1 // SPDX-License-Identifier: GPL-2.0-only
100 	ino_t ino =  file_inode(file)->i_ino;  in nfsctl_transaction_write()
105 		return -EINVAL;  in nfsctl_transaction_write()
121 	if (! file->private_data) {  in nfsctl_transaction_read()
123 		 * causes a 0-byte write so that the file can return  in nfsctl_transaction_read()
150 	seq = file->private_data;  in exports_net_open()
151 	seq->private = nn->svc_export_cache;  in exports_net_open()
157 	return exports_net_open(current->nsproxy->net_ns, file);  in exports_proc_open()
169 	return exports_net_open(inode->i_sb->s_fs_info, file);  in exports_nfsd_open()
231 /*----------------------------------------------------------------------------*/
233  * payload - write methods
238 	return file_inode(file)->i_sb->s_fs_info;  in netns()
242  * write_unlock_ip - Release all locks used by a client
247  *			buf:	'\n'-terminated C string containing a
253  *	On error:	return code is negative errno value
265 		return -EINVAL;  in write_unlock_ip()
267 	if (buf[size-1] != '\n')  in write_unlock_ip()
268 		return -EINVAL;  in write_unlock_ip()
272 		return -EINVAL;  in write_unlock_ip()
275 		return -EINVAL;  in write_unlock_ip()
281  * write_unlock_fs - Release all locks on a local file system
286  *			buf:	'\n'-terminated C string containing the
292  *	On error:	return code is negative errno value
302 		return -EINVAL;  in write_unlock_fs()
304 	if (buf[size-1] != '\n')  in write_unlock_fs()
305 		return -EINVAL;  in write_unlock_fs()
309 		return -EINVAL;  in write_unlock_fs()
324 	error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);  in write_unlock_fs()
331  * write_filehandle - Get a variable-length NFS file handle by path
333  * On input, the buffer contains a '\n'-terminated C string comprised of
345  *	On success:	passed-in buffer filled with '\n'-terminated C
349  *	On error:	return code is negative errno value
361 		return -EINVAL;  in write_filehandle()
363 	if (buf[size-1] != '\n')  in write_filehandle()
364 		return -EINVAL;  in write_filehandle()
365 	buf[size-1] = 0;  in write_filehandle()
370 		return -EINVAL;  in write_filehandle()
375 		return -EINVAL;  in write_filehandle()
382 		return -EINVAL;  in write_filehandle()
386 		return -EINVAL;  in write_filehandle()
391 		return -ENOMEM;  in write_filehandle()
401 	mesg[-1] = '\n';  in write_filehandle()
402 	return mesg - buf;	  in write_filehandle()
406  * write_threads - Start NFSD, or report the current number of running threads
412  *	On success:	passed-in buffer filled with '\n'-terminated C
424  *			size:		non-zero length of C string in @buf
427  *			passed-in buffer filled with '\n'-terminated C
431  *	On error:	return code is zero or a negative errno value
445 			return -EINVAL;  in write_threads()
446 		rv = nfsd_svc(newthreads, net, file->f_cred);  in write_threads()
456  * write_pool_threads - Set or report the current number of threads per pool
465  * 			buf:		C string containing whitespace-
469  *			size:		non-zero length of C string in @buf
471  *	On success:	passed-in buffer filled with '\n'-terminated C
475  *	On error:	return code is zero or a negative errno value
504 	rv = -ENOMEM;  in write_pool_threads()
511 			if (rv == -ENOENT)  in write_pool_threads()
515 			rv = -EINVAL;  in write_pool_threads()
531 		snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));  in write_pool_threads()
533 		size -= len;  in write_pool_threads()
536 	rv = mesg - buf;  in write_pool_threads()
557 		 * +4, unless -4.0 is present.  in nfsd_print_version_support()
561 			supported ? '+' : '-', vers, minor);  in nfsd_print_version_support()
574 		if (nn->nfsd_serv)  in __write_versions()
576 			 * nn->nfsd_serv->sv_xdrsize, and reallocing  in __write_versions()
579 			return -EBUSY;  in __write_versions()
580 		if (buf[size-1] != '\n')  in __write_versions()
581 			return -EINVAL;  in __write_versions()
582 		buf[size-1] = 0;  in __write_versions()
586 		if (len <= 0) return -EINVAL;  in __write_versions()
591 			if (sign == '+' || sign == '-')  in __write_versions()
597 					return -EINVAL;  in __write_versions()
599 					return -EINVAL;  in __write_versions()
602 			cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET;  in __write_versions()
611 						return -EINVAL;  in __write_versions()
615 					 * or we have -4 and at least one minor is enabled.  in __write_versions()
624 				return -EINVAL;  in __write_versions()
643 		minor = -1;  in __write_versions()
649 			remaining -= len;  in __write_versions()
660 		return -EINVAL;  in __write_versions()
665  * write_versions - Set or report the available NFS protocol versions
671  *	On success:	passed-in buffer filled with '\n'-terminated C
672  *			string containing positive or negative integer
676  *	On error:	return code is zero or a negative errno value
681  * 			buf:		C string containing whitespace-
682  * 					separated positive or negative
685  * 					or disable ("-n")
686  *			size:		non-zero length of C string in @buf
689  *			been updated; passed-in buffer filled with
690  *			'\n'-terminated C string containing positive
691  *			or negative integer values representing the
694  *	On error:	return code is zero or a negative errno value
707  * Zero-length write.  Return a list of NFSD's current listener
714 	if (nn->nfsd_serv == NULL)  in __write_ports_names()
716 	return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);  in __write_ports_names()
732 		return -EINVAL;  in __write_ports_addfd()
736 		return -EINVAL;  in __write_ports_addfd()
743 	err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);  in __write_ports_addfd()
750 	nn->nfsd_serv->sv_nrthreads--;  in __write_ports_addfd()
766 		return -EINVAL;  in __write_ports_addxprt()
769 		return -EINVAL;  in __write_ports_addxprt()
775 	err = svc_create_xprt(nn->nfsd_serv, transport, net,  in __write_ports_addxprt()
780 	err = svc_create_xprt(nn->nfsd_serv, transport, net,  in __write_ports_addxprt()
782 	if (err < 0 && err != -EAFNOSUPPORT)  in __write_ports_addxprt()
786 	nn->nfsd_serv->sv_nrthreads--;  in __write_ports_addxprt()
789 	xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);  in __write_ports_addxprt()
806 		return __write_ports_addfd(buf, net, file->f_cred);  in __write_ports()
809 		return __write_ports_addxprt(buf, net, file->f_cred);  in __write_ports()
811 	return -EINVAL;  in __write_ports()
815  * write_ports - Pass a socket file descriptor or transport name to listen on
821  *	On success:	passed-in buffer filled with a '\n'-terminated C
822  *			string containing a whitespace-separated list of
825  *	On error:	return code is zero or a negative errno value
836  *			size:		non-zero length of C string in @buf
839  *			passed-in buffer filled with a '\n'-terminated C
843  *	On error:	return code is a negative errno value
852  *			size:		non-zero length of C string in @buf
855  *	On error:	return code is a negative errno value
871  * write_maxblksize - Set or report the current NFS blksize
883  *			size:		non-zero length of C string in @buf
885  *	On success:	passed-in buffer filled with '\n'-terminated C string
889  *	On error:	return code is zero or a negative errno value
906 		bsize &= ~(1024-1);  in write_maxblksize()
908 		if (nn->nfsd_serv) {  in write_maxblksize()
910 			return -EBUSY;  in write_maxblksize()
921  * write_maxconn - Set or report the current max number of connections
932  *			size:		non-zero length of C string in @buf
934  *	On success:	passed-in buffer filled with '\n'-terminated C string
938  *	On error:	return code is zero or a negative errno value
944 	unsigned int maxconn = nn->max_connections;  in write_maxconn()
951 		nn->max_connections = maxconn;  in write_maxconn()
965 		if (nn->nfsd_serv)  in __nfsd4_write_time()
966 			return -EBUSY;  in __nfsd4_write_time()
974 		 *	- Too short: the briefest network outage may  in __nfsd4_write_time()
977 		 *	- Too long: do you really want reboot recovery  in __nfsd4_write_time()
983 			return -EINVAL;  in __nfsd4_write_time()
1002  * write_leasetime - Set or report the current NFSv4 lease time
1014  *			size:		non-zero length of C string in @buf
1016  *	On success:	passed-in buffer filled with '\n'-terminated C
1020  *	On error:	return code is zero or a negative errno value
1025 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);  in write_leasetime()
1029  * write_gracetime - Set or report current NFSv4 grace period time
1034  * lease-period time, but we don't try to enforce this.  (In the common
1041 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);  in write_gracetime()
1052 		if (nn->nfsd_serv)  in __write_recoverydir()
1053 			return -EBUSY;  in __write_recoverydir()
1054 		if (size > PATH_MAX || buf[size-1] != '\n')  in __write_recoverydir()
1055 			return -EINVAL;  in __write_recoverydir()
1056 		buf[size-1] = 0;  in __write_recoverydir()
1061 			return -EINVAL;  in __write_recoverydir()
1073  * write_recoverydir - Set or report the pathname of the recovery directory
1086  *			size:		non-zero length of C string in @buf
1088  *	On success:	passed-in buffer filled with '\n'-terminated C string
1091  *	On error:	return code is zero or a negative errno value
1105  * write_v4_end_grace - release grace period for nfsd's v4.x lock manager
1114  *			size:		non-zero length of C string in @buf
1116  *			passed-in buffer filled with "Y" or "N" with a newline
1117  *			and NULL-terminated C string. This indicates whether
1133 			if (!nn->nfsd_serv)  in write_v4_end_grace()
1134 				return -EBUSY;  in write_v4_end_grace()
1138 			return -EINVAL;  in write_v4_end_grace()
1143 			 nn->grace_ended ? 'Y' : 'N');  in write_v4_end_grace()
1148 /*----------------------------------------------------------------------------*/
1160 	inode->i_ino = iunique(sb, NFSD_MaxReserved);  in nfsd_get_inode()
1161 	inode->i_mode = mode;  in nfsd_get_inode()
1162 	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);  in nfsd_get_inode()
1165 		inode->i_fop = &simple_dir_operations;  in nfsd_get_inode()
1166 		inode->i_op = &simple_dir_inode_operations;  in nfsd_get_inode()
1178 	inode = nfsd_get_inode(dir->i_sb, mode);  in __nfsd_mkdir()
1180 		return -ENOMEM;  in __nfsd_mkdir()
1182 		inode->i_private = ncl;  in __nfsd_mkdir()
1183 		kref_get(&ncl->cl_ref);  in __nfsd_mkdir()
1193 	struct inode *dir = parent->d_inode;  in nfsd_mkdir()
1195 	int ret = -ENOMEM;  in nfsd_mkdir()
1215 	struct nfsdfs_client *ncl = inode->i_private;  in clear_ncl()
1217 	inode->i_private = NULL;  in clear_ncl()
1218 	kref_put(&ncl->cl_ref, ncl->cl_release);  in clear_ncl()
1223 	struct nfsdfs_client *nc = inode->i_private;  in __get_nfsdfs_client()
1226 		kref_get(&nc->cl_ref);  in __get_nfsdfs_client()
1256 	list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) {  in nfsdfs_remove_files()
1276 	for (i = 0; files->name && files->name[0]; i++, files++) {  in nfsdfs_create_files()
1277 		if (!files->name)  in nfsdfs_create_files()
1279 		dentry = d_alloc_name(root, files->name);  in nfsdfs_create_files()
1282 		inode = nfsd_get_inode(d_inode(root)->i_sb,  in nfsdfs_create_files()
1283 					S_IFREG | files->mode);  in nfsdfs_create_files()
1288 		inode->i_fop = files->ops;  in nfsdfs_create_files()
1289 		inode->i_private = __get_nfsdfs_client(dir);  in nfsdfs_create_files()
1298 	return -ENOMEM;  in nfsdfs_create_files()
1312 	dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);  in nfsd_client_mkdir()
1326 	struct inode *dir = d_inode(dentry->d_parent);  in nfsd_client_rmdir()
1344 	struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,  in nfsd_fill_super()
1381 	dentry = nfsd_mkdir(sb->s_root, NULL, "clients");  in nfsd_fill_super()
1384 	nn->nfsd_client_dir = dentry;  in nfsd_fill_super()
1390 	return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns));  in nfsd_fs_get_tree()
1395 	if (fc->s_fs_info)  in nfsd_fs_free_fc()
1396 		put_net(fc->s_fs_info);  in nfsd_fs_free_fc()
1406 	put_user_ns(fc->user_ns);  in nfsd_init_fs_context()
1407 	fc->user_ns = get_user_ns(fc->net_ns->user_ns);  in nfsd_init_fs_context()
1408 	fc->ops = &nfsd_fs_context_ops;  in nfsd_init_fs_context()
1414 	struct net *net = sb->s_fs_info;  in nfsd_umount()
1436 	nn->nfsd_mnt = mnt;  in get_nfsdfs()
1447 		return -ENOMEM;  in create_proc_exports_entry()
1451 		return -ENOMEM;  in create_proc_exports_entry()
1475 	nn->nfsd_versions = NULL;  in nfsd_init_net()
1476 	nn->nfsd4_minorversions = NULL;  in nfsd_init_net()
1480 	nn->nfsd4_lease = 90;	/* default lease time */  in nfsd_init_net()
1481 	nn->nfsd4_grace = 90;  in nfsd_init_net()
1482 	nn->somebody_reclaimed = false;  in nfsd_init_net()
1483 	nn->track_reclaim_completes = false;  in nfsd_init_net()
1484 	nn->clverifier_counter = prandom_u32();  in nfsd_init_net()
1485 	nn->clientid_base = prandom_u32();  in nfsd_init_net()
1486 	nn->clientid_counter = nn->clientid_base + 1;  in nfsd_init_net()
1487 	nn->s2s_cp_cl_id = nn->clientid_counter++;  in nfsd_init_net()
1489 	atomic_set(&nn->ntf_refcnt, 0);  in nfsd_init_net()
1490 	init_waitqueue_head(&nn->ntf_wq);  in nfsd_init_net()
1491 	seqlock_init(&nn->boot_lock);  in nfsd_init_net()
1541 	nfsd_lockd_init();	/* lockd->nfsd callbacks */  in init_nfsd()