Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/blkdev.h>
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#include "internal.h"
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static int devinfo_show(struct seq_file *f, void *v)
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{
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int i = *(loff_t *) v;
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if (i < CHRDEV_MAJOR_MAX) {
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if (i == 0)
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seq_puts(f, "Character devices:\n");
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chrdev_show(f, i);
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}
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#ifdef CONFIG_BLOCK
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else {
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i -= CHRDEV_MAJOR_MAX;
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if (i == 0)
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seq_puts(f, "\nBlock devices:\n");
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blkdev_show(f, i);
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}
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#endif
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return 0;
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}
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static void *devinfo_start(struct seq_file *f, loff_t *pos)
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{
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if (*pos < (BLKDEV_MAJOR_MAX + CHRDEV_MAJOR_MAX))
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return pos;
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return NULL;
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}
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static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
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{
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(*pos)++;
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if (*pos >= (BLKDEV_MAJOR_MAX + CHRDEV_MAJOR_MAX))
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return NULL;
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return pos;
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}
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static void devinfo_stop(struct seq_file *f, void *v)
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{
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/* Nothing to do */
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}
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static const struct seq_operations devinfo_ops = {
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.start = devinfo_start,
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.next = devinfo_next,
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.stop = devinfo_stop,
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.show = devinfo_show
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};
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static int __init proc_devices_init(void)
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{
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struct proc_dir_entry *pde;
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pde = proc_create_seq("devices", 0, NULL, &devinfo_ops);
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pde_make_permanent(pde);
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return 0;
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}
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fs_initcall(proc_devices_init);
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