| config CIFS |
| tristate "CIFS support (advanced network filesystem, SMBFS successor)" |
| depends on INET |
| select NLS |
| select SLOW_WORK |
| help |
| This is the client VFS module for the Common Internet File System |
| (CIFS) protocol which is the successor to the Server Message Block |
| (SMB) protocol, the native file sharing mechanism for most early |
| PC operating systems. The CIFS protocol is fully supported by |
| file servers such as Windows 2000 (including Windows 2003, NT 4 |
| and Windows XP) as well by Samba (which provides excellent CIFS |
| server support for Linux and many other operating systems). Limited |
| support for OS/2 and Windows ME and similar servers is provided as |
| well. |
| |
| The cifs module provides an advanced network file system |
| client for mounting to CIFS compliant servers. It includes |
| support for DFS (hierarchical name space), secure per-user |
| session establishment via Kerberos or NTLM or NTLMv2, |
| safe distributed caching (oplock), optional packet |
| signing, Unicode and other internationalization improvements. |
| If you need to mount to Samba or Windows from this machine, say Y. |
| |
| config CIFS_STATS |
| bool "CIFS statistics" |
| depends on CIFS |
| help |
| Enabling this option will cause statistics for each server share |
| mounted by the cifs client to be displayed in /proc/fs/cifs/Stats |
| |
| config CIFS_STATS2 |
| bool "Extended statistics" |
| depends on CIFS_STATS |
| help |
| Enabling this option will allow more detailed statistics on SMB |
| request timing to be displayed in /proc/fs/cifs/DebugData and also |
| allow optional logging of slow responses to dmesg (depending on the |
| value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details). |
| These additional statistics may have a minor effect on performance |
| and memory utilization. |
| |
| Unless you are a developer or are doing network performance analysis |
| or tuning, say N. |
| |
| config CIFS_WEAK_PW_HASH |
| bool "Support legacy servers which use weaker LANMAN security" |
| depends on CIFS |
| help |
| Modern CIFS servers including Samba and most Windows versions |
| (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos) |
| security mechanisms. These hash the password more securely |
| than the mechanisms used in the older LANMAN version of the |
| SMB protocol but LANMAN based authentication is needed to |
| establish sessions with some old SMB servers. |
| |
| Enabling this option allows the cifs module to mount to older |
| LANMAN based servers such as OS/2 and Windows 95, but such |
| mounts may be less secure than mounts using NTLM or more recent |
| security mechanisms if you are on a public network. Unless you |
| have a need to access old SMB servers (and are on a private |
| network) you probably want to say N. Even if this support |
| is enabled in the kernel build, LANMAN authentication will not be |
| used automatically. At runtime LANMAN mounts are disabled but |
| can be set to required (or optional) either in |
| /proc/fs/cifs (see fs/cifs/README for more detail) or via an |
| option on the mount command. This support is disabled by |
| default in order to reduce the possibility of a downgrade |
| attack. |
| |
| If unsure, say N. |
| |
| config CIFS_UPCALL |
| bool "Kerberos/SPNEGO advanced session setup" |
| depends on CIFS && KEYS |
| help |
| Enables an upcall mechanism for CIFS which accesses |
| userspace helper utilities to provide SPNEGO packaged (RFC 4178) |
| Kerberos tickets which are needed to mount to certain secure servers |
| (for which more secure Kerberos authentication is required). If |
| unsure, say N. |
| |
| config CIFS_XATTR |
| bool "CIFS extended attributes" |
| depends on CIFS |
| help |
| Extended attributes are name:value pairs associated with inodes by |
| the kernel or by users (see the attr(5) manual page, or visit |
| <http://acl.bestbits.at/> for details). CIFS maps the name of |
| extended attributes beginning with the user namespace prefix |
| to SMB/CIFS EAs. EAs are stored on Windows servers without the |
| user namespace prefix, but their names are seen by Linux cifs clients |
| prefaced by the user namespace prefix. The system namespace |
| (used by some filesystems to store ACLs) is not supported at |
| this time. |
| |
| If unsure, say N. |
| |
| config CIFS_POSIX |
| bool "CIFS POSIX Extensions" |
| depends on CIFS_XATTR |
| help |
| Enabling this option will cause the cifs client to attempt to |
| negotiate a newer dialect with servers, such as Samba 3.0.5 |
| or later, that optionally can handle more POSIX like (rather |
| than Windows like) file behavior. It also enables |
| support for POSIX ACLs (getfacl and setfacl) to servers |
| (such as Samba 3.10 and later) which can negotiate |
| CIFS POSIX ACL support. If unsure, say N. |
| |
| config CIFS_DEBUG2 |
| bool "Enable additional CIFS debugging routines" |
| depends on CIFS |
| help |
| Enabling this option adds a few more debugging routines |
| to the cifs code which slightly increases the size of |
| the cifs module and can cause additional logging of debug |
| messages in some error paths, slowing performance. This |
| option can be turned off unless you are debugging |
| cifs problems. If unsure, say N. |
| |
| config CIFS_DFS_UPCALL |
| bool "DFS feature support" |
| depends on CIFS && KEYS |
| help |
| Distributed File System (DFS) support is used to access shares |
| transparently in an enterprise name space, even if the share |
| moves to a different server. This feature also enables |
| an upcall mechanism for CIFS which contacts userspace helper |
| utilities to provide server name resolution (host names to |
| IP addresses) which is needed for implicit mounts of DFS junction |
| points. If unsure, say N. |
| |
| config CIFS_FSCACHE |
| bool "Provide CIFS client caching support (EXPERIMENTAL)" |
| depends on EXPERIMENTAL |
| depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y |
| help |
| Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data |
| to be cached locally on disk through the general filesystem cache |
| manager. If unsure, say N. |
| |
| config CIFS_EXPERIMENTAL |
| bool "CIFS Experimental Features (EXPERIMENTAL)" |
| depends on CIFS && EXPERIMENTAL |
| help |
| Enables cifs features under testing. These features are |
| experimental and currently include DFS support and directory |
| change notification ie fcntl(F_DNOTIFY), as well as the upcall |
| mechanism which will be used for Kerberos session negotiation |
| and uid remapping. Some of these features also may depend on |
| setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental |
| (which is disabled by default). See the file fs/cifs/README |
| for more details. If unsure, say N. |
| |