1. 20 May, 2022 2 commits
    • Han-Wen Nienhuys's avatar
      unionfs: remove library · f4cec619
      Han-Wen Nienhuys authored
      This library was created as a mechanism to overlay a writable checkout
      for Git on top of Google's readonly SrcFS filesystem. This use case
      has long disappeared, and the unionfs library appears unused
      otherwise. Due to its reliance on timestamps and delays, it is very
      susceptible to flakiness in tests.
      
      Fixing this seems hard or maybe even impossible, so just remove the
      library.
      
      Change-Id: I6c594a724a0579b5c4c3aada76cd7013195fda94
      f4cec619
    • Han-Wen Nienhuys's avatar
      posixtest: provide more detail for failing ReadDir test · d8187fce
      Han-Wen Nienhuys authored
      Change-Id: I2b996ca3bfd1ea7e605e4dfd785cba2796340cd5
      d8187fce
  2. 12 Jan, 2022 1 commit
    • Jakob Unterwurzacher's avatar
      fuse: decode MKNOD result in debug output · f57e95bd
      Jakob Unterwurzacher authored
      MKNOD returns an EntryOut that we can decode.
      
      Before:
      
      20:27:39.722507 rx 24914: MKNOD n1 {010644 (022), 0} ["pipe"] 5b
      20:27:39.722546 tx 24914:     OK
      
      After:
      
      20: 32:39.156352 rx 38: MKNOD n1 {010644 (022), 0} ["pipe"] 5b
      20: 32:39.156389 tx 38:     OK, {n3 g1 tE=1s tA=1s {M010644 SZ=0 L=1 1027:1027 B0*4096 i0:46906 A 1641756759.155157 M 1641756759.155157 C 1641756759.155157}}
      Change-Id: If40e690219f20459466d7c8f9aa822c7186179dc
      f57e95bd
  3. 11 Jan, 2022 3 commits
    • Jakob Unterwurzacher's avatar
      fuse: fix mounting with MaxWrite < 8kiB · 81c1d52b
      Jakob Unterwurzacher authored
      The readPool size was calculated from MaxWrite not taking
      into account that the kernel fails all reads below 8 kiB.
      
      Fix that by always using at least 8kiB.
      
      Change-Id: I3bd9013be44b00bdc370bac00d00b4a106ec2d07
      81c1d52b
    • Jakob Unterwurzacher's avatar
      fuse: add MaxPages to INIT debug output · e1a5fd2a
      Jakob Unterwurzacher authored
      A later commit will allow setting MaxPages, so show it in the debug output.
      
      Also print MaxReadahead, MaxWrite, TimeGran in decimal instead of hex -
      these are neither bitfields nor addresses, so it seems clearer to have them in decimal.
      
      Before:
      
      22:03:50.020645 rx 2: INIT n0 {7.34 Ra 0x20000 PARALLEL_DIROPS,ASYNC_READ,EXPORT_SUPPORT,AUTO_INVAL_DATA,READDIRPLUS,NO_OPEN_SUPPORT,NO_OPENDIR_SUPPORT,EXPLICIT_INVAL_DATA,POSIX_LOCKS,DONT_MASK,SPLICE_READ,ASYNC_DIO,WRITEBACK_CACHE,HANDLE_KILLPRIV,CACHE_SYMLINKS,SPLICE_WRITE,SPLICE_MOVE,FLOCK_LOCKS,IOCTL_DIR,READDIRPLUS_AUTO,ABORT_ERROR,ATOMIC_O_TRUNC,BIG_WRITES,POSIX_ACL,MAX_PAGES,0x30000000}
      22:03:50.020665 tx 2:     OK, {7.28 Ra 0x20000 AUTO_INVAL_DATA,READDIRPLUS,NO_OPEN_SUPPORT,PARALLEL_DIROPS,ASYNC_READ,MAX_PAGES,BIG_WRITES 0/0 Wr 0x2000 Tg 0x0}
      
      After:
      
      22: 02:51.374635 rx 2: INIT n0 {7.34 Ra 131072 POSIX_LOCKS,ATOMIC_O_TRUNC,DONT_MASK,FLOCK_LOCKS,AUTO_INVAL_DATA,READDIRPLUS_AUTO,PARALLEL_DIROPS,MAX_PAGES,ASYNC_READ,EXPORT_SUPPORT,BIG_WRITES,SPLICE_WRITE,SPLICE_READ,HANDLE_KILLPRIV,WRITEBACK_CACHE,CACHE_SYMLINKS,NO_OPENDIR_SUPPORT,EXPLICIT_INVAL_DATA,SPLICE_MOVE,IOCTL_DIR,READDIRPLUS,ASYNC_DIO,NO_OPEN_SUPPORT,POSIX_ACL,ABORT_ERROR,0x30000000}
      22: 02:51.374656 tx 2:     OK, {7.28 Ra 131072 ASYNC_READ,BIG_WRITES,READDIRPLUS,NO_OPEN_SUPPORT,PARALLEL_DIROPS,AUTO_INVAL_DATA,MAX_PAGES 0/0 Wr 8192 Tg 0 MaxPages 2}
      Change-Id: Iea02ad3270615d019413b3306e8a8e7282cd7c52
      e1a5fd2a
    • hotaery's avatar
      fs: update oldParent.children for exchange rename · 91451a73
      hotaery authored
      Change-Id: I7b8d1a6be288324021c846273aceb08eb9010e98
      91451a73
  4. 04 Jan, 2022 1 commit
  5. 19 Dec, 2021 1 commit
    • Jakob Unterwurzacher's avatar
      fuse: prefer fusermount3 over fusermount; add debug output · 934a183e
      Jakob Unterwurzacher authored
      fusermount is (usually) from libfuse v2, and fusermount3 is from
      libfuse v3, which is the actively-developed version.
      
      Importantly, libfuse v3 added ExFAT to the list of filesystems
      that users are allowed to mount on, and libfuse v2 did not.
      
      The only ABI difference between fusermount and fusermount3 that
      I am aware of is that fusermount3 dropped the allow_empty option.
      
      Filesystems had to deal with that already, as fusermount may
      also be from libfuse v3, depending on what the distro does.
      
      This commit also adds two lines of debug output about which binary
      we actually call.
      
      Passes all.bash & the gocryptfs test suite.
      
      Fixes https://github.com/hanwen/go-fuse/issues/394
      Fixes https://github.com/rfjakob/gocryptfs/issues/626
      
      Change-Id: Id4574fb9c8d2c812a524181a76616159256d551c
      934a183e
  6. 25 Aug, 2021 5 commits
    • Jakob Unterwurzacher's avatar
      Replace defunct travis ci with github actions · 3ab5d95a
      Jakob Unterwurzacher authored
      The workflow definition is adapted from gocryptfs,
      that uses github actions for a month now.
      
      Works ok as seen here:
      https://github.com/rfjakob/go-fuse/actions/runs/1167431646
      
      (except that some tests are flakey, but that's a
      problem for another day).
      
      Change-Id: Ib7aaa3b0a2f9671040fa599735aa47323d5c25d4
      3ab5d95a
    • Jakob Unterwurzacher's avatar
      Rewrite defunct all.bash · 45c0d70f
      Jakob Unterwurzacher authored
      all.bash is broken for some time now (since the move to v2?).
      Rewrite and simplify it using "./..." syntax.
      
      And add the binaries that are generated to gitignore.
      
      all.bash will be used in the upcomming patch for Github Actions CI.
      
      Change-Id: Ia1b2e6bc60486b419408d4efd50bef4b8dd62bae
      45c0d70f
    • Jakob Unterwurzacher's avatar
      fuse: move parseFuseFd() to unbreak darwin build · 61df8108
      Jakob Unterwurzacher authored
      Unfortunately, I broke darwin with the last commit:
      
      + GOOS=darwin
      + GOARCH=amd64
      + go build -tags without_openssl -o /dev/null
      ../../../../pkg/mod/github.com/hanwen/go-fuse/v2@v2.1.1-0.20210825070001-74a933d6/fuse/server.go:122:5: undefined: parseFuseFd
      ../../../../pkg/mod/github.com/hanwen/go-fuse/v2@v2.1.1-0.20210825070001-74a933d6/fuse/server.go:887:5: undefined: parseFuseFd
      
      Move parseFuseFd() to build on all archs to unbreak the build.
      
      Change-Id: Ice173cc70a6a95765b56b444623b68ed92382052
      61df8108
    • Jakob Unterwurzacher's avatar
      fuse: support special /dev/fd/N mountpoint · 74a933d6
      Jakob Unterwurzacher authored
      libfuse introduced [1] a special `/dev/fd/N` syntax for the mountpoint:
      It means that a privileged parent process:
      
       * Opened /dev/fuse
       * Called mount() on a real mountpoint directory
       * Inherited the fd to /dev/fuse to us
       * Informs us about the fd number via /dev/fd/N
      
      This functionality is used to allow FUSE mounts inside containers
      that have neither root permissions nor suid binaries [2], and
      for the --drop_privileges flag of mount.fuse3 [4]
      
      Tested with singularity and gocryptfs and actually works [3].
      
      v2: Added doccomment for NewServer.
      v3: Added specific error message on Server.Unmount().
      v4: Moved mount details to package comment
      
      [1] https://github.com/libfuse/libfuse/commit/64e11073b9347fcf9c6d1eea143763ba9e946f70
      [2] https://github.com/rfjakob/gocryptfs/issues/590
      [3] $ singularity run --fusemount "host:gocryptfs --extpass echo --extpass test /tmp/a /mnt" docker://ubuntu
          INFO:    Using cached SIF image
          Reading password from extpass program "echo", arguments: ["test"]
          Decrypting master key
          bash: /home/jakob/.cargo/env: No such file or directory
          bash: /home/jakob/.cargo/env: No such file or directory
          bash: /home/jakob/.cargo/env: No such file or directory
          Singularity> Filesystem mounted and ready.
      [4] man mount.fuse3
      
      Change-Id: Ibcc2464b0ef1e3d236207981b487fd9a7d94c910
      74a933d6
    • Jakob Unterwurzacher's avatar
      fuse: refer to fs instead of nodefs & pathfs · 4ba0b1e3
      Jakob Unterwurzacher authored
      Update the package comment to refer to the fs package
      instead of nodefs and pathfs, which are deprecated.
      
      Change-Id: I317e53152b63b982298a7de29120191488dcd362
      4ba0b1e3
  7. 12 Aug, 2021 1 commit
  8. 02 Aug, 2021 2 commits
  9. 01 Aug, 2021 1 commit
    • Jakob Unterwurzacher's avatar
      Run "go mod tidy" · efbe2d7d
      Jakob Unterwurzacher authored
      Drops an obsolete entry pointing to go-fuse v1.0.0.
      
      Change-Id: Iaf8e880d6f39e63b593a7929b8b4ff649c1d7807
      efbe2d7d
  10. 30 Jul, 2021 2 commits
    • Jakob Unterwurzacher's avatar
      fs: fix Inode.IsDir logic · 458f01e0
      Jakob Unterwurzacher authored
      The file type is not a bitmap, and looking at
      
      	S_IFBLK                          = 0x6000
      	S_IFCHR                          = 0x2000
      	S_IFDIR                          = 0x4000
      	S_IFIFO                          = 0x1000
      	S_IFLNK                          = 0xa000
      	S_IFREG                          = 0x8000
      	S_IFSOCK                         = 0xc000
      
      and confirmed by the added test, we used to classify
      block devices and sockets as directories:
      
       --- FAIL: TestInodeIsDir (0.00s)
           inode_test.go:25: wrong result for case struct { mode uint32; dir bool }{mode:0x6000, dir:false}
           inode_test.go:25: wrong result for case struct { mode uint32; dir bool }{mode:0xc000, dir:false}
      
      The check is fixed now and the test passes.
      
      Change-Id: I6490992d1fecc8a6bea7c2c4b2f1bca765d03d4c
      458f01e0
    • Jakob Unterwurzacher's avatar
      fuse: fix deadlock in TestDeleteNotify · bba1094c
      Jakob Unterwurzacher authored
      This
      
      	GOMAXPROCS=1 go test -v -count=1 -run TestDeleteNotify ./fuse/test
      
      deadlocked reliably, apparently in the chdir() from cmd.Start().
      
      We can do without the chdir() by using an absolte path.
      This avoids the issue.
      
      Fixes https://github.com/hanwen/go-fuse/issues/261
      
      Change-Id: Ia9c8f15819c125c5bf94b085fa4c5f2977a6789a
      bba1094c
  11. 11 Jun, 2021 2 commits
  12. 08 Jun, 2021 1 commit
    • Tommy Lindgren's avatar
      fuse: suppress ENOENT warnings for INTERRUPT responses · eefea5e0
      Tommy Lindgren authored
      If writing the INTERRUPT response returns ENOENT it means that the
      referred request is no longer known by the kernel. This is a normal if
      the referred request already has completed. We thus suppress the scary
      warning unless debugging is enabled.
      
      Fixes #375.
      
      Change-Id: I3266dbd8ad53a42db9e0e746e4734f284746b76c
      eefea5e0
  13. 03 Jun, 2021 1 commit
  14. 08 May, 2021 2 commits
  15. 23 Apr, 2021 2 commits
    • Jakob Unterwurzacher's avatar
      fs: track most recent parent · a90e1f46
      Jakob Unterwurzacher authored
      Introduce the new struct inodeParents that wraps a map
      and one special slot for the most recent parent. Unit tests
      included.
      
      Because the map is lazily initialized, we should save some
      memory on the common single-parent case (= file with no hard links)
      compared to before.
      
      Benchmarking with gocryptfs shows no discernible change
      in performance. fsstress testing with gocryptfs shows no issues.
      
      TestStaleHardlinks the previous commit passes now.
      
      Change-Id: I8d69093abc906addde751a9e70dbd78a3a61371a
      a90e1f46
    • Jakob Unterwurzacher's avatar
      fs: tests: add TestStaleHardlinks (fails at the moment) · c3186132
      Jakob Unterwurzacher authored
      This test shows a problem in selecting a random path
      for a node when there is more than one.
      
      The failure looks like this:
      
        18:41:50.796468 rx 136: LOOKUP n1 ["link0"] 6b
        18:41:50.796489 tx 136:     OK, {n2 g1 tE=0s tA=0s {M0100600 SZ=0 L=1 1026:1026 B0*4096 i0:269663 A 1616348510.793212 M 1616348510.793212 C 1616348510.795212}}
        18:41:50.796535 rx 138: OPEN n2 {O_RDONLY,0x8000}
        18:41:50.796557 tx 138:     2=no such file or directory, {Fh 0 }
      
      The LOOKUP succeeds (because the file "link0" is there).
      But the OPEN fails because go-fuse chooses another (stale) path.
      
      I will try to make the behavoir more robust against changes
      behind our back, but this patch only adds a test to show the
      problem.
      
      Change-Id: I39b31ba717ddaaad7dda6ecd86707c75cd25102e
      c3186132
  16. 12 Apr, 2021 1 commit
  17. 10 Apr, 2021 2 commits
  18. 22 Mar, 2021 1 commit
  19. 01 Feb, 2021 1 commit
    • Tommy Lindgren's avatar
      fuse: increase max readers for better throughput · 0f728ba1
      Tommy Lindgren authored
      Previously maximum number of requests readers was hard-coded to 2.
      Setting it to max(2, min(16, GOMAXPROCS)) improves the throughput on
      systems with more cores available. Going beyond 16 readers seems to hurt
      performance even if there are more cores available.
      
      Benchmark GoFuseRead can be used for demonstrating the effects of this
      variable. The benchmark reads 32 streams in parallel from a dummy
      filesystem (read operations immediately return zeros). Example results
      from an i7-8550U (8 cores):
      
      | Max readers | Total throughput |
      | ----------: | ---------------: |
      |           2 |       13217 MB/s |
      |           4 |       19202 MB/s |
      |           8 |       19973 MB/s |
      |          16 |       18994 MB/s |
      
      On a 96 core system:
      
      | Max readers | Total throughput |
      | ----------: | ---------------: |
      |           2 |       11490 MB/s |
      |           4 |       16129 MB/s |
      |           8 |       24263 MB/s |
      |          16 |       29568 MB/s |
      |          32 |       28262 MB/s |
      
      Note that improvements won't be as dramatic for real filesytem
      implementations. In benchmarks for a filesystem doing real work I see a
      30-40% improvement (8.3 -> 11.4 GB/s) on the 96 core system.
      
      Also tweaked some of the other benchmarks so they don't leave behind
      mountpoints.
      
      Fixes #388.
      
      Change-Id: Ibff17d7fc92195f078a9ccff818a31f3a58873f2
      0f728ba1
  20. 25 Jan, 2021 1 commit
  21. 21 Jan, 2021 1 commit
    • Han-Wen Nienhuys's avatar
      fs: allow extending LoopbackNode · e29d3106
      Han-Wen Nienhuys authored
      Make LoopbackNode and LoopbackRoot public, and add an example of how
      to extend them.
      
      Fixes #364.
      
      Change-Id: Idcce1bf3765e93ece3bcf9d14de8a957b8c6b63a
      e29d3106
  22. 04 Jan, 2021 1 commit
  23. 31 Dec, 2020 1 commit
  24. 27 Dec, 2020 4 commits