[deliverable/linux.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/config.h>
#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/nfs.h>
#include <linux/nfsd_idmap.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/nfsd/interface.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_Leasetime,
	NFSD_RecoveryDir,
};

/*
 * 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_leasetime(struct file *file, char *buf, size_t size);
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);

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_Leasetime] = write_leasetime,
	[NFSD_RecoveryDir] = write_recoverydir,
};

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

	if (ino >= sizeof(write_op)/sizeof(write_op[0]) || !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 struct file_operations transaction_ops = {
	.write		= nfsctl_transaction_write,
	.read		= simple_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 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 + (int)&((struct knfsd_fh*)0)->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 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);
}

/*----------------------------------------------------------------------------*/
/*
 *	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},
#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 struct super_block *nfsd_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data)
{
	return get_sb_single(fs_type, flags, data, nfsd_fill_super);
}

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
	9	#include <linux/config.h>
	10	#include <linux/module.h>
	11
	12	#include <linux/linkage.h>
	13	#include <linux/time.h>
	14	#include <linux/errno.h>
	15	#include <linux/fs.h>
	16	#include <linux/fcntl.h>
	17	#include <linux/net.h>
	18	#include <linux/in.h>
	19	#include <linux/syscalls.h>
	20	#include <linux/unistd.h>
	21	#include <linux/slab.h>
	22	#include <linux/proc_fs.h>
	23	#include <linux/seq_file.h>
	24	#include <linux/pagemap.h>
	25	#include <linux/init.h>
	26
	27	#include <linux/nfs.h>
	28	#include <linux/nfsd_idmap.h>
	29	#include <linux/sunrpc/svc.h>
	30	#include <linux/nfsd/nfsd.h>
	31	#include <linux/nfsd/cache.h>
	32	#include <linux/nfsd/xdr.h>
	33	#include <linux/nfsd/syscall.h>
	34	#include <linux/nfsd/interface.h>
	35
	36	#include <asm/uaccess.h>
	37
	38	/*
	39	* We have a single directory with 9 nodes in it.
	40	*/
	41	enum {
	42	NFSD_Root = 1,
	43	NFSD_Svc,
	44	NFSD_Add,
	45	NFSD_Del,
	46	NFSD_Export,
	47	NFSD_Unexport,
	48	NFSD_Getfd,
	49	NFSD_Getfs,
	50	NFSD_List,
	51	NFSD_Fh,
	52	NFSD_Threads,
	53	NFSD_Leasetime,
0964a3d3	54	NFSD_RecoveryDir,
1da177e4 LT	55	};
	56
	57	/*
	58	* write() for these nodes.
	59	*/
	60	static ssize_t write_svc(struct file file, char buf, size_t size);
	61	static ssize_t write_add(struct file file, char buf, size_t size);
	62	static ssize_t write_del(struct file file, char buf, size_t size);
	63	static ssize_t write_export(struct file file, char buf, size_t size);
	64	static ssize_t write_unexport(struct file file, char buf, size_t size);
	65	static ssize_t write_getfd(struct file file, char buf, size_t size);
	66	static ssize_t write_getfs(struct file file, char buf, size_t size);
	67	static ssize_t write_filehandle(struct file file, char buf, size_t size);
	68	static ssize_t write_threads(struct file file, char buf, size_t size);
	69	static ssize_t write_leasetime(struct file file, char buf, size_t size);
0964a3d3	70	static ssize_t write_recoverydir(struct file file, char buf, size_t size);
1da177e4 LT	71
	72	static ssize_t (write_op[])(struct file , char *, size_t) = {
	73	[NFSD_Svc] = write_svc,
	74	[NFSD_Add] = write_add,
	75	[NFSD_Del] = write_del,
	76	[NFSD_Export] = write_export,
	77	[NFSD_Unexport] = write_unexport,
	78	[NFSD_Getfd] = write_getfd,
	79	[NFSD_Getfs] = write_getfs,
	80	[NFSD_Fh] = write_filehandle,
	81	[NFSD_Threads] = write_threads,
	82	[NFSD_Leasetime] = write_leasetime,
0964a3d3	83	[NFSD_RecoveryDir] = write_recoverydir,
1da177e4 LT	84	};
	85
	86	static ssize_t nfsctl_transaction_write(struct file file, const char __user buf, size_t size, loff_t *pos)
	87	{
	88	ino_t ino = file->f_dentry->d_inode->i_ino;
	89	char *data;
	90	ssize_t rv;
	91
	92	if (ino >= sizeof(write_op)/sizeof(write_op[0]) \|\| !write_op[ino])
	93	return -EINVAL;
	94
	95	data = simple_transaction_get(file, buf, size);
	96	if (IS_ERR(data))
	97	return PTR_ERR(data);
	98
	99	rv = write_op[ino](file, data, size);
	100	if (rv>0) {
	101	simple_transaction_set(file, rv);
	102	rv = size;
	103	}
	104	return rv;
	105	}
	106
	107	static struct file_operations transaction_ops = {
	108	.write = nfsctl_transaction_write,
	109	.read = simple_transaction_read,
	110	.release = simple_transaction_release,
	111	};
	112
	113	extern struct seq_operations nfs_exports_op;
	114	static int exports_open(struct inode inode, struct file file)
	115	{
	116	return seq_open(file, &nfs_exports_op);
	117	}
	118
	119	static struct file_operations exports_operations = {
	120	.open = exports_open,
	121	.read = seq_read,
	122	.llseek = seq_lseek,
	123	.release = seq_release,
	124	};
	125
	126	/----------------------------------------------------------------------------/
	127	/*
	128	* payload - write methods
	129	* If the method has a response, the response should be put in buf,
	130	* and the length returned. Otherwise return 0 or and -error.
	131	*/
	132
	133	static ssize_t write_svc(struct file file, char buf, size_t size)
	134	{
	135	struct nfsctl_svc *data;
	136	if (size < sizeof(*data))
	137	return -EINVAL;
	138	data = (struct nfsctl_svc*) buf;
	139	return nfsd_svc(data->svc_port, data->svc_nthreads);
	140	}
	141
	142	static ssize_t write_add(struct file file, char buf, size_t size)
	143	{
	144	struct nfsctl_client *data;
	145	if (size < sizeof(*data))
	146	return -EINVAL;
	147	data = (struct nfsctl_client *)buf;
148	return exp_addclient(data);
149	}
150
151	static ssize_t write_del(struct file file, char buf, size_t size)
152	{
153	struct nfsctl_client *data;
154	if (size < sizeof(*data))
155	return -EINVAL;
156	data = (struct nfsctl_client *)buf;
157	return exp_delclient(data);
158	}
159
160	static ssize_t write_export(struct file file, char buf, size_t size)
161	{
162	struct nfsctl_export *data;
163	if (size < sizeof(*data))
164	return -EINVAL;
165	data = (struct nfsctl_export*)buf;
166	return exp_export(data);
167	}
168
169	static ssize_t write_unexport(struct file file, char buf, size_t size)
170	{
171	struct nfsctl_export *data;
172
173	if (size < sizeof(*data))
174	return -EINVAL;
175	data = (struct nfsctl_export*)buf;
176	return exp_unexport(data);
177	}
178
179	static ssize_t write_getfs(struct file file, char buf, size_t size)
180	{
181	struct nfsctl_fsparm *data;
182	struct sockaddr_in *sin;
183	struct auth_domain *clp;
184	int err = 0;
185	struct knfsd_fh *res;
186
187	if (size < sizeof(*data))
188	return -EINVAL;
189	data = (struct nfsctl_fsparm*)buf;
190	err = -EPROTONOSUPPORT;
191	if (data->gd_addr.sa_family != AF_INET)
192	goto out;
193	sin = (struct sockaddr_in *)&data->gd_addr;
194	if (data->gd_maxlen > NFS3_FHSIZE)
195	data->gd_maxlen = NFS3_FHSIZE;
196
197	res = (struct knfsd_fh*)buf;
198
199	exp_readlock();
200	if (!(clp = auth_unix_lookup(sin->sin_addr)))
201	err = -EPERM;
202	else {
203	err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
204	auth_domain_put(clp);
205	}
206	exp_readunlock();
207	if (err == 0)
208	err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
209	out:
210	return err;
211	}
212
213	static ssize_t write_getfd(struct file file, char buf, size_t size)
214	{
215	struct nfsctl_fdparm *data;
216	struct sockaddr_in *sin;
217	struct auth_domain *clp;
218	int err = 0;
219	struct knfsd_fh fh;
220	char *res;
221
222	if (size < sizeof(*data))
223	return -EINVAL;
224	data = (struct nfsctl_fdparm*)buf;
225	err = -EPROTONOSUPPORT;
226	if (data->gd_addr.sa_family != AF_INET)
227	goto out;
228	err = -EINVAL;
229	if (data->gd_version < 2 \|\| data->gd_version > NFSSVC_MAXVERS)
230	goto out;
231
232	res = buf;
233	sin = (struct sockaddr_in *)&data->gd_addr;
234	exp_readlock();
235	if (!(clp = auth_unix_lookup(sin->sin_addr)))
236	err = -EPERM;
237	else {
238	err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
239	auth_domain_put(clp);
240	}
241	exp_readunlock();
242
243	if (err == 0) {
244	memset(res,0, NFS_FHSIZE);
245	memcpy(res, &fh.fh_base, fh.fh_size);
246	err = NFS_FHSIZE;
247	}
248	out:
249	return err;
250	}
251
252	static ssize_t write_filehandle(struct file file, char buf, size_t size)
253	{
254	/* request is:
255	* domain path maxsize
256	* response is
257	* filehandle
258	*
259	* qword quoting is used, so filehandle will be \x....
260	*/
261	char dname, path;
262	int maxsize;
263	char *mesg = buf;
264	int len;
265	struct auth_domain *dom;
266	struct knfsd_fh fh;
267
268	if (buf[size-1] != '\n')
269	return -EINVAL;
270	buf[size-1] = 0;
271
272	dname = mesg;
273	len = qword_get(&mesg, dname, size);
274	if (len <= 0) return -EINVAL;
275
276	path = dname+len+1;
277	len = qword_get(&mesg, path, size);
278	if (len <= 0) return -EINVAL;
279
280	len = get_int(&mesg, &maxsize);
281	if (len)
282	return len;
283
284	if (maxsize < NFS_FHSIZE)
285	return -EINVAL;
286	if (maxsize > NFS3_FHSIZE)
287	maxsize = NFS3_FHSIZE;
288
289	if (qword_get(&mesg, mesg, size)>0)
290	return -EINVAL;
291
292	/* we have all the words, they are in buf.. */
293	dom = unix_domain_find(dname);
294	if (!dom)
295	return -ENOMEM;
296
297	len = exp_rootfh(dom, path, &fh, maxsize);
298	auth_domain_put(dom);
299	if (len)
300	return len;
301
302	mesg = buf; len = SIMPLE_TRANSACTION_LIMIT;
303	qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
304	mesg[-1] = '\n';
305	return mesg - buf;
306	}
307
308	extern int nfsd_nrthreads(void);
309
310	static ssize_t write_threads(struct file file, char buf, size_t size)
311	{
312	/* if size > 0, look for a number of threads and call nfsd_svc
313	* then write out number of threads as reply
314	*/
315	char *mesg = buf;
316	int rv;
317	if (size > 0) {
318	int newthreads;
319	rv = get_int(&mesg, &newthreads);
320	if (rv)
321	return rv;
322	if (newthreads <0)
323	return -EINVAL;
324	rv = nfsd_svc(2049, newthreads);
325	if (rv)
326	return rv;
327	}
328	sprintf(buf, "%d\n", nfsd_nrthreads());
329	return strlen(buf);
330	}
331
332	extern time_t nfs4_leasetime(void);
333
334	static ssize_t write_leasetime(struct file file, char buf, size_t size)
335	{
336	/* if size > 10 seconds, call
337	* nfs4_reset_lease() then write out the new lease (seconds) as reply
338	*/
339	char *mesg = buf;
340	int rv;
341
342	if (size > 0) {
343	int lease;
344	rv = get_int(&mesg, &lease);
345	if (rv)
346	return rv;
347	if (lease < 10 \|\| lease > 3600)
348	return -EINVAL;
349	nfs4_reset_lease(lease);
350	}
351	sprintf(buf, "%ld\n", nfs4_lease_time());
352	return strlen(buf);
353	}
354
0964a3d3 N	355	static ssize_t write_recoverydir(struct file file, char buf, size_t size)
	356	{
	357	char *mesg = buf;
	358	char *recdir;
	359	int len, status;
	360
	361	if (size > PATH_MAX \|\| buf[size-1] != '\n')
	362	return -EINVAL;
	363	buf[size-1] = 0;
	364
	365	recdir = mesg;
	366	len = qword_get(&mesg, recdir, size);
	367	if (len <= 0)
	368	return -EINVAL;
	369
	370	status = nfs4_reset_recoverydir(recdir);
	371	return strlen(buf);
	372	}
	373
1da177e4 LT	374	/----------------------------------------------------------------------------/
	375	/*
	376	* populating the filesystem.
	377	*/
	378
	379	static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
	380	{
	381	static struct tree_descr nfsd_files[] = {
	382	[NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
	383	[NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
	384	[NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
	385	[NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
	386	[NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
	387	[NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR\|S_IRUSR},
	388	[NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR\|S_IRUSR},
	389	[NFSD_List] = {"exports", &exports_operations, S_IRUGO},
	390	[NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR\|S_IRUSR},
	391	[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR\|S_IRUSR},
	392	#ifdef CONFIG_NFSD_V4
	393	[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR\|S_IRUSR},
0964a3d3	394	[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR\|S_IRUSR},
1da177e4 LT	395	#endif
	396	/* last one */ {""}
	397	};
	398	return simple_fill_super(sb, 0x6e667364, nfsd_files);
	399	}
	400
	401	static struct super_block nfsd_get_sb(struct file_system_type fs_type,
	402	int flags, const char dev_name, void data)
	403	{
	404	return get_sb_single(fs_type, flags, data, nfsd_fill_super);
	405	}
	406
	407	static struct file_system_type nfsd_fs_type = {
	408	.owner = THIS_MODULE,
	409	.name = "nfsd",
	410	.get_sb = nfsd_get_sb,
	411	.kill_sb = kill_litter_super,
	412	};
	413
	414	static int __init init_nfsd(void)
	415	{
	416	int retval;
	417	printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
	418
	419	nfsd_stat_init(); /* Statistics */
	420	nfsd_cache_init(); /* RPC reply cache */
	421	nfsd_export_init(); /* Exports table */
	422	nfsd_lockd_init(); /* lockd->nfsd callbacks */
ac4d8ff2	423	nfs4_state_init(); /* NFSv4 locking state */
1da177e4	424	nfsd_idmap_init(); /* Name to ID mapping */
1da177e4 LT	425	if (proc_mkdir("fs/nfs", NULL)) {
	426	struct proc_dir_entry *entry;
	427	entry = create_proc_entry("fs/nfs/exports", 0, NULL);
	428	if (entry)
	429	entry->proc_fops = &exports_operations;
	430	}
	431	retval = register_filesystem(&nfsd_fs_type);
	432	if (retval) {
	433	nfsd_export_shutdown();
	434	nfsd_cache_shutdown();
	435	remove_proc_entry("fs/nfs/exports", NULL);
	436	remove_proc_entry("fs/nfs", NULL);
	437	nfsd_stat_shutdown();
	438	nfsd_lockd_shutdown();
	439	}
	440	return retval;
	441	}
	442
	443	static void __exit exit_nfsd(void)
	444	{
	445	nfsd_export_shutdown();
	446	nfsd_cache_shutdown();
	447	remove_proc_entry("fs/nfs/exports", NULL);
	448	remove_proc_entry("fs/nfs", NULL);
	449	nfsd_stat_shutdown();
	450	nfsd_lockd_shutdown();
1da177e4	451	nfsd_idmap_shutdown();
1da177e4 LT	452	unregister_filesystem(&nfsd_fs_type);
	453	}
	454
	455	MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
	456	MODULE_LICENSE("GPL");
	457	module_init(init_nfsd)
	458	module_exit(exit_nfsd)