# fallocate __________________________________________________ # # asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, # u32 lenhi, u32 lenlo) @define _SYSCALL_COMPAT_FALLOCATE_NAME %( name = "fallocate" %) @define _SYSCALL_COMPAT_FALLOCATE_ARGSTR %( argstr = sprintf("%d, %s, %#x, %u", fd, mode_str, offset, len) %) @define _SYSCALL_COMPAT_FALLOCATE_REGARGS %( fd = int_arg(1) mode = int_arg(2) mode_str = _stp_fallocate_mode_str(mode) offset = ((uint_arg(3) << 32) | uint_arg(4)) len = ((uint_arg(5) << 32) | uint_arg(6)) %) probe syscall.compat_fallocate = dw_syscall.compat_fallocate !, nd_syscall.compat_fallocate ? {} probe syscall.compat_fallocate.return = dw_syscall.compat_fallocate.return !, nd_syscall.compat_fallocate.return ? {} # dw_compat_fallocate _____________________________________________________ probe dw_syscall.compat_fallocate = kernel.function("compat_sys_fallocate") ? { @_SYSCALL_COMPAT_FALLOCATE_NAME fd = __int32($fd) mode = __int32($mode) mode_str = _stp_fallocate_mode_str(mode) offset = (($offhi << 32) | $offlo) len = (($lenhi << 32) | $lenlo) @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } probe dw_syscall.compat_fallocate.return = kernel.function("compat_sys_fallocate").return ? { @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR($return) } # nd_compat_fallocate _____________________________________________________ probe nd_syscall.compat_fallocate = nd1_syscall.compat_fallocate!, tp_syscall.compat_fallocate { } probe nd1_syscall.compat_fallocate = kprobe.function("compat_sys_fallocate") ? { asmlinkage() @_SYSCALL_COMPAT_FALLOCATE_NAME @_SYSCALL_COMPAT_FALLOCATE_REGARGS @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.compat_fallocate = kernel.trace("sys_enter") { __set_syscall_pt_regs($regs) @__compat_syscall_gate(@const("__NR_fallocate")) @_SYSCALL_COMPAT_FALLOCATE_NAME @_SYSCALL_COMPAT_FALLOCATE_REGARGS @_SYSCALL_COMPAT_FALLOCATE_ARGSTR } probe nd_syscall.compat_fallocate.return = nd1_syscall.compat_fallocate.return!, tp_syscall.compat_fallocate.return { } probe nd1_syscall.compat_fallocate.return = kprobe.function("compat_sys_fallocate").return ? { @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR(returnval()) } /* kernel 3.5+, but undesirable because it affects all syscalls */ probe tp_syscall.compat_fallocate.return = kernel.trace("sys_exit") { __set_syscall_pt_regs($regs) @__compat_syscall_gate(@const("__NR_fallocate")) @_SYSCALL_COMPAT_FALLOCATE_NAME @SYSC_RETVALSTR($ret) }