Date: Thu, 2 Apr 2009 16:54:50 +0530 From: "Cherukuri, Balaji" <Balaji.Cherukuri@netapp.com> To: <freebsd-questions@FreeBSD.org> Cc: "Ramani, Balaji" <Balaji.Ramani@netapp.com> Subject: regardinf Virtual File system VOP_RENAME_APV function. Message-ID: <4C74F7F7256204408580B101D5A7CC0D06A3CDBD@BTCMVEXC1-PRD.hq.netapp.com>
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Hi FreeBSD Team,
=20
I am implementing a stackable file system similar to NULLFS and I have =
question on VOP_RENAME_APV function.
=20
In VOP_RENAME_APV function:
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VOP_RENAME_APV(struct vop_vector *vop, struct vop_rename_args *a)
{
int rc;
=20
....
if (vop->vop_rename !=3D NULL)
rc =3D vop->vop_rename(a);
else
rc =3D vop->vop_bypass(&a->a_gen);
....
vop_rename_post(a, rc);
return (rc);
}
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I want to know that what is the importance of vop_rename_post function. =
Actually I returned "EXDEV" from my file system, but still =
vop_rename_post function is doing rename operation.
=20
I want to know whether it is having default implementation of rename =
functionality, can I use this function for rename operation directly =
because I do not have anything new to do in rename functionality.
=20
Please let me know, Is there any document which will talk how to write =
filesystem in FreeBSD environment?=20
=20
Thanks in advance,
BalajiC
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