restructure results

1 files changed, 0 insertions, 97 deletions

diff --git a/results/classifier/108/debug/2553 b/results/classifier/108/debug/2553
deleted file mode 100644
index 119ae6fe..00000000
--- a/results/classifier/108/debug/2553
+++ /dev/null
@@ -1,97 +0,0 @@
-debug: 0.967
-performance: 0.960
-network: 0.957
-device: 0.949
-graphic: 0.945
-PID: 0.945
-socket: 0.933
-other: 0.931
-boot: 0.930
-files: 0.923
-permissions: 0.916
-semantic: 0.912
-KVM: 0.869
-vnc: 0.863
-
-Joining IP multicast fails when emulating 64-bit Linux
-Description of problem:
-I have some code that joins IP multicast groups and I'd like to use QEMU to test it on big-endian and/or 32-bit platforms. But when I compile it for 64-bit big-endian platforms (e.g. PowerPC64) and run it under QEMU user-mode emulation, the setsockopt(IP_ADD_MEMBERSHIP) call fails with ENODEV.
-
-This appears to refer to the imr_ifindex ("interface index") field in struct ip_mreqn not being valid, which in turn appears to be because it's not being correctly marshalled from the binary under emulation, to the host's *actual* setsockopt system call.
-
-I *think* this may be because linux-user/syscall_defs.h (https://github.com/qemu/qemu/blob/master/linux-user/syscall_defs.h) contains the following at line 210:
- 
-```
-struct target_ip_mreqn {
-    struct target_in_addr imr_multiaddr;
-    struct target_in_addr imr_address;
-    abi_long imr_ifindex;
-};
-```
-
-but the actual Linux ip_mreqn has imr_ifindex as an int (32-bit everywhere) not a long (64-bit on PPC64); the size of this structure is 12 on all Linux platforms.
-
-I opted to submit an issue instead of just patching it, in case there was some wider context I hadn't seen?
-Steps to reproduce:
-1. take the following C program (distilled from a larger program):
-
-```
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-int main(int argc, char *argv[])
-{
-    int fd = socket(AF_INET, SOCK_DGRAM, 0);
-    if (fd < 0) {
-        perror("socket");
-        return 1;
-    }
-
-    struct ip_mreqn mreq;
-    mreq.imr_multiaddr.s_addr = inet_addr("239.255.255.250");
-    mreq.imr_address.s_addr = htonl(INADDR_ANY);
-    mreq.imr_ifindex = 1;
-    int size = sizeof(mreq);
-    printf("size=%u\n", size);
-    if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
-                   (char*) &mreq, sizeof(mreq)) < 0) {
-        perror("setsockopt");
-        return 1;
-    }
-    printf("OK\n");
-    return 0;
-}
-```
-
-2. confirm it works compiled native on amd64/x86_64:
-
-```
-[peter@amd64 misc]$ gcc mcast.c -o mcast
-[peter@amd64 misc]$ ./mcast
-size=12
-OK
-```
-
-3. watch it *not* work emulated:
-
-```
-[peter@amd64 misc]$ powerpc64-linux-gnu-gcc mcast.c -o mcast.ppc64
-[peter@amd64 misc]$ QEMU_LD_PREFIX=/usr/powerpc64-linux-gnu qemu-ppc64 ./mcast.ppc64 
-size=12
-setsockopt: No such device
-```
-Additional information:
-If the target_ip_mreqn issue is real, the following code in syscall.c helped conceal it:
-
-            if (optlen < sizeof (struct target_ip_mreq) ||
-                optlen > sizeof (struct target_ip_mreqn)) {
-                return -TARGET_EINVAL;
-            }
-
-Should this instead be testing for size equal to target_ip_mreq or equal to target_ip_mreqn, not anywhere in between? in this case target_ip_mreq is 8 bytes, target_ip_mreqn is 16 bytes, but optlen is 12. The end result is that QEMU passes 4 bytes of uninitialised stack memory as imr_ifindex!
-
-The actual kernel behaviour appears to be: smaller than ip_mreq, EINVAL; between ip_mreq and ip_mreqn, silently treat as ip_mreq; larger or equal to ip_mreqn, silently treat as ip_mreqn. see https://github.com/torvalds/linux/blob/b31c4492884252a8360f312a0ac2049349ddf603/net/ipv4/ip_sockglue.c#L1234