/usr/share/gocode/src/github.com/hanwen/go-fuse/fuse/test/xfs_test.go is in golang-github-hanwen-go-fuse-dev 0.0~git20171124.0.14c3015-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | // Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
package test
import (
"fmt"
"os"
"path/filepath"
"syscall"
"testing"
"unsafe"
)
func clen(n []byte) int {
for i := 0; i < len(n); i++ {
if n[i] == 0 {
return i
}
}
return len(n)
}
type CDirent struct {
ino uint64
ntype uint8
off int64
name string
}
func parseDirents(buf []byte) []CDirent {
var result []CDirent
for len(buf) > 0 {
de := *(*syscall.Dirent)(unsafe.Pointer(&buf[0]))
buf = buf[de.Reclen:]
bytes := (*[10000]byte)(unsafe.Pointer(&de.Name[0]))
var name = string(bytes[0:clen(bytes[:])])
result = append(result, CDirent{
ino: de.Ino,
ntype: de.Type,
off: de.Off,
name: name,
})
}
return result
}
// This test is inspired on xfstest, t_dir_offset2.c
func TestReaddirPlusSeek(t *testing.T) {
tc := NewTestCase(t)
defer tc.Cleanup()
var names []string
for i := 0; i < 20; i++ {
names = append(names, fmt.Sprintf("abcd%d", i))
}
for _, n := range names {
if err := os.MkdirAll(filepath.Join(tc.origSubdir, n), 0755); err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
}
fd, err := syscall.Open(tc.mountSubdir, syscall.O_RDONLY, 0755)
if err != nil {
t.Fatalf("Open(%q): %v", tc.mountSubdir, err)
}
defer syscall.Close(int(fd))
// store offsets
type entryOff struct {
ino uint64
off int64
}
previous := map[int]entryOff{}
var bufdata [1024]byte
for {
buf := bufdata[:]
n, err := syscall.ReadDirent(fd, buf)
if err != nil {
t.Fatalf("ReadDirent: %v", err)
}
if n == 0 {
break
}
buf = buf[:n]
for _, d := range parseDirents(buf) {
if d.name == "." || d.name == ".." {
continue
}
i := len(previous)
previous[i] = entryOff{d.ino, d.off}
}
}
for i := len(previous) - 1; i >= 0; i-- {
var off int64
if i > 0 {
off = previous[i-1].off
}
if _, err := syscall.Seek(fd, off, 0); err != nil {
t.Fatalf("Seek %v", err)
}
buf := bufdata[:]
n, err := syscall.ReadDirent(fd, buf)
if err != nil {
t.Fatalf("readdir after seek %d: %v", i, err)
}
if n == 0 {
t.Fatalf("no dirent after seek to %d", i)
}
ds := parseDirents(buf[:n])
if ds[0].ino != previous[i].ino {
t.Errorf("got ino %d, want %d", ds[0].ino, previous[i].ino)
}
}
// Delete has a forget as side-effect: make sure we get the lookup counts correct.
for _, n := range names {
full := filepath.Join(tc.mountSubdir, n)
if err := syscall.Rmdir(full); err != nil {
t.Fatalf("Rmdir(%q): %v", n, err)
}
}
}
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