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# fsync ______________________________________________________
# long sys_fsync(unsigned int fd)
@define _SYSCALL_FSYNC_NAME
%(
name = "fsync"
%)
@define _SYSCALL_FSYNC_ARGSTR
%(
argstr = sprint(fd)
%)
@define _SYSCALL_FSYNC_REGARGS
%(
fd = int_arg(1)
%)
@define _SYSCALL_FSYNC_REGARGS_STORE
%(
if (@probewrite(fd))
set_int_arg(1, fd)
%)
probe syscall.fsync = dw_syscall.fsync !, nd_syscall.fsync ? {}
probe syscall.fsync.return = dw_syscall.fsync.return !, nd_syscall.fsync.return ? {}
# dw_fsync _____________________________________________________
probe dw_syscall.fsync = kernel.function("sys_fsync").call
{
@_SYSCALL_FSYNC_NAME
fd = __int32($fd)
@_SYSCALL_FSYNC_ARGSTR
}
probe dw_syscall.fsync.return = kernel.function("sys_fsync").return
{
@_SYSCALL_FSYNC_NAME
@SYSC_RETVALSTR($return)
}
# nd_fsync _____________________________________________________
probe nd_syscall.fsync = nd1_syscall.fsync!, nd2_syscall.fsync!, tp_syscall.fsync
{ }
probe nd1_syscall.fsync = kprobe.function("sys_fsync") ?
{
@_SYSCALL_FSYNC_NAME
asmlinkage()
@_SYSCALL_FSYNC_REGARGS
@_SYSCALL_FSYNC_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fsync = kprobe.function(@arch_syscall_prefix "sys_fsync") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FSYNC_NAME
@_SYSCALL_FSYNC_REGARGS
@_SYSCALL_FSYNC_ARGSTR
},
{
@_SYSCALL_FSYNC_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fsync = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fsync"), @const("__NR_compat_fsync"))
@_SYSCALL_FSYNC_NAME
@_SYSCALL_FSYNC_REGARGS
@_SYSCALL_FSYNC_ARGSTR
},
{
@_SYSCALL_FSYNC_REGARGS_STORE
}
probe nd_syscall.fsync.return = nd1_syscall.fsync.return!, nd2_syscall.fsync.return!, tp_syscall.fsync.return
{ }
probe nd1_syscall.fsync.return = kprobe.function("sys_fsync").return ?
{
@_SYSCALL_FSYNC_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fsync.return = kprobe.function(@arch_syscall_prefix "sys_fsync").return ?
{
@_SYSCALL_FSYNC_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fsync.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fsync"), @const("__NR_compat_fsync"))
@_SYSCALL_FSYNC_NAME
@SYSC_RETVALSTR($ret)
}
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