restic/internal/fuse/root.go

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//go:build darwin || freebsd || linux
// +build darwin freebsd linux
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package fuse
import (
"os"
"github.com/restic/restic/internal/bloblru"
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"github.com/restic/restic/internal/debug"
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"github.com/restic/restic/internal/restic"
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"github.com/anacrolix/fuse/fs"
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)
// Config holds settings for the fuse mount.
type Config struct {
OwnerIsRoot bool
Filter restic.SnapshotFilter
TimeTemplate string
PathTemplates []string
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}
// Root is the root node of the fuse mount of a repository.
type Root struct {
repo restic.Repository
cfg Config
blobCache *bloblru.Cache
*SnapshotsDir
uid, gid uint32
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}
// ensure that *Root implements these interfaces
var _ = fs.HandleReadDirAller(&Root{})
var _ = fs.NodeStringLookuper(&Root{})
const rootInode = 1
// Size of the blob cache. TODO: make this configurable.
const blobCacheSize = 64 << 20
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// NewRoot initializes a new root node from a repository.
func NewRoot(repo restic.Repository, cfg Config) *Root {
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debug.Log("NewRoot(), config %v", cfg)
root := &Root{
repo: repo,
cfg: cfg,
blobCache: bloblru.New(blobCacheSize),
}
if !cfg.OwnerIsRoot {
root.uid = uint32(os.Getuid())
root.gid = uint32(os.Getgid())
}
// set defaults, if PathTemplates is not set
if len(cfg.PathTemplates) == 0 {
cfg.PathTemplates = []string{
"ids/%i",
"snapshots/%T",
"hosts/%h/%T",
"tags/%t/%T",
}
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}
root.SnapshotsDir = NewSnapshotsDir(root, rootInode, rootInode, NewSnapshotsDirStructure(root, cfg.PathTemplates, cfg.TimeTemplate), "")
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return root
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}
// Root is just there to satisfy fs.Root, it returns itself.
func (r *Root) Root() (fs.Node, error) {
debug.Log("Root()")
return r, nil
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}