linux/fs/netfs/main.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Miscellaneous bits for the netfs support library.
 *
 * Copyright (C) 2022 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#include <linux/module.h>
#include <linux/export.h>
#include <linux/mempool.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "internal.h"
#define CREATE_TRACE_POINTS
#include <trace/events/netfs.h>

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;

EXPORT_TRACEPOINT_SYMBOL(…);

unsigned netfs_debug;
module_param_named(debug, netfs_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(…) …;

static struct kmem_cache *netfs_request_slab;
static struct kmem_cache *netfs_subrequest_slab;
mempool_t netfs_request_pool;
mempool_t netfs_subrequest_pool;

#ifdef CONFIG_PROC_FS
LIST_HEAD(…);
DEFINE_SPINLOCK(…);

static const char *netfs_origins[nr__netfs_io_origin] = …;

/*
 * Generate a list of I/O requests in /proc/fs/netfs/requests
 */
static int netfs_requests_seq_show(struct seq_file *m, void *v)
{ … }

static void *netfs_requests_seq_start(struct seq_file *m, loff_t *_pos)
	__acquires(rcu)
{ … }

static void *netfs_requests_seq_next(struct seq_file *m, void *v, loff_t *_pos)
{ … }

static void netfs_requests_seq_stop(struct seq_file *m, void *v)
	__releases(rcu)
{ … }

static const struct seq_operations netfs_requests_seq_ops = …;
#endif /* CONFIG_PROC_FS */

static int __init netfs_init(void)
{ … }
fs_initcall(netfs_init);

static void __exit netfs_exit(void)
{ … }
module_exit(netfs_exit);