static int
fuse_vnode_alloc(struct mount *mp,
struct thread *td,
uint64_t nodeid,
enum vtype vtyp,
struct vnode **vpp)
{
struct fuse_vnode_data *fvdat;
struct vnode *vp2;
int err = 0;
FS_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), LK_EXCLUSIVE, td, vpp,
fuse_vnode_cmp, &nodeid);
if (err)
return (err);
if (*vpp) {
MPASS((*vpp)->v_type == vtyp && (*vpp)->v_data != NULL);
FS_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);
}
lockmgr((*vpp)->v_vnlock, LK_EXCLUSIVE, NULL);
fuse_vnode_init(*vpp, fvdat, nodeid, vtyp);
err = insmntque(*vpp, mp);
ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
if (err) {
free(fvdat, M_FUSEVN);
*vpp = NULL;
return (err);
}
err = vfs_hash_insert(*vpp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE,
td, &vp2, fuse_vnode_cmp, &nodeid);
if (err)
return (err);
if (vp2 != NULL) {
*vpp = vp2;
return (0);
}
ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
return (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);
}