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 SUNRPC_BACKCHANNEL 81 select PNFS_FILE_LAYOUT 82 help 83 This option enables support for minor version 1 of the NFSv4 protocol 84 (RFC 5661) in the kernel's NFS client. 85 86 If unsure, say N. 87 88config PNFS_FILE_LAYOUT 89 tristate 90 91config PNFS_BLOCK 92 tristate 93 depends on NFS_FS && NFS_V4_1 && BLK_DEV_DM 94 default m 95 96config PNFS_OBJLAYOUT 97 tristate 98 depends on NFS_FS && NFS_V4_1 && SCSI_OSD_ULD 99 default m 100 101config ROOT_NFS 102 bool "Root file system on NFS" 103 depends on NFS_FS=y && IP_PNP 104 help 105 If you want your system to mount its root file system via NFS, 106 choose Y here. This is common practice for managing systems 107 without local permanent storage. For details, read 108 <file:Documentation/filesystems/nfs/nfsroot.txt>. 109 110 Most people say N here. 111 112config NFS_FSCACHE 113 bool "Provide NFS client caching support" 114 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y 115 help 116 Say Y here if you want NFS data to be cached locally on disc through 117 the general filesystem cache manager 118 119config NFS_USE_LEGACY_DNS 120 bool "Use the legacy NFS DNS resolver" 121 depends on NFS_V4 122 help 123 The kernel now provides a method for translating a host name into an 124 IP address. Select Y here if you would rather use your own DNS 125 resolver script. 126 127 If unsure, say N 128 129config NFS_USE_KERNEL_DNS 130 bool 131 depends on NFS_V4 && !NFS_USE_LEGACY_DNS 132 select DNS_RESOLVER 133 select KEYS 134 default y 135 136config NFS_USE_NEW_IDMAPPER 137 bool "Use the new idmapper upcall routine" 138 depends on NFS_V4 && KEYS 139 help 140 Say Y here if you want NFS to use the new idmapper upcall functions. 141 You will need /sbin/request-key (usually provided by the keyutils 142 package). For details, read 143 <file:Documentation/filesystems/nfs/idmapper.txt>. 144 145 If you are unsure, say N. 146