1 // SPDX-License-Identifier: GPL-2.0-only
103 	ino_t ino =  file_inode(file)->i_ino;  in nfsctl_transaction_write()
108 		return -EINVAL;  in nfsctl_transaction_write()
124 	if (! file->private_data) {  in nfsctl_transaction_read()
126 		 * causes a 0-byte write so that the file can return  in nfsctl_transaction_read()
153 	seq = file->private_data;  in exports_net_open()
154 	seq->private = nn->svc_export_cache;  in exports_net_open()
160 	return exports_net_open(current->nsproxy->net_ns, file);  in exports_proc_open()
172 	return exports_net_open(inode->i_sb->s_fs_info, file);  in exports_nfsd_open()
211 /*----------------------------------------------------------------------------*/
213  * payload - write methods
218 	return file_inode(file)->i_sb->s_fs_info;  in netns()
222  * write_unlock_ip - Release all locks used by a client
227  *			buf:	'\n'-terminated C string containing a
233  *	On error:	return code is negative errno value
245 		return -EINVAL;  in write_unlock_ip()
247 	if (buf[size-1] != '\n')  in write_unlock_ip()
248 		return -EINVAL;  in write_unlock_ip()
252 		return -EINVAL;  in write_unlock_ip()
255 		return -EINVAL;  in write_unlock_ip()
261  * write_unlock_fs - Release all locks on a local file system
266  *			buf:	'\n'-terminated C string containing the
272  *	On error:	return code is negative errno value
282 		return -EINVAL;  in write_unlock_fs()
284 	if (buf[size-1] != '\n')  in write_unlock_fs()
285 		return -EINVAL;  in write_unlock_fs()
289 		return -EINVAL;  in write_unlock_fs()
304 	error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);  in write_unlock_fs()
311  * write_filehandle - Get a variable-length NFS file handle by path
313  * On input, the buffer contains a '\n'-terminated C string comprised of
325  *	On success:	passed-in buffer filled with '\n'-terminated C
329  *	On error:	return code is negative errno value
341 		return -EINVAL;  in write_filehandle()
343 	if (buf[size-1] != '\n')  in write_filehandle()
344 		return -EINVAL;  in write_filehandle()
345 	buf[size-1] = 0;  in write_filehandle()
350 		return -EINVAL;  in write_filehandle()
355 		return -EINVAL;  in write_filehandle()
362 		return -EINVAL;  in write_filehandle()
366 		return -EINVAL;  in write_filehandle()
371 		return -ENOMEM;  in write_filehandle()
381 	mesg[-1] = '\n';  in write_filehandle()
382 	return mesg - buf;  in write_filehandle()
386  * write_threads - Start NFSD, or report the current number of running threads
392  *	On success:	passed-in buffer filled with '\n'-terminated C
404  *			size:		non-zero length of C string in @buf
407  *			passed-in buffer filled with '\n'-terminated C
411  *	On error:	return code is zero or a negative errno value
425 			return -EINVAL;  in write_threads()
426 		rv = nfsd_svc(newthreads, net, file->f_cred);  in write_threads()
436  * write_pool_threads - Set or report the current number of threads per pool
445  * 			buf:		C string containing whitespace-
449  *			size:		non-zero length of C string in @buf
451  *	On success:	passed-in buffer filled with '\n'-terminated C
455  *	On error:	return code is zero or a negative errno value
484 	rv = -ENOMEM;  in write_pool_threads()
491 			if (rv == -ENOENT)  in write_pool_threads()
495 			rv = -EINVAL;  in write_pool_threads()
511 		snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));  in write_pool_threads()
513 		size -= len;  in write_pool_threads()
516 	rv = mesg - buf;  in write_pool_threads()
537 		 * +4, unless -4.0 is present.  in nfsd_print_version_support()
541 			supported ? '+' : '-', vers, minor);  in nfsd_print_version_support()
554 		if (nn->nfsd_serv)  in __write_versions()
556 			 * nn->nfsd_serv->sv_xdrsize, and reallocing  in __write_versions()
559 			return -EBUSY;  in __write_versions()
560 		if (buf[size-1] != '\n')  in __write_versions()
561 			return -EINVAL;  in __write_versions()
562 		buf[size-1] = 0;  in __write_versions()
566 		if (len <= 0) return -EINVAL;  in __write_versions()
571 			if (sign == '+' || sign == '-')  in __write_versions()
577 					return -EINVAL;  in __write_versions()
579 					return -EINVAL;  in __write_versions()
582 			cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET;  in __write_versions()
591 						return -EINVAL;  in __write_versions()
595 					 * or we have -4 and at least one minor is enabled.  in __write_versions()
604 				return -EINVAL;  in __write_versions()
622 		minor = -1;  in __write_versions()
628 			remaining -= len;  in __write_versions()
639 		return -EINVAL;  in __write_versions()
644  * write_versions - Set or report the available NFS protocol versions
650  *	On success:	passed-in buffer filled with '\n'-terminated C
651  *			string containing positive or negative integer
655  *	On error:	return code is zero or a negative errno value
660  * 			buf:		C string containing whitespace-
661  * 					separated positive or negative
664  * 					or disable ("-n")
665  *			size:		non-zero length of C string in @buf
668  *			been updated; passed-in buffer filled with
669  *			'\n'-terminated C string containing positive
670  *			or negative integer values representing the
673  *	On error:	return code is zero or a negative errno value
686  * Zero-length write.  Return a list of NFSD's current listener
693 	if (nn->nfsd_serv == NULL)  in __write_ports_names()
695 	return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);  in __write_ports_names()
711 		return -EINVAL;  in __write_ports_addfd()
715 		return -EINVAL;  in __write_ports_addfd()
722 	err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);  in __write_ports_addfd()
725 	    !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1))  in __write_ports_addfd()
726 		svc_get(nn->nfsd_serv);  in __write_ports_addfd()
744 		return -EINVAL;  in __write_ports_addxprt()
747 		return -EINVAL;  in __write_ports_addxprt()
753 	err = svc_xprt_create(nn->nfsd_serv, transport, net,  in __write_ports_addxprt()
758 	err = svc_xprt_create(nn->nfsd_serv, transport, net,  in __write_ports_addxprt()
760 	if (err < 0 && err != -EAFNOSUPPORT)  in __write_ports_addxprt()
763 	if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1))  in __write_ports_addxprt()
764 		svc_get(nn->nfsd_serv);  in __write_ports_addxprt()
769 	xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);  in __write_ports_addxprt()
786 		return __write_ports_addfd(buf, net, file->f_cred);  in __write_ports()
789 		return __write_ports_addxprt(buf, net, file->f_cred);  in __write_ports()
791 	return -EINVAL;  in __write_ports()
795  * write_ports - Pass a socket file descriptor or transport name to listen on
801  *	On success:	passed-in buffer filled with a '\n'-terminated C
802  *			string containing a whitespace-separated list of
805  *	On error:	return code is zero or a negative errno value
816  *			size:		non-zero length of C string in @buf
819  *			passed-in buffer filled with a '\n'-terminated C
823  *	On error:	return code is a negative errno value
832  *			size:		non-zero length of C string in @buf
835  *	On error:	return code is a negative errno value
851  * write_maxblksize - Set or report the current NFS blksize
863  *			size:		non-zero length of C string in @buf
865  *	On success:	passed-in buffer filled with '\n'-terminated C string
869  *	On error:	return code is zero or a negative errno value
886 		bsize &= ~(1024-1);  in write_maxblksize()
888 		if (nn->nfsd_serv) {  in write_maxblksize()
890 			return -EBUSY;  in write_maxblksize()
901  * write_maxconn - Set or report the current max number of connections
912  *			size:		non-zero length of C string in @buf
914  *	On success:	passed-in buffer filled with '\n'-terminated C string
918  *	On error:	return code is zero or a negative errno value
924 	unsigned int maxconn = nn->max_connections;  in write_maxconn()
931 		nn->max_connections = maxconn;  in write_maxconn()
945 		if (nn->nfsd_serv)  in __nfsd4_write_time()
946 			return -EBUSY;  in __nfsd4_write_time()
954 		 *	- Too short: the briefest network outage may  in __nfsd4_write_time()
957 		 *	- Too long: do you really want reboot recovery  in __nfsd4_write_time()
963 			return -EINVAL;  in __nfsd4_write_time()
982  * write_leasetime - Set or report the current NFSv4 lease time
994  *			size:		non-zero length of C string in @buf
996  *	On success:	passed-in buffer filled with '\n'-terminated C
1000  *	On error:	return code is zero or a negative errno value
1005 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);  in write_leasetime()
1009  * write_gracetime - Set or report current NFSv4 grace period time
1014  * lease-period time, but we don't try to enforce this.  (In the common
1021 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);  in write_gracetime()
1032 		if (nn->nfsd_serv)  in __write_recoverydir()
1033 			return -EBUSY;  in __write_recoverydir()
1034 		if (size > PATH_MAX || buf[size-1] != '\n')  in __write_recoverydir()
1035 			return -EINVAL;  in __write_recoverydir()
1036 		buf[size-1] = 0;  in __write_recoverydir()
1041 			return -EINVAL;  in __write_recoverydir()
1053  * write_recoverydir - Set or report the pathname of the recovery directory
1066  *			size:		non-zero length of C string in @buf
1068  *	On success:	passed-in buffer filled with '\n'-terminated C string
1071  *	On error:	return code is zero or a negative errno value
1085  * write_v4_end_grace - release grace period for nfsd's v4.x lock manager
1094  *			size:		non-zero length of C string in @buf
1096  *			passed-in buffer filled with "Y" or "N" with a newline
1097  *			and NULL-terminated C string. This indicates whether
1113 			if (!nn->nfsd_serv)  in write_v4_end_grace()
1114 				return -EBUSY;  in write_v4_end_grace()
1118 			return -EINVAL;  in write_v4_end_grace()
1123 			 nn->grace_ended ? 'Y' : 'N');  in write_v4_end_grace()
1128 /*----------------------------------------------------------------------------*/
1140 	inode->i_ino = iunique(sb, NFSD_MaxReserved);  in nfsd_get_inode()
1141 	inode->i_mode = mode;  in nfsd_get_inode()
1142 	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);  in nfsd_get_inode()
1145 		inode->i_fop = &simple_dir_operations;  in nfsd_get_inode()
1146 		inode->i_op = &simple_dir_inode_operations;  in nfsd_get_inode()
1159 	inode = nfsd_get_inode(dir->i_sb, mode);  in __nfsd_mkdir()
1161 		return -ENOMEM;  in __nfsd_mkdir()
1163 		inode->i_private = ncl;  in __nfsd_mkdir()
1164 		kref_get(&ncl->cl_ref);  in __nfsd_mkdir()
1174 	struct inode *dir = parent->d_inode;  in nfsd_mkdir()
1176 	int ret = -ENOMEM;  in nfsd_mkdir()
1196 	struct nfsdfs_client *ncl = inode->i_private;  in clear_ncl()
1198 	inode->i_private = NULL;  in clear_ncl()
1199 	kref_put(&ncl->cl_ref, ncl->cl_release);  in clear_ncl()
1204 	struct nfsdfs_client *nc = inode->i_private;  in __get_nfsdfs_client()
1207 		kref_get(&nc->cl_ref);  in __get_nfsdfs_client()
1238 	list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) {  in nfsdfs_remove_files()
1259 	for (i = 0; files->name && files->name[0]; i++, files++) {  in nfsdfs_create_files()
1260 		dentry = d_alloc_name(root, files->name);  in nfsdfs_create_files()
1263 		inode = nfsd_get_inode(d_inode(root)->i_sb,  in nfsdfs_create_files()
1264 					S_IFREG | files->mode);  in nfsdfs_create_files()
1269 		inode->i_fop = files->ops;  in nfsdfs_create_files()
1270 		inode->i_private = __get_nfsdfs_client(dir);  in nfsdfs_create_files()
1281 	return -ENOMEM;  in nfsdfs_create_files()
1296 	dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);  in nfsd_client_mkdir()
1310 	struct inode *dir = d_inode(dentry->d_parent);  in nfsd_client_rmdir()
1328 	struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,  in nfsd_fill_super()
1335 		/* Per-export io stats use same ops as exports file */  in nfsd_fill_super()
1370 	dentry = nfsd_mkdir(sb->s_root, NULL, "clients");  in nfsd_fill_super()
1373 	nn->nfsd_client_dir = dentry;  in nfsd_fill_super()
1379 	return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns));  in nfsd_fs_get_tree()
1384 	if (fc->s_fs_info)  in nfsd_fs_free_fc()
1385 		put_net(fc->s_fs_info);  in nfsd_fs_free_fc()
1395 	put_user_ns(fc->user_ns);  in nfsd_init_fs_context()
1396 	fc->user_ns = get_user_ns(fc->net_ns->user_ns);  in nfsd_init_fs_context()
1397 	fc->ops = &nfsd_fs_context_ops;  in nfsd_init_fs_context()
1403 	struct net *net = sb->s_fs_info;  in nfsd_umount()
1426 		return -ENOMEM;  in create_proc_exports_entry()
1430 		return -ENOMEM;  in create_proc_exports_entry()
1454 	nn->nfsd_versions = NULL;  in nfsd_init_net()
1455 	nn->nfsd4_minorversions = NULL;  in nfsd_init_net()
1462 	get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key));  in nfsd_init_net()
1463 	seqlock_init(&nn->writeverf_lock);  in nfsd_init_net()
1511 	nfsd_lockd_init();	/* lockd->nfsd callbacks */  in init_nfsd()