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authorSteve French <sfrench@us.ibm.com>2008-08-19 20:51:09 +0000
committerSteve French <sfrench@us.ibm.com>2008-08-19 20:51:09 +0000
commit3d2af3465e91335bd1dbf36b19e92079d901409f (patch)
tree828c313011e8f70f030ef872012f63238fc14362 /fs/cifs
parentc16fefa56334e8d0197492607e473fdbb813073f (diff)
[CIFS] Kerberos support not considered experimental anymore
Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/README30
1 files changed, 26 insertions, 4 deletions
diff --git a/fs/cifs/README b/fs/cifs/README
index 2bd6fe556f8..68b5c1169d9 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -642,8 +642,30 @@ The statistics for the number of total SMBs and oplock breaks are different in
that they represent all for that share, not just those for which the server
returned success.
-Also note that "cat /proc/fs/cifs/DebugData" will display information about
+Also note that "cat /proc/fs/cifs/DebugData" will display information about
the active sessions and the shares that are mounted.
-Enabling Kerberos (extended security) works when CONFIG_CIFS_EXPERIMENTAL is
-on but requires a user space helper (from the Samba project). NTLM and NTLMv2 and
-LANMAN support do not require this helper.
+
+Enabling Kerberos (extended security) works but requires version 1.2 or later
+of the helper program cifs.upcall to be present and to be configured in the
+/etc/request-key.conf file. The cifs.upcall helper program is from the Samba
+project(http://www.samba.org). NTLM and NTLMv2 and LANMAN support do not
+require this helper. Note that NTLMv2 security (which does not require the
+cifs.upcall helper program), instead of using Kerberos, is sufficient for
+some use cases.
+
+Enabling DFS support (used to access shares transparently in an MS-DFS
+global name space) requires that CONFIG_CIFS_EXPERIMENTAL be enabled. In
+addition, DFS support for target shares which are specified as UNC
+names which begin with host names (rather than IP addresses) requires
+a user space helper (such as cifs.upcall) to be present in order to
+translate host names to ip address, and the user space helper must also
+be configured in the file /etc/request-key.conf
+
+To use cifs Kerberos and DFS support, the Linux keyutils package should be
+installed and something like the following lines should be added to the
+/etc/request-key.conf file:
+
+create cifs.spnego * * /usr/local/sbin/cifs.upcall %k
+create dns_resolver * * /usr/local/sbin/cifs.upcall %k
+
+