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This option is similar to fuse(8) kernel_cache
Verified using vmtouch.
Without -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0242321 s, 433 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011159 seconds
Files: 1
Directories: 0
Resident Pages: 0/2560 0/10M 0%
Elapsed: 0.000993 seconds
With -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0244015 s, 430 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011564 seconds
Files: 1
Directories: 0
Resident Pages: 2560/2560 10M/10M 100%
Elapsed: 0.000369 seconds
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We don't implement Getattr(), so don't try to call it.
Reported at https://github.com/rfjakob/gocryptfs/issues/519#issuecomment-718790790 :
15:22:53.414101 rx 3344: READ n2565 {Fh 7 [42143744 +131072) L 0 RDONLY,0x8000}
15:22:53.414274 rx 3342: READ n2565 {Fh 7 [42012672 +131072) L 0 RDONLY,0x8000}
15:22:53.414787 rx 3346: READ n2565 {Fh 7 [42274816 +131072) L 0 RDONLY,0x8000}
15:22:53.414806 tx 3336: OK, 131072b data "\xcb\xd3<\"!-\xa7\xc4"...
15:22:53.414874 rx 3348: GETATTR n1446 {Fh 0}
panic: interface conversion: *fusefrontend_reverse.File is not fs.FileGetattrer: missing method Getattr
goroutine 451 [running]:
github.com/rfjakob/gocryptfs/internal/fusefrontend_reverse.(*Node).Getattr(0xc00034c880, 0x5620579784c0, 0xc000593e60, 0x562057939800, 0xc000218050, 0xc0000fc108, 0x0)
github.com/rfjakob/gocryptfs/internal/fusefrontend_reverse/node.go:69 +0x273
github.com/hanwen/go-fuse/v2/fs.(*rawBridge).getattr(0xc00011e000, 0x5620579784c0, 0xc000593e60, 0xc00034c880, 0x562057939800, 0xc000218050, 0xc0000fc108, 0xbfded1ef58ba7b13)
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fs/bridge.go:500 +0x2d4
github.com/hanwen/go-fuse/v2/fs.(*rawBridge).GetAttr(0xc00011e000, 0xc0000e0000, 0xc0000fc198, 0xc0000fc108, 0x0)
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fs/bridge.go:488 +0x11c
github.com/hanwen/go-fuse/v2/fuse.doGetAttr(0xc000120000, 0xc0000fc000)
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fuse/opcode.go:287 +0x6f
github.com/hanwen/go-fuse/v2/fuse.(*Server).handleRequest(0xc000120000, 0xc0000fc000, 0xc000000000)
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fuse/server.go:472 +0x2c1
github.com/hanwen/go-fuse/v2/fuse.(*Server).loop(0xc000120000, 0xc000288001)
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fuse/server.go:445 +0x18c
created by github.com/hanwen/go-fuse/v2/fuse.(*Server).readRequest
github.com/hanwen/go-fuse/v2@v2.0.4-0.20200908172753-0b6cbc515082/fuse/server.go:312 +0x419
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These were committed by mistake.
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These were committed by mistake.
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Unless we are mounted with -suid, we can reject
these requests, and gain back some lost speed.
Closes https://github.com/rfjakob/gocryptfs/issues/515
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The allocations from Lgetxattr were #1 in the tar extract
allocation profile (caused by security.capability lookups).
No more!
$ benchstat old.txt new.txt
name old time/op new time/op delta
Lgetxattr-4 15.2µs ± 0% 1.8µs ± 0% ~ (p=1.000 n=1+1)
$ ./benchmark.bash
Testing gocryptfs at /tmp/benchmark.bash.H8p: gocryptfs v2.0-beta1-4-g95ea738-dirty; go-fuse v2.0.4-0.20200908172753-0b6cbc515082 => github.com/rfjakob/go-fuse/v2 v2.0.4-0.20201015204057-88b12c99f8af; 2020-10-18 go1.15.3 linux/amd64
/tmp/benchmark.bash.H8p.mnt is a mountpoint
WRITE: 262144000 bytes (262 MB, 250 MiB) copied, 0,520109 s, 504 MB/s
READ: 262144000 bytes (262 MB, 250 MiB) copied, 0,255672 s, 1,0 GB/s
UNTAR: 30,238
MD5: 12,721
LS: 10,038
RM: 16,536
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Served its mission a copy-paste source but can now be deleted.
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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.
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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 .
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Towards fixing https://github.com/rfjakob/gocryptfs/issues/507
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Rename the symbols and the files.
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Tests pass now.
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Exclude in readdir is missing.
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fusefrontend_reverse -> fusefrontend_reverse_v1api
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All the functionality in these files has been reimplemented
for the v2 api. Drop the old files.
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This also fixes the last remaining tests/fsck failure.
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Helpful for fsck.
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gocryptfs/tests/xattr passes.
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We used to always open a *File2 and letting the *File2
handle Setattr. This does not work it we cannot open the file!
Before:
$ go test
2020/07/12 20:14:57 writer: Write/Writev failed, err: 2=no such file or directory. opcode: INTERRUPT
2020/07/12 20:14:57 writer: Write/Writev failed, err: 2=no such file or directory. opcode: INTERRUPT
--- FAIL: TestLchown (0.00s)
matrix_test.go:634: lchown /tmp/gocryptfs-test-parent-1026/014500839/default-plain/symlink: too many levels of symbolic links
touch: setting times of '/tmp/gocryptfs-test-parent-1026/014500839/default-plain/utimesnano_symlink': Too many levels of symbolic links
--- FAIL: TestUtimesNanoSymlink (0.00s)
matrix_test.go:655: exit status 1
--- FAIL: TestMkfifo (0.00s)
matrix_test.go:755: file exists
--- FAIL: TestMagicNames (0.00s)
matrix_test.go:773: Testing n="gocryptfs.longname.QhUr5d9FHerwEs--muUs6_80cy6JRp89c1otLwp92Cs"
matrix_test.go:773: Testing n="gocryptfs.diriv"
matrix_test.go:815: open /tmp/gocryptfs-test-parent-1026/014500839/default-plain/linktarget: permission denied
--- FAIL: TestChmod (0.00s)
matrix_test.go:840: chmod 444 -> 000 failed: permission denied
matrix_test.go:840: chmod 444 -> 111 failed: permission denied
matrix_test.go:840: chmod 444 -> 123 failed: permission denied
matrix_test.go:840: chmod 444 -> 321 failed: permission denied
FAIL
exit status 1
FAIL github.com/rfjakob/gocryptfs/tests/matrix 0.790s
After:
$ go test
--- FAIL: TestMkfifo (0.00s)
matrix_test.go:755: file exists
--- FAIL: TestMagicNames (0.00s)
matrix_test.go:773: Testing n="gocryptfs.longname.QhUr5d9FHerwEs--muUs6_80cy6JRp89c1otLwp92Cs"
matrix_test.go:773: Testing n="gocryptfs.diriv"
matrix_test.go:815: open /tmp/gocryptfs-test-parent-1026/501766059/default-plain/linktarget: permission denied
--- FAIL: TestChmod (0.00s)
matrix_test.go:849: modeHave 0644 != modeWant 0
FAIL
exit status 1
FAIL github.com/rfjakob/gocryptfs/tests/matrix 0.787s
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If we don't, reads hang with -serialize_reads.
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We used to do this
[pid 99182] renameat2(14, "Y_4DAxKvj1QnXmJx2AkrKA", 15, ".", RENAME_NOREPLACE <unfinished ...>
which was not the intention.
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