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|
use aya_ebpf::{
cty::{c_char, c_uint},
helpers::{bpf_probe_read_kernel_str_bytes, bpf_probe_read_user_str_bytes},
};
use core::ffi::c_size_t;
use fs_tracer_common::CloseSyscallBPF;
use crate::*;
pub fn handle_sys_close(
ctx: TracePointContext,
syscall_type: SyscallType,
) -> Result<c_long, c_long> {
match syscall_type {
SyscallType::Enter => unsafe { handle_sys_close_enter(ctx) },
SyscallType::Exit => unsafe { handle_sys_close_exit(ctx) },
}
}
unsafe fn handle_sys_close_enter(ctx: TracePointContext) -> Result<c_long, c_long> {
// info!(&ctx, "handle_sys_close start");
#[repr(C)]
#[derive(Clone, Copy)]
struct CloseSyscallArgs {
fd: c_int,
}
let args = ctx.read_at::<CloseSyscallArgs>(16)?;
let tgid: u32 = ctx.tgid();
let _ = SYSCALL_ENTERS.insert(
&tgid,
&SyscallInfo::Close(CloseSyscallBPF {
pid: ctx.pid(),
fd: args.fd,
ret: -9999,
}),
0,
);
Ok(0)
}
unsafe fn handle_sys_close_exit(ctx: TracePointContext) -> Result<c_long, c_long> {
// info!(&ctx, "handle_sys_close_exit start");
let ret = ctx.read_at::<c_long>(16)?; //TODO: We cant use unwrap, thats why we couldnt use the aya helper fns
let tgid = ctx.tgid();
if let Some(syscall) = SYSCALL_ENTERS.get(&tgid)
&& let SyscallInfo::Close(mut syscall_close) = syscall
{
syscall_close.ret = ret;
EVENTS.output(&ctx, &SyscallInfo::Close(syscall_close), 0);
let _ = SYSCALL_ENTERS.remove(&tgid);
return Ok(0);
}
Err(0)
}
|
