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-rw-r--r--pkg/sentry/fs/fdpipe/pipe.go3
-rw-r--r--pkg/sentry/fs/host/inode.go2
-rw-r--r--pkg/sentry/fs/inotify.go2
-rw-r--r--pkg/sentry/fs/lock/lock.go2
-rw-r--r--pkg/sentry/fs/timerfd/timerfd.go2
-rw-r--r--pkg/sentry/fs/tty/line_discipline.go4
-rw-r--r--pkg/sentry/kernel/BUILD1
-rw-r--r--pkg/sentry/kernel/epoll/epoll.go15
-rw-r--r--pkg/sentry/kernel/epoll/epoll_state.go2
-rw-r--r--pkg/sentry/kernel/eventfd/eventfd.go2
-rw-r--r--pkg/sentry/kernel/kernel.go32
-rw-r--r--pkg/sentry/kernel/pipe/pipe.go2
-rw-r--r--pkg/sentry/kernel/task.go2
-rw-r--r--pkg/sentry/kernel/threads.go6
14 files changed, 14 insertions, 63 deletions
diff --git a/pkg/sentry/fs/fdpipe/pipe.go b/pkg/sentry/fs/fdpipe/pipe.go
index 4370cce33..d2eb03bb7 100644
--- a/pkg/sentry/fs/fdpipe/pipe.go
+++ b/pkg/sentry/fs/fdpipe/pipe.go
@@ -45,7 +45,8 @@ type pipeOperations struct {
fsutil.FileNoIoctl `state:"nosave"`
fsutil.FileNoSplice `state:"nosave"`
fsutil.FileUseInodeUnstableAttr `state:"nosave"`
- waiter.Queue `state:"nosave"`
+
+ waiter.Queue
// flags are the flags used to open the pipe.
flags fs.FileFlags `state:".(fs.FileFlags)"`
diff --git a/pkg/sentry/fs/host/inode.go b/pkg/sentry/fs/host/inode.go
index 92d58e3e9..99c37291e 100644
--- a/pkg/sentry/fs/host/inode.go
+++ b/pkg/sentry/fs/host/inode.go
@@ -70,7 +70,7 @@ type inodeFileState struct {
descriptor *descriptor `state:"wait"`
// Event queue for blocking operations.
- queue waiter.Queue `state:"zerovalue"`
+ queue waiter.Queue
// sattr is used to restore the inodeOperations.
sattr fs.StableAttr `state:"wait"`
diff --git a/pkg/sentry/fs/inotify.go b/pkg/sentry/fs/inotify.go
index 51cd6cd37..941f37116 100644
--- a/pkg/sentry/fs/inotify.go
+++ b/pkg/sentry/fs/inotify.go
@@ -43,7 +43,7 @@ type Inotify struct {
// user, since we may aggressively reuse an id on S/R.
id uint64
- waiter.Queue `state:"nosave"`
+ waiter.Queue
// evMu *only* protects the events list. We need a separate lock because
// while queuing events, a watch needs to lock the event queue, and using mu
diff --git a/pkg/sentry/fs/lock/lock.go b/pkg/sentry/fs/lock/lock.go
index 7d7a207cc..e39d340fe 100644
--- a/pkg/sentry/fs/lock/lock.go
+++ b/pkg/sentry/fs/lock/lock.go
@@ -132,7 +132,7 @@ type Locks struct {
locks LockSet
// blockedQueue is the queue of waiters that are waiting on a lock.
- blockedQueue waiter.Queue `state:"zerovalue"`
+ blockedQueue waiter.Queue
}
// Blocker is the interface used for blocking locks. Passing a nil Blocker
diff --git a/pkg/sentry/fs/timerfd/timerfd.go b/pkg/sentry/fs/timerfd/timerfd.go
index 1c8518d71..ca8be8683 100644
--- a/pkg/sentry/fs/timerfd/timerfd.go
+++ b/pkg/sentry/fs/timerfd/timerfd.go
@@ -43,7 +43,7 @@ type TimerOperations struct {
fsutil.FileNoopFlush `state:"nosave"`
fsutil.FileUseInodeUnstableAttr `state:"nosave"`
- events waiter.Queue `state:"zerovalue"`
+ events waiter.Queue
timer *ktime.Timer
// val is the number of timer expirations since the last successful call to
diff --git a/pkg/sentry/fs/tty/line_discipline.go b/pkg/sentry/fs/tty/line_discipline.go
index f9fca6d8e..f2c9e9668 100644
--- a/pkg/sentry/fs/tty/line_discipline.go
+++ b/pkg/sentry/fs/tty/line_discipline.go
@@ -102,10 +102,10 @@ type lineDiscipline struct {
column int
// masterWaiter is used to wait on the master end of the TTY.
- masterWaiter waiter.Queue `state:"zerovalue"`
+ masterWaiter waiter.Queue
// replicaWaiter is used to wait on the replica end of the TTY.
- replicaWaiter waiter.Queue `state:"zerovalue"`
+ replicaWaiter waiter.Queue
}
func newLineDiscipline(termios linux.KernelTermios) *lineDiscipline {
diff --git a/pkg/sentry/kernel/BUILD b/pkg/sentry/kernel/BUILD
index c0f13bf52..53a21e1e2 100644
--- a/pkg/sentry/kernel/BUILD
+++ b/pkg/sentry/kernel/BUILD
@@ -255,7 +255,6 @@ go_library(
"//pkg/sentry/hostcpu",
"//pkg/sentry/inet",
"//pkg/sentry/kernel/auth",
- "//pkg/sentry/kernel/epoll",
"//pkg/sentry/kernel/futex",
"//pkg/sentry/kernel/msgqueue",
"//pkg/sentry/kernel/sched",
diff --git a/pkg/sentry/kernel/epoll/epoll.go b/pkg/sentry/kernel/epoll/epoll.go
index 6006c46a9..8d0a21baf 100644
--- a/pkg/sentry/kernel/epoll/epoll.go
+++ b/pkg/sentry/kernel/epoll/epoll.go
@@ -66,7 +66,7 @@ type pollEntry struct {
file *refs.WeakRef `state:"manual"`
id FileIdentifier `state:"wait"`
userData [2]int32
- waiter waiter.Entry `state:"manual"`
+ waiter waiter.Entry
mask waiter.EventMask
flags EntryFlags
@@ -102,7 +102,7 @@ type EventPoll struct {
// Wait queue is used to notify interested parties when the event poll
// object itself becomes readable or writable.
- waiter.Queue `state:"zerovalue"`
+ waiter.Queue
// files is the map of all the files currently being observed, it is
// protected by mu.
@@ -454,14 +454,3 @@ func (e *EventPoll) RemoveEntry(ctx context.Context, id FileIdentifier) error {
return nil
}
-
-// UnregisterEpollWaiters removes the epoll waiter objects from the waiting
-// queues. This is different from Release() as the file is not dereferenced.
-func (e *EventPoll) UnregisterEpollWaiters() {
- e.mu.Lock()
- defer e.mu.Unlock()
-
- for _, entry := range e.files {
- entry.id.File.EventUnregister(&entry.waiter)
- }
-}
diff --git a/pkg/sentry/kernel/epoll/epoll_state.go b/pkg/sentry/kernel/epoll/epoll_state.go
index e08d6287f..135a6d72c 100644
--- a/pkg/sentry/kernel/epoll/epoll_state.go
+++ b/pkg/sentry/kernel/epoll/epoll_state.go
@@ -21,9 +21,7 @@ import (
// afterLoad is invoked by stateify.
func (p *pollEntry) afterLoad() {
- p.waiter.Callback = p
p.file = refs.NewWeakRef(p.id.File, p)
- p.id.File.EventRegister(&p.waiter, p.mask)
}
// afterLoad is invoked by stateify.
diff --git a/pkg/sentry/kernel/eventfd/eventfd.go b/pkg/sentry/kernel/eventfd/eventfd.go
index 5ea44a2c2..bf625dede 100644
--- a/pkg/sentry/kernel/eventfd/eventfd.go
+++ b/pkg/sentry/kernel/eventfd/eventfd.go
@@ -54,7 +54,7 @@ type EventOperations struct {
// Queue is used to notify interested parties when the event object
// becomes readable or writable.
- wq waiter.Queue `state:"zerovalue"`
+ wq waiter.Queue
// val is the current value of the event counter.
val uint64
diff --git a/pkg/sentry/kernel/kernel.go b/pkg/sentry/kernel/kernel.go
index f913d25db..5dc821a48 100644
--- a/pkg/sentry/kernel/kernel.go
+++ b/pkg/sentry/kernel/kernel.go
@@ -57,7 +57,6 @@ import (
"gvisor.dev/gvisor/pkg/sentry/hostcpu"
"gvisor.dev/gvisor/pkg/sentry/inet"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
- "gvisor.dev/gvisor/pkg/sentry/kernel/epoll"
"gvisor.dev/gvisor/pkg/sentry/kernel/futex"
"gvisor.dev/gvisor/pkg/sentry/kernel/sched"
ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
@@ -486,11 +485,6 @@ func (k *Kernel) SaveTo(ctx context.Context, w wire.Writer) error {
return err
}
- // Remove all epoll waiter objects from underlying wait queues.
- // NOTE: for programs to resume execution in future snapshot scenarios,
- // we will need to re-establish these waiter objects after saving.
- k.tasks.unregisterEpollWaiters(ctx)
-
// Clear the dirent cache before saving because Dirents must be Loaded in a
// particular order (parents before children), and Loading dirents from a cache
// breaks that order.
@@ -623,32 +617,6 @@ func (k *Kernel) flushWritesToFiles(ctx context.Context) error {
})
}
-// Preconditions: !VFS2Enabled.
-func (ts *TaskSet) unregisterEpollWaiters(ctx context.Context) {
- ts.mu.RLock()
- defer ts.mu.RUnlock()
-
- // Tasks that belong to the same process could potentially point to the
- // same FDTable. So we retain a map of processed ones to avoid
- // processing the same FDTable multiple times.
- processed := make(map[*FDTable]struct{})
- for t := range ts.Root.tids {
- // We can skip locking Task.mu here since the kernel is paused.
- if t.fdTable == nil {
- continue
- }
- if _, ok := processed[t.fdTable]; ok {
- continue
- }
- t.fdTable.forEach(ctx, func(_ int32, file *fs.File, _ *vfs.FileDescription, _ FDFlags) {
- if e, ok := file.FileOperations.(*epoll.EventPoll); ok {
- e.UnregisterEpollWaiters()
- }
- })
- processed[t.fdTable] = struct{}{}
- }
-}
-
// Preconditions: The kernel must be paused.
func (k *Kernel) invalidateUnsavableMappings(ctx context.Context) error {
invalidated := make(map[*mm.MemoryManager]struct{})
diff --git a/pkg/sentry/kernel/pipe/pipe.go b/pkg/sentry/kernel/pipe/pipe.go
index 86beee6fe..8345473f3 100644
--- a/pkg/sentry/kernel/pipe/pipe.go
+++ b/pkg/sentry/kernel/pipe/pipe.go
@@ -55,7 +55,7 @@ const (
//
// +stateify savable
type Pipe struct {
- waiter.Queue `state:"nosave"`
+ waiter.Queue
// isNamed indicates whether this is a named pipe.
//
diff --git a/pkg/sentry/kernel/task.go b/pkg/sentry/kernel/task.go
index b0004482c..1ea3c1bf7 100644
--- a/pkg/sentry/kernel/task.go
+++ b/pkg/sentry/kernel/task.go
@@ -158,7 +158,7 @@ type Task struct {
// signalQueue is protected by the signalMutex. Note that the task does
// not implement all queue methods, specifically the readiness checks.
// The task only broadcast a notification on signal delivery.
- signalQueue waiter.Queue `state:"zerovalue"`
+ signalQueue waiter.Queue
// If groupStopPending is true, the task should participate in a group
// stop in the interrupt path.
diff --git a/pkg/sentry/kernel/threads.go b/pkg/sentry/kernel/threads.go
index 77ad62445..e38b723ce 100644
--- a/pkg/sentry/kernel/threads.go
+++ b/pkg/sentry/kernel/threads.go
@@ -324,11 +324,7 @@ type threadGroupNode struct {
// eventQueue is notified whenever a event of interest to Task.Wait occurs
// in a child of this thread group, or a ptrace tracee of a task in this
// thread group. Events are defined in task_exit.go.
- //
- // Note that we cannot check and save this wait queue similarly to other
- // wait queues, as the queue will not be empty by the time of saving, due
- // to the wait sourced from Exec().
- eventQueue waiter.Queue `state:"nosave"`
+ eventQueue waiter.Queue
// leader is the thread group's leader, which is the oldest task in the
// thread group; usually the last task in the thread group to call
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 08:43:26 +0000