LXR linux/fs/nfs/Kconfig

   1config NFS_FS
   2        tristate "NFS client support"
   3        depends on INET && FILE_LOCKING && MULTIUSER
   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_V2
  33        tristate "NFS client support for NFS version 2"
  34        depends on NFS_FS
  35        default y
  36        help
  37          This option enables support for version 2 of the NFS protocol
  38          (RFC 1094) in the kernel's NFS client.
  39
  40          If unsure, say Y.
  41
  42config NFS_V3
  43        tristate "NFS client support for NFS version 3"
  44        depends on NFS_FS
  45        default y
  46        help
  47          This option enables support for version 3 of the NFS protocol
  48          (RFC 1813) in the kernel's NFS client.
  49
  50          If unsure, say Y.
  51
  52config NFS_V3_ACL
  53        bool "NFS client support for the NFSv3 ACL protocol extension"
  54        depends on NFS_V3
  55        help
  56          Some NFS servers support an auxiliary NFSv3 ACL protocol that
  57          Sun added to Solaris but never became an official part of the
  58          NFS version 3 protocol.  This protocol extension allows
  59          applications on NFS clients to manipulate POSIX Access Control
  60          Lists on files residing on NFS servers.  NFS servers enforce
  61          ACLs on local files whether this protocol is available or not.
  62
  63          Choose Y here if your NFS server supports the Solaris NFSv3 ACL
  64          protocol extension and you want your NFS client to allow
  65          applications to access and modify ACLs on files on the server.
  66
  67          Most NFS servers don't support the Solaris NFSv3 ACL protocol
  68          extension.  You can choose N here or specify the "noacl" mount
  69          option to prevent your NFS client from trying to use the NFSv3
  70          ACL protocol.
  71
  72          If unsure, say N.
  73
  74config NFS_V4
  75        tristate "NFS client support for NFS version 4"
  76        depends on NFS_FS
  77        select SUNRPC_GSS
  78        select KEYS
  79        help
  80          This option enables support for version 4 of the NFS protocol
  81          (RFC 3530) in the kernel's NFS client.
  82
  83          To mount NFS servers using NFSv4, you also need to install user
  84          space programs which can be found in the Linux nfs-utils package,
  85          available from http://linux-nfs.org/.
  86
  87          If unsure, say Y.
  88
  89config NFS_SWAP
  90        bool "Provide swap over NFS support"
  91        default n
  92        depends on NFS_FS
  93        select SUNRPC_SWAP
  94        help
  95          This option enables swapon to work on files located on NFS mounts.
  96
  97config NFS_V4_1
  98        bool "NFS client support for NFSv4.1"
  99        depends on NFS_V4
 100        select SUNRPC_BACKCHANNEL
 101        help
 102          This option enables support for minor version 1 of the NFSv4 protocol
 103          (RFC 5661) in the kernel's NFS client.
 104
 105          If unsure, say N.
 106
 107config NFS_V4_2
 108        bool "NFS client support for NFSv4.2"
 109        depends on NFS_V4_1
 110        help
 111          This option enables support for minor version 2 of the NFSv4 protocol
 112          in the kernel's NFS client.
 113
 114          If unsure, say N.
 115
 116config PNFS_FILE_LAYOUT
 117        tristate
 118        depends on NFS_V4_1
 119        default NFS_V4
 120
 121config PNFS_BLOCK
 122        tristate
 123        depends on NFS_V4_1 && BLK_DEV_DM
 124        default NFS_V4
 125
 126config PNFS_OBJLAYOUT
 127        tristate
 128        depends on NFS_V4_1 && SCSI_OSD_ULD
 129        default NFS_V4
 130
 131config PNFS_FLEXFILE_LAYOUT
 132        tristate
 133        depends on NFS_V4_1 && NFS_V3
 134        default m
 135
 136config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 137        string "NFSv4.1 Implementation ID Domain"
 138        depends on NFS_V4_1
 139        default "kernel.org"
 140        help
 141          This option defines the domain portion of the implementation ID that
 142          may be sent in the NFS exchange_id operation.  The value must be in
 143          the format of a DNS domain name and should be set to the DNS domain
 144          name of the distribution.
 145          If the NFS client is unchanged from the upstream kernel, this
 146          option should be set to the default "kernel.org".
 147
 148config NFS_V4_1_MIGRATION
 149        bool "NFSv4.1 client support for migration"
 150        depends on NFS_V4_1
 151        default n
 152        help
 153          This option makes the NFS client advertise to NFSv4.1 servers that
 154          it can support NFSv4 migration.
 155
 156          The NFSv4.1 pieces of the Linux NFSv4 migration implementation are
 157          still experimental.  If you are not an NFSv4 developer, say N here.
 158
 159config NFS_V4_SECURITY_LABEL
 160        bool
 161        depends on NFS_V4_2 && SECURITY
 162        default y
 163
 164config ROOT_NFS
 165        bool "Root file system on NFS"
 166        depends on NFS_FS=y && IP_PNP
 167        help
 168          If you want your system to mount its root file system via NFS,
 169          choose Y here.  This is common practice for managing systems
 170          without local permanent storage.  For details, read
 171          <file:Documentation/filesystems/nfs/nfsroot.txt>.
 172
 173          Most people say N here.
 174
 175config NFS_FSCACHE
 176        bool "Provide NFS client caching support"
 177        depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y
 178        help
 179          Say Y here if you want NFS data to be cached locally on disc through
 180          the general filesystem cache manager
 181
 182config NFS_USE_LEGACY_DNS
 183        bool "Use the legacy NFS DNS resolver"
 184        depends on NFS_V4
 185        help
 186          The kernel now provides a method for translating a host name into an
 187          IP address.  Select Y here if you would rather use your own DNS
 188          resolver script.
 189
 190          If unsure, say N
 191
 192config NFS_USE_KERNEL_DNS
 193        bool
 194        depends on NFS_V4 && !NFS_USE_LEGACY_DNS
 195        select DNS_RESOLVER
 196        default y
 197
 198config NFS_DEBUG
 199        bool
 200        depends on NFS_FS && SUNRPC_DEBUG
 201        select CRC32
 202        default y
 203