mirror of
https://github.com/octoleo/restic.git
synced 2024-11-16 18:15:20 +00:00
117 lines
2.6 KiB
Go
117 lines
2.6 KiB
Go
package fuse
|
|
|
|
import (
|
|
"os"
|
|
"sync"
|
|
"time"
|
|
|
|
"bazil.org/fuse"
|
|
"bazil.org/fuse/fs"
|
|
|
|
"github.com/restic/restic"
|
|
"github.com/restic/restic/backend"
|
|
"github.com/restic/restic/repository"
|
|
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
type SnapshotWithId struct {
|
|
*restic.Snapshot
|
|
backend.ID
|
|
}
|
|
|
|
// These lines statically ensure that a *SnapshotsDir implement the given
|
|
// interfaces; a misplaced refactoring of the implementation that breaks
|
|
// the interface will be catched by the compiler
|
|
var _ = fs.HandleReadDirAller(&SnapshotsDir{})
|
|
var _ = fs.NodeStringLookuper(&SnapshotsDir{})
|
|
|
|
type SnapshotsDir struct {
|
|
repo *repository.Repository
|
|
ownerIsRoot bool
|
|
|
|
// knownSnapshots maps snapshot timestamp to the snapshot
|
|
sync.RWMutex
|
|
knownSnapshots map[string]SnapshotWithId
|
|
}
|
|
|
|
func NewSnapshotsDir(repo *repository.Repository, ownerIsRoot bool) *SnapshotsDir {
|
|
return &SnapshotsDir{
|
|
repo: repo,
|
|
knownSnapshots: make(map[string]SnapshotWithId),
|
|
ownerIsRoot: ownerIsRoot,
|
|
}
|
|
}
|
|
|
|
func (sn *SnapshotsDir) Attr(ctx context.Context, attr *fuse.Attr) error {
|
|
attr.Inode = 0
|
|
attr.Mode = os.ModeDir | 0555
|
|
|
|
if !sn.ownerIsRoot {
|
|
attr.Uid = uint32(os.Getuid())
|
|
attr.Gid = uint32(os.Getgid())
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (sn *SnapshotsDir) updateCache(ctx context.Context) error {
|
|
sn.Lock()
|
|
defer sn.Unlock()
|
|
|
|
for id := range sn.repo.List(backend.Snapshot, ctx.Done()) {
|
|
snapshot, err := restic.LoadSnapshot(sn.repo, id)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
sn.knownSnapshots[snapshot.Time.Format(time.RFC3339)] = SnapshotWithId{snapshot, id}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (sn *SnapshotsDir) get(name string) (snapshot SnapshotWithId, ok bool) {
|
|
sn.RLock()
|
|
snapshot, ok = sn.knownSnapshots[name]
|
|
sn.RUnlock()
|
|
return snapshot, ok
|
|
}
|
|
|
|
func (sn *SnapshotsDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
|
|
err := sn.updateCache(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
sn.RLock()
|
|
defer sn.RUnlock()
|
|
|
|
ret := make([]fuse.Dirent, 0)
|
|
for _, snapshot := range sn.knownSnapshots {
|
|
ret = append(ret, fuse.Dirent{
|
|
Inode: inodeFromBackendId(snapshot.ID),
|
|
Type: fuse.DT_Dir,
|
|
Name: snapshot.Time.Format(time.RFC3339),
|
|
})
|
|
}
|
|
|
|
return ret, nil
|
|
}
|
|
|
|
func (sn *SnapshotsDir) Lookup(ctx context.Context, name string) (fs.Node, error) {
|
|
snapshot, ok := sn.get(name)
|
|
|
|
if !ok {
|
|
// We don't know about it, update the cache
|
|
err := sn.updateCache(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
snapshot, ok = sn.get(name)
|
|
if !ok {
|
|
// We still don't know about it, this time it really doesn't exist
|
|
return nil, fuse.ENOENT
|
|
}
|
|
}
|
|
|
|
return newDirFromSnapshot(sn.repo, snapshot, sn.ownerIsRoot)
|
|
}
|