--- /dev/null
+/* 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 DEFINE_MUTEX(binder_deferred_lock);
+
+static HLIST_HEAD(binder_procs);
+static HLIST_HEAD(binder_deferred_list);
+static HLIST_HEAD(binder_dead_nodes);
+
+static struct proc_dir_entry *binder_proc_dir_entry_root;
+static struct proc_dir_entry *binder_proc_dir_entry_proc;
+static struct binder_node *binder_context_mgr_node;
+static uid_t binder_context_mgr_uid = -1;
+static int binder_last_id;
+
+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
+
+#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
+
+#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_debug(mask, x...) \
+ do { \
+ if (binder_debug_mask & mask) \
+ printk(KERN_INFO x); \
+ } while (0)
+
+#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_types {
+ 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;
+
+static inline void binder_stats_deleted(enum binder_stat_types type)
+{
+ binder_stats.obj_deleted[type]++;
+}
+
+static inline void binder_stats_created(enum binder_stat_types type)
+{
+ binder_stats.obj_created[type]++;
+}
+
+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];
+};
+static struct binder_transaction_log binder_transaction_log;
+static 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;
+ unsigned 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];
+};
+
+enum binder_deferred_state {
+ BINDER_DEFERRED_PUT_FILES = 0x01,
+ BINDER_DEFERRED_FLUSH = 0x02,
+ BINDER_DEFERRED_RELEASE = 0x04,
+};
+
+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;
+ struct files_struct *files;
+ struct hlist_node deferred_work_node;
+ int deferred_work;
+ void *buffer;
+ ptrdiff_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;
+};
+
+static void
+binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
+
+/*
+ * copied from get_unused_fd_flags
+ */
+int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
+{
+ struct files_struct *files = proc->files;
+ int fd, error;
+ struct fdtable *fdt;
+ unsigned long rlim_cur;
+ unsigned long irqs;
+
+ 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.
+ */
+ rlim_cur = 0;
+ if (lock_task_sighand(proc->tsk, &irqs)) {
+ rlim_cur = proc->tsk->signal->rlim[RLIMIT_NOFILE].rlim_cur;
+ unlock_task_sighand(proc->tsk, &irqs);
+ }
+ 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);
+ return error;
+}
+
+/*
+ * copied from fd_install
+ */
+static void task_fd_install(
+ struct binder_proc *proc, unsigned int fd, struct file *file)
+{
+ struct files_struct *files = proc->files;
+ 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);
+}
+
+/*
+ * 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 binder_proc *proc, unsigned int fd)
+{
+ struct file *filp;
+ struct files_struct *files = proc->files;
+ 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;
+
+ return retval;
+
+out_unlock:
+ spin_unlock(&files->file_lock);
+ 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;
+ binder_debug(BINDER_DEBUG_PRIORITY_CAP,
+ "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);
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "binder: %d: add free buffer, size %zd, "
+ "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;
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "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 =
+ (uintptr_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, (uintptr_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 %zd-%zd\n", proc->pid, data_size, offsets_size);
+ return NULL;
+ }
+
+ if (is_async &&
+ proc->free_async_space < size + sizeof(struct binder_buffer)) {
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "binder: %d: binder_alloc_buf size %zd"
+ "failed, 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 %zd 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);
+ }
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "binder: %d: binder_alloc_buf size %zd got buff"
+ "er %p size %zd\n", proc->pid, size, buffer, buffer_size);
+
+ has_page_addr =
+ (void *)(((uintptr_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((uintptr_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((uintptr_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);
+ }
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "binder: %d: binder_alloc_buf size %zd 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);
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
+ "binder: %d: binder_alloc_buf size %zd "
+ "async free %zd\n", proc->pid, size,
+ proc->free_async_space);
+ }
+
+ return buffer;
+}
+
+static void *buffer_start_page(struct binder_buffer *buffer)
+{
+ return (void *)((uintptr_t)buffer & PAGE_MASK);
+}
+
+static void *buffer_end_page(struct binder_buffer *buffer)
+{
+ return (void *)(((uintptr_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;
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "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;
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "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) {
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "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 *));
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "binder: %d: binder_free_buf %p size %zd buffer"
+ "_size %zd\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);
+
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
+ "binder: %d: binder_free_buf size %zd "
+ "async free %zd\n", proc->pid, size,
+ proc->free_async_space);
+ }
+
+ binder_update_page_range(proc, 0,
+ (void *)PAGE_ALIGN((uintptr_t)buffer->data),
+ (void *)(((uintptr_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_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);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "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);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "binder: refless node %d deleted\n",
+ node->debug_id);
+ } else {
+ hlist_del(&node->dead_node);
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "binder: dead node %d deleted\n",
+ node->debug_id);
+ }
+ kfree(node);
+ binder_stats_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_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);
+
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "binder: %d new ref %d desc %d for "
+ "node %d\n", proc->pid, new_ref->debug_id,
+ new_ref->desc, node->debug_id);
+ } else {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "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)
+{
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "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) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "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_deleted(BINDER_STAT_DEATH);
+ }
+ kfree(ref);
+ binder_stats_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_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) {
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "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;
+
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "binder: send failed reply "
+ "for transaction %d, target dead\n",
+ t->debug_id);
+
+ binder_pop_transaction(target_thread, t);
+ if (next == NULL) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "binder: reply failed,"
+ " no target thread at root\n");
+ return;
+ }
+ t = next;
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "binder: reply failed, no target "
+ "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)
+{
+ size_t *offp, *off_end;
+ int debug_id = buffer->debug_id;
+
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "binder: %d buffer release %d, size %zd-%zd, 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) ||
+ buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
+ printk(KERN_ERR "binder: transaction release %d bad"
+ "offset %zd, size %zd\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;
+ }
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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;
+ }
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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:
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " fd %ld\n", fp->handle);
+ if (failed_at)
+ task_close_fd(proc, fp->handle);
+ break;
+
+ default:
+ printk(KERN_ERR "binder: transaction release %d bad "
+ "object type %lx\n", debug_id, fp->type);
+ break;
+ }
+ }
+}
+
+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;
+ if (tmp->to_thread != thread) {
+ binder_user_error("binder: %d:%d got new "
+ "transaction with bad transaction stack"
+ ", transaction %d has target %d:%d\n",
+ proc->pid, thread->pid, tmp->debug_id,
+ tmp->to_proc ? tmp->to_proc->pid : 0,
+ tmp->to_thread ?
+ tmp->to_thread->pid : 0);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_call_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_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_created(BINDER_STAT_TRANSACTION_COMPLETE);
+
+ t->debug_id = ++binder_last_id;
+ e->debug_id = t->debug_id;
+
+ if (reply)
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "binder: %d:%d BC_REPLY %d -> %d:%d, "
+ "data %p-%p size %zd-%zd\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
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "binder: %d:%d BC_TRANSACTION %d -> "
+ "%d - node %d, data %p-%p size %zd-%zd\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->cred->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;
+ }
+ if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) {
+ binder_user_error("binder: %d:%d got transaction with "
+ "invalid offsets size, %zd\n",
+ proc->pid, thread->pid, tr->offsets_size);
+ return_error = BR_FAILED_REPLY;
+ goto err_bad_offset;
+ }
+ 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) ||
+ t->buffer->data_size < sizeof(*fp) ||
+ !IS_ALIGNED(*offp, sizeof(void *))) {
+ binder_user_error("binder: %d:%d got transaction with "
+ "invalid offset, %zd\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);
+
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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, O_CLOEXEC);
+ if (target_fd < 0) {
+ fput(file);
+ return_error = BR_FAILED_REPLY;
+ goto err_get_unused_fd_failed;
+ }
+ task_fd_install(target_proc, target_fd, file);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ " 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_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
+err_alloc_tcomplete_failed:
+ kfree(t);
+ binder_stats_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:
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "binder: %d:%d transaction failed %d, size %zd-%zd\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;
+}
+
+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;
+ }
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "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);
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "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;
+ }
+ binder_debug(BINDER_DEBUG_FREE_BUFFER,
+ "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:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "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:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "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:
+ binder_debug(BINDER_DEBUG_THREADS,
+ "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;
+ }
+
+ binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
+ "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;
+ binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
+ "binder: %d:%d "
+ "BC_REQUEST_DEATH_NOTIFICATION failed\n",
+ proc->pid, thread->pid);
+ break;
+ }
+ binder_stats_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;
+ }
+ }
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "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);
+ binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
+ "binder: %d:%d BR_TRANSACTION_COMPLETE\n",
+ proc->pid, thread->pid);
+
+ list_del(&w->entry);
+ kfree(w);
+ binder_stats_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);
+ binder_debug(BINDER_DEBUG_USER_REFS,
+ "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) {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "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_deleted(BINDER_STAT_NODE);
+ } else {
+ binder_debug(BINDER_DEBUG_INTERNAL_REFS,
+ "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;
+ uint32_t cmd;
+
+ death = container_of(w, struct binder_ref_death, work);
+ 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 *);
+ binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
+ "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_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 *)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);
+ binder_debug(BINDER_DEBUG_TRANSACTION,
+ "binder: %d:%d %s %d %d:%d, cmd %d"
+ "size %zd-%zd 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_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++;
+ binder_debug(BINDER_DEBUG_THREADS,
+ "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;
+
+ 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_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_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++;
+ binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
+ "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_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;
+ }
+ binder_debug(BINDER_DEBUG_READ_WRITE,
+ "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;
+ }
+ }
+ binder_debug(BINDER_DEBUG_READ_WRITE,
+ "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->cred->euid) {
+ printk(KERN_ERR "binder: BINDER_SET_"
+ "CONTEXT_MGR bad uid %d != %d\n",
+ current->cred->euid,
+ binder_context_mgr_uid);
+ ret = -EPERM;
+ goto err;
+ }
+ } else
+ binder_context_mgr_uid = current->cred->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:
+ binder_debug(BINDER_DEBUG_THREADS, "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;
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "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,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+ dump_stack();
+}
+
+static void binder_vma_close(struct vm_area_struct *vma)
+{
+ struct binder_proc *proc = vma->vm_private_data;
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "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,
+ (unsigned long)pgprot_val(vma->vm_page_prot));
+ proc->vma = NULL;
+ binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES);
+}
+
+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;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "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,
+ (unsigned long)pgprot_val(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;
+
+ if (proc->buffer) {
+ ret = -EBUSY;
+ failure_string = "already mapped";
+ goto err_already_mapped;
+ }
+
+ 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 - (uintptr_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->files = get_files_struct(current);
+ 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);
+ proc->pages = NULL;
+err_alloc_pages_failed:
+ vfree(proc->buffer);
+ proc->buffer = NULL;
+err_get_vm_area_failed:
+err_already_mapped:
+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;
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE, "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_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);
+ remove_proc_entry(strbuf, binder_proc_dir_entry_proc);
+ 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 binder_proc *proc = filp->private_data;
+
+ binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
+
+ return 0;
+}
+
+static void binder_deferred_flush(struct binder_proc *proc)
+{
+ struct rb_node *n;
+ int wake_count = 0;
+ 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);
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "binder_flush: %d woke %d threads\n", proc->pid,
+ wake_count);
+}
+
+static int binder_release(struct inode *nodp, struct file *filp)
+{
+ struct binder_proc *proc = filp->private_data;
+ 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);
+ }
+
+ binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
+
+ return 0;
+}
+
+static void binder_deferred_release(struct binder_proc *proc)
+{
+ struct hlist_node *pos;
+ struct binder_transaction *t;
+ struct rb_node *n;
+ int threads, nodes, incoming_refs, outgoing_refs, buffers, active_transactions, page_count;
+
+ BUG_ON(proc->vma);
+ BUG_ON(proc->files);
+
+ hlist_del(&proc->proc_node);
+ if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) {
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "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_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();
+ }
+ }
+ binder_debug(BINDER_DEBUG_DEAD_BINDER,
+ "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_deleted(BINDER_STAT_PROC);
+
+ page_count = 0;
+ if (proc->pages) {
+ int i;
+ for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) {
+ if (proc->pages[i]) {
+ binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
+ "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);
+
+ binder_debug(BINDER_DEBUG_OPEN_CLOSE,
+ "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);
+}
+
+static void binder_deferred_func(struct work_struct *work)
+{
+ struct binder_proc *proc;
+ struct files_struct *files;
+
+ int defer;
+ do {
+ mutex_lock(&binder_lock);
+ mutex_lock(&binder_deferred_lock);
+ if (!hlist_empty(&binder_deferred_list)) {
+ proc = hlist_entry(binder_deferred_list.first,
+ struct binder_proc, deferred_work_node);
+ hlist_del_init(&proc->deferred_work_node);
+ defer = proc->deferred_work;
+ proc->deferred_work = 0;
+ } else {
+ proc = NULL;
+ defer = 0;
+ }
+ mutex_unlock(&binder_deferred_lock);
+
+ files = NULL;
+ if (defer & BINDER_DEFERRED_PUT_FILES) {
+ files = proc->files;
+ if (files)
+ proc->files = NULL;
+ }
+
+ if (defer & BINDER_DEFERRED_FLUSH)
+ binder_deferred_flush(proc);
+
+ if (defer & BINDER_DEFERRED_RELEASE)
+ binder_deferred_release(proc); /* frees proc */
+
+ mutex_unlock(&binder_lock);
+ if (files)
+ put_files_struct(files);
+ } while (proc);
+}
+static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
+
+static void
+binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
+{
+ mutex_lock(&binder_deferred_lock);
+ proc->deferred_work |= defer;
+ if (hlist_unhashed(&proc->deferred_work_node)) {
+ hlist_add_head(&proc->deferred_work_node,
+ &binder_deferred_list);
+ schedule_work(&binder_deferred_work);
+ }
+ mutex_unlock(&binder_deferred_lock);
+}
+
+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 %zd:%zd 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 %zd:%zd %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 %zd\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 const 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);
+
+MODULE_LICENSE("GPL v2");
projects / firefly-linux-kernel-4.4.55.git / commitdiff