[PATCH][CIFS] Add new info level for query directory

[Steve French <smfrench@gmail.com>]

SMB3: Add new info level for query directory

The recently updated MS-SMB2 (June 2021) added protocol definitions
for a new level 60 for query directory (FileIdExtdDirectoryInformation).

Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/readdir.c |  2 +-
 fs/cifs/smb2pdu.h | 39 +++++++++++++++++++++++++++++++++++++--
 2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 00b6b953d13c..bfee176b901d 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -309,7 +309,7 @@ static void cifs_fulldir_info_to_fattr(struct
cifs_fattr *fattr,
 {
  __dir_info_to_fattr(fattr, info);

- /* See MS-FSCC 2.4.18 FileIdFullDirectoryInformation */
+ /* See MS-FSCC 2.4.19 FileIdFullDirectoryInformation */
  if (fattr->cf_cifsattrs & ATTR_REPARSE)
  fattr->cf_cifstag = le32_to_cpu(info->EaSize);
  cifs_fill_common_info(fattr, cifs_sb);
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 653486243cdf..a5c48b85549a 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -264,7 +264,7 @@ struct share_redirect_error_context_rsp {
  __le32 NotificationType;
  __le32 ResourceNameOffset;
  __le32 ResourceNameLength;
- __le16 Flags;
+ __le16 Reserved;
  __le16 TargetType;
  __le32 IPAddrCount;
  struct move_dst_ipaddr IpAddrMoveList[];
@@ -1448,6 +1448,22 @@ struct smb2_echo_rsp {

 #define SMB2_QUERY_DIRECTORY_IOV_SIZE 2

+/*
+ * Valid FileInformation classes.
+ *
+ * Note that these are a subset of the (file) QUERY_INFO levels defined
+ * later in this file (but since QUERY_DIRECTORY uses equivalent numbers
+ * we do not redefine them here)
+ *
+ * FileDirectoryInfomation 0x01
+ * FileFullDirectoryInformation 0x02
+ * FileIdFullDirectoryInformation 0x26
+ * FileBothDirectoryInformation 0x03
+ * FileIdBothDirectoryInformation 0x25
+ * FileNamesInformation 0x0C
+ * FileIdExtdDirectoryInformation 0x3C
+ */
+
 struct smb2_query_directory_req {
  struct smb2_sync_hdr sync_hdr;
  __le16 StructureSize; /* Must be 33 */
@@ -1684,6 +1700,7 @@ struct smb3_fs_vol_info {
 #define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50
 #define FILE_STANDARD_LINK_INFORMATION 54
 #define FILE_ID_INFORMATION 59
+#define FILE_ID_EXTD_DIRECTORY_INFORMATION 60

 struct smb2_file_internal_info {
  __le64 IndexNumber;
@@ -1764,13 +1781,31 @@ struct smb2_file_network_open_info {
  __le32 Reserved;
 } __packed; /* level 34 Query also similar returned in close rsp and
open rsp */

-/* See MS-FSCC 2.4.43 */
+/* See MS-FSCC 2.4.21 */
 struct smb2_file_id_information {
  __le64 VolumeSerialNumber;
  __u64  PersistentFileId; /* opaque endianness */
  __u64  VolatileFileId; /* opaque endianness */
 } __packed; /* level 59 */

+/* See MS-FSCC 2.4.18 */
+struct smb2_file_id_extd_directory_info {
+ __le32 NextEntryOffset;
+ __u32 FileIndex;
+ __le64 CreationTime;
+ __le64 LastAccessTime;
+ __le64 LastWriteTime;
+ __le64 ChangeTime;
+ __le64 EndOfFile;
+ __le64 AllocationSize;
+ __le32 FileAttributes;
+ __le32 FileNameLength;
+ __le32 EaSize; /* EA size */
+ __le32 ReparsePointTag; /* valid if FILE_ATTR_REPARSE_POINT set in
FileAttributes */
+ __le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit */
+ char FileName[1];
+} __packed; /* level 60 */
+
 extern char smb2_padding[7];

 /* equivalent of the contents of SMB3.1.1 POSIX open context response */

-- 
Thanks,

Steve