summaryrefslogtreecommitdiff
path: root/internal/fusefrontend/xattr_linux.go
blob: 5df0617676f965d241b2b736ee6d36e2aa83adb9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
// +build linux

// Package fusefrontend interfaces directly with the go-fuse library.
package fusefrontend

import (
	"fmt"
	"syscall"

	"golang.org/x/sys/unix"

	"github.com/hanwen/go-fuse/v2/fuse"

	"github.com/rfjakob/gocryptfs/internal/syscallcompat"
)

func (fs *FS) getXAttr(relPath string, cAttr string, context *fuse.Context) ([]byte, fuse.Status) {
	dirfd, cName, err := fs.openBackingDir(relPath)
	if err != nil {
		return nil, fuse.ToStatus(err)
	}
	defer syscall.Close(dirfd)

	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
	cData, err := syscallcompat.Lgetxattr(procPath, cAttr)
	if err != nil {
		return nil, fuse.ToStatus(err)
	}
	return cData, fuse.OK
}

func (fs *FS) setXAttr(relPath string, cAttr string, cData []byte, flags int, context *fuse.Context) fuse.Status {
	dirfd, cName, err := fs.openBackingDir(relPath)
	if err != nil {
		return fuse.ToStatus(err)
	}
	defer syscall.Close(dirfd)

	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
	err = unix.Lsetxattr(procPath, cAttr, cData, flags)
	return fuse.ToStatus(err)
}

func (fs *FS) removeXAttr(relPath string, cAttr string, context *fuse.Context) fuse.Status {
	dirfd, cName, err := fs.openBackingDir(relPath)
	if err != nil {
		return fuse.ToStatus(err)
	}
	defer syscall.Close(dirfd)

	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
	err = unix.Lremovexattr(procPath, cAttr)
	return fuse.ToStatus(err)
}

func (fs *FS) listXAttr(relPath string, context *fuse.Context) ([]string, fuse.Status) {
	dirfd, cName, err := fs.openBackingDir(relPath)
	if err != nil {
		return nil, fuse.ToStatus(err)
	}
	defer syscall.Close(dirfd)

	procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
	cNames, err := syscallcompat.Llistxattr(procPath)
	if err != nil {
		return nil, fuse.ToStatus(err)
	}
	return cNames, fuse.OK
}