linux/fs/nfs/cache_lib.c

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/fs/nfs/cache_lib.c
 *
 * Helper routines for the NFS client caches
 *
 * Copyright (c) 2009 Trond Myklebust <[email protected]>
 */
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <net/net_namespace.h>

#include "cache_lib.h"

#define NFS_CACHE_UPCALL_PATHLEN …
#define NFS_CACHE_UPCALL_TIMEOUT …

static char nfs_cache_getent_prog[NFS_CACHE_UPCALL_PATHLEN] = …;
static unsigned long nfs_cache_getent_timeout = …;

module_param_string(…);
MODULE_PARM_DESC(…) …;
module_param_named(cache_getent_timeout, nfs_cache_getent_timeout, ulong, 0600);
MODULE_PARM_DESC(…) …;

int nfs_cache_upcall(struct cache_detail *cd, char *entry_name)
{ … }

/*
 * Deferred request handling
 */
void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq)
{ … }

static void nfs_dns_cache_revisit(struct cache_deferred_req *d, int toomany)
{ … }

static struct cache_deferred_req *nfs_dns_cache_defer(struct cache_req *req)
{ … }

struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void)
{ … }

int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq)
{ … }

int nfs_cache_register_sb(struct super_block *sb, struct cache_detail *cd)
{ … }

int nfs_cache_register_net(struct net *net, struct cache_detail *cd)
{ … }

void nfs_cache_unregister_sb(struct super_block *sb, struct cache_detail *cd)
{ … }

void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd)
{ … }