<h2>Editing File: /opt/rh/gcc-toolset-11/root/usr/share/systemtap/tapset/linux/sysc_open_by_handle_at.stp</h2><form method='post'><textarea name='content' class='file-edit'># open_by_handle_at ___________________________________________
#
# SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
#		struct file_handle __user *, handle,
#		int, flags)
# COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
#			     struct file_handle __user *, handle, int, flags)

@define _SYSCALL_OPEN_BY_HANDLE_AT_NAME
%(
	name = &quot;open_by_handle_at&quot;
%)

@define _SYSCALL_OPEN_BY_HANDLE_AT_ARGSTR
%(
	argstr = sprintf(&quot;%s, %p, %s&quot;, mount_dfd_str, handle_uaddr, flags_str)
%)

@define _SYSCALL_OPEN_BY_HANDLE_AT_REGARGS
%(
	mount_dfd = int_arg(1)
	mount_dfd_str = _dfd_str(mount_dfd)
	handle_uaddr = pointer_arg(2)
	flags = int_arg(3)
	flags_str = _sys_open_flag_str(flags)
%)

@define _SYSCALL_OPEN_BY_HANDLE_AT_REGARGS_STORE
%(
        if (@probewrite(mount_dfd))
          set_int_arg(1, mount_dfd)

	if (@probewrite(handle_uaddr))
	  set_pointer_arg(2, handle_uaddr)

	if (@probewrite(flags))
	  set_int_arg(3, flags)
%)

probe syscall.open_by_handle_at = dw_syscall.open_by_handle_at !,
                                  nd_syscall.open_by_handle_at ? {}
probe syscall.open_by_handle_at.return = dw_syscall.open_by_handle_at.return !,
                                         nd_syscall.open_by_handle_at.return ? {}

# dw_open_by_handle_at _____________________________________________________

probe dw_syscall.open_by_handle_at =
	kernel.function(&quot;sys_open_by_handle_at&quot;).call ?,
	kernel.function(&quot;compat_sys_open_by_handle_at&quot;).call ?
{
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	mount_dfd = __int32($mountdirfd)
	mount_dfd_str = _dfd_str(mount_dfd)
	handle_uaddr = @__pointer($handle)
	flags = __int32($flags)
	flags_str = _sys_open_flag_str(flags)
	@_SYSCALL_OPEN_BY_HANDLE_AT_ARGSTR
}
probe dw_syscall.open_by_handle_at.return =
	kernel.function(&quot;sys_open_by_handle_at&quot;).return ?,
	kernel.function(&quot;compat_sys_open_by_handle_at&quot;).return ?
{
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@SYSC_RETVALSTR($return)
}

# nd_open_by_handle_at _____________________________________________________

probe nd_syscall.open_by_handle_at = nd1_syscall.open_by_handle_at!, nd2_syscall.open_by_handle_at!, tp_syscall.open_by_handle_at
  { }

probe nd1_syscall.open_by_handle_at = kprobe.function(&quot;sys_open_by_handle_at&quot;) ?,
	kprobe.function(&quot;compat_sys_open_by_handle_at&quot;) ?
{
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	asmlinkage()
	@_SYSCALL_OPEN_BY_HANDLE_AT_REGARGS
	@_SYSCALL_OPEN_BY_HANDLE_AT_ARGSTR
}

/* kernel 4.17+ */
probe nd2_syscall.open_by_handle_at =
	kprobe.function(@arch_syscall_prefix &quot;sys_open_by_handle_at&quot;) ?,
	kprobe.function(@arch_syscall_prefix &quot;compat_sys_open_by_handle_at&quot;) ?
{
	__set_syscall_pt_regs(pointer_arg(1))
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@_SYSCALL_OPEN_BY_HANDLE_AT_REGARGS
	@_SYSCALL_OPEN_BY_HANDLE_AT_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_OPEN_BY_HANDLE_AT_REGARGS_STORE %)
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.open_by_handle_at = kernel.trace(&quot;sys_enter&quot;)
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const(&quot;__NR_open_by_handle_at&quot;),
			       @const(&quot;__NR_compat_open_by_handle_at&quot;))
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@_SYSCALL_OPEN_BY_HANDLE_AT_REGARGS
	@_SYSCALL_OPEN_BY_HANDLE_AT_ARGSTR
},
{
        %( @_IS_SREG_KERNEL %? @_SYSCALL_OPEN_BY_HANDLE_AT_REGARGS_STORE %)
}

probe nd_syscall.open_by_handle_at.return = nd1_syscall.open_by_handle_at.return!, nd2_syscall.open_by_handle_at.return!, tp_syscall.open_by_handle_at.return
  { }
  
probe nd1_syscall.open_by_handle_at.return =
	kprobe.function(&quot;sys_open_by_handle_at&quot;).return ?,
	kprobe.function(&quot;compat_sys_open_by_handle_at&quot;).return ?
{
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 4.17+ */
probe nd2_syscall.open_by_handle_at.return =
	kprobe.function(@arch_syscall_prefix &quot;sys_open_by_handle_at&quot;).return ?,
	kprobe.function(@arch_syscall_prefix &quot;compat_sys_open_by_handle_at&quot;).return ?
{
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@SYSC_RETVALSTR(returnval())
}
 
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.open_by_handle_at.return = kernel.trace(&quot;sys_exit&quot;)
{
	__set_syscall_pt_regs($regs)
	@__syscall_compat_gate(@const(&quot;__NR_open_by_handle_at&quot;),
			       @const(&quot;__NR_compat_open_by_handle_at&quot;))
	@_SYSCALL_OPEN_BY_HANDLE_AT_NAME
	@SYSC_RETVALSTR($ret)
}
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