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authorJakob Unterwurzacher2020-08-02 13:25:53 +0200
committerJakob Unterwurzacher2020-08-02 13:25:53 +0200
commit4674bac8381838718f0defba0f2e0d9eba2a41a3 (patch)
treea33138d2d6c499c19a880cba515d2fc7665e6b28 /internal/fusefrontend_reverse/node.go
parent47d8f56b7f9a7dee760deeaeae3e044c0ab65d6a (diff)
v2api/reverse: implement Lookup for gocryptfs.conf & gocryptfs.diriv
Diffstat (limited to 'internal/fusefrontend_reverse/node.go')
-rw-r--r--internal/fusefrontend_reverse/node.go59
1 files changed, 53 insertions, 6 deletions
diff --git a/internal/fusefrontend_reverse/node.go b/internal/fusefrontend_reverse/node.go
index 8af7bed..0b2df12 100644
--- a/internal/fusefrontend_reverse/node.go
+++ b/internal/fusefrontend_reverse/node.go
@@ -9,6 +9,8 @@ import (
"github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse"
+ "github.com/rfjakob/gocryptfs/internal/configfile"
+ "github.com/rfjakob/gocryptfs/internal/pathiv"
"github.com/rfjakob/gocryptfs/internal/syscallcompat"
)
@@ -19,13 +21,56 @@ type Node struct {
}
// Lookup - FUSE call for discovering a file.
-// TODO handle virtual files
func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch *fs.Inode, errno syscall.Errno) {
- dirfd, pName, errno := n.prepareAtSyscall(name)
- if errno != 0 {
+ dirfd := int(-1)
+ pName := ""
+ t := n.lookupFileType(name)
+ // gocryptfs.conf
+ if t == typeConfig {
+ var err error
+ rn := n.rootNode()
+ dirfd, err = syscallcompat.OpenDirNofollow(rn.args.Cipherdir, "")
+ if err != nil {
+ errno = fs.ToErrno(err)
+ return
+ }
+ defer syscall.Close(dirfd)
+ pName = configfile.ConfReverseName
+ } else if t == typeDiriv {
+ // gocryptfs.diriv
+ dirfd, pName, errno = n.prepareAtSyscall("")
+ if errno != 0 {
+ return
+ }
+ defer syscall.Close(dirfd)
+ st, err := syscallcompat.Fstatat2(dirfd, pName, unix.AT_SYMLINK_NOFOLLOW)
+ if err != nil {
+ errno = fs.ToErrno(err)
+ return
+ }
+ content := pathiv.Derive(n.Path(), pathiv.PurposeDirIV)
+ var vf *virtualFile
+ vf, errno = n.newVirtualFile(content, st, inoTagDirIV)
+ if errno != 0 {
+ return nil, errno
+ }
+ out.Attr = vf.attr
+ // Create child node
+ id := fs.StableAttr{Mode: uint32(vf.attr.Mode), Gen: 1, Ino: vf.attr.Ino}
+ ch = n.NewInode(ctx, vf, id)
return
+ } else if t == typeName {
+ // gocryptfs.longname.*.name
+
+ // TODO
+ } else if t == typeReal {
+ // real file
+ dirfd, pName, errno = n.prepareAtSyscall(name)
+ if errno != 0 {
+ return
+ }
+ defer syscall.Close(dirfd)
}
- defer syscall.Close(dirfd)
// Get device number and inode number into `st`
st, err := syscallcompat.Fstatat2(dirfd, pName, unix.AT_SYMLINK_NOFOLLOW)
@@ -36,8 +81,10 @@ func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch
// Create new inode and fill `out`
ch = n.newChild(ctx, st, out)
- // Translate ciphertext size in `out.Attr.Size` to plaintext size
- n.translateSize(dirfd, pName, &out.Attr)
+ if t == typeReal {
+ // Translate ciphertext size in `out.Attr.Size` to plaintext size
+ n.translateSize(dirfd, pName, &out.Attr)
+ }
return ch, 0
}