r23935: We were lying to the client in the case of POSIX_UNLINK

if a Windows client had the file open. We were setting
delete on close and returning "ok". The POSIX client then
believed the file was gone (and it wasn't). Fix this to
return SHARING_VIOLATION if there is an existing NTcreateX
open on the file and someone calls POSIX_UNLINK. Still one
more Cthon test to fix but getting closer now. Should
be in 3.0.25c also.
Jeremy.
(This used to be commit 24e625a615447c025b73fed2d3db03c1f11ae596)

1 files changed, 51 insertions, 16 deletions

diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c
index 080eb36b42..2d7d96e8b3 100644
--- a/source3/smbd/trans2.c
+++ b/source3/smbd/trans2.c
@@ -5723,7 +5723,10 @@ static NTSTATUS smb_posix_unlink(connection_struct *conn,
 	NTSTATUS status = NT_STATUS_OK;
 	files_struct *fsp = NULL;
 	uint16 flags = 0;
+	char del = 1;
 	int info = 0;
+	int i;
+	struct share_mode_lock *lck = NULL;
 
 	if (total_data < 2) {
 		return NT_STATUS_INVALID_PARAMETER;
@@ -5751,12 +5754,11 @@ static NTSTATUS smb_posix_unlink(connection_struct *conn,
 					DELETE_ACCESS,
 					FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
 					FILE_OPEN,
-					FILE_DELETE_ON_CLOSE,
+					0,
 					FILE_FLAG_POSIX_SEMANTICS|0777,
-					&info,				
+					&info,
 					&fsp);
 	} else {
-		char del = 1;
 
 		status = open_file_ntcreate(conn, req,
 				fname,
@@ -5769,26 +5771,59 @@ static NTSTATUS smb_posix_unlink(connection_struct *conn,
 				0, /* No oplock, but break existing ones. */
 				&info,
 				&fsp);
-		/* 
-		 * For file opens we must set the delete on close
-		 * after the open.
-		 */
+	}
 
-		if (!NT_STATUS_IS_OK(status)) {
-			return status;
-		}
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
 
-		status = smb_set_file_disposition_info(conn,
-							&del,
-							1,
-							fsp,
-							fname,
-							psbuf);
+	/*
+	 * Don't lie to client. If we can't really delete due to
+	 * non-POSIX opens return SHARING_VIOLATION.
+	 */
+
+	lck = get_share_mode_lock(NULL, fsp->file_id, NULL, NULL);
+	if (lck == NULL) {
+		DEBUG(0, ("smb_posix_unlink: Could not get share mode "
+			"lock for file %s\n", fsp->fsp_name));
+		close_file(fsp, NORMAL_CLOSE);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	/*
+	 * See if others still have the file open. If this is the case, then
+	 * don't delete. If all opens are POSIX delete we can set the delete
+	 * on close disposition.
+	 */
+	for (i=0; i<lck->num_share_modes; i++) {
+		struct share_mode_entry *e = &lck->share_modes[i];
+		if (is_valid_share_mode_entry(e)) {
+			if (e->flags & SHARE_MODE_FLAG_POSIX_OPEN) {
+				continue;
+			}
+			/* Fail with sharing violation. */
+			close_file(fsp, NORMAL_CLOSE);
+			TALLOC_FREE(lck);
+			return NT_STATUS_SHARING_VIOLATION;
+		}
 	}
 
+	/*
+	 * Set the delete on close.
+	 */
+	status = smb_set_file_disposition_info(conn,
+						&del,
+						1,
+						fsp,
+						fname,
+						psbuf);
+
 	if (!NT_STATUS_IS_OK(status)) {
+		close_file(fsp, NORMAL_CLOSE);
+		TALLOC_FREE(lck);
 		return status;
 	}
+	TALLOC_FREE(lck);
 	return close_file(fsp, NORMAL_CLOSE);
 }