This fixes 2 problems introduced by
6feeeab0bc:
1) If name_to_handle_at returns ENOSYS for the child, we'll wrongly
return -ENOSYS when it returns the same for the parent. Immediately
jump to the fallback logic when we get ENOSYS.
2) If name_to_handle_at returns EOPNOTSUPP for the child but suceeds
for the parent, we'll be comparing an uninitialized value (mount_id) to
an initialized value (mount_id_parent). Initialize the mount_id
variables to invalid mount_ids to avoid this.
.handle.handle_bytes = MAX_HANDLE_SZ
};
.handle.handle_bytes = MAX_HANDLE_SZ
};
- int mount_id, mount_id_parent;
+ int mount_id = -1, mount_id_parent = -1;
_cleanup_free_ char *parent = NULL;
struct stat a, b;
int r;
_cleanup_free_ char *parent = NULL;
struct stat a, b;
int r;
r = name_to_handle_at(AT_FDCWD, t, &h.handle, &mount_id, allow_symlink ? AT_SYMLINK_FOLLOW : 0);
if (r < 0) {
r = name_to_handle_at(AT_FDCWD, t, &h.handle, &mount_id, allow_symlink ? AT_SYMLINK_FOLLOW : 0);
if (r < 0) {
- if (IN_SET(errno, ENOSYS, EOPNOTSUPP))
+ if (errno == ENOSYS)
+ /* This kernel does not support name_to_handle_at()
+ * fall back to the traditional stat() logic. */
+ goto fallback;
+ else if (errno == EOPNOTSUPP)
/* This kernel or file system does not support
* name_to_handle_at(), hence fallback to the
* traditional stat() logic */
/* This kernel or file system does not support
* name_to_handle_at(), hence fallback to the
* traditional stat() logic */