fs/cifs/Kconfig

   1 config CIFS
   2         tristate "CIFS support (advanced network filesystem, SMBFS successor)"
   3         depends on INET
   4         select NLS
   5         select CRYPTO
   6         select CRYPTO_MD4
   7         select CRYPTO_MD5
   8         select CRYPTO_HMAC
   9         select CRYPTO_ARC4
  10         select CRYPTO_ECB
  11         select CRYPTO_DES
  12         select CRYPTO_SHA256
  13         select CRYPTO_CMAC
  14         help
  15           This is the client VFS module for the Common Internet File System
  16           (CIFS) protocol which is the successor to the Server Message Block
  17           (SMB) protocol, the native file sharing mechanism for most early
  18           PC operating systems.  The CIFS protocol is fully supported by
  19           file servers such as Windows 2000 (including Windows 2003, Windows 2008,
  20           NT 4 and Windows XP) as well by Samba (which provides excellent CIFS
  21           server support for Linux and many other operating systems). Limited
  22           support for OS/2 and Windows ME and similar servers is provided as
  23           well.
  24
  25           The cifs module provides an advanced network file system
  26           client for mounting to CIFS compliant servers.  It includes
  27           support for DFS (hierarchical name space), secure per-user
  28           session establishment via Kerberos or NTLM or NTLMv2,
  29           safe distributed caching (oplock), optional packet
  30           signing, Unicode and other internationalization improvements.
  31           If you need to mount to Samba or Windows from this machine, say Y.
  32
  33 config CIFS_STATS
  34         bool "CIFS statistics"
  35         depends on CIFS
  36         help
  37           Enabling this option will cause statistics for each server share
  38           mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
  39
  40 config CIFS_STATS2
  41         bool "Extended statistics"
  42         depends on CIFS_STATS
  43         help
  44           Enabling this option will allow more detailed statistics on SMB
  45           request timing to be displayed in /proc/fs/cifs/DebugData and also
  46           allow optional logging of slow responses to dmesg (depending on the
  47           value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
  48           These additional statistics may have a minor effect on performance
  49           and memory utilization.
  50
  51           Unless you are a developer or are doing network performance analysis
  52           or tuning, say N.
  53
  54 config CIFS_WEAK_PW_HASH
  55         bool "Support legacy servers which use weaker LANMAN security"
  56         depends on CIFS
  57         help
  58           Modern CIFS servers including Samba and most Windows versions
  59           (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
  60           security mechanisms. These hash the password more securely
  61           than the mechanisms used in the older LANMAN version of the
  62           SMB protocol but LANMAN based authentication is needed to
  63           establish sessions with some old SMB servers.
  64
  65           Enabling this option allows the cifs module to mount to older
  66           LANMAN based servers such as OS/2 and Windows 95, but such
  67           mounts may be less secure than mounts using NTLM or more recent
  68           security mechanisms if you are on a public network.  Unless you
  69           have a need to access old SMB servers (and are on a private
  70           network) you probably want to say N.  Even if this support
  71           is enabled in the kernel build, LANMAN authentication will not be
  72           used automatically. At runtime LANMAN mounts are disabled but
  73           can be set to required (or optional) either in
  74           /proc/fs/cifs (see fs/cifs/README for more detail) or via an
  75           option on the mount command. This support is disabled by
  76           default in order to reduce the possibility of a downgrade
  77           attack.
  78
  79           If unsure, say N.
  80
  81 config CIFS_UPCALL
  82         bool "Kerberos/SPNEGO advanced session setup"
  83         depends on CIFS && KEYS
  84         select DNS_RESOLVER
  85         help
  86           Enables an upcall mechanism for CIFS which accesses userspace helper
  87           utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
  88           which are needed to mount to certain secure servers (for which more
  89           secure Kerberos authentication is required). If unsure, say N.
  90
  91 config CIFS_XATTR
  92         bool "CIFS extended attributes"
  93         depends on CIFS
  94         help
  95           Extended attributes are name:value pairs associated with inodes by
  96           the kernel or by users (see the attr(5) manual page, or visit
  97           <http://acl.bestbits.at/> for details).  CIFS maps the name of
  98           extended attributes beginning with the user namespace prefix
  99           to SMB/CIFS EAs. EAs are stored on Windows servers without the
 100           user namespace prefix, but their names are seen by Linux cifs clients
 101           prefaced by the user namespace prefix. The system namespace
 102           (used by some filesystems to store ACLs) is not supported at
 103           this time.
 104
 105           If unsure, say N.
 106
 107 config CIFS_POSIX
 108         bool "CIFS POSIX Extensions"
 109         depends on CIFS_XATTR
 110         help
 111           Enabling this option will cause the cifs client to attempt to
 112           negotiate a newer dialect with servers, such as Samba 3.0.5
 113           or later, that optionally can handle more POSIX like (rather
 114           than Windows like) file behavior.  It also enables
 115           support for POSIX ACLs (getfacl and setfacl) to servers
 116           (such as Samba 3.10 and later) which can negotiate
 117           CIFS POSIX ACL support.  If unsure, say N.
 118
 119 config CIFS_ACL
 120           bool "Provide CIFS ACL support"
 121           depends on CIFS_XATTR && KEYS
 122           help
 123             Allows fetching CIFS/NTFS ACL from the server.  The DACL blob
 124             is handed over to the application/caller.
 125
 126 config CIFS_DEBUG
 127         bool "Enable CIFS debugging routines"
 128         default y
 129         depends on CIFS
 130         help
 131            Enabling this option adds helpful debugging messages to
 132            the cifs code which increases the size of the cifs module.
 133            If unsure, say Y.
 134 config CIFS_DEBUG2
 135         bool "Enable additional CIFS debugging routines"
 136         depends on CIFS_DEBUG
 137         help
 138            Enabling this option adds a few more debugging routines
 139            to the cifs code which slightly increases the size of
 140            the cifs module and can cause additional logging of debug
 141            messages in some error paths, slowing performance. This
 142            option can be turned off unless you are debugging
 143            cifs problems.  If unsure, say N.
 144
 145 config CIFS_DFS_UPCALL
 146           bool "DFS feature support"
 147           depends on CIFS && KEYS
 148           select DNS_RESOLVER
 149           help
 150             Distributed File System (DFS) support is used to access shares
 151             transparently in an enterprise name space, even if the share
 152             moves to a different server.  This feature also enables
 153             an upcall mechanism for CIFS which contacts userspace helper
 154             utilities to provide server name resolution (host names to
 155             IP addresses) which is needed for implicit mounts of DFS junction
 156             points. If unsure, say N.
 157
 158 config CIFS_NFSD_EXPORT
 159           bool "Allow nfsd to export CIFS file system"
 160           depends on CIFS && BROKEN
 161           help
 162            Allows NFS server to export a CIFS mounted share (nfsd over cifs)
 163
 164 config CIFS_SMB2
 165         bool "SMB2 network file system support"
 166         depends on CIFS && INET
 167         select NLS
 168         select KEYS
 169         select FSCACHE
 170         select DNS_RESOLVER
 171
 172         help
 173           This enables experimental support for the SMB2 (Server Message Block
 174           version 2) protocol. The SMB2 protocol is the successor to the
 175           popular CIFS and SMB network file sharing protocols. SMB2 is the
 176           native file sharing mechanism for recent versions of Windows
 177           operating systems (since Vista).  SMB2 enablement will eventually
 178           allow users better performance, security and features, than would be
 179           possible with cifs. Note that smb2 mount options also are simpler
 180           (compared to cifs) due to protocol improvements.
 181
 182           Unless you are a developer or tester, say N.
 183
 184 config CIFS_FSCACHE
 185           bool "Provide CIFS client caching support"
 186           depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
 187           help
 188             Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
 189             to be cached locally on disk through the general filesystem cache
 190             manager. If unsure, say N.
 191