e2fsprogs-nlinks.patch

e2fsprogs-nlinks.patch

Add support for the DIR_NLINK feature.

This patch includes the changes required to e2fsck to understand the
nlink count changes made in the kernel. In pass2, while counting the
links for a directory, if the link count exceeds 65000, its permanently
set to EXT2_LINK_MAX + 10. In pass4, when the counted and actual nlink
counts are compared, e2fsck does not flag an error if counted links =
EXT2_NLINK_MAX + 10 and existing link count is 1.

It also handles the case when a directory had more than 65000 subdirs
and they were later deleted. The nlink count of such a directory remains
1. In pass4 if counted links are 2 and if existing nlink count = 1,
e2fsck corrects the nlink count without displaying any errors.

The file hard link count is also increased to 65000, but this cannot be
exceeded.

Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Kalpak Shah <kalpak@clusterfs.com>