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# fstatfs ____________________________________________________
# long sys_fstatfs(unsigned int fd, struct statfs __user * buf)
# long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
#
@define _SYSCALL_FSTATFS_NAME
%(
name = "fstatfs"
%)
@define _SYSCALL_FSTATFS_ARGSTR
%(
argstr = sprintf("%d, %p", fd, buf_uaddr)
%)
@define _SYSCALL_FSTATFS_REGARGS
%(
fd = int_arg(1)
buf_uaddr = pointer_arg(2)
%)
@define _SYSCALL_FSTATFS_REGARGS_STORE
%(
if (@probewrite(fd))
set_int_arg(1, fd)
if (@probewrite(buf_uaddr))
set_pointer_arg(2, buf_uaddr)
%)
probe syscall.fstatfs = dw_syscall.fstatfs !, nd_syscall.fstatfs ? {}
probe syscall.fstatfs.return = dw_syscall.fstatfs.return !, nd_syscall.fstatfs.return ? {}
# dw_fstatfs _____________________________________________________
probe dw_syscall.fstatfs = kernel.function("compat_sys_fstatfs").call ?,
kernel.function("sys_fstatfs").call
{
@_SYSCALL_FSTATFS_NAME
fd = __int32($fd)
buf_uaddr = $buf
@_SYSCALL_FSTATFS_ARGSTR
}
probe dw_syscall.fstatfs.return = kernel.function("compat_sys_fstatfs").return ?,
kernel.function("sys_fstatfs").return
{
@_SYSCALL_FSTATFS_NAME
@SYSC_RETVALSTR($return)
}
# nd_fstatfs _____________________________________________________
probe nd_syscall.fstatfs = nd1_syscall.fstatfs!, nd2_syscall.fstatfs!, tp_syscall.fstatfs
{ }
probe nd1_syscall.fstatfs = kprobe.function("compat_sys_fstatfs") ?,
kprobe.function("sys_fstatfs") ?
{
@_SYSCALL_FSTATFS_NAME
asmlinkage()
@_SYSCALL_FSTATFS_REGARGS
@_SYSCALL_FSTATFS_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.fstatfs = kprobe.function(@arch_syscall_prefix "compat_sys_fstatfs") ?,
kprobe.function(@arch_syscall_prefix "sys_fstatfs") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_FSTATFS_NAME
@_SYSCALL_FSTATFS_REGARGS
@_SYSCALL_FSTATFS_ARGSTR
},
{
@_SYSCALL_FSTATFS_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fstatfs = kernel.trace("sys_enter")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fstatfs"), @const("__NR_compat_fstatfs"))
@_SYSCALL_FSTATFS_NAME
@_SYSCALL_FSTATFS_REGARGS
@_SYSCALL_FSTATFS_ARGSTR
},
{
@_SYSCALL_FSTATFS_REGARGS_STORE
}
probe nd_syscall.fstatfs.return = nd1_syscall.fstatfs.return!, nd2_syscall.fstatfs.return!, tp_syscall.fstatfs.return
{ }
probe nd1_syscall.fstatfs.return = kprobe.function("compat_sys_fstatfs").return ?,
kprobe.function("sys_fstatfs").return ?
{
@_SYSCALL_FSTATFS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.fstatfs.return = kprobe.function(@arch_syscall_prefix "compat_sys_fstatfs").return ?,
kprobe.function(@arch_syscall_prefix "sys_fstatfs").return ?
{
@_SYSCALL_FSTATFS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.fstatfs.return = kernel.trace("sys_exit")
{
__set_syscall_pt_regs($regs)
@__syscall_compat_gate(@const("__NR_fstatfs"), @const("__NR_compat_fstatfs"))
@_SYSCALL_FSTATFS_NAME
@SYSC_RETVALSTR($ret)
}
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