sdk/go/arvados/fs_collection_test.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: Apache-2.0
   4
   5 package arvados
   6
   7 import (
   8         "bytes"
   9         "crypto/md5"
  10         "errors"
  11         "fmt"
  12         "io"
  13         "io/ioutil"
  14         "math/rand"
  15         "net/http"
  16         "os"
  17         "regexp"
  18         "runtime"
  19         "sync"
  20         "testing"
  21         "time"
  22
  23         "git.curoverse.com/arvados.git/sdk/go/arvadostest"
  24         check "gopkg.in/check.v1"
  25 )
  26
  27 var _ = check.Suite(&CollectionFSSuite{})
  28
  29 type keepClientStub struct {
  30         blocks map[string][]byte
  31         sync.RWMutex
  32 }
  33
  34 var errStub404 = errors.New("404 block not found")
  35
  36 func (kcs *keepClientStub) ReadAt(locator string, p []byte, off int) (int, error) {
  37         kcs.RLock()
  38         defer kcs.RUnlock()
  39         buf := kcs.blocks[locator[:32]]
  40         if buf == nil {
  41                 return 0, errStub404
  42         }
  43         return copy(p, buf[off:]), nil
  44 }
  45
  46 func (kcs *keepClientStub) PutB(p []byte) (string, int, error) {
  47         locator := fmt.Sprintf("%x+%d+A12345@abcde", md5.Sum(p), len(p))
  48         buf := make([]byte, len(p))
  49         copy(buf, p)
  50         kcs.Lock()
  51         defer kcs.Unlock()
  52         kcs.blocks[locator[:32]] = buf
  53         return locator, 1, nil
  54 }
  55
  56 type CollectionFSSuite struct {
  57         client *Client
  58         coll   Collection
  59         fs     CollectionFileSystem
  60         kc     keepClient
  61 }
  62
  63 func (s *CollectionFSSuite) SetUpTest(c *check.C) {
  64         s.client = NewClientFromEnv()
  65         err := s.client.RequestAndDecode(&s.coll, "GET", "arvados/v1/collections/"+arvadostest.FooAndBarFilesInDirUUID, nil, nil)
  66         c.Assert(err, check.IsNil)
  67         s.kc = &keepClientStub{
  68                 blocks: map[string][]byte{
  69                         "3858f62230ac3c915f300c664312c63f": []byte("foobar"),
  70                 }}
  71         s.fs, err = s.coll.FileSystem(s.client, s.kc)
  72         c.Assert(err, check.IsNil)
  73 }
  74
  75 func (s *CollectionFSSuite) TestHttpFileSystemInterface(c *check.C) {
  76         _, ok := s.fs.(http.FileSystem)
  77         c.Check(ok, check.Equals, true)
  78 }
  79
  80 func (s *CollectionFSSuite) TestColonInFilename(c *check.C) {
  81         fs, err := (&Collection{
  82                 ManifestText: "./foo:foo 3858f62230ac3c915f300c664312c63f+3 0:3:bar:bar\n",
  83         }).FileSystem(s.client, s.kc)
  84         c.Assert(err, check.IsNil)
  85
  86         f, err := fs.Open("/foo:foo")
  87         c.Assert(err, check.IsNil)
  88
  89         fis, err := f.Readdir(0)
  90         c.Check(err, check.IsNil)
  91         c.Check(len(fis), check.Equals, 1)
  92         c.Check(fis[0].Name(), check.Equals, "bar:bar")
  93 }
  94
  95 func (s *CollectionFSSuite) TestReaddirFull(c *check.C) {
  96         f, err := s.fs.Open("/dir1")
  97         c.Assert(err, check.IsNil)
  98
  99         st, err := f.Stat()
 100         c.Assert(err, check.IsNil)
 101         c.Check(st.Size(), check.Equals, int64(2))
 102         c.Check(st.IsDir(), check.Equals, true)
 103
 104         fis, err := f.Readdir(0)
 105         c.Check(err, check.IsNil)
 106         c.Check(len(fis), check.Equals, 2)
 107         if len(fis) > 0 {
 108                 c.Check(fis[0].Size(), check.Equals, int64(3))
 109         }
 110 }
 111
 112 func (s *CollectionFSSuite) TestReaddirLimited(c *check.C) {
 113         f, err := s.fs.Open("./dir1")
 114         c.Assert(err, check.IsNil)
 115
 116         fis, err := f.Readdir(1)
 117         c.Check(err, check.IsNil)
 118         c.Check(len(fis), check.Equals, 1)
 119         if len(fis) > 0 {
 120                 c.Check(fis[0].Size(), check.Equals, int64(3))
 121         }
 122
 123         fis, err = f.Readdir(1)
 124         c.Check(err, check.IsNil)
 125         c.Check(len(fis), check.Equals, 1)
 126         if len(fis) > 0 {
 127                 c.Check(fis[0].Size(), check.Equals, int64(3))
 128         }
 129
 130         fis, err = f.Readdir(1)
 131         c.Check(len(fis), check.Equals, 0)
 132         c.Check(err, check.NotNil)
 133         c.Check(err, check.Equals, io.EOF)
 134
 135         f, err = s.fs.Open("dir1")
 136         c.Assert(err, check.IsNil)
 137         fis, err = f.Readdir(1)
 138         c.Check(len(fis), check.Equals, 1)
 139         c.Assert(err, check.IsNil)
 140         fis, err = f.Readdir(2)
 141         c.Check(len(fis), check.Equals, 1)
 142         c.Assert(err, check.IsNil)
 143         fis, err = f.Readdir(2)
 144         c.Check(len(fis), check.Equals, 0)
 145         c.Assert(err, check.Equals, io.EOF)
 146 }
 147
 148 func (s *CollectionFSSuite) TestPathMunge(c *check.C) {
 149         for _, path := range []string{".", "/", "./", "///", "/../", "/./.."} {
 150                 f, err := s.fs.Open(path)
 151                 c.Assert(err, check.IsNil)
 152
 153                 st, err := f.Stat()
 154                 c.Assert(err, check.IsNil)
 155                 c.Check(st.Size(), check.Equals, int64(1))
 156                 c.Check(st.IsDir(), check.Equals, true)
 157         }
 158         for _, path := range []string{"/dir1", "dir1", "./dir1", "///dir1//.//", "../dir1/../dir1/"} {
 159                 c.Logf("%q", path)
 160                 f, err := s.fs.Open(path)
 161                 c.Assert(err, check.IsNil)
 162
 163                 st, err := f.Stat()
 164                 c.Assert(err, check.IsNil)
 165                 c.Check(st.Size(), check.Equals, int64(2))
 166                 c.Check(st.IsDir(), check.Equals, true)
 167         }
 168 }
 169
 170 func (s *CollectionFSSuite) TestNotExist(c *check.C) {
 171         for _, path := range []string{"/no", "no", "./no", "n/o", "/n/o"} {
 172                 f, err := s.fs.Open(path)
 173                 c.Assert(f, check.IsNil)
 174                 c.Assert(err, check.NotNil)
 175                 c.Assert(os.IsNotExist(err), check.Equals, true)
 176         }
 177 }
 178
 179 func (s *CollectionFSSuite) TestReadOnlyFile(c *check.C) {
 180         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDONLY, 0)
 181         c.Assert(err, check.IsNil)
 182         st, err := f.Stat()
 183         c.Assert(err, check.IsNil)
 184         c.Check(st.Size(), check.Equals, int64(3))
 185         n, err := f.Write([]byte("bar"))
 186         c.Check(n, check.Equals, 0)
 187         c.Check(err, check.Equals, ErrReadOnlyFile)
 188 }
 189
 190 func (s *CollectionFSSuite) TestCreateFile(c *check.C) {
 191         f, err := s.fs.OpenFile("/new-file 1", os.O_RDWR|os.O_CREATE, 0)
 192         c.Assert(err, check.IsNil)
 193         st, err := f.Stat()
 194         c.Assert(err, check.IsNil)
 195         c.Check(st.Size(), check.Equals, int64(0))
 196
 197         n, err := f.Write([]byte("bar"))
 198         c.Check(n, check.Equals, 3)
 199         c.Check(err, check.IsNil)
 200
 201         c.Check(f.Close(), check.IsNil)
 202
 203         f, err = s.fs.OpenFile("/new-file 1", os.O_RDWR|os.O_CREATE|os.O_EXCL, 0)
 204         c.Check(f, check.IsNil)
 205         c.Assert(err, check.NotNil)
 206
 207         f, err = s.fs.OpenFile("/new-file 1", os.O_RDWR, 0)
 208         c.Assert(err, check.IsNil)
 209         st, err = f.Stat()
 210         c.Assert(err, check.IsNil)
 211         c.Check(st.Size(), check.Equals, int64(3))
 212
 213         c.Check(f.Close(), check.IsNil)
 214
 215         m, err := s.fs.MarshalManifest(".")
 216         c.Assert(err, check.IsNil)
 217         c.Check(m, check.Matches, `. 37b51d194a7513e45b56f6524f2d51f2\+3\+\S+ 0:3:new-file\\0401\n./dir1 .* 3:3:bar 0:3:foo\n`)
 218 }
 219
 220 func (s *CollectionFSSuite) TestReadWriteFile(c *check.C) {
 221         maxBlockSize = 8
 222         defer func() { maxBlockSize = 2 << 26 }()
 223
 224         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 225         c.Assert(err, check.IsNil)
 226         defer f.Close()
 227         st, err := f.Stat()
 228         c.Assert(err, check.IsNil)
 229         c.Check(st.Size(), check.Equals, int64(3))
 230
 231         f2, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 232         c.Assert(err, check.IsNil)
 233         defer f2.Close()
 234
 235         buf := make([]byte, 64)
 236         n, err := f.Read(buf)
 237         c.Check(n, check.Equals, 3)
 238         c.Check(err, check.Equals, io.EOF)
 239         c.Check(string(buf[:3]), check.DeepEquals, "foo")
 240
 241         pos, err := f.Seek(-2, io.SeekCurrent)
 242         c.Check(pos, check.Equals, int64(1))
 243         c.Check(err, check.IsNil)
 244
 245         // Split a storedExtent in two, and insert a memExtent
 246         n, err = f.Write([]byte("*"))
 247         c.Check(n, check.Equals, 1)
 248         c.Check(err, check.IsNil)
 249
 250         pos, err = f.Seek(0, io.SeekCurrent)
 251         c.Check(pos, check.Equals, int64(2))
 252         c.Check(err, check.IsNil)
 253
 254         pos, err = f.Seek(0, io.SeekStart)
 255         c.Check(pos, check.Equals, int64(0))
 256         c.Check(err, check.IsNil)
 257
 258         rbuf, err := ioutil.ReadAll(f)
 259         c.Check(len(rbuf), check.Equals, 3)
 260         c.Check(err, check.IsNil)
 261         c.Check(string(rbuf), check.Equals, "f*o")
 262
 263         // Write multiple blocks in one call
 264         f.Seek(1, io.SeekStart)
 265         n, err = f.Write([]byte("0123456789abcdefg"))
 266         c.Check(n, check.Equals, 17)
 267         c.Check(err, check.IsNil)
 268         pos, err = f.Seek(0, io.SeekCurrent)
 269         c.Check(pos, check.Equals, int64(18))
 270         c.Check(err, check.IsNil)
 271         pos, err = f.Seek(-18, io.SeekCurrent)
 272         c.Check(pos, check.Equals, int64(0))
 273         c.Check(err, check.IsNil)
 274         n, err = io.ReadFull(f, buf)
 275         c.Check(n, check.Equals, 18)
 276         c.Check(err, check.Equals, io.ErrUnexpectedEOF)
 277         c.Check(string(buf[:n]), check.Equals, "f0123456789abcdefg")
 278
 279         buf2, err := ioutil.ReadAll(f2)
 280         c.Check(err, check.IsNil)
 281         c.Check(string(buf2), check.Equals, "f0123456789abcdefg")
 282
 283         // truncate to current size
 284         err = f.Truncate(18)
 285         c.Check(err, check.IsNil)
 286         f2.Seek(0, io.SeekStart)
 287         buf2, err = ioutil.ReadAll(f2)
 288         c.Check(err, check.IsNil)
 289         c.Check(string(buf2), check.Equals, "f0123456789abcdefg")
 290
 291         // shrink to zero some data
 292         f.Truncate(15)
 293         f2.Seek(0, io.SeekStart)
 294         buf2, err = ioutil.ReadAll(f2)
 295         c.Check(err, check.IsNil)
 296         c.Check(string(buf2), check.Equals, "f0123456789abcd")
 297
 298         // grow to partial block/extent
 299         f.Truncate(20)
 300         f2.Seek(0, io.SeekStart)
 301         buf2, err = ioutil.ReadAll(f2)
 302         c.Check(err, check.IsNil)
 303         c.Check(string(buf2), check.Equals, "f0123456789abcd\x00\x00\x00\x00\x00")
 304
 305         f.Truncate(0)
 306         f2.Seek(0, io.SeekStart)
 307         f2.Write([]byte("12345678abcdefghijkl"))
 308
 309         // grow to block/extent boundary
 310         f.Truncate(64)
 311         f2.Seek(0, io.SeekStart)
 312         buf2, err = ioutil.ReadAll(f2)
 313         c.Check(err, check.IsNil)
 314         c.Check(len(buf2), check.Equals, 64)
 315         c.Check(len(f.(*filehandle).inode.(*filenode).segments), check.Equals, 8)
 316
 317         // shrink to block/extent boundary
 318         err = f.Truncate(32)
 319         c.Check(err, check.IsNil)
 320         f2.Seek(0, io.SeekStart)
 321         buf2, err = ioutil.ReadAll(f2)
 322         c.Check(err, check.IsNil)
 323         c.Check(len(buf2), check.Equals, 32)
 324         c.Check(len(f.(*filehandle).inode.(*filenode).segments), check.Equals, 4)
 325
 326         // shrink to partial block/extent
 327         err = f.Truncate(15)
 328         c.Check(err, check.IsNil)
 329         f2.Seek(0, io.SeekStart)
 330         buf2, err = ioutil.ReadAll(f2)
 331         c.Check(err, check.IsNil)
 332         c.Check(string(buf2), check.Equals, "12345678abcdefg")
 333         c.Check(len(f.(*filehandle).inode.(*filenode).segments), check.Equals, 2)
 334
 335         // Force flush to ensure the block "12345678" gets stored, so
 336         // we know what to expect in the final manifest below.
 337         _, err = s.fs.MarshalManifest(".")
 338         c.Check(err, check.IsNil)
 339
 340         // Truncate to size=3 while f2's ptr is at 15
 341         err = f.Truncate(3)
 342         c.Check(err, check.IsNil)
 343         buf2, err = ioutil.ReadAll(f2)
 344         c.Check(err, check.IsNil)
 345         c.Check(string(buf2), check.Equals, "")
 346         f2.Seek(0, io.SeekStart)
 347         buf2, err = ioutil.ReadAll(f2)
 348         c.Check(err, check.IsNil)
 349         c.Check(string(buf2), check.Equals, "123")
 350         c.Check(len(f.(*filehandle).inode.(*filenode).segments), check.Equals, 1)
 351
 352         m, err := s.fs.MarshalManifest(".")
 353         c.Check(err, check.IsNil)
 354         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 355         c.Check(m, check.Equals, "./dir1 3858f62230ac3c915f300c664312c63f+6 25d55ad283aa400af464c76d713c07ad+8 3:3:bar 6:3:foo\n")
 356 }
 357
 358 func (s *CollectionFSSuite) TestSeekSparse(c *check.C) {
 359         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 360         c.Assert(err, check.IsNil)
 361         f, err := fs.OpenFile("test", os.O_CREATE|os.O_RDWR, 0755)
 362         c.Assert(err, check.IsNil)
 363         defer f.Close()
 364
 365         checkSize := func(size int64) {
 366                 fi, err := f.Stat()
 367                 c.Assert(err, check.IsNil)
 368                 c.Check(fi.Size(), check.Equals, size)
 369
 370                 f, err := fs.OpenFile("test", os.O_CREATE|os.O_RDWR, 0755)
 371                 c.Assert(err, check.IsNil)
 372                 defer f.Close()
 373                 fi, err = f.Stat()
 374                 c.Check(err, check.IsNil)
 375                 c.Check(fi.Size(), check.Equals, size)
 376                 pos, err := f.Seek(0, io.SeekEnd)
 377                 c.Check(err, check.IsNil)
 378                 c.Check(pos, check.Equals, size)
 379         }
 380
 381         f.Seek(2, io.SeekEnd)
 382         checkSize(0)
 383         f.Write([]byte{1})
 384         checkSize(3)
 385
 386         f.Seek(2, io.SeekCurrent)
 387         checkSize(3)
 388         f.Write([]byte{})
 389         checkSize(5)
 390
 391         f.Seek(8, io.SeekStart)
 392         checkSize(5)
 393         n, err := f.Read(make([]byte, 1))
 394         c.Check(n, check.Equals, 0)
 395         c.Check(err, check.Equals, io.EOF)
 396         checkSize(5)
 397         f.Write([]byte{1, 2, 3})
 398         checkSize(11)
 399 }
 400
 401 func (s *CollectionFSSuite) TestMarshalSmallBlocks(c *check.C) {
 402         maxBlockSize = 8
 403         defer func() { maxBlockSize = 2 << 26 }()
 404
 405         var err error
 406         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 407         c.Assert(err, check.IsNil)
 408         for _, name := range []string{"foo", "bar", "baz"} {
 409                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 410                 c.Assert(err, check.IsNil)
 411                 f.Write([]byte(name))
 412                 f.Close()
 413         }
 414
 415         m, err := s.fs.MarshalManifest(".")
 416         c.Check(err, check.IsNil)
 417         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 418         c.Check(m, check.Equals, ". c3c23db5285662ef7172373df0003206+6 acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:bar 3:3:baz 6:3:foo\n")
 419 }
 420
 421 func (s *CollectionFSSuite) TestMkdir(c *check.C) {
 422         err := s.fs.Mkdir("foo/bar", 0755)
 423         c.Check(err, check.Equals, os.ErrNotExist)
 424
 425         f, err := s.fs.OpenFile("foo/bar", os.O_CREATE, 0)
 426         c.Check(err, check.Equals, os.ErrNotExist)
 427
 428         err = s.fs.Mkdir("foo", 0755)
 429         c.Check(err, check.IsNil)
 430
 431         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_WRONLY, 0)
 432         c.Check(err, check.IsNil)
 433         if err == nil {
 434                 defer f.Close()
 435                 f.Write([]byte("foo"))
 436         }
 437
 438         // mkdir fails if a file already exists with that name
 439         err = s.fs.Mkdir("foo/bar", 0755)
 440         c.Check(err, check.NotNil)
 441
 442         err = s.fs.Remove("foo/bar")
 443         c.Check(err, check.IsNil)
 444
 445         // mkdir succeeds after the file is deleted
 446         err = s.fs.Mkdir("foo/bar", 0755)
 447         c.Check(err, check.IsNil)
 448
 449         // creating a file in a nonexistent subdir should still fail
 450         f, err = s.fs.OpenFile("foo/bar/baz/foo.txt", os.O_CREATE|os.O_WRONLY, 0)
 451         c.Check(err, check.Equals, os.ErrNotExist)
 452
 453         f, err = s.fs.OpenFile("foo/bar/foo.txt", os.O_CREATE|os.O_WRONLY, 0)
 454         c.Check(err, check.IsNil)
 455         if err == nil {
 456                 defer f.Close()
 457                 f.Write([]byte("foo"))
 458         }
 459
 460         // creating foo/bar as a regular file should fail
 461         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_EXCL, 0)
 462         c.Check(err, check.NotNil)
 463
 464         // creating foo/bar as a directory should fail
 465         f, err = s.fs.OpenFile("foo/bar", os.O_CREATE|os.O_EXCL, os.ModeDir)
 466         c.Check(err, check.NotNil)
 467         err = s.fs.Mkdir("foo/bar", 0755)
 468         c.Check(err, check.NotNil)
 469
 470         m, err := s.fs.MarshalManifest(".")
 471         c.Check(err, check.IsNil)
 472         m = regexp.MustCompile(`\+A[^\+ ]+`).ReplaceAllLiteralString(m, "")
 473         c.Check(m, check.Equals, "./dir1 3858f62230ac3c915f300c664312c63f+6 3:3:bar 0:3:foo\n./foo/bar acbd18db4cc2f85cedef654fccc4a4d8+3 0:3:foo.txt\n")
 474 }
 475
 476 func (s *CollectionFSSuite) TestConcurrentWriters(c *check.C) {
 477         if testing.Short() {
 478                 c.Skip("slow")
 479         }
 480
 481         maxBlockSize = 8
 482         defer func() { maxBlockSize = 2 << 26 }()
 483
 484         var wg sync.WaitGroup
 485         for n := 0; n < 128; n++ {
 486                 wg.Add(1)
 487                 go func() {
 488                         defer wg.Done()
 489                         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 490                         c.Assert(err, check.IsNil)
 491                         defer f.Close()
 492                         for i := 0; i < 6502; i++ {
 493                                 switch rand.Int() & 3 {
 494                                 case 0:
 495                                         f.Truncate(int64(rand.Intn(64)))
 496                                 case 1:
 497                                         f.Seek(int64(rand.Intn(64)), io.SeekStart)
 498                                 case 2:
 499                                         _, err := f.Write([]byte("beep boop"))
 500                                         c.Check(err, check.IsNil)
 501                                 case 3:
 502                                         _, err := ioutil.ReadAll(f)
 503                                         c.Check(err, check.IsNil)
 504                                 }
 505                         }
 506                 }()
 507         }
 508         wg.Wait()
 509
 510         f, err := s.fs.OpenFile("/dir1/foo", os.O_RDWR, 0)
 511         c.Assert(err, check.IsNil)
 512         defer f.Close()
 513         buf, err := ioutil.ReadAll(f)
 514         c.Check(err, check.IsNil)
 515         c.Logf("after lots of random r/w/seek/trunc, buf is %q", buf)
 516 }
 517
 518 func (s *CollectionFSSuite) TestRandomWrites(c *check.C) {
 519         maxBlockSize = 40
 520         defer func() { maxBlockSize = 2 << 26 }()
 521
 522         var err error
 523         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 524         c.Assert(err, check.IsNil)
 525
 526         const nfiles = 256
 527         const ngoroutines = 256
 528
 529         var wg sync.WaitGroup
 530         for n := 0; n < nfiles; n++ {
 531                 wg.Add(1)
 532                 go func(n int) {
 533                         defer wg.Done()
 534                         expect := make([]byte, 0, 64)
 535                         wbytes := []byte("there's no simple explanation for anything important that any of us do")
 536                         f, err := s.fs.OpenFile(fmt.Sprintf("random-%d", n), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0)
 537                         c.Assert(err, check.IsNil)
 538                         defer f.Close()
 539                         for i := 0; i < ngoroutines; i++ {
 540                                 trunc := rand.Intn(65)
 541                                 woff := rand.Intn(trunc + 1)
 542                                 wbytes = wbytes[:rand.Intn(64-woff+1)]
 543                                 for buf, i := expect[:cap(expect)], len(expect); i < trunc; i++ {
 544                                         buf[i] = 0
 545                                 }
 546                                 expect = expect[:trunc]
 547                                 if trunc < woff+len(wbytes) {
 548                                         expect = expect[:woff+len(wbytes)]
 549                                 }
 550                                 copy(expect[woff:], wbytes)
 551                                 f.Truncate(int64(trunc))
 552                                 pos, err := f.Seek(int64(woff), io.SeekStart)
 553                                 c.Check(pos, check.Equals, int64(woff))
 554                                 c.Check(err, check.IsNil)
 555                                 n, err := f.Write(wbytes)
 556                                 c.Check(n, check.Equals, len(wbytes))
 557                                 c.Check(err, check.IsNil)
 558                                 pos, err = f.Seek(0, io.SeekStart)
 559                                 c.Check(pos, check.Equals, int64(0))
 560                                 c.Check(err, check.IsNil)
 561                                 buf, err := ioutil.ReadAll(f)
 562                                 c.Check(string(buf), check.Equals, string(expect))
 563                                 c.Check(err, check.IsNil)
 564                         }
 565                         s.checkMemSize(c, f)
 566                 }(n)
 567         }
 568         wg.Wait()
 569
 570         root, err := s.fs.Open("/")
 571         c.Assert(err, check.IsNil)
 572         defer root.Close()
 573         fi, err := root.Readdir(-1)
 574         c.Check(err, check.IsNil)
 575         c.Check(len(fi), check.Equals, nfiles)
 576
 577         _, err = s.fs.MarshalManifest(".")
 578         c.Check(err, check.IsNil)
 579         // TODO: check manifest content
 580 }
 581
 582 func (s *CollectionFSSuite) TestRemove(c *check.C) {
 583         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 584         c.Assert(err, check.IsNil)
 585         err = fs.Mkdir("dir0", 0755)
 586         c.Assert(err, check.IsNil)
 587         err = fs.Mkdir("dir1", 0755)
 588         c.Assert(err, check.IsNil)
 589         err = fs.Mkdir("dir1/dir2", 0755)
 590         c.Assert(err, check.IsNil)
 591         err = fs.Mkdir("dir1/dir3", 0755)
 592         c.Assert(err, check.IsNil)
 593
 594         err = fs.Remove("dir0")
 595         c.Check(err, check.IsNil)
 596         err = fs.Remove("dir0")
 597         c.Check(err, check.Equals, os.ErrNotExist)
 598
 599         err = fs.Remove("dir1/dir2/.")
 600         c.Check(err, check.Equals, ErrInvalidArgument)
 601         err = fs.Remove("dir1/dir2/..")
 602         c.Check(err, check.Equals, ErrInvalidArgument)
 603         err = fs.Remove("dir1")
 604         c.Check(err, check.Equals, ErrDirectoryNotEmpty)
 605         err = fs.Remove("dir1/dir2/../../../dir1")
 606         c.Check(err, check.Equals, ErrDirectoryNotEmpty)
 607         err = fs.Remove("dir1/dir3/")
 608         c.Check(err, check.IsNil)
 609         err = fs.RemoveAll("dir1")
 610         c.Check(err, check.IsNil)
 611         err = fs.RemoveAll("dir1")
 612         c.Check(err, check.IsNil)
 613 }
 614
 615 func (s *CollectionFSSuite) TestRenameError(c *check.C) {
 616         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 617         c.Assert(err, check.IsNil)
 618         err = fs.Mkdir("first", 0755)
 619         c.Assert(err, check.IsNil)
 620         err = fs.Mkdir("first/second", 0755)
 621         c.Assert(err, check.IsNil)
 622         f, err := fs.OpenFile("first/second/file", os.O_CREATE|os.O_WRONLY, 0755)
 623         c.Assert(err, check.IsNil)
 624         f.Write([]byte{1, 2, 3, 4, 5})
 625         f.Close()
 626         err = fs.Rename("first", "first/second/third")
 627         c.Check(err, check.Equals, ErrInvalidArgument)
 628         err = fs.Rename("first", "first/third")
 629         c.Check(err, check.Equals, ErrInvalidArgument)
 630         err = fs.Rename("first/second", "second")
 631         c.Check(err, check.IsNil)
 632         f, err = fs.OpenFile("second/file", 0, 0)
 633         c.Assert(err, check.IsNil)
 634         data, err := ioutil.ReadAll(f)
 635         c.Check(err, check.IsNil)
 636         c.Check(data, check.DeepEquals, []byte{1, 2, 3, 4, 5})
 637 }
 638
 639 func (s *CollectionFSSuite) TestRename(c *check.C) {
 640         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 641         c.Assert(err, check.IsNil)
 642         const (
 643                 outer = 16
 644                 inner = 16
 645         )
 646         for i := 0; i < outer; i++ {
 647                 err = fs.Mkdir(fmt.Sprintf("dir%d", i), 0755)
 648                 c.Assert(err, check.IsNil)
 649                 for j := 0; j < inner; j++ {
 650                         err = fs.Mkdir(fmt.Sprintf("dir%d/dir%d", i, j), 0755)
 651                         c.Assert(err, check.IsNil)
 652                         for _, fnm := range []string{
 653                                 fmt.Sprintf("dir%d/file%d", i, j),
 654                                 fmt.Sprintf("dir%d/dir%d/file%d", i, j, j),
 655                         } {
 656                                 f, err := fs.OpenFile(fnm, os.O_CREATE|os.O_WRONLY, 0755)
 657                                 c.Assert(err, check.IsNil)
 658                                 _, err = f.Write([]byte("beep"))
 659                                 c.Assert(err, check.IsNil)
 660                                 f.Close()
 661                         }
 662                 }
 663         }
 664         var wg sync.WaitGroup
 665         for i := 0; i < outer; i++ {
 666                 for j := 0; j < inner; j++ {
 667                         wg.Add(1)
 668                         go func(i, j int) {
 669                                 defer wg.Done()
 670                                 oldname := fmt.Sprintf("dir%d/dir%d/file%d", i, j, j)
 671                                 newname := fmt.Sprintf("dir%d/newfile%d", i, inner-j-1)
 672                                 _, err := fs.Open(newname)
 673                                 c.Check(err, check.Equals, os.ErrNotExist)
 674                                 err = fs.Rename(oldname, newname)
 675                                 c.Check(err, check.IsNil)
 676                                 f, err := fs.Open(newname)
 677                                 c.Check(err, check.IsNil)
 678                                 f.Close()
 679                         }(i, j)
 680
 681                         wg.Add(1)
 682                         go func(i, j int) {
 683                                 defer wg.Done()
 684                                 // oldname does not exist
 685                                 err := fs.Rename(
 686                                         fmt.Sprintf("dir%d/dir%d/missing", i, j),
 687                                         fmt.Sprintf("dir%d/dir%d/file%d", outer-i-1, j, j))
 688                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 689
 690                                 // newname parent dir does not exist
 691                                 err = fs.Rename(
 692                                         fmt.Sprintf("dir%d/dir%d", i, j),
 693                                         fmt.Sprintf("dir%d/missing/irrelevant", outer-i-1))
 694                                 c.Check(err, check.ErrorMatches, `.*does not exist`)
 695
 696                                 // oldname parent dir is a file
 697                                 err = fs.Rename(
 698                                         fmt.Sprintf("dir%d/file%d/patherror", i, j),
 699                                         fmt.Sprintf("dir%d/irrelevant", i))
 700                                 c.Check(err, check.ErrorMatches, `.*not a directory`)
 701
 702                                 // newname parent dir is a file
 703                                 err = fs.Rename(
 704                                         fmt.Sprintf("dir%d/dir%d/file%d", i, j, j),
 705                                         fmt.Sprintf("dir%d/file%d/patherror", i, inner-j-1))
 706                                 c.Check(err, check.ErrorMatches, `.*not a directory`)
 707                         }(i, j)
 708                 }
 709         }
 710         wg.Wait()
 711
 712         f, err := fs.OpenFile("dir1/newfile3", 0, 0)
 713         c.Assert(err, check.IsNil)
 714         c.Check(f.Size(), check.Equals, int64(4))
 715         buf, err := ioutil.ReadAll(f)
 716         c.Check(buf, check.DeepEquals, []byte("beep"))
 717         c.Check(err, check.IsNil)
 718         _, err = fs.Open("dir1/dir1/file1")
 719         c.Check(err, check.Equals, os.ErrNotExist)
 720 }
 721
 722 func (s *CollectionFSSuite) TestPersist(c *check.C) {
 723         maxBlockSize = 1024
 724         defer func() { maxBlockSize = 2 << 26 }()
 725
 726         var err error
 727         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 728         c.Assert(err, check.IsNil)
 729         err = s.fs.Mkdir("d:r", 0755)
 730         c.Assert(err, check.IsNil)
 731
 732         expect := map[string][]byte{}
 733
 734         var wg sync.WaitGroup
 735         for _, name := range []string{"random 1", "random:2", "random\\3", "d:r/random4"} {
 736                 buf := make([]byte, 500)
 737                 rand.Read(buf)
 738                 expect[name] = buf
 739
 740                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 741                 c.Assert(err, check.IsNil)
 742                 // Note: we don't close the file until after the test
 743                 // is done. Writes to unclosed files should persist.
 744                 defer f.Close()
 745
 746                 wg.Add(1)
 747                 go func() {
 748                         defer wg.Done()
 749                         for i := 0; i < len(buf); i += 5 {
 750                                 _, err := f.Write(buf[i : i+5])
 751                                 c.Assert(err, check.IsNil)
 752                         }
 753                 }()
 754         }
 755         wg.Wait()
 756
 757         m, err := s.fs.MarshalManifest(".")
 758         c.Check(err, check.IsNil)
 759         c.Logf("%q", m)
 760
 761         root, err := s.fs.Open("/")
 762         c.Assert(err, check.IsNil)
 763         defer root.Close()
 764         fi, err := root.Readdir(-1)
 765         c.Check(err, check.IsNil)
 766         c.Check(len(fi), check.Equals, 4)
 767
 768         persisted, err := (&Collection{ManifestText: m}).FileSystem(s.client, s.kc)
 769         c.Assert(err, check.IsNil)
 770
 771         root, err = persisted.Open("/")
 772         c.Assert(err, check.IsNil)
 773         defer root.Close()
 774         fi, err = root.Readdir(-1)
 775         c.Check(err, check.IsNil)
 776         c.Check(len(fi), check.Equals, 4)
 777
 778         for name, content := range expect {
 779                 c.Logf("read %q", name)
 780                 f, err := persisted.Open(name)
 781                 c.Assert(err, check.IsNil)
 782                 defer f.Close()
 783                 buf, err := ioutil.ReadAll(f)
 784                 c.Check(err, check.IsNil)
 785                 c.Check(buf, check.DeepEquals, content)
 786         }
 787 }
 788
 789 func (s *CollectionFSSuite) TestPersistEmptyFiles(c *check.C) {
 790         var err error
 791         s.fs, err = (&Collection{}).FileSystem(s.client, s.kc)
 792         c.Assert(err, check.IsNil)
 793         for _, name := range []string{"dir", "dir/zerodir", "zero", "zero/zero"} {
 794                 err = s.fs.Mkdir(name, 0755)
 795                 c.Assert(err, check.IsNil)
 796         }
 797
 798         expect := map[string][]byte{
 799                 "0":                nil,
 800                 "00":               {},
 801                 "one":              {1},
 802                 "dir/0":            nil,
 803                 "dir/two":          {1, 2},
 804                 "dir/zero":         nil,
 805                 "dir/zerodir/zero": nil,
 806                 "zero/zero/zero":   nil,
 807         }
 808         for name, data := range expect {
 809                 f, err := s.fs.OpenFile(name, os.O_WRONLY|os.O_CREATE, 0)
 810                 c.Assert(err, check.IsNil)
 811                 if data != nil {
 812                         _, err := f.Write(data)
 813                         c.Assert(err, check.IsNil)
 814                 }
 815                 f.Close()
 816         }
 817
 818         m, err := s.fs.MarshalManifest(".")
 819         c.Check(err, check.IsNil)
 820         c.Logf("%q", m)
 821
 822         persisted, err := (&Collection{ManifestText: m}).FileSystem(s.client, s.kc)
 823         c.Assert(err, check.IsNil)
 824
 825         for name, data := range expect {
 826                 _, err = persisted.Open("bogus-" + name)
 827                 c.Check(err, check.NotNil)
 828
 829                 f, err := persisted.Open(name)
 830                 c.Assert(err, check.IsNil)
 831
 832                 if data == nil {
 833                         data = []byte{}
 834                 }
 835                 buf, err := ioutil.ReadAll(f)
 836                 c.Check(err, check.IsNil)
 837                 c.Check(buf, check.DeepEquals, data)
 838         }
 839 }
 840
 841 func (s *CollectionFSSuite) TestOpenFileFlags(c *check.C) {
 842         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 843         c.Assert(err, check.IsNil)
 844
 845         f, err := fs.OpenFile("missing", os.O_WRONLY, 0)
 846         c.Check(f, check.IsNil)
 847         c.Check(err, check.ErrorMatches, `file does not exist`)
 848
 849         f, err = fs.OpenFile("new", os.O_CREATE|os.O_RDONLY, 0)
 850         c.Assert(err, check.IsNil)
 851         defer f.Close()
 852         n, err := f.Write([]byte{1, 2, 3})
 853         c.Check(n, check.Equals, 0)
 854         c.Check(err, check.ErrorMatches, `read-only file`)
 855         n, err = f.Read(make([]byte, 1))
 856         c.Check(n, check.Equals, 0)
 857         c.Check(err, check.Equals, io.EOF)
 858         f, err = fs.OpenFile("new", os.O_RDWR, 0)
 859         c.Assert(err, check.IsNil)
 860         defer f.Close()
 861         _, err = f.Write([]byte{4, 5, 6})
 862         c.Check(err, check.IsNil)
 863         fi, err := f.Stat()
 864         c.Assert(err, check.IsNil)
 865         c.Check(fi.Size(), check.Equals, int64(3))
 866
 867         f, err = fs.OpenFile("new", os.O_TRUNC|os.O_RDWR, 0)
 868         c.Assert(err, check.IsNil)
 869         defer f.Close()
 870         pos, err := f.Seek(0, io.SeekEnd)
 871         c.Check(pos, check.Equals, int64(0))
 872         c.Check(err, check.IsNil)
 873         fi, err = f.Stat()
 874         c.Assert(err, check.IsNil)
 875         c.Check(fi.Size(), check.Equals, int64(0))
 876         fs.Remove("new")
 877
 878         buf := make([]byte, 64)
 879         f, err = fs.OpenFile("append", os.O_EXCL|os.O_CREATE|os.O_RDWR|os.O_APPEND, 0)
 880         c.Assert(err, check.IsNil)
 881         f.Write([]byte{1, 2, 3})
 882         f.Seek(0, io.SeekStart)
 883         n, _ = f.Read(buf[:1])
 884         c.Check(n, check.Equals, 1)
 885         c.Check(buf[:1], check.DeepEquals, []byte{1})
 886         pos, err = f.Seek(0, io.SeekCurrent)
 887         c.Assert(err, check.IsNil)
 888         c.Check(pos, check.Equals, int64(1))
 889         f.Write([]byte{4, 5, 6})
 890         pos, err = f.Seek(0, io.SeekCurrent)
 891         c.Assert(err, check.IsNil)
 892         c.Check(pos, check.Equals, int64(6))
 893         f.Seek(0, io.SeekStart)
 894         n, err = f.Read(buf)
 895         c.Check(buf[:n], check.DeepEquals, []byte{1, 2, 3, 4, 5, 6})
 896         c.Check(err, check.Equals, io.EOF)
 897         f.Close()
 898
 899         f, err = fs.OpenFile("append", os.O_RDWR|os.O_APPEND, 0)
 900         c.Assert(err, check.IsNil)
 901         pos, err = f.Seek(0, io.SeekCurrent)
 902         c.Check(pos, check.Equals, int64(0))
 903         c.Check(err, check.IsNil)
 904         f.Read(buf[:3])
 905         pos, _ = f.Seek(0, io.SeekCurrent)
 906         c.Check(pos, check.Equals, int64(3))
 907         f.Write([]byte{7, 8, 9})
 908         pos, err = f.Seek(0, io.SeekCurrent)
 909         c.Check(err, check.IsNil)
 910         c.Check(pos, check.Equals, int64(9))
 911         f.Close()
 912
 913         f, err = fs.OpenFile("wronly", os.O_CREATE|os.O_WRONLY, 0)
 914         c.Assert(err, check.IsNil)
 915         n, err = f.Write([]byte{3, 2, 1})
 916         c.Check(n, check.Equals, 3)
 917         c.Check(err, check.IsNil)
 918         pos, _ = f.Seek(0, io.SeekCurrent)
 919         c.Check(pos, check.Equals, int64(3))
 920         pos, _ = f.Seek(0, io.SeekStart)
 921         c.Check(pos, check.Equals, int64(0))
 922         n, err = f.Read(buf)
 923         c.Check(n, check.Equals, 0)
 924         c.Check(err, check.ErrorMatches, `.*O_WRONLY.*`)
 925         f, err = fs.OpenFile("wronly", os.O_RDONLY, 0)
 926         c.Assert(err, check.IsNil)
 927         n, _ = f.Read(buf)
 928         c.Check(buf[:n], check.DeepEquals, []byte{3, 2, 1})
 929
 930         f, err = fs.OpenFile("unsupported", os.O_CREATE|os.O_SYNC, 0)
 931         c.Check(f, check.IsNil)
 932         c.Check(err, check.NotNil)
 933
 934         f, err = fs.OpenFile("append", os.O_RDWR|os.O_WRONLY, 0)
 935         c.Check(f, check.IsNil)
 936         c.Check(err, check.ErrorMatches, `invalid flag.*`)
 937 }
 938
 939 func (s *CollectionFSSuite) TestFlushFullBlocks(c *check.C) {
 940         maxBlockSize = 1024
 941         defer func() { maxBlockSize = 2 << 26 }()
 942
 943         fs, err := (&Collection{}).FileSystem(s.client, s.kc)
 944         c.Assert(err, check.IsNil)
 945         f, err := fs.OpenFile("50K", os.O_WRONLY|os.O_CREATE, 0)
 946         c.Assert(err, check.IsNil)
 947         defer f.Close()
 948
 949         data := make([]byte, 500)
 950         rand.Read(data)
 951
 952         for i := 0; i < 100; i++ {
 953                 n, err := f.Write(data)
 954                 c.Assert(n, check.Equals, len(data))
 955                 c.Assert(err, check.IsNil)
 956         }
 957
 958         currentMemExtents := func() (memExtents []int) {
 959                 for idx, e := range f.(*filehandle).inode.(*filenode).segments {
 960                         switch e.(type) {
 961                         case *memSegment:
 962                                 memExtents = append(memExtents, idx)
 963                         }
 964                 }
 965                 return
 966         }
 967         c.Check(currentMemExtents(), check.HasLen, 1)
 968
 969         m, err := fs.MarshalManifest(".")
 970         c.Check(m, check.Matches, `[^:]* 0:50000:50K\n`)
 971         c.Check(err, check.IsNil)
 972         c.Check(currentMemExtents(), check.HasLen, 0)
 973 }
 974
 975 func (s *CollectionFSSuite) TestBrokenManifests(c *check.C) {
 976         for _, txt := range []string{
 977                 "\n",
 978                 ".\n",
 979                 ". \n",
 980                 ". d41d8cd98f00b204e9800998ecf8427e+0\n",
 981                 ". d41d8cd98f00b204e9800998ecf8427e+0 \n",
 982                 ". 0:0:foo\n",
 983                 ".  0:0:foo\n",
 984                 ". 0:0:foo 0:0:bar\n",
 985                 ". d41d8cd98f00b204e9800998ecf8427e 0:0:foo\n",
 986                 ". d41d8cd98f00b204e9800998ecf8427e+0 :0:0:foo\n",
 987                 ". d41d8cd98f00b204e9800998ecf8427e+0 foo:0:foo\n",
 988                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:foo:foo\n",
 989                 ". d41d8cd98f00b204e9800998ecf8427e+1 0:1:foo 1:1:bar\n",
 990                 ". d41d8cd98f00b204e9800998ecf8427e+1 0:0:foo\n./foo d41d8cd98f00b204e9800998ecf8427e+1 0:0:bar\n",
 991                 "./foo d41d8cd98f00b204e9800998ecf8427e+1 0:0:bar\n. d41d8cd98f00b204e9800998ecf8427e+1 0:0:foo\n",
 992         } {
 993                 c.Logf("<-%q", txt)
 994                 fs, err := (&Collection{ManifestText: txt}).FileSystem(s.client, s.kc)
 995                 c.Check(fs, check.IsNil)
 996                 c.Logf("-> %s", err)
 997                 c.Check(err, check.NotNil)
 998         }
 999 }
1000
1001 func (s *CollectionFSSuite) TestEdgeCaseManifests(c *check.C) {
1002         for _, txt := range []string{
1003                 "",
1004                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo\n",
1005                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo 0:0:foo 0:0:bar\n",
1006                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo 0:0:foo 0:0:bar\n",
1007                 ". d41d8cd98f00b204e9800998ecf8427e+0 0:0:foo/bar\n./foo d41d8cd98f00b204e9800998ecf8427e+0 0:0:bar\n",
1008         } {
1009                 c.Logf("<-%q", txt)
1010                 fs, err := (&Collection{ManifestText: txt}).FileSystem(s.client, s.kc)
1011                 c.Check(err, check.IsNil)
1012                 c.Check(fs, check.NotNil)
1013         }
1014 }
1015
1016 func (s *CollectionFSSuite) checkMemSize(c *check.C, f File) {
1017         fn := f.(*filehandle).inode.(*filenode)
1018         var memsize int64
1019         for _, seg := range fn.segments {
1020                 if e, ok := seg.(*memSegment); ok {
1021                         memsize += int64(len(e.buf))
1022                 }
1023         }
1024         c.Check(fn.memsize, check.Equals, memsize)
1025 }
1026
1027 type CollectionFSUnitSuite struct{}
1028
1029 var _ = check.Suite(&CollectionFSUnitSuite{})
1030
1031 // expect ~2 seconds to load a manifest with 256K files
1032 func (s *CollectionFSUnitSuite) TestLargeManifest(c *check.C) {
1033         if testing.Short() {
1034                 c.Skip("slow")
1035         }
1036
1037         const (
1038                 dirCount  = 512
1039                 fileCount = 512
1040         )
1041
1042         mb := bytes.NewBuffer(make([]byte, 0, 40000000))
1043         for i := 0; i < dirCount; i++ {
1044                 fmt.Fprintf(mb, "./dir%d", i)
1045                 for j := 0; j <= fileCount; j++ {
1046                         fmt.Fprintf(mb, " %032x+42+A%040x@%08x", j, j, j)
1047                 }
1048                 for j := 0; j < fileCount; j++ {
1049                         fmt.Fprintf(mb, " %d:%d:dir%d/file%d", j*42+21, 42, j, j)
1050                 }
1051                 mb.Write([]byte{'\n'})
1052         }
1053         coll := Collection{ManifestText: mb.String()}
1054         c.Logf("%s built", time.Now())
1055
1056         var memstats runtime.MemStats
1057         runtime.ReadMemStats(&memstats)
1058         c.Logf("%s Alloc=%d Sys=%d", time.Now(), memstats.Alloc, memstats.Sys)
1059
1060         f, err := coll.FileSystem(nil, nil)
1061         c.Check(err, check.IsNil)
1062         c.Logf("%s loaded", time.Now())
1063
1064         for i := 0; i < dirCount; i++ {
1065                 for j := 0; j < fileCount; j++ {
1066                         f.Stat(fmt.Sprintf("./dir%d/dir%d/file%d", i, j, j))
1067                 }
1068         }
1069         c.Logf("%s Stat() x %d", time.Now(), dirCount*fileCount)
1070
1071         runtime.ReadMemStats(&memstats)
1072         c.Logf("%s Alloc=%d Sys=%d", time.Now(), memstats.Alloc, memstats.Sys)
1073 }
1074
1075 // Gocheck boilerplate
1076 func Test(t *testing.T) {
1077         check.TestingT(t)
1078 }