf (buffer + len, sizeof(buffer) - len, "CLASS:%s;\n", str);
|
|
|
|
if ((str = info->model) != NULL)
|
|
len += snprintf (buffer + len, sizeof(buffer) - len, "MODEL:%s;\n", str);
|
|
|
|
if ((str = info->mfr) != NULL)
|
|
len += snprintf (buffer + len, sizeof(buffer) - len, "MANUFACTURER:%s;\n", str);
|
|
|
|
if ((str = info->description) != NULL)
|
|
len += snprintf (buffer + len, sizeof(buffer) - len, "DESCRIPTION:%s;\n", str);
|
|
|
|
if ((str = info->cmdset) != NULL)
|
|
len += snprintf (buffer + len, sizeof(buffer) - len, "COMMAND SET:%s;\n", str);
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
else
|
|
*lenp = len;
|
|
|
|
*ppos += len;
|
|
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
#endif /* IEEE1284.3 support. */
|
|
|
|
static int do_hardware_base_addr(const struct ctl_table *table, int write,
|
|
void *result, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct parport *port = (struct parport *)table->extra1;
|
|
char buffer[64];
|
|
int len = 0;
|
|
|
|
if (*ppos) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (write) /* permissions prevent this anyway */
|
|
return -EACCES;
|
|
|
|
len += snprintf (buffer, sizeof(buffer), "%lu\t%lu\n", port->base, port->base_hi);
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
else
|
|
*lenp = len;
|
|
|
|
*ppos += len;
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
|
|
static int do_hardware_irq(const struct ctl_table *table, int write,
|
|
void *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 += snprintf (buffer, sizeof(buffer), "%d\n", port->irq);
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
else
|
|
*lenp = len;
|
|
|
|
*ppos += len;
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
|
|
static int do_hardware_dma(const struct ctl_table *table, int write,
|
|
void *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 += snprintf (buffer, sizeof(buffer), "%d\n", port->dma);
|
|
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
else
|
|
*lenp = len;
|
|
|
|
*ppos += len;
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
|
|
static int do_hardware_modes(const struct ctl_table *table, int write,
|
|
void *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) \
|
|
do { \
|
|
if (port->modes & PARPORT_MODE_##x) \
|
|
len += snprintf(buffer + len, sizeof(buffer) - len, "%s%s", f++ ? "," : "", #x); \
|
|
} while (0)
|
|
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;
|
|
memcpy(result, buffer, len);
|
|
return 0;
|
|
}
|
|
|
|
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 *port_header;
|
|
struct ctl_table_header *devices_header;
|
|
#ifdef CONFIG_PARPORT_1284
|
|
struct ctl_table vars[10];
|
|
#else
|
|
struct ctl_table vars[5];
|
|
#endif /* IEEE 1284 support */
|
|
struct ctl_table device_dir[1];
|
|
};
|
|
|
|
static const struct parport_sysctl_table parport_sysctl_template = {
|
|
.port_header = NULL,
|
|
.devices_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
|
|
},
|
|
#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
|
|
},
|
|
},
|
|
};
|
|
|
|
struct parport_device_sysctl_table
|
|
{
|
|
struct ctl_table_header *sysctl_header;
|
|
struct ctl_table vars[1];
|
|
struct ctl_table device_dir[1];
|
|
};
|
|
|
|
static const struct parport_device_sysctl_table
|
|
parport_device_sysctl_template = {
|
|
.sysctl_header = NULL,
|
|
{
|
|
{
|
|
.procname = "timeslice",
|
|
.data = NULL,
|
|
.maxlen = sizeof(unsigned long),
|
|
.mode = 0644,
|
|
.proc_handler = proc_doulongvec_ms_jiffies_minmax,
|
|
.extra1 = (void*) &parport_min_timeslice_value,
|
|
.extra2 = (void*) &parport_max_timeslice_value
|
|
},
|
|
},
|
|
{
|
|
{
|
|
.procname = NULL,
|
|
.data = NULL,
|
|
.maxlen = 0,
|
|
.mode = 0555,
|
|
},
|
|
}
|
|
};
|
|
|
|
struct parport_default_sysctl_table
|
|
{
|
|
struct ctl_table_header *sysctl_header;
|
|
struct ctl_table vars[2];
|
|
};
|
|
|
|
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
|
|
},
|
|
}
|
|
};
|
|
|
|
int parport_proc_register(struct parport *port)
|
|
{
|
|
struct parport_sysctl_table *t;
|
|
char *tmp_dir_path;
|
|
int i, err = 0;
|
|
|
|
t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
|
|
if (t == NULL)
|
|
return -ENOMEM;
|
|
|
|
t->device_dir[0].extra1 = port;
|
|
|
|
t->vars[0].data = &port->spintime;
|
|
for (i = 0; i < 5; i++) {
|
|
t->vars[i].extra1 = port;
|
|
#ifdef CONFIG_PARPORT_1284
|
|
t->vars[5 + i].extra2 = &port->probe_info[i];
|
|
#endif /* IEEE 1284 support */
|
|
}
|
|
|
|
tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s/devices", port->name);
|
|
if (!tmp_dir_path) {
|
|
err = -ENOMEM;
|
|
goto exit_free_t;
|
|
}
|
|
|
|
t->devices_header = register_sysctl(tmp_dir_path, t->device_dir);
|
|
if (t->devices_header == NULL) {
|
|
err = -ENOENT;
|
|
goto exit_free_tmp_dir_path;
|
|
}
|
|
|
|
kfree(tmp_dir_path);
|
|
|
|
tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s", port->name);
|
|
if (!tmp_dir_path) {
|
|
err = -ENOMEM;
|
|
goto unregister_devices_h;
|
|
}
|
|
|
|
t->port_header = register_sysctl(tmp_dir_path, t->vars);
|
|
if (t->port_header == NULL) {
|
|
err = -ENOENT;
|
|
goto unregister_devices_h;
|
|
}
|
|
|
|
port->sysctl_table = t;
|
|
|
|
kfree(tmp_dir_path);
|
|
return 0;
|
|
|
|
unregister_devices_h:
|
|
unregister_sysctl_table(t->devices_header);
|
|
|
|
exit_free_tmp_dir_path:
|
|
kfree(tmp_dir_path);
|
|
|
|
exit_free_t:
|
|
kfree(t);
|
|
return err;
|
|
}
|
|
|
|
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->devices_header);
|
|
unregister_sysctl_table(t->port_header);
|
|
kfree(t);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int parport_device_proc_register(struct pardevice *device)
|
|
{
|
|
struct parport_device_sysctl_table *t;
|
|
struct parport * port = device->port;
|
|
char *tmp_dir_path;
|
|
int err = 0;
|
|
|
|
t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
|
|
if (t == NULL)
|
|
return -ENOMEM;
|
|
|
|
/* Allocate a buffer for two paths: dev/parport/PORT/devices/DEVICE. */
|
|
tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s/devices/%s", port->name, device->name);
|
|
if (!tmp_dir_path) {
|
|
err = -ENOMEM;
|
|
goto exit_free_t;
|
|
}
|
|
|
|
t->vars[0].data = &device->timeslice;
|
|
|
|
t->sysctl_header = register_sysctl(tmp_dir_path, t->vars);
|
|
if (t->sysctl_header == NULL) {
|
|
kfree(t);
|
|
t = NULL;
|
|
}
|
|
device->sysctl_table = t;
|
|
|
|
kfree(tmp_dir_path);
|
|
return 0;
|
|
|
|
exit_free_t:
|
|
kfree(t);
|
|
|
|
return err;
|
|
}
|
|
|
|
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)
|
|
{
|
|
int ret;
|
|
|
|
parport_default_sysctl_table.sysctl_header =
|
|
register_sysctl("dev/parport/default", parport_default_sysctl_table.vars);
|
|
if (!parport_default_sysctl_table.sysctl_header)
|
|
return -ENOMEM;
|
|
ret = parport_bus_init();
|
|
if (ret) {
|
|
unregister_sysctl_table(parport_default_sysctl_table.
|
|
sysctl_header);
|
|
return ret;
|
|
}
|
|
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;
|
|
}
|
|
parport_bus_exit();
|
|
}
|
|
|
|
#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 parport_bus_init();
|
|
}
|
|
|
|
static void __exit parport_default_proc_unregister (void)
|
|
{
|
|
parport_bus_exit();
|
|
}
|
|
#endif
|
|
|
|
subsys_initcall(parport_default_proc_register)
|
|
module_exit(parport_default_proc_unregister)
|