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(inode->i_sb->s_fs_info, file);  in exports_nfsd_open()
189 /*----------------------------------------------------------------------------*/
191  * payload - write methods
196 	return file_inode(file)->i_sb->s_fs_info;  in netns()
200  * write_unlock_ip - Release all locks used by a client
205  *			buf:	'\n'-terminated C string containing a
211  *	On error:	return code is negative errno value
223 		return -EINVAL;  in write_unlock_ip()
225 	if (buf[size-1] != '\n')  in write_unlock_ip()
226 		return -EINVAL;  in write_unlock_ip()
230 		return -EINVAL;  in write_unlock_ip()
233 		return -EINVAL;  in write_unlock_ip()
240  * write_unlock_fs - Release all locks on a local file system
245  *			buf:	'\n'-terminated C string containing the
251  *	On error:	return code is negative errno value
261 		return -EINVAL;  in write_unlock_fs()
263 	if (buf[size-1] != '\n')  in write_unlock_fs()
264 		return -EINVAL;  in write_unlock_fs()
268 		return -EINVAL;  in write_unlock_fs()
283 	error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);  in write_unlock_fs()
290  * write_filehandle - Get a variable-length NFS file handle by path
292  * On input, the buffer contains a '\n'-terminated C string comprised of
304  *	On success:	passed-in buffer filled with '\n'-terminated C
308  *	On error:	return code is negative errno value
320 		return -EINVAL;  in write_filehandle()
322 	if (buf[size-1] != '\n')  in write_filehandle()
323 		return -EINVAL;  in write_filehandle()
324 	buf[size-1] = 0;  in write_filehandle()
329 		return -EINVAL;  in write_filehandle()
334 		return -EINVAL;  in write_filehandle()
341 		return -EINVAL;  in write_filehandle()
345 		return -EINVAL;  in write_filehandle()
352 		return -ENOMEM;  in write_filehandle()
362 	mesg[-1] = '\n';  in write_filehandle()
363 	return mesg - buf;  in write_filehandle()
367  * write_threads - Start NFSD, or report the current number of running threads
373  *	On success:	passed-in buffer filled with '\n'-terminated C
385  *			size:		non-zero length of C string in @buf
388  *			passed-in buffer filled with '\n'-terminated C
392  *	On error:	return code is zero or a negative errno value
406 			return -EINVAL;  in write_threads()
408 		rv = nfsd_svc(newthreads, net, file->f_cred);  in write_threads()
418  * write_pool_threads - Set or report the current number of threads per pool
427  *			buf:		C string containing whitespace-
431  *			size:		non-zero length of C string in @buf
433  *	On success:	passed-in buffer filled with '\n'-terminated C
437  *	On error:	return code is zero or a negative errno value
466 	rv = -ENOMEM;  in write_pool_threads()
473 			if (rv == -ENOENT)  in write_pool_threads()
477 			rv = -EINVAL;  in write_pool_threads()
494 		snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));  in write_pool_threads()
496 		size -= len;  in write_pool_threads()
499 	rv = mesg - buf;  in write_pool_threads()
520 		 * +4, unless -4.0 is present.  in nfsd_print_version_support()
524 			supported ? '+' : '-', vers, minor);  in nfsd_print_version_support()
537 		if (nn->nfsd_serv)  in __write_versions()
539 			 * nn->nfsd_serv->sv_xdrsize, and reallocing  in __write_versions()
542 			return -EBUSY;  in __write_versions()
543 		if (buf[size-1] != '\n')  in __write_versions()
544 			return -EINVAL;  in __write_versions()
545 		buf[size-1] = 0;  in __write_versions()
550 		if (len <= 0) return -EINVAL;  in __write_versions()
555 			if (sign == '+' || sign == '-')  in __write_versions()
561 					return -EINVAL;  in __write_versions()
563 					return -EINVAL;  in __write_versions()
566 			cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET;  in __write_versions()
577 						return -EINVAL;  in __write_versions()
581 					 * or we have -4 and at least one minor is enabled.  in __write_versions()
590 				/* Ignore requests to disable non-existent versions */  in __write_versions()
592 					return -EINVAL;  in __write_versions()
610 		minor = -1;  in __write_versions()
616 			remaining -= len;  in __write_versions()
627 		return -EINVAL;  in __write_versions()
632  * write_versions - Set or report the available NFS protocol versions
638  *	On success:	passed-in buffer filled with '\n'-terminated C
639  *			string containing positive or negative integer
643  *	On error:	return code is zero or a negative errno value
648  *			buf:		C string containing whitespace-
649  *					separated positive or negative
652  *					or disable ("-n")
653  *			size:		non-zero length of C string in @buf
656  *			been updated; passed-in buffer filled with
657  *			'\n'-terminated C string containing positive
658  *			or negative integer values representing the
661  *	On error:	return code is zero or a negative errno value
674  * Zero-length write.  Return a list of NFSD's current listener
681 	if (nn->nfsd_serv == NULL)  in __write_ports_names()
683 	return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);  in __write_ports_names()
700 		return -EINVAL;  in __write_ports_addfd()
707 	serv = nn->nfsd_serv;  in __write_ports_addfd()
710 	if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks))  in __write_ports_addfd()
729 		return -EINVAL;  in __write_ports_addxprt()
732 		return -EINVAL;  in __write_ports_addxprt()
739 	serv = nn->nfsd_serv;  in __write_ports_addxprt()
747 	if (err < 0 && err != -EAFNOSUPPORT)  in __write_ports_addxprt()
758 	if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks))  in __write_ports_addxprt()
771 		return __write_ports_addfd(buf, net, file->f_cred);  in __write_ports()
774 		return __write_ports_addxprt(buf, net, file->f_cred);  in __write_ports()
776 	return -EINVAL;  in __write_ports()
780  * write_ports - Pass a socket file descriptor or transport name to listen on
786  *	On success:	passed-in buffer filled with a '\n'-terminated C
787  *			string containing a whitespace-separated list of
790  *	On error:	return code is zero or a negative errno value
801  *			size:		non-zero length of C string in @buf
804  *			passed-in buffer filled with a '\n'-terminated C
808  *	On error:	return code is a negative errno value
817  *			size:		non-zero length of C string in @buf
820  *	On error:	return code is a negative errno value
836  * write_maxblksize - Set or report the current NFS blksize
848  *			size:		non-zero length of C string in @buf
850  *	On success:	passed-in buffer filled with '\n'-terminated C string
854  *	On error:	return code is zero or a negative errno value
873 		bsize &= ~(1024-1);  in write_maxblksize()
875 		if (nn->nfsd_serv) {  in write_maxblksize()
877 			return -EBUSY;  in write_maxblksize()
888  * write_maxconn - Set or report the current max number of connections
899  *			size:		non-zero length of C string in @buf
901  *	On success:	passed-in buffer filled with '\n'-terminated C string
905  *	On error:	return code is zero or a negative errno value
911 	unsigned int maxconn = nn->max_connections;  in write_maxconn()
919 		nn->max_connections = maxconn;  in write_maxconn()
934 		if (nn->nfsd_serv)  in __nfsd4_write_time()
935 			return -EBUSY;  in __nfsd4_write_time()
939 		trace_nfsd_ctl_time(netns(file), dentry->d_name.name,  in __nfsd4_write_time()
940 				    dentry->d_name.len, i);  in __nfsd4_write_time()
946 		 *	- Too short: the briefest network outage may  in __nfsd4_write_time()
949 		 *	- Too long: do you really want reboot recovery  in __nfsd4_write_time()
955 			return -EINVAL;  in __nfsd4_write_time()
974  * write_leasetime - Set or report the current NFSv4 lease time
986  *			size:		non-zero length of C string in @buf
988  *	On success:	passed-in buffer filled with '\n'-terminated C
992  *	On error:	return code is zero or a negative errno value
997 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);  in write_leasetime()
1001  * write_gracetime - Set or report current NFSv4 grace period time
1006  * lease-period time, but we don't try to enforce this.  (In the common
1013 	return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);  in write_gracetime()
1025 		if (nn->nfsd_serv)  in __write_recoverydir()
1026 			return -EBUSY;  in __write_recoverydir()
1027 		if (size > PATH_MAX || buf[size-1] != '\n')  in __write_recoverydir()
1028 			return -EINVAL;  in __write_recoverydir()
1029 		buf[size-1] = 0;  in __write_recoverydir()
1034 			return -EINVAL;  in __write_recoverydir()
1047  * write_recoverydir - Set or report the pathname of the recovery directory
1060  *			size:		non-zero length of C string in @buf
1062  *	On success:	passed-in buffer filled with '\n'-terminated C string
1065  *	On error:	return code is zero or a negative errno value
1080  * write_v4_end_grace - release grace period for nfsd's v4.x lock manager
1089  *			size:		non-zero length of C string in @buf
1091  *			passed-in buffer filled with "Y" or "N" with a newline
1092  *			and NULL-terminated C string. This indicates whether
1108 			if (!nn->nfsd_serv)  in write_v4_end_grace()
1109 				return -EBUSY;  in write_v4_end_grace()
1114 			return -EINVAL;  in write_v4_end_grace()
1119 			 nn->grace_ended ? 'Y' : 'N');  in write_v4_end_grace()
1124 /*----------------------------------------------------------------------------*/
1136 	inode->i_ino = iunique(sb, NFSD_MaxReserved);  in nfsd_get_inode()
1137 	inode->i_mode = mode;  in nfsd_get_inode()
1141 		inode->i_fop = &simple_dir_operations;  in nfsd_get_inode()
1142 		inode->i_op = &simple_dir_inode_operations;  in nfsd_get_inode()
1146 		inode->i_op = &simple_symlink_inode_operations;  in nfsd_get_inode()
1158 	inode = nfsd_get_inode(dir->i_sb, mode);  in __nfsd_mkdir()
1160 		return -ENOMEM;  in __nfsd_mkdir()
1162 		inode->i_private = ncl;  in __nfsd_mkdir()
1163 		kref_get(&ncl->cl_ref);  in __nfsd_mkdir()
1173 	struct inode *dir = parent->d_inode;  in nfsd_mkdir()
1175 	int ret = -ENOMEM;  in nfsd_mkdir()
1199 	inode = nfsd_get_inode(dir->i_sb, mode);  in __nfsd_symlink()
1201 		return -ENOMEM;  in __nfsd_symlink()
1203 	inode->i_link = (char *)content;  in __nfsd_symlink()
1204 	inode->i_size = strlen(content);  in __nfsd_symlink()
1213  * @content is assumed to be a NUL-terminated string that lives
1219 	struct inode *dir = parent->d_inode;  in _nfsd_symlink()
1244 	struct nfsdfs_client *ncl = inode->i_private;  in clear_ncl()
1246 	spin_lock(&inode->i_lock);  in clear_ncl()
1247 	inode->i_private = NULL;  in clear_ncl()
1248 	spin_unlock(&inode->i_lock);  in clear_ncl()
1249 	kref_put(&ncl->cl_ref, ncl->cl_release);  in clear_ncl()
1256 	spin_lock(&inode->i_lock);  in get_nfsdfs_client()
1257 	nc = inode->i_private;  in get_nfsdfs_client()
1259 		kref_get(&nc->cl_ref);  in get_nfsdfs_client()
1260 	spin_unlock(&inode->i_lock);  in get_nfsdfs_client()
1277 	for (i = 0; files->name && files->name[0]; i++, files++) {  in nfsdfs_create_files()
1278 		dentry = d_alloc_name(root, files->name);  in nfsdfs_create_files()
1281 		inode = nfsd_get_inode(d_inode(root)->i_sb,  in nfsdfs_create_files()
1282 					S_IFREG | files->mode);  in nfsdfs_create_files()
1287 		kref_get(&ncl->cl_ref);  in nfsdfs_create_files()
1288 		inode->i_fop = files->ops;  in nfsdfs_create_files()
1289 		inode->i_private = ncl;  in nfsdfs_create_files()
1299 	return -ENOMEM;  in nfsdfs_create_files()
1314 	dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);  in nfsd_client_mkdir()
1333 	struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,  in nfsd_fill_super()
1340 		/* Per-export io stats use same ops as exports file */  in nfsd_fill_super()
1371 	_nfsd_symlink(sb->s_root, "supported_krb5_enctypes",  in nfsd_fill_super()
1373 	dentry = nfsd_mkdir(sb->s_root, NULL, "clients");  in nfsd_fill_super()
1376 	nn->nfsd_client_dir = dentry;  in nfsd_fill_super()
1382 	return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns));  in nfsd_fs_get_tree()
1387 	if (fc->s_fs_info)  in nfsd_fs_free_fc()
1388 		put_net(fc->s_fs_info);  in nfsd_fs_free_fc()
1398 	put_user_ns(fc->user_ns);  in nfsd_init_fs_context()
1399 	fc->user_ns = get_user_ns(fc->net_ns->user_ns);  in nfsd_init_fs_context()
1400 	fc->ops = &nfsd_fs_context_ops;  in nfsd_init_fs_context()
1406 	struct net *net = sb->s_fs_info;  in nfsd_umount()
1426 	return exports_net_open(current->nsproxy->net_ns, file);  in exports_proc_open()
1442 		return -ENOMEM;  in create_proc_exports_entry()
1446 		return -ENOMEM;  in create_proc_exports_entry()
1460  * nfsd_nl_rpc_status_get_start - Prepare rpc_status_get dumpit
1465  *   %-ENODEV: There is no NFSD running in this namespace
1469 	struct nfsd_net *nn = net_generic(sock_net(cb->skb->sk), nfsd_net_id);  in nfsd_nl_rpc_status_get_start()
1470 	int ret = -ENODEV;  in nfsd_nl_rpc_status_get_start()
1473 	if (nn->nfsd_serv)  in nfsd_nl_rpc_status_get_start()
1488 	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,  in nfsd_genl_rpc_status_compose_msg()
1491 		return -ENOBUFS;  in nfsd_genl_rpc_status_compose_msg()
1493 	if (nla_put_be32(skb, NFSD_A_RPC_STATUS_XID, rqstp->rq_xid) ||  in nfsd_genl_rpc_status_compose_msg()
1494 	    nla_put_u32(skb, NFSD_A_RPC_STATUS_FLAGS, rqstp->rq_flags) ||  in nfsd_genl_rpc_status_compose_msg()
1495 	    nla_put_u32(skb, NFSD_A_RPC_STATUS_PROG, rqstp->rq_prog) ||  in nfsd_genl_rpc_status_compose_msg()
1496 	    nla_put_u32(skb, NFSD_A_RPC_STATUS_PROC, rqstp->rq_proc) ||  in nfsd_genl_rpc_status_compose_msg()
1497 	    nla_put_u8(skb, NFSD_A_RPC_STATUS_VERSION, rqstp->rq_vers) ||  in nfsd_genl_rpc_status_compose_msg()
1499 			ktime_to_us(rqstp->rq_stime),  in nfsd_genl_rpc_status_compose_msg()
1501 		return -ENOBUFS;  in nfsd_genl_rpc_status_compose_msg()
1503 	switch (rqstp->rq_saddr.sa_family) {  in nfsd_genl_rpc_status_compose_msg()
1507 		s_in = (const struct sockaddr_in *)&rqstp->rq_saddr;  in nfsd_genl_rpc_status_compose_msg()
1508 		d_in = (const struct sockaddr_in *)&rqstp->rq_daddr;  in nfsd_genl_rpc_status_compose_msg()
1510 				    s_in->sin_addr.s_addr) ||  in nfsd_genl_rpc_status_compose_msg()
1512 				    d_in->sin_addr.s_addr) ||  in nfsd_genl_rpc_status_compose_msg()
1514 				 s_in->sin_port) ||  in nfsd_genl_rpc_status_compose_msg()
1516 				 d_in->sin_port))  in nfsd_genl_rpc_status_compose_msg()
1517 			return -ENOBUFS;  in nfsd_genl_rpc_status_compose_msg()
1523 		s_in = (const struct sockaddr_in6 *)&rqstp->rq_saddr;  in nfsd_genl_rpc_status_compose_msg()
1524 		d_in = (const struct sockaddr_in6 *)&rqstp->rq_daddr;  in nfsd_genl_rpc_status_compose_msg()
1526 				     &s_in->sin6_addr) ||  in nfsd_genl_rpc_status_compose_msg()
1528 				     &d_in->sin6_addr) ||  in nfsd_genl_rpc_status_compose_msg()
1530 				 s_in->sin6_port) ||  in nfsd_genl_rpc_status_compose_msg()
1532 				 d_in->sin6_port))  in nfsd_genl_rpc_status_compose_msg()
1533 			return -ENOBUFS;  in nfsd_genl_rpc_status_compose_msg()
1538 	for (i = 0; i < rqstp->rq_opcnt; i++)  in nfsd_genl_rpc_status_compose_msg()
1540 				rqstp->rq_opnum[i]))  in nfsd_genl_rpc_status_compose_msg()
1541 			return -ENOBUFS;  in nfsd_genl_rpc_status_compose_msg()
1548  * nfsd_nl_rpc_status_get_dumpit - Handle rpc_status_get dumpit
1552  * Returns the size of the reply or a negative errno.
1557 	struct nfsd_net *nn = net_generic(sock_net(skb->sk), nfsd_net_id);  in nfsd_nl_rpc_status_get_dumpit()
1562 	for (i = 0; i < nn->nfsd_serv->sv_nrpools; i++) {  in nfsd_nl_rpc_status_get_dumpit()
1565 		if (i < cb->args[0]) /* already consumed */  in nfsd_nl_rpc_status_get_dumpit()
1570 				&nn->nfsd_serv->sv_pools[i].sp_all_threads,  in nfsd_nl_rpc_status_get_dumpit()
1575 			if (rqstp_index++ < cb->args[1]) /* already consumed */  in nfsd_nl_rpc_status_get_dumpit()
1584 				smp_load_acquire(&rqstp->rq_status_counter);  in nfsd_nl_rpc_status_get_dumpit()
1588 			genl_rqstp.rq_xid = rqstp->rq_xid;  in nfsd_nl_rpc_status_get_dumpit()
1589 			genl_rqstp.rq_flags = rqstp->rq_flags;  in nfsd_nl_rpc_status_get_dumpit()
1590 			genl_rqstp.rq_vers = rqstp->rq_vers;  in nfsd_nl_rpc_status_get_dumpit()
1591 			genl_rqstp.rq_prog = rqstp->rq_prog;  in nfsd_nl_rpc_status_get_dumpit()
1592 			genl_rqstp.rq_proc = rqstp->rq_proc;  in nfsd_nl_rpc_status_get_dumpit()
1593 			genl_rqstp.rq_stime = rqstp->rq_stime;  in nfsd_nl_rpc_status_get_dumpit()
1601 			if (rqstp->rq_vers == NFS4_VERSION &&  in nfsd_nl_rpc_status_get_dumpit()
1602 			    rqstp->rq_proc == NFSPROC4_COMPOUND) {  in nfsd_nl_rpc_status_get_dumpit()
1607 				args = rqstp->rq_argp;  in nfsd_nl_rpc_status_get_dumpit()
1608 				genl_rqstp.rq_opcnt = args->opcnt;  in nfsd_nl_rpc_status_get_dumpit()
1611 						args->ops[j].opnum;  in nfsd_nl_rpc_status_get_dumpit()
1619 			if (smp_load_acquire(&rqstp->rq_status_counter) !=  in nfsd_nl_rpc_status_get_dumpit()
1630 	cb->args[0] = i;  in nfsd_nl_rpc_status_get_dumpit()
1631 	cb->args[1] = rqstp_index;  in nfsd_nl_rpc_status_get_dumpit()
1632 	ret = skb->len;  in nfsd_nl_rpc_status_get_dumpit()
1640  * nfsd_nl_rpc_status_get_done - rpc_status_get dumpit post-processing
1654  * nfsd_net_init - Prepare the nfsd_net portion of a new net namespace
1655  * @net: a freshly-created network namespace
1661  * Returns zero on success, or a negative errno otherwise.
1677 	nn->nfsd_versions = NULL;  in nfsd_net_init()
1678 	nn->nfsd4_minorversions = NULL;  in nfsd_net_init()
1680 	get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key));  in nfsd_net_init()
1681 	seqlock_init(&nn->writeverf_lock);  in nfsd_net_init()
1694  * nfsd_net_exit - Release the nfsd_net portion of a net namespace
1731 	nfsd_lockd_init();	/* lockd->nfsd callbacks */  in init_nfsd()
1790 MODULE_DESCRIPTION("In-kernel NFS server");