mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
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>
130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* tape device driver for S/390 and zSeries tapes.
|
|
*
|
|
* S390 and zSeries version
|
|
* Copyright IBM Corp. 2001
|
|
* Author(s): Carsten Otte <cotte@de.ibm.com>
|
|
* Michael Holzheu <holzheu@de.ibm.com>
|
|
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
|
|
*
|
|
* PROCFS Functions
|
|
*/
|
|
|
|
#define KMSG_COMPONENT "tape"
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/proc_fs.h>
|
|
|
|
#define TAPE_DBF_AREA tape_core_dbf
|
|
|
|
#include "tape.h"
|
|
|
|
static const char *tape_med_st_verbose[MS_SIZE] =
|
|
{
|
|
[MS_UNKNOWN] = "UNKNOWN ",
|
|
[MS_LOADED] = "LOADED ",
|
|
[MS_UNLOADED] = "UNLOADED"
|
|
};
|
|
|
|
/* our proc tapedevices entry */
|
|
static struct proc_dir_entry *tape_proc_devices;
|
|
|
|
/*
|
|
* Show function for /proc/tapedevices
|
|
*/
|
|
static int tape_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct tape_device *device;
|
|
struct tape_request *request;
|
|
const char *str;
|
|
unsigned long n;
|
|
|
|
n = (unsigned long) v - 1;
|
|
if (!n) {
|
|
seq_printf(m, "TapeNo\tBusID CuType/Model\t"
|
|
"DevType/Model\tBlkSize\tState\tOp\tMedState\n");
|
|
}
|
|
device = tape_find_device(n);
|
|
if (IS_ERR(device))
|
|
return 0;
|
|
spin_lock_irq(get_ccwdev_lock(device->cdev));
|
|
seq_printf(m, "%d\t", (int) n);
|
|
seq_printf(m, "%-10.10s ", dev_name(&device->cdev->dev));
|
|
seq_printf(m, "%04X/", device->cdev->id.cu_type);
|
|
seq_printf(m, "%02X\t", device->cdev->id.cu_model);
|
|
seq_printf(m, "%04X/", device->cdev->id.dev_type);
|
|
seq_printf(m, "%02X\t\t", device->cdev->id.dev_model);
|
|
if (device->char_data.block_size == 0)
|
|
seq_printf(m, "auto\t");
|
|
else
|
|
seq_printf(m, "%i\t", device->char_data.block_size);
|
|
if (device->tape_state >= 0 &&
|
|
device->tape_state < TS_SIZE)
|
|
str = tape_state_verbose[device->tape_state];
|
|
else
|
|
str = "UNKNOWN";
|
|
seq_printf(m, "%s\t", str);
|
|
if (!list_empty(&device->req_queue)) {
|
|
request = list_entry(device->req_queue.next,
|
|
struct tape_request, list);
|
|
str = tape_op_verbose[request->op];
|
|
} else
|
|
str = "---";
|
|
seq_printf(m, "%s\t", str);
|
|
seq_printf(m, "%s\n", tape_med_st_verbose[device->medium_state]);
|
|
spin_unlock_irq(get_ccwdev_lock(device->cdev));
|
|
tape_put_device(device);
|
|
return 0;
|
|
}
|
|
|
|
static void *tape_proc_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
if (*pos >= 256 / TAPE_MINORS_PER_DEV)
|
|
return NULL;
|
|
return (void *)((unsigned long) *pos + 1);
|
|
}
|
|
|
|
static void *tape_proc_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return tape_proc_start(m, pos);
|
|
}
|
|
|
|
static void tape_proc_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
static const struct seq_operations tape_proc_seq = {
|
|
.start = tape_proc_start,
|
|
.next = tape_proc_next,
|
|
.stop = tape_proc_stop,
|
|
.show = tape_proc_show,
|
|
};
|
|
|
|
/*
|
|
* Initialize procfs stuff on startup
|
|
*/
|
|
void
|
|
tape_proc_init(void)
|
|
{
|
|
tape_proc_devices = proc_create_seq("tapedevices",
|
|
S_IFREG | S_IRUGO | S_IWUSR, NULL, &tape_proc_seq);
|
|
if (tape_proc_devices == NULL) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cleanup all stuff registered to the procfs
|
|
*/
|
|
void
|
|
tape_proc_cleanup(void)
|
|
{
|
|
if (tape_proc_devices != NULL)
|
|
remove_proc_entry ("tapedevices", NULL);
|
|
}
|