Exemplo n.º 1
0
/*
    struct vnop_reclaim_args {
	struct vnode *a_vp;
	struct thread *a_td;
    };
*/
static int
fuse_vnop_reclaim(struct vop_reclaim_args *ap)
{
	struct vnode *vp = ap->a_vp;
	struct thread *td = ap->a_td;

	struct fuse_vnode_data *fvdat = VTOFUD(vp);
	struct fuse_filehandle *fufh = NULL;

	int type;

	if (!fvdat) {
		panic("FUSE: no vnode data during recycling");
	}
	FS_DEBUG("inode=%ju\n", (uintmax_t)VTOI(vp));

	for (type = 0; type < FUFH_MAXTYPE; type++) {
		fufh = &(fvdat->fufh[type]);
		if (FUFH_IS_VALID(fufh)) {
			printf("FUSE: vnode being reclaimed but fufh (type=%d) is valid",
			    type);
			fuse_filehandle_close(vp, type, td, NULL);
		}
	}

	if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {
		fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
		    fvdat->nlookup);
	}
	fuse_vnode_setparent(vp, NULL);
	cache_purge(vp);
	vfs_hash_remove(vp);
	vnode_destroy_vobject(vp);
	fuse_vnode_destroy(vp);

	return 0;
}
Exemplo n.º 2
0
static int
fuse_vnode_alloc(struct mount *mp,
                 struct thread *td,
                 uint64_t nodeid,
                 enum vtype vtyp,
                 struct vnode **vpp)
{
    const int lkflags = LK_EXCLUSIVE | LK_RETRY;
    struct fuse_vnode_data *fvdat;
    struct vnode *vp2;
    int err = 0;

    DEBUG("been asked for vno #%ju\n", (uintmax_t)nodeid);

    if (vtyp == VNON) {
        return EINVAL;
    }

    *vpp = NULL;
    err = vfs_hash_get(mp, fuse_vnode_hash(nodeid), lkflags, td, vpp,
                       fuse_vnode_cmp, &nodeid);
    if (err)
        return (err);

    if (*vpp) {
        MPASS((*vpp)->v_type == vtyp && (*vpp)->v_data != NULL);
        DEBUG("vnode taken from hash\n");
        return (0);
    }

    fvdat = malloc(sizeof(*fvdat), M_FUSEVN, M_WAITOK | M_ZERO);
    err = getnewvnode("fuse", mp, &fuse_vnops, vpp);
    if (err) {
        free(fvdat, M_FUSEVN);
        return (err);
    }

    vn_lock(*vpp, lkflags);
    err = insmntque(*vpp, mp);
    ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
    if (err) {
        VOP_UNLOCK(*vpp, 0);
        free(fvdat, M_FUSEVN);
        *vpp = NULL;
        return (err);
    }

    fuse_vnode_init(*vpp, fvdat, nodeid, vtyp);
    err = vfs_hash_insert(*vpp, fuse_vnode_hash(nodeid), lkflags,
                          td, &vp2, fuse_vnode_cmp, &nodeid);

    if (err) {
        VOP_UNLOCK(*vpp, 0);
        fuse_vnode_destroy(*vpp);
        *vpp = NULL;
        return (err);
    }

    /*
     * XXXIP: Prevent silent vnode reuse. It may happen because several fuse
     * filesystems ignore inode numbers
     */
    KASSERT(vp2 == NULL,
            ("vfs hash collision for node #%ju\n", (uintmax_t)nodeid));
    ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");

    return (0);
}