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454d856be8
Instead of calculating the PeerAPI URL at the time that we add the peer, we now calculate it on every access to the peer. This way, if we initially did not have a shared address family with the peer, but later do, this allows us to access the peer at that point. This follows the pattern from other places where we access the peer API, which also calculate the URL on an as-needed basis. Additionally, we now show peers as not Available when we can't get a peer API URL. Lastly, this moves some of the more frequent verbose Taildrive logging from [v1] to [v2] level. Updates #29702 Signed-off-by: Percy Wegmann <percy@tailscale.com>
98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package driveimpl provides an implementation of package drive.
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package driveimpl
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import (
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"log"
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"net"
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"net/http"
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"time"
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"tailscale.com/drive"
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"tailscale.com/drive/driveimpl/compositedav"
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"tailscale.com/drive/driveimpl/dirfs"
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"tailscale.com/types/logger"
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)
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const (
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// statCacheTTL causes the local WebDAV proxy to cache file metadata to
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// avoid excessive network roundtrips. This is similar to the
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// DirectoryCacheLifetime setting of Windows' built-in SMB client,
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// see https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-7/ff686200(v=ws.10)
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statCacheTTL = 10 * time.Second
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)
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// NewFileSystemForLocal starts serving a filesystem for local clients.
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// Inbound connections must be handed to HandleConn.
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func NewFileSystemForLocal(logf logger.Logf) *FileSystemForLocal {
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return newFileSystemForLocal(logf, &compositedav.StatCache{TTL: statCacheTTL})
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}
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func newFileSystemForLocal(logf logger.Logf, statCache *compositedav.StatCache) *FileSystemForLocal {
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if logf == nil {
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logf = log.Printf
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}
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fs := &FileSystemForLocal{
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logf: logf,
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h: &compositedav.Handler{
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Logf: logf,
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StatCache: statCache,
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},
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listener: newConnListener(),
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}
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fs.startServing()
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return fs
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}
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// FileSystemForLocal is the Taildrive filesystem exposed to local clients. It
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// provides a unified WebDAV interface to remote Taildrive shares on other nodes.
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type FileSystemForLocal struct {
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logf logger.Logf
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h *compositedav.Handler
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listener *connListener
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}
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func (s *FileSystemForLocal) startServing() {
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hs := &http.Server{Handler: s.h}
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go func() {
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err := hs.Serve(s.listener)
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if err != nil {
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// TODO(oxtoacart): should we panic or something different here?
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log.Printf("serve: %v", err)
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}
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}()
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}
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// HandleConn handles connections from local WebDAV clients
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func (s *FileSystemForLocal) HandleConn(conn net.Conn, remoteAddr net.Addr) error {
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return s.listener.HandleConn(conn, remoteAddr)
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}
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// SetRemotes sets the complete set of remotes on the given tailnet domain
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// using a map of name -> url. If transport is specified, that transport
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// will be used to connect to these remotes.
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func (s *FileSystemForLocal) SetRemotes(domain string, remotes []*drive.Remote, transport http.RoundTripper) {
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children := make([]*compositedav.Child, 0, len(remotes))
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for _, remote := range remotes {
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children = append(children, &compositedav.Child{
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Child: &dirfs.Child{
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Name: remote.Name,
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Available: remote.Available,
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},
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BaseURL: func() (string, error) { return remote.URL(), nil },
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Transport: transport,
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})
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}
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s.h.SetChildren(domain, children...)
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}
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// Close() stops serving the WebDAV content
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func (s *FileSystemForLocal) Close() error {
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err := s.listener.Close()
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s.h.Close()
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return err
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}
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