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ocis: allow setting owner of root #1225

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Oct 7, 2020
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5 changes: 5 additions & 0 deletions changelog/unreleased/ocis-set-owner.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
Enhancement: Allow setting the owner when using the ocis driver

To support the metadata storage we allow setting the owner of the root node so that subsequent requests with that owner can be used to manage the storage.

https://github.com/cs3org/reva/pull/1225
13 changes: 10 additions & 3 deletions pkg/storage/fs/ocis/ocis.go
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ import (
"path/filepath"
"strings"

userv1beta1 "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
"github.com/cs3org/reva/pkg/appctx"
"github.com/cs3org/reva/pkg/errtypes"
Expand Down Expand Up @@ -122,6 +123,7 @@ func New(m map[string]interface{}) (storage.FS, error) {
}
o.init(m)

// create data paths for internal layout
dataPaths := []string{
filepath.Join(o.Root, "nodes"),
// notes contain symlinks from nodes/<u-u-i-d>/uploads/<uploadid> to ../../uploads/<uploadid>
Expand All @@ -141,9 +143,14 @@ func New(m map[string]interface{}) (storage.FS, error) {
Options: o,
}

// the root node has an empty name, or use `.` ?
// the root node has no parent, or use `root` ?
if err = createNode(&Node{lu: lu, ID: "root"}, nil); err != nil {
// the root node has an empty name
// the root node has no parent
if err = createNode(
&Node{lu: lu, ID: "root"},
&userv1beta1.UserId{
OpaqueId: o.Owner,
},
); err != nil {
return nil, err
}

Expand Down
3 changes: 3 additions & 0 deletions pkg/storage/fs/ocis/option.go
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,9 @@ type Options struct {

// propagate size changes as treesize
TreeSizeAccounting bool `mapstructure:"treesize_accounting"`

// set an owner for the root node
Owner string `mapstructure:"owner"`
}

// newOptions initializes the available default options.
Expand Down
28 changes: 19 additions & 9 deletions pkg/storage/fs/ocis/tree.go
Original file line number Diff line number Diff line change
Expand Up @@ -94,17 +94,27 @@ func (t *Tree) CreateDir(ctx context.Context, node *Node) (err error) {
// create a directory node
node.ID = uuid.New().String()

if t.lu.Options.EnableHome {
if u, ok := user.ContextGetUser(ctx); ok {
err = createNode(node, u.Id)
} else {
log := appctx.GetLogger(ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from ctx")
}
} else {
// who will become the owner?
u, ok := user.ContextGetUser(ctx)
switch {
case ok:
// we have a user in context
err = createNode(node, u.Id)
case t.lu.Options.EnableHome:
// enable home requires a user
log := appctx.GetLogger(ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from ctx")
case t.lu.Options.Owner != "":
// fallback to owner?
err = createNode(node, &userpb.UserId{
OpaqueId: t.lu.Options.Owner,
})
default:
// fallback to parent owner?
err = createNode(node, nil)
}

if err != nil {
return nil
}
Expand Down
74 changes: 55 additions & 19 deletions pkg/storage/fs/ocis/upload.go
Original file line number Diff line number Diff line change
Expand Up @@ -83,12 +83,14 @@ func (fs *ocisfs) Upload(ctx context.Context, ref *provider.Reference, r io.Read
nodePath := fs.lu.toInternalPath(n.ID)

var tmp *os.File
tmp, err = ioutil.TempFile(nodePath, "._reva_atomic_upload")
tmp, err = ioutil.TempFile(filepath.Dir(nodePath), "._reva_atomic_upload")
if err != nil {
return errors.Wrap(err, "ocisfs: error creating tmp fn at "+nodePath)
}

_, err = io.Copy(tmp, r)
r.Close()
tmp.Close()
if err != nil {
return errors.Wrap(err, "ocisfs: error writing to tmp file "+tmp.Name())
}
Expand All @@ -97,25 +99,53 @@ func (fs *ocisfs) Upload(ctx context.Context, ref *provider.Reference, r io.Read
//_ = os.RemoveAll(path.Join(nodePath, "content"))
appctx.GetLogger(ctx).Warn().Msg("TODO move old content to version")

appctx.GetLogger(ctx).Debug().Str("tmp", tmp.Name()).Str("ipath", nodePath).Msg("moving tmp to content")
if err = os.Rename(tmp.Name(), nodePath); err != nil {
return
}

if fs.o.EnableHome {
if u, ok := user.ContextGetUser(ctx); ok {
err = n.writeMetadata(u.Id)
} else {
log := appctx.GetLogger(ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from ctx")
}
} else {
// who will become the owner?
u, ok := user.ContextGetUser(ctx)
switch {
case ok:
err = n.writeMetadata(u.Id)
case fs.o.EnableHome:
log := appctx.GetLogger(ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from ctx")
case fs.o.Owner != "":
err = n.writeMetadata(&userpb.UserId{
OpaqueId: fs.o.Owner,
})
default:
// fallback to parent owner?
err = n.writeMetadata(nil)
}
if err != nil {
return
}

// link child name to parent if it is new
childNameLink := filepath.Join(fs.lu.toInternalPath(n.ParentID), n.Name)
var link string
link, err = os.Readlink(childNameLink)
if err == nil && link != "../"+n.ID {
log.Err(err).
Interface("node", n).
Str("childNameLink", childNameLink).
Str("link", link).
Msg("ocisfs: child name link has wrong target id, repairing")

if err = os.Remove(childNameLink); err != nil {
return errors.Wrap(err, "ocisfs: could not remove symlink child entry")
}
}
if os.IsNotExist(err) || link != "../"+n.ID {
if err = os.Symlink("../"+n.ID, childNameLink); err != nil {
return errors.Wrap(err, "ocisfs: could not symlink child entry")
}
}

if fs.o.TreeTimeAccounting {
// mark the home node as the end of propagation q
if err = xattr.Set(nodePath, propagationAttr, []byte("1")); err != nil {
Expand Down Expand Up @@ -442,15 +472,21 @@ func (upload *fileUpload) FinishUpload(ctx context.Context) (err error) {
Msg("ocisfs: could not rename")
return
}
if upload.fs.o.EnableHome {
if u, ok := user.ContextGetUser(upload.ctx); ok {
err = n.writeMetadata(u.Id)
} else {
log := appctx.GetLogger(upload.ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from ctx")
}
} else {
// who will become the owner?
u, ok := user.ContextGetUser(upload.ctx)
switch {
case ok:
err = n.writeMetadata(u.Id)
case upload.fs.o.EnableHome:
log := appctx.GetLogger(upload.ctx)
log.Error().Msg("home support enabled but no user in context")
err = errors.Wrap(errtypes.UserRequired("userrequired"), "error getting user from upload ctx")
case upload.fs.o.Owner != "":
err = n.writeMetadata(&userpb.UserId{
OpaqueId: upload.fs.o.Owner,
})
default:
// fallback to parent owner?
err = n.writeMetadata(nil)
}
if err != nil {
Expand Down