6e7be7d37a
* gnu/packages/patches/strace-kernel-4.16.patch: New file. * gnu/local.mk (dist_patch_DATA): Register it. * gnu/packages/linux.scm (strace)][source](patches): New field.
92 lines
2.7 KiB
Diff
92 lines
2.7 KiB
Diff
Fix test failure when using Linux-Libre >= 4.16.
|
|
|
|
Taken from upstream:
|
|
https://github.com/strace/strace/commit/bcff87c31c0f27c678a43d6b7f67dab363a974fa
|
|
|
|
From bcff87c31c0f27c678a43d6b7f67dab363a974fa Mon Sep 17 00:00:00 2001
|
|
From: Masatake YAMATO <yamato@redhat.com>
|
|
Date: Wed, 2 May 2018 17:11:07 +0900
|
|
Subject: [PATCH] tests/ioctl_kvm_run.c: handle cpuid at the end of vcpu dentry
|
|
|
|
Since Linux 4.16, kernel appends the cpuid as suffix to the entry
|
|
for a kvm vcpu in /proc/$pid/fd like:
|
|
|
|
anon_inode:kvm-vcpu:0
|
|
|
|
That was
|
|
|
|
anon_inode:kvm-vcpu
|
|
|
|
This kernel change causes the test case failure on newer kernels.
|
|
Update the test to deal with the new name as well as the old one.
|
|
|
|
* tests/ioctl_kvm_run.c: Include unistd.h for using readlink(2).
|
|
(vcpu_dev_should_have_cpuid): New function for detecting whether
|
|
a proc entry for given fd has the cpuid suffix or not.
|
|
(main): Trim vcpu_dev to remove the cpuid suffix if needed.
|
|
(vcpu_dev): Remove const modifier.
|
|
---
|
|
tests/ioctl_kvm_run.c | 29 ++++++++++++++++++++++++++++-
|
|
1 file changed, 28 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/tests/ioctl_kvm_run.c b/tests/ioctl_kvm_run.c
|
|
index 179461430..e1bef5796 100644
|
|
--- a/tests/ioctl_kvm_run.c
|
|
+++ b/tests/ioctl_kvm_run.c
|
|
@@ -40,6 +40,7 @@
|
|
# include <string.h>
|
|
# include <sys/ioctl.h>
|
|
# include <sys/mman.h>
|
|
+# include <unistd.h>
|
|
# include <linux/kvm.h>
|
|
|
|
static int
|
|
@@ -56,7 +57,7 @@ kvm_ioctl(int fd, unsigned long cmd, const char *cmd_str, void *arg)
|
|
|
|
static const char dev[] = "/dev/kvm";
|
|
static const char vm_dev[] = "anon_inode:kvm-vm";
|
|
-static const char vcpu_dev[] = "anon_inode:kvm-vcpu";
|
|
+static char vcpu_dev[] = "anon_inode:kvm-vcpu:0";
|
|
static size_t page_size;
|
|
|
|
extern const char code[];
|
|
@@ -165,6 +166,23 @@ run_kvm(const int vcpu_fd, struct kvm_run *const run, const size_t mmap_size,
|
|
}
|
|
}
|
|
|
|
+static int
|
|
+vcpu_dev_should_have_cpuid(int fd)
|
|
+{
|
|
+ int r = 0;
|
|
+ char *filename = NULL;
|
|
+ char buf[sizeof(vcpu_dev)];
|
|
+
|
|
+ if (asprintf(&filename, "/proc/%d/fd/%d", getpid(), fd) < 0)
|
|
+ error_msg_and_fail("asprintf");
|
|
+
|
|
+ if (readlink(filename, buf, sizeof(buf)) == sizeof(buf) - 1
|
|
+ && (memcmp(buf, vcpu_dev, sizeof(buf) - 1) == 0))
|
|
+ r = 1;
|
|
+ free(filename);
|
|
+ return r;
|
|
+}
|
|
+
|
|
int
|
|
main(void)
|
|
{
|
|
@@ -208,6 +226,15 @@ main(void)
|
|
(unsigned long) page_size, (unsigned long) page_size, mem);
|
|
|
|
int vcpu_fd = KVM_IOCTL(vm_fd, KVM_CREATE_VCPU, NULL);
|
|
+ if (!vcpu_dev_should_have_cpuid(vcpu_fd))
|
|
+ /*
|
|
+ * This is an older kernel that doesn't place a cpuid
|
|
+ * at the end of the dentry associated with vcpu_fd.
|
|
+ * Trim the cpuid part of vcpu_dev like:
|
|
+ * "anon_inode:kvm-vcpu:0" -> "anon_inode:kvm-vcpu"
|
|
+ */
|
|
+ vcpu_dev[strlen (vcpu_dev) - 2] = '\0';
|
|
+
|
|
printf("ioctl(%d<%s>, KVM_CREATE_VCPU, 0) = %d<%s>\n",
|
|
vm_fd, vm_dev, vcpu_fd, vcpu_dev);
|
|
|