int
sysvbfs_create(void *arg)
{
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *a = arg;
struct sysvbfs_node *bnode = a->a_dvp->v_data;
struct sysvbfs_mount *bmp = bnode->bmp;
struct bfs *bfs = bmp->bfs;
struct mount *mp = bmp->mountp;
struct bfs_dirent *dirent;
struct bfs_fileattr attr;
struct vattr *va = a->a_vap;
kauth_cred_t cr = a->a_cnp->cn_cred;
int err = 0;
DPRINTF("%s: %s\n", __func__, a->a_cnp->cn_nameptr);
KDASSERT(a->a_vap->va_type == VREG);
attr.uid = kauth_cred_geteuid(cr);
attr.gid = kauth_cred_getegid(cr);
attr.mode = va->va_mode;
if ((err = bfs_file_create(bfs, a->a_cnp->cn_nameptr, 0, 0, &attr))
!= 0) {
DPRINTF("%s: bfs_file_create failed.\n", __func__);
goto unlock_exit;
}
if (!bfs_dirent_lookup_by_name(bfs, a->a_cnp->cn_nameptr, &dirent))
panic("no dirent for created file.");
if ((err = sysvbfs_vget(mp, dirent->inode, a->a_vpp)) != 0) {
DPRINTF("%s: sysvbfs_vget failed.\n", __func__);
goto unlock_exit;
}
bnode = (*a->a_vpp)->v_data;
bnode->update_ctime = true;
bnode->update_mtime = true;
bnode->update_atime = true;
unlock_exit:
/* unlock parent directory */
vput(a->a_dvp); /* locked at sysvbfs_lookup(); */
return err;
}
int
sysvbfs_lookup(void *arg)
{
struct vop_lookup_v2_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *a = arg;
struct vnode *v = a->a_dvp;
struct sysvbfs_node *bnode = v->v_data;
struct bfs *bfs = bnode->bmp->bfs; /* my filesystem */
struct vnode *vpp = NULL;
struct bfs_dirent *dirent = NULL;
struct componentname *cnp = a->a_cnp;
int nameiop = cnp->cn_nameiop;
const char *name = cnp->cn_nameptr;
int namelen = cnp->cn_namelen;
int error;
DPRINTF("%s: %s op=%d %d\n", __func__, name, nameiop,
cnp->cn_flags);
*a->a_vpp = NULL;
KASSERT((cnp->cn_flags & ISDOTDOT) == 0);
if ((error = VOP_ACCESS(a->a_dvp, VEXEC, cnp->cn_cred)) != 0) {
return error; /* directory permission. */
}
/* Deny last component write operation on a read-only mount */
if ((cnp->cn_flags & ISLASTCN) && (v->v_mount->mnt_flag & MNT_RDONLY) &&
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
return EROFS;
if (namelen == 1 && name[0] == '.') { /* "." */
vref(v);
*a->a_vpp = v;
} else { /* Regular file */
if (!bfs_dirent_lookup_by_name(bfs, cnp->cn_nameptr,
&dirent)) {
if (nameiop != CREATE && nameiop != RENAME) {
DPRINTF("%s: no such a file. (1)\n",
__func__);
return ENOENT;
}
if ((error = VOP_ACCESS(v, VWRITE, cnp->cn_cred)) != 0)
return error;
return EJUSTRETURN;
}
/* Allocate v-node */
if ((error = sysvbfs_vget(v->v_mount, dirent->inode, &vpp)) != 0) {
DPRINTF("%s: can't get vnode.\n", __func__);
return error;
}
VOP_UNLOCK(vpp);
*a->a_vpp = vpp;
}
return 0;
}