Fixed incorrect handling of expiration times in the past.
commit
46edbf19df
38
server.go
38
server.go
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@ -18,8 +18,8 @@ import (
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"fmt"
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"io"
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"log"
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"time"
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"github.com/jacobsa/gcsfuse/timeutil"
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"golang.org/x/net/context"
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bazilfuse "bazil.org/fuse"
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@ -28,7 +28,6 @@ import (
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// An object that terminates one end of the userspace <-> FUSE VFS connection.
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type server struct {
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logger *log.Logger
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clock timeutil.Clock
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fs FileSystem
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}
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@ -36,22 +35,39 @@ type server struct {
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func newServer(fs FileSystem) (s *server, err error) {
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s = &server{
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logger: getLogger(),
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clock: timeutil.RealClock(),
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fs: fs,
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}
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return
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}
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// Convert an absolute cache expiration time to a relative time from now for
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// consumption by fuse.
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func convertExpirationTime(t time.Time) (d time.Duration) {
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// Fuse represents durations as unsigned 64-bit counts of seconds and 32-bit
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// counts of nanoseconds (cf. http://goo.gl/EJupJV). The bazil.org/fuse
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// package converts time.Duration values to this form in a straightforward
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// way (cf. http://goo.gl/FJhV8j).
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//
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// So negative durations are right out. There is no need to cap the positive
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// magnitude, because 2^64 seconds is well longer than the 2^63 ns range of
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// time.Duration.
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d = t.Sub(time.Now())
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if d < 0 {
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d = 0
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}
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return
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}
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func convertChildInodeEntry(
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clock timeutil.Clock,
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in *ChildInodeEntry,
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out *bazilfuse.LookupResponse) {
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out.Node = bazilfuse.NodeID(in.Child)
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out.Generation = uint64(in.Generation)
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out.Attr = convertAttributes(in.Child, in.Attributes)
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out.AttrValid = in.AttributesExpiration.Sub(clock.Now())
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out.EntryValid = in.EntryExpiration.Sub(clock.Now())
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out.AttrValid = convertExpirationTime(in.AttributesExpiration)
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out.EntryValid = convertExpirationTime(in.EntryExpiration)
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}
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func convertHeader(
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@ -142,7 +158,7 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
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// Convert the response.
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fuseResp := &bazilfuse.LookupResponse{}
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convertChildInodeEntry(s.clock, &resp.Entry, fuseResp)
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convertChildInodeEntry(&resp.Entry, fuseResp)
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s.logger.Println("Responding:", fuseResp)
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typed.Respond(fuseResp)
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@ -165,7 +181,7 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
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// Convert the response.
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fuseResp := &bazilfuse.GetattrResponse{
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Attr: convertAttributes(req.Inode, resp.Attributes),
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AttrValid: resp.AttributesExpiration.Sub(s.clock.Now()),
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AttrValid: convertExpirationTime(resp.AttributesExpiration),
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}
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s.logger.Println("Responding:", fuseResp)
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@ -205,7 +221,7 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
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// Convert the response.
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fuseResp := &bazilfuse.SetattrResponse{
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Attr: convertAttributes(req.Inode, resp.Attributes),
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AttrValid: resp.AttributesExpiration.Sub(s.clock.Now()),
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AttrValid: convertExpirationTime(resp.AttributesExpiration),
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}
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s.logger.Println("Responding:", fuseResp)
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@ -230,7 +246,7 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
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// Convert the response.
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fuseResp := &bazilfuse.MkdirResponse{}
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convertChildInodeEntry(s.clock, &resp.Entry, &fuseResp.LookupResponse)
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convertChildInodeEntry(&resp.Entry, &fuseResp.LookupResponse)
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s.logger.Println("Responding:", fuseResp)
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typed.Respond(fuseResp)
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@ -259,7 +275,7 @@ func (s *server) handleFuseRequest(fuseReq bazilfuse.Request) {
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Handle: bazilfuse.HandleID(resp.Handle),
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},
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}
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convertChildInodeEntry(s.clock, &resp.Entry, &fuseResp.LookupResponse)
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convertChildInodeEntry(&resp.Entry, &fuseResp.LookupResponse)
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s.logger.Println("Responding:", fuseResp)
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typed.Respond(fuseResp)
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