[net-next-2.6.git] / fs / nfsd / nfsctl.c

/*
 * linux/fs/nfsd/nfsctl.c
 *
 * Syscall interface to knfsd.
 *
 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/module.h>

#include <linux/linkage.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/syscalls.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/smp_lock.h>
#include <linux/ctype.h>

#include <linux/nfs.h>
#include <linux/nfsd_idmap.h>
#include <linux/lockd/bind.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>

#include <asm/uaccess.h>

/*
 *	We have a single directory with 9 nodes in it.
 */
enum {
	NFSD_Root = 1,
	NFSD_Svc,
	NFSD_Add,
	NFSD_Del,
	NFSD_Export,
	NFSD_Unexport,
	NFSD_Getfd,
	NFSD_Getfs,
	NFSD_List,
	NFSD_Fh,
	NFSD_Threads,
	NFSD_Pool_Threads,
	NFSD_Versions,
	NFSD_Ports,
	NFSD_MaxBlkSize,
	/*
	 * The below MUST come last.  Otherwise we leave a hole in nfsd_files[]
	 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
	 */
#ifdef CONFIG_NFSD_V4
	NFSD_Leasetime,
	NFSD_RecoveryDir,
#endif
};

/*
 * write() for these nodes.
 */
static ssize_t write_svc(struct file *file, char *buf, size_t size);
static ssize_t write_add(struct file *file, char *buf, size_t size);
static ssize_t write_del(struct file *file, char *buf, size_t size);
static ssize_t write_export(struct file *file, char *buf, size_t size);
static ssize_t write_unexport(struct file *file, char *buf, size_t size);
static ssize_t write_getfd(struct file *file, char *buf, size_t size);
static ssize_t write_getfs(struct file *file, char *buf, size_t size);
static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
static ssize_t write_threads(struct file *file, char *buf, size_t size);
static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
static ssize_t write_versions(struct file *file, char *buf, size_t size);
static ssize_t write_ports(struct file *file, char *buf, size_t size);
static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
#ifdef CONFIG_NFSD_V4
static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
#endif

static ssize_t (*write_op[])(struct file *, char *, size_t) = {
	[NFSD_Svc] = write_svc,
	[NFSD_Add] = write_add,
	[NFSD_Del] = write_del,
	[NFSD_Export] = write_export,
	[NFSD_Unexport] = write_unexport,
	[NFSD_Getfd] = write_getfd,
	[NFSD_Getfs] = write_getfs,
	[NFSD_Fh] = write_filehandle,
	[NFSD_Threads] = write_threads,
	[NFSD_Pool_Threads] = write_pool_threads,
	[NFSD_Versions] = write_versions,
	[NFSD_Ports] = write_ports,
	[NFSD_MaxBlkSize] = write_maxblksize,
#ifdef CONFIG_NFSD_V4
	[NFSD_Leasetime] = write_leasetime,
	[NFSD_RecoveryDir] = write_recoverydir,
#endif
};

static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
{
	ino_t ino =  file->f_path.dentry->d_inode->i_ino;
	char *data;
	ssize_t rv;

	if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
		return -EINVAL;

	data = simple_transaction_get(file, buf, size);
	if (IS_ERR(data))
		return PTR_ERR(data);

	rv =  write_op[ino](file, data, size);
	if (rv >= 0) {
		simple_transaction_set(file, rv);
		rv = size;
	}
	return rv;
}

static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
{
	if (! file->private_data) {
		/* An attempt to read a transaction file without writing
		 * causes a 0-byte write so that the file can return
		 * state information
		 */
		ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
		if (rv < 0)
			return rv;
	}
	return simple_transaction_read(file, buf, size, pos);
}

static const struct file_operations transaction_ops = {
	.write		= nfsctl_transaction_write,
	.read		= nfsctl_transaction_read,
	.release	= simple_transaction_release,
};

extern struct seq_operations nfs_exports_op;
static int exports_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &nfs_exports_op);
}

static const struct file_operations exports_operations = {
	.open		= exports_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

/*----------------------------------------------------------------------------*/
/*
 * payload - write methods
 * If the method has a response, the response should be put in buf,
 * and the length returned.  Otherwise return 0 or and -error.
 */

static ssize_t write_svc(struct file *file, char *buf, size_t size)
{
	struct nfsctl_svc *data;
	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_svc*) buf;
	return nfsd_svc(data->svc_port, data->svc_nthreads);
}

static ssize_t write_add(struct file *file, char *buf, size_t size)
{
	struct nfsctl_client *data;
	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_client *)buf;
	return exp_addclient(data);
}

static ssize_t write_del(struct file *file, char *buf, size_t size)
{
	struct nfsctl_client *data;
	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_client *)buf;
	return exp_delclient(data);
}

static ssize_t write_export(struct file *file, char *buf, size_t size)
{
	struct nfsctl_export *data;
	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_export*)buf;
	return exp_export(data);
}

static ssize_t write_unexport(struct file *file, char *buf, size_t size)
{
	struct nfsctl_export *data;

	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_export*)buf;
	return exp_unexport(data);
}

static ssize_t write_getfs(struct file *file, char *buf, size_t size)
{
	struct nfsctl_fsparm *data;
	struct sockaddr_in *sin;
	struct auth_domain *clp;
	int err = 0;
	struct knfsd_fh *res;

	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_fsparm*)buf;
	err = -EPROTONOSUPPORT;
	if (data->gd_addr.sa_family != AF_INET)
		goto out;
	sin = (struct sockaddr_in *)&data->gd_addr;
	if (data->gd_maxlen > NFS3_FHSIZE)
		data->gd_maxlen = NFS3_FHSIZE;

	res = (struct knfsd_fh*)buf;

	exp_readlock();
	if (!(clp = auth_unix_lookup(sin->sin_addr)))
		err = -EPERM;
	else {
		err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
		auth_domain_put(clp);
	}
	exp_readunlock();
	if (err == 0)
		err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
 out:
	return err;
}

static ssize_t write_getfd(struct file *file, char *buf, size_t size)
{
	struct nfsctl_fdparm *data;
	struct sockaddr_in *sin;
	struct auth_domain *clp;
	int err = 0;
	struct knfsd_fh fh;
	char *res;

	if (size < sizeof(*data))
		return -EINVAL;
	data = (struct nfsctl_fdparm*)buf;
	err = -EPROTONOSUPPORT;
	if (data->gd_addr.sa_family != AF_INET)
		goto out;
	err = -EINVAL;
	if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
		goto out;

	res = buf;
	sin = (struct sockaddr_in *)&data->gd_addr;
	exp_readlock();
	if (!(clp = auth_unix_lookup(sin->sin_addr)))
		err = -EPERM;
	else {
		err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
		auth_domain_put(clp);
	}
	exp_readunlock();

	if (err == 0) {
		memset(res,0, NFS_FHSIZE);
		memcpy(res, &fh.fh_base, fh.fh_size);
		err = NFS_FHSIZE;
	}
 out:
	return err;
}

static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
{
	/* request is:
	 *   domain path maxsize
	 * response is
	 *   filehandle
	 *
	 * qword quoting is used, so filehandle will be \x....
	 */
	char *dname, *path;
	int maxsize;
	char *mesg = buf;
	int len;
	struct auth_domain *dom;
	struct knfsd_fh fh;

	if (buf[size-1] != '\n')
		return -EINVAL;
	buf[size-1] = 0;

	dname = mesg;
	len = qword_get(&mesg, dname, size);
	if (len <= 0) return -EINVAL;
	
	path = dname+len+1;
	len = qword_get(&mesg, path, size);
	if (len <= 0) return -EINVAL;

	len = get_int(&mesg, &maxsize);
	if (len)
		return len;

	if (maxsize < NFS_FHSIZE)
		return -EINVAL;
	if (maxsize > NFS3_FHSIZE)
		maxsize = NFS3_FHSIZE;

	if (qword_get(&mesg, mesg, size)>0)
		return -EINVAL;

	/* we have all the words, they are in buf.. */
	dom = unix_domain_find(dname);
	if (!dom)
		return -ENOMEM;

	len = exp_rootfh(dom, path, &fh,  maxsize);
	auth_domain_put(dom);
	if (len)
		return len;
	
	mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
	qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
	mesg[-1] = '\n';
	return mesg - buf;	
}

extern int nfsd_nrthreads(void);

static ssize_t write_threads(struct file *file, char *buf, size_t size)
{
	/* if size > 0, look for a number of threads and call nfsd_svc
	 * then write out number of threads as reply
	 */
	char *mesg = buf;
	int rv;
	if (size > 0) {
		int newthreads;
		rv = get_int(&mesg, &newthreads);
		if (rv)
			return rv;
		if (newthreads <0)
			return -EINVAL;
		rv = nfsd_svc(2049, newthreads);
		if (rv)
			return rv;
	}
	sprintf(buf, "%d\n", nfsd_nrthreads());
	return strlen(buf);
}

extern int nfsd_nrpools(void);
extern int nfsd_get_nrthreads(int n, int *);
extern int nfsd_set_nrthreads(int n, int *);

static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
{
	/* if size > 0, look for an array of number of threads per node
	 * and apply them  then write out number of threads per node as reply
	 */
	char *mesg = buf;
	int i;
	int rv;
	int len;
    	int npools = nfsd_nrpools();
	int *nthreads;

	if (npools == 0) {
		/*
		 * NFS is shut down.  The admin can start it by
		 * writing to the threads file but NOT the pool_threads
		 * file, sorry.  Report zero threads.
		 */
		strcpy(buf, "0\n");
		return strlen(buf);
	}

	nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
	if (nthreads == NULL)
		return -ENOMEM;

	if (size > 0) {
		for (i = 0; i < npools; i++) {
			rv = get_int(&mesg, &nthreads[i]);
			if (rv == -ENOENT)
				break;		/* fewer numbers than pools */
			if (rv)
				goto out_free;	/* syntax error */
			rv = -EINVAL;
			if (nthreads[i] < 0)
				goto out_free;
		}
		rv = nfsd_set_nrthreads(i, nthreads);
		if (rv)
			goto out_free;
	}

	rv = nfsd_get_nrthreads(npools, nthreads);
	if (rv)
		goto out_free;

	mesg = buf;
	size = SIMPLE_TRANSACTION_LIMIT;
	for (i = 0; i < npools && size > 0; i++) {
		snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
		len = strlen(mesg);
		size -= len;
		mesg += len;
	}

	return (mesg-buf);

out_free:
	kfree(nthreads);
	return rv;
}

static ssize_t write_versions(struct file *file, char *buf, size_t size)
{
	/*
	 * Format:
	 *   [-/+]vers [-/+]vers ...
	 */
	char *mesg = buf;
	char *vers, sign;
	int len, num;
	ssize_t tlen = 0;
	char *sep;

	if (size>0) {
		if (nfsd_serv)
			/* Cannot change versions without updating
			 * nfsd_serv->sv_xdrsize, and reallocing
			 * rq_argp and rq_resp
			 */
			return -EBUSY;
		if (buf[size-1] != '\n')
			return -EINVAL;
		buf[size-1] = 0;

		vers = mesg;
		len = qword_get(&mesg, vers, size);
		if (len <= 0) return -EINVAL;
		do {
			sign = *vers;
			if (sign == '+' || sign == '-')
				num = simple_strtol((vers+1), NULL, 0);
			else
				num = simple_strtol(vers, NULL, 0);
			switch(num) {
			case 2:
			case 3:
			case 4:
				nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
				break;
			default:
				return -EINVAL;
			}
			vers += len + 1;
			tlen += len;
		} while ((len = qword_get(&mesg, vers, size)) > 0);
		/* If all get turned off, turn them back on, as
		 * having no versions is BAD
		 */
		nfsd_reset_versions();
	}
	/* Now write current state into reply buffer */
	len = 0;
	sep = "";
	for (num=2 ; num <= 4 ; num++)
		if (nfsd_vers(num, NFSD_AVAIL)) {
			len += sprintf(buf+len, "%s%c%d", sep,
				       nfsd_vers(num, NFSD_TEST)?'+':'-',
				       num);
			sep = " ";
		}
	len += sprintf(buf+len, "\n");
	return len;
}

static ssize_t write_ports(struct file *file, char *buf, size_t size)
{
	if (size == 0) {
		int len = 0;
		lock_kernel();
		if (nfsd_serv)
			len = svc_sock_names(buf, nfsd_serv, NULL);
		unlock_kernel();
		return len;
	}
	/* Either a single 'fd' number is written, in which
	 * case it must be for a socket of a supported family/protocol,
	 * and we use it as an nfsd socket, or
	 * A '-' followed by the 'name' of a socket in which case
	 * we close the socket.
	 */
	if (isdigit(buf[0])) {
		char *mesg = buf;
		int fd;
		int err;
		err = get_int(&mesg, &fd);
		if (err)
			return -EINVAL;
		if (fd < 0)
			return -EINVAL;
		err = nfsd_create_serv();
		if (!err) {
			int proto = 0;
			err = svc_addsock(nfsd_serv, fd, buf, &proto);
			if (err >= 0) {
				err = lockd_up(proto);
				if (err < 0)
					svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
			}
			/* Decrease the count, but don't shutdown the
			 * the service
			 */
			lock_kernel();
			nfsd_serv->sv_nrthreads--;
			unlock_kernel();
		}
		return err < 0 ? err : 0;
	}
	if (buf[0] == '-') {
		char *toclose = kstrdup(buf+1, GFP_KERNEL);
		int len = 0;
		if (!toclose)
			return -ENOMEM;
		lock_kernel();
		if (nfsd_serv)
			len = svc_sock_names(buf, nfsd_serv, toclose);
		unlock_kernel();
		if (len >= 0)
			lockd_down();
		kfree(toclose);
		return len;
	}
	return -EINVAL;
}

int nfsd_max_blksize;

static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
{
	char *mesg = buf;
	if (size > 0) {
		int bsize;
		int rv = get_int(&mesg, &bsize);
		if (rv)
			return rv;
		/* force bsize into allowed range and
		 * required alignment.
		 */
		if (bsize < 1024)
			bsize = 1024;
		if (bsize > NFSSVC_MAXBLKSIZE)
			bsize = NFSSVC_MAXBLKSIZE;
		bsize &= ~(1024-1);
		lock_kernel();
		if (nfsd_serv && nfsd_serv->sv_nrthreads) {
			unlock_kernel();
			return -EBUSY;
		}
		nfsd_max_blksize = bsize;
		unlock_kernel();
	}
	return sprintf(buf, "%d\n", nfsd_max_blksize);
}

#ifdef CONFIG_NFSD_V4
extern time_t nfs4_leasetime(void);

static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
{
	/* if size > 10 seconds, call
	 * nfs4_reset_lease() then write out the new lease (seconds) as reply
	 */
	char *mesg = buf;
	int rv;

	if (size > 0) {
		int lease;
		rv = get_int(&mesg, &lease);
		if (rv)
			return rv;
		if (lease < 10 || lease > 3600)
			return -EINVAL;
		nfs4_reset_lease(lease);
	}
	sprintf(buf, "%ld\n", nfs4_lease_time());
	return strlen(buf);
}

static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
{
	char *mesg = buf;
	char *recdir;
	int len, status;

	if (size > PATH_MAX || buf[size-1] != '\n')
		return -EINVAL;
	buf[size-1] = 0;

	recdir = mesg;
	len = qword_get(&mesg, recdir, size);
	if (len <= 0)
		return -EINVAL;

	status = nfs4_reset_recoverydir(recdir);
	return strlen(buf);
}
#endif

/*----------------------------------------------------------------------------*/
/*
 *	populating the filesystem.
 */

static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
{
	static struct tree_descr nfsd_files[] = {
		[NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
		[NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
		[NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
		[NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
		[NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
		[NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_List] = {"exports", &exports_operations, S_IRUGO},
		[NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
		[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
#ifdef CONFIG_NFSD_V4
		[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
		[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
#endif
		/* last one */ {""}
	};
	return simple_fill_super(sb, 0x6e667364, nfsd_files);
}

static int nfsd_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
	return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
}

static struct file_system_type nfsd_fs_type = {
	.owner		= THIS_MODULE,
	.name		= "nfsd",
	.get_sb		= nfsd_get_sb,
	.kill_sb	= kill_litter_super,
};

static int __init init_nfsd(void)
{
	int retval;
	printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");

	nfsd_stat_init();	/* Statistics */
	nfsd_cache_init();	/* RPC reply cache */
	nfsd_export_init();	/* Exports table */
	nfsd_lockd_init();	/* lockd->nfsd callbacks */
	nfs4_state_init();	/* NFSv4 locking state */
	nfsd_idmap_init();      /* Name to ID mapping */
	if (proc_mkdir("fs/nfs", NULL)) {
		struct proc_dir_entry *entry;
		entry = create_proc_entry("fs/nfs/exports", 0, NULL);
		if (entry)
			entry->proc_fops =  &exports_operations;
	}
	retval = register_filesystem(&nfsd_fs_type);
	if (retval) {
		nfsd_export_shutdown();
		nfsd_cache_shutdown();
		remove_proc_entry("fs/nfs/exports", NULL);
		remove_proc_entry("fs/nfs", NULL);
		nfsd_stat_shutdown();
		nfsd_lockd_shutdown();
	}
	return retval;
}

static void __exit exit_nfsd(void)
{
	nfsd_export_shutdown();
	nfsd_cache_shutdown();
	remove_proc_entry("fs/nfs/exports", NULL);
	remove_proc_entry("fs/nfs", NULL);
	nfsd_stat_shutdown();
	nfsd_lockd_shutdown();
	nfsd_idmap_shutdown();
	unregister_filesystem(&nfsd_fs_type);
}

MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
MODULE_LICENSE("GPL");
module_init(init_nfsd)
module_exit(exit_nfsd)
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/nfsd/nfsctl.c
	3	*
	4	* Syscall interface to knfsd.
	5	*
	6	* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
1da177e4 LT	9	#include <linux/module.h>
	10
	11	#include <linux/linkage.h>
	12	#include <linux/time.h>
	13	#include <linux/errno.h>
	14	#include <linux/fs.h>
	15	#include <linux/fcntl.h>
	16	#include <linux/net.h>
	17	#include <linux/in.h>
	18	#include <linux/syscalls.h>
	19	#include <linux/unistd.h>
	20	#include <linux/slab.h>
	21	#include <linux/proc_fs.h>
	22	#include <linux/seq_file.h>
	23	#include <linux/pagemap.h>
	24	#include <linux/init.h>
70c3b76c	25	#include <linux/string.h>
80212d59	26	#include <linux/smp_lock.h>
b41b66d6	27	#include <linux/ctype.h>
1da177e4 LT	28
	29	#include <linux/nfs.h>
	30	#include <linux/nfsd_idmap.h>
b41b66d6	31	#include <linux/lockd/bind.h>
1da177e4	32	#include <linux/sunrpc/svc.h>
80212d59	33	#include <linux/sunrpc/svcsock.h>
1da177e4 LT	34	#include <linux/nfsd/nfsd.h>
	35	#include <linux/nfsd/cache.h>
	36	#include <linux/nfsd/xdr.h>
	37	#include <linux/nfsd/syscall.h>
1da177e4 LT	38
	39	#include <asm/uaccess.h>
	40
	41	/*
	42	* We have a single directory with 9 nodes in it.
	43	*/
	44	enum {
	45	NFSD_Root = 1,
	46	NFSD_Svc,
	47	NFSD_Add,
	48	NFSD_Del,
	49	NFSD_Export,
	50	NFSD_Unexport,
	51	NFSD_Getfd,
	52	NFSD_Getfs,
	53	NFSD_List,
	54	NFSD_Fh,
	55	NFSD_Threads,
eed2965a	56	NFSD_Pool_Threads,
70c3b76c	57	NFSD_Versions,
80212d59	58	NFSD_Ports,
596bbe53	59	NFSD_MaxBlkSize,
70c3b76c N	60	/*
	61	* The below MUST come last. Otherwise we leave a hole in nfsd_files[]
	62	* with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
	63	*/
	64	#ifdef CONFIG_NFSD_V4
1da177e4	65	NFSD_Leasetime,
0964a3d3	66	NFSD_RecoveryDir,
70c3b76c	67	#endif
1da177e4 LT	68	};
	69
	70	/*
	71	* write() for these nodes.
	72	*/
	73	static ssize_t write_svc(struct file file, char buf, size_t size);
	74	static ssize_t write_add(struct file file, char buf, size_t size);
	75	static ssize_t write_del(struct file file, char buf, size_t size);
	76	static ssize_t write_export(struct file file, char buf, size_t size);
	77	static ssize_t write_unexport(struct file file, char buf, size_t size);
	78	static ssize_t write_getfd(struct file file, char buf, size_t size);
	79	static ssize_t write_getfs(struct file file, char buf, size_t size);
	80	static ssize_t write_filehandle(struct file file, char buf, size_t size);
	81	static ssize_t write_threads(struct file file, char buf, size_t size);
eed2965a	82	static ssize_t write_pool_threads(struct file file, char buf, size_t size);
70c3b76c	83	static ssize_t write_versions(struct file file, char buf, size_t size);
80212d59	84	static ssize_t write_ports(struct file file, char buf, size_t size);
596bbe53	85	static ssize_t write_maxblksize(struct file file, char buf, size_t size);
70c3b76c	86	#ifdef CONFIG_NFSD_V4
1da177e4	87	static ssize_t write_leasetime(struct file file, char buf, size_t size);
0964a3d3	88	static ssize_t write_recoverydir(struct file file, char buf, size_t size);
70c3b76c	89	#endif
1da177e4 LT	90
	91	static ssize_t (write_op[])(struct file , char *, size_t) = {
	92	[NFSD_Svc] = write_svc,
	93	[NFSD_Add] = write_add,
	94	[NFSD_Del] = write_del,
	95	[NFSD_Export] = write_export,
	96	[NFSD_Unexport] = write_unexport,
	97	[NFSD_Getfd] = write_getfd,
	98	[NFSD_Getfs] = write_getfs,
	99	[NFSD_Fh] = write_filehandle,
	100	[NFSD_Threads] = write_threads,
eed2965a	101	[NFSD_Pool_Threads] = write_pool_threads,
70c3b76c	102	[NFSD_Versions] = write_versions,
80212d59	103	[NFSD_Ports] = write_ports,
596bbe53	104	[NFSD_MaxBlkSize] = write_maxblksize,
70c3b76c	105	#ifdef CONFIG_NFSD_V4
1da177e4	106	[NFSD_Leasetime] = write_leasetime,
0964a3d3	107	[NFSD_RecoveryDir] = write_recoverydir,
70c3b76c	108	#endif
1da177e4 LT	109	};
	110
	111	static ssize_t nfsctl_transaction_write(struct file file, const char __user buf, size_t size, loff_t *pos)
	112	{
7eaa36e2	113	ino_t ino = file->f_path.dentry->d_inode->i_ino;
1da177e4 LT	114	char *data;
	115	ssize_t rv;
	116
e8c96f8c	117	if (ino >= ARRAY_SIZE(write_op) \|\| !write_op[ino])
1da177e4 LT	118	return -EINVAL;
	119
	120	data = simple_transaction_get(file, buf, size);
	121	if (IS_ERR(data))
	122	return PTR_ERR(data);
	123
	124	rv = write_op[ino](file, data, size);
8971a101	125	if (rv >= 0) {
1da177e4 LT	126	simple_transaction_set(file, rv);
	127	rv = size;
	128	}
	129	return rv;
	130	}
	131
7390022d N	132	static ssize_t nfsctl_transaction_read(struct file file, char __user buf, size_t size, loff_t *pos)
	133	{
	134	if (! file->private_data) {
	135	/* An attempt to read a transaction file without writing
	136	* causes a 0-byte write so that the file can return
	137	* state information
	138	*/
	139	ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
	140	if (rv < 0)
	141	return rv;
	142	}
	143	return simple_transaction_read(file, buf, size, pos);
	144	}
	145
4b6f5d20	146	static const struct file_operations transaction_ops = {
1da177e4	147	.write = nfsctl_transaction_write,
7390022d	148	.read = nfsctl_transaction_read,
1da177e4 LT	149	.release = simple_transaction_release,
	150	};
	151
	152	extern struct seq_operations nfs_exports_op;
	153	static int exports_open(struct inode inode, struct file file)
	154	{
	155	return seq_open(file, &nfs_exports_op);
	156	}
	157
4b6f5d20	158	static const struct file_operations exports_operations = {
1da177e4 LT	159	.open = exports_open,
	160	.read = seq_read,
	161	.llseek = seq_lseek,
	162	.release = seq_release,
	163	};
	164
	165	/----------------------------------------------------------------------------/
	166	/*
	167	* payload - write methods
	168	* If the method has a response, the response should be put in buf,
	169	* and the length returned. Otherwise return 0 or and -error.
	170	*/
	171
	172	static ssize_t write_svc(struct file file, char buf, size_t size)
	173	{
	174	struct nfsctl_svc *data;
	175	if (size < sizeof(*data))
	176	return -EINVAL;
	177	data = (struct nfsctl_svc*) buf;
	178	return nfsd_svc(data->svc_port, data->svc_nthreads);
	179	}
	180
	181	static ssize_t write_add(struct file file, char buf, size_t size)
	182	{
	183	struct nfsctl_client *data;
	184	if (size < sizeof(*data))
	185	return -EINVAL;
	186	data = (struct nfsctl_client *)buf;
	187	return exp_addclient(data);
	188	}
	189
	190	static ssize_t write_del(struct file file, char buf, size_t size)
	191	{
	192	struct nfsctl_client *data;
	193	if (size < sizeof(*data))
	194	return -EINVAL;
	195	data = (struct nfsctl_client *)buf;
	196	return exp_delclient(data);
	197	}
	198
	199	static ssize_t write_export(struct file file, char buf, size_t size)
	200	{
	201	struct nfsctl_export *data;
	202	if (size < sizeof(*data))
	203	return -EINVAL;
	204	data = (struct nfsctl_export*)buf;
	205	return exp_export(data);
	206	}
	207
	208	static ssize_t write_unexport(struct file file, char buf, size_t size)
	209	{
	210	struct nfsctl_export *data;
	211
	212	if (size < sizeof(*data))
	213	return -EINVAL;
	214	data = (struct nfsctl_export*)buf;
	215	return exp_unexport(data);
	216	}
	217
	218	static ssize_t write_getfs(struct file file, char buf, size_t size)
	219	{
	220	struct nfsctl_fsparm *data;
	221	struct sockaddr_in *sin;
	222	struct auth_domain *clp;
223	int err = 0;
224	struct knfsd_fh *res;
225
226	if (size < sizeof(*data))
227	return -EINVAL;
228	data = (struct nfsctl_fsparm*)buf;
229	err = -EPROTONOSUPPORT;
230	if (data->gd_addr.sa_family != AF_INET)
231	goto out;
232	sin = (struct sockaddr_in *)&data->gd_addr;
233	if (data->gd_maxlen > NFS3_FHSIZE)
234	data->gd_maxlen = NFS3_FHSIZE;
235
236	res = (struct knfsd_fh*)buf;
237
238	exp_readlock();
239	if (!(clp = auth_unix_lookup(sin->sin_addr)))
240	err = -EPERM;
241	else {
242	err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
243	auth_domain_put(clp);
244	}
245	exp_readunlock();
246	if (err == 0)
12127498	247	err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
1da177e4 LT	248	out:
	249	return err;
	250	}
	251
	252	static ssize_t write_getfd(struct file file, char buf, size_t size)
	253	{
	254	struct nfsctl_fdparm *data;
	255	struct sockaddr_in *sin;
	256	struct auth_domain *clp;
	257	int err = 0;
	258	struct knfsd_fh fh;
	259	char *res;
	260
	261	if (size < sizeof(*data))
	262	return -EINVAL;
	263	data = (struct nfsctl_fdparm*)buf;
	264	err = -EPROTONOSUPPORT;
	265	if (data->gd_addr.sa_family != AF_INET)
	266	goto out;
	267	err = -EINVAL;
	268	if (data->gd_version < 2 \|\| data->gd_version > NFSSVC_MAXVERS)
	269	goto out;
	270
	271	res = buf;
	272	sin = (struct sockaddr_in *)&data->gd_addr;
	273	exp_readlock();
	274	if (!(clp = auth_unix_lookup(sin->sin_addr)))
	275	err = -EPERM;
	276	else {
	277	err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
	278	auth_domain_put(clp);
	279	}
	280	exp_readunlock();
	281
	282	if (err == 0) {
	283	memset(res,0, NFS_FHSIZE);
	284	memcpy(res, &fh.fh_base, fh.fh_size);
	285	err = NFS_FHSIZE;
	286	}
	287	out:
	288	return err;
	289	}
	290
	291	static ssize_t write_filehandle(struct file file, char buf, size_t size)
	292	{
	293	/* request is:
	294	* domain path maxsize
	295	* response is
	296	* filehandle
	297	*
	298	* qword quoting is used, so filehandle will be \x....
	299	*/
	300	char dname, path;
	301	int maxsize;
	302	char *mesg = buf;
	303	int len;
	304	struct auth_domain *dom;
	305	struct knfsd_fh fh;
	306
	307	if (buf[size-1] != '\n')
	308	return -EINVAL;
	309	buf[size-1] = 0;
	310
	311	dname = mesg;
312	len = qword_get(&mesg, dname, size);
313	if (len <= 0) return -EINVAL;
314
315	path = dname+len+1;
316	len = qword_get(&mesg, path, size);
317	if (len <= 0) return -EINVAL;
318
319	len = get_int(&mesg, &maxsize);
320	if (len)
321	return len;
322
323	if (maxsize < NFS_FHSIZE)
324	return -EINVAL;
325	if (maxsize > NFS3_FHSIZE)
326	maxsize = NFS3_FHSIZE;
327
328	if (qword_get(&mesg, mesg, size)>0)
329	return -EINVAL;
330
331	/* we have all the words, they are in buf.. */
332	dom = unix_domain_find(dname);
333	if (!dom)
334	return -ENOMEM;
335
336	len = exp_rootfh(dom, path, &fh, maxsize);
337	auth_domain_put(dom);
338	if (len)
339	return len;
340
341	mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
342	qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
343	mesg[-1] = '\n';
344	return mesg - buf;
345	}
346
347	extern int nfsd_nrthreads(void);
348
349	static ssize_t write_threads(struct file file, char buf, size_t size)
350	{
351	/* if size > 0, look for a number of threads and call nfsd_svc
352	* then write out number of threads as reply
353	*/
354	char *mesg = buf;
355	int rv;
356	if (size > 0) {
357	int newthreads;
358	rv = get_int(&mesg, &newthreads);
359	if (rv)
360	return rv;
361	if (newthreads <0)
362	return -EINVAL;
363	rv = nfsd_svc(2049, newthreads);
364	if (rv)
365	return rv;
366	}
367	sprintf(buf, "%d\n", nfsd_nrthreads());
368	return strlen(buf);
369	}
370
eed2965a GB	371	extern int nfsd_nrpools(void);
	372	extern int nfsd_get_nrthreads(int n, int *);
	373	extern int nfsd_set_nrthreads(int n, int *);
	374
	375	static ssize_t write_pool_threads(struct file file, char buf, size_t size)
	376	{
	377	/* if size > 0, look for an array of number of threads per node
	378	* and apply them then write out number of threads per node as reply
	379	*/
	380	char *mesg = buf;
	381	int i;
	382	int rv;
	383	int len;
	384	int npools = nfsd_nrpools();
	385	int *nthreads;
	386
	387	if (npools == 0) {
	388	/*
	389	* NFS is shut down. The admin can start it by
	390	* writing to the threads file but NOT the pool_threads
	391	* file, sorry. Report zero threads.
	392	*/
	393	strcpy(buf, "0\n");
	394	return strlen(buf);
	395	}
	396
	397	nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
	398	if (nthreads == NULL)
	399	return -ENOMEM;
	400
	401	if (size > 0) {
	402	for (i = 0; i < npools; i++) {
	403	rv = get_int(&mesg, &nthreads[i]);
	404	if (rv == -ENOENT)
	405	break; /* fewer numbers than pools */
	406	if (rv)
	407	goto out_free; /* syntax error */
	408	rv = -EINVAL;
	409	if (nthreads[i] < 0)
	410	goto out_free;
	411	}
	412	rv = nfsd_set_nrthreads(i, nthreads);
	413	if (rv)
	414	goto out_free;
	415	}
	416
	417	rv = nfsd_get_nrthreads(npools, nthreads);
	418	if (rv)
	419	goto out_free;
	420
	421	mesg = buf;
	422	size = SIMPLE_TRANSACTION_LIMIT;
	423	for (i = 0; i < npools && size > 0; i++) {
	424	snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
	425	len = strlen(mesg);
	426	size -= len;
	427	mesg += len;
	428	}
	429
	430	return (mesg-buf);
	431
	432	out_free:
	433	kfree(nthreads);
	434	return rv;
435	}
436
70c3b76c N	437	static ssize_t write_versions(struct file file, char buf, size_t size)
	438	{
	439	/*
	440	* Format:
	441	* [-/+]vers [-/+]vers ...
	442	*/
	443	char *mesg = buf;
	444	char *vers, sign;
	445	int len, num;
	446	ssize_t tlen = 0;
	447	char *sep;
	448
	449	if (size>0) {
	450	if (nfsd_serv)
6658d3a7 N	451	/* Cannot change versions without updating
	452	* nfsd_serv->sv_xdrsize, and reallocing
	453	* rq_argp and rq_resp
	454	*/
70c3b76c N	455	return -EBUSY;
	456	if (buf[size-1] != '\n')
	457	return -EINVAL;
	458	buf[size-1] = 0;
	459
	460	vers = mesg;
	461	len = qword_get(&mesg, vers, size);
	462	if (len <= 0) return -EINVAL;
	463	do {
	464	sign = *vers;
	465	if (sign == '+' \|\| sign == '-')
	466	num = simple_strtol((vers+1), NULL, 0);
	467	else
	468	num = simple_strtol(vers, NULL, 0);
	469	switch(num) {
	470	case 2:
	471	case 3:
	472	case 4:
6658d3a7	473	nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
70c3b76c N	474	break;
	475	default:
	476	return -EINVAL;
	477	}
	478	vers += len + 1;
	479	tlen += len;
	480	} while ((len = qword_get(&mesg, vers, size)) > 0);
	481	/* If all get turned off, turn them back on, as
	482	* having no versions is BAD
	483	*/
6658d3a7	484	nfsd_reset_versions();
70c3b76c N	485	}
	486	/* Now write current state into reply buffer */
	487	len = 0;
	488	sep = "";
	489	for (num=2 ; num <= 4 ; num++)
6658d3a7	490	if (nfsd_vers(num, NFSD_AVAIL)) {
70c3b76c	491	len += sprintf(buf+len, "%s%c%d", sep,
6658d3a7	492	nfsd_vers(num, NFSD_TEST)?'+':'-',
70c3b76c N	493	num);
	494	sep = " ";
	495	}
	496	len += sprintf(buf+len, "\n");
	497	return len;
	498	}
	499
80212d59 N	500	static ssize_t write_ports(struct file file, char buf, size_t size)
80212d59 N	501	{
b41b66d6 N	502	if (size == 0) {
	503	int len = 0;
	504	lock_kernel();
	505	if (nfsd_serv)
	506	len = svc_sock_names(buf, nfsd_serv, NULL);
	507	unlock_kernel();
	508	return len;
	509	}
	510	/* Either a single 'fd' number is written, in which
	511	* case it must be for a socket of a supported family/protocol,
	512	* and we use it as an nfsd socket, or
	513	* A '-' followed by the 'name' of a socket in which case
	514	* we close the socket.
80212d59	515	*/
b41b66d6 N	516	if (isdigit(buf[0])) {
	517	char *mesg = buf;
	518	int fd;
	519	int err;
	520	err = get_int(&mesg, &fd);
	521	if (err)
	522	return -EINVAL;
	523	if (fd < 0)
	524	return -EINVAL;
	525	err = nfsd_create_serv();
	526	if (!err) {
	527	int proto = 0;
5680c446 N	528	err = svc_addsock(nfsd_serv, fd, buf, &proto);
	529	if (err >= 0) {
	530	err = lockd_up(proto);
	531	if (err < 0)
	532	svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf);
3dfb4210	533	}
b41b66d6 N	534	/* Decrease the count, but don't shutdown the
	535	* the service
	536	*/
cda9e0cd	537	lock_kernel();
b41b66d6	538	nfsd_serv->sv_nrthreads--;
cda9e0cd	539	unlock_kernel();
b41b66d6	540	}
5680c446	541	return err < 0 ? err : 0;
b41b66d6 N	542	}
	543	if (buf[0] == '-') {
	544	char *toclose = kstrdup(buf+1, GFP_KERNEL);
	545	int len = 0;
	546	if (!toclose)
	547	return -ENOMEM;
	548	lock_kernel();
	549	if (nfsd_serv)
	550	len = svc_sock_names(buf, nfsd_serv, toclose);
	551	unlock_kernel();
37a03472 N	552	if (len >= 0)
37a03472 N	553	lockd_down();
b41b66d6 N	554	kfree(toclose);
	555	return len;
	556	}
	557	return -EINVAL;
80212d59 N	558	}
80212d59 N	559
596bbe53 N	560	int nfsd_max_blksize;
	561
	562	static ssize_t write_maxblksize(struct file file, char buf, size_t size)
	563	{
	564	char *mesg = buf;
	565	if (size > 0) {
	566	int bsize;
	567	int rv = get_int(&mesg, &bsize);
	568	if (rv)
	569	return rv;
	570	/* force bsize into allowed range and
	571	* required alignment.
	572	*/
	573	if (bsize < 1024)
	574	bsize = 1024;
	575	if (bsize > NFSSVC_MAXBLKSIZE)
	576	bsize = NFSSVC_MAXBLKSIZE;
	577	bsize &= ~(1024-1);
	578	lock_kernel();
	579	if (nfsd_serv && nfsd_serv->sv_nrthreads) {
	580	unlock_kernel();
	581	return -EBUSY;
	582	}
	583	nfsd_max_blksize = bsize;
	584	unlock_kernel();
	585	}
	586	return sprintf(buf, "%d\n", nfsd_max_blksize);
	587	}
	588
70c3b76c	589	#ifdef CONFIG_NFSD_V4
1da177e4 LT	590	extern time_t nfs4_leasetime(void);
	591
	592	static ssize_t write_leasetime(struct file file, char buf, size_t size)
	593	{
	594	/* if size > 10 seconds, call
	595	* nfs4_reset_lease() then write out the new lease (seconds) as reply
	596	*/
	597	char *mesg = buf;
	598	int rv;
	599
	600	if (size > 0) {
	601	int lease;
	602	rv = get_int(&mesg, &lease);
	603	if (rv)
	604	return rv;
	605	if (lease < 10 \|\| lease > 3600)
	606	return -EINVAL;
	607	nfs4_reset_lease(lease);
	608	}
	609	sprintf(buf, "%ld\n", nfs4_lease_time());
	610	return strlen(buf);
	611	}
	612
0964a3d3 N	613	static ssize_t write_recoverydir(struct file file, char buf, size_t size)
	614	{
	615	char *mesg = buf;
	616	char *recdir;
	617	int len, status;
	618
	619	if (size > PATH_MAX \|\| buf[size-1] != '\n')
	620	return -EINVAL;
	621	buf[size-1] = 0;
	622
	623	recdir = mesg;
	624	len = qword_get(&mesg, recdir, size);
	625	if (len <= 0)
	626	return -EINVAL;
	627
	628	status = nfs4_reset_recoverydir(recdir);
	629	return strlen(buf);
	630	}
70c3b76c	631	#endif
0964a3d3	632
1da177e4 LT	633	/----------------------------------------------------------------------------/
	634	/*
	635	* populating the filesystem.
	636	*/
	637
	638	static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
	639	{
	640	static struct tree_descr nfsd_files[] = {
	641	[NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
	642	[NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
	643	[NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
	644	[NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
	645	[NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
	646	[NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR\|S_IRUSR},
	647	[NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR\|S_IRUSR},
	648	[NFSD_List] = {"exports", &exports_operations, S_IRUGO},
	649	[NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR\|S_IRUSR},
	650	[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR\|S_IRUSR},
eed2965a	651	[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR\|S_IRUSR},
70c3b76c	652	[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR\|S_IRUSR},
80212d59	653	[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR\|S_IRUGO},
596bbe53	654	[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR\|S_IRUGO},
1da177e4 LT	655	#ifdef CONFIG_NFSD_V4
1da177e4 LT	656	[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR\|S_IRUSR},
0964a3d3	657	[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR\|S_IRUSR},
1da177e4 LT	658	#endif
	659	/* last one */ {""}
	660	};
	661	return simple_fill_super(sb, 0x6e667364, nfsd_files);
	662	}
	663
454e2398 DH	664	static int nfsd_get_sb(struct file_system_type *fs_type,
454e2398 DH	665	int flags, const char dev_name, void data, struct vfsmount *mnt)
1da177e4	666	{
454e2398	667	return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
1da177e4 LT	668	}
	669
	670	static struct file_system_type nfsd_fs_type = {
	671	.owner = THIS_MODULE,
	672	.name = "nfsd",
	673	.get_sb = nfsd_get_sb,
	674	.kill_sb = kill_litter_super,
	675	};
	676
	677	static int __init init_nfsd(void)
	678	{
	679	int retval;
	680	printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
	681
	682	nfsd_stat_init(); /* Statistics */
	683	nfsd_cache_init(); /* RPC reply cache */
	684	nfsd_export_init(); /* Exports table */
	685	nfsd_lockd_init(); /* lockd->nfsd callbacks */
ac4d8ff2	686	nfs4_state_init(); /* NFSv4 locking state */
1da177e4	687	nfsd_idmap_init(); /* Name to ID mapping */
1da177e4 LT	688	if (proc_mkdir("fs/nfs", NULL)) {
	689	struct proc_dir_entry *entry;
	690	entry = create_proc_entry("fs/nfs/exports", 0, NULL);
	691	if (entry)
	692	entry->proc_fops = &exports_operations;
	693	}
	694	retval = register_filesystem(&nfsd_fs_type);
	695	if (retval) {
	696	nfsd_export_shutdown();
	697	nfsd_cache_shutdown();
	698	remove_proc_entry("fs/nfs/exports", NULL);
	699	remove_proc_entry("fs/nfs", NULL);
	700	nfsd_stat_shutdown();
	701	nfsd_lockd_shutdown();
	702	}
	703	return retval;
	704	}
	705
	706	static void __exit exit_nfsd(void)
	707	{
	708	nfsd_export_shutdown();
	709	nfsd_cache_shutdown();
	710	remove_proc_entry("fs/nfs/exports", NULL);
	711	remove_proc_entry("fs/nfs", NULL);
	712	nfsd_stat_shutdown();
	713	nfsd_lockd_shutdown();
1da177e4	714	nfsd_idmap_shutdown();
1da177e4 LT	715	unregister_filesystem(&nfsd_fs_type);
	716	}
	717
	718	MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
	719	MODULE_LICENSE("GPL");
	720	module_init(init_nfsd)
	721	module_exit(exit_nfsd)