summaryrefslogtreecommitdiff
path: root/drivers/parport/procfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/parport/procfs.c')
-rw-r--r--drivers/parport/procfs.c117
1 files changed, 38 insertions, 79 deletions
diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c
index 4e5b972c3e26..3880460e67f2 100644
--- a/drivers/parport/procfs.c
+++ b/drivers/parport/procfs.c
@@ -32,15 +32,8 @@
#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
#define PARPORT_MIN_SPINTIME_VALUE 1
#define PARPORT_MAX_SPINTIME_VALUE 1000
-/*
- * PARPORT_BASE_* is the size of the known parts of the sysctl path
- * in dev/partport/%s/devices/%s. "dev/parport/"(12), "/devices/"(9
- * and null char(1).
- */
-#define PARPORT_BASE_PATH_SIZE 13
-#define PARPORT_BASE_DEVICES_PATH_SIZE 22
-static int do_active_device(struct ctl_table *table, int write,
+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;
@@ -58,12 +51,12 @@ static int do_active_device(struct ctl_table *table, int write,
for (dev = port->devices; dev ; dev = dev->next) {
if(dev == port->cad) {
- len += sprintf(buffer, "%s\n", dev->name);
+ len += scnprintf(buffer, sizeof(buffer), "%s\n", dev->name);
}
}
if(!len) {
- len += sprintf(buffer, "%s\n", "none");
+ len += scnprintf(buffer, sizeof(buffer), "%s\n", "none");
}
if (len > *lenp)
@@ -77,7 +70,7 @@ static int do_active_device(struct ctl_table *table, int write,
}
#ifdef CONFIG_PARPORT_1284
-static int do_autoprobe(struct ctl_table *table, int write,
+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;
@@ -94,19 +87,19 @@ static int do_autoprobe(struct ctl_table *table, int write,
}
if ((str = info->class_name) != NULL)
- len += sprintf (buffer + len, "CLASS:%s;\n", str);
+ len += scnprintf (buffer + len, sizeof(buffer) - len, "CLASS:%s;\n", str);
if ((str = info->model) != NULL)
- len += sprintf (buffer + len, "MODEL:%s;\n", str);
+ len += scnprintf (buffer + len, sizeof(buffer) - len, "MODEL:%s;\n", str);
if ((str = info->mfr) != NULL)
- len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
+ len += scnprintf (buffer + len, sizeof(buffer) - len, "MANUFACTURER:%s;\n", str);
if ((str = info->description) != NULL)
- len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
+ len += scnprintf (buffer + len, sizeof(buffer) - len, "DESCRIPTION:%s;\n", str);
if ((str = info->cmdset) != NULL)
- len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
+ len += scnprintf (buffer + len, sizeof(buffer) - len, "COMMAND SET:%s;\n", str);
if (len > *lenp)
len = *lenp;
@@ -120,11 +113,11 @@ static int do_autoprobe(struct ctl_table *table, int write,
}
#endif /* IEEE1284.3 support. */
-static int do_hardware_base_addr(struct ctl_table *table, int write,
+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[20];
+ char buffer[64];
int len = 0;
if (*ppos) {
@@ -135,7 +128,7 @@ static int do_hardware_base_addr(struct ctl_table *table, int write,
if (write) /* permissions prevent this anyway */
return -EACCES;
- len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
+ len += scnprintf (buffer, sizeof(buffer), "%lu\t%lu\n", port->base, port->base_hi);
if (len > *lenp)
len = *lenp;
@@ -147,7 +140,7 @@ static int do_hardware_base_addr(struct ctl_table *table, int write,
return 0;
}
-static int do_hardware_irq(struct ctl_table *table, int write,
+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;
@@ -162,7 +155,7 @@ static int do_hardware_irq(struct ctl_table *table, int write,
if (write) /* permissions prevent this anyway */
return -EACCES;
- len += sprintf (buffer, "%d\n", port->irq);
+ len += scnprintf (buffer, sizeof(buffer), "%d\n", port->irq);
if (len > *lenp)
len = *lenp;
@@ -174,7 +167,7 @@ static int do_hardware_irq(struct ctl_table *table, int write,
return 0;
}
-static int do_hardware_dma(struct ctl_table *table, int write,
+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;
@@ -189,7 +182,7 @@ static int do_hardware_dma(struct ctl_table *table, int write,
if (write) /* permissions prevent this anyway */
return -EACCES;
- len += sprintf (buffer, "%d\n", port->dma);
+ len += scnprintf (buffer, sizeof(buffer), "%d\n", port->dma);
if (len > *lenp)
len = *lenp;
@@ -201,7 +194,7 @@ static int do_hardware_dma(struct ctl_table *table, int write,
return 0;
}
-static int do_hardware_modes(struct ctl_table *table, int write,
+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;
@@ -220,7 +213,7 @@ static int do_hardware_modes(struct ctl_table *table, int write,
#define printmode(x) \
do { \
if (port->modes & PARPORT_MODE_##x) \
- len += sprintf(buffer + len, "%s%s", f++ ? "," : "", #x); \
+ len += scnprintf(buffer + len, sizeof(buffer) - len, "%s%s", f++ ? "," : "", #x); \
} while (0)
int f = 0;
printmode(PCSPP);
@@ -259,8 +252,12 @@ PARPORT_MAX_SPINTIME_VALUE;
struct parport_sysctl_table {
struct ctl_table_header *port_header;
struct ctl_table_header *devices_header;
- struct ctl_table vars[12];
- struct ctl_table device_dir[2];
+#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 = {
@@ -341,7 +338,6 @@ static const struct parport_sysctl_table parport_sysctl_template = {
.proc_handler = do_autoprobe
},
#endif /* IEEE 1284 support */
- {}
},
{
{
@@ -351,19 +347,14 @@ static const struct parport_sysctl_table parport_sysctl_template = {
.mode = 0444,
.proc_handler = do_active_device
},
- {}
},
};
struct parport_device_sysctl_table
{
struct ctl_table_header *sysctl_header;
- struct ctl_table vars[2];
- struct ctl_table device_dir[2];
- struct ctl_table devices_root_dir[2];
- struct ctl_table port_dir[2];
- struct ctl_table parport_dir[2];
- struct ctl_table dev_dir[2];
+ struct ctl_table vars[1];
+ struct ctl_table device_dir[1];
};
static const struct parport_device_sysctl_table
@@ -379,7 +370,6 @@ parport_device_sysctl_template = {
.extra1 = (void*) &parport_min_timeslice_value,
.extra2 = (void*) &parport_max_timeslice_value
},
- {}
},
{
{
@@ -388,17 +378,13 @@ parport_device_sysctl_template = {
.maxlen = 0,
.mode = 0555,
},
- {}
}
};
struct parport_default_sysctl_table
{
struct ctl_table_header *sysctl_header;
- struct ctl_table vars[3];
- struct ctl_table default_dir[2];
- struct ctl_table parport_dir[2];
- struct ctl_table dev_dir[2];
+ struct ctl_table vars[2];
};
static struct parport_default_sysctl_table
@@ -423,7 +409,6 @@ parport_default_sysctl_table = {
.extra1 = (void*) &parport_min_spintime_value,
.extra2 = (void*) &parport_max_spintime_value
},
- {}
}
};
@@ -431,8 +416,7 @@ int parport_proc_register(struct parport *port)
{
struct parport_sysctl_table *t;
char *tmp_dir_path;
- size_t tmp_path_len, port_name_len;
- int bytes_written, i, err = 0;
+ int i, err = 0;
t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
if (t == NULL)
@@ -443,38 +427,28 @@ int parport_proc_register(struct parport *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 */
}
- port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
- /*
- * Allocate a buffer for two paths: dev/parport/PORT and dev/parport/PORT/devices.
- * We calculate for the second as that will give us enough for the first.
- */
- tmp_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len;
- tmp_dir_path = kzalloc(tmp_path_len, GFP_KERNEL);
+ tmp_dir_path = kasprintf(GFP_KERNEL, "dev/parport/%s/devices", port->name);
if (!tmp_dir_path) {
err = -ENOMEM;
goto exit_free_t;
}
- bytes_written = snprintf(tmp_dir_path, tmp_path_len,
- "dev/parport/%s/devices", port->name);
- if (tmp_path_len <= bytes_written) {
- err = -ENOENT;
- goto exit_free_tmp_dir_path;
- }
t->devices_header = register_sysctl(tmp_dir_path, t->device_dir);
if (t->devices_header == NULL) {
err = -ENOENT;
goto exit_free_tmp_dir_path;
}
- tmp_path_len = PARPORT_BASE_PATH_SIZE + port_name_len;
- bytes_written = snprintf(tmp_dir_path, tmp_path_len,
- "dev/parport/%s", port->name);
- if (tmp_path_len <= bytes_written) {
- err = -ENOENT;
+ 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;
}
@@ -514,34 +488,22 @@ int parport_proc_unregister(struct parport *port)
int parport_device_proc_register(struct pardevice *device)
{
- int bytes_written, err = 0;
struct parport_device_sysctl_table *t;
struct parport * port = device->port;
- size_t port_name_len, device_name_len, tmp_dir_path_len;
char *tmp_dir_path;
+ int err = 0;
t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
if (t == NULL)
return -ENOMEM;
- port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
- device_name_len = strnlen(device->name, PATH_MAX);
-
/* Allocate a buffer for two paths: dev/parport/PORT/devices/DEVICE. */
- tmp_dir_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len + device_name_len;
- tmp_dir_path = kzalloc(tmp_dir_path_len, GFP_KERNEL);
+ 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;
}
- bytes_written = snprintf(tmp_dir_path, tmp_dir_path_len, "dev/parport/%s/devices/%s",
- port->name, device->name);
- if (tmp_dir_path_len <= bytes_written) {
- err = -ENOENT;
- goto exit_free_path;
- }
-
t->vars[0].data = &device->timeslice;
t->sysctl_header = register_sysctl(tmp_dir_path, t->vars);
@@ -554,9 +516,6 @@ int parport_device_proc_register(struct pardevice *device)
kfree(tmp_dir_path);
return 0;
-exit_free_path:
- kfree(tmp_dir_path);
-
exit_free_t:
kfree(t);
generated by cgit (git 2.34.1) at 2025-12-24 18:45:41 +0000