diff options
Diffstat (limited to 'internal/fusefrontend_reverse/root_node.go')
| -rw-r--r-- | internal/fusefrontend_reverse/root_node.go | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/internal/fusefrontend_reverse/root_node.go b/internal/fusefrontend_reverse/root_node.go index e15ddb0..cb8b95f 100644 --- a/internal/fusefrontend_reverse/root_node.go +++ b/internal/fusefrontend_reverse/root_node.go @@ -42,6 +42,9 @@ type RootNode struct { // rootDev stores the device number of the backing directory. Used for // --one-file-system. rootDev uint64 + // If a file name length is shorter than shortNameMax, there is no need to + // hash it. + shortNameMax int } // NewRootNode returns an encrypted FUSE overlay filesystem. @@ -50,6 +53,7 @@ type RootNode struct { func NewRootNode(args fusefrontend.Args, c *contentenc.ContentEnc, n *nametransform.NameTransform) *RootNode { var rootDev uint64 var st syscall.Stat_t + var shortNameMax int if err := syscall.Stat(args.Cipherdir, &st); err != nil { tlog.Warn.Printf("Could not stat backing directory %q: %v", args.Cipherdir, err) if args.OneFileSystem { @@ -60,12 +64,16 @@ func NewRootNode(args fusefrontend.Args, c *contentenc.ContentEnc, n *nametransf rootDev = uint64(st.Dev) } + shortNameMax = n.GetLongNameMax() * 3 / 4 + shortNameMax = shortNameMax - shortNameMax % 16 - 1 + rn := &RootNode{ args: args, nameTransform: n, contentEnc: c, inoMap: inomap.New(rootDev), rootDev: rootDev, + shortNameMax: shortNameMax, } if len(args.Exclude) > 0 || len(args.ExcludeWildcard) > 0 || len(args.ExcludeFrom) > 0 { rn.excluder = prepareExcluder(args) @@ -87,16 +95,16 @@ func (rn *RootNode) findLongnameParent(fd int, diriv []byte, longname string) (p return } for _, entry := range entries { - if len(entry.Name) <= shortNameMax { + if len(entry.Name) <= rn.shortNameMax { continue } cFullName, err = rn.nameTransform.EncryptName(entry.Name, diriv) if err != nil { continue } - if len(cFullName) <= unix.NAME_MAX { + if len(cFullName) <= unix.NAME_MAX && len(cFullName) <= rn.nameTransform.GetLongNameMax() { // Entry should have been skipped by the shortNameMax check above - log.Panic("logic error or wrong shortNameMax constant?") + log.Panic("logic error or wrong shortNameMax?") } hName := rn.nameTransform.HashLongName(cFullName) if longname == hName { |