Commit 1da4bd9f authored Dec 11, 2019 by David Howells

afs: Fix creation calls in the dynamic root to fail with EOPNOTSUPP

Fix the lookup method on the dynamic root directory such that creation
calls, such as mkdir, open(O_CREAT), symlink, etc. fail with EOPNOTSUPP
rather than failing with some odd error (such as EEXIST).

lookup() itself tries to create automount directories when it is invoked.
These are cached locally in RAM and not committed to storage.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
Tested-by: Jonathan Billings <jsbillings@jsbillings.org>

parent 158d5833

fs/afs/dynroot.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -136,6 +136,9 @@ static struct dentry afs_dynroot_lookup(struct inode dir, struct dentry *dentr

	ASSERTCMP(d_inode(dentry), ==, NULL);		ASSERTCMP(d_inode(dentry), ==, NULL);

			if (flags & LOOKUP_CREATE)
			return ERR_PTR(-EOPNOTSUPP);

	if (dentry->d_name.len >= AFSNAMEMAX) {		if (dentry->d_name.len >= AFSNAMEMAX) {
	_leave(" = -ENAMETOOLONG");		_leave(" = -ENAMETOOLONG");
	return ERR_PTR(-ENAMETOOLONG);		return ERR_PTR(-ENAMETOOLONG);

Admin message