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authorJakob Unterwurzacher2020-06-11 23:39:27 +0200
committerJakob Unterwurzacher2020-06-21 12:01:34 +0200
commit6aa9f5636f03392b5da5fc19dc4ea908e2e55e26 (patch)
treed173bfb7f5d03e9a46026af5c34701a2b06a557d /internal/fusefrontend/node.go
parent9b8ce55383fb6a0a146d0551a63d62b59be6eeb7 (diff)
v2api: implement Lookup()
Compiles, but untested otherwise. No caching.
Diffstat (limited to 'internal/fusefrontend/node.go')
-rw-r--r--internal/fusefrontend/node.go54
1 files changed, 50 insertions, 4 deletions
diff --git a/internal/fusefrontend/node.go b/internal/fusefrontend/node.go
index fde6a1a..f246408 100644
--- a/internal/fusefrontend/node.go
+++ b/internal/fusefrontend/node.go
@@ -2,13 +2,18 @@ package fusefrontend
import (
"context"
+ "path/filepath"
"syscall"
+ "golang.org/x/sys/unix"
+
"github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/rfjakob/gocryptfs/internal/contentenc"
+ "github.com/rfjakob/gocryptfs/internal/inomap"
"github.com/rfjakob/gocryptfs/internal/nametransform"
+ "github.com/rfjakob/gocryptfs/internal/syscallcompat"
)
// Node is a file or directory in the filesystem tree
@@ -20,25 +25,66 @@ type Node struct {
// RootNode is the root of the filesystem tree of Nodes.
type RootNode struct {
Node
-
- // This flag is set to zero each time fs.isFiltered() is called
+ // args stores configuration arguments
+ args Args
+ // Filename encryption helper
+ nameTransform nametransform.NameTransformer
+ // Content encryption helper
+ contentEnc *contentenc.ContentEnc
+ // IsIdle flag is set to zero each time fs.isFiltered() is called
// (uint32 so that it can be reset with CompareAndSwapUint32).
// When -idle was used when mounting, idleMonitor() sets it to 1
// periodically.
IsIdle uint32
+
+ // inoMap translates inode numbers from different devices to unique inode
+ // numbers.
+ inoMap *inomap.InoMap
}
func NewRootNode(args Args, c *contentenc.ContentEnc, n nametransform.NameTransformer) *RootNode {
// TODO
- return &RootNode{}
+ return &RootNode{
+ args: args,
+ nameTransform: n,
+ contentEnc: c,
+ inoMap: inomap.New(),
+ }
}
+// path returns the relative plaintext path of this node
func (n *Node) path() string {
return n.Path(n.Root())
}
+func (n *Node) rootNode() *RootNode {
+ return n.Root().Operations().(*RootNode)
+}
+
func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*fs.Inode, syscall.Errno) {
- return nil, 1
+ rn := n.rootNode()
+ p := filepath.Join(n.path(), name)
+ dirfd, cName, err := rn.openBackingDir(p)
+ if err != nil {
+ return nil, fs.ToErrno(err)
+ }
+ // Get device number and inode number into `st`
+ st, err := syscallcompat.Fstatat2(dirfd, cName, unix.AT_SYMLINK_NOFOLLOW)
+ if err != nil {
+ return nil, fs.ToErrno(err)
+ }
+ // Get unique inode number
+ rn.inoMap.TranslateStat(st)
+ out.Attr.FromStat(st)
+ // Create child node
+ id := fs.StableAttr{
+ Mode: uint32(st.Mode),
+ Gen: 1,
+ Ino: st.Ino,
+ }
+ node := &Node{}
+ ch := n.NewInode(ctx, node, id)
+ return ch, 0
}
func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut) syscall.Errno {