[Virtio-fs] virtio-fs on IBM Power ppc64le arch
Stefan Hajnoczi
stefanha at redhat.com
Thu Sep 12 16:09:18 UTC 2019
On Wed, Sep 11, 2019 at 10:18:49PM +0530, Nitesh Konkar wrote:
> Hello Team,
>
> I am trying out virtio-fs on IBM POWER systems by following the steps
> mentioned here: https://virtio-fs.gitlab.io/howto-qemu.html However,
> building qemu and virtiofsd fails on Power.
>
>
>
> root at s:/home/nitesh/virtio-fs/qemu/build# make -j 64
> ...
> ...
> CC qapi/qapi-commands-run-state.o
> CC qapi/qapi-commands-rocker.o
> CC qapi/qapi-commands-sockets.o
> /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c: In function
> ‘usb_xhci_realize’:
> /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:3340:66: error: ‘%d’
> directive output may be truncated writing between 1 and 11 bytes into a
> region of size 5 [-Werror=format-truncation=]
> snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+1);
> ^~
> /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:3340:54: note: directive
> argument in the range [-2147483647, 30]
> snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+1);
> ^~~~~~~~~~~~~~~
> In file included from /usr/include/stdio.h:862:0,
> from /home/nitesh/virtio-fs/qemu/include/qemu/osdep.h:99,
> from /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:21:
> /usr/include/powerpc64le-linux-gnu/bits/stdio2.h:64:10: note:
> ‘__builtin___snprintf_chk’ output between 13 and 23 bytes into a
> destination of size 16
> return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> __bos (__s), __fmt, __va_arg_pack ());
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:3354:66: error: ‘%d’
> directive output may be truncated writing between 1 and 11 bytes into a
> region of size 5 [-Werror=format-truncation=]
> snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+1);
> ^~
> /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:3354:54: note: directive
> argument in the range [-2147483647, 30]
> snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+1);
> ^~~~~~~~~~~~~~~
> In file included from /usr/include/stdio.h:862:0,
> from /home/nitesh/virtio-fs/qemu/include/qemu/osdep.h:99,
> from /home/nitesh/virtio-fs/qemu/hw/usb/hcd-xhci.c:21:
> /usr/include/powerpc64le-linux-gnu/bits/stdio2.h:64:10: note:
> ‘__builtin___snprintf_chk’ output between 13 and 23 bytes into a
> destination of size 16
> return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> __bos (__s), __fmt, __va_arg_pack ());
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You can get around this using:
./configure --disable-werror ...
This is unrelated to virtio-fs, it's an xHCI USB emulation issue.
You could check if qemu.git/master has the same issue and send a patch
upstream to fix it.
> CC qapi/qapi-commands-trace.o
> CC qapi/qapi-commands-tpm.o
> CC qapi/qapi-commands-ui.o
> CC qapi/qapi-commands-transaction.o
> CC qom/cpu.o
> CC replay/replay.o
> CC replay/replay-internal.o
> CC replay/replay-events.o
> CC replay/replay-time.o
> CC replay/replay-input.o
> CC replay/replay-char.o
> CC replay/replay-snapshot.o
> CC replay/replay-audio.o
> CC replay/replay-net.o
> CC ui/console.o
> CC ui/cursor.o
> CC ui/keymaps.o
> CC ui/qemu-pixman.o
> CC ui/input.o
> CC ui/input-keymap.o
> CC ui/input-legacy.o
> CC ui/kbd-state.o
> CC ui/input-linux.o
> CC ui/vnc.o
> CC ui/vnc-enc-zlib.o
> CC ui/vnc-enc-hextile.o
> CC ui/vnc-enc-tight.o
> CC ui/vnc-palette.o
> CC ui/vnc-ws.o
> CC ui/vnc-enc-zrle.o
> CC ui/vnc-auth-vencrypt.o
> CC ui/vnc-jobs.o
> CC audio/ossaudio.o
> CC chardev/char.o
> CC chardev/char-fe.o
> CC chardev/char-fd.o
> CC chardev/char-file.o
> CC chardev/char-io.o
> CC chardev/char-mux.o
> CC chardev/char-null.o
> CC chardev/char-parallel.o
> CC chardev/char-pipe.o
> CC chardev/char-pty.o
> CC chardev/char-socket.o
> CC chardev/char-serial.o
> CC chardev/char-ringbuf.o
> CC chardev/char-stdio.o
> CC chardev/char-udp.o
> CC qga/commands.o
> CC qga/qapi-generated/qga-qapi-types.o
> CC qga/channel-posix.o
> CC qga/qapi-generated/qga-qapi-visit.o
> CC qga/guest-agent-command-state.o
> CC qga/commands-posix.o
> LINK tests/qemu-iotests/socket_scm_helper
> CC qga/qapi-generated/qga-qapi-commands.o
> CC qga/main.o
> CCAS spapr-rtas/spapr-rtas.o
> AR libqemuutil.a
> LINK elf2dmp
> CC qemu-img.o
> Building spapr-rtas/spapr-rtas.img
> Building spapr-rtas/spapr-rtas.bin
> LINK ivshmem-client
> LINK ivshmem-server
> LINK qemu-nbd
> LINK qemu-io
> LINK qemu-edid
> LINK fsdev/virtfs-proxy-helper
> LINK scsi/qemu-pr-helper
> LINK qemu-bridge-helper
> cc1: all warnings being treated as errors
> /home/nitesh/virtio-fs/qemu/rules.mak:69: recipe for target
> 'hw/usb/hcd-xhci.o' failed
> make: *** [hw/usb/hcd-xhci.o] Error 1
> make: *** Waiting for unfinished jobs....
>
>
>
> root at s:/home/nitesh/virtio-fs/qemu/build# make -j 64 virtiofsd
> make[1]: Entering directory '/home/nitesh/virtio-fs/qemu/slirp'
> make[1]: Nothing to be done for 'all'.
> make[1]: Leaving directory '/home/nitesh/virtio-fs/qemu/slirp'
> CC contrib/virtiofsd/buffer.o
> CC contrib/virtiofsd/fuse_opt.o
> CC contrib/virtiofsd/fuse_loop_mt.o
> CC contrib/virtiofsd/fuse_lowlevel.o
> CC contrib/virtiofsd/fuse_signals.o
> CC contrib/virtiofsd/fuse_virtio.o
> CC contrib/virtiofsd/helper.o
> CC contrib/virtiofsd/seccomp.o
> CC contrib/libvhost-user/libvhost-user.o
> CC contrib/virtiofsd/passthrough_ll.o
> CC contrib/libvhost-user/libvhost-user-glib.o
> /home/nitesh/virtio-fs/qemu/contrib/libvhost-user/libvhost-user.c: In
> function ‘vu_set_mem_table_exec_postcopy’:
> /home/nitesh/virtio-fs/qemu/contrib/libvhost-user/libvhost-user.c:677:16:
> error: format ‘%llx’ expects argument of type ‘long long unsigned int’, but
> argument 5 has type ‘__u64 {aka long unsigned int}’ [-Werror=format=]
> DPRINT("%s: region %d: Registered userfault for %llx + %llx\n",
> ^
> __func__, i, reg_struct.range.start, reg_struct.range.len);
> ~~~~~~~~~~~~~~~~~~
> /home/nitesh/virtio-fs/qemu/contrib/libvhost-user/libvhost-user.c:79:29:
> note: in definition of macro ‘DPRINT’
> fprintf(stderr, __VA_ARGS__); \
> ^~~~~~~~~~~
> /home/nitesh/virtio-fs/qemu/contrib/libvhost-user/libvhost-user.c:677:16:
> error: format ‘%llx’ expects argument of type ‘long long unsigned int’, but
> argument 6 has type ‘__u64 {aka long unsigned int}’ [-Werror=format=]
> DPRINT("%s: region %d: Registered userfault for %llx + %llx\n",
> ^
> __func__, i, reg_struct.range.start, reg_struct.range.len);
> ~~~~~~~~~~~~~~~~~~
> /home/nitesh/virtio-fs/qemu/contrib/libvhost-user/libvhost-user.c:79:29:
> note: in definition of macro ‘DPRINT’
> fprintf(stderr, __VA_ARGS__); \
> ^~~~~~~~~~~
> cc1: all warnings being treated as errors
> /home/nitesh/virtio-fs/qemu/rules.mak:69: recipe for target
> 'contrib/libvhost-user/libvhost-user.o' failed
> make: *** [contrib/libvhost-user/libvhost-user.o] Error 1
> make: *** Waiting for unfinished jobs....
>
>
> Do I need to make any arch-specific changes?
Fixing these warnings would be nice, but it's not necessary.
./configure --disable-werror will allow you to continue despite the
compiler warnings.
> PS: Should I share such snippets next time in fedora paste bin?
There is no need to use a pastebin with email since email messages are
allowed to be very long.
Stefan
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