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Code Issues Releases Wiki Activity

fuse: Fix inode handling

This commit is contained in:
Alexander Neumann 2017-06-18 15:11:32 +02:00
parent 52752659c1
commit a66760d86d
5 changed files with 42 additions and 72 deletions
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47
src/restic/fuse/dir.go
View File

@ -19,18 +19,17 @@ var _ = fs.HandleReadDirAller(&dir{})
var _ = fs.NodeStringLookuper(&dir{})
type dir struct {
repo restic.Repository
items map[string]*restic.Node
inode uint64
node *restic.Node
ownerIsRoot bool
root *Root
items map[string]*restic.Node
inode uint64
node *restic.Node
blobsize *BlobSizeCache
}
func newDir(ctx context.Context, repo restic.Repository, node *restic.Node, ownerIsRoot bool, blobsize *BlobSizeCache) (*dir, error) {
func newDir(ctx context.Context, root *Root, inode uint64, node *restic.Node) (*dir, error) {
debug.Log("new dir for %v (%v)", node.Name, node.Subtree.Str())
tree, err := repo.LoadTree(ctx, *node.Subtree)
tree, err := root.repo.LoadTree(ctx, *node.Subtree)
if err != nil {
debug.Log(" error loading tree %v: %v", node.Subtree.Str(), err)
return nil, err
@ -41,12 +40,10 @@ func newDir(ctx context.Context, repo restic.Repository, node *restic.Node, owne
}
return &dir{
repo: repo,
node: node,
items: items,
inode: node.Inode,
ownerIsRoot: ownerIsRoot,
blobsize: blobsize,
root: root,
node: node,
items: items,
inode: inode,
}, nil
}
@ -69,16 +66,16 @@ func replaceSpecialNodes(ctx context.Context, repo restic.Repository, node *rest
return tree.Nodes, nil
}
func newDirFromSnapshot(ctx context.Context, repo restic.Repository, snapshot *restic.Snapshot, ownerIsRoot bool, blobsize *BlobSizeCache) (*dir, error) {
func newDirFromSnapshot(ctx context.Context, root *Root, inode uint64, snapshot *restic.Snapshot) (*dir, error) {
debug.Log("new dir for snapshot %v (%v)", snapshot.ID().Str(), snapshot.Tree.Str())
tree, err := repo.LoadTree(ctx, *snapshot.Tree)
tree, err := root.repo.LoadTree(ctx, *snapshot.Tree)
if err != nil {
debug.Log(" loadTree(%v) failed: %v", snapshot.ID().Str(), err)
return nil, err
}
items := make(map[string]*restic.Node)
for _, n := range tree.Nodes {
nodes, err := replaceSpecialNodes(ctx, repo, n)
nodes, err := replaceSpecialNodes(ctx, root.repo, n)
if err != nil {
debug.Log(" replaceSpecialNodes(%v) failed: %v", n, err)
return nil, err
@ -90,7 +87,7 @@ func newDirFromSnapshot(ctx context.Context, repo restic.Repository, snapshot *r
}
return &dir{
repo: repo,
root: root,
node: &restic.Node{
UID: uint32(os.Getuid()),
GID: uint32(os.Getgid()),
@ -99,10 +96,8 @@ func newDirFromSnapshot(ctx context.Context, repo restic.Repository, snapshot *r
ChangeTime: snapshot.Time,
Mode: os.ModeDir | 0555,
},
items: items,
inode: inodeFromBackendID(*snapshot.ID()),
ownerIsRoot: ownerIsRoot,
blobsize: blobsize,
items: items,
inode: inode,
}, nil
}
@ -111,7 +106,7 @@ func (d *dir) Attr(ctx context.Context, a *fuse.Attr) error {
a.Inode = d.inode
a.Mode = os.ModeDir | d.node.Mode
if !d.ownerIsRoot {
if !d.root.cfg.OwnerIsRoot {
a.Uid = d.node.UID
a.Gid = d.node.GID
}
@ -153,7 +148,7 @@ func (d *dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
}
ret = append(ret, fuse.Dirent{
Inode: node.Inode,
Inode: fs.GenerateDynamicInode(d.inode, node.Name),
Type: typ,
Name: node.Name,
})
@ -171,11 +166,11 @@ func (d *dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
}
switch node.Type {
case "dir":
return newDir(ctx, d.repo, node, d.ownerIsRoot, d.blobsize)
return newDir(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
case "file":
return newFile(d.repo, node, d.ownerIsRoot, d.blobsize)
return newFile(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
case "symlink":
return newLink(d.repo, node, d.ownerIsRoot)
return newLink(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
default:
debug.Log(" node %v has unknown type %v", name, node.Type)
return nil, fuse.ENOENT

2
src/restic/fuse/dir_snapshots.go
View File

@ -101,5 +101,5 @@ func (d *DirSnapshots) Lookup(ctx context.Context, name string) (fs.Node, error)
return nil, fuse.ENOENT
}
return newDirFromSnapshot(ctx, d.root.repo, sn, d.root.cfg.OwnerIsRoot, d.root.blobSizeCache)
return newDirFromSnapshot(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), sn)
}

36
src/restic/fuse/file.go
View File

@ -9,8 +9,6 @@ import (
"restic"
"restic/debug"
scontext "context"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"golang.org/x/net/context"
@ -23,30 +21,23 @@ const blockSize = 512
var _ = fs.HandleReader(&file{})
var _ = fs.HandleReleaser(&file{})
// BlobLoader is an abstracted repository with a reduced set of methods used
// for fuse operations.
type BlobLoader interface {
LookupBlobSize(restic.ID, restic.BlobType) (uint, error)
LoadBlob(scontext.Context, restic.BlobType, restic.ID, []byte) (int, error)
}
type file struct {
repo BlobLoader
node *restic.Node
ownerIsRoot bool
root *Root
node *restic.Node
inode uint64
sizes []int
blobs [][]byte
}
func newFile(repo BlobLoader, node *restic.Node, ownerIsRoot bool, blobsize *BlobSizeCache) (fusefile *file, err error) {
func newFile(ctx context.Context, root *Root, inode uint64, node *restic.Node) (fusefile *file, err error) {
debug.Log("create new file for %v with %d blobs", node.Name, len(node.Content))
var bytes uint64
sizes := make([]int, len(node.Content))
for i, id := range node.Content {
size, ok := blobsize.Lookup(id)
size, ok := root.blobSizeCache.Lookup(id)
if !ok {
size, err = repo.LookupBlobSize(id, restic.DataBlob)
size, err = root.repo.LookupBlobSize(id, restic.DataBlob)
if err != nil {
return nil, err
}
@ -62,24 +53,23 @@ func newFile(repo BlobLoader, node *restic.Node, ownerIsRoot bool, blobsize *Blo
}
return &file{
repo: repo,
node: node,
sizes: sizes,
blobs: make([][]byte, len(node.Content)),
ownerIsRoot: ownerIsRoot,
root: root,
node: node,
sizes: sizes,
blobs: make([][]byte, len(node.Content)),
}, nil
}
func (f *file) Attr(ctx context.Context, a *fuse.Attr) error {
debug.Log("Attr(%v)", f.node.Name)
a.Inode = f.node.Inode
a.Inode = f.inode
a.Mode = f.node.Mode
a.Size = f.node.Size
a.Blocks = (f.node.Size / blockSize) + 1
a.BlockSize = blockSize
a.Nlink = uint32(f.node.Links)
if !f.ownerIsRoot {
if !f.root.cfg.OwnerIsRoot {
a.Uid = f.node.UID
a.Gid = f.node.GID
}
@ -103,7 +93,7 @@ func (f *file) getBlobAt(ctx context.Context, i int) (blob []byte, err error) {
}
buf := restic.NewBlobBuffer(f.sizes[i])
n, err := f.repo.LoadBlob(ctx, restic.DataBlob, f.node.Content[i], buf)
n, err := f.root.repo.LoadBlob(ctx, restic.DataBlob, f.node.Content[i], buf)
if err != nil {
debug.Log("LoadBlob(%v, %v) failed: %v", f.node.Name, f.node.Content[i], err)
return nil, err

16
src/restic/fuse/fuse.go
View File

@ -1,16 +0,0 @@
// +build !openbsd
// +build !windows
package fuse
import (
"encoding/binary"
"restic"
)
// inodeFromBackendId returns a unique uint64 from a backend id.
// Endianness has no specific meaning, it is just the simplest way to
// transform a []byte to an uint64
func inodeFromBackendID(id restic.ID) uint64 {
return binary.BigEndian.Uint64(id[:8])
}

13
src/restic/fuse/link.go
View File

@ -15,12 +15,13 @@ import (
var _ = fs.NodeReadlinker(&link{})
type link struct {
node *restic.Node
ownerIsRoot bool
root *Root
node *restic.Node
inode uint64
}
func newLink(repo restic.Repository, node *restic.Node, ownerIsRoot bool) (*link, error) {
return &link{node: node, ownerIsRoot: ownerIsRoot}, nil
func newLink(ctx context.Context, root *Root, inode uint64, node *restic.Node) (*link, error) {
return &link{root: root, inode: inode, node: node}, nil
}
func (l *link) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
@ -28,10 +29,10 @@ func (l *link) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string,
}
func (l *link) Attr(ctx context.Context, a *fuse.Attr) error {
a.Inode = l.node.Inode
a.Inode = l.inode
a.Mode = l.node.Mode
if !l.ownerIsRoot {
if !l.root.cfg.OwnerIsRoot {
a.Uid = l.node.UID
a.Gid = l.node.GID
}