* Exporting ioctls from out-of-tree module to userspace @ 2014-07-16 18:57 Daniel Hilst Selli 2014-07-17 7:06 ` Anupam Kapoor 0 siblings, 1 reply; 3+ messages in thread From: Daniel Hilst Selli @ 2014-07-16 18:57 UTC (permalink / raw) To: kernelnewbies I write an out-of-tree module and now want to export its ioctls to userspace by installing a header that my modules includes, I was looking for how to do it but can't get it.. I was trying header-y from https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt but got: make[1]: *** No rule to make target 'headers_install'. Stop. Here is what I'm trying: https://gist.github.com/gkos/b0bc4e29a3147b0e6d3b I see on kernel that usually the exported headers go in include/uapi/SOMETHING and are declared on include/uapi/Kbuild.. but have no idea if this may work for out-of-tree modules, the headers_install exists on linux Makefile so the 'No rule to make target 'headers_install'' doesn't make sense to me .. I try follow headers_install target on kernel's Makefile but only got frustraded :( Any idea? ps: I compiled the module but don't loaded it, so it may have mistakes Thanks in advance! Cheers! ^ permalink raw reply [flat|nested] 3+ messages in thread
* Exporting ioctls from out-of-tree module to userspace 2014-07-16 18:57 Exporting ioctls from out-of-tree module to userspace Daniel Hilst Selli @ 2014-07-17 7:06 ` Anupam Kapoor 2014-07-17 17:18 ` Daniel Hilst Selli 0 siblings, 1 reply; 3+ messages in thread From: Anupam Kapoor @ 2014-07-17 7:06 UTC (permalink / raw) To: kernelnewbies hi, in the older kernels (anything before the commit id mentioned below), there is include/Kbuild, where you can do something like this: header-y += ../../quick-hacks/kernel-modules/mymodule/ and then do a 'make headers_install' from the *source* tree, which seems to do the right thing. in newer kernels, due to 10b63956fce7f369cc37fd4d994f09bd5203efe4, you need to do the same thing in include/uapi/Kbuild... kind regards anupam On Thu, Jul 17, 2014 at 12:27 AM, Daniel Hilst Selli <danielhilst@gmail.com> wrote: > I write an out-of-tree module and now want to export its ioctls to > userspace by installing a header that my modules includes, I was looking > for how to do it but can't get it.. > > I was trying header-y from > https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt but got: > make[1]: *** No rule to make target 'headers_install'. Stop. > > Here is what I'm trying: https://gist.github.com/gkos/b0bc4e29a3147b0e6d3b > > I see on kernel that usually the exported headers go in > include/uapi/SOMETHING and are declared on include/uapi/Kbuild.. but > have no idea if this may work for out-of-tree modules, the > headers_install exists on linux Makefile so the 'No rule to make target > 'headers_install'' doesn't make sense to me .. > > I try follow headers_install target on kernel's Makefile but only got > frustraded :( > > Any idea? > > ps: I compiled the module but don't loaded it, so it may have mistakes > > Thanks in advance! > Cheers! > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- In the beginning was the lambda, and the lambda was with Emacs, and Emacs was the lambda. ^ permalink raw reply [flat|nested] 3+ messages in thread
* Exporting ioctls from out-of-tree module to userspace 2014-07-17 7:06 ` Anupam Kapoor @ 2014-07-17 17:18 ` Daniel Hilst Selli 0 siblings, 0 replies; 3+ messages in thread From: Daniel Hilst Selli @ 2014-07-17 17:18 UTC (permalink / raw) To: kernelnewbies On 07/17/2014 04:06 AM, Anupam Kapoor wrote: > hi, > > in the older kernels (anything before the commit id mentioned below), > there is include/Kbuild, where you can do something like this: > > header-y += ../../quick-hacks/kernel-modules/mymodule/ > > and then do a 'make headers_install' from the *source* tree, which > seems to do the right thing. > > in newer kernels, due to 10b63956fce7f369cc37fd4d994f09bd5203efe4, you > need to do the same thing in include/uapi/Kbuild... > > kind regards > anupam > > > On Thu, Jul 17, 2014 at 12:27 AM, Daniel Hilst Selli > <danielhilst@gmail.com> wrote: >> I write an out-of-tree module and now want to export its ioctls to >> userspace by installing a header that my modules includes, I was looking >> for how to do it but can't get it.. >> >> I was trying header-y from >> https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt but got: >> make[1]: *** No rule to make target 'headers_install'. Stop. >> >> Here is what I'm trying: https://gist.github.com/gkos/b0bc4e29a3147b0e6d3b >> >> I see on kernel that usually the exported headers go in >> include/uapi/SOMETHING and are declared on include/uapi/Kbuild.. but >> have no idea if this may work for out-of-tree modules, the >> headers_install exists on linux Makefile so the 'No rule to make target >> 'headers_install'' doesn't make sense to me .. >> >> I try follow headers_install target on kernel's Makefile but only got >> frustraded :( >> >> Any idea? >> >> ps: I compiled the module but don't loaded it, so it may have mistakes >> >> Thanks in advance! >> Cheers! >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies at kernelnewbies.org >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > Thanks Anupam, I put the line header-y += ../../../module/ on include/uapi/Kbuild But a nasty thing happens... running `make V=1 headers_install' from kernel source gives me this output for my module, which I indented: http://pastebin.com/Ev6WcsjR On second line the nasty thing happens, the scripts/headers_install.sh takes two arguments, OUTDIR and SRCDIR. On this line is possible see that both are the same, so the header is installed on where it comes from, Since I have to patch kernel (include/uapi/Kbuild) to add my uapi header, I can patch kernel to add my module inside tree intead of using out-of-tree modules... Summing up, I'll use sysfs interface which is easier to document and use than ioctl :-) and doesn't need uapi headers... Thanks again Anupam Cheers, ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-07-17 17:18 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-07-16 18:57 Exporting ioctls from out-of-tree module to userspace Daniel Hilst Selli 2014-07-17 7:06 ` Anupam Kapoor 2014-07-17 17:18 ` Daniel Hilst Selli
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