Staging: android: add binder driver
authorArve Hjønnevåg <arve@android.com>
Sat, 20 Dec 2008 01:40:44 +0000 (17:40 -0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 6 Jan 2009 21:52:41 +0000 (13:52 -0800)
It builds, but not as a module, and with lots of warnings.

I also had to fix up a few syntax errors to get it to build
properly, I'm doubting that anyone has built it in a while :(

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Brian Swetland <swetland@google.com>
Cc: Robert Love <rlove@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/android/Kconfig
drivers/staging/android/Makefile
drivers/staging/android/binder.c [new file with mode: 0644]
drivers/staging/android/binder.h [new file with mode: 0644]

index 229f8d7439ba227b814d466e66378cf7b73cd250..439a9fd81658753589819c4ee7e4344c9bfd82dc 100644 (file)
@@ -6,4 +6,8 @@ config ANDROID
        ---help---
          Enable support for various drivers needed on the Android platform
 
+config ANDROID_BINDER_IPC
+       tristate "Android Binder IPC Driver"
+       default y
+
 endmenu
index a551e53173760ac9e0001bab1bfd438472303222..57efdce57c04b81dfe29296670da92851b1191a7 100644 (file)
@@ -1 +1,2 @@
 obj-$(CONFIG_ANDROID)                  += android.o
+obj-$(CONFIG_ANDROID_BINDER_IPC)       += binder.o
diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
new file mode 100644 (file)
index 0000000..387625b
--- /dev/null
@@ -0,0 +1,3499 @@
+/* binder.c
+ *
+ * Android IPC Subsystem
+ *
+ * Copyright (C) 2007-2008 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/fdtable.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nsproxy.h>
+#include <linux/poll.h>
+#include <linux/proc_fs.h>
+#include <linux/rbtree.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include "binder.h"
+
+static DEFINE_MUTEX(binder_lock);
+static HLIST_HEAD(binder_procs);
+static struct binder_node *binder_context_mgr_node;
+static uid_t binder_context_mgr_uid = -1;
+static int binder_last_id;
+static struct proc_dir_entry *binder_proc_dir_entry_root;
+static struct proc_dir_entry *binder_proc_dir_entry_proc;
+static struct hlist_head binder_dead_nodes;
+
+static int binder_read_proc_proc(
+       char *page, char **start, off_t off, int count, int *eof, void *data);
+
+/* This is only defined in include/asm-arm/sizes.h */
+#ifndef SZ_1K
+#define SZ_1K                               0x400
+#endif
+
+#ifndef SZ_4M
+#define SZ_4M                               0x400000
+#endif
+
+#ifndef __i386__
+#define FORBIDDEN_MMAP_FLAGS                (VM_WRITE | VM_EXEC)
+#else
+#define FORBIDDEN_MMAP_FLAGS                (VM_WRITE)
+#endif
+
+#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
+
+enum {
+       BINDER_DEBUG_USER_ERROR             = 1U << 0,
+       BINDER_DEBUG_FAILED_TRANSACTION     = 1U << 1,
+       BINDER_DEBUG_DEAD_TRANSACTION       = 1U << 2,
+       BINDER_DEBUG_OPEN_CLOSE             = 1U << 3,
+       BINDER_DEBUG_DEAD_BINDER            = 1U << 4,
+       BINDER_DEBUG_DEATH_NOTIFICATION     = 1U << 5,
+       BINDER_DEBUG_READ_WRITE             = 1U << 6,
+       BINDER_DEBUG_USER_REFS              = 1U << 7,
+       BINDER_DEBUG_THREADS                = 1U << 8,
+       BINDER_DEBUG_TRANSACTION            = 1U << 9,
+       BINDER_DEBUG_TRANSACTION_COMPLETE   = 1U << 10,
+       BINDER_DEBUG_FREE_BUFFER            = 1U << 11,
+       BINDER_DEBUG_INTERNAL_REFS          = 1U << 12,
+       BINDER_DEBUG_BUFFER_ALLOC           = 1U << 13,
+       BINDER_DEBUG_PRIORITY_CAP           = 1U << 14,
+       BINDER_DEBUG_BUFFER_ALLOC_ASYNC     = 1U << 15,
+};
+static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
+       BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
+module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
+static int binder_debug_no_lock;
+module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
+static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
+static int binder_stop_on_user_error;
+static int binder_set_stop_on_user_error(
+       const char *val, struct kernel_param *kp)
+{
+       int ret;
+       ret = param_set_int(val, kp);
+       if (binder_stop_on_user_error < 2)
+               wake_up(&binder_user_error_wait);
+       return ret;
+}
+module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
+       param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
+
+#define binder_user_error(x...) \
+       do { \
+               if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
+                       printk(KERN_INFO x); \
+               if (binder_stop_on_user_error) \
+                       binder_stop_on_user_error = 2; \
+       } while (0)
+
+enum {
+       BINDER_STAT_PROC,
+       BINDER_STAT_THREAD,
+       BINDER_STAT_NODE,
+       BINDER_STAT_REF,
+       BINDER_STAT_DEATH,
+       BINDER_STAT_TRANSACTION,
+       BINDER_STAT_TRANSACTION_COMPLETE,
+       BINDER_STAT_COUNT
+};
+
+struct binder_stats {
+       int br[_IOC_NR(BR_FAILED_REPLY) + 1];
+       int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
+       int obj_created[BINDER_STAT_COUNT];
+       int obj_deleted[BINDER_STAT_COUNT];
+};
+
+static struct binder_stats binder_stats;
+
+struct binder_transaction_log_entry {
+       int debug_id;
+       int call_type;
+       int from_proc;
+       int from_thread;
+       int target_handle;
+       int to_proc;
+       int to_thread;
+       int to_node;
+       int data_size;
+       int offsets_size;
+};
+struct binder_transaction_log {
+       int next;
+       int full;
+       struct binder_transaction_log_entry entry[32];
+};
+struct binder_transaction_log binder_transaction_log;
+struct binder_transaction_log binder_transaction_log_failed;
+
+static struct binder_transaction_log_entry *binder_transaction_log_add(
+       struct binder_transaction_log *log)
+{
+       struct binder_transaction_log_entry *e;
+       e = &log->entry[log->next];
+       memset(e, 0, sizeof(*e));
+       log->next++;
+       if (log->next == ARRAY_SIZE(log->entry)) {
+               log->next = 0;
+               log->full = 1;
+       }
+       return e;
+}
+
+struct binder_work {
+       struct list_head entry;
+       enum {
+               BINDER_WORK_TRANSACTION = 1,
+               BINDER_WORK_TRANSACTION_COMPLETE,
+               BINDER_WORK_NODE,
+               BINDER_WORK_DEAD_BINDER,
+               BINDER_WORK_DEAD_BINDER_AND_CLEAR,
+               BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
+       } type;
+};
+
+struct binder_node {
+       int debug_id;
+       struct binder_work work;
+       union {
+               struct rb_node rb_node;
+               struct hlist_node dead_node;
+       };
+       struct binder_proc *proc;
+       struct hlist_head refs;
+       int internal_strong_refs;
+       int local_weak_refs;
+       int local_strong_refs;
+       void __user *ptr;
+       void __user *cookie;
+       unsigned has_strong_ref : 1;
+       unsigned pending_strong_ref : 1;
+       unsigned has_weak_ref : 1;
+       unsigned pending_weak_ref : 1;
+       unsigned has_async_transaction : 1;
+       unsigned accept_fds : 1;
+       int min_priority : 8;
+       struct list_head async_todo;
+};
+
+struct binder_ref_death {
+       struct binder_work work;
+       void __user *cookie;
+};
+
+struct binder_ref {
+       /* Lookups needed: */
+       /*   node + proc => ref (transaction) */
+       /*   desc + proc => ref (transaction, inc/dec ref) */
+       /*   node => refs + procs (proc exit) */
+       int debug_id;
+       struct rb_node rb_node_desc;
+       struct rb_node rb_node_node;
+       struct hlist_node node_entry;
+       struct binder_proc *proc;
+       struct binder_node *node;
+       uint32_t desc;
+       int strong;
+       int weak;
+       struct binder_ref_death *death;
+};
+
+struct binder_buffer {
+       struct list_head entry; /* free and allocated entries by addesss */
+       struct rb_node rb_node; /* free entry by size or allocated entry */
+                               /* by address */
+       unsigned free : 1;
+       unsigned allow_user_free : 1;
+       unsigned async_transaction : 1;
+       unsigned debug_id : 29;
+
+       struct binder_transaction *transaction;
+
+       struct binder_node *target_node;
+       size_t data_size;
+       size_t offsets_size;
+       uint8_t data[0];
+};
+
+struct binder_proc {
+       struct hlist_node proc_node;
+       struct rb_root threads;
+       struct rb_root nodes;
+       struct rb_root refs_by_desc;
+       struct rb_root refs_by_node;
+       int pid;
+       struct vm_area_struct *vma;
+       struct task_struct *tsk;
+       void *buffer;
+       size_t user_buffer_offset;
+
+       struct list_head buffers;
+       struct rb_root free_buffers;
+       struct rb_root allocated_buffers;
+       size_t free_async_space;
+
+       struct page **pages;
+       size_t buffer_size;
+       uint32_t buffer_free;
+       struct list_head todo;
+       wait_queue_head_t wait;
+       struct binder_stats stats;
+       struct list_head delivered_death;
+       int max_threads;
+       int requested_threads;
+       int requested_threads_started;
+       int ready_threads;
+       long default_priority;
+};
+
+enum {
+       BINDER_LOOPER_STATE_REGISTERED  = 0x01,
+       BINDER_LOOPER_STATE_ENTERED     = 0x02,
+       BINDER_LOOPER_STATE_EXITED      = 0x04,
+       BINDER_LOOPER_STATE_INVALID     = 0x08,
+       BINDER_LOOPER_STATE_WAITING     = 0x10,
+       BINDER_LOOPER_STATE_NEED_RETURN = 0x20
+};
+
+struct binder_thread {
+       struct binder_proc *proc;
+       struct rb_node rb_node;
+       int pid;
+       int looper;
+       struct binder_transaction *transaction_stack;
+       struct list_head todo;
+       uint32_t return_error; /* Write failed, return error code in read buf */
+       uint32_t return_error2; /* Write failed, return error code in read */
+               /* buffer. Used when sending a reply to a dead process that */
+               /* we are also waiting on */
+       wait_queue_head_t wait;
+       struct binder_stats stats;
+};
+
+struct binder_transaction {
+       int debug_id;
+       struct binder_work work;
+       struct binder_thread *from;
+       struct binder_transaction *from_parent;
+       struct binder_proc *to_proc;
+       struct binder_thread *to_thread;
+       struct binder_transaction *to_parent;
+       unsigned need_reply : 1;
+       /*unsigned is_dead : 1;*/ /* not used at the moment */
+
+       struct binder_buffer *buffer;
+       unsigned int    code;
+       unsigned int    flags;
+       long    priority;
+       long    saved_priority;
+       uid_t   sender_euid;
+};
+
+/*
+ * copied from get_unused_fd_flags
+ */
+int task_get_unused_fd_flags(struct task_struct *tsk, int flags)
+{
+       struct files_struct *files = get_files_struct(tsk);
+       int fd, error;
+       struct fdtable *fdt;
+       unsigned long rlim_cur;
+
+       if (files == NULL)
+               return -ESRCH;
+
+       error = -EMFILE;
+       spin_lock(&files->file_lock);
+
+repeat:
+       fdt = files_fdtable(files);
+       fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds,
+                               files->next_fd);
+
+       /*
+        * N.B. For clone tasks sharing a files structure, this test
+        * will limit the total number of files that can be opened.
+        */
+       rcu_read_lock();
+       if (tsk->signal)
+               rlim_cur = tsk->signal->rlim[RLIMIT_NOFILE].rlim_cur;
+       else
+               rlim_cur = 0;
+       rcu_read_unlock();
+       if (fd >= rlim_cur)
+               goto out;
+
+       /* Do we need to expand the fd array or fd set?  */
+       error = expand_files(files, fd);
+       if (error < 0)
+               goto out;
+
+       if (error) {
+               /*
+                * If we needed to expand the fs array we
+                * might have blocked - try again.
+                */
+               error = -EMFILE;
+               goto repeat;
+       }
+
+       FD_SET(fd, fdt->open_fds);
+       if (flags & O_CLOEXEC)
+               FD_SET(fd, fdt->close_on_exec);
+       else
+               FD_CLR(fd, fdt->close_on_exec);
+       files->next_fd = fd + 1;
+#if 1
+       /* Sanity check */
+       if (fdt->fd[fd] != NULL) {
+               printk(KERN_WARNING "get_unused_fd: slot %d not NULL!\n", fd);
+               fdt->fd[fd] = NULL;
+       }
+#endif
+       error = fd;
+
+out:
+       spin_unlock(&files->file_lock);
+       put_files_struct(files);
+       return error;
+}
+
+/*
+ * copied from fd_install
+ */
+static void task_fd_install(
+       struct task_struct *tsk, unsigned int fd, struct file *file)
+{
+       struct files_struct *files = get_files_struct(tsk);
+       struct fdtable *fdt;
+
+       if (files == NULL)
+               return;
+
+       spin_lock(&files->file_lock);
+       fdt = files_fdtable(files);
+       BUG_ON(fdt->fd[fd] != NULL);
+       rcu_assign_pointer(fdt->fd[fd], file);
+       spin_unlock(&files->file_lock);
+       put_files_struct(files);
+}
+
+/*
+ * copied from __put_unused_fd in open.c
+ */
+static void __put_unused_fd(struct files_struct *files, unsigned int fd)
+{
+       struct fdtable *fdt = files_fdtable(files);
+       __FD_CLR(fd, fdt->open_fds);
+       if (fd < files->next_fd)
+               files->next_fd = fd;
+}
+
+/*
+ * copied from sys_close
+ */
+static long task_close_fd(struct task_struct *tsk, unsigned int fd)
+{
+       struct file *filp;
+       struct files_struct *files = get_files_struct(tsk);
+       struct fdtable *fdt;
+       int retval;
+
+       if (files == NULL)
+               return -ESRCH;
+
+       spin_lock(&files->file_lock);
+       fdt = files_fdtable(files);
+       if (fd >= fdt->max_fds)
+               goto out_unlock;
+       filp = fdt->fd[fd];
+       if (!filp)
+               goto out_unlock;
+       rcu_assign_pointer(fdt->fd[fd], NULL);
+       FD_CLR(fd, fdt->close_on_exec);
+       __put_unused_fd(files, fd);
+       spin_unlock(&files->file_lock);
+       retval = filp_close(filp, files);
+
+       /* can't restart close syscall because file table entry was cleared */
+       if (unlikely(retval == -ERESTARTSYS ||
+                    retval == -ERESTARTNOINTR ||
+                    retval == -ERESTARTNOHAND ||
+                    retval == -ERESTART_RESTARTBLOCK))
+               retval = -EINTR;
+
+       put_files_struct(files);
+       return retval;
+
+out_unlock:
+       spin_unlock(&files->file_lock);
+       put_files_struct(files);
+       return -EBADF;
+}
+
+static void binder_set_nice(long nice)
+{
+       long min_nice;
+       if (can_nice(current, nice)) {
+               set_user_nice(current, nice);
+               return;
+       }
+       min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur;
+       if (binder_debug_mask & BINDER_DEBUG_PRIORITY_CAP)
+               printk(KERN_INFO "binder: %d: nice value %ld not allowed use "
+                      "%ld instead\n", current->pid, nice, min_nice);
+       set_user_nice(current, min_nice);
+       if (min_nice < 20)
+               return;
+       binder_user_error("binder: %d RLIMIT_NICE not set\n", current->pid);
+}
+
+static size_t binder_buffer_size(
+       struct binder_proc *proc, struct binder_buffer *buffer)
+{
+       if (list_is_last(&buffer->entry, &proc->buffers))
+               return proc->buffer + proc->buffer_size - (void *)buffer->data;
+       else
+               return (size_t)list_entry(buffer->entry.next,
+                       struct binder_buffer, entry) - (size_t)buffer->data;
+}
+
+static void binder_insert_free_buffer(
+       struct binder_proc *proc, struct binder_buffer *new_buffer)
+{
+       struct rb_node **p = &proc->free_buffers.rb_node;
+       struct rb_node *parent = NULL;
+       struct binder_buffer *buffer;
+       size_t buffer_size;
+       size_t new_buffer_size;
+
+       BUG_ON(!new_buffer->free);
+
+       new_buffer_size = binder_buffer_size(proc, new_buffer);
+
+       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+               printk(KERN_INFO "binder: %d: add free buffer, size %d, "
+                      "at %p\n", proc->pid, new_buffer_size, new_buffer);
+
+       while (*p) {
+               parent = *p;
+               buffer = rb_entry(parent, struct binder_buffer, rb_node);
+               BUG_ON(!buffer->free);
+
+               buffer_size = binder_buffer_size(proc, buffer);
+
+               if (new_buffer_size < buffer_size)
+                       p = &parent->rb_left;
+               else
+                       p = &parent->rb_right;
+       }
+       rb_link_node(&new_buffer->rb_node, parent, p);
+       rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
+}
+
+static void binder_insert_allocated_buffer(
+       struct binder_proc *proc, struct binder_buffer *new_buffer)
+{
+       struct rb_node **p = &proc->allocated_buffers.rb_node;
+       struct rb_node *parent = NULL;
+       struct binder_buffer *buffer;
+
+       BUG_ON(new_buffer->free);
+
+       while (*p) {
+               parent = *p;
+               buffer = rb_entry(parent, struct binder_buffer, rb_node);
+               BUG_ON(buffer->free);
+
+               if (new_buffer < buffer)
+                       p = &parent->rb_left;
+               else if (new_buffer > buffer)
+                       p = &parent->rb_right;
+               else
+                       BUG();
+       }
+       rb_link_node(&new_buffer->rb_node, parent, p);
+       rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
+}
+
+static struct binder_buffer *binder_buffer_lookup(
+       struct binder_proc *proc, void __user *user_ptr)
+{
+       struct rb_node *n = proc->allocated_buffers.rb_node;
+       struct binder_buffer *buffer;
+       struct binder_buffer *kern_ptr;
+
+       kern_ptr = user_ptr - proc->user_buffer_offset
+               - offsetof(struct binder_buffer, data);
+
+       while (n) {
+               buffer = rb_entry(n, struct binder_buffer, rb_node);
+               BUG_ON(buffer->free);
+
+               if (kern_ptr < buffer)
+                       n = n->rb_left;
+               else if (kern_ptr > buffer)
+                       n = n->rb_right;
+               else
+                       return buffer;
+       }
+       return NULL;
+}
+
+static int binder_update_page_range(struct binder_proc *proc, int allocate,
+       void *start, void *end, struct vm_area_struct *vma)
+{
+       void *page_addr;
+       unsigned long user_page_addr;
+       struct vm_struct tmp_area;
+       struct page **page;
+       struct mm_struct *mm;
+
+       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+               printk(KERN_INFO "binder: %d: %s pages %p-%p\n",
+                      proc->pid, allocate ? "allocate" : "free", start, end);
+
+       if (end <= start)
+               return 0;
+
+       if (vma)
+               mm = NULL;
+       else
+               mm = get_task_mm(proc->tsk);
+
+       if (mm) {
+               down_write(&mm->mmap_sem);
+               vma = proc->vma;
+       }
+
+       if (allocate == 0)
+               goto free_range;
+
+       if (vma == NULL) {
+               printk(KERN_ERR "binder: %d: binder_alloc_buf failed to "
+                      "map pages in userspace, no vma\n", proc->pid);
+               goto err_no_vma;
+       }
+
+       for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
+               int ret;
+               struct page **page_array_ptr;
+               page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+
+               BUG_ON(*page);
+               *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+               if (*page == NULL) {
+                       printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+                              "for page at %p\n", proc->pid, page_addr);
+                       goto err_alloc_page_failed;
+               }
+               tmp_area.addr = page_addr;
+               tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */;
+               page_array_ptr = page;
+               ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr);
+               if (ret) {
+                       printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+                              "to map page at %p in kernel\n",
+                              proc->pid, page_addr);
+                       goto err_map_kernel_failed;
+               }
+               user_page_addr = (size_t)page_addr + proc->user_buffer_offset;
+               ret = vm_insert_page(vma, user_page_addr, page[0]);
+               if (ret) {
+                       printk(KERN_ERR "binder: %d: binder_alloc_buf failed "
+                              "to map page at %lx in userspace\n",
+                              proc->pid, user_page_addr);
+                       goto err_vm_insert_page_failed;
+               }
+               /* vm_insert_page does not seem to increment the refcount */
+       }
+       if (mm) {
+               up_write(&mm->mmap_sem);
+               mmput(mm);
+       }
+       return 0;
+
+free_range:
+       for (page_addr = end - PAGE_SIZE; page_addr >= start;
+            page_addr -= PAGE_SIZE) {
+               page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE];
+               if (vma)
+                       zap_page_range(vma, (size_t)page_addr +
+                               proc->user_buffer_offset, PAGE_SIZE, NULL);
+err_vm_insert_page_failed:
+               unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE);
+err_map_kernel_failed:
+               __free_page(*page);
+               *page = NULL;
+err_alloc_page_failed:
+               ;
+       }
+err_no_vma:
+       if (mm) {
+               up_write(&mm->mmap_sem);
+               mmput(mm);
+       }
+       return -ENOMEM;
+}
+
+static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc,
+       size_t data_size, size_t offsets_size, int is_async)
+{
+       struct rb_node *n = proc->free_buffers.rb_node;
+       struct binder_buffer *buffer;
+       size_t buffer_size;
+       struct rb_node *best_fit = NULL;
+       void *has_page_addr;
+       void *end_page_addr;
+       size_t size;
+
+       if (proc->vma == NULL) {
+               printk(KERN_ERR "binder: %d: binder_alloc_buf, no vma\n",
+                      proc->pid);
+               return NULL;
+       }
+
+       size = ALIGN(data_size, sizeof(void *)) +
+               ALIGN(offsets_size, sizeof(void *));
+
+       if (size < data_size || size < offsets_size) {
+               binder_user_error("binder: %d: got transaction with invalid "
+                       "size %d-%d\n", proc->pid, data_size, offsets_size);
+               return NULL;
+       }
+
+       if (is_async &&
+           proc->free_async_space < size + sizeof(struct binder_buffer)) {
+               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+                       printk(KERN_ERR "binder: %d: binder_alloc_buf size %d f"
+                              "ailed, no async space left\n", proc->pid, size);
+               return NULL;
+       }
+
+       while (n) {
+               buffer = rb_entry(n, struct binder_buffer, rb_node);
+               BUG_ON(!buffer->free);
+               buffer_size = binder_buffer_size(proc, buffer);
+
+               if (size < buffer_size) {
+                       best_fit = n;
+                       n = n->rb_left;
+               } else if (size > buffer_size)
+                       n = n->rb_right;
+               else {
+                       best_fit = n;
+                       break;
+               }
+       }
+       if (best_fit == NULL) {
+               printk(KERN_ERR "binder: %d: binder_alloc_buf size %d failed, "
+                      "no address space\n", proc->pid, size);
+               return NULL;
+       }
+       if (n == NULL) {
+               buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
+               buffer_size = binder_buffer_size(proc, buffer);
+       }
+       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+               printk(KERN_INFO "binder: %d: binder_alloc_buf size %d got buff"
+                      "er %p size %d\n", proc->pid, size, buffer, buffer_size);
+
+       has_page_addr =
+               (void *)(((size_t)buffer->data + buffer_size) & PAGE_MASK);
+       if (n == NULL) {
+               if (size + sizeof(struct binder_buffer) + 4 >= buffer_size)
+                       buffer_size = size; /* no room for other buffers */
+               else
+                       buffer_size = size + sizeof(struct binder_buffer);
+       }
+       end_page_addr = (void *)PAGE_ALIGN((size_t)buffer->data + buffer_size);
+       if (end_page_addr > has_page_addr)
+               end_page_addr = has_page_addr;
+       if (binder_update_page_range(proc, 1,
+           (void *)PAGE_ALIGN((size_t)buffer->data), end_page_addr, NULL))
+               return NULL;
+
+       rb_erase(best_fit, &proc->free_buffers);
+       buffer->free = 0;
+       binder_insert_allocated_buffer(proc, buffer);
+       if (buffer_size != size) {
+               struct binder_buffer *new_buffer = (void *)buffer->data + size;
+               list_add(&new_buffer->entry, &buffer->entry);
+               new_buffer->free = 1;
+               binder_insert_free_buffer(proc, new_buffer);
+       }
+       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+               printk(KERN_INFO "binder: %d: binder_alloc_buf size %d got "
+                      "%p\n", proc->pid, size, buffer);
+       buffer->data_size = data_size;
+       buffer->offsets_size = offsets_size;
+       buffer->async_transaction = is_async;
+       if (is_async) {
+               proc->free_async_space -= size + sizeof(struct binder_buffer);
+               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC)
+                       printk(KERN_INFO "binder: %d: binder_alloc_buf size %d "
+                              "async free %d\n", proc->pid, size,
+                              proc->free_async_space);
+       }
+
+       return buffer;
+}
+
+static void *buffer_start_page(struct binder_buffer *buffer)
+{
+       return (void *)((size_t)buffer & PAGE_MASK);
+}
+
+static void *buffer_end_page(struct binder_buffer *buffer)
+{
+       return (void *)(((size_t)(buffer + 1) - 1) & PAGE_MASK);
+}
+
+static void binder_delete_free_buffer(
+       struct binder_proc *proc, struct binder_buffer *buffer)
+{
+       struct binder_buffer *prev, *next = NULL;
+       int free_page_end = 1;
+       int free_page_start = 1;
+
+       BUG_ON(proc->buffers.next == &buffer->entry);
+       prev = list_entry(buffer->entry.prev, struct binder_buffer, entry);
+       BUG_ON(!prev->free);
+       if (buffer_end_page(prev) == buffer_start_page(buffer)) {
+               free_page_start = 0;
+               if (buffer_end_page(prev) == buffer_end_page(buffer))
+                       free_page_end = 0;
+               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+                       printk(KERN_INFO "binder: %d: merge free, buffer %p "
+                              "share page with %p\n", proc->pid, buffer, prev);
+       }
+
+       if (!list_is_last(&buffer->entry, &proc->buffers)) {
+               next = list_entry(buffer->entry.next,
+                                 struct binder_buffer, entry);
+               if (buffer_start_page(next) == buffer_end_page(buffer)) {
+                       free_page_end = 0;
+                       if (buffer_start_page(next) ==
+                           buffer_start_page(buffer))
+                               free_page_start = 0;
+                       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+                               printk(KERN_INFO "binder: %d: merge free, "
+                                      "buffer %p share page with %p\n",
+                                      proc->pid, buffer, prev);
+               }
+       }
+       list_del(&buffer->entry);
+       if (free_page_start || free_page_end) {
+               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+                       printk(KERN_INFO "binder: %d: merge free, buffer %p do "
+                              "not share page%s%s with with %p or %p\n",
+                              proc->pid, buffer, free_page_start ? "" : " end",
+                              free_page_end ? "" : " start", prev, next);
+               binder_update_page_range(proc, 0, free_page_start ?
+                       buffer_start_page(buffer) : buffer_end_page(buffer),
+                       (free_page_end ? buffer_end_page(buffer) :
+                       buffer_start_page(buffer)) + PAGE_SIZE, NULL);
+       }
+}
+
+static void binder_free_buf(
+       struct binder_proc *proc, struct binder_buffer *buffer)
+{
+       size_t size, buffer_size;
+
+       buffer_size = binder_buffer_size(proc, buffer);
+
+       size = ALIGN(buffer->data_size, sizeof(void *)) +
+               ALIGN(buffer->offsets_size, sizeof(void *));
+       if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+               printk(KERN_INFO "binder: %d: binder_free_buf %p size %d buffer"
+                      "_size %d\n", proc->pid, buffer, size, buffer_size);
+
+       BUG_ON(buffer->free);
+       BUG_ON(size > buffer_size);
+       BUG_ON(buffer->transaction != NULL);
+       BUG_ON((void *)buffer < proc->buffer);
+       BUG_ON((void *)buffer > proc->buffer + proc->buffer_size);
+
+       if (buffer->async_transaction) {
+               proc->free_async_space += size + sizeof(struct binder_buffer);
+               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC)
+                       printk(KERN_INFO "binder: %d: binder_free_buf size %d "
+                              "async free %d\n", proc->pid, size,
+                              proc->free_async_space);
+       }
+
+       binder_update_page_range(proc, 0,
+               (void *)PAGE_ALIGN((size_t)buffer->data),
+               (void *)(((size_t)buffer->data + buffer_size) & PAGE_MASK),
+               NULL);
+       rb_erase(&buffer->rb_node, &proc->allocated_buffers);
+       buffer->free = 1;
+       if (!list_is_last(&buffer->entry, &proc->buffers)) {
+               struct binder_buffer *next = list_entry(buffer->entry.next,
+                                               struct binder_buffer, entry);
+               if (next->free) {
+                       rb_erase(&next->rb_node, &proc->free_buffers);
+                       binder_delete_free_buffer(proc, next);
+               }
+       }
+       if (proc->buffers.next != &buffer->entry) {
+               struct binder_buffer *prev = list_entry(buffer->entry.prev,
+                                               struct binder_buffer, entry);
+               if (prev->free) {
+                       binder_delete_free_buffer(proc, buffer);
+                       rb_erase(&prev->rb_node, &proc->free_buffers);
+                       buffer = prev;
+               }
+       }
+       binder_insert_free_buffer(proc, buffer);
+}
+
+static struct binder_node *
+binder_get_node(struct binder_proc *proc, void __user *ptr)
+{
+       struct rb_node *n = proc->nodes.rb_node;
+       struct binder_node *node;
+
+       while (n) {
+               node = rb_entry(n, struct binder_node, rb_node);
+
+               if (ptr < node->ptr)
+                       n = n->rb_left;
+               else if (ptr > node->ptr)
+                       n = n->rb_right;
+               else
+                       return node;
+       }
+       return NULL;
+}
+
+static struct binder_node *
+binder_new_node(struct binder_proc *proc, void __user *ptr, void __user *cookie)
+{
+       struct rb_node **p = &proc->nodes.rb_node;
+       struct rb_node *parent = NULL;
+       struct binder_node *node;
+
+       while (*p) {
+               parent = *p;
+               node = rb_entry(parent, struct binder_node, rb_node);
+
+               if (ptr < node->ptr)
+                       p = &(*p)->rb_left;
+               else if (ptr > node->ptr)
+                       p = &(*p)->rb_right;
+               else
+                       return NULL;
+       }
+
+       node = kzalloc(sizeof(*node), GFP_KERNEL);
+       if (node == NULL)
+               return NULL;
+       binder_stats.obj_created[BINDER_STAT_NODE]++;
+       rb_link_node(&node->rb_node, parent, p);
+       rb_insert_color(&node->rb_node, &proc->nodes);
+       node->debug_id = ++binder_last_id;
+       node->proc = proc;
+       node->ptr = ptr;
+       node->cookie = cookie;
+       node->work.type = BINDER_WORK_NODE;
+       INIT_LIST_HEAD(&node->work.entry);
+       INIT_LIST_HEAD(&node->async_todo);
+       if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+               printk(KERN_INFO "binder: %d:%d node %d u%p c%p created\n",
+                      proc->pid, current->pid, node->debug_id,
+                      node->ptr, node->cookie);
+       return node;
+}
+
+static int
+binder_inc_node(struct binder_node *node, int strong, int internal,
+               struct list_head *target_list)
+{
+       if (strong) {
+               if (internal) {
+                       if (target_list == NULL &&
+                           node->internal_strong_refs == 0 &&
+                           !(node == binder_context_mgr_node &&
+                           node->has_strong_ref)) {
+                               printk(KERN_ERR "binder: invalid inc strong "
+                                       "node for %d\n", node->debug_id);
+                               return -EINVAL;
+                       }
+                       node->internal_strong_refs++;
+               } else
+                       node->local_strong_refs++;
+               if (!node->has_strong_ref && target_list) {
+                       list_del_init(&node->work.entry);
+                       list_add_tail(&node->work.entry, target_list);
+               }
+       } else {
+               if (!internal)
+                       node->local_weak_refs++;
+               if (!node->has_weak_ref && list_empty(&node->work.entry)) {
+                       if (target_list == NULL) {
+                               printk(KERN_ERR "binder: invalid inc weak node "
+                                       "for %d\n", node->debug_id);
+                               return -EINVAL;
+                       }
+                       list_add_tail(&node->work.entry, target_list);
+               }
+       }
+       return 0;
+}
+
+static int
+binder_dec_node(struct binder_node *node, int strong, int internal)
+{
+       if (strong) {
+               if (internal)
+                       node->internal_strong_refs--;
+               else
+                       node->local_strong_refs--;
+               if (node->local_strong_refs || node->internal_strong_refs)
+                       return 0;
+       } else {
+               if (!internal)
+                       node->local_weak_refs--;
+               if (node->local_weak_refs || !hlist_empty(&node->refs))
+                       return 0;
+       }
+       if (node->proc && (node->has_strong_ref || node->has_weak_ref)) {
+               if (list_empty(&node->work.entry)) {
+                       list_add_tail(&node->work.entry, &node->proc->todo);
+                       wake_up_interruptible(&node->proc->wait);
+               }
+       } else {
+               if (hlist_empty(&node->refs) && !node->local_strong_refs &&
+                   !node->local_weak_refs) {
+                       list_del_init(&node->work.entry);
+                       if (node->proc) {
+                               rb_erase(&node->rb_node, &node->proc->nodes);
+                               if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                                       printk(KERN_INFO "binder: refless node %d deleted\n", node->debug_id);
+                       } else {
+                               hlist_del(&node->dead_node);
+                               if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                                       printk(KERN_INFO "binder: dead node %d deleted\n", node->debug_id);
+                       }
+                       kfree(node);
+                       binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+               }
+       }
+
+       return 0;
+}
+
+
+static struct binder_ref *
+binder_get_ref(struct binder_proc *proc, uint32_t desc)
+{
+       struct rb_node *n = proc->refs_by_desc.rb_node;
+       struct binder_ref *ref;
+
+       while (n) {
+               ref = rb_entry(n, struct binder_ref, rb_node_desc);
+
+               if (desc < ref->desc)
+                       n = n->rb_left;
+               else if (desc > ref->desc)
+                       n = n->rb_right;
+               else
+                       return ref;
+       }
+       return NULL;
+}
+
+static struct binder_ref *
+binder_get_ref_for_node(struct binder_proc *proc, struct binder_node *node)
+{
+       struct rb_node *n;
+       struct rb_node **p = &proc->refs_by_node.rb_node;
+       struct rb_node *parent = NULL;
+       struct binder_ref *ref, *new_ref;
+
+       while (*p) {
+               parent = *p;
+               ref = rb_entry(parent, struct binder_ref, rb_node_node);
+
+               if (node < ref->node)
+                       p = &(*p)->rb_left;
+               else if (node > ref->node)
+                       p = &(*p)->rb_right;
+               else
+                       return ref;
+       }
+       new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
+       if (new_ref == NULL)
+               return NULL;
+       binder_stats.obj_created[BINDER_STAT_REF]++;
+       new_ref->debug_id = ++binder_last_id;
+       new_ref->proc = proc;
+       new_ref->node = node;
+       rb_link_node(&new_ref->rb_node_node, parent, p);
+       rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
+
+       new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1;
+       for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+               ref = rb_entry(n, struct binder_ref, rb_node_desc);
+               if (ref->desc > new_ref->desc)
+                       break;
+               new_ref->desc = ref->desc + 1;
+       }
+
+       p = &proc->refs_by_desc.rb_node;
+       while (*p) {
+               parent = *p;
+               ref = rb_entry(parent, struct binder_ref, rb_node_desc);
+
+               if (new_ref->desc < ref->desc)
+                       p = &(*p)->rb_left;
+               else if (new_ref->desc > ref->desc)
+                       p = &(*p)->rb_right;
+               else
+                       BUG();
+       }
+       rb_link_node(&new_ref->rb_node_desc, parent, p);
+       rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
+       if (node) {
+               hlist_add_head(&new_ref->node_entry, &node->refs);
+               if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                       printk(KERN_INFO "binder: %d new ref %d desc %d for "
+                               "node %d\n", proc->pid, new_ref->debug_id,
+                               new_ref->desc, node->debug_id);
+       } else {
+               if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                       printk(KERN_INFO "binder: %d new ref %d desc %d for "
+                               "dead node\n", proc->pid, new_ref->debug_id,
+                               new_ref->desc);
+       }
+       return new_ref;
+}
+
+static void
+binder_delete_ref(struct binder_ref *ref)
+{
+       if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+               printk(KERN_INFO "binder: %d delete ref %d desc %d for "
+                       "node %d\n", ref->proc->pid, ref->debug_id,
+                       ref->desc, ref->node->debug_id);
+       rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
+       rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
+       if (ref->strong)
+               binder_dec_node(ref->node, 1, 1);
+       hlist_del(&ref->node_entry);
+       binder_dec_node(ref->node, 0, 1);
+       if (ref->death) {
+               if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                       printk(KERN_INFO "binder: %d delete ref %d desc %d "
+                               "has death notification\n", ref->proc->pid,
+                               ref->debug_id, ref->desc);
+               list_del(&ref->death->work.entry);
+               kfree(ref->death);
+               binder_stats.obj_deleted[BINDER_STAT_DEATH]++;
+       }
+       kfree(ref);
+       binder_stats.obj_deleted[BINDER_STAT_REF]++;
+}
+
+static int
+binder_inc_ref(
+       struct binder_ref *ref, int strong, struct list_head *target_list)
+{
+       int ret;
+       if (strong) {
+               if (ref->strong == 0) {
+                       ret = binder_inc_node(ref->node, 1, 1, target_list);
+                       if (ret)
+                               return ret;
+               }
+               ref->strong++;
+       } else {
+               if (ref->weak == 0) {
+                       ret = binder_inc_node(ref->node, 0, 1, target_list);
+                       if (ret)
+                               return ret;
+               }
+               ref->weak++;
+       }
+       return 0;
+}
+
+
+static int
+binder_dec_ref(struct binder_ref *ref, int strong)
+{
+       if (strong) {
+               if (ref->strong == 0) {
+                       binder_user_error("binder: %d invalid dec strong, "
+                                         "ref %d desc %d s %d w %d\n",
+                                         ref->proc->pid, ref->debug_id,
+                                         ref->desc, ref->strong, ref->weak);
+                       return -EINVAL;
+               }
+               ref->strong--;
+               if (ref->strong == 0) {
+                       int ret;
+                       ret = binder_dec_node(ref->node, strong, 1);
+                       if (ret)
+                               return ret;
+               }
+       } else {
+               if (ref->weak == 0) {
+                       binder_user_error("binder: %d invalid dec weak, "
+                                         "ref %d desc %d s %d w %d\n",
+                                         ref->proc->pid, ref->debug_id,
+                                         ref->desc, ref->strong, ref->weak);
+                       return -EINVAL;
+               }
+               ref->weak--;
+       }
+       if (ref->strong == 0 && ref->weak == 0)
+               binder_delete_ref(ref);
+       return 0;
+}
+
+static void
+binder_pop_transaction(
+       struct binder_thread *target_thread, struct binder_transaction *t)
+{
+       if (target_thread) {
+               BUG_ON(target_thread->transaction_stack != t);
+               BUG_ON(target_thread->transaction_stack->from != target_thread);
+               target_thread->transaction_stack =
+                       target_thread->transaction_stack->from_parent;
+               t->from = NULL;
+       }
+       t->need_reply = 0;
+       if (t->buffer)
+               t->buffer->transaction = NULL;
+       kfree(t);
+       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+}
+
+static void
+binder_send_failed_reply(struct binder_transaction *t, uint32_t error_code)
+{
+       struct binder_thread *target_thread;
+       BUG_ON(t->flags & TF_ONE_WAY);
+       while (1) {
+               target_thread = t->from;
+               if (target_thread) {
+                       if (target_thread->return_error != BR_OK &&
+                          target_thread->return_error2 == BR_OK) {
+                               target_thread->return_error2 =
+                                       target_thread->return_error;
+                               target_thread->return_error = BR_OK;
+                       }
+                       if (target_thread->return_error == BR_OK) {
+                               if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+                                       printk(KERN_INFO "binder: send failed reply for transaction %d to %d:%d\n",
+                                              t->debug_id, target_thread->proc->pid, target_thread->pid);
+
+                               binder_pop_transaction(target_thread, t);
+                               target_thread->return_error = error_code;
+                               wake_up_interruptible(&target_thread->wait);
+                       } else {
+                               printk(KERN_ERR "binder: reply failed, target "
+                                       "thread, %d:%d, has error code %d "
+                                       "already\n", target_thread->proc->pid,
+                                       target_thread->pid,
+                                       target_thread->return_error);
+                       }
+                       return;
+               } else {
+                       struct binder_transaction *next = t->from_parent;
+
+                       if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+                               printk(KERN_INFO "binder: send failed reply "
+                                       "for transaction %d, target dead\n",
+                                       t->debug_id);
+
+                       binder_pop_transaction(target_thread, t);
+                       if (next == NULL) {
+                               if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                                       printk(KERN_INFO "binder: reply failed,"
+                                               " no target thread at root\n");
+                               return;
+                       }
+                       t = next;
+                       if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                               printk(KERN_INFO "binder: reply failed, no targ"
+                                       "et thread -- retry %d\n", t->debug_id);
+               }
+       }
+}
+
+static void
+binder_transaction_buffer_release(struct binder_proc *proc,
+                       struct binder_buffer *buffer, size_t *failed_at);
+
+static void
+binder_transaction(struct binder_proc *proc, struct binder_thread *thread,
+       struct binder_transaction_data *tr, int reply)
+{
+       struct binder_transaction *t;
+       struct binder_work *tcomplete;
+       size_t *offp, *off_end;
+       struct binder_proc *target_proc;
+       struct binder_thread *target_thread = NULL;
+       struct binder_node *target_node = NULL;
+       struct list_head *target_list;
+       wait_queue_head_t *target_wait;
+       struct binder_transaction *in_reply_to = NULL;
+       struct binder_transaction_log_entry *e;
+       uint32_t return_error;
+
+       e = binder_transaction_log_add(&binder_transaction_log);
+       e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
+       e->from_proc = proc->pid;
+       e->from_thread = thread->pid;
+       e->target_handle = tr->target.handle;
+       e->data_size = tr->data_size;
+       e->offsets_size = tr->offsets_size;
+
+       if (reply) {
+               in_reply_to = thread->transaction_stack;
+               if (in_reply_to == NULL) {
+                       binder_user_error("binder: %d:%d got reply transaction "
+                                         "with no transaction stack\n",
+                                         proc->pid, thread->pid);
+                       return_error = BR_FAILED_REPLY;
+                       goto err_empty_call_stack;
+               }
+               binder_set_nice(in_reply_to->saved_priority);
+               if (in_reply_to->to_thread != thread) {
+                       binder_user_error("binder: %d:%d got reply transaction "
+                               "with bad transaction stack,"
+                               " transaction %d has target %d:%d\n",
+                               proc->pid, thread->pid, in_reply_to->debug_id,
+                               in_reply_to->to_proc ?
+                               in_reply_to->to_proc->pid : 0,
+                               in_reply_to->to_thread ?
+                               in_reply_to->to_thread->pid : 0);
+                       return_error = BR_FAILED_REPLY;
+                       in_reply_to = NULL;
+                       goto err_bad_call_stack;
+               }
+               thread->transaction_stack = in_reply_to->to_parent;
+               target_thread = in_reply_to->from;
+               if (target_thread == NULL) {
+                       return_error = BR_DEAD_REPLY;
+                       goto err_dead_binder;
+               }
+               if (target_thread->transaction_stack != in_reply_to) {
+                       binder_user_error("binder: %d:%d got reply transaction "
+                               "with bad target transaction stack %d, "
+                               "expected %d\n",
+                               proc->pid, thread->pid,
+                               target_thread->transaction_stack ?
+                               target_thread->transaction_stack->debug_id : 0,
+                               in_reply_to->debug_id);
+                       return_error = BR_FAILED_REPLY;
+                       in_reply_to = NULL;
+                       target_thread = NULL;
+                       goto err_dead_binder;
+               }
+               target_proc = target_thread->proc;
+       } else {
+               if (tr->target.handle) {
+                       struct binder_ref *ref;
+                       ref = binder_get_ref(proc, tr->target.handle);
+                       if (ref == NULL) {
+                               binder_user_error("binder: %d:%d got "
+                                       "transaction to invalid handle\n",
+                                       proc->pid, thread->pid);
+                               return_error = BR_FAILED_REPLY;
+                               goto err_invalid_target_handle;
+                       }
+                       target_node = ref->node;
+               } else {
+                       target_node = binder_context_mgr_node;
+                       if (target_node == NULL) {
+                               return_error = BR_DEAD_REPLY;
+                               goto err_no_context_mgr_node;
+                       }
+               }
+               e->to_node = target_node->debug_id;
+               target_proc = target_node->proc;
+               if (target_proc == NULL) {
+                       return_error = BR_DEAD_REPLY;
+                       goto err_dead_binder;
+               }
+               if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
+                       struct binder_transaction *tmp;
+                       tmp = thread->transaction_stack;
+                       while (tmp) {
+                               if (tmp->from && tmp->from->proc == target_proc)
+                                       target_thread = tmp->from;
+                               tmp = tmp->from_parent;
+                       }
+               }
+       }
+       if (target_thread) {
+               e->to_thread = target_thread->pid;
+               target_list = &target_thread->todo;
+               target_wait = &target_thread->wait;
+       } else {
+               target_list = &target_proc->todo;
+               target_wait = &target_proc->wait;
+       }
+       e->to_proc = target_proc->pid;
+
+       /* TODO: reuse incoming transaction for reply */
+       t = kzalloc(sizeof(*t), GFP_KERNEL);
+       if (t == NULL) {
+               return_error = BR_FAILED_REPLY;
+               goto err_alloc_t_failed;
+       }
+       binder_stats.obj_created[BINDER_STAT_TRANSACTION]++;
+
+       tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
+       if (tcomplete == NULL) {
+               return_error = BR_FAILED_REPLY;
+               goto err_alloc_tcomplete_failed;
+       }
+       binder_stats.obj_created[BINDER_STAT_TRANSACTION_COMPLETE]++;
+
+       t->debug_id = ++binder_last_id;
+       e->debug_id = t->debug_id;
+
+       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) {
+               if (reply)
+                       printk(KERN_INFO "binder: %d:%d BC_REPLY %d -> %d:%d, "
+                              "data %p-%p size %d-%d\n",
+                              proc->pid, thread->pid, t->debug_id,
+                              target_proc->pid, target_thread->pid,
+                              tr->data.ptr.buffer, tr->data.ptr.offsets,
+                              tr->data_size, tr->offsets_size);
+               else
+                       printk(KERN_INFO "binder: %d:%d BC_TRANSACTION %d -> "
+                              "%d - node %d, data %p-%p size %d-%d\n",
+                              proc->pid, thread->pid, t->debug_id,
+                              target_proc->pid, target_node->debug_id,
+                              tr->data.ptr.buffer, tr->data.ptr.offsets,
+                              tr->data_size, tr->offsets_size);
+       }
+
+       if (!reply && !(tr->flags & TF_ONE_WAY))
+               t->from = thread;
+       else
+               t->from = NULL;
+       t->sender_euid = proc->tsk->euid;
+       t->to_proc = target_proc;
+       t->to_thread = target_thread;
+       t->code = tr->code;
+       t->flags = tr->flags;
+       t->priority = task_nice(current);
+       t->buffer = binder_alloc_buf(target_proc, tr->data_size,
+               tr->offsets_size, !reply && (t->flags & TF_ONE_WAY));
+       if (t->buffer == NULL) {
+               return_error = BR_FAILED_REPLY;
+               goto err_binder_alloc_buf_failed;
+       }
+       t->buffer->allow_user_free = 0;
+       t->buffer->debug_id = t->debug_id;
+       t->buffer->transaction = t;
+       t->buffer->target_node = target_node;
+       if (target_node)
+               binder_inc_node(target_node, 1, 0, NULL);
+
+       offp = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *)));
+
+       if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) {
+               binder_user_error("binder: %d:%d got transaction with invalid "
+                       "data ptr\n", proc->pid, thread->pid);
+               return_error = BR_FAILED_REPLY;
+               goto err_copy_data_failed;
+       }
+       if (copy_from_user(offp, tr->data.ptr.offsets, tr->offsets_size)) {
+               binder_user_error("binder: %d:%d got transaction with invalid "
+                       "offsets ptr\n", proc->pid, thread->pid);
+               return_error = BR_FAILED_REPLY;
+               goto err_copy_data_failed;
+       }
+       off_end = (void *)offp + tr->offsets_size;
+       for (; offp < off_end; offp++) {
+               struct flat_binder_object *fp;
+               if (*offp > t->buffer->data_size - sizeof(*fp)) {
+                       binder_user_error("binder: %d:%d got transaction with "
+                               "invalid offset, %d\n",
+                               proc->pid, thread->pid, *offp);
+                       return_error = BR_FAILED_REPLY;
+                       goto err_bad_offset;
+               }
+               fp = (struct flat_binder_object *)(t->buffer->data + *offp);
+               switch (fp->type) {
+               case BINDER_TYPE_BINDER:
+               case BINDER_TYPE_WEAK_BINDER: {
+                       struct binder_ref *ref;
+                       struct binder_node *node = binder_get_node(proc, fp->binder);
+                       if (node == NULL) {
+                               node = binder_new_node(proc, fp->binder, fp->cookie);
+                               if (node == NULL) {
+                                       return_error = BR_FAILED_REPLY;
+                                       goto err_binder_new_node_failed;
+                               }
+                               node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
+                               node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
+                       }
+                       if (fp->cookie != node->cookie) {
+                               binder_user_error("binder: %d:%d sending u%p "
+                                       "node %d, cookie mismatch %p != %p\n",
+                                       proc->pid, thread->pid,
+                                       fp->binder, node->debug_id,
+                                       fp->cookie, node->cookie);
+                               goto err_binder_get_ref_for_node_failed;
+                       }
+                       ref = binder_get_ref_for_node(target_proc, node);
+                       if (ref == NULL) {
+                               return_error = BR_FAILED_REPLY;
+                               goto err_binder_get_ref_for_node_failed;
+                       }
+                       if (fp->type == BINDER_TYPE_BINDER)
+                               fp->type = BINDER_TYPE_HANDLE;
+                       else
+                               fp->type = BINDER_TYPE_WEAK_HANDLE;
+                       fp->handle = ref->desc;
+                       binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, &thread->todo);
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                               printk(KERN_INFO "        node %d u%p -> ref %d desc %d\n",
+                                      node->debug_id, node->ptr, ref->debug_id, ref->desc);
+               } break;
+               case BINDER_TYPE_HANDLE:
+               case BINDER_TYPE_WEAK_HANDLE: {
+                       struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+                       if (ref == NULL) {
+                               binder_user_error("binder: %d:%d got "
+                                       "transaction with invalid "
+                                       "handle, %ld\n", proc->pid,
+                                       thread->pid, fp->handle);
+                               return_error = BR_FAILED_REPLY;
+                               goto err_binder_get_ref_failed;
+                       }
+                       if (ref->node->proc == target_proc) {
+                               if (fp->type == BINDER_TYPE_HANDLE)
+                                       fp->type = BINDER_TYPE_BINDER;
+                               else
+                                       fp->type = BINDER_TYPE_WEAK_BINDER;
+                               fp->binder = ref->node->ptr;
+                               fp->cookie = ref->node->cookie;
+                               binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL);
+                               if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                                       printk(KERN_INFO "        ref %d desc %d -> node %d u%p\n",
+                                              ref->debug_id, ref->desc, ref->node->debug_id, ref->node->ptr);
+                       } else {
+                               struct binder_ref *new_ref;
+                               new_ref = binder_get_ref_for_node(target_proc, ref->node);
+                               if (new_ref == NULL) {
+                                       return_error = BR_FAILED_REPLY;
+                                       goto err_binder_get_ref_for_node_failed;
+                               }
+                               fp->handle = new_ref->desc;
+                               binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
+                               if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                                       printk(KERN_INFO "        ref %d desc %d -> ref %d desc %d (node %d)\n",
+                                              ref->debug_id, ref->desc, new_ref->debug_id, new_ref->desc, ref->node->debug_id);
+                       }
+               } break;
+
+               case BINDER_TYPE_FD: {
+                       int target_fd;
+                       struct file *file;
+
+                       if (reply) {
+                               if (!(in_reply_to->flags & TF_ACCEPT_FDS)) {
+                                       binder_user_error("binder: %d:%d got reply with fd, %ld, but target does not allow fds\n",
+                                               proc->pid, thread->pid, fp->handle);
+                                       return_error = BR_FAILED_REPLY;
+                                       goto err_fd_not_allowed;
+                               }
+                       } else if (!target_node->accept_fds) {
+                               binder_user_error("binder: %d:%d got transaction with fd, %ld, but target does not allow fds\n",
+                                       proc->pid, thread->pid, fp->handle);
+                               return_error = BR_FAILED_REPLY;
+                               goto err_fd_not_allowed;
+                       }
+
+                       file = fget(fp->handle);
+                       if (file == NULL) {
+                               binder_user_error("binder: %d:%d got transaction with invalid fd, %ld\n",
+                                       proc->pid, thread->pid, fp->handle);
+                               return_error = BR_FAILED_REPLY;
+                               goto err_fget_failed;
+                       }
+                       target_fd = task_get_unused_fd_flags(target_proc->tsk, O_CLOEXEC);
+                       if (target_fd < 0) {
+                               fput(file);
+                               return_error = BR_FAILED_REPLY;
+                               goto err_get_unused_fd_failed;
+                       }
+                       task_fd_install(target_proc->tsk, target_fd, file);
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                               printk(KERN_INFO "        fd %ld -> %d\n", fp->handle, target_fd);
+                       /* TODO: fput? */
+                       fp->handle = target_fd;
+               } break;
+
+               default:
+                       binder_user_error("binder: %d:%d got transactio"
+                               "n with invalid object type, %lx\n",
+                               proc->pid, thread->pid, fp->type);
+                       return_error = BR_FAILED_REPLY;
+                       goto err_bad_object_type;
+               }
+       }
+       if (reply) {
+               BUG_ON(t->buffer->async_transaction != 0);
+               binder_pop_transaction(target_thread, in_reply_to);
+       } else if (!(t->flags & TF_ONE_WAY)) {
+               BUG_ON(t->buffer->async_transaction != 0);
+               t->need_reply = 1;
+               t->from_parent = thread->transaction_stack;
+               thread->transaction_stack = t;
+       } else {
+               BUG_ON(target_node == NULL);
+               BUG_ON(t->buffer->async_transaction != 1);
+               if (target_node->has_async_transaction) {
+                       target_list = &target_node->async_todo;
+                       target_wait = NULL;
+               } else
+                       target_node->has_async_transaction = 1;
+       }
+       t->work.type = BINDER_WORK_TRANSACTION;
+       list_add_tail(&t->work.entry, target_list);
+       tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
+       list_add_tail(&tcomplete->entry, &thread->todo);
+       if (target_wait)
+               wake_up_interruptible(target_wait);
+       return;
+
+err_get_unused_fd_failed:
+err_fget_failed:
+err_fd_not_allowed:
+err_binder_get_ref_for_node_failed:
+err_binder_get_ref_failed:
+err_binder_new_node_failed:
+err_bad_object_type:
+err_bad_offset:
+err_copy_data_failed:
+       binder_transaction_buffer_release(target_proc, t->buffer, offp);
+       t->buffer->transaction = NULL;
+       binder_free_buf(target_proc, t->buffer);
+err_binder_alloc_buf_failed:
+       kfree(tcomplete);
+       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+err_alloc_tcomplete_failed:
+       kfree(t);
+       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+err_alloc_t_failed:
+err_bad_call_stack:
+err_empty_call_stack:
+err_dead_binder:
+err_invalid_target_handle:
+err_no_context_mgr_node:
+       if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+               printk(KERN_INFO "binder: %d:%d transaction failed %d, size %d-%d\n",
+                          proc->pid, thread->pid, return_error,
+                          tr->data_size, tr->offsets_size);
+
+       {
+               struct binder_transaction_log_entry *fe;
+               fe = binder_transaction_log_add(&binder_transaction_log_failed);
+               *fe = *e;
+       }
+
+       BUG_ON(thread->return_error != BR_OK);
+       if (in_reply_to) {
+               thread->return_error = BR_TRANSACTION_COMPLETE;
+               binder_send_failed_reply(in_reply_to, return_error);
+       } else
+               thread->return_error = return_error;
+}
+
+static void
+binder_transaction_buffer_release(struct binder_proc *proc, struct binder_buffer *buffer, size_t *failed_at)
+{
+       size_t *offp, *off_end;
+       int debug_id = buffer->debug_id;
+
+       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+               printk(KERN_INFO "binder: %d buffer release %d, size %d-%d, failed at %p\n",
+                          proc->pid, buffer->debug_id,
+                          buffer->data_size, buffer->offsets_size, failed_at);
+
+       if (buffer->target_node)
+               binder_dec_node(buffer->target_node, 1, 0);
+
+       offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *)));
+       if (failed_at)
+               off_end = failed_at;
+       else
+               off_end = (void *)offp + buffer->offsets_size;
+       for (; offp < off_end; offp++) {
+               struct flat_binder_object *fp;
+               if (*offp > buffer->data_size - sizeof(*fp)) {
+                       printk(KERN_ERR "binder: transaction release %d bad offset %d, size %d\n", debug_id, *offp, buffer->data_size);
+                       continue;
+               }
+               fp = (struct flat_binder_object *)(buffer->data + *offp);
+               switch (fp->type) {
+               case BINDER_TYPE_BINDER:
+               case BINDER_TYPE_WEAK_BINDER: {
+                       struct binder_node *node = binder_get_node(proc, fp->binder);
+                       if (node == NULL) {
+                               printk(KERN_ERR "binder: transaction release %d bad node %p\n", debug_id, fp->binder);
+                               break;
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                               printk(KERN_INFO "        node %d u%p\n",
+                                      node->debug_id, node->ptr);
+                       binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
+               } break;
+               case BINDER_TYPE_HANDLE:
+               case BINDER_TYPE_WEAK_HANDLE: {
+                       struct binder_ref *ref = binder_get_ref(proc, fp->handle);
+                       if (ref == NULL) {
+                               printk(KERN_ERR "binder: transaction release %d bad handle %ld\n", debug_id, fp->handle);
+                               break;
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                               printk(KERN_INFO "        ref %d desc %d (node %d)\n",
+                                      ref->debug_id, ref->desc, ref->node->debug_id);
+                       binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE);
+               } break;
+
+               case BINDER_TYPE_FD:
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                               printk(KERN_INFO "        fd %ld\n", fp->handle);
+                       if (failed_at)
+                               task_close_fd(proc->tsk, fp->handle);
+                       break;
+
+               default:
+                       printk(KERN_ERR "binder: transaction release %d bad object type %lx\n", debug_id, fp->type);
+                       break;
+               }
+       }
+}
+
+int
+binder_thread_write(struct binder_proc *proc, struct binder_thread *thread,
+                   void __user *buffer, int size, signed long *consumed)
+{
+       uint32_t cmd;
+       void __user *ptr = buffer + *consumed;
+       void __user *end = buffer + size;
+
+       while (ptr < end && thread->return_error == BR_OK) {
+               if (get_user(cmd, (uint32_t __user *)ptr))
+                       return -EFAULT;
+               ptr += sizeof(uint32_t);
+               if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
+                       binder_stats.bc[_IOC_NR(cmd)]++;
+                       proc->stats.bc[_IOC_NR(cmd)]++;
+                       thread->stats.bc[_IOC_NR(cmd)]++;
+               }
+               switch (cmd) {
+               case BC_INCREFS:
+               case BC_ACQUIRE:
+               case BC_RELEASE:
+               case BC_DECREFS: {
+                       uint32_t target;
+                       struct binder_ref *ref;
+                       const char *debug_string;
+
+                       if (get_user(target, (uint32_t __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(uint32_t);
+                       if (target == 0 && binder_context_mgr_node &&
+                           (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) {
+                               ref = binder_get_ref_for_node(proc,
+                                              binder_context_mgr_node);
+                               if (ref->desc != target) {
+                                       binder_user_error("binder: %d:"
+                                               "%d tried to acquire "
+                                               "reference to desc 0, "
+                                               "got %d instead\n",
+                                               proc->pid, thread->pid,
+                                               ref->desc);
+                               }
+                       } else
+                               ref = binder_get_ref(proc, target);
+                       if (ref == NULL) {
+                               binder_user_error("binder: %d:%d refcou"
+                                       "nt change on invalid ref %d\n",
+                                       proc->pid, thread->pid, target);
+                               break;
+                       }
+                       switch (cmd) {
+                       case BC_INCREFS:
+                               debug_string = "IncRefs";
+                               binder_inc_ref(ref, 0, NULL);
+                               break;
+                       case BC_ACQUIRE:
+                               debug_string = "Acquire";
+                               binder_inc_ref(ref, 1, NULL);
+                               break;
+                       case BC_RELEASE:
+                               debug_string = "Release";
+                               binder_dec_ref(ref, 1);
+                               break;
+                       case BC_DECREFS:
+                       default:
+                               debug_string = "DecRefs";
+                               binder_dec_ref(ref, 0);
+                               break;
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+                               printk(KERN_INFO "binder: %d:%d %s ref %d desc %d s %d w %d for node %d\n",
+                                      proc->pid, thread->pid, debug_string, ref->debug_id, ref->desc, ref->strong, ref->weak, ref->node->debug_id);
+                       break;
+               }
+               case BC_INCREFS_DONE:
+               case BC_ACQUIRE_DONE: {
+                       void __user *node_ptr;
+                       void *cookie;
+                       struct binder_node *node;
+
+                       if (get_user(node_ptr, (void * __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(void *);
+                       if (get_user(cookie, (void * __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(void *);
+                       node = binder_get_node(proc, node_ptr);
+                       if (node == NULL) {
+                               binder_user_error("binder: %d:%d "
+                                       "%s u%p no match\n",
+                                       proc->pid, thread->pid,
+                                       cmd == BC_INCREFS_DONE ?
+                                       "BC_INCREFS_DONE" :
+                                       "BC_ACQUIRE_DONE",
+                                       node_ptr);
+                               break;
+                       }
+                       if (cookie != node->cookie) {
+                               binder_user_error("binder: %d:%d %s u%p node %d"
+                                       " cookie mismatch %p != %p\n",
+                                       proc->pid, thread->pid,
+                                       cmd == BC_INCREFS_DONE ?
+                                       "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
+                                       node_ptr, node->debug_id,
+                                       cookie, node->cookie);
+                               break;
+                       }
+                       if (cmd == BC_ACQUIRE_DONE) {
+                               if (node->pending_strong_ref == 0) {
+                                       binder_user_error("binder: %d:%d "
+                                               "BC_ACQUIRE_DONE node %d has "
+                                               "no pending acquire request\n",
+                                               proc->pid, thread->pid,
+                                               node->debug_id);
+                                       break;
+                               }
+                               node->pending_strong_ref = 0;
+                       } else {
+                               if (node->pending_weak_ref == 0) {
+                                       binder_user_error("binder: %d:%d "
+                                               "BC_INCREFS_DONE node %d has "
+                                               "no pending increfs request\n",
+                                               proc->pid, thread->pid,
+                                               node->debug_id);
+                                       break;
+                               }
+                               node->pending_weak_ref = 0;
+                       }
+                       binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0);
+                       if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+                               printk(KERN_INFO "binder: %d:%d %s node %d ls %d lw %d\n",
+                                      proc->pid, thread->pid, cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", node->debug_id, node->local_strong_refs, node->local_weak_refs);
+                       break;
+               }
+               case BC_ATTEMPT_ACQUIRE:
+                       printk(KERN_ERR "binder: BC_ATTEMPT_ACQUIRE not supported\n");
+                       return -EINVAL;
+               case BC_ACQUIRE_RESULT:
+                       printk(KERN_ERR "binder: BC_ACQUIRE_RESULT not supported\n");
+                       return -EINVAL;
+
+               case BC_FREE_BUFFER: {
+                       void __user *data_ptr;
+                       struct binder_buffer *buffer;
+
+                       if (get_user(data_ptr, (void * __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(void *);
+
+                       buffer = binder_buffer_lookup(proc, data_ptr);
+                       if (buffer == NULL) {
+                               binder_user_error("binder: %d:%d "
+                                       "BC_FREE_BUFFER u%p no match\n",
+                                       proc->pid, thread->pid, data_ptr);
+                               break;
+                       }
+                       if (!buffer->allow_user_free) {
+                               binder_user_error("binder: %d:%d "
+                                       "BC_FREE_BUFFER u%p matched "
+                                       "unreturned buffer\n",
+                                       proc->pid, thread->pid, data_ptr);
+                               break;
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_FREE_BUFFER)
+                               printk(KERN_INFO "binder: %d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n",
+                                      proc->pid, thread->pid, data_ptr, buffer->debug_id,
+                                      buffer->transaction ? "active" : "finished");
+
+                       if (buffer->transaction) {
+                               buffer->transaction->buffer = NULL;
+                               buffer->transaction = NULL;
+                       }
+                       if (buffer->async_transaction && buffer->target_node) {
+                               BUG_ON(!buffer->target_node->has_async_transaction);
+                               if (list_empty(&buffer->target_node->async_todo))
+                                       buffer->target_node->has_async_transaction = 0;
+                               else
+                                       list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
+                       }
+                       binder_transaction_buffer_release(proc, buffer, NULL);
+                       binder_free_buf(proc, buffer);
+                       break;
+               }
+
+               case BC_TRANSACTION:
+               case BC_REPLY: {
+                       struct binder_transaction_data tr;
+
+                       if (copy_from_user(&tr, ptr, sizeof(tr)))
+                               return -EFAULT;
+                       ptr += sizeof(tr);
+                       binder_transaction(proc, thread, &tr, cmd == BC_REPLY);
+                       break;
+               }
+
+               case BC_REGISTER_LOOPER:
+                       if (binder_debug_mask & BINDER_DEBUG_THREADS)
+                               printk(KERN_INFO "binder: %d:%d BC_REGISTER_LOOPER\n",
+                                      proc->pid, thread->pid);
+                       if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
+                               thread->looper |= BINDER_LOOPER_STATE_INVALID;
+                               binder_user_error("binder: %d:%d ERROR:"
+                                       " BC_REGISTER_LOOPER called "
+                                       "after BC_ENTER_LOOPER\n",
+                                       proc->pid, thread->pid);
+                       } else if (proc->requested_threads == 0) {
+                               thread->looper |= BINDER_LOOPER_STATE_INVALID;
+                               binder_user_error("binder: %d:%d ERROR:"
+                                       " BC_REGISTER_LOOPER called "
+                                       "without request\n",
+                                       proc->pid, thread->pid);
+                       } else {
+                               proc->requested_threads--;
+                               proc->requested_threads_started++;
+                       }
+                       thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
+                       break;
+               case BC_ENTER_LOOPER:
+                       if (binder_debug_mask & BINDER_DEBUG_THREADS)
+                               printk(KERN_INFO "binder: %d:%d BC_ENTER_LOOPER\n",
+                                      proc->pid, thread->pid);
+                       if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
+                               thread->looper |= BINDER_LOOPER_STATE_INVALID;
+                               binder_user_error("binder: %d:%d ERROR:"
+                                       " BC_ENTER_LOOPER called after "
+                                       "BC_REGISTER_LOOPER\n",
+                                       proc->pid, thread->pid);
+                       }
+                       thread->looper |= BINDER_LOOPER_STATE_ENTERED;
+                       break;
+               case BC_EXIT_LOOPER:
+                       if (binder_debug_mask & BINDER_DEBUG_THREADS)
+                               printk(KERN_INFO "binder: %d:%d BC_EXIT_LOOPER\n",
+                                      proc->pid, thread->pid);
+                       thread->looper |= BINDER_LOOPER_STATE_EXITED;
+                       break;
+
+               case BC_REQUEST_DEATH_NOTIFICATION:
+               case BC_CLEAR_DEATH_NOTIFICATION: {
+                       uint32_t target;
+                       void __user *cookie;
+                       struct binder_ref *ref;
+                       struct binder_ref_death *death;
+
+                       if (get_user(target, (uint32_t __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(uint32_t);
+                       if (get_user(cookie, (void __user * __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(void *);
+                       ref = binder_get_ref(proc, target);
+                       if (ref == NULL) {
+                               binder_user_error("binder: %d:%d %s "
+                                       "invalid ref %d\n",
+                                       proc->pid, thread->pid,
+                                       cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+                                       "BC_REQUEST_DEATH_NOTIFICATION" :
+                                       "BC_CLEAR_DEATH_NOTIFICATION",
+                                       target);
+                               break;
+                       }
+
+                       if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION)
+                               printk(KERN_INFO "binder: %d:%d %s %p ref %d desc %d s %d w %d for node %d\n",
+                                      proc->pid, thread->pid,
+                                      cmd == BC_REQUEST_DEATH_NOTIFICATION ?
+                                      "BC_REQUEST_DEATH_NOTIFICATION" :
+                                      "BC_CLEAR_DEATH_NOTIFICATION",
+                                      cookie, ref->debug_id, ref->desc,
+                                      ref->strong, ref->weak, ref->node->debug_id);
+
+                       if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
+                               if (ref->death) {
+                                       binder_user_error("binder: %d:%"
+                                               "d BC_REQUEST_DEATH_NOTI"
+                                               "FICATION death notific"
+                                               "ation already set\n",
+                                               proc->pid, thread->pid);
+                                       break;
+                               }
+                               death = kzalloc(sizeof(*death), GFP_KERNEL);
+                               if (death == NULL) {
+                                       thread->return_error = BR_ERROR;
+                                       if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION)
+                                               printk(KERN_INFO "binder: %d:%d "
+                                                       "BC_REQUEST_DEATH_NOTIFICATION failed\n",
+                                                       proc->pid, thread->pid);
+                                       break;
+                               }
+                               binder_stats.obj_created[BINDER_STAT_DEATH]++;
+                               INIT_LIST_HEAD(&death->work.entry);
+                               death->cookie = cookie;
+                               ref->death = death;
+                               if (ref->node->proc == NULL) {
+                                       ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+                                       if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+                                               list_add_tail(&ref->death->work.entry, &thread->todo);
+                                       } else {
+                                               list_add_tail(&ref->death->work.entry, &proc->todo);
+                                               wake_up_interruptible(&proc->wait);
+                                       }
+                               }
+                       } else {
+                               if (ref->death == NULL) {
+                                       binder_user_error("binder: %d:%"
+                                               "d BC_CLEAR_DEATH_NOTIFI"
+                                               "CATION death notificat"
+                                               "ion not active\n",
+                                               proc->pid, thread->pid);
+                                       break;
+                               }
+                               death = ref->death;
+                               if (death->cookie != cookie) {
+                                       binder_user_error("binder: %d:%"
+                                               "d BC_CLEAR_DEATH_NOTIFI"
+                                               "CATION death notificat"
+                                               "ion cookie mismatch "
+                                               "%p != %p\n",
+                                               proc->pid, thread->pid,
+                                               death->cookie, cookie);
+                                       break;
+                               }
+                               ref->death = NULL;
+                               if (list_empty(&death->work.entry)) {
+                                       death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+                                       if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+                                               list_add_tail(&death->work.entry, &thread->todo);
+                                       } else {
+                                               list_add_tail(&death->work.entry, &proc->todo);
+                                               wake_up_interruptible(&proc->wait);
+                                       }
+                               } else {
+                                       BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
+                                       death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
+                               }
+                       }
+               } break;
+               case BC_DEAD_BINDER_DONE: {
+                       struct binder_work *w;
+                       void __user *cookie;
+                       struct binder_ref_death *death = NULL;
+                       if (get_user(cookie, (void __user * __user *)ptr))
+                               return -EFAULT;
+
+                       ptr += sizeof(void *);
+                       list_for_each_entry(w, &proc->delivered_death, entry) {
+                               struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
+                               if (tmp_death->cookie == cookie) {
+                                       death = tmp_death;
+                                       break;
+                               }
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                               printk(KERN_INFO "binder: %d:%d BC_DEAD_BINDER_DONE %p found %p\n",
+                                      proc->pid, thread->pid, cookie, death);
+                       if (death == NULL) {
+                               binder_user_error("binder: %d:%d BC_DEAD"
+                                       "_BINDER_DONE %p not found\n",
+                                       proc->pid, thread->pid, cookie);
+                               break;
+                       }
+
+                       list_del_init(&death->work.entry);
+                       if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
+                               death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
+                               if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
+                                       list_add_tail(&death->work.entry, &thread->todo);
+                               } else {
+                                       list_add_tail(&death->work.entry, &proc->todo);
+                                       wake_up_interruptible(&proc->wait);
+                               }
+                       }
+               } break;
+
+               default:
+                       printk(KERN_ERR "binder: %d:%d unknown command %d\n", proc->pid, thread->pid, cmd);
+                       return -EINVAL;
+               }
+               *consumed = ptr - buffer;
+       }
+       return 0;
+}
+
+void
+binder_stat_br(struct binder_proc *proc, struct binder_thread *thread, uint32_t cmd)
+{
+       if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
+               binder_stats.br[_IOC_NR(cmd)]++;
+               proc->stats.br[_IOC_NR(cmd)]++;
+               thread->stats.br[_IOC_NR(cmd)]++;
+       }
+}
+
+static int
+binder_has_proc_work(struct binder_proc *proc, struct binder_thread *thread)
+{
+       return !list_empty(&proc->todo) || (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int
+binder_has_thread_work(struct binder_thread *thread)
+{
+       return !list_empty(&thread->todo) || thread->return_error != BR_OK ||
+               (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN);
+}
+
+static int
+binder_thread_read(struct binder_proc *proc, struct binder_thread *thread,
+       void  __user *buffer, int size, signed long *consumed, int non_block)
+{
+       void __user *ptr = buffer + *consumed;
+       void __user *end = buffer + size;
+
+       int ret = 0;
+       int wait_for_proc_work;
+
+       if (*consumed == 0) {
+               if (put_user(BR_NOOP, (uint32_t __user *)ptr))
+                       return -EFAULT;
+               ptr += sizeof(uint32_t);
+       }
+
+retry:
+       wait_for_proc_work = thread->transaction_stack == NULL && list_empty(&thread->todo);
+
+       if (thread->return_error != BR_OK && ptr < end) {
+               if (thread->return_error2 != BR_OK) {
+                       if (put_user(thread->return_error2, (uint32_t __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(uint32_t);
+                       if (ptr == end)
+                               goto done;
+                       thread->return_error2 = BR_OK;
+               }
+               if (put_user(thread->return_error, (uint32_t __user *)ptr))
+                       return -EFAULT;
+               ptr += sizeof(uint32_t);
+               thread->return_error = BR_OK;
+               goto done;
+       }
+
+
+       thread->looper |= BINDER_LOOPER_STATE_WAITING;
+       if (wait_for_proc_work)
+               proc->ready_threads++;
+       mutex_unlock(&binder_lock);
+       if (wait_for_proc_work) {
+               if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+                                       BINDER_LOOPER_STATE_ENTERED))) {
+                       binder_user_error("binder: %d:%d ERROR: Thread waiting "
+                               "for process work before calling BC_REGISTER_"
+                               "LOOPER or BC_ENTER_LOOPER (state %x)\n",
+                               proc->pid, thread->pid, thread->looper);
+                       wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+               }
+               binder_set_nice(proc->default_priority);
+               if (non_block) {
+                       if (!binder_has_proc_work(proc, thread))
+                               ret = -EAGAIN;
+               } else
+                       ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread));
+       } else {
+               if (non_block) {
+                       if (!binder_has_thread_work(thread))
+                               ret = -EAGAIN;
+               } else
+                       ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread));
+       }
+       mutex_lock(&binder_lock);
+       if (wait_for_proc_work)
+               proc->ready_threads--;
+       thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
+
+       if (ret)
+               return ret;
+
+       while (1) {
+               uint32_t cmd;
+               struct binder_transaction_data tr;
+               struct binder_work *w;
+               struct binder_transaction *t = NULL;
+
+               if (!list_empty(&thread->todo))
+                       w = list_first_entry(&thread->todo, struct binder_work, entry);
+               else if (!list_empty(&proc->todo) && wait_for_proc_work)
+                       w = list_first_entry(&proc->todo, struct binder_work, entry);
+               else {
+                       if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */
+                               goto retry;
+                       break;
+               }
+
+               if (end - ptr < sizeof(tr) + 4)
+                       break;
+
+               switch (w->type) {
+               case BINDER_WORK_TRANSACTION: {
+                       t = container_of(w, struct binder_transaction, work);
+               } break;
+               case BINDER_WORK_TRANSACTION_COMPLETE: {
+                       cmd = BR_TRANSACTION_COMPLETE;
+                       if (put_user(cmd, (uint32_t __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(uint32_t);
+
+                       binder_stat_br(proc, thread, cmd);
+                       if (binder_debug_mask & BINDER_DEBUG_TRANSACTION_COMPLETE)
+                               printk(KERN_INFO "binder: %d:%d BR_TRANSACTION_COMPLETE\n",
+                                      proc->pid, thread->pid);
+
+                       list_del(&w->entry);
+                       kfree(w);
+                       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+               } break;
+               case BINDER_WORK_NODE: {
+                       struct binder_node *node = container_of(w, struct binder_node, work);
+                       uint32_t cmd = BR_NOOP;
+                       const char *cmd_name;
+                       int strong = node->internal_strong_refs || node->local_strong_refs;
+                       int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
+                       if (weak && !node->has_weak_ref) {
+                               cmd = BR_INCREFS;
+                               cmd_name = "BR_INCREFS";
+                               node->has_weak_ref = 1;
+                               node->pending_weak_ref = 1;
+                               node->local_weak_refs++;
+                       } else if (strong && !node->has_strong_ref) {
+                               cmd = BR_ACQUIRE;
+                               cmd_name = "BR_ACQUIRE";
+                               node->has_strong_ref = 1;
+                               node->pending_strong_ref = 1;
+                               node->local_strong_refs++;
+                       } else if (!strong && node->has_strong_ref) {
+                               cmd = BR_RELEASE;
+                               cmd_name = "BR_RELEASE";
+                               node->has_strong_ref = 0;
+                       } else if (!weak && node->has_weak_ref) {
+                               cmd = BR_DECREFS;
+                               cmd_name = "BR_DECREFS";
+                               node->has_weak_ref = 0;
+                       }
+                       if (cmd != BR_NOOP) {
+                               if (put_user(cmd, (uint32_t __user *)ptr))
+                                       return -EFAULT;
+                               ptr += sizeof(uint32_t);
+                               if (put_user(node->ptr, (void * __user *)ptr))
+                                       return -EFAULT;
+                               ptr += sizeof(void *);
+                               if (put_user(node->cookie, (void * __user *)ptr))
+                                       return -EFAULT;
+                               ptr += sizeof(void *);
+
+                               binder_stat_br(proc, thread, cmd);
+                               if (binder_debug_mask & BINDER_DEBUG_USER_REFS)
+                                       printk(KERN_INFO "binder: %d:%d %s %d u%p c%p\n",
+                                              proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie);
+                       } else {
+                               list_del_init(&w->entry);
+                               if (!weak && !strong) {
+                                       if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                                               printk(KERN_INFO "binder: %d:%d node %d u%p c%p deleted\n",
+                                                      proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie);
+                                       rb_erase(&node->rb_node, &proc->nodes);
+                                       kfree(node);
+                                       binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+                               } else {
+                                       if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS)
+                                               printk(KERN_INFO "binder: %d:%d node %d u%p c%p state unchanged\n",
+                                                      proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie);
+                               }
+                       }
+               } break;
+               case BINDER_WORK_DEAD_BINDER:
+               case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+               case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
+                       struct binder_ref_death *death = container_of(w, struct binder_ref_death, work);
+                       uint32_t cmd;
+                       if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
+                               cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
+                       else
+                               cmd = BR_DEAD_BINDER;
+                       if (put_user(cmd, (uint32_t __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(uint32_t);
+                       if (put_user(death->cookie, (void * __user *)ptr))
+                               return -EFAULT;
+                       ptr += sizeof(void *);
+                       if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION)
+                               printk(KERN_INFO "binder: %d:%d %s %p\n",
+                                      proc->pid, thread->pid,
+                                      cmd == BR_DEAD_BINDER ?
+                                      "BR_DEAD_BINDER" :
+                                      "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+                                      death->cookie);
+
+                       if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
+                               list_del(&w->entry);
+                               kfree(death);
+                               binder_stats.obj_deleted[BINDER_STAT_DEATH]++;
+                       } else
+                               list_move(&w->entry, &proc->delivered_death);
+                       if (cmd == BR_DEAD_BINDER)
+                               goto done; /* DEAD_BINDER notifications can cause transactions */
+               } break;
+               }
+
+               if (!t)
+                       continue;
+
+               BUG_ON(t->buffer == NULL);
+               if (t->buffer->target_node) {
+                       struct binder_node *target_node = t->buffer->target_node;
+                       tr.target.ptr = target_node->ptr;
+                       tr.cookie =  target_node->cookie;
+                       t->saved_priority = task_nice(current);
+                       if (t->priority < target_node->min_priority &&
+                           !(t->flags & TF_ONE_WAY))
+                               binder_set_nice(t->priority);
+                       else if (!(t->flags & TF_ONE_WAY) ||
+                                t->saved_priority > target_node->min_priority)
+                               binder_set_nice(target_node->min_priority);
+                       cmd = BR_TRANSACTION;
+               } else {
+                       tr.target.ptr = NULL;
+                       tr.cookie = NULL;
+                       cmd = BR_REPLY;
+               }
+               tr.code = t->code;
+               tr.flags = t->flags;
+               tr.sender_euid = t->sender_euid;
+
+               if (t->from) {
+                       struct task_struct *sender = t->from->proc->tsk;
+                       tr.sender_pid = task_tgid_nr_ns(sender, current->nsproxy->pid_ns);
+               } else {
+                       tr.sender_pid = 0;
+               }
+
+               tr.data_size = t->buffer->data_size;
+               tr.offsets_size = t->buffer->offsets_size;
+               tr.data.ptr.buffer = (void *)((void *)t->buffer->data + proc->user_buffer_offset);
+               tr.data.ptr.offsets = tr.data.ptr.buffer + ALIGN(t->buffer->data_size, sizeof(void *));
+
+               if (put_user(cmd, (uint32_t __user *)ptr))
+                       return -EFAULT;
+               ptr += sizeof(uint32_t);
+               if (copy_to_user(ptr, &tr, sizeof(tr)))
+                       return -EFAULT;
+               ptr += sizeof(tr);
+
+               binder_stat_br(proc, thread, cmd);
+               if (binder_debug_mask & BINDER_DEBUG_TRANSACTION)
+                       printk(KERN_INFO "binder: %d:%d %s %d %d:%d, cmd %d size %d-%d ptr %p-%p\n",
+                              proc->pid, thread->pid,
+                              (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : "BR_REPLY",
+                              t->debug_id, t->from ? t->from->proc->pid : 0,
+                              t->from ? t->from->pid : 0, cmd,
+                              t->buffer->data_size, t->buffer->offsets_size,
+                              tr.data.ptr.buffer, tr.data.ptr.offsets);
+
+               list_del(&t->work.entry);
+               t->buffer->allow_user_free = 1;
+               if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
+                       t->to_parent = thread->transaction_stack;
+                       t->to_thread = thread;
+                       thread->transaction_stack = t;
+               } else {
+                       t->buffer->transaction = NULL;
+                       kfree(t);
+                       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++;
+               }
+               break;
+       }
+
+done:
+
+       *consumed = ptr - buffer;
+       if (proc->requested_threads + proc->ready_threads == 0 &&
+           proc->requested_threads_started < proc->max_threads &&
+           (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
+            BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
+            /*spawn a new thread if we leave this out */) {
+               proc->requested_threads++;
+               if (binder_debug_mask & BINDER_DEBUG_THREADS)
+                       printk(KERN_INFO "binder: %d:%d BR_SPAWN_LOOPER\n",
+                              proc->pid, thread->pid);
+               if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
+                       return -EFAULT;
+       }
+       return 0;
+}
+
+static void binder_release_work(struct list_head *list)
+{
+       struct binder_work *w;
+       while (!list_empty(list)) {
+               w = list_first_entry(list, struct binder_work, entry);
+               list_del_init(&w->entry);
+               switch (w->type) {
+               case BINDER_WORK_TRANSACTION: {
+                       struct binder_transaction *t = container_of(w, struct binder_transaction, work);
+                       if (t->buffer->target_node && !(t->flags & TF_ONE_WAY))
+                               binder_send_failed_reply(t, BR_DEAD_REPLY);
+               } break;
+               case BINDER_WORK_TRANSACTION_COMPLETE: {
+                       kfree(w);
+                       binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++;
+               } break;
+               default:
+                       break;
+               }
+       }
+
+}
+
+static struct binder_thread *binder_get_thread(struct binder_proc *proc)
+{
+       struct binder_thread *thread = NULL;
+       struct rb_node *parent = NULL;
+       struct rb_node **p = &proc->threads.rb_node;
+
+       while (*p) {
+               parent = *p;
+               thread = rb_entry(parent, struct binder_thread, rb_node);
+
+               if (current->pid < thread->pid)
+                       p = &(*p)->rb_left;
+               else if (current->pid > thread->pid)
+                       p = &(*p)->rb_right;
+               else
+                       break;
+       }
+       if (*p == NULL) {
+               thread = kzalloc(sizeof(*thread), GFP_KERNEL);
+               if (thread == NULL)
+                       return NULL;
+               binder_stats.obj_created[BINDER_STAT_THREAD]++;
+               thread->proc = proc;
+               thread->pid = current->pid;
+               init_waitqueue_head(&thread->wait);
+               INIT_LIST_HEAD(&thread->todo);
+               rb_link_node(&thread->rb_node, parent, p);
+               rb_insert_color(&thread->rb_node, &proc->threads);
+               thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+               thread->return_error = BR_OK;
+               thread->return_error2 = BR_OK;
+       }
+       return thread;
+}
+
+static int binder_free_thread(struct binder_proc *proc, struct binder_thread *thread)
+{
+       struct binder_transaction *t;
+       struct binder_transaction *send_reply = NULL;
+       int active_transactions = 0;
+
+       rb_erase(&thread->rb_node, &proc->threads);
+       t = thread->transaction_stack;
+       if (t && t->to_thread == thread)
+               send_reply = t;
+       while (t) {
+               active_transactions++;
+               if (binder_debug_mask & BINDER_DEBUG_DEAD_TRANSACTION)
+                       printk(KERN_INFO "binder: release %d:%d transaction %d %s, still active\n",
+                              proc->pid, thread->pid, t->debug_id, (t->to_thread == thread) ? "in" : "out");
+               if (t->to_thread == thread) {
+                       t->to_proc = NULL;
+                       t->to_thread = NULL;
+                       if (t->buffer) {
+                               t->buffer->transaction = NULL;
+                               t->buffer = NULL;
+                       }
+                       t = t->to_parent;
+               } else if (t->from == thread) {
+                       t->from = NULL;
+                       t = t->from_parent;
+               } else
+                       BUG();
+       }
+       if (send_reply)
+               binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
+       binder_release_work(&thread->todo);
+       kfree(thread);
+       binder_stats.obj_deleted[BINDER_STAT_THREAD]++;
+       return active_transactions;
+}
+
+static unsigned int binder_poll(struct file *filp, struct poll_table_struct *wait)
+{
+       struct binder_proc *proc = filp->private_data;
+       struct binder_thread *thread = NULL;
+       int wait_for_proc_work;
+
+       mutex_lock(&binder_lock);
+       thread = binder_get_thread(proc);
+
+       wait_for_proc_work = thread->transaction_stack == NULL &&
+               list_empty(&thread->todo) && thread->return_error == BR_OK;
+       mutex_unlock(&binder_lock);
+
+       if (wait_for_proc_work) {
+               if (binder_has_proc_work(proc, thread))
+                       return POLLIN;
+               poll_wait(filp, &proc->wait, wait);
+               if (binder_has_proc_work(proc, thread))
+                       return POLLIN;
+       } else {
+               if (binder_has_thread_work(thread))
+                       return POLLIN;
+               poll_wait(filp, &thread->wait, wait);
+               if (binder_has_thread_work(thread))
+                       return POLLIN;
+       }
+       return 0;
+}
+
+static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+       int ret;
+       struct binder_proc *proc = filp->private_data;
+       struct binder_thread *thread;
+       unsigned int size = _IOC_SIZE(cmd);
+       void __user *ubuf = (void __user *)arg;
+
+       /*printk(KERN_INFO "binder_ioctl: %d:%d %x %lx\n", proc->pid, current->pid, cmd, arg);*/
+
+       ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+       if (ret)
+               return ret;
+
+       mutex_lock(&binder_lock);
+       thread = binder_get_thread(proc);
+       if (thread == NULL) {
+               ret = -ENOMEM;
+               goto err;
+       }
+
+       switch (cmd) {
+       case BINDER_WRITE_READ: {
+               struct binder_write_read bwr;
+               if (size != sizeof(struct binder_write_read)) {
+                       ret = -EINVAL;
+                       goto err;
+               }
+               if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
+                       ret = -EFAULT;
+                       goto err;
+               }
+               if (binder_debug_mask & BINDER_DEBUG_READ_WRITE)
+                       printk(KERN_INFO "binder: %d:%d write %ld at %08lx, read %ld at %08lx\n",
+                              proc->pid, thread->pid, bwr.write_size, bwr.write_buffer, bwr.read_size, bwr.read_buffer);
+               if (bwr.write_size > 0) {
+                       ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed);
+                       if (ret < 0) {
+                               bwr.read_consumed = 0;
+                               if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+                                       ret = -EFAULT;
+                               goto err;
+                       }
+               }
+               if (bwr.read_size > 0) {
+                       ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK);
+                       if (!list_empty(&proc->todo))
+                               wake_up_interruptible(&proc->wait);
+                       if (ret < 0) {
+                               if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
+                                       ret = -EFAULT;
+                               goto err;
+                       }
+               }
+               if (binder_debug_mask & BINDER_DEBUG_READ_WRITE)
+                       printk(KERN_INFO "binder: %d:%d wrote %ld of %ld, read return %ld of %ld\n",
+                              proc->pid, thread->pid, bwr.write_consumed, bwr.write_size, bwr.read_consumed, bwr.read_size);
+               if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
+                       ret = -EFAULT;
+                       goto err;
+               }
+               break;
+       }
+       case BINDER_SET_MAX_THREADS:
+               if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
+                       ret = -EINVAL;
+                       goto err;
+               }
+               break;
+       case BINDER_SET_CONTEXT_MGR:
+               if (binder_context_mgr_node != NULL) {
+                       printk(KERN_ERR "binder: BINDER_SET_CONTEXT_MGR already set\n");
+                       ret = -EBUSY;
+                       goto err;
+               }
+               if (binder_context_mgr_uid != -1) {
+                       if (binder_context_mgr_uid != current->euid) {
+                               printk(KERN_ERR "binder: BINDER_SET_"
+                                      "CONTEXT_MGR bad uid %d != %d\n",
+                                      current->euid,
+                                      binder_context_mgr_uid);
+                               ret = -EPERM;
+                               goto err;
+                       }
+               } else
+                       binder_context_mgr_uid = current->euid;
+               binder_context_mgr_node = binder_new_node(proc, NULL, NULL);
+               if (binder_context_mgr_node == NULL) {
+                       ret = -ENOMEM;
+                       goto err;
+               }
+               binder_context_mgr_node->local_weak_refs++;
+               binder_context_mgr_node->local_strong_refs++;
+               binder_context_mgr_node->has_strong_ref = 1;
+               binder_context_mgr_node->has_weak_ref = 1;
+               break;
+       case BINDER_THREAD_EXIT:
+               if (binder_debug_mask & BINDER_DEBUG_THREADS)
+                       printk(KERN_INFO "binder: %d:%d exit\n",
+                              proc->pid, thread->pid);
+               binder_free_thread(proc, thread);
+               thread = NULL;
+               break;
+       case BINDER_VERSION:
+               if (size != sizeof(struct binder_version)) {
+                       ret = -EINVAL;
+                       goto err;
+               }
+               if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) {
+                       ret = -EINVAL;
+                       goto err;
+               }
+               break;
+       default:
+               ret = -EINVAL;
+               goto err;
+       }
+       ret = 0;
+err:
+       if (thread)
+               thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
+       mutex_unlock(&binder_lock);
+       wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
+       if (ret && ret != -ERESTARTSYS)
+               printk(KERN_INFO "binder: %d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
+       return ret;
+}
+
+static void binder_vma_open(struct vm_area_struct *vma)
+{
+       struct binder_proc *proc = vma->vm_private_data;
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder: %d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot);
+       dump_stack();
+}
+static void binder_vma_close(struct vm_area_struct *vma)
+{
+       struct binder_proc *proc = vma->vm_private_data;
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder: %d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot);
+       proc->vma = NULL;
+}
+
+static struct vm_operations_struct binder_vm_ops = {
+       .open = binder_vma_open,
+       .close = binder_vma_close,
+};
+
+static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+       int ret;
+       struct vm_struct *area;
+       struct binder_proc *proc = filp->private_data;
+       const char *failure_string;
+       struct binder_buffer *buffer;
+
+       if ((vma->vm_end - vma->vm_start) > SZ_4M)
+               vma->vm_end = vma->vm_start + SZ_4M;
+
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot);
+
+       if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
+               ret = -EPERM;
+               failure_string = "bad vm_flags";
+               goto err_bad_arg;
+       }
+       vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE;
+
+       area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP);
+       if (area == NULL) {
+               ret = -ENOMEM;
+               failure_string = "get_vm_area";
+               goto err_get_vm_area_failed;
+       }
+       proc->buffer = area->addr;
+       proc->user_buffer_offset = vma->vm_start - (size_t)proc->buffer;
+
+#ifdef CONFIG_CPU_CACHE_VIPT
+       if (cache_is_vipt_aliasing()) {
+               while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) {
+                       printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);
+                       vma->vm_start += PAGE_SIZE;
+               }
+       }
+#endif
+       proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL);
+       if (proc->pages == NULL) {
+               ret = -ENOMEM;
+               failure_string = "alloc page array";
+               goto err_alloc_pages_failed;
+       }
+       proc->buffer_size = vma->vm_end - vma->vm_start;
+
+       vma->vm_ops = &binder_vm_ops;
+       vma->vm_private_data = proc;
+
+       if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) {
+               ret = -ENOMEM;
+               failure_string = "alloc small buf";
+               goto err_alloc_small_buf_failed;
+       }
+       buffer = proc->buffer;
+       INIT_LIST_HEAD(&proc->buffers);
+       list_add(&buffer->entry, &proc->buffers);
+       buffer->free = 1;
+       binder_insert_free_buffer(proc, buffer);
+       proc->free_async_space = proc->buffer_size / 2;
+       barrier();
+       proc->vma = vma;
+
+       /*printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/
+       return 0;
+
+err_alloc_small_buf_failed:
+       kfree(proc->pages);
+err_alloc_pages_failed:
+       vfree(proc->buffer);
+err_get_vm_area_failed:
+       mutex_unlock(&binder_lock);
+err_bad_arg:
+       printk(KERN_ERR "binder_mmap: %d %lx-%lx %s failed %d\n", proc->pid, vma->vm_start, vma->vm_end, failure_string, ret);
+       return ret;
+}
+
+static int binder_open(struct inode *nodp, struct file *filp)
+{
+       struct binder_proc *proc;
+
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder_open: %d:%d\n", current->group_leader->pid, current->pid);
+
+       proc = kzalloc(sizeof(*proc), GFP_KERNEL);
+       if (proc == NULL)
+               return -ENOMEM;
+       get_task_struct(current);
+       proc->tsk = current;
+       INIT_LIST_HEAD(&proc->todo);
+       init_waitqueue_head(&proc->wait);
+       proc->default_priority = task_nice(current);
+       mutex_lock(&binder_lock);
+       binder_stats.obj_created[BINDER_STAT_PROC]++;
+       hlist_add_head(&proc->proc_node, &binder_procs);
+       proc->pid = current->group_leader->pid;
+       INIT_LIST_HEAD(&proc->delivered_death);
+       filp->private_data = proc;
+       mutex_unlock(&binder_lock);
+
+       if (binder_proc_dir_entry_proc) {
+               char strbuf[11];
+               snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+               create_proc_read_entry(strbuf, S_IRUGO, binder_proc_dir_entry_proc, binder_read_proc_proc, proc);
+       }
+
+       return 0;
+}
+
+static int binder_flush(struct file *filp, fl_owner_t id)
+{
+       struct rb_node *n;
+       struct binder_proc *proc = filp->private_data;
+       int wake_count = 0;
+
+       mutex_lock(&binder_lock);
+       for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
+               struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
+               thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN;
+               if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
+                       wake_up_interruptible(&thread->wait);
+                       wake_count++;
+               }
+       }
+       wake_up_interruptible_all(&proc->wait);
+       mutex_unlock(&binder_lock);
+
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder_flush: %d woke %d threads\n", proc->pid, wake_count);
+
+       return 0;
+}
+
+static int binder_release(struct inode *nodp, struct file *filp)
+{
+       struct hlist_node *pos;
+       struct binder_transaction *t;
+       struct rb_node *n;
+       struct binder_proc *proc = filp->private_data;
+       int threads, nodes, incoming_refs, outgoing_refs, buffers, active_transactions, page_count;
+
+       if (binder_proc_dir_entry_proc) {
+               char strbuf[11];
+               snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+               remove_proc_entry(strbuf, binder_proc_dir_entry_proc);
+       }
+       mutex_lock(&binder_lock);
+       hlist_del(&proc->proc_node);
+       if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
+               if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                       printk(KERN_INFO "binder_release: %d context_mgr_node gone\n", proc->pid);
+               binder_context_mgr_node = NULL;
+       }
+
+       threads = 0;
+       active_transactions = 0;
+       while ((n = rb_first(&proc->threads))) {
+               struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
+               threads++;
+               active_transactions += binder_free_thread(proc, thread);
+       }
+       nodes = 0;
+       incoming_refs = 0;
+       while ((n = rb_first(&proc->nodes))) {
+               struct binder_node *node = rb_entry(n, struct binder_node, rb_node);
+
+               nodes++;
+               rb_erase(&node->rb_node, &proc->nodes);
+               list_del_init(&node->work.entry);
+               if (hlist_empty(&node->refs)) {
+                       kfree(node);
+                       binder_stats.obj_deleted[BINDER_STAT_NODE]++;
+               } else {
+                       struct binder_ref *ref;
+                       int death = 0;
+
+                       node->proc = NULL;
+                       node->local_strong_refs = 0;
+                       node->local_weak_refs = 0;
+                       hlist_add_head(&node->dead_node, &binder_dead_nodes);
+
+                       hlist_for_each_entry(ref, pos, &node->refs, node_entry) {
+                               incoming_refs++;
+                               if (ref->death) {
+                                       death++;
+                                       if (list_empty(&ref->death->work.entry)) {
+                                               ref->death->work.type = BINDER_WORK_DEAD_BINDER;
+                                               list_add_tail(&ref->death->work.entry, &ref->proc->todo);
+                                               wake_up_interruptible(&ref->proc->wait);
+                                       } else
+                                               BUG();
+                               }
+                       }
+                       if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER)
+                               printk(KERN_INFO "binder: node %d now dead, refs %d, death %d\n", node->debug_id, incoming_refs, death);
+               }
+       }
+       outgoing_refs = 0;
+       while ((n = rb_first(&proc->refs_by_desc))) {
+               struct binder_ref *ref = rb_entry(n, struct binder_ref, rb_node_desc);
+               outgoing_refs++;
+               binder_delete_ref(ref);
+       }
+       binder_release_work(&proc->todo);
+       buffers = 0;
+
+       while ((n = rb_first(&proc->allocated_buffers))) {
+               struct binder_buffer *buffer = rb_entry(n, struct binder_buffer, rb_node);
+               t = buffer->transaction;
+               if (t) {
+                       t->buffer = NULL;
+                       buffer->transaction = NULL;
+                       printk(KERN_ERR "binder: release proc %d, transaction %d, not freed\n", proc->pid, t->debug_id);
+                       /*BUG();*/
+               }
+               binder_free_buf(proc, buffer);
+               buffers++;
+       }
+
+       binder_stats.obj_deleted[BINDER_STAT_PROC]++;
+       mutex_unlock(&binder_lock);
+
+       page_count = 0;
+       if (proc->pages) {
+               int i;
+               for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
+                       if (proc->pages[i]) {
+                               if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC)
+                                       printk(KERN_INFO "binder_release: %d: page %d at %p not freed\n", proc->pid, i, proc->buffer + i * PAGE_SIZE);
+                               __free_page(proc->pages[i]);
+                               page_count++;
+                       }
+               }
+               kfree(proc->pages);
+               vfree(proc->buffer);
+       }
+
+       put_task_struct(proc->tsk);
+
+       if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE)
+               printk(KERN_INFO "binder_release: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n",
+                      proc->pid, threads, nodes, incoming_refs, outgoing_refs, active_transactions, buffers, page_count);
+
+       kfree(proc);
+       return 0;
+}
+
+static char *print_binder_transaction(char *buf, char *end, const char *prefix, struct binder_transaction *t)
+{
+       buf += snprintf(buf, end - buf, "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d",
+                       prefix, t->debug_id, t, t->from ? t->from->proc->pid : 0,
+                       t->from ? t->from->pid : 0,
+                       t->to_proc ? t->to_proc->pid : 0,
+                       t->to_thread ? t->to_thread->pid : 0,
+                       t->code, t->flags, t->priority, t->need_reply);
+       if (buf >= end)
+               return buf;
+       if (t->buffer == NULL) {
+               buf += snprintf(buf, end - buf, " buffer free\n");
+               return buf;
+       }
+       if (t->buffer->target_node) {
+               buf += snprintf(buf, end - buf, " node %d",
+                               t->buffer->target_node->debug_id);
+               if (buf >= end)
+                       return buf;
+       }
+       buf += snprintf(buf, end - buf, " size %d:%d data %p\n",
+                       t->buffer->data_size, t->buffer->offsets_size,
+                       t->buffer->data);
+       return buf;
+}
+
+static char *print_binder_buffer(char *buf, char *end, const char *prefix, struct binder_buffer *buffer)
+{
+       buf += snprintf(buf, end - buf, "%s %d: %p size %d:%d %s\n",
+                       prefix, buffer->debug_id, buffer->data,
+                       buffer->data_size, buffer->offsets_size,
+                       buffer->transaction ? "active" : "delivered");
+       return buf;
+}
+
+static char *print_binder_work(char *buf, char *end, const char *prefix,
+       const char *transaction_prefix, struct binder_work *w)
+{
+       struct binder_node *node;
+       struct binder_transaction *t;
+
+       switch (w->type) {
+       case BINDER_WORK_TRANSACTION:
+               t = container_of(w, struct binder_transaction, work);
+               buf = print_binder_transaction(buf, end, transaction_prefix, t);
+               break;
+       case BINDER_WORK_TRANSACTION_COMPLETE:
+               buf += snprintf(buf, end - buf,
+                               "%stransaction complete\n", prefix);
+               break;
+       case BINDER_WORK_NODE:
+               node = container_of(w, struct binder_node, work);
+               buf += snprintf(buf, end - buf, "%snode work %d: u%p c%p\n",
+                               prefix, node->debug_id, node->ptr, node->cookie);
+               break;
+       case BINDER_WORK_DEAD_BINDER:
+               buf += snprintf(buf, end - buf, "%shas dead binder\n", prefix);
+               break;
+       case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
+               buf += snprintf(buf, end - buf,
+                               "%shas cleared dead binder\n", prefix);
+               break;
+       case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
+               buf += snprintf(buf, end - buf,
+                               "%shas cleared death notification\n", prefix);
+               break;
+       default:
+               buf += snprintf(buf, end - buf, "%sunknown work: type %d\n",
+                               prefix, w->type);
+               break;
+       }
+       return buf;
+}
+
+static char *print_binder_thread(char *buf, char *end, struct binder_thread *thread, int print_always)
+{
+       struct binder_transaction *t;
+       struct binder_work *w;
+       char *start_buf = buf;
+       char *header_buf;
+
+       buf += snprintf(buf, end - buf, "  thread %d: l %02x\n", thread->pid, thread->looper);
+       header_buf = buf;
+       t = thread->transaction_stack;
+       while (t) {
+               if (buf >= end)
+                       break;
+               if (t->from == thread) {
+                       buf = print_binder_transaction(buf, end, "    outgoing transaction", t);
+                       t = t->from_parent;
+               } else if (t->to_thread == thread) {
+                       buf = print_binder_transaction(buf, end, "    incoming transaction", t);
+                       t = t->to_parent;
+               } else {
+                       buf = print_binder_transaction(buf, end, "    bad transaction", t);
+                       t = NULL;
+               }
+       }
+       list_for_each_entry(w, &thread->todo, entry) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_work(buf, end, "    ",
+                                       "    pending transaction", w);
+       }
+       if (!print_always && buf == header_buf)
+               buf = start_buf;
+       return buf;
+}
+
+static char *print_binder_node(char *buf, char *end, struct binder_node *node)
+{
+       struct binder_ref *ref;
+       struct hlist_node *pos;
+       struct binder_work *w;
+       int count;
+       count = 0;
+       hlist_for_each_entry(ref, pos, &node->refs, node_entry)
+               count++;
+
+       buf += snprintf(buf, end - buf, "  node %d: u%p c%p hs %d hw %d ls %d lw %d is %d iw %d",
+                       node->debug_id, node->ptr, node->cookie,
+                       node->has_strong_ref, node->has_weak_ref,
+                       node->local_strong_refs, node->local_weak_refs,
+                       node->internal_strong_refs, count);
+       if (buf >= end)
+               return buf;
+       if (count) {
+               buf += snprintf(buf, end - buf, " proc");
+               if (buf >= end)
+                       return buf;
+               hlist_for_each_entry(ref, pos, &node->refs, node_entry) {
+                       buf += snprintf(buf, end - buf, " %d", ref->proc->pid);
+                       if (buf >= end)
+                               return buf;
+               }
+       }
+       buf += snprintf(buf, end - buf, "\n");
+       list_for_each_entry(w, &node->async_todo, entry) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_work(buf, end, "    ",
+                                       "    pending async transaction", w);
+       }
+       return buf;
+}
+
+static char *print_binder_ref(char *buf, char *end, struct binder_ref *ref)
+{
+       buf += snprintf(buf, end - buf, "  ref %d: desc %d %snode %d s %d w %d d %p\n",
+                       ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ",
+                       ref->node->debug_id, ref->strong, ref->weak, ref->death);
+       return buf;
+}
+
+static char *print_binder_proc(char *buf, char *end, struct binder_proc *proc, int print_all)
+{
+       struct binder_work *w;
+       struct rb_node *n;
+       char *start_buf = buf;
+       char *header_buf;
+
+       buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
+       header_buf = buf;
+
+       for (n = rb_first(&proc->threads); n != NULL && buf < end; n = rb_next(n))
+               buf = print_binder_thread(buf, end, rb_entry(n, struct binder_thread, rb_node), print_all);
+       for (n = rb_first(&proc->nodes); n != NULL && buf < end; n = rb_next(n)) {
+               struct binder_node *node = rb_entry(n, struct binder_node, rb_node);
+               if (print_all || node->has_async_transaction)
+                       buf = print_binder_node(buf, end, node);
+       }
+       if (print_all) {
+               for (n = rb_first(&proc->refs_by_desc); n != NULL && buf < end; n = rb_next(n))
+                       buf = print_binder_ref(buf, end, rb_entry(n, struct binder_ref, rb_node_desc));
+       }
+       for (n = rb_first(&proc->allocated_buffers); n != NULL && buf < end; n = rb_next(n))
+               buf = print_binder_buffer(buf, end, "  buffer", rb_entry(n, struct binder_buffer, rb_node));
+       list_for_each_entry(w, &proc->todo, entry) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_work(buf, end, "  ",
+                                       "  pending transaction", w);
+       }
+       list_for_each_entry(w, &proc->delivered_death, entry) {
+               if (buf >= end)
+                       break;
+               buf += snprintf(buf, end - buf, "  has delivered dead binder\n");
+               break;
+       }
+       if (!print_all && buf == header_buf)
+               buf = start_buf;
+       return buf;
+}
+
+static const char *binder_return_strings[] = {
+       "BR_ERROR",
+       "BR_OK",
+       "BR_TRANSACTION",
+       "BR_REPLY",
+       "BR_ACQUIRE_RESULT",
+       "BR_DEAD_REPLY",
+       "BR_TRANSACTION_COMPLETE",
+       "BR_INCREFS",
+       "BR_ACQUIRE",
+       "BR_RELEASE",
+       "BR_DECREFS",
+       "BR_ATTEMPT_ACQUIRE",
+       "BR_NOOP",
+       "BR_SPAWN_LOOPER",
+       "BR_FINISHED",
+       "BR_DEAD_BINDER",
+       "BR_CLEAR_DEATH_NOTIFICATION_DONE",
+       "BR_FAILED_REPLY"
+};
+
+static const char *binder_command_strings[] = {
+       "BC_TRANSACTION",
+       "BC_REPLY",
+       "BC_ACQUIRE_RESULT",
+       "BC_FREE_BUFFER",
+       "BC_INCREFS",
+       "BC_ACQUIRE",
+       "BC_RELEASE",
+       "BC_DECREFS",
+       "BC_INCREFS_DONE",
+       "BC_ACQUIRE_DONE",
+       "BC_ATTEMPT_ACQUIRE",
+       "BC_REGISTER_LOOPER",
+       "BC_ENTER_LOOPER",
+       "BC_EXIT_LOOPER",
+       "BC_REQUEST_DEATH_NOTIFICATION",
+       "BC_CLEAR_DEATH_NOTIFICATION",
+       "BC_DEAD_BINDER_DONE"
+};
+
+static const char *binder_objstat_strings[] = {
+       "proc",
+       "thread",
+       "node",
+       "ref",
+       "death",
+       "transaction",
+       "transaction_complete"
+};
+
+static char *print_binder_stats(char *buf, char *end, const char *prefix, struct binder_stats *stats)
+{
+       int i;
+
+       BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != ARRAY_SIZE(binder_command_strings));
+       for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
+               if (stats->bc[i])
+                       buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
+                                       binder_command_strings[i], stats->bc[i]);
+               if (buf >= end)
+                       return buf;
+       }
+
+       BUILD_BUG_ON(ARRAY_SIZE(stats->br) != ARRAY_SIZE(binder_return_strings));
+       for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
+               if (stats->br[i])
+                       buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix,
+                                       binder_return_strings[i], stats->br[i]);
+               if (buf >= end)
+                       return buf;
+       }
+
+       BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != ARRAY_SIZE(binder_objstat_strings));
+       BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != ARRAY_SIZE(stats->obj_deleted));
+       for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
+               if (stats->obj_created[i] || stats->obj_deleted[i])
+                       buf += snprintf(buf, end - buf, "%s%s: active %d total %d\n", prefix,
+                                       binder_objstat_strings[i],
+                                       stats->obj_created[i] - stats->obj_deleted[i],
+                                       stats->obj_created[i]);
+               if (buf >= end)
+                       return buf;
+       }
+       return buf;
+}
+
+static char *print_binder_proc_stats(char *buf, char *end, struct binder_proc *proc)
+{
+       struct binder_work *w;
+       struct rb_node *n;
+       int count, strong, weak;
+
+       buf += snprintf(buf, end - buf, "proc %d\n", proc->pid);
+       if (buf >= end)
+               return buf;
+       count = 0;
+       for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
+               count++;
+       buf += snprintf(buf, end - buf, "  threads: %d\n", count);
+       if (buf >= end)
+               return buf;
+       buf += snprintf(buf, end - buf, "  requested threads: %d+%d/%d\n"
+                       "  ready threads %d\n"
+                       "  free async space %d\n", proc->requested_threads,
+                       proc->requested_threads_started, proc->max_threads,
+                       proc->ready_threads, proc->free_async_space);
+       if (buf >= end)
+               return buf;
+       count = 0;
+       for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
+               count++;
+       buf += snprintf(buf, end - buf, "  nodes: %d\n", count);
+       if (buf >= end)
+               return buf;
+       count = 0;
+       strong = 0;
+       weak = 0;
+       for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
+               struct binder_ref *ref = rb_entry(n, struct binder_ref, rb_node_desc);
+               count++;
+               strong += ref->strong;
+               weak += ref->weak;
+       }
+       buf += snprintf(buf, end - buf, "  refs: %d s %d w %d\n", count, strong, weak);
+       if (buf >= end)
+               return buf;
+
+       count = 0;
+       for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n))
+               count++;
+       buf += snprintf(buf, end - buf, "  buffers: %d\n", count);
+       if (buf >= end)
+               return buf;
+
+       count = 0;
+       list_for_each_entry(w, &proc->todo, entry) {
+               switch (w->type) {
+               case BINDER_WORK_TRANSACTION:
+                       count++;
+                       break;
+               default:
+                       break;
+               }
+       }
+       buf += snprintf(buf, end - buf, "  pending transactions: %d\n", count);
+       if (buf >= end)
+               return buf;
+
+       buf = print_binder_stats(buf, end, "  ", &proc->stats);
+
+       return buf;
+}
+
+
+static int binder_read_proc_state(
+       char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+       struct binder_proc *proc;
+       struct hlist_node *pos;
+       struct binder_node *node;
+       int len = 0;
+       char *buf = page;
+       char *end = page + PAGE_SIZE;
+       int do_lock = !binder_debug_no_lock;
+
+       if (off)
+               return 0;
+
+       if (do_lock)
+               mutex_lock(&binder_lock);
+
+       buf += snprintf(buf, end - buf, "binder state:\n");
+
+       if (!hlist_empty(&binder_dead_nodes))
+               buf += snprintf(buf, end - buf, "dead nodes:\n");
+       hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_node(buf, end, node);
+       }
+
+       hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_proc(buf, end, proc, 1);
+       }
+       if (do_lock)
+               mutex_unlock(&binder_lock);
+       if (buf > page + PAGE_SIZE)
+               buf = page + PAGE_SIZE;
+
+       *start = page + off;
+
+       len = buf - page;
+       if (len > off)
+               len -= off;
+       else
+               len = 0;
+
+       return len < count ? len  : count;
+}
+
+static int binder_read_proc_stats(
+       char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+       struct binder_proc *proc;
+       struct hlist_node *pos;
+       int len = 0;
+       char *p = page;
+       int do_lock = !binder_debug_no_lock;
+
+       if (off)
+               return 0;
+
+       if (do_lock)
+               mutex_lock(&binder_lock);
+
+       p += snprintf(p, PAGE_SIZE, "binder stats:\n");
+
+       p = print_binder_stats(p, page + PAGE_SIZE, "", &binder_stats);
+
+       hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+               if (p >= page + PAGE_SIZE)
+                       break;
+               p = print_binder_proc_stats(p, page + PAGE_SIZE, proc);
+       }
+       if (do_lock)
+               mutex_unlock(&binder_lock);
+       if (p > page + PAGE_SIZE)
+               p = page + PAGE_SIZE;
+
+       *start = page + off;
+
+       len = p - page;
+       if (len > off)
+               len -= off;
+       else
+               len = 0;
+
+       return len < count ? len  : count;
+}
+
+static int binder_read_proc_transactions(
+       char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+       struct binder_proc *proc;
+       struct hlist_node *pos;
+       int len = 0;
+       char *buf = page;
+       char *end = page + PAGE_SIZE;
+       int do_lock = !binder_debug_no_lock;
+
+       if (off)
+               return 0;
+
+       if (do_lock)
+               mutex_lock(&binder_lock);
+
+       buf += snprintf(buf, end - buf, "binder transactions:\n");
+       hlist_for_each_entry(proc, pos, &binder_procs, proc_node) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_proc(buf, end, proc, 0);
+       }
+       if (do_lock)
+               mutex_unlock(&binder_lock);
+       if (buf > page + PAGE_SIZE)
+               buf = page + PAGE_SIZE;
+
+       *start = page + off;
+
+       len = buf - page;
+       if (len > off)
+               len -= off;
+       else
+               len = 0;
+
+       return len < count ? len  : count;
+}
+
+static int binder_read_proc_proc(
+       char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+       struct binder_proc *proc = data;
+       int len = 0;
+       char *p = page;
+       int do_lock = !binder_debug_no_lock;
+
+       if (off)
+               return 0;
+
+       if (do_lock)
+               mutex_lock(&binder_lock);
+       p += snprintf(p, PAGE_SIZE, "binder proc state:\n");
+       p = print_binder_proc(p, page + PAGE_SIZE, proc, 1);
+       if (do_lock)
+               mutex_unlock(&binder_lock);
+
+       if (p > page + PAGE_SIZE)
+               p = page + PAGE_SIZE;
+       *start = page + off;
+
+       len = p - page;
+       if (len > off)
+               len -= off;
+       else
+               len = 0;
+
+       return len < count ? len  : count;
+}
+
+static char *print_binder_transaction_log_entry(char *buf, char *end, struct binder_transaction_log_entry *e)
+{
+       buf += snprintf(buf, end - buf, "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n",
+                       e->debug_id, (e->call_type == 2) ? "reply" :
+                       ((e->call_type == 1) ? "async" : "call "), e->from_proc,
+                       e->from_thread, e->to_proc, e->to_thread, e->to_node,
+                       e->target_handle, e->data_size, e->offsets_size);
+       return buf;
+}
+
+static int binder_read_proc_transaction_log(
+       char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+       struct binder_transaction_log *log = data;
+       int len = 0;
+       int i;
+       char *buf = page;
+       char *end = page + PAGE_SIZE;
+
+       if (off)
+               return 0;
+
+       if (log->full) {
+               for (i = log->next; i < ARRAY_SIZE(log->entry); i++) {
+                       if (buf >= end)
+                               break;
+                       buf = print_binder_transaction_log_entry(buf, end, &log->entry[i]);
+               }
+       }
+       for (i = 0; i < log->next; i++) {
+               if (buf >= end)
+                       break;
+               buf = print_binder_transaction_log_entry(buf, end, &log->entry[i]);
+       }
+
+       *start = page + off;
+
+       len = buf - page;
+       if (len > off)
+               len -= off;
+       else
+               len = 0;
+
+       return len < count ? len  : count;
+}
+
+static struct file_operations binder_fops = {
+       .owner = THIS_MODULE,
+       .poll = binder_poll,
+       .unlocked_ioctl = binder_ioctl,
+       .mmap = binder_mmap,
+       .open = binder_open,
+       .flush = binder_flush,
+       .release = binder_release,
+};
+
+static struct miscdevice binder_miscdev = {
+       .minor = MISC_DYNAMIC_MINOR,
+       .name = "binder",
+       .fops = &binder_fops
+};
+
+static int __init binder_init(void)
+{
+       int ret;
+
+       binder_proc_dir_entry_root = proc_mkdir("binder", NULL);
+       if (binder_proc_dir_entry_root)
+               binder_proc_dir_entry_proc = proc_mkdir("proc", binder_proc_dir_entry_root);
+       ret = misc_register(&binder_miscdev);
+       if (binder_proc_dir_entry_root) {
+               create_proc_read_entry("state", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_state, NULL);
+               create_proc_read_entry("stats", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_stats, NULL);
+               create_proc_read_entry("transactions", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transactions, NULL);
+               create_proc_read_entry("transaction_log", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transaction_log, &binder_transaction_log);
+               create_proc_read_entry("failed_transaction_log", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transaction_log, &binder_transaction_log_failed);
+       }
+       return ret;
+}
+
+device_initcall(binder_init);
+
diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h
new file mode 100644 (file)
index 0000000..863ae1a
--- /dev/null
@@ -0,0 +1,330 @@
+/*
+ * Copyright (C) 2008 Google, Inc.
+ *
+ * Based on, but no longer compatible with, the original
+ * OpenBinder.org binder driver interface, which is:
+ *
+ * Copyright (c) 2005 Palmsource, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _LINUX_BINDER_H
+#define _LINUX_BINDER_H
+
+#include <linux/ioctl.h>
+
+#define B_PACK_CHARS(c1, c2, c3, c4) \
+       ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4))
+#define B_TYPE_LARGE 0x85
+
+enum {
+       BINDER_TYPE_BINDER      = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE),
+       BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE),
+       BINDER_TYPE_HANDLE      = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE),
+       BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE),
+       BINDER_TYPE_FD          = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE),
+};
+
+enum {
+       FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
+       FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
+};
+
+/*
+ * This is the flattened representation of a Binder object for transfer
+ * between processes.  The 'offsets' supplied as part of a binder transaction
+ * contains offsets into the data where these structures occur.  The Binder
+ * driver takes care of re-writing the structure type and data as it moves
+ * between processes.
+ */
+struct flat_binder_object {
+       /* 8 bytes for large_flat_header. */
+       unsigned long           type;
+       unsigned long           flags;
+
+       /* 8 bytes of data. */
+       union {
+               void            *binder;        /* local object */
+               signed long     handle;         /* remote object */
+       };
+
+       /* extra data associated with local object */
+       void                    *cookie;
+};
+
+/*
+ * On 64-bit platforms where user code may run in 32-bits the driver must
+ * translate the buffer (and local binder) addresses apropriately.
+ */
+
+struct binder_write_read {
+       signed long     write_size;     /* bytes to write */
+       signed long     write_consumed; /* bytes consumed by driver */
+       unsigned long   write_buffer;
+       signed long     read_size;      /* bytes to read */
+       signed long     read_consumed;  /* bytes consumed by driver */
+       unsigned long   read_buffer;
+};
+
+/* Use with BINDER_VERSION, driver fills in fields. */
+struct binder_version {
+       /* driver protocol version -- increment with incompatible change */
+       signed long     protocol_version;
+};
+
+/* This is the current protocol version. */
+#define BINDER_CURRENT_PROTOCOL_VERSION 7
+
+#define BINDER_WRITE_READ              _IOWR('b', 1, struct binder_write_read)
+#define        BINDER_SET_IDLE_TIMEOUT         _IOW('b', 3, int64_t)
+#define        BINDER_SET_MAX_THREADS          _IOW('b', 5, size_t)
+#define        BINDER_SET_IDLE_PRIORITY        _IOW('b', 6, int)
+#define        BINDER_SET_CONTEXT_MGR          _IOW('b', 7, int)
+#define        BINDER_THREAD_EXIT              _IOW('b', 8, int)
+#define BINDER_VERSION                 _IOWR('b', 9, struct binder_version)
+
+/*
+ * NOTE: Two special error codes you should check for when calling
+ * in to the driver are:
+ *
+ * EINTR -- The operation has been interupted.  This should be
+ * handled by retrying the ioctl() until a different error code
+ * is returned.
+ *
+ * ECONNREFUSED -- The driver is no longer accepting operations
+ * from your process.  That is, the process is being destroyed.
+ * You should handle this by exiting from your process.  Note
+ * that once this error code is returned, all further calls to
+ * the driver from any thread will return this same code.
+ */
+
+enum transaction_flags {
+       TF_ONE_WAY      = 0x01, /* this is a one-way call: async, no return */
+       TF_ROOT_OBJECT  = 0x04, /* contents are the component's root object */
+       TF_STATUS_CODE  = 0x08, /* contents are a 32-bit status code */
+       TF_ACCEPT_FDS   = 0x10, /* allow replies with file descriptors */
+};
+
+struct binder_transaction_data {
+       /* The first two are only used for bcTRANSACTION and brTRANSACTION,
+        * identifying the target and contents of the transaction.
+        */
+       union {
+               size_t  handle; /* target descriptor of command transaction */
+               void    *ptr;   /* target descriptor of return transaction */
+       } target;
+       void            *cookie;        /* target object cookie */
+       unsigned int    code;           /* transaction command */
+
+       /* General information about the transaction. */
+       unsigned int    flags;
+       pid_t           sender_pid;
+       uid_t           sender_euid;
+       size_t          data_size;      /* number of bytes of data */
+       size_t          offsets_size;   /* number of bytes of offsets */
+
+       /* If this transaction is inline, the data immediately
+        * follows here; otherwise, it ends with a pointer to
+        * the data buffer.
+        */
+       union {
+               struct {
+                       /* transaction data */
+                       const void      *buffer;
+                       /* offsets from buffer to flat_binder_object structs */
+                       const void      *offsets;
+               } ptr;
+               uint8_t buf[8];
+       } data;
+};
+
+struct binder_ptr_cookie {
+       void *ptr;
+       void *cookie;
+};
+
+struct binder_pri_desc {
+       int priority;
+       int desc;
+};
+
+struct binder_pri_ptr_cookie {
+       int priority;
+       void *ptr;
+       void *cookie;
+};
+
+enum BinderDriverReturnProtocol {
+       BR_ERROR = _IOR('r', 0, int),
+       /*
+        * int: error code
+        */
+
+       BR_OK = _IO('r', 1),
+       /* No parameters! */
+
+       BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data),
+       BR_REPLY = _IOR('r', 3, struct binder_transaction_data),
+       /*
+        * binder_transaction_data: the received command.
+        */
+
+       BR_ACQUIRE_RESULT = _IOR('r', 4, int),
+       /*
+        * not currently supported
+        * int: 0 if the last bcATTEMPT_ACQUIRE was not successful.
+        * Else the remote object has acquired a primary reference.
+        */
+
+       BR_DEAD_REPLY = _IO('r', 5),
+       /*
+        * The target of the last transaction (either a bcTRANSACTION or
+        * a bcATTEMPT_ACQUIRE) is no longer with us.  No parameters.
+        */
+
+       BR_TRANSACTION_COMPLETE = _IO('r', 6),
+       /*
+        * No parameters... always refers to the last transaction requested
+        * (including replies).  Note that this will be sent even for
+        * asynchronous transactions.
+        */
+
+       BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie),
+       BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie),
+       BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie),
+       BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie),
+       /*
+        * void *:      ptr to binder
+        * void *: cookie for binder
+        */
+
+       BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie),
+       /*
+        * not currently supported
+        * int: priority
+        * void *: ptr to binder
+        * void *: cookie for binder
+        */
+
+       BR_NOOP = _IO('r', 12),
+       /*
+        * No parameters.  Do nothing and examine the next command.  It exists
+        * primarily so that we can replace it with a BR_SPAWN_LOOPER command.
+        */
+
+       BR_SPAWN_LOOPER = _IO('r', 13),
+       /*
+        * No parameters.  The driver has determined that a process has no
+        * threads waiting to service incomming transactions.  When a process
+        * receives this command, it must spawn a new service thread and
+        * register it via bcENTER_LOOPER.
+        */
+
+       BR_FINISHED = _IO('r', 14),
+       /*
+        * not currently supported
+        * stop threadpool thread
+        */
+
+       BR_DEAD_BINDER = _IOR('r', 15, void *),
+       /*
+        * void *: cookie
+        */
+       BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, void *),
+       /*
+        * void *: cookie
+        */
+
+       BR_FAILED_REPLY = _IO('r', 17),
+       /*
+        * The the last transaction (either a bcTRANSACTION or
+        * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory).  No parameters.
+        */
+};
+
+enum BinderDriverCommandProtocol {
+       BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data),
+       BC_REPLY = _IOW('c', 1, struct binder_transaction_data),
+       /*
+        * binder_transaction_data: the sent command.
+        */
+
+       BC_ACQUIRE_RESULT = _IOW('c', 2, int),
+       /*
+        * not currently supported
+        * int:  0 if the last BR_ATTEMPT_ACQUIRE was not successful.
+        * Else you have acquired a primary reference on the object.
+        */
+
+       BC_FREE_BUFFER = _IOW('c', 3, int),
+       /*
+        * void *: ptr to transaction data received on a read
+        */
+
+       BC_INCREFS = _IOW('c', 4, int),
+       BC_ACQUIRE = _IOW('c', 5, int),
+       BC_RELEASE = _IOW('c', 6, int),
+       BC_DECREFS = _IOW('c', 7, int),
+       /*
+        * int: descriptor
+        */
+
+       BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie),
+       BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie),
+       /*
+        * void *: ptr to binder
+        * void *: cookie for binder
+        */
+
+       BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc),
+       /*
+        * not currently supported
+        * int: priority
+        * int: descriptor
+        */
+
+       BC_REGISTER_LOOPER = _IO('c', 11),
+       /*
+        * No parameters.
+        * Register a spawned looper thread with the device.
+        */
+
+       BC_ENTER_LOOPER = _IO('c', 12),
+       BC_EXIT_LOOPER = _IO('c', 13),
+       /*
+        * No parameters.
+        * These two commands are sent as an application-level thread
+        * enters and exits the binder loop, respectively.  They are
+        * used so the binder can have an accurate count of the number
+        * of looping threads it has available.
+        */
+
+       BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie),
+       /*
+        * void *: ptr to binder
+        * void *: cookie
+        */
+
+       BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie),
+       /*
+        * void *: ptr to binder
+        * void *: cookie
+        */
+
+       BC_DEAD_BINDER_DONE = _IOW('c', 16, void *),
+       /*
+        * void *: cookie
+        */
+};
+
+#endif /* _LINUX_BINDER_H */
+