Date: Fri, 21 Jun 2002 20:58:19 -0500 (CDT) From: Nitin Bahadur <bnitin@cs.wisc.edu> To: hackers@freebsd.org Subject: kernel file creation query... Message-ID: <Pine.GSO.4.21.0206212052130.16911-100000@alumni.cs.wisc.edu>
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Hi,
This might be a lame query...but ...
I am trying to create a file from kernel space given
the vnode of the parent directory using VOP_CREATE.
The code is as below.
int make_file(struct vnode *dvp, struct vnode **vpp, struct proc *p, char
*name)
{
struct componentname cnp;
struct vattr va, *vap = &va;
/* set component name */
cnp.cn_nameiop = CREATE;
cnp.cn_flags = LOCKLEAF;
cnp.cn_proc = p;
cnp.cn_cred = p->p_ucred;
cnp.cn_pnbuf = cnp.cn_nameptr = name;
cnp.cn_namelen = cnp.cn_consume = strlen(name);
/* set attributes */
VATTR_NULL(vap);
vap->va_type = VREG;
return VOP_CREATE(dvp, vpp, &cnp, vap);
}
Now the file is getting created, but if I do an ls on its parent
directory, I get something like;
foo: Bad file descriptor.
I am sure I am doing something wrong or missing something. I tried looking
at the nfs and kern code, but couldn't figure out much.
Can you experts just correct me..
thanks in advance
nitin
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