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path: root/internal/fusefrontend/file.go
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2021-03-21fusefronted: move Create() and Open() to new fileJakob Unterwurzacher
And deduplicate the code a little.
2020-10-14syscallcompat: don't retry Close()Jakob Unterwurzacher
After Close() returns, the fd is dead, even if we received EINTR. Don't retry, we could shoot down an unrelated fd that received the same fd number.
2020-10-14syscallcompat: retry ops on EINTRJakob Unterwurzacher
Retry operations that have been shown to throw EINTR errors on CIFS. Todo: Solution for this pain in the back: warning: unix.Getdents returned errno 2 in the middle of data rm: cannot remove 'linux-3.0.old3/Documentation/ABI/removed': Input/output error Progress towards fixing https://github.com/rfjakob/gocryptfs/issues/483 .
2020-08-16v2api: rename "File2" to just "File"Jakob Unterwurzacher
Rename the symbols and the files.
2020-07-26v2api: delete (most) fusefrontend v1 filesJakob Unterwurzacher
All the functionality in these files has been reimplemented for the v2 api. Drop the old files.
2020-05-17Update go-fuse import path to github.com/hanwen/go-fuse/v2Jakob Unterwurzacher
We need https://github.com/hanwen/go-fuse/commit/fd7328faf9fdf75709f7ba7df7072aaf4eeb18b3 to fix a crash reported in https://github.com/rfjakob/gocryptfs/issues/430 : 2019/10/30 17:14:16 Unknown opcode 2016 panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x508d38] This patch is only in the v2.x.x branch. Upgrade to v2, as the old API is also supported there. Running git grep hanwen/go-fuse | grep -v hanwen/go-fuse/v2 to check for forgotten references comes back clean.
2020-04-13inomap: split into separate packageJakob Unterwurzacher
inomap will also be used by fusefrontend_reverse in the future. Split if off openfiletable to make it independent.
2019-11-16fusefrontend: use inummapJakob Unterwurzacher
translate inode numbers on different devices to fix collisions. Fixes https://github.com/rfjakob/gocryptfs/issues/435
2019-10-06fusefrontend: unregister from openfiletable before closing the fdJakob Unterwurzacher
Closing the fd means the inode number may be reused immediately by a new file, so we have to get the old fileID out of the table beforehand! Hopefully fixes https://github.com/rfjakob/gocryptfs/issues/363
2019-10-06fusefrontend: print file hexdump on header errorJakob Unterwurzacher
This should help debugging https://github.com/rfjakob/gocryptfs/issues/363 , but does no harm in normal operation as it only prints ciphertext to the log.
2019-01-16fusefrontend: Always use intFd() method instead of int(f.fd.Fd()).Sebastian Lackner
2019-01-16fusefrontend: Rework the Utimens handling on macOS.Sebastian Lackner
For Linux, everything effectively stays the same. For both path-based and fd-based Utimens() calls, we use unix.UtimesNanoAt(). To avoid introducing a separate syscall wrapper for futimens() (as done in go-fuse, for example), we instead use the /proc/self/fd - trick. On macOS, this changes quite a lot: * Path-based Utimens() calls were previously completely broken, since unix.UtimensNanoAt() ignores the passed file descriptor. Note that this cannot be fixed easily since there IS no appropriate syscall available on macOS prior to High Sierra (10.13). We emulate this case by using Fchdir() + setattrlist(). * Fd-based Utimens() calls were previously translated to f.GetAttr() (to fill any empty parameters) and syscall.Futimes(), which does not does support nanosecond precision. Both issues can be fixed by switching to fsetattrlist(). Fixes https://github.com/rfjakob/gocryptfs/issues/350
2019-01-01fusefrontend: Fix debug message in doWrite() method.Sebastian Lackner
2019-01-01fusefrontend: Fix order of arguments in debug message for Read() FUSE call.Sebastian Lackner
2018-12-27fusefrontend: Remove unnecessary check in doRead function.Sebastian Lackner
The same condition is already checked a few lines above, and 'err' is not changed inbetween.
2018-10-17fusefronted: log more details on WriteAt failuresJakob Unterwurzacher
Also log inode number, fd number, offset and length. Maybe help debugging https://github.com/rfjakob/gocryptfs/issues/269 .
2018-07-22fusefronted: disallow writes running concurrently with readsJakob Unterwurzacher
As uncovered by xfstests generic/465, concurrent reads and writes could lead to this, doRead 3015532: corrupt block #1039: stupidgcm: message authentication failed, as the read could pick up a block that has not yet been completely written - write() is not atomic! Now writes take ContentLock exclusively, while reads take it shared, meaning that multiple reads can run in parallel with each other, but not with a write. This also simplifies the file header locking.
2018-07-15fusefrontend: doWrite: delete file header if first write failsJakob Unterwurzacher
xfstests generic/083 fills the filesystem almost completely while running fsstress in parallel. In fsck, these would show up: readFileID 2580: incomplete file, got 18 instead of 19 bytes This could happen when writing the file header works, but writing the actual data fails. Now we kill the header again by truncating the file to zero.
2018-07-15fusefrontend: doWrite: no need to take HeaderLock.RLock()Jakob Unterwurzacher
Other writers are blocked by ContentLock already.
2018-07-14fusefrontend: log prealloc failures at Info levelJakob Unterwurzacher
If the underlying filesystem is full, it is normal get ENOSPC here. Log at Info level instead of Warning. Fixes xfstests generic/015 and generic/027, which complained about the extra output.
2018-07-01Fix golint warningsJakob Unterwurzacher
2018-07-01fusefrontend: export "File" typeJakob Unterwurzacher
"gocryptfs -fsck" will need access to helper functions, and to get that, it will need to cast a gofuse.File to a fusefrontend.File. Make fusefrontend.File exported to make this work.
2018-07-01fsck: rename "CorruptItems" channel to "MitigatedCorruptions"Jakob Unterwurzacher
Make it clear that this channel is only used to report corruptions that are transparently mitigated and do not return an error to the user.
2018-04-03fsck: report skipped corrupt filesJakob Unterwurzacher
OpenDir and ListXAttr skip over corrupt entries, readFileID treats files the are too small as empty. This improves usability in the face of corruption, but hides the problem in a log message instead of putting it in the return code. Create a channel to report these corruptions to fsck so it can report them to the user. Also update the manpage and the changelog with the -fsck option. Closes https://github.com/rfjakob/gocryptfs/issues/191
2018-04-02fsck: clean up log outputJakob Unterwurzacher
Make sure we get only 1 warning output per problem. Also, add new corruption types to broken_fs_v1.4.
2018-04-01fusefronted: reject oversized Read and Write requestsJakob Unterwurzacher
This should not happen via FUSE as the kernel caps the size, but with fsck we have the first user that calls Read directly. For symmetry, check it for Write as well.
2017-10-21Revert most of "fusefrontend: clamp oversized reads"Jakob Unterwurzacher
We cannot return less data than requested to the kernel! From https://libfuse.github.io/doxygen/structfuse__operations.html: Read should return exactly the number of bytes requested except on EOF or error, otherwise the rest of the data will be substituted with zeroes. Reverts commit 3009ec9852316c3c696f77f476390ab5a6d8d6d7 minus the formatting improvements we want to keep. Fixes https://github.com/rfjakob/gocryptfs/issues/147 Reopens https://github.com/rfjakob/gocryptfs/issues/145
2017-10-17fusefrontend: clamp oversized readsJakob Unterwurzacher
Our byte cache pools are sized acc. to MAX_KERNEL_WRITE, but the running kernel may have a higher limit set. Clamp to what we can handle. Fixes a panic on a Synology NAS reported at https://github.com/rfjakob/gocryptfs/issues/145
2017-07-02fusefrontend: doRead: skip decryption for an empty readJakob Unterwurzacher
Previously we ran through the decryption steps even for an empty ciphertext slice. The functions handle it correctly, but returning early skips all the extra calls. Speeds up the tar extract benchmark by about 4%.
2017-06-30contentenc: add PReqPool and use it in DecryptBlocksJakob Unterwurzacher
This gets us a massive speed boost in streaming reads.
2017-06-30fusefrontend: doRead: use CReqPool for ciphertext bufferJakob Unterwurzacher
Easily saves lots of allocations.
2017-06-30fusefrontend: Read: use provided bufferJakob Unterwurzacher
This will allow us to return internal buffers to a pool.
2017-06-29contentenc: add safer "bPool" pool variant; add pBlockPoolJakob Unterwurzacher
bPool verifies the lengths of slices going in and out. Also, add a plaintext block pool - pBlockPool - and use it for decryption.
2017-06-20contentenc: use sync.Pool memory pools for encryptionJakob Unterwurzacher
We use two levels of buffers: 1) 4kiB+overhead for each ciphertext block 2) 128kiB+overhead for each FUSE write (32 ciphertext blocks) This commit adds a sync.Pool for both levels. The memory-efficiency for small writes could be improved, as we now always use a 128kiB buffer.
2017-06-09Fix missing Owner coercion for already-open files (#117)Charles Duffy
2017-06-01fusefrontend: write: consolidate and move encryption to contentencJakob Unterwurzacher
Collect all the plaintext and pass everything to contentenc in one call. This will allow easier parallization of the encryption. https://github.com/rfjakob/gocryptfs/issues/116
2017-05-01openfiletable: rename WriteLock to ContentLockJakob Unterwurzacher
...and IDLock to HeaderLock. This matches what the locks actually protect.
2017-05-01fusefrontend: rely on nodefs.defaultFile for no-op functionsJakob Unterwurzacher
Now that we embed nodefs.NewDefaultFile(), we can drop our own no-ops.
2017-05-01fusefrontend: drop writeOnly flagJakob Unterwurzacher
We do not have to track the writeOnly status because the kernel will not forward read requests on a write-only FD to us anyway. I have verified this behavoir manually on a 4.10.8 kernel and also added a testcase.
2017-05-01fusefronted, openfiletable: move the open file table to its own packageJakob Unterwurzacher
The open file table code needs some room to grow for the upcoming FD multiplexing implementation.
2017-04-29fusefronted: drop unused file.String() functionJakob Unterwurzacher
This is a very old leftover.
2017-04-24forcedecode: tighten checksJakob Unterwurzacher
...and fix a few golint issues and print a scary warning message on mount. Also, force the fs to ro,noexec.
2017-04-23Add -forcedecodedanim7
Force decode of encrypted files even if the integrity check fails, instead of failing with an IO error. Warning messages are still printed to syslog if corrupted files are encountered. It can be useful to recover files from disks with bad sectors or other corrupted media. Closes https://github.com/rfjakob/gocryptfs/pull/102 .
2017-04-23Fix Flock build breakageJakob Unterwurzacher
go-fuse has added a new method to the nodefs.File interface that caused this build error: internal/fusefrontend/file.go:75: cannot use file literal (type *file) as type nodefs.File in return argument: *file does not implement nodefs.File (missing Flock method) Fixes https://github.com/rfjakob/gocryptfs/issues/104 and prevents the problem from happening again.
2017-03-18fusefrontend: get rid of leftover debug outputJakob Unterwurzacher
2017-03-18serialize_reads: add read serialization logicJakob Unterwurzacher
Due to kernel readahead, we usually get multiple read requests at the same time. These get submitted to the backing storage in random order, which is a problem if seeking is very expensive. Details: https://github.com/rfjakob/gocryptfs/issues/92
2017-03-12fusefrontend: readFileID: reject files that consist only of a headerJakob Unterwurzacher
A header-only file will be considered empty (this is not supposed to happen). This makes File ID poisoning more difficult.
2016-11-25main, fusefrontend: add "-noprealloc" optionJakob Unterwurzacher
Preallocation is very slow on hdds that run btrfs. Give the user the option to disable it. This greatly speeds up small file operations but reduces the robustness against out-of-space errors. Also add the option to the man page. More info: https://github.com/rfjakob/gocryptfs/issues/63
2016-11-25fusefrontend: coalesce 4kB writesJakob Unterwurzacher
This improves performance on hdds running ext4, and improves streaming write performance on hdds running btrfs. Tar extract slows down on btrfs for some reason. See https://github.com/rfjakob/gocryptfs/issues/63 Benchmarks: encfs v1.9.1 ============ $ ./benchmark.bash -encfs /mnt/hdd-ext4 Testing EncFS at /mnt/hdd-ext4/benchmark.bash.u0g WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 1,48354 s, 88,4 MB/s UNTAR: 20.79 LS: 3.04 RM: 6.62 $ ./benchmark.bash -encfs /mnt/hdd-btrfs Testing EncFS at /mnt/hdd-btrfs/benchmark.bash.h40 WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 1,52552 s, 85,9 MB/s UNTAR: 24.51 LS: 2.73 RM: 5.32 gocryptfs v1.1.1-26-g4a7f8ef ============================ $ ./benchmark.bash /mnt/hdd-ext4 Testing gocryptfs at /mnt/hdd-ext4/benchmark.bash.1KG WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 1,55782 s, 84,1 MB/s UNTAR: 22.23 LS: 1.47 RM: 4.17 $ ./benchmark.bash /mnt/hdd-btrfs Testing gocryptfs at /mnt/hdd-btrfs/benchmark.bash.2t8 WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 6,87206 s, 19,1 MB/s UNTAR: 69.87 LS: 1.52 RM: 5.33 gocryptfs v1.1.1-32 =================== $ ./benchmark.bash /mnt/hdd-ext4 Testing gocryptfs at /mnt/hdd-ext4/benchmark.bash.Qt3 WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 1,22577 s, 107 MB/s UNTAR: 23.46 LS: 1.46 RM: 4.67 $ ./benchmark.bash /mnt/hdd-btrfs/ Testing gocryptfs at /mnt/hdd-btrfs//benchmark.bash.XVk WRITE: 131072000 bytes (131 MB, 125 MiB) copied, 3,68735 s, 35,5 MB/s UNTAR: 116.87 LS: 1.84 RM: 6.34
2016-11-17fusefrontend: get the file ID from the open files tableJakob Unterwurzacher
This fixes the problem that a truncate can reset the file ID without the other open FDs noticing it.
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