84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
// +build linux
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// Package fusefrontend interfaces directly with the go-fuse library.
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package fusefrontend
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import (
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"fmt"
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"strings"
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"syscall"
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"golang.org/x/sys/unix"
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"github.com/hanwen/go-fuse/fuse"
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"github.com/rfjakob/gocryptfs/internal/syscallcompat"
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)
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// Only allow the "user" namespace, block "trusted" and "security", as
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// these may be interpreted by the system, and we don't want to cause
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// trouble with our encrypted garbage.
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const xattrUserPrefix = "user."
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func disallowedXAttrName(attr string) bool {
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return !strings.HasPrefix(attr, xattrUserPrefix)
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}
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func filterXattrSetFlags(flags int) int {
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return flags
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}
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func (fs *FS) getXAttr(relPath string, cAttr string, context *fuse.Context) ([]byte, fuse.Status) {
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dirfd, cName, err := fs.openBackingDir(relPath)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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defer syscall.Close(dirfd)
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procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
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cData, err := syscallcompat.Lgetxattr(procPath, cAttr)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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return cData, fuse.OK
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}
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func (fs *FS) setXAttr(relPath string, cAttr string, cData []byte, flags int, context *fuse.Context) fuse.Status {
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dirfd, cName, err := fs.openBackingDir(relPath)
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if err != nil {
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return fuse.ToStatus(err)
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}
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defer syscall.Close(dirfd)
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procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
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err = unix.Lsetxattr(procPath, cAttr, cData, flags)
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return fuse.ToStatus(err)
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}
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func (fs *FS) removeXAttr(relPath string, cAttr string, context *fuse.Context) fuse.Status {
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dirfd, cName, err := fs.openBackingDir(relPath)
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if err != nil {
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return fuse.ToStatus(err)
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}
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defer syscall.Close(dirfd)
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procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
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err = unix.Lremovexattr(procPath, cAttr)
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return fuse.ToStatus(err)
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}
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func (fs *FS) listXAttr(relPath string, context *fuse.Context) ([]string, fuse.Status) {
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dirfd, cName, err := fs.openBackingDir(relPath)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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defer syscall.Close(dirfd)
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procPath := fmt.Sprintf("/proc/self/fd/%d/%s", dirfd, cName)
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cNames, err := syscallcompat.Llistxattr(procPath)
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if err != nil {
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return nil, fuse.ToStatus(err)
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}
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return cNames, fuse.OK
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}
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