diff options
Diffstat (limited to 'drivers/android/binder.c')
| -rw-r--r-- | drivers/android/binder.c | 3495 |
1 files changed, 0 insertions, 3495 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c deleted file mode 100644 index 87ae0b8965b..00000000000 --- a/drivers/android/binder.c +++ /dev/null @@ -1,3495 +0,0 @@ -/* drivers/android/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/binder.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> - -static DEFINE_MUTEX(binder_lock); -static HLIST_HEAD(binder_procs); -static struct binder_node *binder_context_mgr_node; -static uid_t binder_context_mgr_uid = -1; -static int binder_last_id; -static struct proc_dir_entry *binder_proc_dir_entry_root; -static struct proc_dir_entry *binder_proc_dir_entry_proc; -static struct hlist_head binder_dead_nodes; - -static int binder_read_proc_proc( - char *page, char **start, off_t off, int count, int *eof, void *data); - -/* This is only defined in include/asm-arm/sizes.h */ -#ifndef SZ_1K -#define SZ_1K 0x400 -#endif - -#ifndef SZ_4M -#define SZ_4M 0x400000 -#endif - -#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_user_error(x...) \ - do { \ - if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ - printk(KERN_INFO x); \ - if (binder_stop_on_user_error) \ - binder_stop_on_user_error = 2; \ - } while (0) - -enum { - BINDER_STAT_PROC, - BINDER_STAT_THREAD, - BINDER_STAT_NODE, - BINDER_STAT_REF, - BINDER_STAT_DEATH, - BINDER_STAT_TRANSACTION, - BINDER_STAT_TRANSACTION_COMPLETE, - BINDER_STAT_COUNT -}; - -struct binder_stats { - int br[_IOC_NR(BR_FAILED_REPLY) + 1]; - int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1]; - int obj_created[BINDER_STAT_COUNT]; - int obj_deleted[BINDER_STAT_COUNT]; -}; - -static struct binder_stats binder_stats; - -struct binder_transaction_log_entry { - int debug_id; - int call_type; - int from_proc; - int from_thread; - int target_handle; - int to_proc; - int to_thread; - int to_node; - int data_size; - int offsets_size; -}; -struct binder_transaction_log { - int next; - int full; - struct binder_transaction_log_entry entry[32]; -}; -struct binder_transaction_log binder_transaction_log; -struct binder_transaction_log binder_transaction_log_failed; - -static struct binder_transaction_log_entry *binder_transaction_log_add( - struct binder_transaction_log *log) -{ - struct binder_transaction_log_entry *e; - e = &log->entry[log->next]; - memset(e, 0, sizeof(*e)); - log->next++; - if (log->next == ARRAY_SIZE(log->entry)) { - log->next = 0; - log->full = 1; - } - return e; -} - -struct binder_work { - struct list_head entry; - enum { - BINDER_WORK_TRANSACTION = 1, - BINDER_WORK_TRANSACTION_COMPLETE, - BINDER_WORK_NODE, - BINDER_WORK_DEAD_BINDER, - BINDER_WORK_DEAD_BINDER_AND_CLEAR, - BINDER_WORK_CLEAR_DEATH_NOTIFICATION, - } type; -}; - -struct binder_node { - int debug_id; - struct binder_work work; - union { - struct rb_node rb_node; - struct hlist_node dead_node; - }; - struct binder_proc *proc; - struct hlist_head refs; - int internal_strong_refs; - int local_weak_refs; - int local_strong_refs; - void __user *ptr; - void __user *cookie; - unsigned has_strong_ref : 1; - unsigned pending_strong_ref : 1; - unsigned has_weak_ref : 1; - unsigned pending_weak_ref : 1; - unsigned has_async_transaction : 1; - unsigned accept_fds : 1; - int min_priority : 8; - struct list_head async_todo; -}; - -struct binder_ref_death { - struct binder_work work; - void __user *cookie; -}; - -struct binder_ref { - /* Lookups needed: */ - /* node + proc => ref (transaction) */ - /* desc + proc => ref (transaction, inc/dec ref) */ - /* node => refs + procs (proc exit) */ - int debug_id; - struct rb_node rb_node_desc; - struct rb_node rb_node_node; - struct hlist_node node_entry; - struct binder_proc *proc; - struct binder_node *node; - uint32_t desc; - int strong; - int weak; - struct binder_ref_death *death; -}; - -struct binder_buffer { - struct list_head entry; /* free and allocated entries by addesss */ - struct rb_node rb_node; /* free entry by size or allocated entry */ - /* by address */ - unsigned free : 1; - unsigned allow_user_free : 1; - unsigned async_transaction : 1; - unsigned debug_id : 29; - - struct binder_transaction *transaction; - - struct binder_node *target_node; - size_t data_size; - size_t offsets_size; - uint8_t data[0]; -}; - -struct binder_proc { - struct hlist_node proc_node; - struct rb_root threads; - struct rb_root nodes; - struct rb_root refs_by_desc; - struct rb_root refs_by_node; - int pid; - struct vm_area_struct *vma; - struct task_struct *tsk; - void *buffer; - size_t user_buffer_offset; - - struct list_head buffers; - struct rb_root free_buffers; - struct rb_root allocated_buffers; - size_t free_async_space; - - struct page **pages; - size_t buffer_size; - uint32_t buffer_free; - struct list_head todo; - wait_queue_head_t wait; - struct binder_stats stats; - struct list_head delivered_death; - int max_threads; - int requested_threads; - int requested_threads_started; - int ready_threads; - long default_priority; -}; - -enum { - BINDER_LOOPER_STATE_REGISTERED = 0x01, - BINDER_LOOPER_STATE_ENTERED = 0x02, - BINDER_LOOPER_STATE_EXITED = 0x04, - BINDER_LOOPER_STATE_INVALID = 0x08, - BINDER_LOOPER_STATE_WAITING = 0x10, - BINDER_LOOPER_STATE_NEED_RETURN = 0x20 -}; - -struct binder_thread { - struct binder_proc *proc; - struct rb_node rb_node; - int pid; - int looper; - struct binder_transaction *transaction_stack; - struct list_head todo; - uint32_t return_error; /* Write failed, return error code in read buf */ - uint32_t return_error2; /* Write failed, return error code in read */ - /* buffer. Used when sending a reply to a dead process that */ - /* we are also waiting on */ - wait_queue_head_t wait; - struct binder_stats stats; -}; - -struct binder_transaction { - int debug_id; - struct binder_work work; - struct binder_thread *from; - struct binder_transaction *from_parent; - struct binder_proc *to_proc; - struct binder_thread *to_thread; - struct binder_transaction *to_parent; - unsigned need_reply : 1; - /*unsigned is_dead : 1;*/ /* not used at the moment */ - - struct binder_buffer *buffer; - unsigned int code; - unsigned int flags; - long priority; - long saved_priority; - uid_t sender_euid; -}; - -/* - * copied from get_unused_fd_flags - */ -int task_get_unused_fd_flags(struct task_struct *tsk, int flags) -{ - struct files_struct *files = get_files_struct(tsk); - int fd, error; - struct fdtable *fdt; - unsigned long rlim_cur; - - if (files == NULL) - return -ESRCH; - - error = -EMFILE; - spin_lock(&files->file_lock); - -repeat: - fdt = files_fdtable(files); - fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds, - files->next_fd); - - /* - * N.B. For clone tasks sharing a files structure, this test - * will limit the total number of files that can be opened. - */ - rcu_read_lock(); - if (tsk->signal) - rlim_cur = tsk->signal->rlim[RLIMIT_NOFILE].rlim_cur; - else - rlim_cur = 0; - rcu_read_unlock(); - if (fd >= rlim_cur) - goto out; - - /* Do we need to expand the fd array or fd set? */ - error = expand_files(files, fd); - if (error < 0) - goto out; - - if (error) { - /* - * If we needed to expand the fs array we - * might have blocked - try again. - */ - error = -EMFILE; - goto repeat; - } - - FD_SET(fd, fdt->open_fds); - if (flags & O_CLOEXEC) - FD_SET(fd, fdt->close_on_exec); - else - FD_CLR(fd, fdt->close_on_exec); - files->next_fd = fd + 1; -#if 1 - /* Sanity check */ - if (fdt->fd[fd] != NULL) { - printk(KERN_WARNING "get_unused_fd: slot %d not NULL!\n", fd); - fdt->fd[fd] = NULL; - } -#endif - error = fd; - -out: - spin_unlock(&files->file_lock); - put_files_struct(files); - return error; -} - -/* - * copied from fd_install - */ -static void task_fd_install( - struct task_struct *tsk, unsigned int fd, struct file *file) -{ - struct files_struct *files = get_files_struct(tsk); - struct fdtable *fdt; - - if (files == NULL) - return; - - spin_lock(&files->file_lock); - fdt = files_fdtable(files); - BUG_ON(fdt->fd[fd] != NULL); - rcu_assign_pointer(fdt->fd[fd], file); - spin_unlock(&files->file_lock); - put_files_struct(files); -} - -/* - * copied from __put_unused_fd in open.c - */ -static void __put_unused_fd(struct files_struct *files, unsigned int fd) -{ - struct fdtable *fdt = files_fdtable(files); - __FD_CLR(fd, fdt->open_fds); - if (fd < files->next_fd) - files->next_fd = fd; -} - -/* - * copied from sys_close - */ -static long task_close_fd(struct task_struct *tsk, unsigned int fd) -{ - struct file *filp; - struct files_struct *files = get_files_struct(tsk); - struct fdtable *fdt; - int retval; - - if (files == NULL) - return -ESRCH; - - spin_lock(&files->file_lock); - fdt = files_fdtable(files); - if (fd >= fdt->max_fds) - goto out_unlock; - filp = fdt->fd[fd]; - if (!filp) - goto out_unlock; - rcu_assign_pointer(fdt->fd[fd], NULL); - FD_CLR(fd, fdt->close_on_exec); - __put_unused_fd(files, fd); - spin_unlock(&files->file_lock); - retval = filp_close(filp, files); - - /* can't restart close syscall because file table entry was cleared */ - if (unlikely(retval == -ERESTARTSYS || - retval == -ERESTARTNOINTR || - retval == -ERESTARTNOHAND || - retval == -ERESTART_RESTARTBLOCK)) - retval = -EINTR; - - put_files_struct(files); - return retval; - -out_unlock: - spin_unlock(&files->file_lock); - put_files_struct(files); - return -EBADF; -} - -static void binder_set_nice(long nice) -{ - long min_nice; - if (can_nice(current, nice)) { - set_user_nice(current, nice); - return; - } - min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; - if (binder_debug_mask & BINDER_DEBUG_PRIORITY_CAP) - printk(KERN_INFO "binder: %d: nice value %ld not allowed use " - "%ld instead\n", current->pid, nice, min_nice); - set_user_nice(current, min_nice); - if (min_nice < 20) - return; - binder_user_error("binder: %d RLIMIT_NICE not set\n", current->pid); -} - -static size_t binder_buffer_size( - struct binder_proc *proc, struct binder_buffer *buffer) -{ - if (list_is_last(&buffer->entry, &proc->buffers)) - return proc->buffer + proc->buffer_size - (void *)buffer->data; - else - return (size_t)list_entry(buffer->entry.next, - struct binder_buffer, entry) - (size_t)buffer->data; -} - -static void binder_insert_free_buffer( - struct binder_proc *proc, struct binder_buffer *new_buffer) -{ - struct rb_node **p = &proc->free_buffers.rb_node; - struct rb_node *parent = NULL; - struct binder_buffer *buffer; - size_t buffer_size; - size_t new_buffer_size; - - BUG_ON(!new_buffer->free); - - new_buffer_size = binder_buffer_size(proc, new_buffer); - - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: add free buffer, size %d, " - "at %p\n", proc->pid, new_buffer_size, new_buffer); - - while (*p) { - parent = *p; - buffer = rb_entry(parent, struct binder_buffer, rb_node); - BUG_ON(!buffer->free); - - buffer_size = binder_buffer_size(proc, buffer); - - if (new_buffer_size < buffer_size) - p = &parent->rb_left; - else - p = &parent->rb_right; - } - rb_link_node(&new_buffer->rb_node, parent, p); - rb_insert_color(&new_buffer->rb_node, &proc->free_buffers); -} - -static void binder_insert_allocated_buffer( - struct binder_proc *proc, struct binder_buffer *new_buffer) -{ - struct rb_node **p = &proc->allocated_buffers.rb_node; - struct rb_node *parent = NULL; - struct binder_buffer *buffer; - - BUG_ON(new_buffer->free); - - while (*p) { - parent = *p; - buffer = rb_entry(parent, struct binder_buffer, rb_node); - BUG_ON(buffer->free); - - if (new_buffer < buffer) - p = &parent->rb_left; - else if (new_buffer > buffer) - p = &parent->rb_right; - else - BUG(); - } - rb_link_node(&new_buffer->rb_node, parent, p); - rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers); -} - -static struct binder_buffer *binder_buffer_lookup( - struct binder_proc *proc, void __user *user_ptr) -{ - struct rb_node *n = proc->allocated_buffers.rb_node; - struct binder_buffer *buffer; - struct binder_buffer *kern_ptr; - - kern_ptr = user_ptr - proc->user_buffer_offset - - offsetof(struct binder_buffer, data); - - while (n) { - buffer = rb_entry(n, struct binder_buffer, rb_node); - BUG_ON(buffer->free); - - if (kern_ptr < buffer) - n = n->rb_left; - else if (kern_ptr > buffer) - n = n->rb_right; - else - return buffer; - } - return NULL; -} - -static int binder_update_page_range(struct binder_proc *proc, int allocate, - void *start, void *end, struct vm_area_struct *vma) -{ - void *page_addr; - unsigned long user_page_addr; - struct vm_struct tmp_area; - struct page **page; - struct mm_struct *mm; - - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: %s pages %p-%p\n", - proc->pid, allocate ? "allocate" : "free", start, end); - - if (end <= start) - return 0; - - if (vma) - mm = NULL; - else - mm = get_task_mm(proc->tsk); - - if (mm) { - down_write(&mm->mmap_sem); - vma = proc->vma; - } - - if (allocate == 0) - goto free_range; - - if (vma == NULL) { - printk(KERN_ERR "binder: %d: binder_alloc_buf failed to " - "map pages in userspace, no vma\n", proc->pid); - goto err_no_vma; - } - - for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) { - int ret; - struct page **page_array_ptr; - page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; - - BUG_ON(*page); - *page = alloc_page(GFP_KERNEL | __GFP_ZERO); - if (*page == NULL) { - printk(KERN_ERR "binder: %d: binder_alloc_buf failed " - "for page at %p\n", proc->pid, page_addr); - goto err_alloc_page_failed; - } - tmp_area.addr = page_addr; - tmp_area.size = PAGE_SIZE + PAGE_SIZE /* guard page? */; - page_array_ptr = page; - ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr); - if (ret) { - printk(KERN_ERR "binder: %d: binder_alloc_buf failed " - "to map page at %p in kernel\n", - proc->pid, page_addr); - goto err_map_kernel_failed; - } - user_page_addr = (size_t)page_addr + proc->user_buffer_offset; - ret = vm_insert_page(vma, user_page_addr, page[0]); - if (ret) { - printk(KERN_ERR "binder: %d: binder_alloc_buf failed " - "to map page at %lx in userspace\n", - proc->pid, user_page_addr); - goto err_vm_insert_page_failed; - } - /* vm_insert_page does not seem to increment the refcount */ - } - if (mm) { - up_write(&mm->mmap_sem); - mmput(mm); - } - return 0; - -free_range: - for (page_addr = end - PAGE_SIZE; page_addr >= start; - page_addr -= PAGE_SIZE) { - page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; - if (vma) - zap_page_range(vma, (size_t)page_addr + - proc->user_buffer_offset, PAGE_SIZE, NULL); -err_vm_insert_page_failed: - unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); -err_map_kernel_failed: - __free_page(*page); - *page = NULL; -err_alloc_page_failed: - ; - } -err_no_vma: - if (mm) { - up_write(&mm->mmap_sem); - mmput(mm); - } - return -ENOMEM; -} - -static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc, - size_t data_size, size_t offsets_size, int is_async) -{ - struct rb_node *n = proc->free_buffers.rb_node; - struct binder_buffer *buffer; - size_t buffer_size; - struct rb_node *best_fit = NULL; - void *has_page_addr; - void *end_page_addr; - size_t size; - - if (proc->vma == NULL) { - printk(KERN_ERR "binder: %d: binder_alloc_buf, no vma\n", - proc->pid); - return NULL; - } - - size = ALIGN(data_size, sizeof(void *)) + - ALIGN(offsets_size, sizeof(void *)); - - if (size < data_size || size < offsets_size) { - binder_user_error("binder: %d: got transaction with invalid " - "size %d-%d\n", proc->pid, data_size, offsets_size); - return NULL; - } - - if (is_async && - proc->free_async_space < size + sizeof(struct binder_buffer)) { - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_ERR "binder: %d: binder_alloc_buf size %d f" - "ailed, no async space left\n", proc->pid, size); - return NULL; - } - - while (n) { - buffer = rb_entry(n, struct binder_buffer, rb_node); - BUG_ON(!buffer->free); - buffer_size = binder_buffer_size(proc, buffer); - - if (size < buffer_size) { - best_fit = n; - n = n->rb_left; - } else if (size > buffer_size) - n = n->rb_right; - else { - best_fit = n; - break; - } - } - if (best_fit == NULL) { - printk(KERN_ERR "binder: %d: binder_alloc_buf size %d failed, " - "no address space\n", proc->pid, size); - return NULL; - } - if (n == NULL) { - buffer = rb_entry(best_fit, struct binder_buffer, rb_node); - buffer_size = binder_buffer_size(proc, buffer); - } - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: binder_alloc_buf size %d got buff" - "er %p size %d\n", proc->pid, size, buffer, buffer_size); - - has_page_addr = - (void *)(((size_t)buffer->data + buffer_size) & PAGE_MASK); - if (n == NULL) { - if (size + sizeof(struct binder_buffer) + 4 >= buffer_size) - buffer_size = size; /* no room for other buffers */ - else - buffer_size = size + sizeof(struct binder_buffer); - } - end_page_addr = (void *)PAGE_ALIGN((size_t)buffer->data + buffer_size); - if (end_page_addr > has_page_addr) - end_page_addr = has_page_addr; - if (binder_update_page_range(proc, 1, - (void *)PAGE_ALIGN((size_t)buffer->data), end_page_addr, NULL)) - return NULL; - - rb_erase(best_fit, &proc->free_buffers); - buffer->free = 0; - binder_insert_allocated_buffer(proc, buffer); - if (buffer_size != size) { - struct binder_buffer *new_buffer = (void *)buffer->data + size; - list_add(&new_buffer->entry, &buffer->entry); - new_buffer->free = 1; - binder_insert_free_buffer(proc, new_buffer); - } - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: binder_alloc_buf size %d got " - "%p\n", proc->pid, size, buffer); - buffer->data_size = data_size; - buffer->offsets_size = offsets_size; - buffer->async_transaction = is_async; - if (is_async) { - proc->free_async_space -= size + sizeof(struct binder_buffer); - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC) - printk(KERN_INFO "binder: %d: binder_alloc_buf size %d " - "async free %d\n", proc->pid, size, - proc->free_async_space); - } - - return buffer; -} - -static void *buffer_start_page(struct binder_buffer *buffer) -{ - return (void *)((size_t)buffer & PAGE_MASK); -} - -static void *buffer_end_page(struct binder_buffer *buffer) -{ - return (void *)(((size_t)(buffer + 1) - 1) & PAGE_MASK); -} - -static void binder_delete_free_buffer( - struct binder_proc *proc, struct binder_buffer *buffer) -{ - struct binder_buffer *prev, *next = NULL; - int free_page_end = 1; - int free_page_start = 1; - - BUG_ON(proc->buffers.next == &buffer->entry); - prev = list_entry(buffer->entry.prev, struct binder_buffer, entry); - BUG_ON(!prev->free); - if (buffer_end_page(prev) == buffer_start_page(buffer)) { - free_page_start = 0; - if (buffer_end_page(prev) == buffer_end_page(buffer)) - free_page_end = 0; - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: merge free, buffer %p " - "share page with %p\n", proc->pid, buffer, prev); - } - - if (!list_is_last(&buffer->entry, &proc->buffers)) { - next = list_entry(buffer->entry.next, - struct binder_buffer, entry); - if (buffer_start_page(next) == buffer_end_page(buffer)) { - free_page_end = 0; - if (buffer_start_page(next) == - buffer_start_page(buffer)) - free_page_start = 0; - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: merge free, " - "buffer %p share page with %p\n", - proc->pid, buffer, prev); - } - } - list_del(&buffer->entry); - if (free_page_start || free_page_end) { - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: merge free, buffer %p do " - "not share page%s%s with with %p or %p\n", - proc->pid, buffer, free_page_start ? "" : " end", - free_page_end ? "" : " start", prev, next); - binder_update_page_range(proc, 0, free_page_start ? - buffer_start_page(buffer) : buffer_end_page(buffer), - (free_page_end ? buffer_end_page(buffer) : - buffer_start_page(buffer)) + PAGE_SIZE, NULL); - } -} - -static void binder_free_buf( - struct binder_proc *proc, struct binder_buffer *buffer) -{ - size_t size, buffer_size; - - buffer_size = binder_buffer_size(proc, buffer); - - size = ALIGN(buffer->data_size, sizeof(void *)) + - ALIGN(buffer->offsets_size, sizeof(void *)); - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder: %d: binder_free_buf %p size %d buffer" - "_size %d\n", proc->pid, buffer, size, buffer_size); - - BUG_ON(buffer->free); - BUG_ON(size > buffer_size); - BUG_ON(buffer->transaction != NULL); - BUG_ON((void *)buffer < proc->buffer); - BUG_ON((void *)buffer > proc->buffer + proc->buffer_size); - - if (buffer->async_transaction) { - proc->free_async_space += size + sizeof(struct binder_buffer); - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC_ASYNC) - printk(KERN_INFO "binder: %d: binder_free_buf size %d " - "async free %d\n", proc->pid, size, - proc->free_async_space); - } - - binder_update_page_range(proc, 0, - (void *)PAGE_ALIGN((size_t)buffer->data), - (void *)(((size_t)buffer->data + buffer_size) & PAGE_MASK), - NULL); - rb_erase(&buffer->rb_node, &proc->allocated_buffers); - buffer->free = 1; - if (!list_is_last(&buffer->entry, &proc->buffers)) { - struct binder_buffer *next = list_entry(buffer->entry.next, - struct binder_buffer, entry); - if (next->free) { - rb_erase(&next->rb_node, &proc->free_buffers); - binder_delete_free_buffer(proc, next); - } - } - if (proc->buffers.next != &buffer->entry) { - struct binder_buffer *prev = list_entry(buffer->entry.prev, - struct binder_buffer, entry); - if (prev->free) { - binder_delete_free_buffer(proc, buffer); - rb_erase(&prev->rb_node, &proc->free_buffers); - buffer = prev; - } - } - binder_insert_free_buffer(proc, buffer); -} - -static struct binder_node * -binder_get_node(struct binder_proc *proc, void __user *ptr) -{ - struct rb_node *n = proc->nodes.rb_node; - struct binder_node *node; - - while (n) { - node = rb_entry(n, struct binder_node, rb_node); - - if (ptr < node->ptr) - n = n->rb_left; - else if (ptr > node->ptr) - n = n->rb_right; - else - return node; - } - return NULL; -} - -static struct binder_node * -binder_new_node(struct binder_proc *proc, void __user *ptr, void __user *cookie) -{ - struct rb_node **p = &proc->nodes.rb_node; - struct rb_node *parent = NULL; - struct binder_node *node; - - while (*p) { - parent = *p; - node = rb_entry(parent, struct binder_node, rb_node); - - if (ptr < node->ptr) - p = &(*p)->rb_left; - else if (ptr > node->ptr) - p = &(*p)->rb_right; - else - return NULL; - } - - node = kzalloc(sizeof(*node), GFP_KERNEL); - if (node == NULL) - return NULL; - binder_stats.obj_created[BINDER_STAT_NODE]++; - rb_link_node(&node->rb_node, parent, p); - rb_insert_color(&node->rb_node, &proc->nodes); - node->debug_id = ++binder_last_id; - node->proc = proc; - node->ptr = ptr; - node->cookie = cookie; - node->work.type = BINDER_WORK_NODE; - INIT_LIST_HEAD(&node->work.entry); - INIT_LIST_HEAD(&node->async_todo); - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d:%d node %d u%p c%p created\n", - proc->pid, current->pid, node->debug_id, - node->ptr, node->cookie); - return node; -} - -static int -binder_inc_node(struct binder_node *node, int strong, int internal, - struct list_head *target_list) -{ - if (strong) { - if (internal) { - if (target_list == NULL && - node->internal_strong_refs == 0 && - !(node == binder_context_mgr_node && - node->has_strong_ref)) { - printk(KERN_ERR "binder: invalid inc strong " - "node for %d\n", node->debug_id); - return -EINVAL; - } - node->internal_strong_refs++; - } else - node->local_strong_refs++; - if (!node->has_strong_ref && target_list) { - list_del_init(&node->work.entry); - list_add_tail(&node->work.entry, target_list); - } - } else { - if (!internal) - node->local_weak_refs++; - if (!node->has_weak_ref && list_empty(&node->work.entry)) { - if (target_list == NULL) { - printk(KERN_ERR "binder: invalid inc weak node " - "for %d\n", node->debug_id); - return -EINVAL; - } - list_add_tail(&node->work.entry, target_list); - } - } - return 0; -} - -static int -binder_dec_node(struct binder_node *node, int strong, int internal) -{ - if (strong) { - if (internal) - node->internal_strong_refs--; - else - node->local_strong_refs--; - if (node->local_strong_refs || node->internal_strong_refs) - return 0; - } else { - if (!internal) - node->local_weak_refs--; - if (node->local_weak_refs || !hlist_empty(&node->refs)) - return 0; - } - if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { - if (list_empty(&node->work.entry)) { - list_add_tail(&node->work.entry, &node->proc->todo); - wake_up_interruptible(&node->proc->wait); - } - } else { - if (hlist_empty(&node->refs) && !node->local_strong_refs && - !node->local_weak_refs) { - list_del_init(&node->work.entry); - if (node->proc) { - rb_erase(&node->rb_node, &node->proc->nodes); - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: refless node %d deleted\n", node->debug_id); - } else { - hlist_del(&node->dead_node); - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: dead node %d deleted\n", node->debug_id); - } - kfree(node); - binder_stats.obj_deleted[BINDER_STAT_NODE]++; - } - } - - return 0; -} - - -static struct binder_ref * -binder_get_ref(struct binder_proc *proc, uint32_t desc) -{ - struct rb_node *n = proc->refs_by_desc.rb_node; - struct binder_ref *ref; - - while (n) { - ref = rb_entry(n, struct binder_ref, rb_node_desc); - - if (desc < ref->desc) - n = n->rb_left; - else if (desc > ref->desc) - n = n->rb_right; - else - return ref; - } - return NULL; -} - -static struct binder_ref * -binder_get_ref_for_node(struct binder_proc *proc, struct binder_node *node) -{ - struct rb_node *n; - struct rb_node **p = &proc->refs_by_node.rb_node; - struct rb_node *parent = NULL; - struct binder_ref *ref, *new_ref; - - while (*p) { - parent = *p; - ref = rb_entry(parent, struct binder_ref, rb_node_node); - - if (node < ref->node) - p = &(*p)->rb_left; - else if (node > ref->node) - p = &(*p)->rb_right; - else - return ref; - } - new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); - if (new_ref == NULL) - return NULL; - binder_stats.obj_created[BINDER_STAT_REF]++; - new_ref->debug_id = ++binder_last_id; - new_ref->proc = proc; - new_ref->node = node; - rb_link_node(&new_ref->rb_node_node, parent, p); - rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); - - new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1; - for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { - ref = rb_entry(n, struct binder_ref, rb_node_desc); - if (ref->desc > new_ref->desc) - break; - new_ref->desc = ref->desc + 1; - } - - p = &proc->refs_by_desc.rb_node; - while (*p) { - parent = *p; - ref = rb_entry(parent, struct binder_ref, rb_node_desc); - - if (new_ref->desc < ref->desc) - p = &(*p)->rb_left; - else if (new_ref->desc > ref->desc) - p = &(*p)->rb_right; - else - BUG(); - } - rb_link_node(&new_ref->rb_node_desc, parent, p); - rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); - if (node) { - hlist_add_head(&new_ref->node_entry, &node->refs); - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d new ref %d desc %d for " - "node %d\n", proc->pid, new_ref->debug_id, - new_ref->desc, node->debug_id); - } else { - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d new ref %d desc %d for " - "dead node\n", proc->pid, new_ref->debug_id, - new_ref->desc); - } - return new_ref; -} - -static void -binder_delete_ref(struct binder_ref *ref) -{ - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d delete ref %d desc %d for " - "node %d\n", ref->proc->pid, ref->debug_id, - ref->desc, ref->node->debug_id); - rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); - rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); - if (ref->strong) - binder_dec_node(ref->node, 1, 1); - hlist_del(&ref->node_entry); - binder_dec_node(ref->node, 0, 1); - if (ref->death) { - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder: %d delete ref %d desc %d " - "has death notification\n", ref->proc->pid, - ref->debug_id, ref->desc); - list_del(&ref->death->work.entry); - kfree(ref->death); - binder_stats.obj_deleted[BINDER_STAT_DEATH]++; - } - kfree(ref); - binder_stats.obj_deleted[BINDER_STAT_REF]++; -} - -static int -binder_inc_ref( - struct binder_ref *ref, int strong, struct list_head *target_list) -{ - int ret; - if (strong) { - if (ref->strong == 0) { - ret = binder_inc_node(ref->node, 1, 1, target_list); - if (ret) - return ret; - } - ref->strong++; - } else { - if (ref->weak == 0) { - ret = binder_inc_node(ref->node, 0, 1, target_list); - if (ret) - return ret; - } - ref->weak++; - } - return 0; -} - - -static int -binder_dec_ref(struct binder_ref *ref, int strong) -{ - if (strong) { - if (ref->strong == 0) { - binder_user_error("binder: %d invalid dec strong, " - "ref %d desc %d s %d w %d\n", - ref->proc->pid, ref->debug_id, - ref->desc, ref->strong, ref->weak); - return -EINVAL; - } - ref->strong--; - if (ref->strong == 0) { - int ret; - ret = binder_dec_node(ref->node, strong, 1); - if (ret) - return ret; - } - } else { - if (ref->weak == 0) { - binder_user_error("binder: %d invalid dec weak, " - "ref %d desc %d s %d w %d\n", - ref->proc->pid, ref->debug_id, - ref->desc, ref->strong, ref->weak); - return -EINVAL; - } - ref->weak--; - } - if (ref->strong == 0 && ref->weak == 0) - binder_delete_ref(ref); - return 0; -} - -static void -binder_pop_transaction( - struct binder_thread *target_thread, struct binder_transaction *t) -{ - if (target_thread) { - BUG_ON(target_thread->transaction_stack != t); - BUG_ON(target_thread->transaction_stack->from != target_thread); - target_thread->transaction_stack = - target_thread->transaction_stack->from_parent; - t->from = NULL; - } - t->need_reply = 0; - if (t->buffer) - t->buffer->transaction = NULL; - kfree(t); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++; -} - -static void -binder_send_failed_reply(struct binder_transaction *t, uint32_t error_code) -{ - struct binder_thread *target_thread; - BUG_ON(t->flags & TF_ONE_WAY); - while (1) { - target_thread = t->from; - if (target_thread) { - if (target_thread->return_error != BR_OK && - target_thread->return_error2 == BR_OK) { - target_thread->return_error2 = - target_thread->return_error; - target_thread->return_error = BR_OK; - } - if (target_thread->return_error == BR_OK) { - if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION) - printk(KERN_INFO "binder: send failed reply for transaction %d to %d:%d\n", - t->debug_id, target_thread->proc->pid, target_thread->pid); - - binder_pop_transaction(target_thread, t); - target_thread->return_error = error_code; - wake_up_interruptible(&target_thread->wait); - } else { - printk(KERN_ERR "binder: reply failed, target " - "thread, %d:%d, has error code %d " - "already\n", target_thread->proc->pid, - target_thread->pid, - target_thread->return_error); - } - return; - } else { - struct binder_transaction *next = t->from_parent; - - if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION) - printk(KERN_INFO "binder: send failed reply " - "for transaction %d, target dead\n", - t->debug_id); - - binder_pop_transaction(target_thread, t); - if (next == NULL) { - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder: reply failed," - " no target thread at root\n"); - return; - } - t = next; - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder: reply failed, no targ" - "et thread -- retry %d\n", t->debug_id); - } - } -} - -static void -binder_transaction_buffer_release(struct binder_proc *proc, - struct binder_buffer *buffer, size_t *failed_at); - -static void -binder_transaction(struct binder_proc *proc, struct binder_thread *thread, - struct binder_transaction_data *tr, int reply) -{ - struct binder_transaction *t; - struct binder_work *tcomplete; - size_t *offp, *off_end; - struct binder_proc *target_proc; - struct binder_thread *target_thread = NULL; - struct binder_node *target_node = NULL; - struct list_head *target_list; - wait_queue_head_t *target_wait; - struct binder_transaction *in_reply_to = NULL; - struct binder_transaction_log_entry *e; - uint32_t return_error; - - e = binder_transaction_log_add(&binder_transaction_log); - e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); - e->from_proc = proc->pid; - e->from_thread = thread->pid; - e->target_handle = tr->target.handle; - e->data_size = tr->data_size; - e->offsets_size = tr->offsets_size; - - if (reply) { - in_reply_to = thread->transaction_stack; - if (in_reply_to == NULL) { - binder_user_error("binder: %d:%d got reply transaction " - "with no transaction stack\n", - proc->pid, thread->pid); - return_error = BR_FAILED_REPLY; - goto err_empty_call_stack; - } - binder_set_nice(in_reply_to->saved_priority); - if (in_reply_to->to_thread != thread) { - binder_user_error("binder: %d:%d got reply transaction " - "with bad transaction stack," - " transaction %d has target %d:%d\n", - proc->pid, thread->pid, in_reply_to->debug_id, - in_reply_to->to_proc ? - in_reply_to->to_proc->pid : 0, - in_reply_to->to_thread ? - in_reply_to->to_thread->pid : 0); - return_error = BR_FAILED_REPLY; - in_reply_to = NULL; - goto err_bad_call_stack; - } - thread->transaction_stack = in_reply_to->to_parent; - target_thread = in_reply_to->from; - if (target_thread == NULL) { - return_error = BR_DEAD_REPLY; - goto err_dead_binder; - } - if (target_thread->transaction_stack != in_reply_to) { - binder_user_error("binder: %d:%d got reply transaction " - "with bad target transaction stack %d, " - "expected %d\n", - proc->pid, thread->pid, - target_thread->transaction_stack ? - target_thread->transaction_stack->debug_id : 0, - in_reply_to->debug_id); - return_error = BR_FAILED_REPLY; - in_reply_to = NULL; - target_thread = NULL; - goto err_dead_binder; - } - target_proc = target_thread->proc; - } else { - if (tr->target.handle) { - struct binder_ref *ref; - ref = binder_get_ref(proc, tr->target.handle); - if (ref == NULL) { - binder_user_error("binder: %d:%d got " - "transaction to invalid handle\n", - proc->pid, thread->pid); - return_error = BR_FAILED_REPLY; - goto err_invalid_target_handle; - } - target_node = ref->node; - } else { - target_node = binder_context_mgr_node; - if (target_node == NULL) { - return_error = BR_DEAD_REPLY; - goto err_no_context_mgr_node; - } - } - e->to_node = target_node->debug_id; - target_proc = target_node->proc; - if (target_proc == NULL) { - return_error = BR_DEAD_REPLY; - goto err_dead_binder; - } - if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { - struct binder_transaction *tmp; - tmp = thread->transaction_stack; - while (tmp) { - if (tmp->from && tmp->from->proc == target_proc) - target_thread = tmp->from; - tmp = tmp->from_parent; - } - } - } - if (target_thread) { - e->to_thread = target_thread->pid; - target_list = &target_thread->todo; - target_wait = &target_thread->wait; - } else { - target_list = &target_proc->todo; - target_wait = &target_proc->wait; - } - e->to_proc = target_proc->pid; - - /* TODO: reuse incoming transaction for reply */ - t = kzalloc(sizeof(*t), GFP_KERNEL); - if (t == NULL) { - return_error = BR_FAILED_REPLY; - goto err_alloc_t_failed; - } - binder_stats.obj_created[BINDER_STAT_TRANSACTION]++; - - tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); - if (tcomplete == NULL) { - return_error = BR_FAILED_REPLY; - goto err_alloc_tcomplete_failed; - } - binder_stats.obj_created[BINDER_STAT_TRANSACTION_COMPLETE]++; - - t->debug_id = ++binder_last_id; - e->debug_id = t->debug_id; - - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) { - if (reply) - printk(KERN_INFO "binder: %d:%d BC_REPLY %d -> %d:%d, " - "data %p-%p size %d-%d\n", - proc->pid, thread->pid, t->debug_id, - target_proc->pid, target_thread->pid, - tr->data.ptr.buffer, tr->data.ptr.offsets, - tr->data_size, tr->offsets_size); - else - printk(KERN_INFO "binder: %d:%d BC_TRANSACTION %d -> " - "%d - node %d, data %p-%p size %d-%d\n", - proc->pid, thread->pid, t->debug_id, - target_proc->pid, target_node->debug_id, - tr->data.ptr.buffer, tr->data.ptr.offsets, - tr->data_size, tr->offsets_size); - } - - if (!reply && !(tr->flags & TF_ONE_WAY)) - t->from = thread; - else - t->from = NULL; - t->sender_euid = proc->tsk->real_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; - } - off_end = (void *)offp + tr->offsets_size; - for (; offp < off_end; offp++) { - struct flat_binder_object *fp; - if (*offp > t->buffer->data_size - sizeof(*fp)) { - binder_user_error("binder: %d:%d got transaction with " - "invalid offset, %d\n", - proc->pid, thread->pid, *offp); - return_error = BR_FAILED_REPLY; - goto err_bad_offset; - } - fp = (struct flat_binder_object *)(t->buffer->data + *offp); - switch (fp->type) { - case BINDER_TYPE_BINDER: - case BINDER_TYPE_WEAK_BINDER: { - struct binder_ref *ref; - struct binder_node *node = binder_get_node(proc, fp->binder); - if (node == NULL) { - node = binder_new_node(proc, fp->binder, fp->cookie); - if (node == NULL) { - return_error = BR_FAILED_REPLY; - goto err_binder_new_node_failed; - } - node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK; - node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS); - } - if (fp->cookie != node->cookie) { - binder_user_error("binder: %d:%d sending u%p " - "node %d, cookie mismatch %p != %p\n", - proc->pid, thread->pid, - fp->binder, node->debug_id, - fp->cookie, node->cookie); - goto err_binder_get_ref_for_node_failed; - } - ref = binder_get_ref_for_node(target_proc, node); - if (ref == NULL) { - return_error = BR_FAILED_REPLY; - goto err_binder_get_ref_for_node_failed; - } - if (fp->type == BINDER_TYPE_BINDER) - fp->type = BINDER_TYPE_HANDLE; - else - fp->type = BINDER_TYPE_WEAK_HANDLE; - fp->handle = ref->desc; - binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE, &thread->todo); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " node %d u%p -> ref %d desc %d\n", - node->debug_id, node->ptr, ref->debug_id, ref->desc); - } break; - case BINDER_TYPE_HANDLE: - case BINDER_TYPE_WEAK_HANDLE: { - struct binder_ref *ref = binder_get_ref(proc, fp->handle); - if (ref == NULL) { - binder_user_error("binder: %d:%d got " - "transaction with invalid " - "handle, %ld\n", proc->pid, - thread->pid, fp->handle); - return_error = BR_FAILED_REPLY; - goto err_binder_get_ref_failed; - } - if (ref->node->proc == target_proc) { - if (fp->type == BINDER_TYPE_HANDLE) - fp->type = BINDER_TYPE_BINDER; - else - fp->type = BINDER_TYPE_WEAK_BINDER; - fp->binder = ref->node->ptr; - fp->cookie = ref->node->cookie; - binder_inc_node(ref->node, fp->type == BINDER_TYPE_BINDER, 0, NULL); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " ref %d desc %d -> node %d u%p\n", - ref->debug_id, ref->desc, ref->node->debug_id, ref->node->ptr); - } else { - struct binder_ref *new_ref; - new_ref = binder_get_ref_for_node(target_proc, ref->node); - if (new_ref == NULL) { - return_error = BR_FAILED_REPLY; - goto err_binder_get_ref_for_node_failed; - } - fp->handle = new_ref->desc; - binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " ref %d desc %d -> ref %d desc %d (node %d)\n", - ref->debug_id, ref->desc, new_ref->debug_id, new_ref->desc, ref->node->debug_id); - } - } break; - - case BINDER_TYPE_FD: { - int target_fd; - struct file *file; - - if (reply) { - if (!(in_reply_to->flags & TF_ACCEPT_FDS)) { - binder_user_error("binder: %d:%d got reply with fd, %ld, but target does not allow fds\n", - proc->pid, thread->pid, fp->handle); - return_error = BR_FAILED_REPLY; - goto err_fd_not_allowed; - } - } else if (!target_node->accept_fds) { - binder_user_error("binder: %d:%d got transaction with fd, %ld, but target does not allow fds\n", - proc->pid, thread->pid, fp->handle); - return_error = BR_FAILED_REPLY; - goto err_fd_not_allowed; - } - - file = fget(fp->handle); - if (file == NULL) { - binder_user_error("binder: %d:%d got transaction with invalid fd, %ld\n", - proc->pid, thread->pid, fp->handle); - return_error = BR_FAILED_REPLY; - goto err_fget_failed; - } - target_fd = task_get_unused_fd_flags(target_proc->tsk, O_CLOEXEC); - if (target_fd < 0) { - fput(file); - return_error = BR_FAILED_REPLY; - goto err_get_unused_fd_failed; - } - task_fd_install(target_proc->tsk, target_fd, file); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " fd %ld -> %d\n", fp->handle, target_fd); - /* TODO: fput? */ - fp->handle = target_fd; - } break; - - default: - binder_user_error("binder: %d:%d got transactio" - "n with invalid object type, %lx\n", - proc->pid, thread->pid, fp->type); - return_error = BR_FAILED_REPLY; - goto err_bad_object_type; - } - } - if (reply) { - BUG_ON(t->buffer->async_transaction != 0); - binder_pop_transaction(target_thread, in_reply_to); - } else if (!(t->flags & TF_ONE_WAY)) { - BUG_ON(t->buffer->async_transaction != 0); - t->need_reply = 1; - t->from_parent = thread->transaction_stack; - thread->transaction_stack = t; - } else { - BUG_ON(target_node == NULL); - BUG_ON(t->buffer->async_transaction != 1); - if (target_node->has_async_transaction) { - target_list = &target_node->async_todo; - target_wait = NULL; - } else - target_node->has_async_transaction = 1; - } - t->work.type = BINDER_WORK_TRANSACTION; - list_add_tail(&t->work.entry, target_list); - tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; - list_add_tail(&tcomplete->entry, &thread->todo); - if (target_wait) - wake_up_interruptible(target_wait); - return; - -err_get_unused_fd_failed: -err_fget_failed: -err_fd_not_allowed: -err_binder_get_ref_for_node_failed: -err_binder_get_ref_failed: -err_binder_new_node_failed: -err_bad_object_type: -err_bad_offset: -err_copy_data_failed: - binder_transaction_buffer_release(target_proc, t->buffer, offp); - t->buffer->transaction = NULL; - binder_free_buf(target_proc, t->buffer); -err_binder_alloc_buf_failed: - kfree(tcomplete); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++; -err_alloc_tcomplete_failed: - kfree(t); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++; -err_alloc_t_failed: -err_bad_call_stack: -err_empty_call_stack: -err_dead_binder: -err_invalid_target_handle: -err_no_context_mgr_node: - if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION) - printk(KERN_INFO "binder: %d:%d transaction failed %d, size %d-%d\n", - proc->pid, thread->pid, return_error, - tr->data_size, tr->offsets_size); - - { - struct binder_transaction_log_entry *fe; - fe = binder_transaction_log_add(&binder_transaction_log_failed); - *fe = *e; - } - - BUG_ON(thread->return_error != BR_OK); - if (in_reply_to) { - thread->return_error = BR_TRANSACTION_COMPLETE; - binder_send_failed_reply(in_reply_to, return_error); - } else - thread->return_error = return_error; -} - -static void -binder_transaction_buffer_release(struct binder_proc *proc, struct binder_buffer *buffer, size_t *failed_at) -{ - size_t *offp, *off_end; - int debug_id = buffer->debug_id; - - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO "binder: %d buffer release %d, size %d-%d, failed at %p\n", - proc->pid, buffer->debug_id, - buffer->data_size, buffer->offsets_size, failed_at); - - if (buffer->target_node) - binder_dec_node(buffer->target_node, 1, 0); - - offp = (size_t *)(buffer->data + ALIGN(buffer->data_size, sizeof(void *))); - if (failed_at) - off_end = failed_at; - else - off_end = (void *)offp + buffer->offsets_size; - for (; offp < off_end; offp++) { - struct flat_binder_object *fp; - if (*offp > buffer->data_size - sizeof(*fp)) { - printk(KERN_ERR "binder: transaction release %d bad offset %d, size %d\n", debug_id, *offp, buffer->data_size); - continue; - } - fp = (struct flat_binder_object *)(buffer->data + *offp); - switch (fp->type) { - case BINDER_TYPE_BINDER: - case BINDER_TYPE_WEAK_BINDER: { - struct binder_node *node = binder_get_node(proc, fp->binder); - if (node == NULL) { - printk(KERN_ERR "binder: transaction release %d bad node %p\n", debug_id, fp->binder); - break; - } - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " node %d u%p\n", - node->debug_id, node->ptr); - binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0); - } break; - case BINDER_TYPE_HANDLE: - case BINDER_TYPE_WEAK_HANDLE: { - struct binder_ref *ref = binder_get_ref(proc, fp->handle); - if (ref == NULL) { - printk(KERN_ERR "binder: transaction release %d bad handle %ld\n", debug_id, fp->handle); - break; - } - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " ref %d desc %d (node %d)\n", - ref->debug_id, ref->desc, ref->node->debug_id); - binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE); - } break; - - case BINDER_TYPE_FD: - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO " fd %ld\n", fp->handle); - if (failed_at) - task_close_fd(proc->tsk, fp->handle); - break; - - default: - printk(KERN_ERR "binder: transaction release %d bad object type %lx\n", debug_id, fp->type); - break; - } - } -} - -int -binder_thread_write(struct binder_proc *proc, struct binder_thread *thread, - void __user *buffer, int size, signed long *consumed) -{ - uint32_t cmd; - void __user *ptr = buffer + *consumed; - void __user *end = buffer + size; - - while (ptr < end && thread->return_error == BR_OK) { - if (get_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) { - binder_stats.bc[_IOC_NR(cmd)]++; - proc->stats.bc[_IOC_NR(cmd)]++; - thread->stats.bc[_IOC_NR(cmd)]++; - } - switch (cmd) { - case BC_INCREFS: - case BC_ACQUIRE: - case BC_RELEASE: - case BC_DECREFS: { - uint32_t target; - struct binder_ref *ref; - const char *debug_string; - - if (get_user(target, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (target == 0 && binder_context_mgr_node && - (cmd == BC_INCREFS || cmd == BC_ACQUIRE)) { - ref = binder_get_ref_for_node(proc, - binder_context_mgr_node); - if (ref->desc != target) { - binder_user_error("binder: %d:" - "%d tried to acquire " - "reference to desc 0, " - "got %d instead\n", - proc->pid, thread->pid, - ref->desc); - } - } else - ref = binder_get_ref(proc, target); - if (ref == NULL) { - binder_user_error("binder: %d:%d refcou" - "nt change on invalid ref %d\n", - proc->pid, thread->pid, target); - break; - } - switch (cmd) { - case BC_INCREFS: - debug_string = "IncRefs"; - binder_inc_ref(ref, 0, NULL); - break; - case BC_ACQUIRE: - debug_string = "Acquire"; - binder_inc_ref(ref, 1, NULL); - break; - case BC_RELEASE: - debug_string = "Release"; - binder_dec_ref(ref, 1); - break; - case BC_DECREFS: - default: - debug_string = "DecRefs"; - binder_dec_ref(ref, 0); - break; - } - if (binder_debug_mask & BINDER_DEBUG_USER_REFS) - printk(KERN_INFO "binder: %d:%d %s ref %d desc %d s %d w %d for node %d\n", - proc->pid, thread->pid, debug_string, ref->debug_id, ref->desc, ref->strong, ref->weak, ref->node->debug_id); - break; - } - case BC_INCREFS_DONE: - case BC_ACQUIRE_DONE: { - void __user *node_ptr; - void *cookie; - struct binder_node *node; - - if (get_user(node_ptr, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - if (get_user(cookie, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - node = binder_get_node(proc, node_ptr); - if (node == NULL) { - binder_user_error("binder: %d:%d " - "%s u%p no match\n", - proc->pid, thread->pid, - cmd == BC_INCREFS_DONE ? - "BC_INCREFS_DONE" : - "BC_ACQUIRE_DONE", - node_ptr); - break; - } - if (cookie != node->cookie) { - binder_user_error("binder: %d:%d %s u%p node %d" - " cookie mismatch %p != %p\n", - proc->pid, thread->pid, - cmd == BC_INCREFS_DONE ? - "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", - node_ptr, node->debug_id, - cookie, node->cookie); - break; - } - if (cmd == BC_ACQUIRE_DONE) { - if (node->pending_strong_ref == 0) { - binder_user_error("binder: %d:%d " - "BC_ACQUIRE_DONE node %d has " - "no pending acquire request\n", - proc->pid, thread->pid, - node->debug_id); - break; - } - node->pending_strong_ref = 0; - } else { - if (node->pending_weak_ref == 0) { - binder_user_error("binder: %d:%d " - "BC_INCREFS_DONE node %d has " - "no pending increfs request\n", - proc->pid, thread->pid, - node->debug_id); - break; - } - node->pending_weak_ref = 0; - } - binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); - if (binder_debug_mask & BINDER_DEBUG_USER_REFS) - printk(KERN_INFO "binder: %d:%d %s node %d ls %d lw %d\n", - proc->pid, thread->pid, cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", node->debug_id, node->local_strong_refs, node->local_weak_refs); - break; - } - case BC_ATTEMPT_ACQUIRE: - printk(KERN_ERR "binder: BC_ATTEMPT_ACQUIRE not supported\n"); - return -EINVAL; - case BC_ACQUIRE_RESULT: - printk(KERN_ERR "binder: BC_ACQUIRE_RESULT not supported\n"); - return -EINVAL; - - case BC_FREE_BUFFER: { - void __user *data_ptr; - struct binder_buffer *buffer; - - if (get_user(data_ptr, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - - buffer = binder_buffer_lookup(proc, data_ptr); - if (buffer == NULL) { - binder_user_error("binder: %d:%d " - "BC_FREE_BUFFER u%p no match\n", - proc->pid, thread->pid, data_ptr); - break; - } - if (!buffer->allow_user_free) { - binder_user_error("binder: %d:%d " - "BC_FREE_BUFFER u%p matched " - "unreturned buffer\n", - proc->pid, thread->pid, data_ptr); - break; - } - if (binder_debug_mask & BINDER_DEBUG_FREE_BUFFER) - printk(KERN_INFO "binder: %d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n", - proc->pid, thread->pid, data_ptr, buffer->debug_id, - buffer->transaction ? "active" : "finished"); - - if (buffer->transaction) { - buffer->transaction->buffer = NULL; - buffer->transaction = NULL; - } - if (buffer->async_transaction && buffer->target_node) { - BUG_ON(!buffer->target_node->has_async_transaction); - if (list_empty(&buffer->target_node->async_todo)) - buffer->target_node->has_async_transaction = 0; - else - list_move_tail(buffer->target_node->async_todo.next, &thread->todo); - } - binder_transaction_buffer_release(proc, buffer, NULL); - binder_free_buf(proc, buffer); - break; - } - - case BC_TRANSACTION: - case BC_REPLY: { - struct binder_transaction_data tr; - - if (copy_from_user(&tr, ptr, sizeof(tr))) - return -EFAULT; - ptr += sizeof(tr); - binder_transaction(proc, thread, &tr, cmd == BC_REPLY); - break; - } - - case BC_REGISTER_LOOPER: - if (binder_debug_mask & BINDER_DEBUG_THREADS) - printk(KERN_INFO "binder: %d:%d BC_REGISTER_LOOPER\n", - proc->pid, thread->pid); - if (thread->looper & BINDER_LOOPER_STATE_ENTERED) { - thread->looper |= BINDER_LOOPER_STATE_INVALID; - binder_user_error("binder: %d:%d ERROR:" - " BC_REGISTER_LOOPER called " - "after BC_ENTER_LOOPER\n", - proc->pid, thread->pid); - } else if (proc->requested_threads == 0) { - thread->looper |= BINDER_LOOPER_STATE_INVALID; - binder_user_error("binder: %d:%d ERROR:" - " BC_REGISTER_LOOPER called " - "without request\n", - proc->pid, thread->pid); - } else { - proc->requested_threads--; - proc->requested_threads_started++; - } - thread->looper |= BINDER_LOOPER_STATE_REGISTERED; - break; - case BC_ENTER_LOOPER: - if (binder_debug_mask & BINDER_DEBUG_THREADS) - printk(KERN_INFO "binder: %d:%d BC_ENTER_LOOPER\n", - proc->pid, thread->pid); - if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) { - thread->looper |= BINDER_LOOPER_STATE_INVALID; - binder_user_error("binder: %d:%d ERROR:" - " BC_ENTER_LOOPER called after " - "BC_REGISTER_LOOPER\n", - proc->pid, thread->pid); - } - thread->looper |= BINDER_LOOPER_STATE_ENTERED; - break; - case BC_EXIT_LOOPER: - if (binder_debug_mask & BINDER_DEBUG_THREADS) - printk(KERN_INFO "binder: %d:%d BC_EXIT_LOOPER\n", - proc->pid, thread->pid); - thread->looper |= BINDER_LOOPER_STATE_EXITED; - break; - - case BC_REQUEST_DEATH_NOTIFICATION: - case BC_CLEAR_DEATH_NOTIFICATION: { - uint32_t target; - void __user *cookie; - struct binder_ref *ref; - struct binder_ref_death *death; - - if (get_user(target, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (get_user(cookie, (void __user * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - ref = binder_get_ref(proc, target); - if (ref == NULL) { - binder_user_error("binder: %d:%d %s " - "invalid ref %d\n", - proc->pid, thread->pid, - cmd == BC_REQUEST_DEATH_NOTIFICATION ? - "BC_REQUEST_DEATH_NOTIFICATION" : - "BC_CLEAR_DEATH_NOTIFICATION", - target); - break; - } - - if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION) - printk(KERN_INFO "binder: %d:%d %s %p ref %d desc %d s %d w %d for node %d\n", - proc->pid, thread->pid, - cmd == BC_REQUEST_DEATH_NOTIFICATION ? - "BC_REQUEST_DEATH_NOTIFICATION" : - "BC_CLEAR_DEATH_NOTIFICATION", - cookie, ref->debug_id, ref->desc, - ref->strong, ref->weak, ref->node->debug_id); - - if (cmd == BC_REQUEST_DEATH_NOTIFICATION) { - if (ref->death) { - binder_user_error("binder: %d:%" - "d BC_REQUEST_DEATH_NOTI" - "FICATION death notific" - "ation already set\n", - proc->pid, thread->pid); - break; - } - death = kzalloc(sizeof(*death), GFP_KERNEL); - if (death == NULL) { - thread->return_error = BR_ERROR; - if (binder_debug_mask & BINDER_DEBUG_FAILED_TRANSACTION) - printk(KERN_INFO "binder: %d:%d " - "BC_REQUEST_DEATH_NOTIFICATION failed\n", - proc->pid, thread->pid); - break; - } - binder_stats.obj_created[BINDER_STAT_DEATH]++; - INIT_LIST_HEAD(&death->work.entry); - death->cookie = cookie; - ref->death = death; - if (ref->node->proc == NULL) { - ref->death->work.type = BINDER_WORK_DEAD_BINDER; - if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { - list_add_tail(&ref->death->work.entry, &thread->todo); - } else { - list_add_tail(&ref->death->work.entry, &proc->todo); - wake_up_interruptible(&proc->wait); - } - } - } else { - if (ref->death == NULL) { - binder_user_error("binder: %d:%" - "d BC_CLEAR_DEATH_NOTIFI" - "CATION death notificat" - "ion not active\n", - proc->pid, thread->pid); - break; - } - death = ref->death; - if (death->cookie != cookie) { - binder_user_error("binder: %d:%" - "d BC_CLEAR_DEATH_NOTIFI" - "CATION death notificat" - "ion cookie mismatch " - "%p != %p\n", - proc->pid, thread->pid, - death->cookie, cookie); - break; - } - ref->death = NULL; - if (list_empty(&death->work.entry)) { - death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; - if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { - list_add_tail(&death->work.entry, &thread->todo); - } else { - list_add_tail(&death->work.entry, &proc->todo); - wake_up_interruptible(&proc->wait); - } - } else { - BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER); - death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR; - } - } - } break; - case BC_DEAD_BINDER_DONE: { - struct binder_work *w; - void __user *cookie; - struct binder_ref_death *death = NULL; - if (get_user(cookie, (void __user * __user *)ptr)) - return -EFAULT; - - ptr += sizeof(void *); - list_for_each_entry(w, &proc->delivered_death, entry) { - struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); - if (tmp_death->cookie == cookie) { - death = tmp_death; - break; - } - } - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder: %d:%d BC_DEAD_BINDER_DONE %p found %p\n", - proc->pid, thread->pid, cookie, death); - if (death == NULL) { - binder_user_error("binder: %d:%d BC_DEAD" - "_BINDER_DONE %p not found\n", - proc->pid, thread->pid, cookie); - break; - } - - list_del_init(&death->work.entry); - if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) { - death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION; - if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { - list_add_tail(&death->work.entry, &thread->todo); - } else { - list_add_tail(&death->work.entry, &proc->todo); - wake_up_interruptible(&proc->wait); - } - } - } break; - - default: - printk(KERN_ERR "binder: %d:%d unknown command %d\n", proc->pid, thread->pid, cmd); - return -EINVAL; - } - *consumed = ptr - buffer; - } - return 0; -} - -void -binder_stat_br(struct binder_proc *proc, struct binder_thread *thread, uint32_t cmd) -{ - if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) { - binder_stats.br[_IOC_NR(cmd)]++; - proc->stats.br[_IOC_NR(cmd)]++; - thread->stats.br[_IOC_NR(cmd)]++; - } -} - -static int -binder_has_proc_work(struct binder_proc *proc, struct binder_thread *thread) -{ - return !list_empty(&proc->todo) || (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); -} - -static int -binder_has_thread_work(struct binder_thread *thread) -{ - return !list_empty(&thread->todo) || thread->return_error != BR_OK || - (thread->looper & BINDER_LOOPER_STATE_NEED_RETURN); -} - -static int -binder_thread_read(struct binder_proc *proc, struct binder_thread *thread, - void __user *buffer, int size, signed long *consumed, int non_block) -{ - void __user *ptr = buffer + *consumed; - void __user *end = buffer + size; - - int ret = 0; - int wait_for_proc_work; - - if (*consumed == 0) { - if (put_user(BR_NOOP, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - } - -retry: - wait_for_proc_work = thread->transaction_stack == NULL && list_empty(&thread->todo); - - if (thread->return_error != BR_OK && ptr < end) { - if (thread->return_error2 != BR_OK) { - if (put_user(thread->return_error2, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (ptr == end) - goto done; - thread->return_error2 = BR_OK; - } - if (put_user(thread->return_error, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - thread->return_error = BR_OK; - goto done; - } - - - thread->looper |= BINDER_LOOPER_STATE_WAITING; - if (wait_for_proc_work) - proc->ready_threads++; - mutex_unlock(&binder_lock); - if (wait_for_proc_work) { - if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | - BINDER_LOOPER_STATE_ENTERED))) { - binder_user_error("binder: %d:%d ERROR: Thread waiting " - "for process work before calling BC_REGISTER_" - "LOOPER or BC_ENTER_LOOPER (state %x)\n", - proc->pid, thread->pid, thread->looper); - wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); - } - binder_set_nice(proc->default_priority); - if (non_block) { - if (!binder_has_proc_work(proc, thread)) - ret = -EAGAIN; - } else - ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread)); - } else { - if (non_block) { - if (!binder_has_thread_work(thread)) - ret = -EAGAIN; - } else - ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread)); - } - mutex_lock(&binder_lock); - if (wait_for_proc_work) - proc->ready_threads--; - thread->looper &= ~BINDER_LOOPER_STATE_WAITING; - - if (ret) - return ret; - - while (1) { - uint32_t cmd; - struct binder_transaction_data tr; - struct binder_work *w; - struct binder_transaction *t = NULL; - - if (!list_empty(&thread->todo)) - w = list_first_entry(&thread->todo, struct binder_work, entry); - else if (!list_empty(&proc->todo) && wait_for_proc_work) - w = list_first_entry(&proc->todo, struct binder_work, entry); - else { - if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */ - goto retry; - break; - } - - if (end - ptr < sizeof(tr) + 4) - break; - - switch (w->type) { - case BINDER_WORK_TRANSACTION: { - t = container_of(w, struct binder_transaction, work); - } break; - case BINDER_WORK_TRANSACTION_COMPLETE: { - cmd = BR_TRANSACTION_COMPLETE; - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - - binder_stat_br(proc, thread, cmd); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION_COMPLETE) - printk(KERN_INFO "binder: %d:%d BR_TRANSACTION_COMPLETE\n", - proc->pid, thread->pid); - - list_del(&w->entry); - kfree(w); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++; - } break; - case BINDER_WORK_NODE: { - struct binder_node *node = container_of(w, struct binder_node, work); - uint32_t cmd = BR_NOOP; - const char *cmd_name; - int strong = node->internal_strong_refs || node->local_strong_refs; - int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; - if (weak && !node->has_weak_ref) { - cmd = BR_INCREFS; - cmd_name = "BR_INCREFS"; - node->has_weak_ref = 1; - node->pending_weak_ref = 1; - node->local_weak_refs++; - } else if (strong && !node->has_strong_ref) { - cmd = BR_ACQUIRE; - cmd_name = "BR_ACQUIRE"; - node->has_strong_ref = 1; - node->pending_strong_ref = 1; - node->local_strong_refs++; - } else if (!strong && node->has_strong_ref) { - cmd = BR_RELEASE; - cmd_name = "BR_RELEASE"; - node->has_strong_ref = 0; - } else if (!weak && node->has_weak_ref) { - cmd = BR_DECREFS; - cmd_name = "BR_DECREFS"; - node->has_weak_ref = 0; - } - if (cmd != BR_NOOP) { - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (put_user(node->ptr, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - if (put_user(node->cookie, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - - binder_stat_br(proc, thread, cmd); - if (binder_debug_mask & BINDER_DEBUG_USER_REFS) - printk(KERN_INFO "binder: %d:%d %s %d u%p c%p\n", - proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie); - } else { - list_del_init(&w->entry); - if (!weak && !strong) { - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d:%d node %d u%p c%p deleted\n", - proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie); - rb_erase(&node->rb_node, &proc->nodes); - kfree(node); - binder_stats.obj_deleted[BINDER_STAT_NODE]++; - } else { - if (binder_debug_mask & BINDER_DEBUG_INTERNAL_REFS) - printk(KERN_INFO "binder: %d:%d node %d u%p c%p state unchanged\n", - proc->pid, thread->pid, node->debug_id, node->ptr, node->cookie); - } - } - } break; - case BINDER_WORK_DEAD_BINDER: - case BINDER_WORK_DEAD_BINDER_AND_CLEAR: - case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { - struct binder_ref_death *death = container_of(w, struct binder_ref_death, work); - uint32_t cmd; - if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) - cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; - else - cmd = BR_DEAD_BINDER; - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (put_user(death->cookie, (void * __user *)ptr)) - return -EFAULT; - ptr += sizeof(void *); - if (binder_debug_mask & BINDER_DEBUG_DEATH_NOTIFICATION) - printk(KERN_INFO "binder: %d:%d %s %p\n", - proc->pid, thread->pid, - cmd == BR_DEAD_BINDER ? - "BR_DEAD_BINDER" : - "BR_CLEAR_DEATH_NOTIFICATION_DONE", - death->cookie); - - if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { - list_del(&w->entry); - kfree(death); - binder_stats.obj_deleted[BINDER_STAT_DEATH]++; - } else - list_move(&w->entry, &proc->delivered_death); - if (cmd == BR_DEAD_BINDER) - goto done; /* DEAD_BINDER notifications can cause transactions */ - } break; - } - - if (!t) - continue; - - BUG_ON(t->buffer == NULL); - if (t->buffer->target_node) { - struct binder_node *target_node = t->buffer->target_node; - tr.target.ptr = target_node->ptr; - tr.cookie = target_node->cookie; - t->saved_priority = task_nice(current); - if (t->priority < target_node->min_priority && - !(t->flags & TF_ONE_WAY)) - binder_set_nice(t->priority); - else if (!(t->flags & TF_ONE_WAY) || - t->saved_priority > target_node->min_priority) - binder_set_nice(target_node->min_priority); - cmd = BR_TRANSACTION; - } else { - tr.target.ptr = NULL; - tr.cookie = NULL; - cmd = BR_REPLY; - } - tr.code = t->code; - tr.flags = t->flags; - tr.sender_euid = t->sender_euid; - - if (t->from) { - struct task_struct *sender = t->from->proc->tsk; - tr.sender_pid = task_tgid_nr_ns(sender, current->nsproxy->pid_ns); - } else { - tr.sender_pid = 0; - } - - tr.data_size = t->buffer->data_size; - tr.offsets_size = t->buffer->offsets_size; - tr.data.ptr.buffer = (void *)((void *)t->buffer->data + proc->user_buffer_offset); - tr.data.ptr.offsets = tr.data.ptr.buffer + ALIGN(t->buffer->data_size, sizeof(void *)); - - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (copy_to_user(ptr, &tr, sizeof(tr))) - return -EFAULT; - ptr += sizeof(tr); - - binder_stat_br(proc, thread, cmd); - if (binder_debug_mask & BINDER_DEBUG_TRANSACTION) - printk(KERN_INFO "binder: %d:%d %s %d %d:%d, cmd %d size %d-%d ptr %p-%p\n", - proc->pid, thread->pid, - (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" : "BR_REPLY", - t->debug_id, t->from ? t->from->proc->pid : 0, - t->from ? t->from->pid : 0, cmd, - t->buffer->data_size, t->buffer->offsets_size, - tr.data.ptr.buffer, tr.data.ptr.offsets); - - list_del(&t->work.entry); - t->buffer->allow_user_free = 1; - if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { - t->to_parent = thread->transaction_stack; - t->to_thread = thread; - thread->transaction_stack = t; - } else { - t->buffer->transaction = NULL; - kfree(t); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION]++; - } - break; - } - -done: - - *consumed = ptr - buffer; - if (proc->requested_threads + proc->ready_threads == 0 && - proc->requested_threads_started < proc->max_threads && - (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | - BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ - /*spawn a new thread if we leave this out */) { - proc->requested_threads++; - if (binder_debug_mask & BINDER_DEBUG_THREADS) - printk(KERN_INFO "binder: %d:%d BR_SPAWN_LOOPER\n", - proc->pid, thread->pid); - if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) - return -EFAULT; - } - return 0; -} - -static void binder_release_work(struct list_head *list) -{ - struct binder_work *w; - while (!list_empty(list)) { - w = list_first_entry(list, struct binder_work, entry); - list_del_init(&w->entry); - switch (w->type) { - case BINDER_WORK_TRANSACTION: { - struct binder_transaction *t = container_of(w, struct binder_transaction, work); - if (t->buffer->target_node && !(t->flags & TF_ONE_WAY)) - binder_send_failed_reply(t, BR_DEAD_REPLY); - } break; - case BINDER_WORK_TRANSACTION_COMPLETE: { - kfree(w); - binder_stats.obj_deleted[BINDER_STAT_TRANSACTION_COMPLETE]++; - } break; - default: - break; - } - } - -} - -static struct binder_thread *binder_get_thread(struct binder_proc *proc) -{ - struct binder_thread *thread = NULL; - struct rb_node *parent = NULL; - struct rb_node **p = &proc->threads.rb_node; - - while (*p) { - parent = *p; - thread = rb_entry(parent, struct binder_thread, rb_node); - - if (current->pid < thread->pid) - p = &(*p)->rb_left; - else if (current->pid > thread->pid) - p = &(*p)->rb_right; - else - break; - } - if (*p == NULL) { - thread = kzalloc(sizeof(*thread), GFP_KERNEL); - if (thread == NULL) - return NULL; - binder_stats.obj_created[BINDER_STAT_THREAD]++; - thread->proc = proc; - thread->pid = current->pid; - init_waitqueue_head(&thread->wait); - INIT_LIST_HEAD(&thread->todo); - rb_link_node(&thread->rb_node, parent, p); - rb_insert_color(&thread->rb_node, &proc->threads); - thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; - thread->return_error = BR_OK; - thread->return_error2 = BR_OK; - } - return thread; -} - -static int binder_free_thread(struct binder_proc *proc, struct binder_thread *thread) -{ - struct binder_transaction *t; - struct binder_transaction *send_reply = NULL; - int active_transactions = 0; - - rb_erase(&thread->rb_node, &proc->threads); - t = thread->transaction_stack; - if (t && t->to_thread == thread) - send_reply = t; - while (t) { - active_transactions++; - if (binder_debug_mask & BINDER_DEBUG_DEAD_TRANSACTION) - printk(KERN_INFO "binder: release %d:%d transaction %d %s, still active\n", - proc->pid, thread->pid, t->debug_id, (t->to_thread == thread) ? "in" : "out"); - if (t->to_thread == thread) { - t->to_proc = NULL; - t->to_thread = NULL; - if (t->buffer) { - t->buffer->transaction = NULL; - t->buffer = NULL; - } - t = t->to_parent; - } else if (t->from == thread) { - t->from = NULL; - t = t->from_parent; - } else - BUG(); - } - if (send_reply) - binder_send_failed_reply(send_reply, BR_DEAD_REPLY); - binder_release_work(&thread->todo); - kfree(thread); - binder_stats.obj_deleted[BINDER_STAT_THREAD]++; - return active_transactions; -} - -static unsigned int binder_poll(struct file *filp, struct poll_table_struct *wait) -{ - struct binder_proc *proc = filp->private_data; - struct binder_thread *thread = NULL; - int wait_for_proc_work; - - mutex_lock(&binder_lock); - thread = binder_get_thread(proc); - - wait_for_proc_work = thread->transaction_stack == NULL && - list_empty(&thread->todo) && thread->return_error == BR_OK; - mutex_unlock(&binder_lock); - - if (wait_for_proc_work) { - if (binder_has_proc_work(proc, thread)) - return POLLIN; - poll_wait(filp, &proc->wait, wait); - if (binder_has_proc_work(proc, thread)) - return POLLIN; - } else { - if (binder_has_thread_work(thread)) - return POLLIN; - poll_wait(filp, &thread->wait, wait); - if (binder_has_thread_work(thread)) - return POLLIN; - } - return 0; -} - -static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - int ret; - struct binder_proc *proc = filp->private_data; - struct binder_thread *thread; - unsigned int size = _IOC_SIZE(cmd); - void __user *ubuf = (void __user *)arg; - - /*printk(KERN_INFO "binder_ioctl: %d:%d %x %lx\n", proc->pid, current->pid, cmd, arg);*/ - - ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); - if (ret) - return ret; - - mutex_lock(&binder_lock); - thread = binder_get_thread(proc); - if (thread == NULL) { - ret = -ENOMEM; - goto err; - } - - switch (cmd) { - case BINDER_WRITE_READ: { - struct binder_write_read bwr; - if (size != sizeof(struct binder_write_read)) { - ret = -EINVAL; - goto err; - } - if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { - ret = -EFAULT; - goto err; - } - if (binder_debug_mask & BINDER_DEBUG_READ_WRITE) - printk(KERN_INFO "binder: %d:%d write %ld at %08lx, read %ld at %08lx\n", - proc->pid, thread->pid, bwr.write_size, bwr.write_buffer, bwr.read_size, bwr.read_buffer); - if (bwr.write_size > 0) { - ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed); - if (ret < 0) { - bwr.read_consumed = 0; - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) - ret = -EFAULT; - goto err; - } - } - if (bwr.read_size > 0) { - ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK); - if (!list_empty(&proc->todo)) - wake_up_interruptible(&proc->wait); - if (ret < 0) { - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) - ret = -EFAULT; - goto err; - } - } - if (binder_debug_mask & BINDER_DEBUG_READ_WRITE) - printk(KERN_INFO "binder: %d:%d wrote %ld of %ld, read return %ld of %ld\n", - proc->pid, thread->pid, bwr.write_consumed, bwr.write_size, bwr.read_consumed, bwr.read_size); - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { - ret = -EFAULT; - goto err; - } - break; - } - case BINDER_SET_MAX_THREADS: - if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) { - ret = -EINVAL; - goto err; - } - break; - case BINDER_SET_CONTEXT_MGR: - if (binder_context_mgr_node != NULL) { - printk(KERN_ERR "binder: BINDER_SET_CONTEXT_MGR already set\n"); - ret = -EBUSY; - goto err; - } - if (binder_context_mgr_uid != -1) { - if (binder_context_mgr_uid != current->real_cred->euid) { - printk(KERN_ERR "binder: BINDER_SET_" - "CONTEXT_MGR bad uid %d != %d\n", - current->real_cred->euid, - binder_context_mgr_uid); - ret = -EPERM; - goto err; - } - } else - binder_context_mgr_uid = current->real_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: - if (binder_debug_mask & BINDER_DEBUG_THREADS) - printk(KERN_INFO "binder: %d:%d exit\n", - proc->pid, thread->pid); - binder_free_thread(proc, thread); - thread = NULL; - break; - case BINDER_VERSION: - if (size != sizeof(struct binder_version)) { - ret = -EINVAL; - goto err; - } - if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) { - ret = -EINVAL; - goto err; - } - break; - default: - ret = -EINVAL; - goto err; - } - ret = 0; -err: - if (thread) - thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; - mutex_unlock(&binder_lock); - wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); - if (ret && ret != -ERESTARTSYS) - printk(KERN_INFO "binder: %d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); - return ret; -} - -static void binder_vma_open(struct vm_area_struct *vma) -{ - struct binder_proc *proc = vma->vm_private_data; - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder: %d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot); - dump_stack(); -} -static void binder_vma_close(struct vm_area_struct *vma) -{ - struct binder_proc *proc = vma->vm_private_data; - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder: %d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot); - proc->vma = NULL; -} - -static struct vm_operations_struct binder_vm_ops = { - .open = binder_vma_open, - .close = binder_vma_close, -}; - -static int binder_mmap(struct file *filp, struct vm_area_struct *vma) -{ - int ret; - struct vm_struct *area; - struct binder_proc *proc = filp->private_data; - const char *failure_string; - struct binder_buffer *buffer; - - if ((vma->vm_end - vma->vm_start) > SZ_4M) - vma->vm_end = vma->vm_start + SZ_4M; - - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", proc->pid, vma->vm_start, vma->vm_end, (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, vma->vm_page_prot); - - if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { - ret = -EPERM; - failure_string = "bad vm_flags"; - goto err_bad_arg; - } - vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; - - area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); - if (area == NULL) { - ret = -ENOMEM; - failure_string = "get_vm_area"; - goto err_get_vm_area_failed; - } - proc->buffer = area->addr; - proc->user_buffer_offset = vma->vm_start - (size_t)proc->buffer; - -#if defined(CONFIG_CPU_CACHE_VIPT) && !defined(CONFIG_CPU_S3C6410) - if (cache_is_vipt_aliasing()) { - while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) { - printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer); - vma->vm_start += PAGE_SIZE; - } - } -#endif - proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL); - if (proc->pages == NULL) { - ret = -ENOMEM; - failure_string = "alloc page array"; - goto err_alloc_pages_failed; - } - proc->buffer_size = vma->vm_end - vma->vm_start; - - vma->vm_ops = &binder_vm_ops; - vma->vm_private_data = proc; - - if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) { - ret = -ENOMEM; - failure_string = "alloc small buf"; - goto err_alloc_small_buf_failed; - } - buffer = proc->buffer; - INIT_LIST_HEAD(&proc->buffers); - list_add(&buffer->entry, &proc->buffers); - buffer->free = 1; - binder_insert_free_buffer(proc, buffer); - proc->free_async_space = proc->buffer_size / 2; - barrier(); - proc->vma = vma; - - /*printk(KERN_INFO "binder_mmap: %d %lx-%lx maps %p\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/ - return 0; - -err_alloc_small_buf_failed: - kfree(proc->pages); -err_alloc_pages_failed: - vfree(proc->buffer); -err_get_vm_area_failed: - mutex_unlock(&binder_lock); -err_bad_arg: - printk(KERN_ERR "binder_mmap: %d %lx-%lx %s failed %d\n", proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); - return ret; -} - -static int binder_open(struct inode *nodp, struct file *filp) -{ - struct binder_proc *proc; - - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder_open: %d:%d\n", current->group_leader->pid, current->pid); - - proc = kzalloc(sizeof(*proc), GFP_KERNEL); - if (proc == NULL) - return -ENOMEM; - get_task_struct(current); - proc->tsk = current; - INIT_LIST_HEAD(&proc->todo); - init_waitqueue_head(&proc->wait); - proc->default_priority = task_nice(current); - mutex_lock(&binder_lock); - binder_stats.obj_created[BINDER_STAT_PROC]++; - hlist_add_head(&proc->proc_node, &binder_procs); - proc->pid = current->group_leader->pid; - INIT_LIST_HEAD(&proc->delivered_death); - filp->private_data = proc; - mutex_unlock(&binder_lock); - - if (binder_proc_dir_entry_proc) { - char strbuf[11]; - snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); - create_proc_read_entry(strbuf, S_IRUGO, binder_proc_dir_entry_proc, binder_read_proc_proc, proc); - } - - return 0; -} - -static int binder_flush(struct file *filp, fl_owner_t id) -{ - struct rb_node *n; - struct binder_proc *proc = filp->private_data; - int wake_count = 0; - - mutex_lock(&binder_lock); - for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { - struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); - thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; - if (thread->looper & BINDER_LOOPER_STATE_WAITING) { - wake_up_interruptible(&thread->wait); - wake_count++; - } - } - wake_up_interruptible_all(&proc->wait); - mutex_unlock(&binder_lock); - - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder_flush: %d woke %d threads\n", proc->pid, wake_count); - - return 0; -} - -static int binder_release(struct inode *nodp, struct file *filp) -{ - struct hlist_node *pos; - struct binder_transaction *t; - struct rb_node *n; - struct binder_proc *proc = filp->private_data; - int threads, nodes, incoming_refs, outgoing_refs, buffers, active_transactions, page_count; - - if (binder_proc_dir_entry_proc) { - char strbuf[11]; - snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); - remove_proc_entry(strbuf, binder_proc_dir_entry_proc); - } - mutex_lock(&binder_lock); - hlist_del(&proc->proc_node); - if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) { - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder_release: %d context_mgr_node gone\n", proc->pid); - binder_context_mgr_node = NULL; - } - - threads = 0; - active_transactions = 0; - while ((n = rb_first(&proc->threads))) { - struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); - threads++; - active_transactions += binder_free_thread(proc, thread); - } - nodes = 0; - incoming_refs = 0; - while ((n = rb_first(&proc->nodes))) { - struct binder_node *node = rb_entry(n, struct binder_node, rb_node); - - nodes++; - rb_erase(&node->rb_node, &proc->nodes); - list_del_init(&node->work.entry); - if (hlist_empty(&node->refs)) { - kfree(node); - binder_stats.obj_deleted[BINDER_STAT_NODE]++; - } else { - struct binder_ref *ref; - int death = 0; - - node->proc = NULL; - node->local_strong_refs = 0; - node->local_weak_refs = 0; - hlist_add_head(&node->dead_node, &binder_dead_nodes); - - hlist_for_each_entry(ref, pos, &node->refs, node_entry) { - incoming_refs++; - if (ref->death) { - death++; - if (list_empty(&ref->death->work.entry)) { - ref->death->work.type = BINDER_WORK_DEAD_BINDER; - list_add_tail(&ref->death->work.entry, &ref->proc->todo); - wake_up_interruptible(&ref->proc->wait); - } else - BUG(); - } - } - if (binder_debug_mask & BINDER_DEBUG_DEAD_BINDER) - printk(KERN_INFO "binder: node %d now dead, refs %d, death %d\n", node->debug_id, incoming_refs, death); - } - } - outgoing_refs = 0; - while ((n = rb_first(&proc->refs_by_desc))) { - struct binder_ref *ref = rb_entry(n, struct binder_ref, rb_node_desc); - outgoing_refs++; - binder_delete_ref(ref); - } - binder_release_work(&proc->todo); - buffers = 0; - - while ((n = rb_first(&proc->allocated_buffers))) { - struct binder_buffer *buffer = rb_entry(n, struct binder_buffer, rb_node); - t = buffer->transaction; - if (t) { - t->buffer = NULL; - buffer->transaction = NULL; - printk(KERN_ERR "binder: release proc %d, transaction %d, not freed\n", proc->pid, t->debug_id); - /*BUG();*/ - } - binder_free_buf(proc, buffer); - buffers++; - } - - binder_stats.obj_deleted[BINDER_STAT_PROC]++; - mutex_unlock(&binder_lock); - - page_count = 0; - if (proc->pages) { - int i; - for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) { - if (proc->pages[i]) { - if (binder_debug_mask & BINDER_DEBUG_BUFFER_ALLOC) - printk(KERN_INFO "binder_release: %d: page %d at %p not freed\n", proc->pid, i, proc->buffer + i * PAGE_SIZE); - __free_page(proc->pages[i]); - page_count++; - } - } - kfree(proc->pages); - vfree(proc->buffer); - } - - put_task_struct(proc->tsk); - - if (binder_debug_mask & BINDER_DEBUG_OPEN_CLOSE) - printk(KERN_INFO "binder_release: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n", - proc->pid, threads, nodes, incoming_refs, outgoing_refs, active_transactions, buffers, page_count); - - kfree(proc); - return 0; -} - -static char *print_binder_transaction(char *buf, char *end, const char *prefix, struct binder_transaction *t) -{ - buf += snprintf(buf, end - buf, "%s %d: %p from %d:%d to %d:%d code %x flags %x pri %ld r%d", - prefix, t->debug_id, t, t->from ? t->from->proc->pid : 0, - t->from ? t->from->pid : 0, - t->to_proc ? t->to_proc->pid : 0, - t->to_thread ? t->to_thread->pid : 0, - t->code, t->flags, t->priority, t->need_reply); - if (buf >= end) - return buf; - if (t->buffer == NULL) { - buf += snprintf(buf, end - buf, " buffer free\n"); - return buf; - } - if (t->buffer->target_node) { - buf += snprintf(buf, end - buf, " node %d", - t->buffer->target_node->debug_id); - if (buf >= end) - return buf; - } - buf += snprintf(buf, end - buf, " size %d:%d data %p\n", - t->buffer->data_size, t->buffer->offsets_size, - t->buffer->data); - return buf; -} - -static char *print_binder_buffer(char *buf, char *end, const char *prefix, struct binder_buffer *buffer) -{ - buf += snprintf(buf, end - buf, "%s %d: %p size %d:%d %s\n", - prefix, buffer->debug_id, buffer->data, - buffer->data_size, buffer->offsets_size, - buffer->transaction ? "active" : "delivered"); - return buf; -} - -static char *print_binder_work(char *buf, char *end, const char *prefix, - const char *transaction_prefix, struct binder_work *w) -{ - struct binder_node *node; - struct binder_transaction *t; - - switch (w->type) { - case BINDER_WORK_TRANSACTION: - t = container_of(w, struct binder_transaction, work); - buf = print_binder_transaction(buf, end, transaction_prefix, t); - break; - case BINDER_WORK_TRANSACTION_COMPLETE: - buf += snprintf(buf, end - buf, - "%stransaction complete\n", prefix); - break; - case BINDER_WORK_NODE: - node = container_of(w, struct binder_node, work); - buf += snprintf(buf, end - buf, "%snode work %d: u%p c%p\n", - prefix, node->debug_id, node->ptr, node->cookie); - break; - case BINDER_WORK_DEAD_BINDER: - buf += snprintf(buf, end - buf, "%shas dead binder\n", prefix); - break; - case BINDER_WORK_DEAD_BINDER_AND_CLEAR: - buf += snprintf(buf, end - buf, - "%shas cleared dead binder\n", prefix); - break; - case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: - buf += snprintf(buf, end - buf, - "%shas cleared death notification\n", prefix); - break; - default: - buf += snprintf(buf, end - buf, "%sunknown work: type %d\n", - prefix, w->type); - break; - } - return buf; -} - -static char *print_binder_thread(char *buf, char *end, struct binder_thread *thread, int print_always) -{ - struct binder_transaction *t; - struct binder_work *w; - char *start_buf = buf; - char *header_buf; - - buf += snprintf(buf, end - buf, " thread %d: l %02x\n", thread->pid, thread->looper); - header_buf = buf; - t = thread->transaction_stack; - while (t) { - if (buf >= end) - break; - if (t->from == thread) { - buf = print_binder_transaction(buf, end, " outgoing transaction", t); - t = t->from_parent; - } else if (t->to_thread == thread) { - buf = print_binder_transaction(buf, end, " incoming transaction", t); - t = t->to_parent; - } else { - buf = print_binder_transaction(buf, end, " bad transaction", t); - t = NULL; - } - } - list_for_each_entry(w, &thread->todo, entry) { - if (buf >= end) - break; - buf = print_binder_work(buf, end, " ", - " pending transaction", w); - } - if (!print_always && buf == header_buf) - buf = start_buf; - return buf; -} - -static char *print_binder_node(char *buf, char *end, struct binder_node *node) -{ - struct binder_ref *ref; - struct hlist_node *pos; - struct binder_work *w; - int count; - count = 0; - hlist_for_each_entry(ref, pos, &node->refs, node_entry) - count++; - - buf += snprintf(buf, end - buf, " node %d: u%p c%p hs %d hw %d ls %d lw %d is %d iw %d", - node->debug_id, node->ptr, node->cookie, - node->has_strong_ref, node->has_weak_ref, - node->local_strong_refs, node->local_weak_refs, - node->internal_strong_refs, count); - if (buf >= end) - return buf; - if (count) { - buf += snprintf(buf, end - buf, " proc"); - if (buf >= end) - return buf; - hlist_for_each_entry(ref, pos, &node->refs, node_entry) { - buf += snprintf(buf, end - buf, " %d", ref->proc->pid); - if (buf >= end) - return buf; - } - } - buf += snprintf(buf, end - buf, "\n"); - list_for_each_entry(w, &node->async_todo, entry) { - if (buf >= end) - break; - buf = print_binder_work(buf, end, " ", - " pending async transaction", w); - } - return buf; -} - -static char *print_binder_ref(char *buf, char *end, struct binder_ref *ref) -{ - buf += snprintf(buf, end - buf, " ref %d: desc %d %snode %d s %d w %d d %p\n", - ref->debug_id, ref->desc, ref->node->proc ? "" : "dead ", - ref->node->debug_id, ref->strong, ref->weak, ref->death); - return buf; -} - -static char *print_binder_proc(char *buf, char *end, struct binder_proc *proc, int print_all) -{ - struct binder_work *w; - struct rb_node *n; - char *start_buf = buf; - char *header_buf; - - buf += snprintf(buf, end - buf, "proc %d\n", proc->pid); - header_buf = buf; - - for (n = rb_first(&proc->threads); n != NULL && buf < end; n = rb_next(n)) - buf = print_binder_thread(buf, end, rb_entry(n, struct binder_thread, rb_node), print_all); - for (n = rb_first(&proc->nodes); n != NULL && buf < end; n = rb_next(n)) { - struct binder_node *node = rb_entry(n, struct binder_node, rb_node); - if (print_all || node->has_async_transaction) - buf = print_binder_node(buf, end, node); - } - if (print_all) { - for (n = rb_first(&proc->refs_by_desc); n != NULL && buf < end; n = rb_next(n)) - buf = print_binder_ref(buf, end, rb_entry(n, struct binder_ref, rb_node_desc)); - } - for (n = rb_first(&proc->allocated_buffers); n != NULL && buf < end; n = rb_next(n)) - buf = print_binder_buffer(buf, end, " buffer", rb_entry(n, struct binder_buffer, rb_node)); - list_for_each_entry(w, &proc->todo, entry) { - if (buf >= end) - break; - buf = print_binder_work(buf, end, " ", - " pending transaction", w); - } - list_for_each_entry(w, &proc->delivered_death, entry) { - if (buf >= end) - break; - buf += snprintf(buf, end - buf, " has delivered dead binder\n"); - break; - } - if (!print_all && buf == header_buf) - buf = start_buf; - return buf; -} - -static const char *binder_return_strings[] = { - "BR_ERROR", - "BR_OK", - "BR_TRANSACTION", - "BR_REPLY", - "BR_ACQUIRE_RESULT", - "BR_DEAD_REPLY", - "BR_TRANSACTION_COMPLETE", - "BR_INCREFS", - "BR_ACQUIRE", - "BR_RELEASE", - "BR_DECREFS", - "BR_ATTEMPT_ACQUIRE", - "BR_NOOP", - "BR_SPAWN_LOOPER", - "BR_FINISHED", - "BR_DEAD_BINDER", - "BR_CLEAR_DEATH_NOTIFICATION_DONE", - "BR_FAILED_REPLY" -}; - -static const char *binder_command_strings[] = { - "BC_TRANSACTION", - "BC_REPLY", - "BC_ACQUIRE_RESULT", - "BC_FREE_BUFFER", - "BC_INCREFS", - "BC_ACQUIRE", - "BC_RELEASE", - "BC_DECREFS", - "BC_INCREFS_DONE", - "BC_ACQUIRE_DONE", - "BC_ATTEMPT_ACQUIRE", - "BC_REGISTER_LOOPER", - "BC_ENTER_LOOPER", - "BC_EXIT_LOOPER", - "BC_REQUEST_DEATH_NOTIFICATION", - "BC_CLEAR_DEATH_NOTIFICATION", - "BC_DEAD_BINDER_DONE" -}; - -static const char *binder_objstat_strings[] = { - "proc", - "thread", - "node", - "ref", - "death", - "transaction", - "transaction_complete" -}; - -static char *print_binder_stats(char *buf, char *end, const char *prefix, struct binder_stats *stats) -{ - int i; - - BUILD_BUG_ON(ARRAY_SIZE(stats->bc) != ARRAY_SIZE(binder_command_strings)); - for (i = 0; i < ARRAY_SIZE(stats->bc); i++) { - if (stats->bc[i]) - buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix, - binder_command_strings[i], stats->bc[i]); - if (buf >= end) - return buf; - } - - BUILD_BUG_ON(ARRAY_SIZE(stats->br) != ARRAY_SIZE(binder_return_strings)); - for (i = 0; i < ARRAY_SIZE(stats->br); i++) { - if (stats->br[i]) - buf += snprintf(buf, end - buf, "%s%s: %d\n", prefix, - binder_return_strings[i], stats->br[i]); - if (buf >= end) - return buf; - } - - BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != ARRAY_SIZE(binder_objstat_strings)); - BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) != ARRAY_SIZE(stats->obj_deleted)); - for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) { - if (stats->obj_created[i] || stats->obj_deleted[i]) - buf += snprintf(buf, end - buf, "%s%s: active %d total %d\n", prefix, - binder_objstat_strings[i], - stats->obj_created[i] - stats->obj_deleted[i], - stats->obj_created[i]); - if (buf >= end) - return buf; - } - return buf; -} - -static char *print_binder_proc_stats(char *buf, char *end, struct binder_proc *proc) -{ - struct binder_work *w; - struct rb_node *n; - int count, strong, weak; - - buf += snprintf(buf, end - buf, "proc %d\n", proc->pid); - if (buf >= end) - return buf; - count = 0; - for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) - count++; - buf += snprintf(buf, end - buf, " threads: %d\n", count); - if (buf >= end) - return buf; - buf += snprintf(buf, end - buf, " requested threads: %d+%d/%d\n" - " ready threads %d\n" - " free async space %d\n", proc->requested_threads, - proc->requested_threads_started, proc->max_threads, - proc->ready_threads, proc->free_async_space); - if (buf >= end) - return buf; - count = 0; - for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) - count++; - buf += snprintf(buf, end - buf, " nodes: %d\n", count); - if (buf >= end) - return buf; - count = 0; - strong = 0; - weak = 0; - for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { - struct binder_ref *ref = rb_entry(n, struct binder_ref, rb_node_desc); - count++; - strong += ref->strong; - weak += ref->weak; - } - buf += snprintf(buf, end - buf, " refs: %d s %d w %d\n", count, strong, weak); - if (buf >= end) - return buf; - - count = 0; - for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) - count++; - buf += snprintf(buf, end - buf, " buffers: %d\n", count); - if (buf >= end) - return buf; - - count = 0; - list_for_each_entry(w, &proc->todo, entry) { - switch (w->type) { - case BINDER_WORK_TRANSACTION: - count++; - break; - default: - break; - } - } - buf += snprintf(buf, end - buf, " pending transactions: %d\n", count); - if (buf >= end) - return buf; - - buf = print_binder_stats(buf, end, " ", &proc->stats); - - return buf; -} - - -static int binder_read_proc_state( - char *page, char **start, off_t off, int count, int *eof, void *data) -{ - struct binder_proc *proc; - struct hlist_node *pos; - struct binder_node *node; - int len = 0; - char *buf = page; - char *end = page + PAGE_SIZE; - int do_lock = !binder_debug_no_lock; - - if (off) - return 0; - - if (do_lock) - mutex_lock(&binder_lock); - - buf += snprintf(buf, end - buf, "binder state:\n"); - - if (!hlist_empty(&binder_dead_nodes)) - buf += snprintf(buf, end - buf, "dead nodes:\n"); - hlist_for_each_entry(node, pos, &binder_dead_nodes, dead_node) { - if (buf >= end) - break; - buf = print_binder_node(buf, end, node); - } - - hlist_for_each_entry(proc, pos, &binder_procs, proc_node) { - if (buf >= end) - break; - buf = print_binder_proc(buf, end, proc, 1); - } - if (do_lock) - mutex_unlock(&binder_lock); - if (buf > page + PAGE_SIZE) - buf = page + PAGE_SIZE; - - *start = page + off; - - len = buf - page; - if (len > off) - len -= off; - else - len = 0; - - return len < count ? len : count; -} - -static int binder_read_proc_stats( - char *page, char **start, off_t off, int count, int *eof, void *data) -{ - struct binder_proc *proc; - struct hlist_node *pos; - int len = 0; - char *p = page; - int do_lock = !binder_debug_no_lock; - - if (off) - return 0; - - if (do_lock) - mutex_lock(&binder_lock); - - p += snprintf(p, PAGE_SIZE, "binder stats:\n"); - - p = print_binder_stats(p, page + PAGE_SIZE, "", &binder_stats); - - hlist_for_each_entry(proc, pos, &binder_procs, proc_node) { - if (p >= page + PAGE_SIZE) - break; - p = print_binder_proc_stats(p, page + PAGE_SIZE, proc); - } - if (do_lock) - mutex_unlock(&binder_lock); - if (p > page + PAGE_SIZE) - p = page + PAGE_SIZE; - - *start = page + off; - - len = p - page; - if (len > off) - len -= off; - else - len = 0; - - return len < count ? len : count; -} - -static int binder_read_proc_transactions( - char *page, char **start, off_t off, int count, int *eof, void *data) -{ - struct binder_proc *proc; - struct hlist_node *pos; - int len = 0; - char *buf = page; - char *end = page + PAGE_SIZE; - int do_lock = !binder_debug_no_lock; - - if (off) - return 0; - - if (do_lock) - mutex_lock(&binder_lock); - - buf += snprintf(buf, end - buf, "binder transactions:\n"); - hlist_for_each_entry(proc, pos, &binder_procs, proc_node) { - if (buf >= end) - break; - buf = print_binder_proc(buf, end, proc, 0); - } - if (do_lock) - mutex_unlock(&binder_lock); - if (buf > page + PAGE_SIZE) - buf = page + PAGE_SIZE; - - *start = page + off; - - len = buf - page; - if (len > off) - len -= off; - else - len = 0; - - return len < count ? len : count; -} - -static int binder_read_proc_proc( - char *page, char **start, off_t off, int count, int *eof, void *data) -{ - struct binder_proc *proc = data; - int len = 0; - char *p = page; - int do_lock = !binder_debug_no_lock; - - if (off) - return 0; - - if (do_lock) - mutex_lock(&binder_lock); - p += snprintf(p, PAGE_SIZE, "binder proc state:\n"); - p = print_binder_proc(p, page + PAGE_SIZE, proc, 1); - if (do_lock) - mutex_unlock(&binder_lock); - - if (p > page + PAGE_SIZE) - p = page + PAGE_SIZE; - *start = page + off; - - len = p - page; - if (len > off) - len -= off; - else - len = 0; - - return len < count ? len : count; -} - -static char *print_binder_transaction_log_entry(char *buf, char *end, struct binder_transaction_log_entry *e) -{ - buf += snprintf(buf, end - buf, "%d: %s from %d:%d to %d:%d node %d handle %d size %d:%d\n", - e->debug_id, (e->call_type == 2) ? "reply" : - ((e->call_type == 1) ? "async" : "call "), e->from_proc, - e->from_thread, e->to_proc, e->to_thread, e->to_node, - e->target_handle, e->data_size, e->offsets_size); - return buf; -} - -static int binder_read_proc_transaction_log( - char *page, char **start, off_t off, int count, int *eof, void *data) -{ - struct binder_transaction_log *log = data; - int len = 0; - int i; - char *buf = page; - char *end = page + PAGE_SIZE; - - if (off) - return 0; - - if (log->full) { - for (i = log->next; i < ARRAY_SIZE(log->entry); i++) { - if (buf >= end) - break; - buf = print_binder_transaction_log_entry(buf, end, &log->entry[i]); - } - } - for (i = 0; i < log->next; i++) { - if (buf >= end) - break; - buf = print_binder_transaction_log_entry(buf, end, &log->entry[i]); - } - - *start = page + off; - - len = buf - page; - if (len > off) - len -= off; - else - len = 0; - - return len < count ? len : count; -} - -static struct file_operations binder_fops = { - .owner = THIS_MODULE, - .poll = binder_poll, - .unlocked_ioctl = binder_ioctl, - .mmap = binder_mmap, - .open = binder_open, - .flush = binder_flush, - .release = binder_release, -}; - -static struct miscdevice binder_miscdev = { - .minor = MISC_DYNAMIC_MINOR, - .name = "binder", - .fops = &binder_fops -}; - -static int __init binder_init(void) -{ - int ret; - - binder_proc_dir_entry_root = proc_mkdir("binder", NULL); - if (binder_proc_dir_entry_root) - binder_proc_dir_entry_proc = proc_mkdir("proc", binder_proc_dir_entry_root); - ret = misc_register(&binder_miscdev); - if (binder_proc_dir_entry_root) { - create_proc_read_entry("state", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_state, NULL); - create_proc_read_entry("stats", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_stats, NULL); - create_proc_read_entry("transactions", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transactions, NULL); - create_proc_read_entry("transaction_log", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transaction_log, &binder_transaction_log); - create_proc_read_entry("failed_transaction_log", S_IRUGO, binder_proc_dir_entry_root, binder_read_proc_transaction_log, &binder_transaction_log_failed); - } - return ret; -} - -device_initcall(binder_init); - |