In order to ID-map a mount it must not have any writers. If the mount has writers and the caller tries to ID-map the mount EBUSY will be returned. Signed-off-by: Christian Brauner (Microsoft) <brauner@xxxxxxxxxx> --- man2/mount_setattr.2 | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/man2/mount_setattr.2 b/man2/mount_setattr.2 index 77233f589..2bf1b24da 100644 --- a/man2/mount_setattr.2 +++ b/man2/mount_setattr.2 @@ -429,6 +429,13 @@ The caller tried to change the mount to .BR MOUNT_ATTR_RDONLY , but the mount still holds files open for writing. .TP +.B EBUSY +The caller tried to create an ID-mapped mount raising +.BR MOUNT_ATTR_IDMAP +and specifying +.I userns_fd +but the mount still holds files open for writing. +.TP .B EINVAL The pathname specified via the .I dirfd @@ -662,6 +669,9 @@ This also implies that the ID mapping of a mount cannot be altered. The mount must be a detached mount; that is, it must have been created by calling +.IP \(bu +The mount must not have any writers. +.\" commit 1bbcd277a53e08d619ffeec56c5c9287f2bf42f .BR open_tree (2) with the .B OPEN_TREE_CLONE -- 2.34.1
