restic/fuse/dir.go

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package fuse
import (
"os"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"golang.org/x/net/context"
"github.com/restic/restic"
"github.com/restic/restic/repository"
)
// Statically ensure that *dir implement those interface
var _ = fs.HandleReadDirAller(&dir{})
var _ = fs.NodeStringLookuper(&dir{})
type dir struct {
repo *repository.Repository
items map[string]*restic.Node
inode uint64
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node *restic.Node
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}
func newDir(repo *repository.Repository, node *restic.Node) (*dir, error) {
tree, err := restic.LoadTree(repo, *node.Subtree)
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if err != nil {
return nil, err
}
items := make(map[string]*restic.Node)
for _, node := range tree.Nodes {
items[node.Name] = node
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}
return &dir{
repo: repo,
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node: node,
items: items,
inode: node.Inode,
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}, nil
}
func newDirFromSnapshot(repo *repository.Repository, snapshot SnapshotWithId) (*dir, error) {
tree, err := restic.LoadTree(repo, *snapshot.Tree)
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if err != nil {
return nil, err
}
items := make(map[string]*restic.Node)
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for _, node := range tree.Nodes {
items[node.Name] = node
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}
return &dir{
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repo: repo,
node: &restic.Node{
UID: uint32(os.Getuid()),
GID: uint32(os.Getgid()),
AccessTime: snapshot.Time,
ModTime: snapshot.Time,
ChangeTime: snapshot.Time,
Mode: os.ModeDir | 0555,
},
items: items,
inode: inodeFromBackendId(snapshot.ID),
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}, nil
}
func (d *dir) Attr(ctx context.Context, a *fuse.Attr) error {
a.Inode = d.inode
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a.Mode = os.ModeDir | d.node.Mode
a.Uid = d.node.UID
a.Gid = d.node.GID
a.Atime = d.node.AccessTime
a.Ctime = d.node.ChangeTime
a.Mtime = d.node.ModTime
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return nil
}
func (d *dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
ret := make([]fuse.Dirent, 0, len(d.items))
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for _, node := range d.items {
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var typ fuse.DirentType
switch node.Type {
case "dir":
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typ = fuse.DT_Dir
case "file":
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typ = fuse.DT_File
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case "symlink":
typ = fuse.DT_Link
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}
ret = append(ret, fuse.Dirent{
Inode: node.Inode,
Type: typ,
Name: node.Name,
})
}
return ret, nil
}
func (d *dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
node, ok := d.items[name]
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if !ok {
return nil, fuse.ENOENT
}
switch node.Type {
case "dir":
return newDir(d.repo, node)
case "file":
return newFile(d.repo, node)
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case "symlink":
return newLink(d.repo, node)
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default:
return nil, fuse.ENOENT
}
}