Move some system services to separate directories

Refactored the directory structure so that services can be optionally
excluded. This is step 1. Will be followed by another change that makes
it possible to remove services from the build.

Change-Id: Ideacedfd34b5e213217ad3ff4ebb21c4a8e73f85

1 files changed, 323 insertions, 0 deletions

diff --git a/libs/common_time/diag_thread.cpp b/libs/common_time/diag_thread.cpp
new file mode 100644
index 0000000..4cb9551
--- /dev/null
+++ b/libs/common_time/diag_thread.cpp
@@ -0,0 +1,323 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "common_time"
+#include <utils/Log.h>
+
+#include <fcntl.h>
+#include <linux/in.h>
+#include <linux/tcp.h>
+#include <poll.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <utils/Errors.h>
+#include <utils/misc.h>
+
+#include <common_time/local_clock.h>
+
+#include "common_clock.h"
+#include "diag_thread.h"
+
+#define kMaxEvents 16
+#define kListenPort 9876
+
+static bool setNonblocking(int fd) {
+    int flags = fcntl(fd, F_GETFL);
+    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
+        ALOGE("Failed to set socket (%d) to non-blocking mode (errno %d)",
+             fd, errno);
+        return false;
+    }
+
+    return true;
+}
+
+static bool setNodelay(int fd) {
+    int tmp = 1;
+    if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &tmp, sizeof(tmp)) < 0) {
+        ALOGE("Failed to set socket (%d) to no-delay mode (errno %d)",
+             fd, errno);
+        return false;
+    }
+
+    return true;
+}
+
+namespace android {
+
+DiagThread::DiagThread(CommonClock* common_clock, LocalClock* local_clock) {
+    common_clock_ = common_clock;
+    local_clock_ = local_clock;
+    listen_fd_ = -1;
+    data_fd_ = -1;
+    kernel_logID_basis_known_ = false;
+    discipline_log_ID_ = 0;
+}
+
+DiagThread::~DiagThread() {
+}
+
+status_t DiagThread::startWorkThread() {
+    status_t res;
+    stopWorkThread();
+    res = run("Diag");
+
+    if (res != OK)
+        ALOGE("Failed to start work thread (res = %d)", res);
+
+    return res;
+}
+
+void DiagThread::stopWorkThread() {
+    status_t res;
+    res = requestExitAndWait(); // block until thread exit.
+    if (res != OK)
+        ALOGE("Failed to stop work thread (res = %d)", res);
+}
+
+bool DiagThread::openListenSocket() {
+    bool ret = false;
+    int flags;
+    cleanupListenSocket();
+
+    if ((listen_fd_ = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+        ALOGE("Socket failed.");
+        goto bailout;
+    }
+
+    // Set non-blocking operation
+    if (!setNonblocking(listen_fd_))
+        goto bailout;
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = INADDR_ANY;
+    addr.sin_port = htons(kListenPort);
+
+    if (bind(listen_fd_, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+        ALOGE("Bind failed.");
+        goto bailout;
+    }
+
+    if (listen(listen_fd_, 1) < 0) {
+        ALOGE("Listen failed.");
+        goto bailout;
+    }
+
+    ret = true;
+bailout:
+    if (!ret)
+        cleanupListenSocket();
+
+    return ret;
+}
+
+void DiagThread::cleanupListenSocket() {
+    if (listen_fd_ >= 0) {
+        int res;
+
+        struct linger l;
+        l.l_onoff  = 1;
+        l.l_linger = 0;
+
+        setsockopt(listen_fd_, SOL_SOCKET, SO_LINGER, &l, sizeof(l));
+        shutdown(listen_fd_, SHUT_RDWR);
+        close(listen_fd_);
+        listen_fd_ = -1;
+    }
+}
+
+void DiagThread::cleanupDataSocket() {
+    if (data_fd_ >= 0) {
+        int res;
+
+        struct linger l;
+        l.l_onoff  = 1;
+        l.l_linger = 0;
+
+        setsockopt(data_fd_, SOL_SOCKET, SO_LINGER, &l, sizeof(l));
+        shutdown(data_fd_, SHUT_RDWR);
+        close(data_fd_);
+        data_fd_ = -1;
+    }
+}
+
+void DiagThread::resetLogIDs() {
+    // Drain and discard all of the events from the kernel
+    struct local_time_debug_event events[kMaxEvents];
+    while(local_clock_->getDebugLog(events, kMaxEvents) > 0)
+        ;
+
+    {
+        Mutex::Autolock lock(&discipline_log_lock_);
+        discipline_log_.clear();
+        discipline_log_ID_ = 0;
+    }
+
+    kernel_logID_basis_known_ = false;
+}
+
+void DiagThread::pushDisciplineEvent(int64_t observed_local_time,
+                                     int64_t observed_common_time,
+                                     int64_t nominal_common_time,
+                                     int32_t total_correction,
+                                     int32_t rtt) {
+    Mutex::Autolock lock(&discipline_log_lock_);
+
+    DisciplineEventRecord evt;
+
+    evt.event_id = discipline_log_ID_++;
+
+    evt.action_local_time = local_clock_->getLocalTime();
+    common_clock_->localToCommon(evt.action_local_time,
+            &evt.action_common_time);
+
+    evt.observed_local_time  = observed_local_time;
+    evt.observed_common_time = observed_common_time;
+    evt.nominal_common_time  = nominal_common_time;
+    evt.total_correction     = total_correction;
+    evt.rtt                  = rtt;
+
+    discipline_log_.push_back(evt);
+    while (discipline_log_.size() > kMaxDisciplineLogSize)
+        discipline_log_.erase(discipline_log_.begin());
+}
+
+bool DiagThread::threadLoop() {
+    struct pollfd poll_fds[1];
+
+    if (!openListenSocket()) {
+        ALOGE("Failed to open listen socket");
+        goto bailout;
+    }
+
+    while (!exitPending()) {
+        memset(&poll_fds, 0, sizeof(poll_fds));
+
+        if (data_fd_ < 0) {
+            poll_fds[0].fd     = listen_fd_;
+            poll_fds[0].events = POLLIN;
+        } else {
+            poll_fds[0].fd     = data_fd_;
+            poll_fds[0].events = POLLRDHUP | POLLIN;
+        }
+
+        int poll_res = poll(poll_fds, NELEM(poll_fds), 50);
+        if (poll_res < 0) {
+            ALOGE("Fatal error (%d,%d) while waiting on events",
+                 poll_res, errno);
+            goto bailout;
+        }
+
+        if (exitPending())
+            break;
+
+        if (poll_fds[0].revents) {
+            if (poll_fds[0].fd == listen_fd_) {
+                data_fd_ = accept(listen_fd_, NULL, NULL);
+
+                if (data_fd_ < 0) {
+                    ALOGW("Failed accept on socket %d with err %d",
+                         listen_fd_, errno);
+                } else {
+                    if (!setNonblocking(data_fd_))
+                        cleanupDataSocket();
+                    if (!setNodelay(data_fd_))
+                        cleanupDataSocket();
+                }
+            } else
+                if (poll_fds[0].fd == data_fd_) {
+                    if (poll_fds[0].revents & POLLRDHUP) {
+                        // Connection hung up; time to clean up.
+                        cleanupDataSocket();
+                    } else
+                        if (poll_fds[0].revents & POLLIN) {
+                            uint8_t cmd;
+                            if (read(data_fd_, &cmd, sizeof(cmd)) > 0) {
+                                switch(cmd) {
+                                    case 'r':
+                                    case 'R':
+                                        resetLogIDs();
+                                        break;
+                                }
+                            }
+                        }
+                }
+        }
+
+        struct local_time_debug_event events[kMaxEvents];
+        int amt = local_clock_->getDebugLog(events, kMaxEvents);
+
+        if (amt > 0) {
+            for (int i = 0; i < amt; i++) {
+                struct local_time_debug_event& e = events[i];
+
+                if (!kernel_logID_basis_known_) {
+                    kernel_logID_basis_ = e.local_timesync_event_id;
+                    kernel_logID_basis_known_ = true;
+                }
+
+                char buf[1024];
+                int64_t common_time;
+                status_t res = common_clock_->localToCommon(e.local_time,
+                                                            &common_time);
+                snprintf(buf, sizeof(buf), "E,%lld,%lld,%lld,%d\n",
+                         e.local_timesync_event_id - kernel_logID_basis_,
+                         e.local_time,
+                         common_time,
+                         (OK == res) ? 1 : 0);
+                buf[sizeof(buf) - 1] = 0;
+
+                if (data_fd_ >= 0)
+                    write(data_fd_, buf, strlen(buf));
+            }
+        }
+
+        { // scope for autolock pattern
+            Mutex::Autolock lock(&discipline_log_lock_);
+
+            while (discipline_log_.size() > 0) {
+                char buf[1024];
+                DisciplineEventRecord& e = *discipline_log_.begin();
+                snprintf(buf, sizeof(buf),
+                         "D,%lld,%lld,%lld,%lld,%lld,%lld,%d,%d\n",
+                         e.event_id,
+                         e.action_local_time,
+                         e.action_common_time,
+                         e.observed_local_time,
+                         e.observed_common_time,
+                         e.nominal_common_time,
+                         e.total_correction,
+                         e.rtt);
+                buf[sizeof(buf) - 1] = 0;
+
+                if (data_fd_ >= 0)
+                    write(data_fd_, buf, strlen(buf));
+
+                discipline_log_.erase(discipline_log_.begin());
+            }
+        }
+    }
+
+bailout:
+    cleanupDataSocket();
+    cleanupListenSocket();
+    return false;
+}
+
+}  // namespace android