Kconfig 6.9 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_MD5
  7. select CRYPTO_HMAC
  8. select CRYPTO_ARC4
  9. help
  10. This is the client VFS module for the Common Internet File System
  11. (CIFS) protocol which is the successor to the Server Message Block
  12. (SMB) protocol, the native file sharing mechanism for most early
  13. PC operating systems. The CIFS protocol is fully supported by
  14. file servers such as Windows 2000 (including Windows 2003, NT 4
  15. and Windows XP) as well by Samba (which provides excellent CIFS
  16. server support for Linux and many other operating systems). Limited
  17. support for OS/2 and Windows ME and similar servers is provided as
  18. well.
  19. The cifs module provides an advanced network file system
  20. client for mounting to CIFS compliant servers. It includes
  21. support for DFS (hierarchical name space), secure per-user
  22. session establishment via Kerberos or NTLM or NTLMv2,
  23. safe distributed caching (oplock), optional packet
  24. signing, Unicode and other internationalization improvements.
  25. If you need to mount to Samba or Windows from this machine, say Y.
  26. config CIFS_STATS
  27. bool "CIFS statistics"
  28. depends on CIFS
  29. help
  30. Enabling this option will cause statistics for each server share
  31. mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
  32. config CIFS_STATS2
  33. bool "Extended statistics"
  34. depends on CIFS_STATS
  35. help
  36. Enabling this option will allow more detailed statistics on SMB
  37. request timing to be displayed in /proc/fs/cifs/DebugData and also
  38. allow optional logging of slow responses to dmesg (depending on the
  39. value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
  40. These additional statistics may have a minor effect on performance
  41. and memory utilization.
  42. Unless you are a developer or are doing network performance analysis
  43. or tuning, say N.
  44. config CIFS_WEAK_PW_HASH
  45. bool "Support legacy servers which use weaker LANMAN security"
  46. depends on CIFS
  47. help
  48. Modern CIFS servers including Samba and most Windows versions
  49. (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
  50. security mechanisms. These hash the password more securely
  51. than the mechanisms used in the older LANMAN version of the
  52. SMB protocol but LANMAN based authentication is needed to
  53. establish sessions with some old SMB servers.
  54. Enabling this option allows the cifs module to mount to older
  55. LANMAN based servers such as OS/2 and Windows 95, but such
  56. mounts may be less secure than mounts using NTLM or more recent
  57. security mechanisms if you are on a public network. Unless you
  58. have a need to access old SMB servers (and are on a private
  59. network) you probably want to say N. Even if this support
  60. is enabled in the kernel build, LANMAN authentication will not be
  61. used automatically. At runtime LANMAN mounts are disabled but
  62. can be set to required (or optional) either in
  63. /proc/fs/cifs (see fs/cifs/README for more detail) or via an
  64. option on the mount command. This support is disabled by
  65. default in order to reduce the possibility of a downgrade
  66. attack.
  67. If unsure, say N.
  68. config CIFS_UPCALL
  69. bool "Kerberos/SPNEGO advanced session setup"
  70. depends on CIFS && KEYS
  71. select DNS_RESOLVER
  72. help
  73. Enables an upcall mechanism for CIFS which accesses userspace helper
  74. utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
  75. which are needed to mount to certain secure servers (for which more
  76. secure Kerberos authentication is required). If unsure, say N.
  77. config CIFS_XATTR
  78. bool "CIFS extended attributes"
  79. depends on CIFS
  80. help
  81. Extended attributes are name:value pairs associated with inodes by
  82. the kernel or by users (see the attr(5) manual page, or visit
  83. <http://acl.bestbits.at/> for details). CIFS maps the name of
  84. extended attributes beginning with the user namespace prefix
  85. to SMB/CIFS EAs. EAs are stored on Windows servers without the
  86. user namespace prefix, but their names are seen by Linux cifs clients
  87. prefaced by the user namespace prefix. The system namespace
  88. (used by some filesystems to store ACLs) is not supported at
  89. this time.
  90. If unsure, say N.
  91. config CIFS_POSIX
  92. bool "CIFS POSIX Extensions"
  93. depends on CIFS_XATTR
  94. help
  95. Enabling this option will cause the cifs client to attempt to
  96. negotiate a newer dialect with servers, such as Samba 3.0.5
  97. or later, that optionally can handle more POSIX like (rather
  98. than Windows like) file behavior. It also enables
  99. support for POSIX ACLs (getfacl and setfacl) to servers
  100. (such as Samba 3.10 and later) which can negotiate
  101. CIFS POSIX ACL support. If unsure, say N.
  102. config CIFS_DEBUG2
  103. bool "Enable additional CIFS debugging routines"
  104. depends on CIFS
  105. help
  106. Enabling this option adds a few more debugging routines
  107. to the cifs code which slightly increases the size of
  108. the cifs module and can cause additional logging of debug
  109. messages in some error paths, slowing performance. This
  110. option can be turned off unless you are debugging
  111. cifs problems. If unsure, say N.
  112. config CIFS_DFS_UPCALL
  113. bool "DFS feature support"
  114. depends on CIFS && KEYS
  115. select DNS_RESOLVER
  116. help
  117. Distributed File System (DFS) support is used to access shares
  118. transparently in an enterprise name space, even if the share
  119. moves to a different server. This feature also enables
  120. an upcall mechanism for CIFS which contacts userspace helper
  121. utilities to provide server name resolution (host names to
  122. IP addresses) which is needed for implicit mounts of DFS junction
  123. points. If unsure, say N.
  124. config CIFS_FSCACHE
  125. bool "Provide CIFS client caching support (EXPERIMENTAL)"
  126. depends on EXPERIMENTAL
  127. depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
  128. help
  129. Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
  130. to be cached locally on disk through the general filesystem cache
  131. manager. If unsure, say N.
  132. config CIFS_ACL
  133. bool "Provide CIFS ACL support (EXPERIMENTAL)"
  134. depends on EXPERIMENTAL && CIFS_XATTR
  135. help
  136. Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
  137. is handed over to the application/caller.
  138. config CIFS_EXPERIMENTAL
  139. bool "CIFS Experimental Features (EXPERIMENTAL)"
  140. depends on CIFS && EXPERIMENTAL
  141. help
  142. Enables cifs features under testing. These features are
  143. experimental and currently include DFS support and directory
  144. change notification ie fcntl(F_DNOTIFY), as well as the upcall
  145. mechanism which will be used for Kerberos session negotiation
  146. and uid remapping. Some of these features also may depend on
  147. setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
  148. (which is disabled by default). See the file fs/cifs/README
  149. for more details. If unsure, say N.