Sandy LuppinoandNick Craig-Wood
c1b5756eec
Mknod is now implemented by mount, mount2 and cmount, so exercise it from the shared vfstest suite: create a regular file (S_IFREG) through the mounted path and check it reads back as a 0-byte regular file. This is the path the kernel NFS server drives when a client creates a file over an exported mount. Before this there was no shared coverage for Mknod; it now runs against each backend via RunTests. Suggested in #9548. Signed-off-by: Sandy Luppino <s.luppino@opendrives.com>
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
//go:build linux || darwin || freebsd || openbsd
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package vfstest
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import (
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"os"
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"runtime"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/unix"
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)
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// TestMknod checks that Mknod creates a regular file through the mount.
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//
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// The VFS only supports regular files (S_IFREG) - this is the path the
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// kernel NFS server drives when a client creates a file over an exported
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// mount (device nodes are rejected). All three mount backends (mount,
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// mount2, cmount) implement Mknod, so this runs against each via RunTests.
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func TestMknod(t *testing.T) {
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run.skipIfVFS(t) // Mknod is a mount syscall; no Mknod on the direct-VFS pass
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run.skipIfNoFUSE(t)
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if runtime.GOOS == "darwin" {
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t.Skip("Skipping test on OSX") // macFUSE Mknod support is unreliable
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}
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const name = "testmknod"
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path := run.path(name)
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// S_IFREG => regular file; dev 0 since it is not a device node.
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err := unix.Mknod(path, unix.S_IFREG|0640, 0)
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require.NoError(t, err)
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fi, err := os.Stat(path)
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require.NoError(t, err)
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assert.Truef(t, fi.Mode().IsRegular(), "expected a regular file, got mode %v", fi.Mode())
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assert.Equal(t, int64(0), fi.Size())
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run.waitForWriters()
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run.rm(t, name)
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}
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