virtiofs: enable test case for mapping virtiofs MAP_PRIVATE (#13964)

benhillis · Ben Hillis · web-flow · commit f459aef63d20 · 2025-12-23T09:26:20.000-08:00
Co-authored-by: Ben Hillis &lt;benhill@ntdev.microsoft.com&gt;
diff --git a/test/linux/unit_tests/drvfs.c b/test/linux/unit_tests/drvfs.c
@@ -3475,14 +3475,18 @@ Return Value:
     // is what execve uses.
     //
 
+    LxtCheckMapErrno(Mapping = mmap(NULL, 2, PROT_READ, MAP_PRIVATE, Fd, 0));
+    LxtCheckMemoryEqual(Mapping, "MZ", 2);
+    LxtCheckResult(munmap(Mapping, 2));
+
     if (g_LxtFsInfo.FsType != LxtFsTypeVirtioFs)
     {
         LxtCheckMapErrno(Mapping = mmap(NULL, 2, PROT_READ, MAP_SHARED, Fd, 0));
         LxtCheckMemoryEqual(Mapping, "MZ", 2);
     }
     else
     {
-        LxtLogInfo("TODO: debug virtiofs handling of app exec links");
+        LxtLogInfo("TODO: virtiofs does not support MAP_SHARED");
     }
 
 ErrorExit:

Original file line number	Diff line number	Diff line change
`@@ -3475,14 +3475,18 @@ Return Value:`
`3475`	`3475`	`// is what execve uses.`
`3476`	`3476`	`//`
`3477`	`3477`
	`3478`	`+ LxtCheckMapErrno(Mapping = mmap(NULL, 2, PROT_READ, MAP_PRIVATE, Fd, 0));`
	`3479`	`+ LxtCheckMemoryEqual(Mapping, "MZ", 2);`
	`3480`	`+ LxtCheckResult(munmap(Mapping, 2));`
	`3481`	`+`
`3478`	`3482`	`if (g_LxtFsInfo.FsType != LxtFsTypeVirtioFs)`
`3479`	`3483`	`{`
`3480`	`3484`	`LxtCheckMapErrno(Mapping = mmap(NULL, 2, PROT_READ, MAP_SHARED, Fd, 0));`
`3481`	`3485`	`LxtCheckMemoryEqual(Mapping, "MZ", 2);`
`3482`	`3486`	`}`
`3483`	`3487`	`else`
`3484`	`3488`	`{`
`3485`		`- LxtLogInfo("TODO: debug virtiofs handling of app exec links");`
	`3489`	`+ LxtLogInfo("TODO: virtiofs does not support MAP_SHARED");`
`3486`	`3490`	`}`
`3487`	`3491`
`3488`	`3492`	`ErrorExit:`