fddda2b7b5
Variants of proc_create{,_data} that directly take a struct seq_operations
argument and drastically reduces the boilerplate code in the callers.
All trivial callers converted over.
Signed-off-by: Christoph Hellwig <hch@lst.de>
60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/fs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
|
|
static int devinfo_show(struct seq_file *f, void *v)
|
|
{
|
|
int i = *(loff_t *) v;
|
|
|
|
if (i < CHRDEV_MAJOR_MAX) {
|
|
if (i == 0)
|
|
seq_puts(f, "Character devices:\n");
|
|
chrdev_show(f, i);
|
|
}
|
|
#ifdef CONFIG_BLOCK
|
|
else {
|
|
i -= CHRDEV_MAJOR_MAX;
|
|
if (i == 0)
|
|
seq_puts(f, "\nBlock devices:\n");
|
|
blkdev_show(f, i);
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void *devinfo_start(struct seq_file *f, loff_t *pos)
|
|
{
|
|
if (*pos < (BLKDEV_MAJOR_MAX + CHRDEV_MAJOR_MAX))
|
|
return pos;
|
|
return NULL;
|
|
}
|
|
|
|
static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
|
|
{
|
|
(*pos)++;
|
|
if (*pos >= (BLKDEV_MAJOR_MAX + CHRDEV_MAJOR_MAX))
|
|
return NULL;
|
|
return pos;
|
|
}
|
|
|
|
static void devinfo_stop(struct seq_file *f, void *v)
|
|
{
|
|
/* Nothing to do */
|
|
}
|
|
|
|
static const struct seq_operations devinfo_ops = {
|
|
.start = devinfo_start,
|
|
.next = devinfo_next,
|
|
.stop = devinfo_stop,
|
|
.show = devinfo_show
|
|
};
|
|
|
|
static int __init proc_devices_init(void)
|
|
{
|
|
proc_create_seq("devices", 0, NULL, &devinfo_ops);
|
|
return 0;
|
|
}
|
|
fs_initcall(proc_devices_init);
|