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Commit09954c4

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fusefrontend: implement our own Access()
Not having Access() means go-fuse emulates it by looking at Getattr().This works fine most of the time, but breaks down on sshfs, wheresshfs-benchmark.bash shows this:gocryptfs/tests$ ./sshfs-benchmark.bash nuetzlich.networking directory: /tmp/sshfs-benchmark.bash.JQCsshfs mounted: nuetzlich.net:/tmp -> sshfs.mntgocryptfs mounted: sshfs.mnt/sshfs-benchmark.bash.Wrz/gocryptfs.crypt -> gocryptfs.mntsshfs-benchmark.bash: sshfs gocryptfs-on-sshfsgit init 3.98 6.80rsync 7.71 10.84rm -R 4.30rm: descend into write-protected directory 'gocryptfs.mnt/git1'?The go-fuse emulation gets it wrong here because sshfs reportspermissions but does not enforce them.Implement it ourselves properly.
1 parent7d1e48d commit09954c4

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‎internal/fusefrontend/node.go‎

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Original file line numberDiff line numberDiff line change
@@ -99,6 +99,17 @@ func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut)
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return0
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}
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func (n*Node)Access(ctx context.Context,modeuint32) syscall.Errno {
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dirfd,cName,errno:=n.prepareAtSyscallMyself()
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iferrno!=0 {
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returnerrno
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}
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defersyscall.Close(dirfd)
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err:=syscallcompat.Faccessat(dirfd,cName,mode)
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returnfs.ToErrno(err)
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}
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// Unlink - FUSE call. Delete a file.
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//
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// Symlink-safe through use of Unlinkat().

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