internal/testsuite: move from test

This structure is a lot less clumsy than the old nix-centric layout.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 0 insertions, 122 deletions

diff --git a/test/sharefs/raceattr.go b/test/sharefs/raceattr.go
deleted file mode 100644
index 412cb2b3..00000000
--- a/test/sharefs/raceattr.go
+++ /dev/null
@@ -1,122 +0,0 @@
-//go:build raceattr
-
-// The raceattr program reproduces vfs inode file attribute race.
-//
-// Even though libfuse high-level API presents the address of a struct stat
-// alongside struct fuse_context, file attributes are actually inherent to the
-// inode, instead of the specific call from userspace. The kernel implementation
-// in fs/fuse/xattr.c appears to make stale data in the inode (set by a previous
-// call) impossible or very unlikely to reach userspace via the stat family of
-// syscalls. However, when using default_permissions to have the VFS check
-// permissions, this race still happens, despite the resulting struct stat being
-// correct when overriding the check via capabilities otherwise.
-//
-// This program reproduces the failure, but because of its continuous nature, it
-// is provided independent of the vm integration test suite.
-package main
-
-import (
-	"context"
-	"flag"
-	"log"
-	"os"
-	"os/signal"
-	"runtime"
-	"sync"
-	"sync/atomic"
-	"syscall"
-)
-
-func newStatAs(
-	ctx context.Context, cancel context.CancelFunc,
-	n *atomic.Uint64, ok *atomic.Bool,
-	uid uint32, pathname string,
-	continuous bool,
-) func() {
-	return func() {
-		runtime.LockOSThread()
-		defer cancel()
-
-		if _, _, errno := syscall.Syscall(
-			syscall.SYS_SETUID, uintptr(uid),
-			0, 0,
-		); errno != 0 {
-			cancel()
-			log.Printf("cannot set uid to %d: %s", uid, errno)
-		}
-
-		var stat syscall.Stat_t
-		for {
-			if ctx.Err() != nil {
-				return
-			}
-
-			if err := syscall.Lstat(pathname, &stat); err != nil {
-				// SHAREFS_PERM_DIR not world executable, or
-				// SHAREFS_PERM_REG not world readable
-				if !continuous {
-					cancel()
-				}
-				ok.Store(true)
-				log.Printf("uid %d: %v", uid, err)
-			} else if stat.Uid != uid {
-				// appears to be unreachable
-				if !continuous {
-					cancel()
-				}
-				ok.Store(true)
-				log.Printf("got uid %d instead of %d", stat.Uid, uid)
-			}
-			n.Add(1)
-		}
-	}
-}
-
-func main() {
-	log.SetFlags(0)
-	log.SetPrefix("raceattr: ")
-
-	p := flag.String("target", "/sdcard/raceattr", "pathname of test file")
-	u0 := flag.Int("uid0", 1<<10-1, "first uid")
-	u1 := flag.Int("uid1", 1<<10-2, "second uid")
-	count := flag.Int("count", 1, "threads per uid")
-	continuous := flag.Bool("continuous", false, "keep running even after reproduce")
-	flag.Parse()
-
-	if os.Geteuid() != 0 {
-		log.Fatal("this program must run as root")
-	}
-
-	ctx, cancel := signal.NotifyContext(
-		context.Background(),
-		syscall.SIGINT,
-		syscall.SIGTERM,
-		syscall.SIGHUP,
-	)
-
-	if err := os.WriteFile(*p, nil, 0); err != nil {
-		log.Fatal(err)
-	}
-
-	var (
-		wg sync.WaitGroup
-
-		n  atomic.Uint64
-		ok atomic.Bool
-	)
-
-	if *count < 1 {
-		*count = 1
-	}
-	for range *count {
-		wg.Go(newStatAs(ctx, cancel, &n, &ok, uint32(*u0), *p, *continuous))
-		if *u1 >= 0 {
-			wg.Go(newStatAs(ctx, cancel, &n, &ok, uint32(*u1), *p, *continuous))
-		}
-	}
-
-	wg.Wait()
-	if !*continuous && ok.Load() {
-		log.Printf("reproduced after %d calls", n.Load())
-	}
-}