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 select KEYS 68 help 69 This option enables support for version 4 of the NFS protocol 70 (RFC 3530) in the kernel's NFS client. 71 72 To mount NFS servers using NFSv4, you also need to install user 73 space programs which can be found in the Linux nfs-utils package, 74 available from http://linux-nfs.org/. 75 76 If unsure, say Y. 77 78config NFS_V4_1 79 bool "NFS client support for NFSv4.1 (EXPERIMENTAL)" 80 depends on NFS_FS && NFS_V4 && EXPERIMENTAL 81 select SUNRPC_BACKCHANNEL 82 select PNFS_FILE_LAYOUT 83 help 84 This option enables support for minor version 1 of the NFSv4 protocol 85 (RFC 5661) in the kernel's NFS client. 86 87 If unsure, say N. 88 89config PNFS_FILE_LAYOUT 90 tristate 91 92config PNFS_BLOCK 93 tristate 94 depends on NFS_FS && NFS_V4_1 && BLK_DEV_DM 95 default m 96 97config PNFS_OBJLAYOUT 98 tristate 99 depends on NFS_FS && NFS_V4_1 && SCSI_OSD_ULD 100 default m 101 102config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN 103 string "NFSv4.1 Implementation ID Domain" 104 depends on NFS_V4_1 105 default "kernel.org" 106 help 107 This option defines the domain portion of the implementation ID that 108 may be sent in the NFS exchange_id operation. The value must be in 109 the format of a DNS domain name and should be set to the DNS domain 110 name of the distribution. 111 If the NFS client is unchanged from the upstream kernel, this 112 option should be set to the default "kernel.org". 113 114config ROOT_NFS 115 bool "Root file system on NFS" 116 depends on NFS_FS=y && IP_PNP 117 help 118 If you want your system to mount its root file system via NFS, 119 choose Y here. This is common practice for managing systems 120 without local permanent storage. For details, read 121 <file:Documentation/filesystems/nfs/nfsroot.txt>. 122 123 Most people say N here. 124 125config NFS_FSCACHE 126 bool "Provide NFS client caching support" 127 depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y 128 help 129 Say Y here if you want NFS data to be cached locally on disc through 130 the general filesystem cache manager 131 132config NFS_USE_LEGACY_DNS 133 bool "Use the legacy NFS DNS resolver" 134 depends on NFS_V4 135 help 136 The kernel now provides a method for translating a host name into an 137 IP address. Select Y here if you would rather use your own DNS 138 resolver script. 139 140 If unsure, say N 141 142config NFS_USE_KERNEL_DNS 143 bool 144 depends on NFS_V4 && !NFS_USE_LEGACY_DNS 145 select DNS_RESOLVER 146 default y 147 148config NFS_DEBUG 149 bool 150 depends on NFS_FS && SUNRPC_DEBUG 151 select CRC32 152 default y 153