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-rw-r--r--fs/cifs/Kconfig21
-rw-r--r--fs/cifs/cifspdu.h20
2 files changed, 22 insertions, 19 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 341a98965bd..6994a0f54f0 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -118,6 +118,18 @@ config CIFS_DEBUG2
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_EXPERIMENTAL
bool "CIFS Experimental Features (EXPERIMENTAL)"
depends on CIFS && EXPERIMENTAL
@@ -131,12 +143,3 @@ config CIFS_EXPERIMENTAL
(which is disabled by default). See the file fs/cifs/README
for more details. If unsure, say N.
-config CIFS_DFS_UPCALL
- bool "DFS feature support (EXPERIMENTAL)"
- depends on CIFS_EXPERIMENTAL
- depends on KEYS
- help
- 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.
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index eda6e511fd3..56127638b91 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1931,19 +1931,19 @@ typedef struct smb_com_transaction2_get_dfs_refer_req {
#define DFS_TYPE_ROOT 0x0001
/* Referral Entry Flags */
-#define DFS_NAME_LIST_REF 0x0200
+#define DFS_NAME_LIST_REF 0x0200 /* set for domain or DC referral responses */
+#define DFS_TARGET_SET_BOUNDARY 0x0400 /* only valid with version 4 dfs req */
-typedef struct dfs_referral_level_3 {
- __le16 VersionNumber;
+typedef struct dfs_referral_level_3 { /* version 4 is same, + one flag bit */
+ __le16 VersionNumber; /* must be 3 or 4 */
__le16 Size;
__le16 ServerType; /* 0x0001 = root targets; 0x0000 = link targets */
- __le16 ReferralEntryFlags; /* 0x0200 bit set only for domain
- or DC referral responce */
+ __le16 ReferralEntryFlags;
__le32 TimeToLive;
__le16 DfsPathOffset;
__le16 DfsAlternatePathOffset;
__le16 NetworkAddressOffset; /* offset of the link target */
- __le16 ServiceSiteGuid;
+ __u8 ServiceSiteGuid[16]; /* MBZ, ignored */
} __attribute__((packed)) REFERRAL3;
typedef struct smb_com_transaction_get_dfs_refer_rsp {
@@ -1953,15 +1953,15 @@ typedef struct smb_com_transaction_get_dfs_refer_rsp {
__u8 Pad;
__le16 PathConsumed;
__le16 NumberOfReferrals;
- __le16 DFSFlags;
- __u16 Pad2;
+ __le32 DFSFlags;
REFERRAL3 referrals[1]; /* array of level 3 dfs_referral structures */
/* followed by the strings pointed to by the referral structures */
} __attribute__((packed)) TRANSACTION2_GET_DFS_REFER_RSP;
/* DFS Flags */
-#define DFSREF_REFERRAL_SERVER 0x0001
-#define DFSREF_STORAGE_SERVER 0x0002
+#define DFSREF_REFERRAL_SERVER 0x00000001 /* all targets are DFS roots */
+#define DFSREF_STORAGE_SERVER 0x00000002 /* no further ref requests needed */
+#define DFSREF_TARGET_FAILBACK 0x00000004 /* only for DFS referral version 4 */
/* IOCTL information */
/*