[PATCH] smb/client: fix incorrect nlink returned by fstat()

From: ChenXiaoSong <[email protected]>

Reproducer:

  1. mount -t cifs //${server_ip}/export /mnt
  2. touch /mnt/file1; ln /mnt/file1 /mnt/file2; ln /mnt/file1 /mnt/file3
  3. C program: int fd = open("/mnt/file1", O_RDONLY);
  4. C program: struct stat stbuf; fstat(fd, &stbuf);
                stbuf.st_nlink is always 1, should be 3

Signed-off-by: ChenXiaoSong <[email protected]>
---
 fs/smb/client/smb2pdu.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index d058584b8f05..70b3beb96aff 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -3371,15 +3371,19 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
 #endif /* CIFS_DEBUG2 */
 
 	if (buf) {
-		buf->CreationTime = rsp->CreationTime;
-		buf->LastAccessTime = rsp->LastAccessTime;
-		buf->LastWriteTime = rsp->LastWriteTime;
-		buf->ChangeTime = rsp->ChangeTime;
-		buf->AllocationSize = rsp->AllocationSize;
-		buf->EndOfFile = rsp->EndofFile;
-		buf->Attributes = rsp->FileAttributes;
-		buf->NumberOfLinks = cpu_to_le32(1);
-		buf->DeletePending = 0; /* successful open = not delete pending */
+		int qrc = SMB2_query_info(xid, tcon, oparms->fid->persistent_fid,
+					  oparms->fid->volatile_fid, buf);
+		if (qrc) {
+			buf->CreationTime = rsp->CreationTime;
+			buf->LastAccessTime = rsp->LastAccessTime;
+			buf->LastWriteTime = rsp->LastWriteTime;
+			buf->ChangeTime = rsp->ChangeTime;
+			buf->AllocationSize = rsp->AllocationSize;
+			buf->EndOfFile = rsp->EndofFile;
+			buf->Attributes = rsp->FileAttributes;
+			buf->NumberOfLinks = cpu_to_le32(1);
+			buf->DeletePending = 0; /* successful open = not delete pending */
+		}
 	}
 
 
-- 
2.54.0