static int
udf_root(struct mount *mp, int flags, struct vnode **vpp)
{
struct udf_mnt *udfmp;
ino_t id;
udfmp = VFSTOUDFFS(mp);
id = udf_getid(&udfmp->root_icb);
return (udf_vget(mp, id, flags, vpp));
}
int
udf_root(struct mount *mp, struct vnode **vpp)
{
struct umount *ump;
struct vnode *vp;
ino_t id;
int error;
ump = VFSTOUDFFS(mp);
id = udf_getid(&ump->um_root_icb);
error = udf_vget(mp, id, vpp);
if (error)
return (error);
vp = *vpp;
vp->v_flag |= VROOT;
return (0);
}
int
udf_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp)
{
struct buf *bp;
struct vnode *devvp;
struct udf_mnt *udfmp;
struct thread *td;
struct vnode *vp;
struct udf_node *unode;
struct file_entry *fe;
int error, sector, size;
error = vfs_hash_get(mp, ino, flags, curthread, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
/*
* We must promote to an exclusive lock for vnode creation. This
* can happen if lookup is passed LOCKSHARED.
*/
if ((flags & LK_TYPE_MASK) == LK_SHARED) {
flags &= ~LK_TYPE_MASK;
flags |= LK_EXCLUSIVE;
}
/*
* We do not lock vnode creation as it is believed to be too
* expensive for such rare case as simultaneous creation of vnode
* for same ino by different processes. We just allow them to race
* and check later to decide who wins. Let the race begin!
*/
td = curthread;
udfmp = VFSTOUDFFS(mp);
unode = uma_zalloc(udf_zone_node, M_WAITOK | M_ZERO);
if ((error = udf_allocv(mp, &vp, td))) {
printf("Error from udf_allocv\n");
uma_zfree(udf_zone_node, unode);
return (error);
}
unode->i_vnode = vp;
unode->hash_id = ino;
unode->udfmp = udfmp;
vp->v_data = unode;
lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
error = insmntque(vp, mp);
if (error != 0) {
uma_zfree(udf_zone_node, unode);
return (error);
}
error = vfs_hash_insert(vp, ino, flags, td, vpp, NULL, NULL);
if (error || *vpp != NULL)
return (error);
/*
* Copy in the file entry. Per the spec, the size can only be 1 block.
*/
sector = ino + udfmp->part_start;
devvp = udfmp->im_devvp;
if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) {
printf("Cannot read sector %d\n", sector);
vgone(vp);
vput(vp);
brelse(bp);
*vpp = NULL;
return (error);
}
fe = (struct file_entry *)bp->b_data;
if (udf_checktag(&fe->tag, TAGID_FENTRY)) {
printf("Invalid file entry!\n");
vgone(vp);
vput(vp);
brelse(bp);
*vpp = NULL;
return (ENOMEM);
}
size = UDF_FENTRY_SIZE + le32toh(fe->l_ea) + le32toh(fe->l_ad);
unode->fentry = malloc(size, M_UDFFENTRY, M_NOWAIT | M_ZERO);
if (unode->fentry == NULL) {
printf("Cannot allocate file entry block\n");
vgone(vp);
vput(vp);
brelse(bp);
*vpp = NULL;
return (ENOMEM);
}
bcopy(bp->b_data, unode->fentry, size);
brelse(bp);
bp = NULL;
switch (unode->fentry->icbtag.file_type) {
default:
vp->v_type = VBAD;
break;
case 4:
vp->v_type = VDIR;
break;
case 5:
vp->v_type = VREG;
break;
case 6:
vp->v_type = VBLK;
break;
case 7:
vp->v_type = VCHR;
break;
case 9:
vp->v_type = VFIFO;
vp->v_op = &udf_fifoops;
break;
case 10:
vp->v_type = VSOCK;
break;
case 12:
vp->v_type = VLNK;
break;
}
if (vp->v_type != VFIFO)
VN_LOCK_ASHARE(vp);
if (ino == udf_getid(&udfmp->root_icb))
vp->v_vflag |= VV_ROOT;
*vpp = vp;
return (0);
}