'struct __kernel_timespec' does not contain a field named 'tv_nsec' - but it does!

[ttsiodras]

My /usr/include/linux/time_types.h says that struct __kernel_timespec...

struct __kernel_timespec {
    __kernel_time64_t       tv_sec;                 /* seconds */
    long long               tv_nsec;                /* nanoseconds */
};

...has a tv_nsec - but bpftrace says...

# bpftrace -e 'tracepoint:syscalls:sys_enter_clock_nanosleep { printf("%s is sleeping for %d!\n", comm, args->rqtp->tv_nsec);}' -c ./a.out 
stdin:1:90-109: ERROR: Struct/union of type 'struct __kernel_timespec' does not contain a field named 'tv_nsec'
tracepoint:syscalls:sys_enter_clock_nanosleep { printf("%s is sleeping for %d!\n", comm, args->rqtp->tv_nsec);}
                                                                                         ~~~~~~~~~~~~~~~~~~~

Perhaps this is also related - I can't "see" the contents of the struct:

# bpftrace -lv 'struct __kernel_timespec'
# 

System specs:

• Arch Linux
• kernel 5.15.35-1-lts
• bpftrace 0.14.1-1

[viktormalik]

It seems that your kernel doesn't have BTF, which is why you can't see the struct fields. The solution is to use a kernel with BTF or to include the proper header with your script:

# bpftrace --include 'linux/time_types.h' -e 'tracepoint...

[ttsiodras]

Using bpftrace --include 'linux/time_types.h' -e 'tracepoint... indeed solved the problem. Thank you!