CIFS: Add SMB2 support for is_path_accessible

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / smb2misc.c

diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 10729a74da2702d91285b41dc933dc7f674cb34e..eb73a136641ced7d93e74d873809550573da2aed 100644 (file)
--- 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;
+}