linux/fs/orangefs/orangefs-mod.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * (C) 2001 Clemson University and The University of Chicago
 *
 * Changes by Acxiom Corporation to add proc file handler for pvfs2 client
 * parameters, Copyright Acxiom Corporation, 2005.
 *
 * See COPYING in top-level directory.
 */

#include "protocol.h"
#include "orangefs-kernel.h"
#include "orangefs-debugfs.h"
#include "orangefs-sysfs.h"

/* ORANGEFS_VERSION is a ./configure define */
#ifndef ORANGEFS_VERSION
#define ORANGEFS_VERSION …
#endif

/*
 * global variables declared here
 */

struct orangefs_stats orangefs_stats;

/* the size of the hash tables for ops in progress */
int hash_table_size = …;

static ulong module_parm_debug_mask;
__u64 orangefs_gossip_debug_mask;
int op_timeout_secs = …;
int slot_timeout_secs = …;
int orangefs_cache_timeout_msecs = …;
int orangefs_dcache_timeout_msecs = …;
int orangefs_getattr_timeout_msecs = …;

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

static struct file_system_type orangefs_fs_type = …;

module_param(hash_table_size, int, 0);
module_param(module_parm_debug_mask, ulong, 0644);
module_param(op_timeout_secs, int, 0);
module_param(slot_timeout_secs, int, 0);

/*
 * Blocks non-priority requests from being queued for servicing.  This
 * could be used for protecting the request list data structure, but
 * for now it's only being used to stall the op addition to the request
 * list
 */
DEFINE_MUTEX(…) …;

/* hash table for storing operations waiting for matching downcall */
struct list_head *orangefs_htable_ops_in_progress;
DEFINE_SPINLOCK(…);

/* list for queueing upcall operations */
LIST_HEAD(…);

/* used to protect the above orangefs_request_list */
DEFINE_SPINLOCK(…);

/* used for incoming request notification */
DECLARE_WAIT_QUEUE_HEAD(…);

static int __init orangefs_init(void)
{ … }

static void __exit orangefs_exit(void)
{ … }

/*
 * What we do in this function is to walk the list of operations
 * that are in progress in the hash table and mark them as purged as well.
 */
void purge_inprogress_ops(void)
{ … }

module_init(…) …;
module_exit(orangefs_exit);