[PATCH v5 1/3] smb/server: support compound fid in notify requests

[ChenXiaoSong <chenxiaosong@chenxiaosong.com>]

From: ChenXiaoSong <chenxiaosong@kylinos.cn>

A Windows client can send a compound request containing:

  Create Request, File: <share>; Notify Request

The Notify Request uses FFFF...FFFF as the compound FID.

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
---
 fs/smb/server/smb2pdu.c | 41 -----------------------------------------
 1 file changed, 41 deletions(-)

diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 2fbd9010513e..86f93f81cdfd 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -11818,47 +11818,6 @@ int smb2_notify(struct ksmbd_work *work)
 		return -EIO;
 	}
 
-	/*
-	 * macOS backupd sends CHANGE_NOTIFY with FileId=FFFF...FFFF (share-root
-	 * sentinel) to watch for changes on the share root without holding an
-	 * open handle. Respond STATUS_PENDING + STATUS_NOTIFY_CLEANUP immediately;
-	 * without this, backupd aborts Time Machine setup on STATUS_FILE_CLOSED.
-	 */
-	if (req->VolatileFileId == SMB2_NO_FID &&
-	    req->PersistentFileId == SMB2_NO_FID) {
-		in_work = ksmbd_alloc_work_struct();
-		if (!in_work || allocate_interim_rsp_buf(in_work)) {
-			if (in_work)
-				ksmbd_free_work_struct(in_work);
-			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
-			smb2_set_err_rsp(work);
-			return 0;
-		}
-		if (setup_async_work(work, NULL, NULL)) {
-			ksmbd_free_work_struct(in_work);
-			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
-			smb2_set_err_rsp(work);
-			return 0;
-		}
-		smb2_send_interim_resp(work, STATUS_PENDING);
-		in_work->conn = work->conn;
-		in_hdr = smb_get_msg(in_work->response_buf);
-		memcpy(in_hdr, ksmbd_resp_buf_next(work),
-		       __SMB2_HEADER_STRUCTURE_SIZE);
-		in_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
-		in_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
-		smb2_set_err_rsp(in_work);
-		in_hdr->Status = STATUS_NOTIFY_CLEANUP;
-		in_work->async_id = work->async_id;
-		work->async_id = 0;
-		release_async_work(work);
-		if (smb2_send_interim_work(in_work, work, false))
-			ksmbd_debug(SMB, "failed to send notify cleanup\n");
-		ksmbd_free_work_struct(in_work);
-		work->send_no_response = 1;
-		return 0;
-	}
-
 	/*
 	 * KSMBD does not implement a real change-notification backend.
 	 * Genuine SMB2 servers (and macOS smbfs) never complete a
-- 
2.55.0