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authorJakob Unterwurzacher2020-08-08 18:45:47 +0200
committerJakob Unterwurzacher2020-08-08 18:45:47 +0200
commit527609266386890fe1657c225c643ca448bcd71d (patch)
tree8cb9261b827118311c195cbb6324ffaf87052970 /internal/fusefrontend_reverse/node.go
parent84ed139cd2cede9b773fe7892a0bc2515fc1f00f (diff)
v2api/reverse: implement Readlink
Diffstat (limited to 'internal/fusefrontend_reverse/node.go')
-rw-r--r--internal/fusefrontend_reverse/node.go28
1 files changed, 22 insertions, 6 deletions
diff --git a/internal/fusefrontend_reverse/node.go b/internal/fusefrontend_reverse/node.go
index 713beee..884a97e 100644
--- a/internal/fusefrontend_reverse/node.go
+++ b/internal/fusefrontend_reverse/node.go
@@ -2,6 +2,7 @@ package fusefrontend_reverse
import (
"context"
+ "path/filepath"
"syscall"
"golang.org/x/sys/unix"
@@ -20,16 +21,16 @@ type Node struct {
}
// Lookup - FUSE call for discovering a file.
-func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch *fs.Inode, errno syscall.Errno) {
+func (n *Node) Lookup(ctx context.Context, cName string, out *fuse.EntryOut) (ch *fs.Inode, errno syscall.Errno) {
dirfd := int(-1)
pName := ""
- t := n.lookupFileType(name)
+ t := n.lookupFileType(cName)
if t == typeDiriv {
// gocryptfs.diriv
return n.lookupDiriv(ctx, out)
} else if t == typeName {
// gocryptfs.longname.*.name
- return n.lookupLongnameName(ctx, name, out)
+ return n.lookupLongnameName(ctx, cName, out)
} else if t == typeConfig {
// gocryptfs.conf
var err error
@@ -43,7 +44,7 @@ func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch
defer syscall.Close(dirfd)
} else if t == typeReal {
// real file
- dirfd, pName, errno = n.prepareAtSyscall(name)
+ dirfd, pName, errno = n.prepareAtSyscall(cName)
if errno != 0 {
return
}
@@ -58,7 +59,7 @@ func (n *Node) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (ch
ch = n.newChild(ctx, st, out)
// Translate ciphertext size in `out.Attr.Size` to plaintext size
if t == typeReal {
- n.translateSize(dirfd, pName, &out.Attr)
+ n.translateSize(dirfd, cName, pName, &out.Attr)
}
return ch, 0
}
@@ -89,10 +90,25 @@ func (n *Node) Getattr(ctx context.Context, f fs.FileHandle, out *fuse.AttrOut)
out.Attr.FromStat(st)
// Translate ciphertext size in `out.Attr.Size` to plaintext size
- n.translateSize(dirfd, pName, &out.Attr)
+ cName := filepath.Base(n.Path())
+ n.translateSize(dirfd, cName, pName, &out.Attr)
if rn.args.ForceOwner != nil {
out.Owner = *rn.args.ForceOwner
}
return 0
}
+
+// Readlink - FUSE call.
+//
+// Symlink-safe through openBackingDir() + Readlinkat().
+func (n *Node) Readlink(ctx context.Context) (out []byte, errno syscall.Errno) {
+ dirfd, pName, errno := n.prepareAtSyscall("")
+ if errno != 0 {
+ return
+ }
+ defer syscall.Close(dirfd)
+
+ cName := filepath.Base(n.Path())
+ return n.readlink(dirfd, cName, pName)
+}