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-rw-r--r--src/event/Loop.cxx3
-rw-r--r--src/lib/nfs/Blocking.cxx7
-rw-r--r--src/lib/nfs/Blocking.hxx9
-rw-r--r--src/lib/nfs/Cancellable.hxx6
-rw-r--r--src/lib/nfs/Connection.cxx149
-rw-r--r--src/lib/nfs/Connection.hxx33
-rw-r--r--src/storage/plugins/NfsStorage.cxx1
7 files changed, 183 insertions, 25 deletions
diff --git a/src/event/Loop.cxx b/src/event/Loop.cxx
index 4ded68ff4..1bac7c551 100644
--- a/src/event/Loop.cxx
+++ b/src/event/Loop.cxx
@@ -179,9 +179,10 @@ EventLoop::Run()
mutex.lock();
HandleDeferred();
busy = false;
+ const bool _again = again;
mutex.unlock();
- if (again)
+ if (_again)
/* re-evaluate timers because one of the
IdleMonitors may have added a new
timeout */
diff --git a/src/lib/nfs/Blocking.cxx b/src/lib/nfs/Blocking.cxx
index 5f769c408..58eaf6af2 100644
--- a/src/lib/nfs/Blocking.cxx
+++ b/src/lib/nfs/Blocking.cxx
@@ -20,7 +20,9 @@
#include "config.h"
#include "Blocking.hxx"
#include "Connection.hxx"
+#include "Domain.hxx"
#include "event/Call.hxx"
+#include "util/Error.hxx"
bool
BlockingNfsOperation::Run(Error &_error)
@@ -31,7 +33,10 @@ BlockingNfsOperation::Run(Error &_error)
[this](){ connection.AddLease(*this); });
/* wait for completion */
- LockWaitFinished();
+ if (!LockWaitFinished()) {
+ _error.Set(nfs_domain, 0, "Timeout");
+ return false;
+ }
/* check for error */
if (error.IsDefined()) {
diff --git a/src/lib/nfs/Blocking.hxx b/src/lib/nfs/Blocking.hxx
index f8354822d..eb16dfb8c 100644
--- a/src/lib/nfs/Blocking.hxx
+++ b/src/lib/nfs/Blocking.hxx
@@ -35,6 +35,8 @@ class NfsConnection;
* thread, and method Run() waits for completion.
*/
class BlockingNfsOperation : protected NfsCallback, NfsLease {
+ static constexpr unsigned timeout_ms = 60000;
+
Mutex mutex;
Cond cond;
@@ -52,10 +54,13 @@ public:
bool Run(Error &error);
private:
- void LockWaitFinished() {
+ bool LockWaitFinished() {
const ScopeLock protect(mutex);
while (!finished)
- cond.wait(mutex);
+ if (!cond.timed_wait(mutex, timeout_ms))
+ return false;
+
+ return true;
}
/**
diff --git a/src/lib/nfs/Cancellable.hxx b/src/lib/nfs/Cancellable.hxx
index be4527ac3..151be0528 100644
--- a/src/lib/nfs/Cancellable.hxx
+++ b/src/lib/nfs/Cancellable.hxx
@@ -157,6 +157,12 @@ public:
return *i;
}
+
+ template<typename F>
+ void ForEach(F &&f) {
+ for (CT &i : list)
+ f(i);
+ }
};
#endif
diff --git a/src/lib/nfs/Connection.cxx b/src/lib/nfs/Connection.cxx
index 06d2a4d2a..6e9f77345 100644
--- a/src/lib/nfs/Connection.cxx
+++ b/src/lib/nfs/Connection.cxx
@@ -34,11 +34,15 @@ extern "C" {
#include <poll.h> /* for POLLIN, POLLOUT */
+static constexpr unsigned NFS_MOUNT_TIMEOUT = 60;
+
inline bool
NfsConnection::CancellableCallback::Stat(nfs_context *ctx,
const char *path,
Error &error)
{
+ assert(connection.GetEventLoop().IsInside());
+
int result = nfs_stat_async(ctx, path, Callback, this);
if (result < 0) {
error.Format(nfs_domain, "nfs_stat_async() failed: %s",
@@ -54,6 +58,8 @@ NfsConnection::CancellableCallback::OpenDirectory(nfs_context *ctx,
const char *path,
Error &error)
{
+ assert(connection.GetEventLoop().IsInside());
+
int result = nfs_opendir_async(ctx, path, Callback, this);
if (result < 0) {
error.Format(nfs_domain, "nfs_opendir_async() failed: %s",
@@ -69,6 +75,8 @@ NfsConnection::CancellableCallback::Open(nfs_context *ctx,
const char *path, int flags,
Error &error)
{
+ assert(connection.GetEventLoop().IsInside());
+
int result = nfs_open_async(ctx, path, flags,
Callback, this);
if (result < 0) {
@@ -85,6 +93,8 @@ NfsConnection::CancellableCallback::Stat(nfs_context *ctx,
struct nfsfh *fh,
Error &error)
{
+ assert(connection.GetEventLoop().IsInside());
+
int result = nfs_fstat_async(ctx, fh, Callback, this);
if (result < 0) {
error.Format(nfs_domain, "nfs_fstat_async() failed: %s",
@@ -100,6 +110,8 @@ NfsConnection::CancellableCallback::Read(nfs_context *ctx, struct nfsfh *fh,
uint64_t offset, size_t size,
Error &error)
{
+ assert(connection.GetEventLoop().IsInside());
+
int result = nfs_pread_async(ctx, fh, offset, size, Callback, this);
if (result < 0) {
error.Format(nfs_domain, "nfs_pread_async() failed: %s",
@@ -113,6 +125,7 @@ NfsConnection::CancellableCallback::Read(nfs_context *ctx, struct nfsfh *fh,
inline void
NfsConnection::CancellableCallback::CancelAndScheduleClose(struct nfsfh *fh)
{
+ assert(connection.GetEventLoop().IsInside());
assert(!open);
assert(close_fh == nullptr);
assert(fh != nullptr);
@@ -122,8 +135,21 @@ NfsConnection::CancellableCallback::CancelAndScheduleClose(struct nfsfh *fh)
}
inline void
+NfsConnection::CancellableCallback::PrepareDestroyContext()
+{
+ assert(IsCancelled());
+
+ if (close_fh != nullptr) {
+ connection.InternalClose(close_fh);
+ close_fh = nullptr;
+ }
+}
+
+inline void
NfsConnection::CancellableCallback::Callback(int err, void *data)
{
+ assert(connection.GetEventLoop().IsInside());
+
if (!IsCancelled()) {
assert(close_fh == nullptr);
@@ -143,8 +169,10 @@ NfsConnection::CancellableCallback::Callback(int err, void *data)
allocated file handle immediately */
assert(close_fh == nullptr);
- struct nfsfh *fh = (struct nfsfh *)data;
- connection.Close(fh);
+ if (err >= 0) {
+ struct nfsfh *fh = (struct nfsfh *)data;
+ connection.Close(fh);
+ }
} else if (close_fh != nullptr)
connection.DeferClose(close_fh);
@@ -209,6 +237,7 @@ NfsConnection::RemoveLease(NfsLease &lease)
bool
NfsConnection::Stat(const char *path, NfsCallback &callback, Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(!callbacks.Contains(callback));
auto &c = callbacks.Add(callback, *this, false);
@@ -225,6 +254,7 @@ bool
NfsConnection::OpenDirectory(const char *path, NfsCallback &callback,
Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(!callbacks.Contains(callback));
auto &c = callbacks.Add(callback, *this, true);
@@ -240,12 +270,16 @@ NfsConnection::OpenDirectory(const char *path, NfsCallback &callback,
const struct nfsdirent *
NfsConnection::ReadDirectory(struct nfsdir *dir)
{
+ assert(GetEventLoop().IsInside());
+
return nfs_readdir(context, dir);
}
void
NfsConnection::CloseDirectory(struct nfsdir *dir)
{
+ assert(GetEventLoop().IsInside());
+
return nfs_closedir(context, dir);
}
@@ -253,6 +287,7 @@ bool
NfsConnection::Open(const char *path, int flags, NfsCallback &callback,
Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(!callbacks.Contains(callback));
auto &c = callbacks.Add(callback, *this, true);
@@ -268,6 +303,7 @@ NfsConnection::Open(const char *path, int flags, NfsCallback &callback,
bool
NfsConnection::Stat(struct nfsfh *fh, NfsCallback &callback, Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(!callbacks.Contains(callback));
auto &c = callbacks.Add(callback, *this, false);
@@ -284,6 +320,7 @@ bool
NfsConnection::Read(struct nfsfh *fh, uint64_t offset, size_t size,
NfsCallback &callback, Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(!callbacks.Contains(callback));
auto &c = callbacks.Add(callback, *this, false);
@@ -307,10 +344,22 @@ DummyCallback(int, struct nfs_context *, void *, void *)
{
}
+inline void
+NfsConnection::InternalClose(struct nfsfh *fh)
+{
+ assert(GetEventLoop().IsInside());
+ assert(context != nullptr);
+ assert(fh != nullptr);
+
+ nfs_close_async(context, fh, DummyCallback, nullptr);
+}
+
void
NfsConnection::Close(struct nfsfh *fh)
{
- nfs_close_async(context, fh, DummyCallback, nullptr);
+ assert(GetEventLoop().IsInside());
+
+ InternalClose(fh);
ScheduleSocket();
}
@@ -327,12 +376,26 @@ NfsConnection::DestroyContext()
assert(GetEventLoop().IsInside());
assert(context != nullptr);
+#ifndef NDEBUG
+ assert(!in_destroy);
+ in_destroy = true;
+#endif
+
+ if (!mount_finished) {
+ assert(TimeoutMonitor::IsActive());
+ TimeoutMonitor::Cancel();
+ }
+
/* cancel pending DeferredMonitor that was scheduled to notify
new leases */
DeferredMonitor::Cancel();
if (SocketMonitor::IsDefined())
- SocketMonitor::Cancel();
+ SocketMonitor::Steal();
+
+ callbacks.ForEach([](CancellableCallback &c){
+ c.PrepareDestroyContext();
+ });
nfs_destroy_context(context);
context = nullptr;
@@ -341,8 +404,11 @@ NfsConnection::DestroyContext()
inline void
NfsConnection::DeferClose(struct nfsfh *fh)
{
+ assert(GetEventLoop().IsInside());
assert(in_event);
assert(in_service);
+ assert(context != nullptr);
+ assert(fh != nullptr);
deferred_close.push_front(fh);
}
@@ -350,6 +416,7 @@ NfsConnection::DeferClose(struct nfsfh *fh)
void
NfsConnection::ScheduleSocket()
{
+ assert(GetEventLoop().IsInside());
assert(context != nullptr);
if (!SocketMonitor::IsDefined()) {
@@ -364,9 +431,35 @@ NfsConnection::ScheduleSocket()
SocketMonitor::Schedule(libnfs_to_events(nfs_which_events(context)));
}
+inline int
+NfsConnection::Service(unsigned flags)
+{
+ assert(GetEventLoop().IsInside());
+ assert(context != nullptr);
+
+#ifndef NDEBUG
+ assert(!in_event);
+ in_event = true;
+
+ assert(!in_service);
+ in_service = true;
+#endif
+
+ int result = nfs_service(context, events_to_libnfs(flags));
+
+#ifndef NDEBUG
+ assert(context != nullptr);
+ assert(in_service);
+ in_service = false;
+#endif
+
+ return result;
+}
+
bool
NfsConnection::OnSocketReady(unsigned flags)
{
+ assert(GetEventLoop().IsInside());
assert(deferred_close.empty());
bool closed = false;
@@ -378,21 +471,10 @@ NfsConnection::OnSocketReady(unsigned flags)
re-register it each time */
SocketMonitor::Steal();
- assert(!in_event);
- in_event = true;
-
- assert(!in_service);
- in_service = true;
-
- int result = nfs_service(context, events_to_libnfs(flags));
-
- assert(context != nullptr);
- assert(in_service);
- in_service = false;
+ const int result = Service(flags);
while (!deferred_close.empty()) {
- nfs_close_async(context, deferred_close.front(),
- DummyCallback, nullptr);
+ InternalClose(deferred_close.front());
deferred_close.pop_front();
}
@@ -413,9 +495,9 @@ NfsConnection::OnSocketReady(unsigned flags)
DestroyContext();
closed = true;
- } else if (SocketMonitor::IsDefined() && nfs_get_fd(context) < 0) {
+ } else if (nfs_get_fd(context) < 0) {
/* this happens when rpc_reconnect_requeue() is called
- after the connection broke, but autoreconnet was
+ after the connection broke, but autoreconnect was
disabled - nfs_service() returns 0 */
Error error;
const char *msg = nfs_get_error(context);
@@ -431,8 +513,12 @@ NfsConnection::OnSocketReady(unsigned flags)
closed = true;
}
+ assert(context == nullptr || nfs_get_fd(context) >= 0);
+
+#ifndef NDEBUG
assert(in_event);
in_event = false;
+#endif
if (context != nullptr)
ScheduleSocket();
@@ -444,10 +530,14 @@ inline void
NfsConnection::MountCallback(int status, gcc_unused nfs_context *nfs,
gcc_unused void *data)
{
+ assert(GetEventLoop().IsInside());
assert(context == nfs);
mount_finished = true;
+ assert(TimeoutMonitor::IsActive() || in_destroy);
+ TimeoutMonitor::Cancel();
+
if (status < 0) {
postponed_mount_error.Format(nfs_domain, status,
"nfs_mount_async() failed: %s",
@@ -468,6 +558,7 @@ NfsConnection::MountCallback(int status, nfs_context *nfs, void *data,
inline bool
NfsConnection::MountInternal(Error &error)
{
+ assert(GetEventLoop().IsInside());
assert(context == nullptr);
context = nfs_init_context();
@@ -478,8 +569,14 @@ NfsConnection::MountInternal(Error &error)
postponed_mount_error.Clear();
mount_finished = false;
+
+ TimeoutMonitor::ScheduleSeconds(NFS_MOUNT_TIMEOUT);
+
+#ifndef NDEBUG
in_service = false;
in_event = false;
+ in_destroy = false;
+#endif
if (nfs_mount_async(context, server.c_str(), export_name.c_str(),
MountCallback, this) != 0) {
@@ -536,8 +633,22 @@ NfsConnection::BroadcastError(Error &&error)
}
void
+NfsConnection::OnTimeout()
+{
+ assert(GetEventLoop().IsInside());
+ assert(!mount_finished);
+
+ mount_finished = true;
+ DestroyContext();
+
+ BroadcastMountError(Error(nfs_domain, "Mount timeout"));
+}
+
+void
NfsConnection::RunDeferred()
{
+ assert(GetEventLoop().IsInside());
+
if (context == nullptr) {
Error error;
if (!MountInternal(error)) {
diff --git a/src/lib/nfs/Connection.hxx b/src/lib/nfs/Connection.hxx
index aebafd4d3..3969a7e8f 100644
--- a/src/lib/nfs/Connection.hxx
+++ b/src/lib/nfs/Connection.hxx
@@ -23,6 +23,7 @@
#include "Lease.hxx"
#include "Cancellable.hxx"
#include "event/SocketMonitor.hxx"
+#include "event/TimeoutMonitor.hxx"
#include "event/DeferredMonitor.hxx"
#include "util/Error.hxx"
@@ -40,7 +41,7 @@ class NfsCallback;
/**
* An asynchronous connection to a NFS server.
*/
-class NfsConnection : SocketMonitor, DeferredMonitor {
+class NfsConnection : SocketMonitor, TimeoutMonitor, DeferredMonitor {
class CancellableCallback : public CancellablePointer<NfsCallback> {
NfsConnection &connection;
@@ -84,6 +85,13 @@ class NfsConnection : SocketMonitor, DeferredMonitor {
*/
void CancelAndScheduleClose(struct nfsfh *fh);
+ /**
+ * Called by NfsConnection::DestroyContext() right
+ * before nfs_destroy_context(). This object is given
+ * a chance to prepare for the latter.
+ */
+ void PrepareDestroyContext();
+
private:
static void Callback(int err, struct nfs_context *nfs,
void *data, void *private_data);
@@ -111,6 +119,7 @@ class NfsConnection : SocketMonitor, DeferredMonitor {
Error postponed_mount_error;
+#ifndef NDEBUG
/**
* True when nfs_service() is being called.
*/
@@ -122,13 +131,20 @@ class NfsConnection : SocketMonitor, DeferredMonitor {
*/
bool in_event;
+ /**
+ * True when DestroyContext() is being called.
+ */
+ bool in_destroy;
+#endif
+
bool mount_finished;
public:
gcc_nonnull_all
NfsConnection(EventLoop &_loop,
const char *_server, const char *_export_name)
- :SocketMonitor(_loop), DeferredMonitor(_loop),
+ :SocketMonitor(_loop), TimeoutMonitor(_loop),
+ DeferredMonitor(_loop),
server(_server), export_name(_export_name),
context(nullptr) {}
@@ -185,6 +201,11 @@ private:
void DestroyContext();
/**
+ * Wrapper for nfs_close_async().
+ */
+ void InternalClose(struct nfsfh *fh);
+
+ /**
* Invoke nfs_close_async() after nfs_service() returns.
*/
void DeferClose(struct nfsfh *fh);
@@ -200,9 +221,17 @@ private:
void ScheduleSocket();
+ /**
+ * Wrapper for nfs_service().
+ */
+ int Service(unsigned flags);
+
/* virtual methods from SocketMonitor */
virtual bool OnSocketReady(unsigned flags) override;
+ /* virtual methods from TimeoutMonitor */
+ void OnTimeout() final;
+
/* virtual methods from DeferredMonitor */
virtual void RunDeferred() override;
};
diff --git a/src/storage/plugins/NfsStorage.cxx b/src/storage/plugins/NfsStorage.cxx
index 8ddb14250..823d662c5 100644
--- a/src/storage/plugins/NfsStorage.cxx
+++ b/src/storage/plugins/NfsStorage.cxx
@@ -146,6 +146,7 @@ private:
const ScopeLock protect(mutex);
state = _state;
+ last_error.Clear();
last_error.Set(error);
cond.broadcast();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 14:11:33 +0000