smb3: missing defines and structs for reparse point handling

We were missing some structs from MS-FSCC relating to
reparse point handling.  Add them to protocol defines
in smb2pdu.h

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 1ce733f3582f..79d842e7240c 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1539,6 +1539,9 @@ struct reparse_symlink_data {
         char    PathBuffer[0];
 } __attribute__((packed));
 
+/* Flag above */
+#define SYMLINK_FLAG_RELATIVE 0x00000001
+
 /* For IO_REPARSE_TAG_NFS */
 #define NFS_SPECFILE_LNK        0x00000000014B4E4C
 #define NFS_SPECFILE_CHR        0x0000000000524843
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index f753f424d7f1..5671d5ee7f58 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -842,6 +842,41 @@ struct fsctl_get_integrity_information_rsp {
 /* Integrity flags for above */
 #define FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF   0x00000001
 
+/* Reparse structures - see MS-FSCC 2.1.2 */
+
+/* struct fsctl_reparse_info_req is empty, only response structs (see below) */
+
+struct reparse_data_buffer {
+        __le32  ReparseTag;
+        __le16  ReparseDataLength;
+        __u16   Reserved;
+        __u8    DataBuffer[0]; /* Variable Length */
+} __packed;
+
+struct reparse_guid_data_buffer {
+        __le32  ReparseTag;
+        __le16  ReparseDataLength;
+        __u16   Reserved;
+        __u8    ReparseGuid[16];
+        __u8    DataBuffer[0]; /* Variable Length */
+} __packed;
+
+struct reparse_mount_point_data_buffer {
+        __le32  ReparseTag;
+        __le16  ReparseDataLength;
+        __u16   Reserved;
+        __le16  SubstituteNameOffset;
+        __le16  SubstituteNameLength;
+        __le16  PrintNameOffset;
+        __le16  PrintNameLength;
+        __u8    PathBuffer[0]; /* Variable Length */
+} __packed;
+
+/* See MS-FSCC 2.1.2.4 and cifspdu.h for struct reparse_symlink_data */
+
+/* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */
+
+
 /* See MS-DFSC 2.2.2 */
 struct fsctl_get_dfs_referral_req {
         __le16 MaxReferralLevel;