Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux...

[linux-2.6-omap-h63xx.git] / fs / cifs / README

diff --git a/fs/cifs/README b/fs/cifs/README
index 68b5c1169d9d7e3eff5a3aff67cfb60980fa2050..a439dc1739b3ac7790dd9684cd0837298f5dd5a8 100644 (file)
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -463,6 +463,9 @@ A partial list of the supported mount options follows:
                with cifs style mandatory byte range locks (and most
                cifs servers do not yet support requesting advisory
                byte range locks).
+ nodfs          Disable DFS (global name space support) even if the
+               server claims to support it.  This can help work around
+               a problem with parsing of DFS paths with Samba 3.0.24 server.
  remount        remount the share (often used to change from ro to rw mounts
                or vice versa)
  cifsacl        Report mode bits (e.g. on stat) based on the Windows ACL for
@@ -488,6 +491,19 @@ A partial list of the supported mount options follows:
                Note that this differs from the sign mount option in that it
                causes encryption of data sent over this mounted share but other
                shares mounted to the same server are unaffected.
+ locallease     This option is rarely needed. Fcntl F_SETLEASE is
+               used by some applications such as Samba and NFSv4 server to
+               check to see whether a file is cacheable.  CIFS has no way
+               to explicitly request a lease, but can check whether a file
+               is cacheable (oplocked).  Unfortunately, even if a file
+               is not oplocked, it could still be cacheable (ie cifs client
+               could grant fcntl leases if no other local processes are using
+               the file) for cases for example such as when the server does not
+               support oplocks and the user is sure that the only updates to
+               the file will be from this client. Specifying this mount option
+               will allow the cifs client to check for leases (only) locally
+               for files which are not oplocked instead of denying leases
+               in that case. (EXPERIMENTAL)
  sec            Security mode.  Allowed values are:
                        none    attempt to connection as a null user (no name)
                        krb5    Use Kerberos version 5 authentication
@@ -542,10 +558,20 @@ SecurityFlags             Flags which control security negotiation and
                        hashing mechanisms (as "must use") on the other hand 
                        does not make much sense. Default flags are 
                                0x07007 
-                       (NTLM, NTLMv2 and packet signing allowed).  Maximum 
+                       (NTLM, NTLMv2 and packet signing allowed).  The maximum 
                        allowable flags if you want to allow mounts to servers
                        using weaker password hashes is 0x37037 (lanman,
-                       plaintext, ntlm, ntlmv2, signing allowed):
+                       plaintext, ntlm, ntlmv2, signing allowed).  Some
+                       SecurityFlags require the corresponding menuconfig
+                       options to be enabled (lanman and plaintext require
+                       CONFIG_CIFS_WEAK_PW_HASH for example).  Enabling
+                       plaintext authentication currently requires also
+                       enabling lanman authentication in the security flags
+                       because the cifs module only supports sending
+                       laintext passwords using the older lanman dialect
+                       form of the session setup SMB.  (e.g. for authentication
+                       using plain text passwords, set the SecurityFlags
+                       to 0x30030):
  
                        may use packet signing                          0x00001
                        must use packet signing                         0x01001
@@ -628,6 +654,9 @@ requires enabling CONFIG_CIFS_EXPERIMENTAL
        cifsacl support needed to retrieve approximated mode bits based on
                the contents on the CIFS ACL.
 
+       lease support: cifs will check the oplock state before calling into
+       the vfs to see if we can grant a lease on a file.
+
        DNOTIFY fcntl: needed for support of directory change 
                            notification and perhaps later for file leases)