int
ntfs_lookup(void *v)
{
struct vop_lookup_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap = v;
struct vnode *dvp = ap->a_dvp;
struct ntnode *dip = VTONT(dvp);
struct ntfsmount *ntmp = dip->i_mp;
struct componentname *cnp = ap->a_cnp;
kauth_cred_t cred = cnp->cn_cred;
int error;
dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n",
(int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen,
(unsigned long long)dip->i_number));
error = VOP_ACCESS(dvp, VEXEC, cred);
if(error)
return (error);
if ((cnp->cn_flags & ISLASTCN) &&
(dvp->v_mount->mnt_flag & MNT_RDONLY) &&
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
return (EROFS);
/*
* We now have a segment name to search for, and a directory
* to search.
*
* Before tediously performing a linear scan of the directory,
* check the name cache to see if the directory/name pair
* we are looking for is known already.
*/
if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen,
cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) {
return *ap->a_vpp == NULLVP ? ENOENT : 0;
}
if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
dprintf(("ntfs_lookup: faking . directory in %llu\n",
(unsigned long long)dip->i_number));
vref(dvp);
*ap->a_vpp = dvp;
error = 0;
} else if (cnp->cn_flags & ISDOTDOT) {
struct ntvattr *vap;
dprintf(("ntfs_lookup: faking .. directory in %llu\n",
(unsigned long long)dip->i_number));
VOP_UNLOCK(dvp);
error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
if (error) {
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
return (error);
}
dprintf(("ntfs_lookup: parentdir: %d\n",
vap->va_a_name->n_pnumber));
error = VFS_VGET(ntmp->ntm_mountp,
vap->va_a_name->n_pnumber,ap->a_vpp);
ntfs_ntvattrrele(vap);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
if (error) {
return (error);
}
} else {
error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
if (error) {
dprintf(("ntfs_ntlookupfile: returned %d\n", error));
return (error);
}
dprintf(("ntfs_lookup: found ino: %llu\n",
(unsigned long long)VTONT(*ap->a_vpp)->i_number));
}
cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen,
cnp->cn_flags);
return error;
}
int
ntfs_lookup(void *v)
{
struct vop_lookup_args *ap = v;
struct vnode *dvp = ap->a_dvp;
struct ntnode *dip = VTONT(dvp);
struct ntfsmount *ntmp = dip->i_mp;
struct componentname *cnp = ap->a_cnp;
struct ucred *cred = cnp->cn_cred;
int error;
int lockparent = cnp->cn_flags & LOCKPARENT;
struct proc *p = cnp->cn_proc;
#if NTFS_DEBUG
int wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT);
#endif
dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
(int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
dip->i_number, lockparent, wantparent));
error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_proc);
if(error)
return (error);
if ((cnp->cn_flags & ISLASTCN) &&
(dvp->v_mount->mnt_flag & MNT_RDONLY) &&
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
return (EROFS);
/*
* We now have a segment name to search for, and a directory
* to search.
*
* Before tediously performing a linear scan of the directory,
* check the name cache to see if the directory/name pair
* we are looking for is known already.
*/
if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0)
return (error);
if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
dprintf(("ntfs_lookup: faking . directory in %d\n",
dip->i_number));
vref(dvp);
*ap->a_vpp = dvp;
error = 0;
} else if (cnp->cn_flags & ISDOTDOT) {
struct ntvattr *vap;
dprintf(("ntfs_lookup: faking .. directory in %d\n",
dip->i_number));
VOP_UNLOCK(dvp, 0, p);
cnp->cn_flags |= PDIRUNLOCK;
error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
if(error)
return (error);
dprintf(("ntfs_lookup: parentdir: %d\n",
vap->va_a_name->n_pnumber));
error = VFS_VGET(ntmp->ntm_mountp,
vap->va_a_name->n_pnumber,ap->a_vpp);
ntfs_ntvattrrele(vap);
if (error) {
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p) == 0)
cnp->cn_flags &= ~PDIRUNLOCK;
return (error);
}
if (lockparent && (cnp->cn_flags & ISLASTCN)) {
error = vn_lock(dvp, LK_EXCLUSIVE, p);
if (error) {
vput( *(ap->a_vpp) );
return (error);
}
cnp->cn_flags &= ~PDIRUNLOCK;
}
} else {
error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp, p);
if (error) {
dprintf(("ntfs_ntlookupfile: returned %d\n", error));
return (error);
}
dprintf(("ntfs_lookup: found ino: %d\n",
VTONT(*ap->a_vpp)->i_number));
if(!lockparent || (cnp->cn_flags & ISLASTCN) == 0) {
VOP_UNLOCK(dvp, 0, p);
cnp->cn_flags |= PDIRUNLOCK;
}
}
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, *ap->a_vpp, cnp);
return (error);
}
