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fuse: forget fs.Node instances on request by the kernel

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Forget fs.Node instances once the kernel frees the corresponding nodeId.
This ensures that restic does not run out of memory on large snapshots.
This commit is contained in:
Michael Eischer
2024-09-09 22:37:51 +02:00
parent e9940f39dc
commit 51173c5003
8 changed files with 86 additions and 39 deletions
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16
internal/fuse/link.go
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@@ -12,18 +12,20 @@ import (
)
// Statically ensure that *link implements the given interface
var _ = fs.NodeForgetter(&link{})
var _ = fs.NodeGetxattrer(&link{})
var _ = fs.NodeListxattrer(&link{})
var _ = fs.NodeReadlinker(&link{})
type link struct {
root *Root
node *restic.Node
inode uint64
root *Root
forget forgetFn
node *restic.Node
inode uint64
}
func newLink(root *Root, inode uint64, node *restic.Node) (*link, error) {
return &link{root: root, inode: inode, node: node}, nil
func newLink(root *Root, forget forgetFn, inode uint64, node *restic.Node) (*link, error) {
return &link{root: root, forget: forget, inode: inode, node: node}, nil
}
func (l *link) Readlink(_ context.Context, _ *fuse.ReadlinkRequest) (string, error) {
@@ -57,3 +59,7 @@ func (l *link) Listxattr(_ context.Context, req *fuse.ListxattrRequest, resp *fu
func (l *link) Getxattr(_ context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
return nodeGetXattr(l.node, req, resp)
}
func (l *link) Forget() {
l.forget()
}