1config NFS_FS 2 tristate "NFS client support" 3 depends on INET && FILE_LOCKING 4 select LOCKD 5 select SUNRPC 6 select NFS_ACL_SUPPORT if NFS_V3_ACL 7 help 8 Choose Y here if you want to access files residing on other 9 computers using Sun's Network File System protocol. To compile 10 this file system support as a module, choose M here: the module 11 will be called nfs. 12 13 To mount file systems exported by NFS servers, you also need to 14 install the user space mount.nfs command which can be found in 15 the Linux nfs-utils package, available from http://linux-nfs.org/. 16 Information about using the mount command is available in the 17 mount(8) man page. More detail about the Linux NFS client 18 implementation is available via the nfs(5) man page. 19 20 Below you can choose which versions of the NFS protocol are 21 available in the kernel to mount NFS servers. Support for NFS 22 version 2 (RFC 1094) is always available when NFS_FS is selected. 23 24 To configure a system which mounts its root file system via NFS 25 at boot time, say Y here, select "Kernel level IP 26 autoconfiguration" in the NETWORK menu, and select "Root file 27 system on NFS" below. You cannot compile this file system as a 28 module in this case. 29 30 If unsure, say N. 31 32config NFS_V3 33 bool "NFS client support for NFS version 3" 34 depends on NFS_FS 35 help 36 This option enables support for version 3 of the NFS protocol 37 (RFC 1813) in the kernel's NFS client. 38 39 If unsure, say Y. 40 41config NFS_V3_ACL 42 bool "NFS client support for the NFSv3 ACL protocol extension" 43 depends on NFS_V3 44 help 45 Some NFS servers support an auxiliary NFSv3 ACL protocol that 46 Sun added to Solaris but never became an official part of the 47 NFS version 3 protocol. This protocol extension allows 48 applications on NFS clients to manipulate POSIX Access Control 49 Lists on files residing on NFS servers. NFS servers enforce 50 ACLs on local files whether this protocol is available or not. 51 52 Choose Y here if your NFS server supports the Solaris NFSv3 ACL 53 protocol extension and you want your NFS client to allow 54 applications to access and modify ACLs on files on the server. 55 56 Most NFS servers don't support the Solaris NFSv3 ACL protocol 57 extension. You can choose N here or specify the "noacl" mount 58 option to prevent your NFS client from trying to use the NFSv3 59 ACL protocol. 60 61 If unsure, say N. 62 63config NFS_V4 64 bool "NFS client support for NFS version 4" 65 depends on NFS_FS 66 select SUNRPC_GSS 67 help 68 This option enables support for version 4 of the NFS protocol 69 (RFC 3530) in the kernel's NFS client. 70 71 To mount NFS servers using NFSv4, you also need to install user 72 space programs which can be found in the Linux nfs-utils package, 73 available from http://linux-nfs.org/. 74 75 If unsure, say Y. 76 77config NFS_V4_1 78 bool "NFS client support for NFSv4.1 (EXPERIMENTAL)" 79 depends on NFS_FS && NFS_V4 && EXPERIMENTAL 80 select PNFS_FILE_LAYOUT 81 help 82 This option enables support for minor version 1 of the NFSv4 protocol 83 (RFC 5661) in the kernel's NFS client. 84 85 If unsure, say N. 86 87config PNFS_FILE_LAYOUT 88 tristate 89 90config ROOT_NFS 91 bool "Root file system on NFS" 92 depends on NFS_FS=y && IP_PNP 93 help 94 If you want your system to mount its root file system via NFS, 95 choose Y here. This is common practice for managing systems 96 without local permanent storage. For details, read 97 <file:Documentation/filesystems/nfs/nfsroot.txt>. 98 99 Most people say N here. 100 101config NFS_FSCACHE 102 bool "Provide NFS client caching support" 103 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y 104 help 105 Say Y here if you want NFS data to be cached locally on disc through 106 the general filesystem cache manager 107 108config NFS_USE_LEGACY_DNS 109 bool "Use the legacy NFS DNS resolver" 110 depends on NFS_V4 111 help 112 The kernel now provides a method for translating a host name into an 113 IP address. Select Y here if you would rather use your own DNS 114 resolver script. 115 116 If unsure, say N 117 118config NFS_USE_KERNEL_DNS 119 bool 120 depends on NFS_V4 && !NFS_USE_LEGACY_DNS 121 select DNS_RESOLVER 122 select KEYS 123 default y 124 125config NFS_USE_NEW_IDMAPPER 126 bool "Use the new idmapper upcall routine" 127 depends on NFS_V4 && KEYS 128 help 129 Say Y here if you want NFS to use the new idmapper upcall functions. 130 You will need /sbin/request-key (usually provided by the keyutils 131 package). For details, read 132 <file:Documentation/filesystems/nfs/idmapper.txt>. 133 134 If you are unsure, say N. 135