On Fri, Nov 29, 2019 at 2:57 PM Jeffrey Walton <noloader@xxxxxxxxx> wrote: > > On Fri, Nov 29, 2019 at 2:48 PM Valentin Vidić > <vvidic@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > On Fri, Nov 29, 2019 at 02:36:10PM -0500, Jeffrey Walton wrote: > > > I'm trying to run through the example at > > > https://www.kernel.org/doc/html/latest/networking/tls.html#kernel-tls > > > . > > > > > > I'm working on Fedora 31 x86_64 (fully patched). Running my program results in: > > > > > > $ ./ktls > > > setsockopt failed, 2, No such file or directory > > > > > > I observed: > > > > > > $ cat /proc/sys/net/ipv4/tcp_available_ulp > > > $ > > > > > > Is there a way to enable ULP at boot? Or is this a kernel config > > > option? Or maybe I am doing something else wrong? > > > > strace gives me: > > > > ... > > socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 3 > > setsockopt(3, SOL_TCP, TCP_ULP, [7564404], 4) = -1 ENOENT (No such file or directory) > > fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0x2), ...}) = 0 > > brk(NULL) = 0x55d76b14e000 > > brk(0x55d76b16f000) = 0x55d76b16f000 > > write(1, "setsockopt failed, 2, No such fi"..., 48setsockopt failed, 2, No such file or directory > > ) = 48 > > exit_group(1) = ? > > +++ exited with 1 +++ > > > > $ grep TLS /boot/config-4.19.0-6-amd64 > > CONFIG_HAVE_COPY_THREAD_TLS=y > > # CONFIG_TLS is not set > > # CONFIG_VIDEO_IVTV_DEPRECATED_IOCTLS is not set > > > > So you probably need to rebuild the kernel with CONFIG_TLS to get this working. > > Thanks Valentin. > > Here's what I am seeing: > > $ grep TLS /boot/config-5.3.12-300.fc31.x86_64 > CONFIG_HAVE_COPY_THREAD_TLS=y > CONFIG_TLS=m > ... > > I believe the 'm' means a loadable module. But: > > $ insmod tls > insmod: ERROR: could not load module tls: No such file or directory My bad, I needed modprobe, not insmod. So now I am at: $ gcc -Wall -g2 -O1 ktls.c -o ktls $ ./ktls setsockopt failed, 524, Unknown error 524 Jeff _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
