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# fallocate ____________________________________________________
#
# SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
@define _SYSCALL_FALLOCATE_NAME
%(
name = "fallocate"
%)
@define _SYSCALL_FALLOCATE_ARGSTR
%(
argstr = sprintf("%d, %s, %#x, %u", fd, mode_str, offset, len)
%)
probe syscall.fallocate = dw_syscall.fallocate !, nd_syscall.fallocate ? {}
probe syscall.fallocate.return = dw_syscall.fallocate.return !, nd_syscall.fallocate.return ? {}
# dw_fallocate _____________________________________________________
probe dw_syscall.fallocate = kernel.function("sys_fallocate").call ?
{
@__syscall_gate_compat_simple
@_SYSCALL_FALLOCATE_NAME
fd = __int32($fd)
mode = __uint32($mode)
mode_str = _stp_fallocate_mode_str(mode)
offset = $offset
len = $len
@_SYSCALL_FALLOCATE_ARGSTR
}
probe dw_syscall.fallocate.return = kernel.function("sys_fallocate").return ?
{
@__syscall_gate_compat_simple
@_SYSCALL_FALLOCATE_NAME
@SYSC_RETVALSTR($return)
}
# nd_fallocate _____________________________________________________
probe nd_syscall.fallocate = nd1_syscall.fallocate!, nd2_syscall.fallocate!, tp_syscall.fallocate
{ }
probe nd1_syscall.fallocate = kprobe.function("sys_fallocate") ?
{
asmlinkage()
@__syscall_gate_compat_simple
@_SYSCALL_FALLOCATE_NAME
fd = int_arg(1)
mode = uint_arg(2)
mode_str = _stp_fallocate_mode_str(mode)
%( CONFIG_64BIT == "y" %?
offset = longlong_arg(3)
len = longlong_arg(4)
%:
# On a 32-bit kernel, 'long long' arguments take the space of
# 2 arguments, so we have to adjust the following argument
# numbers.
offset = longlong_arg(3)
len = longlong_arg(5)
%)
@_SYSCALL_FALLOCATE_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fallocate = kprobe.function(@arch_syscall_prefix "sys_fallocate") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FALLOCATE_NAME
fd = int_arg(1)
mode = uint_arg(2)
mode_str = _stp_fallocate_mode_str(mode)
offset = longlong_arg(3)
len = longlong_arg(4)
@_SYSCALL_FALLOCATE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(mode))
set_uint_arg(2, mode)
if (@probewrite(offset))
set_longlong_arg(3, offset)
if (@probewrite(len))
set_longlong_arg(4, len)
%)
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fallocate = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_fallocate"))
@_SYSCALL_FALLOCATE_NAME
fd = int_arg(1)
mode = uint_arg(2)
mode_str = _stp_fallocate_mode_str(mode)
%( CONFIG_64BIT == "y" %?
offset = longlong_arg(3)
len = longlong_arg(4)
%:
# On a 32-bit kernel, 'long long' arguments take the space of
# 2 arguments, so we have to adjust the following argument
# numbers.
offset = longlong_arg(3)
len = longlong_arg(5)
%)
@_SYSCALL_FALLOCATE_ARGSTR
},
{
%( @_IS_SREG_KERNEL %?
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(mode))
set_uint_arg(2, mode)
if (@probewrite(offset))
set_longlong_arg(3, offset)
%( CONFIG_64BIT == "y" %?
if (@probewrite(len))
set_longlong_arg(4, len)
%:
if (@probewrite(len))
set_longlong_arg(5, len)
%)
%)
}
probe nd_syscall.fallocate.return = nd1_syscall.fallocate.return!, nd2_syscall.fallocate.return!, tp_syscall.fallocate.return
{ }
probe nd1_syscall.fallocate.return = kprobe.function("sys_fallocate").return ?
{
asmlinkage()
@__syscall_gate_compat_simple
@_SYSCALL_FALLOCATE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fallocate.return = kprobe.function(@arch_syscall_prefix "sys_fallocate").return ?
{
@_SYSCALL_FALLOCATE_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fallocate.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_gate(@const("__NR_fallocate"))
@_SYSCALL_FALLOCATE_NAME
@SYSC_RETVALSTR($ret)
}
|
