From 0fa824933cfc8788450138a2d2e52c3dea2e592f Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 12 Jul 2020 20:17:15 +0200
Subject: v2api: properly implement Node.Setattr

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
---
 internal/fusefrontend/file2_setattr.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'internal/fusefrontend/file2_setattr.go')

diff --git a/internal/fusefrontend/file2_setattr.go b/internal/fusefrontend/file2_setattr.go
index 697e0d9..1385f3f 100644
--- a/internal/fusefrontend/file2_setattr.go
+++ b/internal/fusefrontend/file2_setattr.go
@@ -29,7 +29,7 @@ func (f *File2) setAttr(ctx context.Context, in *fuse.SetAttrIn) (errno syscall.
 	f.fileTableEntry.ContentLock.Lock()
 	defer f.fileTableEntry.ContentLock.Unlock()
 
-	// chmod(2) & fchmod(2)
+	// fchmod(2)
 	if mode, ok := in.GetMode(); ok {
 		errno = fs.ToErrno(syscall.Fchmod(f.intFd(), mode))
 		if errno != 0 {
@@ -37,7 +37,7 @@ func (f *File2) setAttr(ctx context.Context, in *fuse.SetAttrIn) (errno syscall.
 		}
 	}
 
-	// chown(2) & fchown(2)
+	// fchown(2)
 	uid32, uOk := in.GetUID()
 	gid32, gOk := in.GetGID()
 	if uOk || gOk {
-- 
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