提交 969b21cd 编写于 作者: D Dmitry Torokhov

Input: convert /proc handling to seq_file

Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
上级 2db66876
......@@ -18,6 +18,7 @@
#include <linux/random.h>
#include <linux/major.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/device.h>
......@@ -316,26 +317,6 @@ static struct input_device_id *input_match_device(struct input_device_id *id, st
return NULL;
}
static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
int max, int add_cr)
{
int i;
int len = 0;
for (i = NBITS(max) - 1; i > 0; i--)
if (bitmap[i])
break;
for (; i >= 0; i--)
len += snprintf(buf + len, max(buf_size - len, 0),
"%lx%s", bitmap[i], i > 0 ? " " : "");
if (add_cr)
len += snprintf(buf + len, max(buf_size - len, 0), "\n");
return len;
}
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_bus_input_dir;
......@@ -348,7 +329,7 @@ static inline void input_wakeup_procfs_readers(void)
wake_up(&input_devices_poll_wait);
}
static unsigned int input_devices_poll(struct file *file, poll_table *wait)
static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
{
int state = input_devices_state;
poll_wait(file, &input_devices_poll_wait, wait);
......@@ -357,114 +338,171 @@ static unsigned int input_devices_poll(struct file *file, poll_table *wait)
return 0;
}
#define SPRINTF_BIT(ev, bm) \
do { \
len += sprintf(buf + len, "B: %s=", #ev); \
len += input_print_bitmap(buf + len, INT_MAX, \
dev->bm##bit, ev##_MAX, 1); \
} while (0)
static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos)
{
struct list_head *node;
loff_t i = 0;
#define TEST_AND_SPRINTF_BIT(ev, bm) \
do { \
if (test_bit(EV_##ev, dev->evbit)) \
SPRINTF_BIT(ev, bm); \
} while (0)
list_for_each(node, list)
if (i++ == *pos)
return node;
return NULL;
}
static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos)
{
struct input_dev *dev;
struct input_handle *handle;
const char *path;
if (element->next == list)
return NULL;
off_t at = 0;
int len, cnt = 0;
++(*pos);
return element->next;
}
list_for_each_entry(dev, &input_dev_list, node) {
static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
{
/* acquire lock here ... Yes, we do need locking, I knowi, I know... */
path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
return list_get_nth_element(&input_dev_list, pos);
}
len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
return list_get_next_element(&input_dev_list, v, pos);
}
len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : "");
len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : "");
len += sprintf(buf + len, "H: Handlers=");
static void input_devices_seq_stop(struct seq_file *seq, void *v)
{
/* release lock here */
}
list_for_each_entry(handle, &dev->h_list, d_node)
len += sprintf(buf + len, "%s ", handle->name);
len += sprintf(buf + len, "\n");
SPRINTF_BIT(EV, ev);
TEST_AND_SPRINTF_BIT(KEY, key);
TEST_AND_SPRINTF_BIT(REL, rel);
TEST_AND_SPRINTF_BIT(ABS, abs);
TEST_AND_SPRINTF_BIT(MSC, msc);
TEST_AND_SPRINTF_BIT(LED, led);
TEST_AND_SPRINTF_BIT(SND, snd);
TEST_AND_SPRINTF_BIT(FF, ff);
TEST_AND_SPRINTF_BIT(SW, sw);
len += sprintf(buf + len, "\n");
at += len;
if (at >= pos) {
if (!*start) {
*start = buf + (pos - (at - len));
cnt = at - pos;
} else cnt += len;
buf += len;
if (cnt >= count)
break;
}
static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
unsigned long *bitmap, int max)
{
int i;
kfree(path);
}
for (i = NBITS(max) - 1; i > 0; i--)
if (bitmap[i])
break;
seq_printf(seq, "B: %s=", name);
for (; i >= 0; i--)
seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
seq_putc(seq, '\n');
}
static int input_devices_seq_show(struct seq_file *seq, void *v)
{
struct input_dev *dev = container_of(v, struct input_dev, node);
const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
struct input_handle *handle;
seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
seq_printf(seq, "H: Handlers=");
if (&dev->node == &input_dev_list)
*eof = 1;
list_for_each_entry(handle, &dev->h_list, d_node)
seq_printf(seq, "%s ", handle->name);
seq_putc(seq, '\n');
return (count > cnt) ? cnt : count;
input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
if (test_bit(EV_KEY, dev->evbit))
input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
if (test_bit(EV_REL, dev->evbit))
input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
if (test_bit(EV_ABS, dev->evbit))
input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
if (test_bit(EV_MSC, dev->evbit))
input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
if (test_bit(EV_LED, dev->evbit))
input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
if (test_bit(EV_SND, dev->evbit))
input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
if (test_bit(EV_FF, dev->evbit))
input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
if (test_bit(EV_SW, dev->evbit))
input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
seq_putc(seq, '\n');
kfree(path);
return 0;
}
static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
static struct seq_operations input_devices_seq_ops = {
.start = input_devices_seq_start,
.next = input_devices_seq_next,
.stop = input_devices_seq_stop,
.show = input_devices_seq_show,
};
static int input_proc_devices_open(struct inode *inode, struct file *file)
{
struct input_handler *handler;
return seq_open(file, &input_devices_seq_ops);
}
off_t at = 0;
int len = 0, cnt = 0;
int i = 0;
static struct file_operations input_devices_fileops = {
.owner = THIS_MODULE,
.open = input_proc_devices_open,
.poll = input_proc_devices_poll,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
list_for_each_entry(handler, &input_handler_list, node) {
static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
{
/* acquire lock here ... Yes, we do need locking, I knowi, I know... */
seq->private = (void *)(unsigned long)*pos;
return list_get_nth_element(&input_handler_list, pos);
}
if (handler->fops)
len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n",
i++, handler->name, handler->minor);
else
len = sprintf(buf, "N: Number=%d Name=%s\n",
i++, handler->name);
static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
seq->private = (void *)(unsigned long)(*pos + 1);
return list_get_next_element(&input_handler_list, v, pos);
}
at += len;
static void input_handlers_seq_stop(struct seq_file *seq, void *v)
{
/* release lock here */
}
if (at >= pos) {
if (!*start) {
*start = buf + (pos - (at - len));
cnt = at - pos;
} else cnt += len;
buf += len;
if (cnt >= count)
break;
}
}
if (&handler->node == &input_handler_list)
*eof = 1;
static int input_handlers_seq_show(struct seq_file *seq, void *v)
{
struct input_handler *handler = container_of(v, struct input_handler, node);
return (count > cnt) ? cnt : count;
seq_printf(seq, "N: Number=%ld Name=%s",
(unsigned long)seq->private, handler->name);
if (handler->fops)
seq_printf(seq, " Minor=%d", handler->minor);
seq_putc(seq, '\n');
return 0;
}
static struct seq_operations input_handlers_seq_ops = {
.start = input_handlers_seq_start,
.next = input_handlers_seq_next,
.stop = input_handlers_seq_stop,
.show = input_handlers_seq_show,
};
static struct file_operations input_fileops;
static int input_proc_handlers_open(struct inode *inode, struct file *file)
{
return seq_open(file, &input_handlers_seq_ops);
}
static struct file_operations input_handlers_fileops = {
.owner = THIS_MODULE,
.open = input_proc_handlers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int __init input_proc_init(void)
{
......@@ -476,20 +514,19 @@ static int __init input_proc_init(void)
proc_bus_input_dir->owner = THIS_MODULE;
entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL);
entry = create_proc_entry("devices", 0, proc_bus_input_dir);
if (!entry)
goto fail1;
entry->owner = THIS_MODULE;
input_fileops = *entry->proc_fops;
input_fileops.poll = input_devices_poll;
entry->proc_fops = &input_fileops;
entry->proc_fops = &input_devices_fileops;
entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL);
entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
if (!entry)
goto fail2;
entry->owner = THIS_MODULE;
entry->proc_fops = &input_handlers_fileops;
return 0;
......@@ -631,6 +668,26 @@ static struct attribute_group input_dev_id_attr_group = {
.attrs = input_dev_id_attrs,
};
static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
int max, int add_cr)
{
int i;
int len = 0;
for (i = NBITS(max) - 1; i > 0; i--)
if (bitmap[i])
break;
for (; i >= 0; i--)
len += snprintf(buf + len, max(buf_size - len, 0),
"%lx%s", bitmap[i], i > 0 ? " " : "");
if (add_cr)
len += snprintf(buf + len, max(buf_size - len, 0), "\n");
return len;
}
#define INPUT_DEV_CAP_ATTR(ev, bm) \
static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
{ \
......
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