Kconfig 7.2 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_DES
  11. help
  12. This is the client VFS module for the Common Internet File System
  13. (CIFS) protocol which is the successor to the Server Message Block
  14. (SMB) protocol, the native file sharing mechanism for most early
  15. PC operating systems. The CIFS protocol is fully supported by
  16. file servers such as Windows 2000 (including Windows 2003, NT 4
  17. and Windows XP) as well by Samba (which provides excellent CIFS
  18. server support for Linux and many other operating systems). Limited
  19. support for OS/2 and Windows ME and similar servers is provided as
  20. well.
  21. The cifs module provides an advanced network file system
  22. client for mounting to CIFS compliant servers. It includes
  23. support for DFS (hierarchical name space), secure per-user
  24. session establishment via Kerberos or NTLM or NTLMv2,
  25. safe distributed caching (oplock), optional packet
  26. signing, Unicode and other internationalization improvements.
  27. If you need to mount to Samba or Windows from this machine, say Y.
  28. config CIFS_STATS
  29. bool "CIFS statistics"
  30. depends on CIFS
  31. help
  32. Enabling this option will cause statistics for each server share
  33. mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
  34. config CIFS_STATS2
  35. bool "Extended statistics"
  36. depends on CIFS_STATS
  37. help
  38. Enabling this option will allow more detailed statistics on SMB
  39. request timing to be displayed in /proc/fs/cifs/DebugData and also
  40. allow optional logging of slow responses to dmesg (depending on the
  41. value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
  42. These additional statistics may have a minor effect on performance
  43. and memory utilization.
  44. Unless you are a developer or are doing network performance analysis
  45. or tuning, say N.
  46. config CIFS_WEAK_PW_HASH
  47. bool "Support legacy servers which use weaker LANMAN security"
  48. depends on CIFS
  49. help
  50. Modern CIFS servers including Samba and most Windows versions
  51. (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
  52. security mechanisms. These hash the password more securely
  53. than the mechanisms used in the older LANMAN version of the
  54. SMB protocol but LANMAN based authentication is needed to
  55. establish sessions with some old SMB servers.
  56. Enabling this option allows the cifs module to mount to older
  57. LANMAN based servers such as OS/2 and Windows 95, but such
  58. mounts may be less secure than mounts using NTLM or more recent
  59. security mechanisms if you are on a public network. Unless you
  60. have a need to access old SMB servers (and are on a private
  61. network) you probably want to say N. Even if this support
  62. is enabled in the kernel build, LANMAN authentication will not be
  63. used automatically. At runtime LANMAN mounts are disabled but
  64. can be set to required (or optional) either in
  65. /proc/fs/cifs (see fs/cifs/README for more detail) or via an
  66. option on the mount command. This support is disabled by
  67. default in order to reduce the possibility of a downgrade
  68. attack.
  69. If unsure, say N.
  70. config CIFS_UPCALL
  71. bool "Kerberos/SPNEGO advanced session setup"
  72. depends on CIFS && KEYS
  73. select DNS_RESOLVER
  74. help
  75. Enables an upcall mechanism for CIFS which accesses userspace helper
  76. utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
  77. which are needed to mount to certain secure servers (for which more
  78. secure Kerberos authentication is required). If unsure, say N.
  79. config CIFS_XATTR
  80. bool "CIFS extended attributes"
  81. depends on CIFS
  82. help
  83. Extended attributes are name:value pairs associated with inodes by
  84. the kernel or by users (see the attr(5) manual page, or visit
  85. <http://acl.bestbits.at/> for details). CIFS maps the name of
  86. extended attributes beginning with the user namespace prefix
  87. to SMB/CIFS EAs. EAs are stored on Windows servers without the
  88. user namespace prefix, but their names are seen by Linux cifs clients
  89. prefaced by the user namespace prefix. The system namespace
  90. (used by some filesystems to store ACLs) is not supported at
  91. this time.
  92. If unsure, say N.
  93. config CIFS_POSIX
  94. bool "CIFS POSIX Extensions"
  95. depends on CIFS_XATTR
  96. help
  97. Enabling this option will cause the cifs client to attempt to
  98. negotiate a newer dialect with servers, such as Samba 3.0.5
  99. or later, that optionally can handle more POSIX like (rather
  100. than Windows like) file behavior. It also enables
  101. support for POSIX ACLs (getfacl and setfacl) to servers
  102. (such as Samba 3.10 and later) which can negotiate
  103. CIFS POSIX ACL support. If unsure, say N.
  104. config CIFS_DEBUG2
  105. bool "Enable additional CIFS debugging routines"
  106. depends on CIFS
  107. help
  108. Enabling this option adds a few more debugging routines
  109. to the cifs code which slightly increases the size of
  110. the cifs module and can cause additional logging of debug
  111. messages in some error paths, slowing performance. This
  112. option can be turned off unless you are debugging
  113. cifs problems. If unsure, say N.
  114. config CIFS_DFS_UPCALL
  115. bool "DFS feature support"
  116. depends on CIFS && KEYS
  117. select DNS_RESOLVER
  118. help
  119. Distributed File System (DFS) support is used to access shares
  120. transparently in an enterprise name space, even if the share
  121. moves to a different server. This feature also enables
  122. an upcall mechanism for CIFS which contacts userspace helper
  123. utilities to provide server name resolution (host names to
  124. IP addresses) which is needed for implicit mounts of DFS junction
  125. points. If unsure, say N.
  126. config CIFS_FSCACHE
  127. bool "Provide CIFS client caching support (EXPERIMENTAL)"
  128. depends on EXPERIMENTAL
  129. depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
  130. help
  131. Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
  132. to be cached locally on disk through the general filesystem cache
  133. manager. If unsure, say N.
  134. config CIFS_ACL
  135. bool "Provide CIFS ACL support (EXPERIMENTAL)"
  136. depends on EXPERIMENTAL && CIFS_XATTR
  137. help
  138. Allows to fetch CIFS/NTFS ACL from the server. The DACL blob
  139. is handed over to the application/caller.
  140. config CIFS_SMB2
  141. bool "SMB2 network file system support (EXPERIMENTAL)"
  142. depends on EXPERIMENTAL && INET && BROKEN
  143. select NLS
  144. select KEYS
  145. select FSCACHE
  146. select DNS_RESOLVER
  147. help
  148. This enables experimental support for the SMB2 (Server Message Block
  149. version 2) protocol. The SMB2 protocol is the successor to the
  150. popular CIFS and SMB network file sharing protocols. SMB2 is the
  151. native file sharing mechanism for recent versions of Windows
  152. operating systems (since Vista). SMB2 enablement will eventually
  153. allow users better performance, security and features, than would be
  154. possible with cifs. Note that smb2 mount options also are simpler
  155. (compared to cifs) due to protocol improvements.
  156. Unless you are a developer or tester, say N.
  157. config CIFS_NFSD_EXPORT
  158. bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
  159. depends on CIFS && EXPERIMENTAL
  160. help
  161. Allows NFS server to export a CIFS mounted share (nfsd over cifs)