From: Jeremy Allison <jra@samba.org>
Date: Thu, 8 Aug 2019 22:55:04 +0000 (-0700)
Subject: s3: VFS: vfs_ceph_snapshots: Make mkdir return errno = EROFS on a shadow copy path.
X-Git-Tag: tdb-1.4.2~193
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9c2c941492a363a96482fe17cfafff1494586b31;p=thirdparty%2Fsamba.git

s3: VFS: vfs_ceph_snapshots: Make mkdir return errno = EROFS on a shadow copy path.

smbd has no business modifying a shadow copy filesystem, it should be read-only.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
---

diff --git a/source3/modules/vfs_ceph_snapshots.c b/source3/modules/vfs_ceph_snapshots.c
index c23779956e6..832d0ab3fd9 100644
--- a/source3/modules/vfs_ceph_snapshots.c
+++ b/source3/modules/vfs_ceph_snapshots.c
@@ -1283,40 +1283,20 @@ static int ceph_snap_gmt_mkdir(vfs_handle_struct *handle,
 				mode_t mode)
 {
 	time_t timestamp = 0;
-	char stripped[PATH_MAX + 1];
-	char conv[PATH_MAX + 1];
 	int ret;
-	struct smb_filename *new_fname;
-	int saved_errno;
 
 	ret = ceph_snap_gmt_strip_snapshot(handle,
 					csmb_fname->base_name,
-					&timestamp, stripped, sizeof(stripped));
-	if (ret < 0) {
-		errno = -ret;
-		return -1;
-	}
-	if (timestamp == 0) {
-		return SMB_VFS_NEXT_MKDIR(handle, csmb_fname, mode);
-	}
-	ret = ceph_snap_gmt_convert_dir(handle, stripped,
-					timestamp, conv, sizeof(conv));
+					&timestamp, NULL, 0);
 	if (ret < 0) {
 		errno = -ret;
 		return -1;
 	}
-	new_fname = cp_smb_filename(talloc_tos(), csmb_fname);
-	if (new_fname == NULL) {
-		errno = ENOMEM;
+	if (timestamp != 0) {
+		errno = EROFS;
 		return -1;
 	}
-	new_fname->base_name = conv;
-
-	ret = SMB_VFS_NEXT_MKDIR(handle, new_fname, mode);
-	saved_errno = errno;
-	TALLOC_FREE(new_fname);
-	errno = saved_errno;
-	return ret;
+	return SMB_VFS_NEXT_MKDIR(handle, csmb_fname, mode);
 }
 
 static int ceph_snap_gmt_rmdir(vfs_handle_struct *handle,