diff options
Diffstat (limited to 'drivers/staging/android')
| -rw-r--r-- | drivers/staging/android/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/staging/android/Makefile | 1 | ||||
| -rw-r--r-- | drivers/staging/android/TODO | 7 | ||||
| -rw-r--r-- | drivers/staging/android/ashmem.c | 5 | ||||
| -rw-r--r-- | drivers/staging/android/binder.c | 3673 | ||||
| -rw-r--r-- | drivers/staging/android/binder.h | 30 | ||||
| -rw-r--r-- | drivers/staging/android/binder_trace.h | 329 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion.c | 10 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion.h | 2 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion_dummy_driver.c | 6 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion_page_pool.c | 2 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion_priv.h | 4 | ||||
| -rw-r--r-- | drivers/staging/android/ion/tegra/tegra_ion.c | 6 | ||||
| -rw-r--r-- | drivers/staging/android/sync_debug.c | 5 | ||||
| -rw-r--r-- | drivers/staging/android/timed_gpio.c | 8 | ||||
| -rw-r--r-- | drivers/staging/android/uapi/binder.h | 351 |
16 files changed, 28 insertions, 4441 deletions
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig index 7a0e28852965..7e012f37792b 100644 --- a/drivers/staging/android/Kconfig +++ b/drivers/staging/android/Kconfig @@ -1,37 +1,7 @@ menu "Android" -config ANDROID - bool "Android Drivers" - ---help--- - Enable support for various drivers needed on the Android platform - if ANDROID -config ANDROID_BINDER_IPC - bool "Android Binder IPC Driver" - depends on MMU - default n - ---help--- - Binder is used in Android for both communication between processes, - and remote method invocation. - - This means one Android process can call a method/routine in another - Android process, using Binder to identify, invoke and pass arguments - between said processes. - -config ANDROID_BINDER_IPC_32BIT - bool - depends on !64BIT && ANDROID_BINDER_IPC - default y - ---help--- - The Binder API has been changed to support both 32 and 64bit - applications in a mixed environment. - - Enable this to support an old 32-bit Android user-space (v4.4 and - earlier). - - Note that enabling this will break newer Android user-space. - config ASHMEM bool "Enable the Anonymous Shared Memory Subsystem" default n diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile index 517ad5ffa429..479b2b86f8c8 100644 --- a/drivers/staging/android/Makefile +++ b/drivers/staging/android/Makefile @@ -2,7 +2,6 @@ ccflags-y += -I$(src) # needed for trace events obj-y += ion/ -obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o obj-$(CONFIG_ASHMEM) += ashmem.o obj-$(CONFIG_ANDROID_LOGGER) += logger.o obj-$(CONFIG_ANDROID_TIMED_OUTPUT) += timed_output.o diff --git a/drivers/staging/android/TODO b/drivers/staging/android/TODO index b15fb0d6b152..06954cdf3dba 100644 --- a/drivers/staging/android/TODO +++ b/drivers/staging/android/TODO @@ -5,6 +5,13 @@ TODO: - make sure things build as modules properly - add proper arch dependencies as needed - audit userspace interfaces to make sure they are sane + - kuid_t should never be exposed to user space as it is + kernel internal type. Data structure for this kuid_t is: + typedef struct { + uid_t val; + } kuid_t; + - This bug is introduced by Xiong Zhou in the patch bd471258f2e09 + - ("staging: android: logger: use kuid_t instead of uid_t") Please send patches to Greg Kroah-Hartman <greg@kroah.com> and Cc: Brian Swetland <swetland@google.com> diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c index ad4f5790a76f..8c7852742f4b 100644 --- a/drivers/staging/android/ashmem.c +++ b/drivers/staging/android/ashmem.c @@ -418,7 +418,7 @@ out: } /* - * ashmem_shrink - our cache shrinker, called from mm/vmscan.c :: shrink_slab + * ashmem_shrink - our cache shrinker, called from mm/vmscan.c * * 'nr_to_scan' is the number of objects to scan for freeing. * @@ -446,7 +446,7 @@ ashmem_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) loff_t start = range->pgstart * PAGE_SIZE; loff_t end = (range->pgend + 1) * PAGE_SIZE; - do_fallocate(range->asma->file, + vfs_fallocate(range->asma->file, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, start, end - start); range->purged = ASHMEM_WAS_PURGED; @@ -785,7 +785,6 @@ static long ashmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg) .nr_to_scan = LONG_MAX, }; ret = ashmem_shrink_count(&ashmem_shrinker, &sc); - nodes_setall(sc.nodes_to_scan); ashmem_shrink_scan(&ashmem_shrinker, &sc); } break; diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c deleted file mode 100644 index c69c40d69d5c..000000000000 --- a/drivers/staging/android/binder.c +++ /dev/null @@ -1,3673 +0,0 @@ -/* 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. - * - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <asm/cacheflush.h> -#include <linux/fdtable.h> -#include <linux/file.h> -#include <linux/freezer.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/debugfs.h> -#include <linux/rbtree.h> -#include <linux/sched.h> -#include <linux/seq_file.h> -#include <linux/uaccess.h> -#include <linux/vmalloc.h> -#include <linux/slab.h> -#include <linux/pid_namespace.h> - -#include "binder.h" -#include "binder_trace.h" - -static DEFINE_MUTEX(binder_main_lock); -static DEFINE_MUTEX(binder_deferred_lock); -static DEFINE_MUTEX(binder_mmap_lock); - -static HLIST_HEAD(binder_procs); -static HLIST_HEAD(binder_deferred_list); -static HLIST_HEAD(binder_dead_nodes); - -static struct dentry *binder_debugfs_dir_entry_root; -static struct dentry *binder_debugfs_dir_entry_proc; -static struct binder_node *binder_context_mgr_node; -static kuid_t binder_context_mgr_uid = INVALID_UID; -static int binder_last_id; -static struct workqueue_struct *binder_deferred_workqueue; - -#define BINDER_DEBUG_ENTRY(name) \ -static int binder_##name##_open(struct inode *inode, struct file *file) \ -{ \ - return single_open(file, binder_##name##_show, inode->i_private); \ -} \ -\ -static const struct file_operations binder_##name##_fops = { \ - .owner = THIS_MODULE, \ - .open = binder_##name##_open, \ - .read = seq_read, \ - .llseek = seq_lseek, \ - .release = single_release, \ -} - -static int binder_proc_show(struct seq_file *m, void *unused); -BINDER_DEBUG_ENTRY(proc); - -/* 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 bool binder_debug_no_lock; -module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO); - -static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait); -static int binder_stop_on_user_error; - -static int binder_set_stop_on_user_error(const char *val, - struct kernel_param *kp) -{ - int ret; - - ret = param_set_int(val, kp); - if (binder_stop_on_user_error < 2) - wake_up(&binder_user_error_wait); - return ret; -} -module_param_call(stop_on_user_error, binder_set_stop_on_user_error, - param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO); - -#define binder_debug(mask, x...) \ - do { \ - if (binder_debug_mask & mask) \ - pr_info(x); \ - } while (0) - -#define binder_user_error(x...) \ - do { \ - if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \ - pr_info(x); \ - if (binder_stop_on_user_error) \ - binder_stop_on_user_error = 2; \ - } while (0) - -enum binder_stat_types { - BINDER_STAT_PROC, - BINDER_STAT_THREAD, - BINDER_STAT_NODE, - BINDER_STAT_REF, - BINDER_STAT_DEATH, - BINDER_STAT_TRANSACTION, - BINDER_STAT_TRANSACTION_COMPLETE, - BINDER_STAT_COUNT -}; - -struct binder_stats { - int br[_IOC_NR(BR_FAILED_REPLY) + 1]; - int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1]; - int obj_created[BINDER_STAT_COUNT]; - int obj_deleted[BINDER_STAT_COUNT]; -}; - -static struct binder_stats binder_stats; - -static inline void binder_stats_deleted(enum binder_stat_types type) -{ - binder_stats.obj_deleted[type]++; -} - -static inline void binder_stats_created(enum binder_stat_types type) -{ - binder_stats.obj_created[type]++; -} - -struct binder_transaction_log_entry { - int debug_id; - int call_type; - int from_proc; - int from_thread; - int target_handle; - int to_proc; - int to_thread; - int to_node; - int data_size; - int offsets_size; -}; -struct binder_transaction_log { - int next; - int full; - struct binder_transaction_log_entry entry[32]; -}; -static struct binder_transaction_log binder_transaction_log; -static struct binder_transaction_log binder_transaction_log_failed; - -static struct binder_transaction_log_entry *binder_transaction_log_add( - struct binder_transaction_log *log) -{ - struct binder_transaction_log_entry *e; - - e = &log->entry[log->next]; - memset(e, 0, sizeof(*e)); - log->next++; - if (log->next == ARRAY_SIZE(log->entry)) { - log->next = 0; - log->full = 1; - } - return e; -} - -struct binder_work { - struct list_head entry; - enum { - BINDER_WORK_TRANSACTION = 1, - BINDER_WORK_TRANSACTION_COMPLETE, - BINDER_WORK_NODE, - BINDER_WORK_DEAD_BINDER, - BINDER_WORK_DEAD_BINDER_AND_CLEAR, - BINDER_WORK_CLEAR_DEATH_NOTIFICATION, - } type; -}; - -struct binder_node { - int debug_id; - struct binder_work work; - union { - struct rb_node rb_node; - struct hlist_node dead_node; - }; - struct binder_proc *proc; - struct hlist_head refs; - int internal_strong_refs; - int local_weak_refs; - int local_strong_refs; - binder_uintptr_t ptr; - binder_uintptr_t cookie; - unsigned has_strong_ref:1; - unsigned pending_strong_ref:1; - unsigned has_weak_ref:1; - unsigned pending_weak_ref:1; - unsigned has_async_transaction:1; - unsigned accept_fds:1; - unsigned min_priority:8; - struct list_head async_todo; -}; - -struct binder_ref_death { - struct binder_work work; - binder_uintptr_t 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 address */ - struct rb_node rb_node; /* free entry by size or allocated entry */ - /* by address */ - unsigned free:1; - unsigned allow_user_free:1; - unsigned async_transaction:1; - unsigned debug_id:29; - - struct binder_transaction *transaction; - - struct binder_node *target_node; - size_t data_size; - size_t offsets_size; - uint8_t data[0]; -}; - -enum binder_deferred_state { - BINDER_DEFERRED_PUT_FILES = 0x01, - BINDER_DEFERRED_FLUSH = 0x02, - BINDER_DEFERRED_RELEASE = 0x04, -}; - -struct binder_proc { - struct hlist_node proc_node; - struct rb_root threads; - struct rb_root nodes; - struct rb_root refs_by_desc; - struct rb_root refs_by_node; - int pid; - struct vm_area_struct *vma; - struct mm_struct *vma_vm_mm; - struct task_struct *tsk; - struct files_struct *files; - struct hlist_node deferred_work_node; - int deferred_work; - void *buffer; - ptrdiff_t user_buffer_offset; - - struct list_head buffers; - struct rb_root free_buffers; - struct rb_root allocated_buffers; - size_t free_async_space; - - struct page **pages; - size_t buffer_size; - uint32_t buffer_free; - struct list_head todo; - wait_queue_head_t wait; - struct binder_stats stats; - struct list_head delivered_death; - int max_threads; - int requested_threads; - int requested_threads_started; - int ready_threads; - long default_priority; - struct dentry *debugfs_entry; -}; - -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; - kuid_t sender_euid; -}; - -static void -binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer); - -static int task_get_unused_fd_flags(struct binder_proc *proc, int flags) -{ - struct files_struct *files = proc->files; - unsigned long rlim_cur; - unsigned long irqs; - - if (files == NULL) - return -ESRCH; - - if (!lock_task_sighand(proc->tsk, &irqs)) - return -EMFILE; - - rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE); - unlock_task_sighand(proc->tsk, &irqs); - - return __alloc_fd(files, 0, rlim_cur, flags); -} - -/* - * copied from fd_install - */ -static void task_fd_install( - struct binder_proc *proc, unsigned int fd, struct file *file) -{ - if (proc->files) - __fd_install(proc->files, fd, file); -} - -/* - * copied from sys_close - */ -static long task_close_fd(struct binder_proc *proc, unsigned int fd) -{ - int retval; - - if (proc->files == NULL) - return -ESRCH; - - retval = __close_fd(proc->files, fd); - /* can't restart close syscall because file table entry was cleared */ - if (unlikely(retval == -ERESTARTSYS || - retval == -ERESTARTNOINTR || - retval == -ERESTARTNOHAND || - retval == -ERESTART_RESTARTBLOCK)) - retval = -EINTR; - - return retval; -} - -static inline void binder_lock(const char *tag) -{ - trace_binder_lock(tag); - mutex_lock(&binder_main_lock); - trace_binder_locked(tag); -} - -static inline void binder_unlock(const char *tag) -{ - trace_binder_unlock(tag); - mutex_unlock(&binder_main_lock); -} - -static void binder_set_nice(long nice) -{ - long min_nice; - - if (can_nice(current, nice)) { - set_user_nice(current, nice); - return; - } - min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); - binder_debug(BINDER_DEBUG_PRIORITY_CAP, - "%d: nice value %ld not allowed use %ld instead\n", - current->pid, nice, min_nice); - set_user_nice(current, min_nice); - if (min_nice <= MAX_NICE) - return; - binder_user_error("%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; - return (size_t)list_entry(buffer->entry.next, - struct binder_buffer, entry) - (size_t)buffer->data; -} - -static void binder_insert_free_buffer(struct binder_proc *proc, - struct binder_buffer *new_buffer) -{ - struct rb_node **p = &proc->free_buffers.rb_node; - struct rb_node *parent = NULL; - struct binder_buffer *buffer; - size_t buffer_size; - size_t new_buffer_size; - - BUG_ON(!new_buffer->free); - - new_buffer_size = binder_buffer_size(proc, new_buffer); - - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: add free buffer, size %zd, at %p\n", - proc->pid, new_buffer_size, new_buffer); - - while (*p) { - parent = *p; - buffer = rb_entry(parent, struct binder_buffer, rb_node); - BUG_ON(!buffer->free); - - buffer_size = binder_buffer_size(proc, buffer); - - if (new_buffer_size < buffer_size) - p = &parent->rb_left; - else - p = &parent->rb_right; - } - rb_link_node(&new_buffer->rb_node, parent, p); - rb_insert_color(&new_buffer->rb_node, &proc->free_buffers); -} - -static void binder_insert_allocated_buffer(struct binder_proc *proc, - struct binder_buffer *new_buffer) -{ - struct rb_node **p = &proc->allocated_buffers.rb_node; - struct rb_node *parent = NULL; - struct binder_buffer *buffer; - - BUG_ON(new_buffer->free); - - while (*p) { - parent = *p; - buffer = rb_entry(parent, struct binder_buffer, rb_node); - BUG_ON(buffer->free); - - if (new_buffer < buffer) - p = &parent->rb_left; - else if (new_buffer > buffer) - p = &parent->rb_right; - else - BUG(); - } - rb_link_node(&new_buffer->rb_node, parent, p); - rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers); -} - -static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc, - uintptr_t user_ptr) -{ - struct rb_node *n = proc->allocated_buffers.rb_node; - struct binder_buffer *buffer; - struct binder_buffer *kern_ptr; - - kern_ptr = (struct binder_buffer *)(user_ptr - proc->user_buffer_offset - - offsetof(struct binder_buffer, data)); - - while (n) { - buffer = rb_entry(n, struct binder_buffer, rb_node); - BUG_ON(buffer->free); - - if (kern_ptr < buffer) - n = n->rb_left; - else if (kern_ptr > buffer) - n = n->rb_right; - else - return buffer; - } - return NULL; -} - -static int binder_update_page_range(struct binder_proc *proc, int allocate, - void *start, void *end, - struct vm_area_struct *vma) -{ - void *page_addr; - unsigned long user_page_addr; - struct vm_struct tmp_area; - struct page **page; - struct mm_struct *mm; - - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: %s pages %p-%p\n", proc->pid, - allocate ? "allocate" : "free", start, end); - - if (end <= start) - return 0; - - trace_binder_update_page_range(proc, allocate, start, end); - - if (vma) - mm = NULL; - else - mm = get_task_mm(proc->tsk); - - if (mm) { - down_write(&mm->mmap_sem); - vma = proc->vma; - if (vma && mm != proc->vma_vm_mm) { - pr_err("%d: vma mm and task mm mismatch\n", - proc->pid); - vma = NULL; - } - } - - if (allocate == 0) - goto free_range; - - if (vma == NULL) { - pr_err("%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; - - page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; - - BUG_ON(*page); - *page = alloc_page(GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); - if (*page == NULL) { - pr_err("%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? */; - ret = map_vm_area(&tmp_area, PAGE_KERNEL, page); - if (ret) { - pr_err("%d: binder_alloc_buf failed to map page at %p in kernel\n", - proc->pid, page_addr); - goto err_map_kernel_failed; - } - user_page_addr = - (uintptr_t)page_addr + proc->user_buffer_offset; - ret = vm_insert_page(vma, user_page_addr, page[0]); - if (ret) { - pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n", - proc->pid, user_page_addr); - goto err_vm_insert_page_failed; - } - /* vm_insert_page does not seem to increment the refcount */ - } - if (mm) { - up_write(&mm->mmap_sem); - mmput(mm); - } - return 0; - -free_range: - for (page_addr = end - PAGE_SIZE; page_addr >= start; - page_addr -= PAGE_SIZE) { - page = &proc->pages[(page_addr - proc->buffer) / PAGE_SIZE]; - if (vma) - zap_page_range(vma, (uintptr_t)page_addr + - proc->user_buffer_offset, PAGE_SIZE, NULL); -err_vm_insert_page_failed: - unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); -err_map_kernel_failed: - __free_page(*page); - *page = NULL; -err_alloc_page_failed: - ; - } -err_no_vma: - if (mm) { - up_write(&mm->mmap_sem); - mmput(mm); - } - return -ENOMEM; -} - -static struct binder_buffer *binder_alloc_buf(struct binder_proc *proc, - size_t data_size, - size_t offsets_size, int is_async) -{ - struct rb_node *n = proc->free_buffers.rb_node; - struct binder_buffer *buffer; - size_t buffer_size; - struct rb_node *best_fit = NULL; - void *has_page_addr; - void *end_page_addr; - size_t size; - - if (proc->vma == NULL) { - pr_err("%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("%d: got transaction with invalid size %zd-%zd\n", - proc->pid, data_size, offsets_size); - return NULL; - } - - if (is_async && - proc->free_async_space < size + sizeof(struct binder_buffer)) { - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: binder_alloc_buf size %zd failed, no async space left\n", - proc->pid, size); - return NULL; - } - - while (n) { - buffer = rb_entry(n, struct binder_buffer, rb_node); - BUG_ON(!buffer->free); - buffer_size = binder_buffer_size(proc, buffer); - - if (size < buffer_size) { - best_fit = n; - n = n->rb_left; - } else if (size > buffer_size) - n = n->rb_right; - else { - best_fit = n; - break; - } - } - if (best_fit == NULL) { - pr_err("%d: binder_alloc_buf size %zd failed, no address space\n", - proc->pid, size); - return NULL; - } - if (n == NULL) { - buffer = rb_entry(best_fit, struct binder_buffer, rb_node); - buffer_size = binder_buffer_size(proc, buffer); - } - - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: binder_alloc_buf size %zd got buffer %p size %zd\n", - proc->pid, size, buffer, buffer_size); - - has_page_addr = - (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK); - if (n == NULL) { - if (size + sizeof(struct binder_buffer) + 4 >= buffer_size) - buffer_size = size; /* no room for other buffers */ - else - buffer_size = size + sizeof(struct binder_buffer); - } - end_page_addr = - (void *)PAGE_ALIGN((uintptr_t)buffer->data + buffer_size); - if (end_page_addr > has_page_addr) - end_page_addr = has_page_addr; - if (binder_update_page_range(proc, 1, - (void *)PAGE_ALIGN((uintptr_t)buffer->data), end_page_addr, NULL)) - return NULL; - - rb_erase(best_fit, &proc->free_buffers); - buffer->free = 0; - binder_insert_allocated_buffer(proc, buffer); - if (buffer_size != size) { - struct binder_buffer *new_buffer = (void *)buffer->data + size; - - list_add(&new_buffer->entry, &buffer->entry); - new_buffer->free = 1; - binder_insert_free_buffer(proc, new_buffer); - } - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: binder_alloc_buf size %zd got %p\n", - proc->pid, size, buffer); - buffer->data_size = data_size; - buffer->offsets_size = offsets_size; - buffer->async_transaction = is_async; - if (is_async) { - proc->free_async_space -= size + sizeof(struct binder_buffer); - binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, - "%d: binder_alloc_buf size %zd async free %zd\n", - proc->pid, size, proc->free_async_space); - } - - return buffer; -} - -static void *buffer_start_page(struct binder_buffer *buffer) -{ - return (void *)((uintptr_t)buffer & PAGE_MASK); -} - -static void *buffer_end_page(struct binder_buffer *buffer) -{ - return (void *)(((uintptr_t)(buffer + 1) - 1) & PAGE_MASK); -} - -static void binder_delete_free_buffer(struct binder_proc *proc, - struct binder_buffer *buffer) -{ - struct binder_buffer *prev, *next = NULL; - int free_page_end = 1; - int free_page_start = 1; - - BUG_ON(proc->buffers.next == &buffer->entry); - prev = list_entry(buffer->entry.prev, struct binder_buffer, entry); - BUG_ON(!prev->free); - if (buffer_end_page(prev) == buffer_start_page(buffer)) { - free_page_start = 0; - if (buffer_end_page(prev) == buffer_end_page(buffer)) - free_page_end = 0; - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: merge free, buffer %p share page with %p\n", - proc->pid, buffer, prev); - } - - if (!list_is_last(&buffer->entry, &proc->buffers)) { - next = list_entry(buffer->entry.next, - struct binder_buffer, entry); - if (buffer_start_page(next) == buffer_end_page(buffer)) { - free_page_end = 0; - if (buffer_start_page(next) == - buffer_start_page(buffer)) - free_page_start = 0; - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: merge free, buffer %p share page with %p\n", - proc->pid, buffer, prev); - } - } - list_del(&buffer->entry); - if (free_page_start || free_page_end) { - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: merge free, buffer %p do not share page%s%s with %p or %p\n", - proc->pid, buffer, free_page_start ? "" : " end", - free_page_end ? "" : " start", prev, next); - binder_update_page_range(proc, 0, free_page_start ? - buffer_start_page(buffer) : buffer_end_page(buffer), - (free_page_end ? buffer_end_page(buffer) : - buffer_start_page(buffer)) + PAGE_SIZE, NULL); - } -} - -static void binder_free_buf(struct binder_proc *proc, - struct binder_buffer *buffer) -{ - size_t size, buffer_size; - - buffer_size = binder_buffer_size(proc, buffer); - - size = ALIGN(buffer->data_size, sizeof(void *)) + - ALIGN(buffer->offsets_size, sizeof(void *)); - - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%d: binder_free_buf %p size %zd buffer_size %zd\n", - proc->pid, buffer, size, buffer_size); - - BUG_ON(buffer->free); - BUG_ON(size > buffer_size); - BUG_ON(buffer->transaction != NULL); - BUG_ON((void *)buffer < proc->buffer); - BUG_ON((void *)buffer > proc->buffer + proc->buffer_size); - - if (buffer->async_transaction) { - proc->free_async_space += size + sizeof(struct binder_buffer); - - binder_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC, - "%d: binder_free_buf size %zd async free %zd\n", - proc->pid, size, proc->free_async_space); - } - - binder_update_page_range(proc, 0, - (void *)PAGE_ALIGN((uintptr_t)buffer->data), - (void *)(((uintptr_t)buffer->data + buffer_size) & PAGE_MASK), - NULL); - rb_erase(&buffer->rb_node, &proc->allocated_buffers); - buffer->free = 1; - if (!list_is_last(&buffer->entry, &proc->buffers)) { - struct binder_buffer *next = list_entry(buffer->entry.next, - struct binder_buffer, entry); - - if (next->free) { - rb_erase(&next->rb_node, &proc->free_buffers); - binder_delete_free_buffer(proc, next); - } - } - if (proc->buffers.next != &buffer->entry) { - struct binder_buffer *prev = list_entry(buffer->entry.prev, - struct binder_buffer, entry); - - if (prev->free) { - binder_delete_free_buffer(proc, buffer); - rb_erase(&prev->rb_node, &proc->free_buffers); - buffer = prev; - } - } - binder_insert_free_buffer(proc, buffer); -} - -static struct binder_node *binder_get_node(struct binder_proc *proc, - binder_uintptr_t 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, - binder_uintptr_t ptr, - binder_uintptr_t cookie) -{ - struct rb_node **p = &proc->nodes.rb_node; - struct rb_node *parent = NULL; - struct binder_node *node; - - while (*p) { - parent = *p; - node = rb_entry(parent, struct binder_node, rb_node); - - if (ptr < node->ptr) - p = &(*p)->rb_left; - else if (ptr > node->ptr) - p = &(*p)->rb_right; - else - return NULL; - } - - node = kzalloc(sizeof(*node), GFP_KERNEL); - if (node == NULL) - return NULL; - binder_stats_created(BINDER_STAT_NODE); - rb_link_node(&node->rb_node, parent, p); - rb_insert_color(&node->rb_node, &proc->nodes); - node->debug_id = ++binder_last_id; - node->proc = proc; - node->ptr = ptr; - node->cookie = cookie; - node->work.type = BINDER_WORK_NODE; - INIT_LIST_HEAD(&node->work.entry); - INIT_LIST_HEAD(&node->async_todo); - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d:%d node %d u%016llx c%016llx created\n", - proc->pid, current->pid, node->debug_id, - (u64)node->ptr, (u64)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)) { - pr_err("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) { - pr_err("invalid inc weak node for %d\n", - node->debug_id); - return -EINVAL; - } - list_add_tail(&node->work.entry, target_list); - } - } - return 0; -} - -static int binder_dec_node(struct binder_node *node, int strong, int internal) -{ - if (strong) { - if (internal) - node->internal_strong_refs--; - else - node->local_strong_refs--; - if (node->local_strong_refs || node->internal_strong_refs) - return 0; - } else { - if (!internal) - node->local_weak_refs--; - if (node->local_weak_refs || !hlist_empty(&node->refs)) - return 0; - } - if (node->proc && (node->has_strong_ref || node->has_weak_ref)) { - if (list_empty(&node->work.entry)) { - list_add_tail(&node->work.entry, &node->proc->todo); - wake_up_interruptible(&node->proc->wait); - } - } else { - if (hlist_empty(&node->refs) && !node->local_strong_refs && - !node->local_weak_refs) { - list_del_init(&node->work.entry); - if (node->proc) { - rb_erase(&node->rb_node, &node->proc->nodes); - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "refless node %d deleted\n", - node->debug_id); - } else { - hlist_del(&node->dead_node); - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "dead node %d deleted\n", - node->debug_id); - } - kfree(node); - binder_stats_deleted(BINDER_STAT_NODE); - } - } - - return 0; -} - - -static struct binder_ref *binder_get_ref(struct binder_proc *proc, - uint32_t desc) -{ - struct rb_node *n = proc->refs_by_desc.rb_node; - struct binder_ref *ref; - - while (n) { - ref = rb_entry(n, struct binder_ref, rb_node_desc); - - if (desc < ref->desc) - n = n->rb_left; - else if (desc > ref->desc) - n = n->rb_right; - else - return ref; - } - return NULL; -} - -static struct binder_ref *binder_get_ref_for_node(struct binder_proc *proc, - struct binder_node *node) -{ - struct rb_node *n; - struct rb_node **p = &proc->refs_by_node.rb_node; - struct rb_node *parent = NULL; - struct binder_ref *ref, *new_ref; - - while (*p) { - parent = *p; - ref = rb_entry(parent, struct binder_ref, rb_node_node); - - if (node < ref->node) - p = &(*p)->rb_left; - else if (node > ref->node) - p = &(*p)->rb_right; - else - return ref; - } - new_ref = kzalloc(sizeof(*ref), GFP_KERNEL); - if (new_ref == NULL) - return NULL; - binder_stats_created(BINDER_STAT_REF); - new_ref->debug_id = ++binder_last_id; - new_ref->proc = proc; - new_ref->node = node; - rb_link_node(&new_ref->rb_node_node, parent, p); - rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node); - - new_ref->desc = (node == binder_context_mgr_node) ? 0 : 1; - for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) { - ref = rb_entry(n, struct binder_ref, rb_node_desc); - if (ref->desc > new_ref->desc) - break; - new_ref->desc = ref->desc + 1; - } - - p = &proc->refs_by_desc.rb_node; - while (*p) { - parent = *p; - ref = rb_entry(parent, struct binder_ref, rb_node_desc); - - if (new_ref->desc < ref->desc) - p = &(*p)->rb_left; - else if (new_ref->desc > ref->desc) - p = &(*p)->rb_right; - else - BUG(); - } - rb_link_node(&new_ref->rb_node_desc, parent, p); - rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc); - if (node) { - hlist_add_head(&new_ref->node_entry, &node->refs); - - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d new ref %d desc %d for node %d\n", - proc->pid, new_ref->debug_id, new_ref->desc, - node->debug_id); - } else { - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d new ref %d desc %d for dead node\n", - proc->pid, new_ref->debug_id, new_ref->desc); - } - return new_ref; -} - -static void binder_delete_ref(struct binder_ref *ref) -{ - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d delete ref %d desc %d for node %d\n", - ref->proc->pid, ref->debug_id, ref->desc, - ref->node->debug_id); - - rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc); - rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node); - if (ref->strong) - binder_dec_node(ref->node, 1, 1); - hlist_del(&ref->node_entry); - binder_dec_node(ref->node, 0, 1); - if (ref->death) { - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "%d delete ref %d desc %d has death notification\n", - ref->proc->pid, ref->debug_id, ref->desc); - list_del(&ref->death->work.entry); - kfree(ref->death); - binder_stats_deleted(BINDER_STAT_DEATH); - } - kfree(ref); - binder_stats_deleted(BINDER_STAT_REF); -} - -static int binder_inc_ref(struct binder_ref *ref, int strong, - struct list_head *target_list) -{ - int ret; - - if (strong) { - if (ref->strong == 0) { - ret = binder_inc_node(ref->node, 1, 1, target_list); - if (ret) - return ret; - } - ref->strong++; - } else { - if (ref->weak == 0) { - ret = binder_inc_node(ref->node, 0, 1, target_list); - if (ret) - return ret; - } - ref->weak++; - } - return 0; -} - - -static int binder_dec_ref(struct binder_ref *ref, int strong) -{ - if (strong) { - if (ref->strong == 0) { - binder_user_error("%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("%d invalid dec weak, ref %d desc %d s %d w %d\n", - ref->proc->pid, ref->debug_id, - ref->desc, ref->strong, ref->weak); - return -EINVAL; - } - ref->weak--; - } - if (ref->strong == 0 && ref->weak == 0) - binder_delete_ref(ref); - return 0; -} - -static void binder_pop_transaction(struct binder_thread *target_thread, - struct binder_transaction *t) -{ - if (target_thread) { - BUG_ON(target_thread->transaction_stack != t); - BUG_ON(target_thread->transaction_stack->from != target_thread); - target_thread->transaction_stack = - target_thread->transaction_stack->from_parent; - t->from = NULL; - } - t->need_reply = 0; - if (t->buffer) - t->buffer->transaction = NULL; - kfree(t); - binder_stats_deleted(BINDER_STAT_TRANSACTION); -} - -static void binder_send_failed_reply(struct binder_transaction *t, - uint32_t error_code) -{ - struct binder_thread *target_thread; - struct binder_transaction *next; - - BUG_ON(t->flags & TF_ONE_WAY); - while (1) { - target_thread = t->from; - if (target_thread) { - if (target_thread->return_error != BR_OK && - target_thread->return_error2 == BR_OK) { - target_thread->return_error2 = - target_thread->return_error; - target_thread->return_error = BR_OK; - } - if (target_thread->return_error == BR_OK) { - binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, - "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 { - pr_err("reply failed, target thread, %d:%d, has error code %d already\n", - target_thread->proc->pid, - target_thread->pid, - target_thread->return_error); - } - return; - } - next = t->from_parent; - - binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, - "send failed reply for transaction %d, target dead\n", - t->debug_id); - - binder_pop_transaction(target_thread, t); - if (next == NULL) { - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "reply failed, no target thread at root\n"); - return; - } - t = next; - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "reply failed, no target thread -- retry %d\n", - t->debug_id); - } -} - -static void binder_transaction_buffer_release(struct binder_proc *proc, - struct binder_buffer *buffer, - binder_size_t *failed_at) -{ - binder_size_t *offp, *off_end; - int debug_id = buffer->debug_id; - - binder_debug(BINDER_DEBUG_TRANSACTION, - "%d buffer release %d, size %zd-%zd, failed at %p\n", - proc->pid, buffer->debug_id, - buffer->data_size, buffer->offsets_size, failed_at); - - if (buffer->target_node) - binder_dec_node(buffer->target_node, 1, 0); - - offp = (binder_size_t *)(buffer->data + - ALIGN(buffer->data_size, sizeof(void *))); - if (failed_at) - off_end = failed_at; - else - off_end = (void *)offp + buffer->offsets_size; - for (; offp < off_end; offp++) { - struct flat_binder_object *fp; - - if (*offp > buffer->data_size - sizeof(*fp) || - buffer->data_size < sizeof(*fp) || - !IS_ALIGNED(*offp, sizeof(u32))) { - pr_err("transaction release %d bad offset %lld, size %zd\n", - debug_id, (u64)*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) { - pr_err("transaction release %d bad node %016llx\n", - debug_id, (u64)fp->binder); - break; - } - binder_debug(BINDER_DEBUG_TRANSACTION, - " node %d u%016llx\n", - node->debug_id, (u64)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) { - pr_err("transaction release %d bad handle %d\n", - debug_id, fp->handle); - break; - } - binder_debug(BINDER_DEBUG_TRANSACTION, - " ref %d desc %d (node %d)\n", - ref->debug_id, ref->desc, ref->node->debug_id); - binder_dec_ref(ref, fp->type == BINDER_TYPE_HANDLE); - } break; - - case BINDER_TYPE_FD: - binder_debug(BINDER_DEBUG_TRANSACTION, - " fd %d\n", fp->handle); - if (failed_at) - task_close_fd(proc, fp->handle); - break; - - default: - pr_err("transaction release %d bad object type %x\n", - debug_id, fp->type); - break; - } - } -} - -static void binder_transaction(struct binder_proc *proc, - struct binder_thread *thread, - struct binder_transaction_data *tr, int reply) -{ - struct binder_transaction *t; - struct binder_work *tcomplete; - binder_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("%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("%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("%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("%d:%d got transaction to invalid handle\n", - proc->pid, thread->pid); - return_error = BR_FAILED_REPLY; - goto err_invalid_target_handle; - } - target_node = ref->node; - } else { - target_node = binder_context_mgr_node; - if (target_node == NULL) { - return_error = BR_DEAD_REPLY; - goto err_no_context_mgr_node; - } - } - e->to_node = target_node->debug_id; - target_proc = target_node->proc; - if (target_proc == NULL) { - return_error = BR_DEAD_REPLY; - goto err_dead_binder; - } - if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { - struct binder_transaction *tmp; - - tmp = thread->transaction_stack; - if (tmp->to_thread != thread) { - binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n", - proc->pid, thread->pid, tmp->debug_id, - tmp->to_proc ? tmp->to_proc->pid : 0, - tmp->to_thread ? - tmp->to_thread->pid : 0); - return_error = BR_FAILED_REPLY; - goto err_bad_call_stack; - } - while (tmp) { - if (tmp->from && tmp->from->proc == target_proc) - target_thread = tmp->from; - tmp = tmp->from_parent; - } - } - } - if (target_thread) { - e->to_thread = target_thread->pid; - target_list = &target_thread->todo; - target_wait = &target_thread->wait; - } else { - target_list = &target_proc->todo; - target_wait = &target_proc->wait; - } - e->to_proc = target_proc->pid; - - /* TODO: reuse incoming transaction for reply */ - t = kzalloc(sizeof(*t), GFP_KERNEL); - if (t == NULL) { - return_error = BR_FAILED_REPLY; - goto err_alloc_t_failed; - } - binder_stats_created(BINDER_STAT_TRANSACTION); - - tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); - if (tcomplete == NULL) { - return_error = BR_FAILED_REPLY; - goto err_alloc_tcomplete_failed; - } - binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); - - t->debug_id = ++binder_last_id; - e->debug_id = t->debug_id; - - if (reply) - binder_debug(BINDER_DEBUG_TRANSACTION, - "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld\n", - proc->pid, thread->pid, t->debug_id, - target_proc->pid, target_thread->pid, - (u64)tr->data.ptr.buffer, - (u64)tr->data.ptr.offsets, - (u64)tr->data_size, (u64)tr->offsets_size); - else - binder_debug(BINDER_DEBUG_TRANSACTION, - "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld\n", - proc->pid, thread->pid, t->debug_id, - target_proc->pid, target_node->debug_id, - (u64)tr->data.ptr.buffer, - (u64)tr->data.ptr.offsets, - (u64)tr->data_size, (u64)tr->offsets_size); - - if (!reply && !(tr->flags & TF_ONE_WAY)) - t->from = thread; - else - t->from = NULL; - t->sender_euid = task_euid(proc->tsk); - t->to_proc = target_proc; - t->to_thread = target_thread; - t->code = tr->code; - t->flags = tr->flags; - t->priority = task_nice(current); - - trace_binder_transaction(reply, t, target_node); - - 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; - trace_binder_transaction_alloc_buf(t->buffer); - if (target_node) - binder_inc_node(target_node, 1, 0, NULL); - - offp = (binder_size_t *)(t->buffer->data + - ALIGN(tr->data_size, sizeof(void *))); - - if (copy_from_user(t->buffer->data, (const void __user *)(uintptr_t) - tr->data.ptr.buffer, tr->data_size)) { - binder_user_error("%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, (const void __user *)(uintptr_t) - tr->data.ptr.offsets, tr->offsets_size)) { - binder_user_error("%d:%d got transaction with invalid offsets ptr\n", - proc->pid, thread->pid); - return_error = BR_FAILED_REPLY; - goto err_copy_data_failed; - } - if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) { - binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n", - proc->pid, thread->pid, (u64)tr->offsets_size); - return_error = BR_FAILED_REPLY; - goto err_bad_offset; - } - off_end = (void *)offp + tr->offsets_size; - for (; offp < off_end; offp++) { - struct flat_binder_object *fp; - - if (*offp > t->buffer->data_size - sizeof(*fp) || - t->buffer->data_size < sizeof(*fp) || - !IS_ALIGNED(*offp, sizeof(u32))) { - binder_user_error("%d:%d got transaction with invalid offset, %lld\n", - proc->pid, thread->pid, (u64)*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("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n", - proc->pid, thread->pid, - (u64)fp->binder, node->debug_id, - (u64)fp->cookie, (u64)node->cookie); - return_error = BR_FAILED_REPLY; - 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); - - trace_binder_transaction_node_to_ref(t, node, ref); - binder_debug(BINDER_DEBUG_TRANSACTION, - " node %d u%016llx -> ref %d desc %d\n", - node->debug_id, (u64)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("%d:%d got transaction with invalid handle, %d\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); - trace_binder_transaction_ref_to_node(t, ref); - binder_debug(BINDER_DEBUG_TRANSACTION, - " ref %d desc %d -> node %d u%016llx\n", - ref->debug_id, ref->desc, ref->node->debug_id, - (u64)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); - trace_binder_transaction_ref_to_ref(t, ref, - new_ref); - binder_debug(BINDER_DEBUG_TRANSACTION, - " ref %d desc %d -> ref %d desc %d (node %d)\n", - ref->debug_id, ref->desc, new_ref->debug_id, - new_ref->desc, ref->node->debug_id); - } - } break; - - case BINDER_TYPE_FD: { - int target_fd; - struct file *file; - - if (reply) { - if (!(in_reply_to->flags & TF_ACCEPT_FDS)) { - binder_user_error("%d:%d got reply with fd, %d, 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("%d:%d got transaction with fd, %d, 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("%d:%d got transaction with invalid fd, %d\n", - proc->pid, thread->pid, fp->handle); - return_error = BR_FAILED_REPLY; - goto err_fget_failed; - } - target_fd = task_get_unused_fd_flags(target_proc, O_CLOEXEC); - if (target_fd < 0) { - fput(file); - return_error = BR_FAILED_REPLY; - goto err_get_unused_fd_failed; - } - task_fd_install(target_proc, target_fd, file); - trace_binder_transaction_fd(t, fp->handle, target_fd); - binder_debug(BINDER_DEBUG_TRANSACTION, - " fd %d -> %d\n", fp->handle, target_fd); - /* TODO: fput? */ - fp->handle = target_fd; - } break; - - default: - binder_user_error("%d:%d got transaction with invalid object type, %x\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: - trace_binder_transaction_failed_buffer_release(t->buffer); - binder_transaction_buffer_release(target_proc, t->buffer, offp); - t->buffer->transaction = NULL; - binder_free_buf(target_proc, t->buffer); -err_binder_alloc_buf_failed: - kfree(tcomplete); - binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); -err_alloc_tcomplete_failed: - kfree(t); - binder_stats_deleted(BINDER_STAT_TRANSACTION); -err_alloc_t_failed: -err_bad_call_stack: -err_empty_call_stack: -err_dead_binder: -err_invalid_target_handle: -err_no_context_mgr_node: - binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, - "%d:%d transaction failed %d, size %lld-%lld\n", - proc->pid, thread->pid, return_error, - (u64)tr->data_size, (u64)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 int binder_thread_write(struct binder_proc *proc, - struct binder_thread *thread, - binder_uintptr_t binder_buffer, size_t size, - binder_size_t *consumed) -{ - uint32_t cmd; - void __user *buffer = (void __user *)(uintptr_t)binder_buffer; - 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); - trace_binder_command(cmd); - 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("%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("%d:%d refcount change on invalid ref %d\n", - proc->pid, thread->pid, target); - break; - } - switch (cmd) { - case BC_INCREFS: - debug_string = "IncRefs"; - binder_inc_ref(ref, 0, NULL); - break; - case BC_ACQUIRE: - debug_string = "Acquire"; - binder_inc_ref(ref, 1, NULL); - break; - case BC_RELEASE: - debug_string = "Release"; - binder_dec_ref(ref, 1); - break; - case BC_DECREFS: - default: - debug_string = "DecRefs"; - binder_dec_ref(ref, 0); - break; - } - binder_debug(BINDER_DEBUG_USER_REFS, - "%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: { - binder_uintptr_t node_ptr; - binder_uintptr_t cookie; - struct binder_node *node; - - if (get_user(node_ptr, (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - if (get_user(cookie, (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - node = binder_get_node(proc, node_ptr); - if (node == NULL) { - binder_user_error("%d:%d %s u%016llx no match\n", - proc->pid, thread->pid, - cmd == BC_INCREFS_DONE ? - "BC_INCREFS_DONE" : - "BC_ACQUIRE_DONE", - (u64)node_ptr); - break; - } - if (cookie != node->cookie) { - binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n", - proc->pid, thread->pid, - cmd == BC_INCREFS_DONE ? - "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE", - (u64)node_ptr, node->debug_id, - (u64)cookie, (u64)node->cookie); - break; - } - if (cmd == BC_ACQUIRE_DONE) { - if (node->pending_strong_ref == 0) { - binder_user_error("%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("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n", - proc->pid, thread->pid, - node->debug_id); - break; - } - node->pending_weak_ref = 0; - } - binder_dec_node(node, cmd == BC_ACQUIRE_DONE, 0); - binder_debug(BINDER_DEBUG_USER_REFS, - "%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: - pr_err("BC_ATTEMPT_ACQUIRE not supported\n"); - return -EINVAL; - case BC_ACQUIRE_RESULT: - pr_err("BC_ACQUIRE_RESULT not supported\n"); - return -EINVAL; - - case BC_FREE_BUFFER: { - binder_uintptr_t data_ptr; - struct binder_buffer *buffer; - - if (get_user(data_ptr, (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - - buffer = binder_buffer_lookup(proc, data_ptr); - if (buffer == NULL) { - binder_user_error("%d:%d BC_FREE_BUFFER u%016llx no match\n", - proc->pid, thread->pid, (u64)data_ptr); - break; - } - if (!buffer->allow_user_free) { - binder_user_error("%d:%d BC_FREE_BUFFER u%016llx matched unreturned buffer\n", - proc->pid, thread->pid, (u64)data_ptr); - break; - } - binder_debug(BINDER_DEBUG_FREE_BUFFER, - "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n", - proc->pid, thread->pid, (u64)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); - } - trace_binder_transaction_buffer_release(buffer); - binder_transaction_buffer_release(proc, buffer, NULL); - binder_free_buf(proc, buffer); - break; - } - - case BC_TRANSACTION: - case BC_REPLY: { - struct binder_transaction_data tr; - - if (copy_from_user(&tr, ptr, sizeof(tr))) - return -EFAULT; - ptr += sizeof(tr); - binder_transaction(proc, thread, &tr, cmd == BC_REPLY); - break; - } - - case BC_REGISTER_LOOPER: - binder_debug(BINDER_DEBUG_THREADS, - "%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("%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("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n", - proc->pid, thread->pid); - } else { - proc->requested_threads--; - proc->requested_threads_started++; - } - thread->looper |= BINDER_LOOPER_STATE_REGISTERED; - break; - case BC_ENTER_LOOPER: - binder_debug(BINDER_DEBUG_THREADS, - "%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("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n", - proc->pid, thread->pid); - } - thread->looper |= BINDER_LOOPER_STATE_ENTERED; - break; - case BC_EXIT_LOOPER: - binder_debug(BINDER_DEBUG_THREADS, - "%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; - binder_uintptr_t 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, (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - ref = binder_get_ref(proc, target); - if (ref == NULL) { - binder_user_error("%d:%d %s invalid ref %d\n", - proc->pid, thread->pid, - cmd == BC_REQUEST_DEATH_NOTIFICATION ? - "BC_REQUEST_DEATH_NOTIFICATION" : - "BC_CLEAR_DEATH_NOTIFICATION", - target); - break; - } - - binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, - "%d:%d %s %016llx 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", - (u64)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("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n", - proc->pid, thread->pid); - break; - } - death = kzalloc(sizeof(*death), GFP_KERNEL); - if (death == NULL) { - thread->return_error = BR_ERROR; - binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, - "%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n", - proc->pid, thread->pid); - break; - } - binder_stats_created(BINDER_STAT_DEATH); - INIT_LIST_HEAD(&death->work.entry); - death->cookie = cookie; - ref->death = death; - if (ref->node->proc == NULL) { - ref->death->work.type = BINDER_WORK_DEAD_BINDER; - if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) { - list_add_tail(&ref->death->work.entry, &thread->todo); - } else { - list_add_tail(&ref->death->work.entry, &proc->todo); - wake_up_interruptible(&proc->wait); - } - } - } else { - if (ref->death == NULL) { - binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n", - proc->pid, thread->pid); - break; - } - death = ref->death; - if (death->cookie != cookie) { - binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n", - proc->pid, thread->pid, - (u64)death->cookie, - (u64)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; - binder_uintptr_t cookie; - struct binder_ref_death *death = NULL; - - if (get_user(cookie, (binder_uintptr_t __user *)ptr)) - return -EFAULT; - - ptr += sizeof(void *); - list_for_each_entry(w, &proc->delivered_death, entry) { - struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work); - - if (tmp_death->cookie == cookie) { - death = tmp_death; - break; - } - } - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "%d:%d BC_DEAD_BINDER_DONE %016llx found %p\n", - proc->pid, thread->pid, (u64)cookie, - death); - if (death == NULL) { - binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n", - proc->pid, thread->pid, (u64)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: - pr_err("%d:%d unknown command %d\n", - proc->pid, thread->pid, cmd); - return -EINVAL; - } - *consumed = ptr - buffer; - } - return 0; -} - -static void binder_stat_br(struct binder_proc *proc, - struct binder_thread *thread, uint32_t cmd) -{ - trace_binder_return(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, - binder_uintptr_t binder_buffer, size_t size, - binder_size_t *consumed, int non_block) -{ - void __user *buffer = (void __user *)(uintptr_t)binder_buffer; - 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); - binder_stat_br(proc, thread, thread->return_error2); - 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); - binder_stat_br(proc, thread, thread->return_error); - thread->return_error = BR_OK; - goto done; - } - - - thread->looper |= BINDER_LOOPER_STATE_WAITING; - if (wait_for_proc_work) - proc->ready_threads++; - - binder_unlock(__func__); - - trace_binder_wait_for_work(wait_for_proc_work, - !!thread->transaction_stack, - !list_empty(&thread->todo)); - if (wait_for_proc_work) { - if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED | - BINDER_LOOPER_STATE_ENTERED))) { - binder_user_error("%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_freezable_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_freezable(thread->wait, binder_has_thread_work(thread)); - } - - binder_lock(__func__); - - 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 { - /* no data added */ - if (ptr - buffer == 4 && - !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) - goto retry; - break; - } - - if (end - ptr < sizeof(tr) + 4) - break; - - switch (w->type) { - case BINDER_WORK_TRANSACTION: { - t = container_of(w, struct binder_transaction, work); - } break; - case BINDER_WORK_TRANSACTION_COMPLETE: { - cmd = BR_TRANSACTION_COMPLETE; - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - - binder_stat_br(proc, thread, cmd); - binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE, - "%d:%d BR_TRANSACTION_COMPLETE\n", - proc->pid, thread->pid); - - list_del(&w->entry); - kfree(w); - binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); - } break; - case BINDER_WORK_NODE: { - struct binder_node *node = container_of(w, struct binder_node, work); - uint32_t cmd = BR_NOOP; - const char *cmd_name; - int strong = node->internal_strong_refs || node->local_strong_refs; - int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong; - - if (weak && !node->has_weak_ref) { - cmd = BR_INCREFS; - cmd_name = "BR_INCREFS"; - node->has_weak_ref = 1; - node->pending_weak_ref = 1; - node->local_weak_refs++; - } else if (strong && !node->has_strong_ref) { - cmd = BR_ACQUIRE; - cmd_name = "BR_ACQUIRE"; - node->has_strong_ref = 1; - node->pending_strong_ref = 1; - node->local_strong_refs++; - } else if (!strong && node->has_strong_ref) { - cmd = BR_RELEASE; - cmd_name = "BR_RELEASE"; - node->has_strong_ref = 0; - } else if (!weak && node->has_weak_ref) { - cmd = BR_DECREFS; - cmd_name = "BR_DECREFS"; - node->has_weak_ref = 0; - } - if (cmd != BR_NOOP) { - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (put_user(node->ptr, - (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - if (put_user(node->cookie, - (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - - binder_stat_br(proc, thread, cmd); - binder_debug(BINDER_DEBUG_USER_REFS, - "%d:%d %s %d u%016llx c%016llx\n", - proc->pid, thread->pid, cmd_name, - node->debug_id, - (u64)node->ptr, (u64)node->cookie); - } else { - list_del_init(&w->entry); - if (!weak && !strong) { - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d:%d node %d u%016llx c%016llx deleted\n", - proc->pid, thread->pid, - node->debug_id, - (u64)node->ptr, - (u64)node->cookie); - rb_erase(&node->rb_node, &proc->nodes); - kfree(node); - binder_stats_deleted(BINDER_STAT_NODE); - } else { - binder_debug(BINDER_DEBUG_INTERNAL_REFS, - "%d:%d node %d u%016llx c%016llx state unchanged\n", - proc->pid, thread->pid, - node->debug_id, - (u64)node->ptr, - (u64)node->cookie); - } - } - } break; - case BINDER_WORK_DEAD_BINDER: - case BINDER_WORK_DEAD_BINDER_AND_CLEAR: - case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { - struct binder_ref_death *death; - uint32_t cmd; - - death = container_of(w, struct binder_ref_death, work); - if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) - cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE; - else - cmd = BR_DEAD_BINDER; - if (put_user(cmd, (uint32_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(uint32_t); - if (put_user(death->cookie, - (binder_uintptr_t __user *)ptr)) - return -EFAULT; - ptr += sizeof(binder_uintptr_t); - binder_stat_br(proc, thread, cmd); - binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION, - "%d:%d %s %016llx\n", - proc->pid, thread->pid, - cmd == BR_DEAD_BINDER ? - "BR_DEAD_BINDER" : - "BR_CLEAR_DEATH_NOTIFICATION_DONE", - (u64)death->cookie); - - if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) { - list_del(&w->entry); - kfree(death); - binder_stats_deleted(BINDER_STAT_DEATH); - } else - list_move(&w->entry, &proc->delivered_death); - if (cmd == BR_DEAD_BINDER) - goto done; /* DEAD_BINDER notifications can cause transactions */ - } break; - } - - if (!t) - continue; - - BUG_ON(t->buffer == NULL); - if (t->buffer->target_node) { - struct binder_node *target_node = t->buffer->target_node; - - tr.target.ptr = target_node->ptr; - tr.cookie = target_node->cookie; - t->saved_priority = task_nice(current); - if (t->priority < target_node->min_priority && - !(t->flags & TF_ONE_WAY)) - binder_set_nice(t->priority); - else if (!(t->flags & TF_ONE_WAY) || - t->saved_priority > target_node->min_priority) - binder_set_nice(target_node->min_priority); - cmd = BR_TRANSACTION; - } else { - tr.target.ptr = 0; - tr.cookie = 0; - cmd = BR_REPLY; - } - tr.code = t->code; - tr.flags = t->flags; - tr.sender_euid = from_kuid(current_user_ns(), t->sender_euid); - - if (t->from) { - struct task_struct *sender = t->from->proc->tsk; - - tr.sender_pid = task_tgid_nr_ns(sender, - task_active_pid_ns(current)); - } else { - tr.sender_pid = 0; - } - - tr.data_size = t->buffer->data_size; - tr.offsets_size = t->buffer->offsets_size; - tr.data.ptr.buffer = (binder_uintptr_t)( - (uintptr_t)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); - - trace_binder_transaction_received(t); - binder_stat_br(proc, thread, cmd); - binder_debug(BINDER_DEBUG_TRANSACTION, - "%d:%d %s %d %d:%d, cmd %d size %zd-%zd ptr %016llx-%016llx\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, - (u64)tr.data.ptr.buffer, (u64)tr.data.ptr.offsets); - - list_del(&t->work.entry); - t->buffer->allow_user_free = 1; - if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) { - t->to_parent = thread->transaction_stack; - t->to_thread = thread; - thread->transaction_stack = t; - } else { - t->buffer->transaction = NULL; - kfree(t); - binder_stats_deleted(BINDER_STAT_TRANSACTION); - } - break; - } - -done: - - *consumed = ptr - buffer; - if (proc->requested_threads + proc->ready_threads == 0 && - proc->requested_threads_started < proc->max_threads && - (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | - BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */ - /*spawn a new thread if we leave this out */) { - proc->requested_threads++; - binder_debug(BINDER_DEBUG_THREADS, - "%d:%d BR_SPAWN_LOOPER\n", - proc->pid, thread->pid); - if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer)) - return -EFAULT; - binder_stat_br(proc, thread, BR_SPAWN_LOOPER); - } - return 0; -} - -static void binder_release_work(struct list_head *list) -{ - struct binder_work *w; - - while (!list_empty(list)) { - w = list_first_entry(list, struct binder_work, entry); - list_del_init(&w->entry); - switch (w->type) { - case BINDER_WORK_TRANSACTION: { - struct binder_transaction *t; - - t = container_of(w, struct binder_transaction, work); - if (t->buffer->target_node && - !(t->flags & TF_ONE_WAY)) { - binder_send_failed_reply(t, BR_DEAD_REPLY); - } else { - binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, - "undelivered transaction %d\n", - t->debug_id); - t->buffer->transaction = NULL; - kfree(t); - binder_stats_deleted(BINDER_STAT_TRANSACTION); - } - } break; - case BINDER_WORK_TRANSACTION_COMPLETE: { - binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, - "undelivered TRANSACTION_COMPLETE\n"); - kfree(w); - binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); - } break; - case BINDER_WORK_DEAD_BINDER_AND_CLEAR: - case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: { - struct binder_ref_death *death; - - death = container_of(w, struct binder_ref_death, work); - binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, - "undelivered death notification, %016llx\n", - (u64)death->cookie); - kfree(death); - binder_stats_deleted(BINDER_STAT_DEATH); - } break; - default: - pr_err("unexpected work type, %d, not freed\n", - w->type); - break; - } - } - -} - -static struct binder_thread *binder_get_thread(struct binder_proc *proc) -{ - struct binder_thread *thread = NULL; - struct rb_node *parent = NULL; - struct rb_node **p = &proc->threads.rb_node; - - while (*p) { - parent = *p; - thread = rb_entry(parent, struct binder_thread, rb_node); - - if (current->pid < thread->pid) - p = &(*p)->rb_left; - else if (current->pid > thread->pid) - p = &(*p)->rb_right; - else - break; - } - if (*p == NULL) { - thread = kzalloc(sizeof(*thread), GFP_KERNEL); - if (thread == NULL) - return NULL; - binder_stats_created(BINDER_STAT_THREAD); - thread->proc = proc; - thread->pid = current->pid; - init_waitqueue_head(&thread->wait); - INIT_LIST_HEAD(&thread->todo); - rb_link_node(&thread->rb_node, parent, p); - rb_insert_color(&thread->rb_node, &proc->threads); - thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; - thread->return_error = BR_OK; - thread->return_error2 = BR_OK; - } - return thread; -} - -static int binder_free_thread(struct binder_proc *proc, - struct binder_thread *thread) -{ - struct binder_transaction *t; - struct binder_transaction *send_reply = NULL; - int active_transactions = 0; - - rb_erase(&thread->rb_node, &proc->threads); - t = thread->transaction_stack; - if (t && t->to_thread == thread) - send_reply = t; - while (t) { - active_transactions++; - binder_debug(BINDER_DEBUG_DEAD_TRANSACTION, - "release %d:%d transaction %d %s, still active\n", - proc->pid, thread->pid, - t->debug_id, - (t->to_thread == thread) ? "in" : "out"); - - if (t->to_thread == thread) { - t->to_proc = NULL; - t->to_thread = NULL; - if (t->buffer) { - t->buffer->transaction = NULL; - t->buffer = NULL; - } - t = t->to_parent; - } else if (t->from == thread) { - t->from = NULL; - t = t->from_parent; - } else - BUG(); - } - if (send_reply) - binder_send_failed_reply(send_reply, BR_DEAD_REPLY); - binder_release_work(&thread->todo); - kfree(thread); - binder_stats_deleted(BINDER_STAT_THREAD); - return active_transactions; -} - -static unsigned int binder_poll(struct file *filp, - struct poll_table_struct *wait) -{ - struct binder_proc *proc = filp->private_data; - struct binder_thread *thread = NULL; - int wait_for_proc_work; - - binder_lock(__func__); - - thread = binder_get_thread(proc); - - wait_for_proc_work = thread->transaction_stack == NULL && - list_empty(&thread->todo) && thread->return_error == BR_OK; - - binder_unlock(__func__); - - 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 int binder_ioctl_write_read(struct file *filp, - unsigned int cmd, unsigned long arg, - struct binder_thread *thread) -{ - int ret = 0; - struct binder_proc *proc = filp->private_data; - unsigned int size = _IOC_SIZE(cmd); - void __user *ubuf = (void __user *)arg; - struct binder_write_read bwr; - - if (size != sizeof(struct binder_write_read)) { - ret = -EINVAL; - goto out; - } - if (copy_from_user(&bwr, ubuf, sizeof(bwr))) { - ret = -EFAULT; - goto out; - } - binder_debug(BINDER_DEBUG_READ_WRITE, - "%d:%d write %lld at %016llx, read %lld at %016llx\n", - proc->pid, thread->pid, - (u64)bwr.write_size, (u64)bwr.write_buffer, - (u64)bwr.read_size, (u64)bwr.read_buffer); - - if (bwr.write_size > 0) { - ret = binder_thread_write(proc, thread, - bwr.write_buffer, - bwr.write_size, - &bwr.write_consumed); - trace_binder_write_done(ret); - if (ret < 0) { - bwr.read_consumed = 0; - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) - ret = -EFAULT; - goto out; - } - } - if (bwr.read_size > 0) { - ret = binder_thread_read(proc, thread, bwr.read_buffer, - bwr.read_size, - &bwr.read_consumed, - filp->f_flags & O_NONBLOCK); - trace_binder_read_done(ret); - if (!list_empty(&proc->todo)) - wake_up_interruptible(&proc->wait); - if (ret < 0) { - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) - ret = -EFAULT; - goto out; - } - } - binder_debug(BINDER_DEBUG_READ_WRITE, - "%d:%d wrote %lld of %lld, read return %lld of %lld\n", - proc->pid, thread->pid, - (u64)bwr.write_consumed, (u64)bwr.write_size, - (u64)bwr.read_consumed, (u64)bwr.read_size); - if (copy_to_user(ubuf, &bwr, sizeof(bwr))) { - ret = -EFAULT; - goto out; - } -out: - return ret; -} - -static int binder_ioctl_set_ctx_mgr(struct file *filp) -{ - int ret = 0; - struct binder_proc *proc = filp->private_data; - kuid_t curr_euid = current_euid(); - - if (binder_context_mgr_node != NULL) { - pr_err("BINDER_SET_CONTEXT_MGR already set\n"); - ret = -EBUSY; - goto out; - } - if (uid_valid(binder_context_mgr_uid)) { - if (!uid_eq(binder_context_mgr_uid, curr_euid)) { - pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n", - from_kuid(&init_user_ns, curr_euid), - from_kuid(&init_user_ns, - binder_context_mgr_uid)); - ret = -EPERM; - goto out; - } - } else { - binder_context_mgr_uid = curr_euid; - } - binder_context_mgr_node = binder_new_node(proc, 0, 0); - if (binder_context_mgr_node == NULL) { - ret = -ENOMEM; - goto out; - } - 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; -out: - return ret; -} - -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; - - /*pr_info("binder_ioctl: %d:%d %x %lx\n", - proc->pid, current->pid, cmd, arg);*/ - - trace_binder_ioctl(cmd, arg); - - ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); - if (ret) - goto err_unlocked; - - binder_lock(__func__); - thread = binder_get_thread(proc); - if (thread == NULL) { - ret = -ENOMEM; - goto err; - } - - switch (cmd) { - case BINDER_WRITE_READ: - ret = binder_ioctl_write_read(filp, cmd, arg, thread); - if (ret) - 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: - ret = binder_ioctl_set_ctx_mgr(filp); - if (ret) - goto err; - break; - case BINDER_THREAD_EXIT: - binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n", - proc->pid, thread->pid); - binder_free_thread(proc, thread); - thread = NULL; - break; - case BINDER_VERSION: { - struct binder_version __user *ver = ubuf; - - if (size != sizeof(struct binder_version)) { - ret = -EINVAL; - goto err; - } - if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, - &ver->protocol_version)) { - ret = -EINVAL; - goto err; - } - break; - } - default: - ret = -EINVAL; - goto err; - } - ret = 0; -err: - if (thread) - thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN; - binder_unlock(__func__); - wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2); - if (ret && ret != -ERESTARTSYS) - pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret); -err_unlocked: - trace_binder_ioctl_done(ret); - return ret; -} - -static void binder_vma_open(struct vm_area_struct *vma) -{ - struct binder_proc *proc = vma->vm_private_data; - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, - "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", - proc->pid, vma->vm_start, vma->vm_end, - (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, - (unsigned long)pgprot_val(vma->vm_page_prot)); -} - -static void binder_vma_close(struct vm_area_struct *vma) -{ - struct binder_proc *proc = vma->vm_private_data; - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, - "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n", - proc->pid, vma->vm_start, vma->vm_end, - (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, - (unsigned long)pgprot_val(vma->vm_page_prot)); - proc->vma = NULL; - proc->vma_vm_mm = NULL; - binder_defer_work(proc, BINDER_DEFERRED_PUT_FILES); -} - -static int binder_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) -{ - return VM_FAULT_SIGBUS; -} - -static struct vm_operations_struct binder_vm_ops = { - .open = binder_vma_open, - .close = binder_vma_close, - .fault = binder_vm_fault, -}; - -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 (proc->tsk != current) - return -EINVAL; - - if ((vma->vm_end - vma->vm_start) > SZ_4M) - vma->vm_end = vma->vm_start + SZ_4M; - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, - "binder_mmap: %d %lx-%lx (%ld K) vma %lx pagep %lx\n", - proc->pid, vma->vm_start, vma->vm_end, - (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags, - (unsigned long)pgprot_val(vma->vm_page_prot)); - - if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) { - ret = -EPERM; - failure_string = "bad vm_flags"; - goto err_bad_arg; - } - vma->vm_flags = (vma->vm_flags | VM_DONTCOPY) & ~VM_MAYWRITE; - - mutex_lock(&binder_mmap_lock); - if (proc->buffer) { - ret = -EBUSY; - failure_string = "already mapped"; - goto err_already_mapped; - } - - area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); - if (area == NULL) { - ret = -ENOMEM; - failure_string = "get_vm_area"; - goto err_get_vm_area_failed; - } - proc->buffer = area->addr; - proc->user_buffer_offset = vma->vm_start - (uintptr_t)proc->buffer; - mutex_unlock(&binder_mmap_lock); - -#ifdef CONFIG_CPU_CACHE_VIPT - if (cache_is_vipt_aliasing()) { - while (CACHE_COLOUR((vma->vm_start ^ (uint32_t)proc->buffer))) { - pr_info("binder_mmap: %d %lx-%lx maps %p bad alignment\n", proc->pid, vma->vm_start, vma->vm_end, proc->buffer); - vma->vm_start += PAGE_SIZE; - } - } -#endif - proc->pages = kzalloc(sizeof(proc->pages[0]) * ((vma->vm_end - vma->vm_start) / PAGE_SIZE), GFP_KERNEL); - if (proc->pages == NULL) { - ret = -ENOMEM; - failure_string = "alloc page array"; - goto err_alloc_pages_failed; - } - proc->buffer_size = vma->vm_end - vma->vm_start; - - vma->vm_ops = &binder_vm_ops; - vma->vm_private_data = proc; - - if (binder_update_page_range(proc, 1, proc->buffer, proc->buffer + PAGE_SIZE, vma)) { - ret = -ENOMEM; - failure_string = "alloc small buf"; - goto err_alloc_small_buf_failed; - } - buffer = proc->buffer; - INIT_LIST_HEAD(&proc->buffers); - list_add(&buffer->entry, &proc->buffers); - buffer->free = 1; - binder_insert_free_buffer(proc, buffer); - proc->free_async_space = proc->buffer_size / 2; - barrier(); - proc->files = get_files_struct(current); - proc->vma = vma; - proc->vma_vm_mm = vma->vm_mm; - - /*pr_info("binder_mmap: %d %lx-%lx maps %p\n", - proc->pid, vma->vm_start, vma->vm_end, proc->buffer);*/ - return 0; - -err_alloc_small_buf_failed: - kfree(proc->pages); - proc->pages = NULL; -err_alloc_pages_failed: - mutex_lock(&binder_mmap_lock); - vfree(proc->buffer); - proc->buffer = NULL; -err_get_vm_area_failed: -err_already_mapped: - mutex_unlock(&binder_mmap_lock); -err_bad_arg: - pr_err("binder_mmap: %d %lx-%lx %s failed %d\n", - proc->pid, vma->vm_start, vma->vm_end, failure_string, ret); - return ret; -} - -static int binder_open(struct inode *nodp, struct file *filp) -{ - struct binder_proc *proc; - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, "binder_open: %d:%d\n", - current->group_leader->pid, current->pid); - - proc = kzalloc(sizeof(*proc), GFP_KERNEL); - if (proc == NULL) - return -ENOMEM; - get_task_struct(current); - proc->tsk = current; - INIT_LIST_HEAD(&proc->todo); - init_waitqueue_head(&proc->wait); - proc->default_priority = task_nice(current); - - binder_lock(__func__); - - binder_stats_created(BINDER_STAT_PROC); - hlist_add_head(&proc->proc_node, &binder_procs); - proc->pid = current->group_leader->pid; - INIT_LIST_HEAD(&proc->delivered_death); - filp->private_data = proc; - - binder_unlock(__func__); - - if (binder_debugfs_dir_entry_proc) { - char strbuf[11]; - - snprintf(strbuf, sizeof(strbuf), "%u", proc->pid); - proc->debugfs_entry = debugfs_create_file(strbuf, S_IRUGO, - binder_debugfs_dir_entry_proc, proc, &binder_proc_fops); - } - - return 0; -} - -static int binder_flush(struct file *filp, fl_owner_t id) -{ - struct binder_proc *proc = filp->private_data; - - binder_defer_work(proc, BINDER_DEFERRED_FLUSH); - - return 0; -} - -static void binder_deferred_flush(struct binder_proc *proc) -{ - struct rb_node *n; - int wake_count = 0; - - for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) { - struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node); - - thread->looper |= BINDER_LOOPER_STATE_NEED_RETURN; - if (thread->looper & BINDER_LOOPER_STATE_WAITING) { - wake_up_interruptible(&thread->wait); - wake_count++; - } - } - wake_up_interruptible_all(&proc->wait); - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, - "binder_flush: %d woke %d threads\n", proc->pid, - wake_count); -} - -static int binder_release(struct inode *nodp, struct file *filp) -{ - struct binder_proc *proc = filp->private_data; - - debugfs_remove(proc->debugfs_entry); - binder_defer_work(proc, BINDER_DEFERRED_RELEASE); - - return 0; -} - -static int binder_node_release(struct binder_node *node, int refs) -{ - struct binder_ref *ref; - int death = 0; - - list_del_init(&node->work.entry); - binder_release_work(&node->async_todo); - - if (hlist_empty(&node->refs)) { - kfree(node); - binder_stats_deleted(BINDER_STAT_NODE); - - return refs; - } - - 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, &node->refs, node_entry) { - refs++; - - if (!ref->death) - continue; - - death++; - - if (list_empty(&ref->death->work.entry)) { - ref->death->work.type = BINDER_WORK_DEAD_BINDER; - list_add_tail(&ref->death->work.entry, - &ref->proc->todo); - wake_up_interruptible(&ref->proc->wait); - } else - BUG(); - } - - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "node %d now dead, refs %d, death %d\n", - node->debug_id, refs, death); - - return refs; -} - -static void binder_deferred_release(struct binder_proc *proc) -{ - struct binder_transaction *t; - struct rb_node *n; - int threads, nodes, incoming_refs, outgoing_refs, buffers, - active_transactions, page_count; - - BUG_ON(proc->vma); - BUG_ON(proc->files); - - hlist_del(&proc->proc_node); - - if (binder_context_mgr_node && binder_context_mgr_node->proc == proc) { - binder_debug(BINDER_DEBUG_DEAD_BINDER, - "%s: %d context_mgr_node gone\n", - __func__, proc->pid); - binder_context_mgr_node = NULL; - } - - threads = 0; - active_transactions = 0; - while ((n = rb_first(&proc->threads))) { - struct binder_thread *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; - - node = rb_entry(n, struct binder_node, rb_node); - nodes++; - rb_erase(&node->rb_node, &proc->nodes); - incoming_refs = binder_node_release(node, incoming_refs); - } - - outgoing_refs = 0; - while ((n = rb_first(&proc->refs_by_desc))) { - struct binder_ref *ref; - - ref = rb_entry(n, struct binder_ref, rb_node_desc); - outgoing_refs++; - binder_delete_ref(ref); - } - - binder_release_work(&proc->todo); - binder_release_work(&proc->delivered_death); - - buffers = 0; - while ((n = rb_first(&proc->allocated_buffers))) { - struct binder_buffer *buffer; - - buffer = rb_entry(n, struct binder_buffer, rb_node); - - t = buffer->transaction; - if (t) { - t->buffer = NULL; - buffer->transaction = NULL; - pr_err("release proc %d, transaction %d, not freed\n", - proc->pid, t->debug_id); - /*BUG();*/ - } - - binder_free_buf(proc, buffer); - buffers++; - } - - binder_stats_deleted(BINDER_STAT_PROC); - - page_count = 0; - if (proc->pages) { - int i; - - for (i = 0; i < proc->buffer_size / PAGE_SIZE; i++) { - void *page_addr; - - if (!proc->pages[i]) - continue; - - page_addr = proc->buffer + i * PAGE_SIZE; - binder_debug(BINDER_DEBUG_BUFFER_ALLOC, - "%s: %d: page %d at %p not freed\n", - __func__, proc->pid, i, page_addr); - unmap_kernel_range((unsigned long)page_addr, PAGE_SIZE); - __free_page(proc->pages[i]); - page_count++; - } - kfree(proc->pages); - vfree(proc->buffer); - } - - put_task_struct(proc->tsk); - - binder_debug(BINDER_DEBUG_OPEN_CLOSE, - "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d, buffers %d, pages %d\n", - __func__, proc->pid, threads, nodes, incoming_refs, - outgoing_refs, active_transactions, buffers, page_count); - - kfree(proc); -} - -static void binder_deferred_func(struct work_struct *work) -{ - struct binder_proc *proc; - struct files_struct *files; - - int defer; - - do { - binder_lock(__func__); - mutex_lock(&binder_deferred_lock); - if (!hlist_empty(&binder_deferred_list)) { - proc = hlist_entry(binder_deferred_list.first, - struct binder_proc, deferred_work_node); - hlist_del_init(&proc->deferred_work_node); - defer = proc->deferred_work; - proc->deferred_work = 0; - } else { - proc = NULL; - defer = 0; - } - mutex_unlock(&binder_deferred_lock); - - files = NULL; - if (defer & BINDER_DEFERRED_PUT_FILES) { - files = proc->files; - if (files) - proc->files = NULL; - } - - if (defer & BINDER_DEFERRED_FLUSH) - binder_deferred_flush(proc); - - if (defer & BINDER_DEFERRED_RELEASE) - binder_deferred_release(proc); /* frees proc */ - - binder_unlock(__func__); - if (files) - put_files_struct(files); - } while (proc); -} -static DECLARE_WORK(binder_deferred_work, binder_deferred_func); - -static void -binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer) -{ - mutex_lock(&binder_deferred_lock); - proc->deferred_work |= defer; - if (hlist_unhashed(&proc->deferred_work_node)) { - hlist_add_head(&proc->deferred_work_node, - &binder_deferred_list); - queue_work(binder_deferred_workqueue, &binder_deferred_work); - } - mutex_unlock(&binder_deferred_lock); -} - -static void print_binder_transaction(struct seq_file *m, const char *prefix, - struct binder_transaction *t) -{ - seq_printf(m, - "%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 (t->buffer == NULL) { - seq_puts(m, " buffer free\n"); - return; - } - if (t->buffer->target_node) - seq_printf(m, " node %d", - t->buffer->target_node->debug_id); - seq_printf(m, " size %zd:%zd data %p\n", - t->buffer->data_size, t->buffer->offsets_size, - t->buffer->data); -} - -static void print_binder_buffer(struct seq_file *m, const char *prefix, - struct binder_buffer *buffer) -{ - seq_printf(m, "%s %d: %p size %zd:%zd %s\n", - prefix, buffer->debug_id, buffer->data, - buffer->data_size, buffer->offsets_size, - buffer->transaction ? "active" : "delivered"); -} - -static void print_binder_work(struct seq_file *m, 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); - print_binder_transaction(m, transaction_prefix, t); - break; - case BINDER_WORK_TRANSACTION_COMPLETE: - seq_printf(m, "%stransaction complete\n", prefix); - break; - case BINDER_WORK_NODE: - node = container_of(w, struct binder_node, work); - seq_printf(m, "%snode work %d: u%016llx c%016llx\n", - prefix, node->debug_id, - (u64)node->ptr, (u64)node->cookie); - break; - case BINDER_WORK_DEAD_BINDER: - seq_printf(m, "%shas dead binder\n", prefix); - break; - case BINDER_WORK_DEAD_BINDER_AND_CLEAR: - seq_printf(m, "%shas cleared dead binder\n", prefix); - break; - case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: - seq_printf(m, "%shas cleared death notification\n", prefix); - break; - default: - seq_printf(m, "%sunknown work: type %d\n", prefix, w->type); - break; - } -} - -static void print_binder_thread(struct seq_file *m, - struct binder_thread *thread, - int print_always) -{ - struct binder_transaction *t; - struct binder_work *w; - size_t start_pos = m->count; - size_t header_pos; - - seq_printf(m, " thread %d: l %02x\n", thread->pid, thread->looper); - header_pos = m->count; - t = thread->transaction_stack; - while (t) { - if (t->from == thread) { - print_binder_transaction(m, - " outgoing transaction", t); - t = t->from_parent; - } else if (t->to_thread == thread) { - print_binder_transaction(m, - " incoming transaction", t); - t = t->to_parent; - } else { - print_binder_transaction(m, " bad transaction", t); - t = NULL; - } - } - list_for_each_entry(w, &thread->todo, entry) { - print_binder_work(m, " ", " pending transaction", w); - } - if (!print_always && m->count == header_pos) - m->count = start_pos; -} - -static void print_binder_node(struct seq_file *m, struct binder_node *node) -{ - struct binder_ref *ref; - struct binder_work *w; - int count; - - count = 0; - hlist_for_each_entry(ref, &node->refs, node_entry) - count++; - - seq_printf(m, " node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d", - node->debug_id, (u64)node->ptr, (u64)node->cookie, - node->has_strong_ref, node->has_weak_ref, - node->local_strong_refs, node->local_weak_refs, - node->internal_strong_refs, count); - if (count) { - seq_puts(m, " proc"); - hlist_for_each_entry(ref, &node->refs, node_entry) - seq_printf(m, " %d", ref->proc->pid); - } - seq_puts(m, "\n"); - list_for_each_entry(w, &node->async_todo, entry) - print_binder_work(m, " ", - " pending async transaction", w); -} - -static void print_binder_ref(struct seq_file *m, struct binder_ref *ref) -{ - seq_printf(m, " 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); -} - -static void print_binder_proc(struct seq_file *m, - struct binder_proc *proc, int print_all) -{ - struct binder_work *w; - struct rb_node *n; - size_t start_pos = m->count; - size_t header_pos; - - seq_printf(m, "proc %d\n", proc->pid); - header_pos = m->count; - - for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) - print_binder_thread(m, rb_entry(n, struct binder_thread, - rb_node), print_all); - for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) { - struct binder_node *node = rb_entry(n, struct binder_node, - rb_node); - if (print_all || node->has_async_transaction) - print_binder_node(m, node); - } - if (print_all) { - for (n = rb_first(&proc->refs_by_desc); - n != NULL; - n = rb_next(n)) - print_binder_ref(m, rb_entry(n, struct binder_ref, - rb_node_desc)); - } - for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) - print_binder_buffer(m, " buffer", - rb_entry(n, struct binder_buffer, rb_node)); - list_for_each_entry(w, &proc->todo, entry) - print_binder_work(m, " ", " pending transaction", w); - list_for_each_entry(w, &proc->delivered_death, entry) { - seq_puts(m, " has delivered dead binder\n"); - break; - } - if (!print_all && m->count == header_pos) - m->count = start_pos; -} - -static const char * const 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 * const 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 * const binder_objstat_strings[] = { - "proc", - "thread", - "node", - "ref", - "death", - "transaction", - "transaction_complete" -}; - -static void print_binder_stats(struct seq_file *m, 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]) - seq_printf(m, "%s%s: %d\n", prefix, - binder_command_strings[i], stats->bc[i]); - } - - 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]) - seq_printf(m, "%s%s: %d\n", prefix, - binder_return_strings[i], stats->br[i]); - } - - 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]) - seq_printf(m, "%s%s: active %d total %d\n", prefix, - binder_objstat_strings[i], - stats->obj_created[i] - stats->obj_deleted[i], - stats->obj_created[i]); - } -} - -static void print_binder_proc_stats(struct seq_file *m, - struct binder_proc *proc) -{ - struct binder_work *w; - struct rb_node *n; - int count, strong, weak; - - seq_printf(m, "proc %d\n", proc->pid); - count = 0; - for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) - count++; - seq_printf(m, " threads: %d\n", count); - seq_printf(m, " requested threads: %d+%d/%d\n" - " ready threads %d\n" - " free async space %zd\n", proc->requested_threads, - proc->requested_threads_started, proc->max_threads, - proc->ready_threads, proc->free_async_space); - count = 0; - for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) - count++; - seq_printf(m, " nodes: %d\n", count); - 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; - } - seq_printf(m, " refs: %d s %d w %d\n", count, strong, weak); - - count = 0; - for (n = rb_first(&proc->allocated_buffers); n != NULL; n = rb_next(n)) - count++; - seq_printf(m, " buffers: %d\n", count); - - count = 0; - list_for_each_entry(w, &proc->todo, entry) { - switch (w->type) { - case BINDER_WORK_TRANSACTION: - count++; - break; - default: - break; - } - } - seq_printf(m, " pending transactions: %d\n", count); - - print_binder_stats(m, " ", &proc->stats); -} - - -static int binder_state_show(struct seq_file *m, void *unused) -{ - struct binder_proc *proc; - struct binder_node *node; - int do_lock = !binder_debug_no_lock; - - if (do_lock) - binder_lock(__func__); - - seq_puts(m, "binder state:\n"); - - if (!hlist_empty(&binder_dead_nodes)) - seq_puts(m, "dead nodes:\n"); - hlist_for_each_entry(node, &binder_dead_nodes, dead_node) - print_binder_node(m, node); - - hlist_for_each_entry(proc, &binder_procs, proc_node) - print_binder_proc(m, proc, 1); - if (do_lock) - binder_unlock(__func__); - return 0; -} - -static int binder_stats_show(struct seq_file *m, void *unused) -{ - struct binder_proc *proc; - int do_lock = !binder_debug_no_lock; - - if (do_lock) - binder_lock(__func__); - - seq_puts(m, "binder stats:\n"); - - print_binder_stats(m, "", &binder_stats); - - hlist_for_each_entry(proc, &binder_procs, proc_node) - print_binder_proc_stats(m, proc); - if (do_lock) - binder_unlock(__func__); - return 0; -} - -static int binder_transactions_show(struct seq_file *m, void *unused) -{ - struct binder_proc *proc; - int do_lock = !binder_debug_no_lock; - - if (do_lock) - binder_lock(__func__); - - seq_puts(m, "binder transactions:\n"); - hlist_for_each_entry(proc, &binder_procs, proc_node) - print_binder_proc(m, proc, 0); - if (do_lock) - binder_unlock(__func__); - return 0; -} - -static int binder_proc_show(struct seq_file *m, void *unused) -{ - struct binder_proc *proc = m->private; - int do_lock = !binder_debug_no_lock; - - if (do_lock) - binder_lock(__func__); - seq_puts(m, "binder proc state:\n"); - print_binder_proc(m, proc, 1); - if (do_lock) - binder_unlock(__func__); - return 0; -} - -static void print_binder_transaction_log_entry(struct seq_file *m, - struct binder_transaction_log_entry *e) -{ - seq_printf(m, - "%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); -} - -static int binder_transaction_log_show(struct seq_file *m, void *unused) -{ - struct binder_transaction_log *log = m->private; - int i; - - if (log->full) { - for (i = log->next; i < ARRAY_SIZE(log->entry); i++) - print_binder_transaction_log_entry(m, &log->entry[i]); - } - for (i = 0; i < log->next; i++) - print_binder_transaction_log_entry(m, &log->entry[i]); - return 0; -} - -static const struct file_operations binder_fops = { - .owner = THIS_MODULE, - .poll = binder_poll, - .unlocked_ioctl = binder_ioctl, - .compat_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 -}; - -BINDER_DEBUG_ENTRY(state); -BINDER_DEBUG_ENTRY(stats); -BINDER_DEBUG_ENTRY(transactions); -BINDER_DEBUG_ENTRY(transaction_log); - -static int __init binder_init(void) -{ - int ret; - - binder_deferred_workqueue = create_singlethread_workqueue("binder"); - if (!binder_deferred_workqueue) - return -ENOMEM; - - binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL); - if (binder_debugfs_dir_entry_root) - binder_debugfs_dir_entry_proc = debugfs_create_dir("proc", - binder_debugfs_dir_entry_root); - ret = misc_register(&binder_miscdev); - if (binder_debugfs_dir_entry_root) { - debugfs_create_file("state", - S_IRUGO, - binder_debugfs_dir_entry_root, - NULL, - &binder_state_fops); - debugfs_create_file("stats", - S_IRUGO, - binder_debugfs_dir_entry_root, - NULL, - &binder_stats_fops); - debugfs_create_file("transactions", - S_IRUGO, - binder_debugfs_dir_entry_root, - NULL, - &binder_transactions_fops); - debugfs_create_file("transaction_log", - S_IRUGO, - binder_debugfs_dir_entry_root, - &binder_transaction_log, - &binder_transaction_log_fops); - debugfs_create_file("failed_transaction_log", - S_IRUGO, - binder_debugfs_dir_entry_root, - &binder_transaction_log_failed, - &binder_transaction_log_fops); - } - return ret; -} - -device_initcall(binder_init); - -#define CREATE_TRACE_POINTS -#include "binder_trace.h" - -MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h deleted file mode 100644 index eb0834656dfe..000000000000 --- a/drivers/staging/android/binder.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Copyright (C) 2008 Google, Inc. - * - * Based on, but no longer compatible with, the original - * OpenBinder.org binder driver interface, which is: - * - * Copyright (c) 2005 Palmsource, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#ifndef _LINUX_BINDER_H -#define _LINUX_BINDER_H - -#ifdef CONFIG_ANDROID_BINDER_IPC_32BIT -#define BINDER_IPC_32BIT 1 -#endif - -#include "uapi/binder.h" - -#endif /* _LINUX_BINDER_H */ - diff --git a/drivers/staging/android/binder_trace.h b/drivers/staging/android/binder_trace.h deleted file mode 100644 index 7f20f3dc8369..000000000000 --- a/drivers/staging/android/binder_trace.h +++ /dev/null @@ -1,329 +0,0 @@ -/* - * Copyright (C) 2012 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. - * - */ - -#undef TRACE_SYSTEM -#define TRACE_SYSTEM binder - -#if !defined(_BINDER_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) -#define _BINDER_TRACE_H - -#include <linux/tracepoint.h> - -struct binder_buffer; -struct binder_node; -struct binder_proc; -struct binder_ref; -struct binder_thread; -struct binder_transaction; - -TRACE_EVENT(binder_ioctl, - TP_PROTO(unsigned int cmd, unsigned long arg), - TP_ARGS(cmd, arg), - - TP_STRUCT__entry( - __field(unsigned int, cmd) - __field(unsigned long, arg) - ), - TP_fast_assign( - __entry->cmd = cmd; - __entry->arg = arg; - ), - TP_printk("cmd=0x%x arg=0x%lx", __entry->cmd, __entry->arg) -); - -DECLARE_EVENT_CLASS(binder_lock_class, - TP_PROTO(const char *tag), - TP_ARGS(tag), - TP_STRUCT__entry( - __field(const char *, tag) - ), - TP_fast_assign( - __entry->tag = tag; - ), - TP_printk("tag=%s", __entry->tag) -); - -#define DEFINE_BINDER_LOCK_EVENT(name) \ -DEFINE_EVENT(binder_lock_class, name, \ - TP_PROTO(const char *func), \ - TP_ARGS(func)) - -DEFINE_BINDER_LOCK_EVENT(binder_lock); -DEFINE_BINDER_LOCK_EVENT(binder_locked); -DEFINE_BINDER_LOCK_EVENT(binder_unlock); - -DECLARE_EVENT_CLASS(binder_function_return_class, - TP_PROTO(int ret), - TP_ARGS(ret), - TP_STRUCT__entry( - __field(int, ret) - ), - TP_fast_assign( - __entry->ret = ret; - ), - TP_printk("ret=%d", __entry->ret) -); - -#define DEFINE_BINDER_FUNCTION_RETURN_EVENT(name) \ -DEFINE_EVENT(binder_function_return_class, name, \ - TP_PROTO(int ret), \ - TP_ARGS(ret)) - -DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_ioctl_done); -DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_write_done); -DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_read_done); - -TRACE_EVENT(binder_wait_for_work, - TP_PROTO(bool proc_work, bool transaction_stack, bool thread_todo), - TP_ARGS(proc_work, transaction_stack, thread_todo), - - TP_STRUCT__entry( - __field(bool, proc_work) - __field(bool, transaction_stack) - __field(bool, thread_todo) - ), - TP_fast_assign( - __entry->proc_work = proc_work; - __entry->transaction_stack = transaction_stack; - __entry->thread_todo = thread_todo; - ), - TP_printk("proc_work=%d transaction_stack=%d thread_todo=%d", - __entry->proc_work, __entry->transaction_stack, - __entry->thread_todo) -); - -TRACE_EVENT(binder_transaction, - TP_PROTO(bool reply, struct binder_transaction *t, - struct binder_node *target_node), - TP_ARGS(reply, t, target_node), - TP_STRUCT__entry( - __field(int, debug_id) - __field(int, target_node) - __field(int, to_proc) - __field(int, to_thread) - __field(int, reply) - __field(unsigned int, code) - __field(unsigned int, flags) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - __entry->target_node = target_node ? target_node->debug_id : 0; - __entry->to_proc = t->to_proc->pid; - __entry->to_thread = t->to_thread ? t->to_thread->pid : 0; - __entry->reply = reply; - __entry->code = t->code; - __entry->flags = t->flags; - ), - TP_printk("transaction=%d dest_node=%d dest_proc=%d dest_thread=%d reply=%d flags=0x%x code=0x%x", - __entry->debug_id, __entry->target_node, - __entry->to_proc, __entry->to_thread, - __entry->reply, __entry->flags, __entry->code) -); - -TRACE_EVENT(binder_transaction_received, - TP_PROTO(struct binder_transaction *t), - TP_ARGS(t), - - TP_STRUCT__entry( - __field(int, debug_id) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - ), - TP_printk("transaction=%d", __entry->debug_id) -); - -TRACE_EVENT(binder_transaction_node_to_ref, - TP_PROTO(struct binder_transaction *t, struct binder_node *node, - struct binder_ref *ref), - TP_ARGS(t, node, ref), - - TP_STRUCT__entry( - __field(int, debug_id) - __field(int, node_debug_id) - __field(binder_uintptr_t, node_ptr) - __field(int, ref_debug_id) - __field(uint32_t, ref_desc) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - __entry->node_debug_id = node->debug_id; - __entry->node_ptr = node->ptr; - __entry->ref_debug_id = ref->debug_id; - __entry->ref_desc = ref->desc; - ), - TP_printk("transaction=%d node=%d src_ptr=0x%016llx ==> dest_ref=%d dest_desc=%d", - __entry->debug_id, __entry->node_debug_id, - (u64)__entry->node_ptr, - __entry->ref_debug_id, __entry->ref_desc) -); - -TRACE_EVENT(binder_transaction_ref_to_node, - TP_PROTO(struct binder_transaction *t, struct binder_ref *ref), - TP_ARGS(t, ref), - - TP_STRUCT__entry( - __field(int, debug_id) - __field(int, ref_debug_id) - __field(uint32_t, ref_desc) - __field(int, node_debug_id) - __field(binder_uintptr_t, node_ptr) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - __entry->ref_debug_id = ref->debug_id; - __entry->ref_desc = ref->desc; - __entry->node_debug_id = ref->node->debug_id; - __entry->node_ptr = ref->node->ptr; - ), - TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ptr=0x%016llx", - __entry->debug_id, __entry->node_debug_id, - __entry->ref_debug_id, __entry->ref_desc, - (u64)__entry->node_ptr) -); - -TRACE_EVENT(binder_transaction_ref_to_ref, - TP_PROTO(struct binder_transaction *t, struct binder_ref *src_ref, - struct binder_ref *dest_ref), - TP_ARGS(t, src_ref, dest_ref), - - TP_STRUCT__entry( - __field(int, debug_id) - __field(int, node_debug_id) - __field(int, src_ref_debug_id) - __field(uint32_t, src_ref_desc) - __field(int, dest_ref_debug_id) - __field(uint32_t, dest_ref_desc) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - __entry->node_debug_id = src_ref->node->debug_id; - __entry->src_ref_debug_id = src_ref->debug_id; - __entry->src_ref_desc = src_ref->desc; - __entry->dest_ref_debug_id = dest_ref->debug_id; - __entry->dest_ref_desc = dest_ref->desc; - ), - TP_printk("transaction=%d node=%d src_ref=%d src_desc=%d ==> dest_ref=%d dest_desc=%d", - __entry->debug_id, __entry->node_debug_id, - __entry->src_ref_debug_id, __entry->src_ref_desc, - __entry->dest_ref_debug_id, __entry->dest_ref_desc) -); - -TRACE_EVENT(binder_transaction_fd, - TP_PROTO(struct binder_transaction *t, int src_fd, int dest_fd), - TP_ARGS(t, src_fd, dest_fd), - - TP_STRUCT__entry( - __field(int, debug_id) - __field(int, src_fd) - __field(int, dest_fd) - ), - TP_fast_assign( - __entry->debug_id = t->debug_id; - __entry->src_fd = src_fd; - __entry->dest_fd = dest_fd; - ), - TP_printk("transaction=%d src_fd=%d ==> dest_fd=%d", - __entry->debug_id, __entry->src_fd, __entry->dest_fd) -); - -DECLARE_EVENT_CLASS(binder_buffer_class, - TP_PROTO(struct binder_buffer *buf), - TP_ARGS(buf), - TP_STRUCT__entry( - __field(int, debug_id) - __field(size_t, data_size) - __field(size_t, offsets_size) - ), - TP_fast_assign( - __entry->debug_id = buf->debug_id; - __entry->data_size = buf->data_size; - __entry->offsets_size = buf->offsets_size; - ), - TP_printk("transaction=%d data_size=%zd offsets_size=%zd", - __entry->debug_id, __entry->data_size, __entry->offsets_size) -); - -DEFINE_EVENT(binder_buffer_class, binder_transaction_alloc_buf, - TP_PROTO(struct binder_buffer *buffer), - TP_ARGS(buffer)); - -DEFINE_EVENT(binder_buffer_class, binder_transaction_buffer_release, - TP_PROTO(struct binder_buffer *buffer), - TP_ARGS(buffer)); - -DEFINE_EVENT(binder_buffer_class, binder_transaction_failed_buffer_release, - TP_PROTO(struct binder_buffer *buffer), - TP_ARGS(buffer)); - -TRACE_EVENT(binder_update_page_range, - TP_PROTO(struct binder_proc *proc, bool allocate, - void *start, void *end), - TP_ARGS(proc, allocate, start, end), - TP_STRUCT__entry( - __field(int, proc) - __field(bool, allocate) - __field(size_t, offset) - __field(size_t, size) - ), - TP_fast_assign( - __entry->proc = proc->pid; - __entry->allocate = allocate; - __entry->offset = start - proc->buffer; - __entry->size = end - start; - ), - TP_printk("proc=%d allocate=%d offset=%zu size=%zu", - __entry->proc, __entry->allocate, - __entry->offset, __entry->size) -); - -TRACE_EVENT(binder_command, - TP_PROTO(uint32_t cmd), - TP_ARGS(cmd), - TP_STRUCT__entry( - __field(uint32_t, cmd) - ), - TP_fast_assign( - __entry->cmd = cmd; - ), - TP_printk("cmd=0x%x %s", - __entry->cmd, - _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_command_strings) ? - binder_command_strings[_IOC_NR(__entry->cmd)] : - "unknown") -); - -TRACE_EVENT(binder_return, - TP_PROTO(uint32_t cmd), - TP_ARGS(cmd), - TP_STRUCT__entry( - __field(uint32_t, cmd) - ), - TP_fast_assign( - __entry->cmd = cmd; - ), - TP_printk("cmd=0x%x %s", - __entry->cmd, - _IOC_NR(__entry->cmd) < ARRAY_SIZE(binder_return_strings) ? - binder_return_strings[_IOC_NR(__entry->cmd)] : - "unknown") -); - -#endif /* _BINDER_TRACE_H */ - -#undef TRACE_INCLUDE_PATH -#undef TRACE_INCLUDE_FILE -#define TRACE_INCLUDE_PATH . -#define TRACE_INCLUDE_FILE binder_trace -#include <trace/define_trace.h> diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 56604f41ec48..296d347660fc 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -250,7 +250,7 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap, our systems the only dma_address space is physical addresses. Additionally, we can't afford the overhead of invalidating every allocation via dma_map_sg. The implicit contract here is that - memory comming from the heaps is ready for dma, ie if it has a + memory coming from the heaps is ready for dma, ie if it has a cached mapping that mapping has been invalidated */ for_each_sg(buffer->sg_table->sgl, sg, buffer->sg_table->nents, i) sg_dma_address(sg) = sg_phys(sg); @@ -263,8 +263,7 @@ err: heap->ops->unmap_dma(heap, buffer); heap->ops->free(buffer); err1: - if (buffer->pages) - vfree(buffer->pages); + vfree(buffer->pages); err2: kfree(buffer); return ERR_PTR(ret); @@ -276,8 +275,7 @@ void ion_buffer_destroy(struct ion_buffer *buffer) buffer->heap->ops->unmap_kernel(buffer->heap, buffer); buffer->heap->ops->unmap_dma(buffer->heap, buffer); buffer->heap->ops->free(buffer); - if (buffer->pages) - vfree(buffer->pages); + vfree(buffer->pages); kfree(buffer); } @@ -902,7 +900,7 @@ void ion_pages_sync_for_device(struct device *dev, struct page *page, sg_set_page(&sg, page, size, 0); /* * This is not correct - sg_dma_address needs a dma_addr_t that is valid - * for the the targeted device, but this works on the currently targeted + * for the targeted device, but this works on the currently targeted * hardware. */ sg_dma_address(&sg) = page_to_phys(page); diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h index d305bb7e9a74..443db8459a9e 100644 --- a/drivers/staging/android/ion/ion.h +++ b/drivers/staging/android/ion/ion.h @@ -76,7 +76,7 @@ struct ion_platform_data { * size * * Calls memblock reserve to set aside memory for heaps that are - * located at specific memory addresses or of specfic sizes not + * located at specific memory addresses or of specific sizes not * managed by the kernel */ void ion_reserve(struct ion_platform_data *data); diff --git a/drivers/staging/android/ion/ion_dummy_driver.c b/drivers/staging/android/ion/ion_dummy_driver.c index f3ea1c31e533..5678870bff48 100644 --- a/drivers/staging/android/ion/ion_dummy_driver.c +++ b/drivers/staging/android/ion/ion_dummy_driver.c @@ -112,10 +112,8 @@ static int __init ion_dummy_init(void) } return 0; err: - for (i = 0; i < dummy_ion_pdata.nr; i++) { - if (heaps[i]) - ion_heap_destroy(heaps[i]); - } + for (i = 0; i < dummy_ion_pdata.nr; ++i) + ion_heap_destroy(heaps[i]); kfree(heaps); if (carveout_ptr) { diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c index 5864f3dfcbc6..4b88f11e52d3 100644 --- a/drivers/staging/android/ion/ion_page_pool.c +++ b/drivers/staging/android/ion/ion_page_pool.c @@ -120,7 +120,7 @@ int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask, bool high; if (current_is_kswapd()) - high = 1; + high = true; else high = !!(gfp_mask & __GFP_HIGHMEM); diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h index c8f01757abfa..18a5f93e13b7 100644 --- a/drivers/staging/android/ion/ion_priv.h +++ b/drivers/staging/android/ion/ion_priv.h @@ -345,7 +345,7 @@ void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr, * functions for creating and destroying a heap pool -- allows you * to keep a pool of pre allocated memory to use from your heap. Keeping * a pool of memory that is ready for dma, ie any cached mapping have been - * invalidated from the cache, provides a significant peformance benefit on + * invalidated from the cache, provides a significant performance benefit on * many systems */ /** @@ -362,7 +362,7 @@ void ion_carveout_free(struct ion_heap *heap, ion_phys_addr_t addr, * * Allows you to keep a pool of pre allocated pages to use from your heap. * Keeping a pool of pages that is ready for dma, ie any cached mapping have - * been invalidated from the cache, provides a significant peformance benefit + * been invalidated from the cache, provides a significant performance benefit * on many systems */ struct ion_page_pool { diff --git a/drivers/staging/android/ion/tegra/tegra_ion.c b/drivers/staging/android/ion/tegra/tegra_ion.c index 11c7cceb3c7d..5b8ef0e66010 100644 --- a/drivers/staging/android/ion/tegra/tegra_ion.c +++ b/drivers/staging/android/ion/tegra/tegra_ion.c @@ -54,10 +54,8 @@ static int tegra_ion_probe(struct platform_device *pdev) platform_set_drvdata(pdev, idev); return 0; err: - for (i = 0; i < num_heaps; i++) { - if (heaps[i]) - ion_heap_destroy(heaps[i]); - } + for (i = 0; i < num_heaps; ++i) + ion_heap_destroy(heaps[i]); return err; } diff --git a/drivers/staging/android/sync_debug.c b/drivers/staging/android/sync_debug.c index 257fc91bf02b..1532a86404be 100644 --- a/drivers/staging/android/sync_debug.c +++ b/drivers/staging/android/sync_debug.c @@ -25,6 +25,7 @@ #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/anon_inodes.h> +#include <linux/time64.h> #include "sync.h" #ifdef CONFIG_DEBUG_FS @@ -95,9 +96,9 @@ static void sync_print_pt(struct seq_file *s, struct sync_pt *pt, bool fence) sync_status_str(status)); if (status <= 0) { - struct timeval tv = ktime_to_timeval(pt->base.timestamp); + struct timespec64 ts64 = ktime_to_timespec64(pt->base.timestamp); - seq_printf(s, "@%ld.%06ld", tv.tv_sec, tv.tv_usec); + seq_printf(s, "@%lld.%09ld", (s64)ts64.tv_sec, ts64.tv_nsec); } if (parent->ops->timeline_value_str && diff --git a/drivers/staging/android/timed_gpio.c b/drivers/staging/android/timed_gpio.c index 8fa4758517c0..938a35cd99bb 100644 --- a/drivers/staging/android/timed_gpio.c +++ b/drivers/staging/android/timed_gpio.c @@ -20,6 +20,7 @@ #include <linux/hrtimer.h> #include <linux/err.h> #include <linux/gpio.h> +#include <linux/ktime.h> #include "timed_output.h" #include "timed_gpio.h" @@ -46,16 +47,16 @@ static enum hrtimer_restart gpio_timer_func(struct hrtimer *timer) static int gpio_get_time(struct timed_output_dev *dev) { struct timed_gpio_data *data; - struct timeval t; + ktime_t t; data = container_of(dev, struct timed_gpio_data, dev); if (!hrtimer_active(&data->timer)) return 0; - t = ktime_to_timeval(hrtimer_get_remaining(&data->timer)); + t = hrtimer_get_remaining(&data->timer); - return t.tv_sec * 1000 + t.tv_usec / 1000; + return ktime_to_ms(t); } static void gpio_enable(struct timed_output_dev *dev, int value) @@ -157,7 +158,6 @@ static struct platform_driver timed_gpio_driver = { .remove = timed_gpio_remove, .driver = { .name = TIMED_GPIO_NAME, - .owner = THIS_MODULE, }, }; diff --git a/drivers/staging/android/uapi/binder.h b/drivers/staging/android/uapi/binder.h deleted file mode 100644 index dba4cef3a8d3..000000000000 --- a/drivers/staging/android/uapi/binder.h +++ /dev/null @@ -1,351 +0,0 @@ -/* - * Copyright (C) 2008 Google, Inc. - * - * Based on, but no longer compatible with, the original - * OpenBinder.org binder driver interface, which is: - * - * Copyright (c) 2005 Palmsource, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#ifndef _UAPI_LINUX_BINDER_H -#define _UAPI_LINUX_BINDER_H - -#include <linux/ioctl.h> - -#define B_PACK_CHARS(c1, c2, c3, c4) \ - ((((c1)<<24)) | (((c2)<<16)) | (((c3)<<8)) | (c4)) -#define B_TYPE_LARGE 0x85 - -enum { - BINDER_TYPE_BINDER = B_PACK_CHARS('s', 'b', '*', B_TYPE_LARGE), - BINDER_TYPE_WEAK_BINDER = B_PACK_CHARS('w', 'b', '*', B_TYPE_LARGE), - BINDER_TYPE_HANDLE = B_PACK_CHARS('s', 'h', '*', B_TYPE_LARGE), - BINDER_TYPE_WEAK_HANDLE = B_PACK_CHARS('w', 'h', '*', B_TYPE_LARGE), - BINDER_TYPE_FD = B_PACK_CHARS('f', 'd', '*', B_TYPE_LARGE), -}; - -enum { - FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff, - FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100, -}; - -#ifdef BINDER_IPC_32BIT -typedef __u32 binder_size_t; -typedef __u32 binder_uintptr_t; -#else -typedef __u64 binder_size_t; -typedef __u64 binder_uintptr_t; -#endif - -/* - * This is the flattened representation of a Binder object for transfer - * between processes. The 'offsets' supplied as part of a binder transaction - * contains offsets into the data where these structures occur. The Binder - * driver takes care of re-writing the structure type and data as it moves - * between processes. - */ -struct flat_binder_object { - /* 8 bytes for large_flat_header. */ - __u32 type; - __u32 flags; - - /* 8 bytes of data. */ - union { - binder_uintptr_t binder; /* local object */ - __u32 handle; /* remote object */ - }; - - /* extra data associated with local object */ - binder_uintptr_t cookie; -}; - -/* - * On 64-bit platforms where user code may run in 32-bits the driver must - * translate the buffer (and local binder) addresses appropriately. - */ - -struct binder_write_read { - binder_size_t write_size; /* bytes to write */ - binder_size_t write_consumed; /* bytes consumed by driver */ - binder_uintptr_t write_buffer; - binder_size_t read_size; /* bytes to read */ - binder_size_t read_consumed; /* bytes consumed by driver */ - binder_uintptr_t read_buffer; -}; - -/* Use with BINDER_VERSION, driver fills in fields. */ -struct binder_version { - /* driver protocol version -- increment with incompatible change */ - __s32 protocol_version; -}; - -/* This is the current protocol version. */ -#ifdef BINDER_IPC_32BIT -#define BINDER_CURRENT_PROTOCOL_VERSION 7 -#else -#define BINDER_CURRENT_PROTOCOL_VERSION 8 -#endif - -#define BINDER_WRITE_READ _IOWR('b', 1, struct binder_write_read) -#define BINDER_SET_IDLE_TIMEOUT _IOW('b', 3, __s64) -#define BINDER_SET_MAX_THREADS _IOW('b', 5, __u32) -#define BINDER_SET_IDLE_PRIORITY _IOW('b', 6, __s32) -#define BINDER_SET_CONTEXT_MGR _IOW('b', 7, __s32) -#define BINDER_THREAD_EXIT _IOW('b', 8, __s32) -#define BINDER_VERSION _IOWR('b', 9, struct binder_version) - -/* - * NOTE: Two special error codes you should check for when calling - * in to the driver are: - * - * EINTR -- The operation has been interupted. This should be - * handled by retrying the ioctl() until a different error code - * is returned. - * - * ECONNREFUSED -- The driver is no longer accepting operations - * from your process. That is, the process is being destroyed. - * You should handle this by exiting from your process. Note - * that once this error code is returned, all further calls to - * the driver from any thread will return this same code. - */ - -enum transaction_flags { - TF_ONE_WAY = 0x01, /* this is a one-way call: async, no return */ - TF_ROOT_OBJECT = 0x04, /* contents are the component's root object */ - TF_STATUS_CODE = 0x08, /* contents are a 32-bit status code */ - TF_ACCEPT_FDS = 0x10, /* allow replies with file descriptors */ -}; - -struct binder_transaction_data { - /* The first two are only used for bcTRANSACTION and brTRANSACTION, - * identifying the target and contents of the transaction. - */ - union { - /* target descriptor of command transaction */ - __u32 handle; - /* target descriptor of return transaction */ - binder_uintptr_t ptr; - } target; - binder_uintptr_t cookie; /* target object cookie */ - __u32 code; /* transaction command */ - - /* General information about the transaction. */ - __u32 flags; - pid_t sender_pid; - uid_t sender_euid; - binder_size_t data_size; /* number of bytes of data */ - binder_size_t offsets_size; /* number of bytes of offsets */ - - /* If this transaction is inline, the data immediately - * follows here; otherwise, it ends with a pointer to - * the data buffer. - */ - union { - struct { - /* transaction data */ - binder_uintptr_t buffer; - /* offsets from buffer to flat_binder_object structs */ - binder_uintptr_t offsets; - } ptr; - __u8 buf[8]; - } data; -}; - -struct binder_ptr_cookie { - binder_uintptr_t ptr; - binder_uintptr_t cookie; -}; - -struct binder_handle_cookie { - __u32 handle; - binder_uintptr_t cookie; -} __packed; - -struct binder_pri_desc { - __s32 priority; - __u32 desc; -}; - -struct binder_pri_ptr_cookie { - __s32 priority; - binder_uintptr_t ptr; - binder_uintptr_t cookie; -}; - -enum binder_driver_return_protocol { - BR_ERROR = _IOR('r', 0, __s32), - /* - * int: error code - */ - - BR_OK = _IO('r', 1), - /* No parameters! */ - - BR_TRANSACTION = _IOR('r', 2, struct binder_transaction_data), - BR_REPLY = _IOR('r', 3, struct binder_transaction_data), - /* - * binder_transaction_data: the received command. - */ - - BR_ACQUIRE_RESULT = _IOR('r', 4, __s32), - /* - * not currently supported - * int: 0 if the last bcATTEMPT_ACQUIRE was not successful. - * Else the remote object has acquired a primary reference. - */ - - BR_DEAD_REPLY = _IO('r', 5), - /* - * The target of the last transaction (either a bcTRANSACTION or - * a bcATTEMPT_ACQUIRE) is no longer with us. No parameters. - */ - - BR_TRANSACTION_COMPLETE = _IO('r', 6), - /* - * No parameters... always refers to the last transaction requested - * (including replies). Note that this will be sent even for - * asynchronous transactions. - */ - - BR_INCREFS = _IOR('r', 7, struct binder_ptr_cookie), - BR_ACQUIRE = _IOR('r', 8, struct binder_ptr_cookie), - BR_RELEASE = _IOR('r', 9, struct binder_ptr_cookie), - BR_DECREFS = _IOR('r', 10, struct binder_ptr_cookie), - /* - * void *: ptr to binder - * void *: cookie for binder - */ - - BR_ATTEMPT_ACQUIRE = _IOR('r', 11, struct binder_pri_ptr_cookie), - /* - * not currently supported - * int: priority - * void *: ptr to binder - * void *: cookie for binder - */ - - BR_NOOP = _IO('r', 12), - /* - * No parameters. Do nothing and examine the next command. It exists - * primarily so that we can replace it with a BR_SPAWN_LOOPER command. - */ - - BR_SPAWN_LOOPER = _IO('r', 13), - /* - * No parameters. The driver has determined that a process has no - * threads waiting to service incoming transactions. When a process - * receives this command, it must spawn a new service thread and - * register it via bcENTER_LOOPER. - */ - - BR_FINISHED = _IO('r', 14), - /* - * not currently supported - * stop threadpool thread - */ - - BR_DEAD_BINDER = _IOR('r', 15, binder_uintptr_t), - /* - * void *: cookie - */ - BR_CLEAR_DEATH_NOTIFICATION_DONE = _IOR('r', 16, binder_uintptr_t), - /* - * void *: cookie - */ - - BR_FAILED_REPLY = _IO('r', 17), - /* - * The the last transaction (either a bcTRANSACTION or - * a bcATTEMPT_ACQUIRE) failed (e.g. out of memory). No parameters. - */ -}; - -enum binder_driver_command_protocol { - BC_TRANSACTION = _IOW('c', 0, struct binder_transaction_data), - BC_REPLY = _IOW('c', 1, struct binder_transaction_data), - /* - * binder_transaction_data: the sent command. - */ - - BC_ACQUIRE_RESULT = _IOW('c', 2, __s32), - /* - * not currently supported - * int: 0 if the last BR_ATTEMPT_ACQUIRE was not successful. - * Else you have acquired a primary reference on the object. - */ - - BC_FREE_BUFFER = _IOW('c', 3, binder_uintptr_t), - /* - * void *: ptr to transaction data received on a read - */ - - BC_INCREFS = _IOW('c', 4, __u32), - BC_ACQUIRE = _IOW('c', 5, __u32), - BC_RELEASE = _IOW('c', 6, __u32), - BC_DECREFS = _IOW('c', 7, __u32), - /* - * int: descriptor - */ - - BC_INCREFS_DONE = _IOW('c', 8, struct binder_ptr_cookie), - BC_ACQUIRE_DONE = _IOW('c', 9, struct binder_ptr_cookie), - /* - * void *: ptr to binder - * void *: cookie for binder - */ - - BC_ATTEMPT_ACQUIRE = _IOW('c', 10, struct binder_pri_desc), - /* - * not currently supported - * int: priority - * int: descriptor - */ - - BC_REGISTER_LOOPER = _IO('c', 11), - /* - * No parameters. - * Register a spawned looper thread with the device. - */ - - BC_ENTER_LOOPER = _IO('c', 12), - BC_EXIT_LOOPER = _IO('c', 13), - /* - * No parameters. - * These two commands are sent as an application-level thread - * enters and exits the binder loop, respectively. They are - * used so the binder can have an accurate count of the number - * of looping threads it has available. - */ - - BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, - struct binder_handle_cookie), - /* - * int: handle - * void *: cookie - */ - - BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, - struct binder_handle_cookie), - /* - * int: handle - * void *: cookie - */ - - BC_DEAD_BINDER_DONE = _IOW('c', 16, binder_uintptr_t), - /* - * void *: cookie - */ -}; - -#endif /* _UAPI_LINUX_BINDER_H */ - |