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afs: Fix the nlink handling of dir-over-dir rename 

Fix rename of one directory over another such that the nlink on the deleted
directory is cleared to 0 rather than being decremented to 1.

This was causing the generic/035 xfstest to fail.

Fixes: e49c7b2f6d ("afs: Build an abstraction around an "operation" concept")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/r/162194384460.3999479.7605572278074191079.stgit@warthog.procyon.org.uk/ # v1
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2021-05-27 11:24:33 +01:00 committed by Linus Torvalds
parent d7c5303fbc
commit f610a5a29c
1 changed files with 3 additions and 1 deletions
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4
fs/afs/dir.c
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@ -1919,7 +1919,9 @@ static void afs_rename_edit_dir(struct afs_operation *op)
new_inode = d_inode(new_dentry);
if (new_inode) {
spin_lock(&new_inode->i_lock);
if (new_inode->i_nlink > 0)
if (S_ISDIR(new_inode->i_mode))
clear_nlink(new_inode);
else if (new_inode->i_nlink > 0)
drop_nlink(new_inode);
spin_unlock(&new_inode->i_lock);
}