CIFS: Add SMB2 support for is_path_accessible

that needs for a successful mount through SMB2 protocol.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 10729a74da27..eb73a136641c 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -230,6 +230,11 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr)
                     ((struct smb2_sess_setup_rsp *)hdr)->SecurityBufferLength);
                 break;
         case SMB2_CREATE:
+                *off = le32_to_cpu(
+                    ((struct smb2_create_rsp *)hdr)->CreateContextsOffset);
+                *len = le32_to_cpu(
+                    ((struct smb2_create_rsp *)hdr)->CreateContextsLength);
+                break;
         case SMB2_READ:
         case SMB2_QUERY_INFO:
         case SMB2_QUERY_DIRECTORY:
@@ -315,3 +320,23 @@ calc_size_exit:
         cFYI(1, "SMB2 len %d", len);
         return len;
 }
+
+/* Note: caller must free return buffer */
+__le16 *
+cifs_convert_path_to_utf16(const char *from, struct cifs_sb_info *cifs_sb)
+{
+        int len;
+        const char *start_of_path;
+        __le16 *to;
+
+        /* Windows doesn't allow paths beginning with \ */
+        if (from[0] == '\\')
+                start_of_path = from + 1;
+        else
+                start_of_path = from;
+        to = cifs_strndup_to_utf16(start_of_path, PATH_MAX, &len,
+                                   cifs_sb->local_nls,
+                                   cifs_sb->mnt_cifs_flags &
+                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+        return to;
+}