Kconfig 6.5 KB

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