apfs_fs_snapshot_rename.c

signed __int64 __fastcall apfs_snapshot_rename_raw(rename_call_struct *args)
{
  void *v_mount; // x0
  __int64 fs_private; // x19
  snap_info_args_struct *oldsnap_info; // x8
  __int64 oldname_len; // x20
  unsigned __int8 *oldname; // x21
  snap_info_args_struct *newsnap_info; // x8
  unsigned __int64 namelen; // x22
  unsigned __int8 *newname; // x23
  int v10; // w8
  int v11; // w9
  signed __int64 v13; // x10
  char *v14; // x11
  char *v15; // x12
  char v16; // t1
  char v17; // t1
  __int64 ret; // x0 MAPDST
  void *snap_vnode; // x25
  signed int a3; // [xsp+44h] [xbp-6Ch]
  __int64 snap_data_out; // [xsp+48h] [xbp-68h]
  __int64 result; // [xsp+50h] [xbp-60h]
  __int64 fsnode; // [xsp+58h] [xbp-58h] MAPDST
  __int64 v29; // [xsp+60h] [xbp-50h]
  __int64 snap_xid; // [xsp+68h] [xbp-48h]

  v_mount = vnode_mount_stub(args->vnode);
  fs_private = vfs_fsprivate(v_mount);
  v29 = 0LL;
  result = 0LL;
  fsnode = 0LL;
  snap_data_out = 0LL;
  if ( *(*(fs_private + 0xB8) + 0x11CLL)
    || *(vnode_fsnode_stub(args->vnode) + 8)
    || *vnode_fsnode_stub(args->vnode) != 1
    || *(vnode_fsnode_stub(args->fvp) + 8)
    || *vnode_fsnode_stub(args->fvp) != 1 )
  {
    return 1LL;
  }
  oldsnap_info = args->oldsnap_info;
  oldname_len = oldsnap_info->oldname_len;
  oldname = oldsnap_info->oldname_buf;
  newsnap_info = args->newsnap_info;
  namelen = newsnap_info->oldname_len;
  newname = newsnap_info->oldname_buf;
  v10 = *oldname;
  if ( v10 == 46 && (oldname_len == 1 || oldname_len == 2 && oldname[1] == 46) )
    return 22LL;
  v11 = *newname;
  if ( v11 == 46 && (namelen == 1 || namelen == 2 && newname[1] == 46) )
    return 22LL;
  if ( namelen > 255 )
    return 63LL;
  if ( oldname_len == namelen )
  {
    if ( oldname_len )
    {
      v13 = 1 - oldname_len;
      v14 = (newname + 1);
      v15 = (oldname + 1);
      while ( v10 == v11 )
      {
        if ( !v11 || !v13 )
          return 22LL;
        v16 = *v15++;
        LOBYTE(v10) = v16;
        v17 = *v14++;
        LOBYTE(v11) = v17;
        ++v13;
      }
      goto LABEL_23;
    }
    return 22LL;
  }
LABEL_23:
  if ( apfs_find_snap_from_name(newname, namelen, 0LL, 0LL) & 1 )
    return 1LL;
  sub_FFFFFFF006AA1CDC(*(fs_private + 7872));
  ++*(fs_private + 7864);
  sub_FFFFFFF006AA1CF4(*(fs_private + 7872));
  sub_FFFFFFF006AA1D18(*(fs_private + 7840));
  sub_FFFFFFF006A28870(fs_private);
  sub_FFFFFFF006AA1D30(*(fs_private + 7848));
  ret = sub_FFFFFFF006A1E6D8(fs_private, newname, namelen, &result);
  if ( ret != 2 )
  {
    if ( !ret )
    {
      sub_FFFFFFF006A5ED28(result);
      ret = 17LL;
    }
    goto LABEL_47;
  }
  if ( apfs_find_snap_from_name(oldname, oldname_len, &a3, &snap_xid) )
  {
    if ( a3 != 1 )
    {
      ret = 2LL;
      goto LABEL_47;
    }
    ret = sub_FFFFFFF006A1E5A0(fs_private, snap_xid, &fsnode, &snap_data_out);
  }
  else
  {
    ret = apfs_lookup_snap(fs_private, oldname, oldname_len, &fsnode, &snap_data_out);
  }
  if ( ret )
  {
LABEL_35:
    if ( fsnode )
      sub_FFFFFFF006A5ED28(fsnode);
    goto LABEL_47;
  }
  snap_vnode = apfs_jhash_getvnode(fs_private, *(fs_private + 0x1B8), *(fsnode + 8), 1LL, 0LL, 0LL);
  if ( snap_vnode && (sub_FFFFFFF006A5ED28(fsnode), fsnode = vnode_fsnode_stub(snap_vnode), *(fsnode + 49) & 0x40) )
  {
    ret = 1LL;
  }
  else
  {
    v29 = 0LL;
    ret = fs_tx_enter_recursively(fs_private, 1LL, 4LL, 0LL, &v29);
    if ( !ret )
    {
      ret = fs_rename_snapshot(fs_private, fsnode, snap_data_out, newname, namelen, v29);
      if ( ret )
        vprintf_sth_stub(aSDFsRenameSnap, aApfsSnapVnopRe_0, 898LL, oldname, oldname_len, newname, namelen, ret);
    }
    if ( !snap_vnode )
      goto LABEL_35;
  }
  vnode_put_stub(snap_vnode);
LABEL_47:
  if ( snap_data_out )
    sub_FFFFFFF006A5ED28(snap_data_out);
  if ( v29 )
  {
    sub_FFFFFFF006A66B50(fs_private, 1LL, 4LL, 0LL);
    v29 = 0LL;
  }
  sub_FFFFFFF006AA1D54(*(fs_private + 7840));
  sub_FFFFFFF006AA1D60(*(fs_private + 7848));
  return ret;
}