3566 lines
99 KiB
C
3566 lines
99 KiB
C
/* binder.c
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*
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* Android IPC Subsystem
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*
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* Copyright (C) 2007-2008 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <asm/cacheflush.h>
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#include <linux/fdtable.h>
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#include <linux/file.h>
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#include <linux/freezer.h>
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#include <linux/fs.h>
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#include <linux/list.h>
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#include <linux/miscdevice.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/nsproxy.h>
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#include <linux/poll.h>
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#include <linux/debugfs.h>
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#include <linux/rbtree.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/slab.h>
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#include <linux/pid_namespace.h>
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#include "binder.h"
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#include "binder_trace.h"
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static DEFINE_MUTEX(binder_main_lock);
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static DEFINE_MUTEX(binder_deferred_lock);
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static DEFINE_MUTEX(binder_mmap_lock);
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static HLIST_HEAD(binder_procs);
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static HLIST_HEAD(binder_deferred_list);
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static HLIST_HEAD(binder_dead_nodes);
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static struct dentry *binder_debugfs_dir_entry_root;
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static struct dentry *binder_debugfs_dir_entry_proc;
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static struct binder_node *binder_context_mgr_node;
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static kuid_t binder_context_mgr_uid = INVALID_UID;
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static int binder_last_id;
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static struct workqueue_struct *binder_deferred_workqueue;
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#define BINDER_DEBUG_ENTRY(name) \
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static int binder_##name##_open(struct inode *inode, struct file *file) \
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{ \
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return single_open(file, binder_##name##_show, inode->i_private); \
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} \
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\
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static const struct file_operations binder_##name##_fops = { \
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.owner = THIS_MODULE, \
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.open = binder_##name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}
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static int binder_proc_show(struct seq_file *m, void *unused);
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BINDER_DEBUG_ENTRY(proc);
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/* This is only defined in include/asm-arm/sizes.h */
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#ifndef SZ_1K
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#define SZ_1K 0x400
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#endif
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#ifndef SZ_4M
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#define SZ_4M 0x400000
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#endif
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#define FORBIDDEN_MMAP_FLAGS (VM_WRITE)
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#define BINDER_SMALL_BUF_SIZE (PAGE_SIZE * 64)
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enum {
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BINDER_DEBUG_USER_ERROR = 1U << 0,
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BINDER_DEBUG_FAILED_TRANSACTION = 1U << 1,
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BINDER_DEBUG_DEAD_TRANSACTION = 1U << 2,
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BINDER_DEBUG_OPEN_CLOSE = 1U << 3,
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BINDER_DEBUG_DEAD_BINDER = 1U << 4,
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BINDER_DEBUG_DEATH_NOTIFICATION = 1U << 5,
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BINDER_DEBUG_READ_WRITE = 1U << 6,
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BINDER_DEBUG_USER_REFS = 1U << 7,
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BINDER_DEBUG_THREADS = 1U << 8,
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BINDER_DEBUG_TRANSACTION = 1U << 9,
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BINDER_DEBUG_TRANSACTION_COMPLETE = 1U << 10,
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BINDER_DEBUG_FREE_BUFFER = 1U << 11,
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BINDER_DEBUG_INTERNAL_REFS = 1U << 12,
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BINDER_DEBUG_BUFFER_ALLOC = 1U << 13,
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BINDER_DEBUG_PRIORITY_CAP = 1U << 14,
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BINDER_DEBUG_BUFFER_ALLOC_ASYNC = 1U << 15,
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};
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static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
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BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
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module_param_named(debug_mask, binder_debug_mask, uint, S_IWUSR | S_IRUGO);
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static bool binder_debug_no_lock;
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module_param_named(proc_no_lock, binder_debug_no_lock, bool, S_IWUSR | S_IRUGO);
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static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
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static int binder_stop_on_user_error;
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static int binder_set_stop_on_user_error(const char *val,
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struct kernel_param *kp)
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{
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int ret;
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ret = param_set_int(val, kp);
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if (binder_stop_on_user_error < 2)
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wake_up(&binder_user_error_wait);
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return ret;
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}
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module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
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param_get_int, &binder_stop_on_user_error, S_IWUSR | S_IRUGO);
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#define binder_debug(mask, x...) \
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do { \
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if (binder_debug_mask & mask) \
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pr_info(x); \
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} while (0)
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#define binder_user_error(x...) \
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do { \
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if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) \
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pr_info(x); \
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if (binder_stop_on_user_error) \
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binder_stop_on_user_error = 2; \
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} while (0)
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enum binder_stat_types {
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BINDER_STAT_PROC,
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BINDER_STAT_THREAD,
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BINDER_STAT_NODE,
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BINDER_STAT_REF,
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BINDER_STAT_DEATH,
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BINDER_STAT_TRANSACTION,
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BINDER_STAT_TRANSACTION_COMPLETE,
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BINDER_STAT_COUNT
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};
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struct binder_stats {
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int br[_IOC_NR(BR_FAILED_REPLY) + 1];
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int bc[_IOC_NR(BC_DEAD_BINDER_DONE) + 1];
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int obj_created[BINDER_STAT_COUNT];
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int obj_deleted[BINDER_STAT_COUNT];
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};
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static struct binder_stats binder_stats;
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static inline void binder_stats_deleted(enum binder_stat_types type)
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{
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binder_stats.obj_deleted[type]++;
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}
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static inline void binder_stats_created(enum binder_stat_types type)
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{
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binder_stats.obj_created[type]++;
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}
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struct binder_transaction_log_entry {
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int debug_id;
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int call_type;
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int from_proc;
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int from_thread;
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int target_handle;
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int to_proc;
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int to_thread;
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int to_node;
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int data_size;
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int offsets_size;
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};
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struct binder_transaction_log {
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int next;
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int full;
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struct binder_transaction_log_entry entry[32];
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};
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static struct binder_transaction_log binder_transaction_log;
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static struct binder_transaction_log binder_transaction_log_failed;
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static struct binder_transaction_log_entry *binder_transaction_log_add(
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struct binder_transaction_log *log)
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{
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struct binder_transaction_log_entry *e;
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e = &log->entry[log->next];
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memset(e, 0, sizeof(*e));
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log->next++;
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if (log->next == ARRAY_SIZE(log->entry)) {
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log->next = 0;
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log->full = 1;
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}
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return e;
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}
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struct binder_work {
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struct list_head entry;
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enum {
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BINDER_WORK_TRANSACTION = 1,
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BINDER_WORK_TRANSACTION_COMPLETE,
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BINDER_WORK_NODE,
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BINDER_WORK_DEAD_BINDER,
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BINDER_WORK_DEAD_BINDER_AND_CLEAR,
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BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
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} type;
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};
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struct binder_node {
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int debug_id;
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struct binder_work work;
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union {
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struct rb_node rb_node;
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struct hlist_node dead_node;
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};
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struct binder_proc *proc;
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struct hlist_head refs;
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int internal_strong_refs;
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int local_weak_refs;
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int local_strong_refs;
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void __user *ptr;
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void __user *cookie;
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unsigned has_strong_ref:1;
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unsigned pending_strong_ref:1;
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unsigned has_weak_ref:1;
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unsigned pending_weak_ref:1;
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unsigned has_async_transaction:1;
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unsigned accept_fds:1;
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unsigned min_priority:8;
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struct list_head async_todo;
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};
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struct binder_ref_death {
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struct binder_work work;
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void __user *cookie;
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};
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struct binder_ref {
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/* Lookups needed: */
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/* node + proc => ref (transaction) */
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/* desc + proc => ref (transaction, inc/dec ref) */
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/* node => refs + procs (proc exit) */
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int debug_id;
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struct rb_node rb_node_desc;
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struct rb_node rb_node_node;
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struct hlist_node node_entry;
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struct binder_proc *proc;
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struct binder_node *node;
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uint32_t desc;
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int strong;
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int weak;
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struct binder_ref_death *death;
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};
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struct binder_buffer {
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struct list_head entry; /* free and allocated entries by address */
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struct rb_node rb_node; /* free entry by size or allocated entry */
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/* by address */
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unsigned free:1;
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unsigned allow_user_free:1;
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unsigned async_transaction:1;
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unsigned debug_id:29;
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struct binder_transaction *transaction;
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struct binder_node *target_node;
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size_t data_size;
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size_t offsets_size;
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uint8_t data[0];
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};
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enum binder_deferred_state {
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BINDER_DEFERRED_PUT_FILES = 0x01,
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BINDER_DEFERRED_FLUSH = 0x02,
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BINDER_DEFERRED_RELEASE = 0x04,
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};
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struct binder_proc {
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struct hlist_node proc_node;
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struct rb_root threads;
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struct rb_root nodes;
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struct rb_root refs_by_desc;
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struct rb_root refs_by_node;
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int pid;
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struct vm_area_struct *vma;
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struct mm_struct *vma_vm_mm;
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struct task_struct *tsk;
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struct files_struct *files;
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struct hlist_node deferred_work_node;
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int deferred_work;
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void *buffer;
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ptrdiff_t user_buffer_offset;
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struct list_head buffers;
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struct rb_root free_buffers;
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struct rb_root allocated_buffers;
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size_t free_async_space;
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struct page **pages;
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size_t buffer_size;
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uint32_t buffer_free;
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struct list_head todo;
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wait_queue_head_t wait;
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struct binder_stats stats;
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struct list_head delivered_death;
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int max_threads;
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int requested_threads;
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int requested_threads_started;
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int ready_threads;
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long default_priority;
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struct dentry *debugfs_entry;
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};
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enum {
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BINDER_LOOPER_STATE_REGISTERED = 0x01,
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BINDER_LOOPER_STATE_ENTERED = 0x02,
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BINDER_LOOPER_STATE_EXITED = 0x04,
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BINDER_LOOPER_STATE_INVALID = 0x08,
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BINDER_LOOPER_STATE_WAITING = 0x10,
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BINDER_LOOPER_STATE_NEED_RETURN = 0x20
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};
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struct binder_thread {
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struct binder_proc *proc;
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struct rb_node rb_node;
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int pid;
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int looper;
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struct binder_transaction *transaction_stack;
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struct list_head todo;
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uint32_t return_error; /* Write failed, return error code in read buf */
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uint32_t return_error2; /* Write failed, return error code in read */
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/* buffer. Used when sending a reply to a dead process that */
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/* we are also waiting on */
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wait_queue_head_t wait;
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struct binder_stats stats;
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};
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struct binder_transaction {
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int debug_id;
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struct binder_work work;
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struct binder_thread *from;
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struct binder_transaction *from_parent;
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struct binder_proc *to_proc;
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struct binder_thread *to_thread;
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struct binder_transaction *to_parent;
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unsigned need_reply:1;
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/* unsigned is_dead:1; */ /* not used at the moment */
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struct binder_buffer *buffer;
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unsigned int code;
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unsigned int flags;
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long priority;
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long saved_priority;
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kuid_t sender_euid;
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};
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static void
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binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
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static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
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{
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struct files_struct *files = proc->files;
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unsigned long rlim_cur;
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unsigned long irqs;
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if (files == NULL)
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return -ESRCH;
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if (!lock_task_sighand(proc->tsk, &irqs))
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return -EMFILE;
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rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
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unlock_task_sighand(proc->tsk, &irqs);
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return __alloc_fd(files, 0, rlim_cur, flags);
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}
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/*
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* copied from fd_install
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*/
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static void task_fd_install(
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struct binder_proc *proc, unsigned int fd, struct file *file)
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{
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if (proc->files)
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__fd_install(proc->files, fd, file);
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}
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/*
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* copied from sys_close
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*/
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static long task_close_fd(struct binder_proc *proc, unsigned int fd)
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{
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int retval;
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if (proc->files == NULL)
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return -ESRCH;
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retval = __close_fd(proc->files, fd);
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/* can't restart close syscall because file table entry was cleared */
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if (unlikely(retval == -ERESTARTSYS ||
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retval == -ERESTARTNOINTR ||
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retval == -ERESTARTNOHAND ||
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retval == -ERESTART_RESTARTBLOCK))
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retval = -EINTR;
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return retval;
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}
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static inline void binder_lock(const char *tag)
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{
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trace_binder_lock(tag);
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mutex_lock(&binder_main_lock);
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trace_binder_locked(tag);
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}
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static inline void binder_unlock(const char *tag)
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{
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trace_binder_unlock(tag);
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mutex_unlock(&binder_main_lock);
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}
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static void binder_set_nice(long nice)
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{
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long min_nice;
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if (can_nice(current, nice)) {
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set_user_nice(current, nice);
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return;
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}
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min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur;
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binder_debug(BINDER_DEBUG_PRIORITY_CAP,
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"%d: nice value %ld not allowed use %ld instead\n",
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current->pid, nice, min_nice);
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set_user_nice(current, min_nice);
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if (min_nice < 20)
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return;
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binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
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}
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static size_t binder_buffer_size(struct binder_proc *proc,
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struct binder_buffer *buffer)
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{
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if (list_is_last(&buffer->entry, &proc->buffers))
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return proc->buffer + proc->buffer_size - (void *)buffer->data;
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else
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return (size_t)list_entry(buffer->entry.next,
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struct binder_buffer, entry) - (size_t)buffer->data;
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}
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static void binder_insert_free_buffer(struct binder_proc *proc,
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struct binder_buffer *new_buffer)
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{
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struct rb_node **p = &proc->free_buffers.rb_node;
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struct rb_node *parent = NULL;
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struct binder_buffer *buffer;
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size_t buffer_size;
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size_t new_buffer_size;
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BUG_ON(!new_buffer->free);
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new_buffer_size = binder_buffer_size(proc, new_buffer);
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binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
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"%d: add free buffer, size %zd, at %p\n",
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proc->pid, new_buffer_size, new_buffer);
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while (*p) {
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parent = *p;
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buffer = rb_entry(parent, struct binder_buffer, rb_node);
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BUG_ON(!buffer->free);
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buffer_size = binder_buffer_size(proc, buffer);
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if (new_buffer_size < buffer_size)
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p = &parent->rb_left;
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else
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p = &parent->rb_right;
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}
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rb_link_node(&new_buffer->rb_node, parent, p);
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rb_insert_color(&new_buffer->rb_node, &proc->free_buffers);
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}
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static void binder_insert_allocated_buffer(struct binder_proc *proc,
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struct binder_buffer *new_buffer)
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{
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struct rb_node **p = &proc->allocated_buffers.rb_node;
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struct rb_node *parent = NULL;
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struct binder_buffer *buffer;
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BUG_ON(new_buffer->free);
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while (*p) {
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parent = *p;
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buffer = rb_entry(parent, struct binder_buffer, rb_node);
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BUG_ON(buffer->free);
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if (new_buffer < buffer)
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p = &parent->rb_left;
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else if (new_buffer > buffer)
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p = &parent->rb_right;
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else
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BUG();
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}
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rb_link_node(&new_buffer->rb_node, parent, p);
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rb_insert_color(&new_buffer->rb_node, &proc->allocated_buffers);
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}
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static struct binder_buffer *binder_buffer_lookup(struct binder_proc *proc,
|
|
void __user *user_ptr)
|
|
{
|
|
struct rb_node *n = proc->allocated_buffers.rb_node;
|
|
struct binder_buffer *buffer;
|
|
struct binder_buffer *kern_ptr;
|
|
|
|
kern_ptr = user_ptr - proc->user_buffer_offset
|
|
- offsetof(struct binder_buffer, data);
|
|
|
|
while (n) {
|
|
buffer = rb_entry(n, struct binder_buffer, rb_node);
|
|
BUG_ON(buffer->free);
|
|
|
|
if (kern_ptr < buffer)
|
|
n = n->rb_left;
|
|
else if (kern_ptr > buffer)
|
|
n = n->rb_right;
|
|
else
|
|
return buffer;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int binder_update_page_range(struct binder_proc *proc, int allocate,
|
|
void *start, void *end,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
void *page_addr;
|
|
unsigned long user_page_addr;
|
|
struct vm_struct tmp_area;
|
|
struct page **page;
|
|
struct mm_struct *mm;
|
|
|
|
binder_debug(BINDER_DEBUG_BUFFER_ALLOC,
|
|
"%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;
|
|
struct page **page_array_ptr;
|
|
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? */;
|
|
page_array_ptr = page;
|
|
ret = map_vm_area(&tmp_area, PAGE_KERNEL, &page_array_ptr);
|
|
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,
|
|
void __user *ptr)
|
|
{
|
|
struct rb_node *n = proc->nodes.rb_node;
|
|
struct binder_node *node;
|
|
|
|
while (n) {
|
|
node = rb_entry(n, struct binder_node, rb_node);
|
|
|
|
if (ptr < node->ptr)
|
|
n = n->rb_left;
|
|
else if (ptr > node->ptr)
|
|
n = n->rb_right;
|
|
else
|
|
return node;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct binder_node *binder_new_node(struct binder_proc *proc,
|
|
void __user *ptr,
|
|
void __user *cookie)
|
|
{
|
|
struct rb_node **p = &proc->nodes.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct binder_node *node;
|
|
|
|
while (*p) {
|
|
parent = *p;
|
|
node = rb_entry(parent, struct binder_node, rb_node);
|
|
|
|
if (ptr < node->ptr)
|
|
p = &(*p)->rb_left;
|
|
else if (ptr > node->ptr)
|
|
p = &(*p)->rb_right;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
node = kzalloc(sizeof(*node), GFP_KERNEL);
|
|
if (node == NULL)
|
|
return NULL;
|
|
binder_stats_created(BINDER_STAT_NODE);
|
|
rb_link_node(&node->rb_node, parent, p);
|
|
rb_insert_color(&node->rb_node, &proc->nodes);
|
|
node->debug_id = ++binder_last_id;
|
|
node->proc = proc;
|
|
node->ptr = ptr;
|
|
node->cookie = cookie;
|
|
node->work.type = BINDER_WORK_NODE;
|
|
INIT_LIST_HEAD(&node->work.entry);
|
|
INIT_LIST_HEAD(&node->async_todo);
|
|
binder_debug(BINDER_DEBUG_INTERNAL_REFS,
|
|
"%d:%d node %d u%p c%p created\n",
|
|
proc->pid, current->pid, node->debug_id,
|
|
node->ptr, node->cookie);
|
|
return node;
|
|
}
|
|
|
|
static int binder_inc_node(struct binder_node *node, int strong, int internal,
|
|
struct list_head *target_list)
|
|
{
|
|
if (strong) {
|
|
if (internal) {
|
|
if (target_list == NULL &&
|
|
node->internal_strong_refs == 0 &&
|
|
!(node == binder_context_mgr_node &&
|
|
node->has_strong_ref)) {
|
|
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;
|
|
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;
|
|
} else {
|
|
struct binder_transaction *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,
|
|
size_t *failed_at)
|
|
{
|
|
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 = (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 %zd, size %zd\n",
|
|
debug_id, *offp, buffer->data_size);
|
|
continue;
|
|
}
|
|
fp = (struct flat_binder_object *)(buffer->data + *offp);
|
|
switch (fp->type) {
|
|
case BINDER_TYPE_BINDER:
|
|
case BINDER_TYPE_WEAK_BINDER: {
|
|
struct binder_node *node = binder_get_node(proc, fp->binder);
|
|
if (node == NULL) {
|
|
pr_err("transaction release %d bad node %p\n",
|
|
debug_id, fp->binder);
|
|
break;
|
|
}
|
|
binder_debug(BINDER_DEBUG_TRANSACTION,
|
|
" node %d u%p\n",
|
|
node->debug_id, node->ptr);
|
|
binder_dec_node(node, fp->type == BINDER_TYPE_BINDER, 0);
|
|
} break;
|
|
case BINDER_TYPE_HANDLE:
|
|
case BINDER_TYPE_WEAK_HANDLE: {
|
|
struct binder_ref *ref = binder_get_ref(proc, fp->handle);
|
|
if (ref == NULL) {
|
|
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;
|
|
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 %p-%p size %zd-%zd\n",
|
|
proc->pid, thread->pid, t->debug_id,
|
|
target_proc->pid, target_thread->pid,
|
|
tr->data.ptr.buffer, tr->data.ptr.offsets,
|
|
tr->data_size, tr->offsets_size);
|
|
else
|
|
binder_debug(BINDER_DEBUG_TRANSACTION,
|
|
"%d:%d BC_TRANSACTION %d -> %d - node %d, data %p-%p size %zd-%zd\n",
|
|
proc->pid, thread->pid, t->debug_id,
|
|
target_proc->pid, target_node->debug_id,
|
|
tr->data.ptr.buffer, tr->data.ptr.offsets,
|
|
tr->data_size, tr->offsets_size);
|
|
|
|
if (!reply && !(tr->flags & TF_ONE_WAY))
|
|
t->from = thread;
|
|
else
|
|
t->from = NULL;
|
|
t->sender_euid = proc->tsk->cred->euid;
|
|
t->to_proc = target_proc;
|
|
t->to_thread = target_thread;
|
|
t->code = tr->code;
|
|
t->flags = tr->flags;
|
|
t->priority = task_nice(current);
|
|
|
|
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 = (size_t *)(t->buffer->data + ALIGN(tr->data_size, sizeof(void *)));
|
|
|
|
if (copy_from_user(t->buffer->data, tr->data.ptr.buffer, tr->data_size)) {
|
|
binder_user_error("%d:%d got transaction with invalid data ptr\n",
|
|
proc->pid, thread->pid);
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_copy_data_failed;
|
|
}
|
|
if (copy_from_user(offp, tr->data.ptr.offsets, tr->offsets_size)) {
|
|
binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
|
|
proc->pid, thread->pid);
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_copy_data_failed;
|
|
}
|
|
if (!IS_ALIGNED(tr->offsets_size, sizeof(size_t))) {
|
|
binder_user_error("%d:%d got transaction with invalid offsets size, %zd\n",
|
|
proc->pid, thread->pid, tr->offsets_size);
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_bad_offset;
|
|
}
|
|
off_end = (void *)offp + tr->offsets_size;
|
|
for (; offp < off_end; offp++) {
|
|
struct flat_binder_object *fp;
|
|
if (*offp > t->buffer->data_size - sizeof(*fp) ||
|
|
t->buffer->data_size < sizeof(*fp) ||
|
|
!IS_ALIGNED(*offp, sizeof(u32))) {
|
|
binder_user_error("%d:%d got transaction with invalid offset, %zd\n",
|
|
proc->pid, thread->pid, *offp);
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_bad_offset;
|
|
}
|
|
fp = (struct flat_binder_object *)(t->buffer->data + *offp);
|
|
switch (fp->type) {
|
|
case BINDER_TYPE_BINDER:
|
|
case BINDER_TYPE_WEAK_BINDER: {
|
|
struct binder_ref *ref;
|
|
struct binder_node *node = binder_get_node(proc, fp->binder);
|
|
if (node == NULL) {
|
|
node = binder_new_node(proc, fp->binder, fp->cookie);
|
|
if (node == NULL) {
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_binder_new_node_failed;
|
|
}
|
|
node->min_priority = fp->flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
|
|
node->accept_fds = !!(fp->flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
|
|
}
|
|
if (fp->cookie != node->cookie) {
|
|
binder_user_error("%d:%d sending u%p node %d, cookie mismatch %p != %p\n",
|
|
proc->pid, thread->pid,
|
|
fp->binder, node->debug_id,
|
|
fp->cookie, node->cookie);
|
|
goto err_binder_get_ref_for_node_failed;
|
|
}
|
|
ref = binder_get_ref_for_node(target_proc, node);
|
|
if (ref == NULL) {
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_binder_get_ref_for_node_failed;
|
|
}
|
|
if (fp->type == BINDER_TYPE_BINDER)
|
|
fp->type = BINDER_TYPE_HANDLE;
|
|
else
|
|
fp->type = BINDER_TYPE_WEAK_HANDLE;
|
|
fp->handle = ref->desc;
|
|
binder_inc_ref(ref, fp->type == BINDER_TYPE_HANDLE,
|
|
&thread->todo);
|
|
|
|
trace_binder_transaction_node_to_ref(t, node, ref);
|
|
binder_debug(BINDER_DEBUG_TRANSACTION,
|
|
" node %d u%p -> ref %d desc %d\n",
|
|
node->debug_id, node->ptr, ref->debug_id,
|
|
ref->desc);
|
|
} break;
|
|
case BINDER_TYPE_HANDLE:
|
|
case BINDER_TYPE_WEAK_HANDLE: {
|
|
struct binder_ref *ref = binder_get_ref(proc, fp->handle);
|
|
if (ref == NULL) {
|
|
binder_user_error("%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%p\n",
|
|
ref->debug_id, ref->desc, ref->node->debug_id,
|
|
ref->node->ptr);
|
|
} else {
|
|
struct binder_ref *new_ref;
|
|
new_ref = binder_get_ref_for_node(target_proc, ref->node);
|
|
if (new_ref == NULL) {
|
|
return_error = BR_FAILED_REPLY;
|
|
goto err_binder_get_ref_for_node_failed;
|
|
}
|
|
fp->handle = new_ref->desc;
|
|
binder_inc_ref(new_ref, fp->type == BINDER_TYPE_HANDLE, NULL);
|
|
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 %zd-%zd\n",
|
|
proc->pid, thread->pid, return_error,
|
|
tr->data_size, tr->offsets_size);
|
|
|
|
{
|
|
struct binder_transaction_log_entry *fe;
|
|
fe = binder_transaction_log_add(&binder_transaction_log_failed);
|
|
*fe = *e;
|
|
}
|
|
|
|
BUG_ON(thread->return_error != BR_OK);
|
|
if (in_reply_to) {
|
|
thread->return_error = BR_TRANSACTION_COMPLETE;
|
|
binder_send_failed_reply(in_reply_to, return_error);
|
|
} else
|
|
thread->return_error = return_error;
|
|
}
|
|
|
|
static int binder_thread_write(struct binder_proc *proc,
|
|
struct binder_thread *thread,
|
|
void __user *buffer, size_t size, size_t *consumed)
|
|
{
|
|
uint32_t cmd;
|
|
void __user *ptr = buffer + *consumed;
|
|
void __user *end = buffer + size;
|
|
|
|
while (ptr < end && thread->return_error == BR_OK) {
|
|
if (get_user(cmd, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
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: {
|
|
void __user *node_ptr;
|
|
void __user *cookie;
|
|
struct binder_node *node;
|
|
|
|
if (get_user(node_ptr, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
if (get_user(cookie, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
node = binder_get_node(proc, node_ptr);
|
|
if (node == NULL) {
|
|
binder_user_error("%d:%d %s u%p no match\n",
|
|
proc->pid, thread->pid,
|
|
cmd == BC_INCREFS_DONE ?
|
|
"BC_INCREFS_DONE" :
|
|
"BC_ACQUIRE_DONE",
|
|
node_ptr);
|
|
break;
|
|
}
|
|
if (cookie != node->cookie) {
|
|
binder_user_error("%d:%d %s u%p node %d cookie mismatch %p != %p\n",
|
|
proc->pid, thread->pid,
|
|
cmd == BC_INCREFS_DONE ?
|
|
"BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
|
|
node_ptr, node->debug_id,
|
|
cookie, node->cookie);
|
|
break;
|
|
}
|
|
if (cmd == BC_ACQUIRE_DONE) {
|
|
if (node->pending_strong_ref == 0) {
|
|
binder_user_error("%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: {
|
|
void __user *data_ptr;
|
|
struct binder_buffer *buffer;
|
|
|
|
if (get_user(data_ptr, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
|
|
buffer = binder_buffer_lookup(proc, data_ptr);
|
|
if (buffer == NULL) {
|
|
binder_user_error("%d:%d BC_FREE_BUFFER u%p no match\n",
|
|
proc->pid, thread->pid, data_ptr);
|
|
break;
|
|
}
|
|
if (!buffer->allow_user_free) {
|
|
binder_user_error("%d:%d BC_FREE_BUFFER u%p matched unreturned buffer\n",
|
|
proc->pid, thread->pid, data_ptr);
|
|
break;
|
|
}
|
|
binder_debug(BINDER_DEBUG_FREE_BUFFER,
|
|
"%d:%d BC_FREE_BUFFER u%p found buffer %d for %s transaction\n",
|
|
proc->pid, thread->pid, data_ptr, buffer->debug_id,
|
|
buffer->transaction ? "active" : "finished");
|
|
|
|
if (buffer->transaction) {
|
|
buffer->transaction->buffer = NULL;
|
|
buffer->transaction = NULL;
|
|
}
|
|
if (buffer->async_transaction && buffer->target_node) {
|
|
BUG_ON(!buffer->target_node->has_async_transaction);
|
|
if (list_empty(&buffer->target_node->async_todo))
|
|
buffer->target_node->has_async_transaction = 0;
|
|
else
|
|
list_move_tail(buffer->target_node->async_todo.next, &thread->todo);
|
|
}
|
|
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;
|
|
void __user *cookie;
|
|
struct binder_ref *ref;
|
|
struct binder_ref_death *death;
|
|
|
|
if (get_user(target, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
if (get_user(cookie, (void __user * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
ref = binder_get_ref(proc, target);
|
|
if (ref == NULL) {
|
|
binder_user_error("%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 %p ref %d desc %d s %d w %d for node %d\n",
|
|
proc->pid, thread->pid,
|
|
cmd == BC_REQUEST_DEATH_NOTIFICATION ?
|
|
"BC_REQUEST_DEATH_NOTIFICATION" :
|
|
"BC_CLEAR_DEATH_NOTIFICATION",
|
|
cookie, ref->debug_id, ref->desc,
|
|
ref->strong, ref->weak, ref->node->debug_id);
|
|
|
|
if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
|
|
if (ref->death) {
|
|
binder_user_error("%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 %p != %p\n",
|
|
proc->pid, thread->pid,
|
|
death->cookie, cookie);
|
|
break;
|
|
}
|
|
ref->death = NULL;
|
|
if (list_empty(&death->work.entry)) {
|
|
death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
|
|
if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
|
|
list_add_tail(&death->work.entry, &thread->todo);
|
|
} else {
|
|
list_add_tail(&death->work.entry, &proc->todo);
|
|
wake_up_interruptible(&proc->wait);
|
|
}
|
|
} else {
|
|
BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
|
|
death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
|
|
}
|
|
}
|
|
} break;
|
|
case BC_DEAD_BINDER_DONE: {
|
|
struct binder_work *w;
|
|
void __user *cookie;
|
|
struct binder_ref_death *death = NULL;
|
|
if (get_user(cookie, (void __user * __user *)ptr))
|
|
return -EFAULT;
|
|
|
|
ptr += sizeof(void *);
|
|
list_for_each_entry(w, &proc->delivered_death, entry) {
|
|
struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);
|
|
if (tmp_death->cookie == cookie) {
|
|
death = tmp_death;
|
|
break;
|
|
}
|
|
}
|
|
binder_debug(BINDER_DEBUG_DEAD_BINDER,
|
|
"%d:%d BC_DEAD_BINDER_DONE %p found %p\n",
|
|
proc->pid, thread->pid, cookie, death);
|
|
if (death == NULL) {
|
|
binder_user_error("%d:%d BC_DEAD_BINDER_DONE %p not found\n",
|
|
proc->pid, thread->pid, cookie);
|
|
break;
|
|
}
|
|
|
|
list_del_init(&death->work.entry);
|
|
if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
|
|
death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
|
|
if (thread->looper & (BINDER_LOOPER_STATE_REGISTERED | BINDER_LOOPER_STATE_ENTERED)) {
|
|
list_add_tail(&death->work.entry, &thread->todo);
|
|
} else {
|
|
list_add_tail(&death->work.entry, &proc->todo);
|
|
wake_up_interruptible(&proc->wait);
|
|
}
|
|
}
|
|
} break;
|
|
|
|
default:
|
|
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,
|
|
void __user *buffer, size_t size,
|
|
size_t *consumed, int non_block)
|
|
{
|
|
void __user *ptr = buffer + *consumed;
|
|
void __user *end = buffer + size;
|
|
|
|
int ret = 0;
|
|
int wait_for_proc_work;
|
|
|
|
if (*consumed == 0) {
|
|
if (put_user(BR_NOOP, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
}
|
|
|
|
retry:
|
|
wait_for_proc_work = thread->transaction_stack == NULL &&
|
|
list_empty(&thread->todo);
|
|
|
|
if (thread->return_error != BR_OK && ptr < end) {
|
|
if (thread->return_error2 != BR_OK) {
|
|
if (put_user(thread->return_error2, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
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 {
|
|
if (ptr - buffer == 4 && !(thread->looper & BINDER_LOOPER_STATE_NEED_RETURN)) /* no data added */
|
|
goto retry;
|
|
break;
|
|
}
|
|
|
|
if (end - ptr < sizeof(tr) + 4)
|
|
break;
|
|
|
|
switch (w->type) {
|
|
case BINDER_WORK_TRANSACTION: {
|
|
t = container_of(w, struct binder_transaction, work);
|
|
} break;
|
|
case BINDER_WORK_TRANSACTION_COMPLETE: {
|
|
cmd = BR_TRANSACTION_COMPLETE;
|
|
if (put_user(cmd, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
|
|
binder_stat_br(proc, thread, cmd);
|
|
binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
|
|
"%d:%d BR_TRANSACTION_COMPLETE\n",
|
|
proc->pid, thread->pid);
|
|
|
|
list_del(&w->entry);
|
|
kfree(w);
|
|
binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
|
|
} break;
|
|
case BINDER_WORK_NODE: {
|
|
struct binder_node *node = container_of(w, struct binder_node, work);
|
|
uint32_t cmd = BR_NOOP;
|
|
const char *cmd_name;
|
|
int strong = node->internal_strong_refs || node->local_strong_refs;
|
|
int weak = !hlist_empty(&node->refs) || node->local_weak_refs || strong;
|
|
if (weak && !node->has_weak_ref) {
|
|
cmd = BR_INCREFS;
|
|
cmd_name = "BR_INCREFS";
|
|
node->has_weak_ref = 1;
|
|
node->pending_weak_ref = 1;
|
|
node->local_weak_refs++;
|
|
} else if (strong && !node->has_strong_ref) {
|
|
cmd = BR_ACQUIRE;
|
|
cmd_name = "BR_ACQUIRE";
|
|
node->has_strong_ref = 1;
|
|
node->pending_strong_ref = 1;
|
|
node->local_strong_refs++;
|
|
} else if (!strong && node->has_strong_ref) {
|
|
cmd = BR_RELEASE;
|
|
cmd_name = "BR_RELEASE";
|
|
node->has_strong_ref = 0;
|
|
} else if (!weak && node->has_weak_ref) {
|
|
cmd = BR_DECREFS;
|
|
cmd_name = "BR_DECREFS";
|
|
node->has_weak_ref = 0;
|
|
}
|
|
if (cmd != BR_NOOP) {
|
|
if (put_user(cmd, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
if (put_user(node->ptr, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
if (put_user(node->cookie, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
|
|
binder_stat_br(proc, thread, cmd);
|
|
binder_debug(BINDER_DEBUG_USER_REFS,
|
|
"%d:%d %s %d u%p c%p\n",
|
|
proc->pid, thread->pid, cmd_name, node->debug_id, node->ptr, node->cookie);
|
|
} else {
|
|
list_del_init(&w->entry);
|
|
if (!weak && !strong) {
|
|
binder_debug(BINDER_DEBUG_INTERNAL_REFS,
|
|
"%d:%d node %d u%p c%p deleted\n",
|
|
proc->pid, thread->pid, node->debug_id,
|
|
node->ptr, node->cookie);
|
|
rb_erase(&node->rb_node, &proc->nodes);
|
|
kfree(node);
|
|
binder_stats_deleted(BINDER_STAT_NODE);
|
|
} else {
|
|
binder_debug(BINDER_DEBUG_INTERNAL_REFS,
|
|
"%d:%d node %d u%p c%p state unchanged\n",
|
|
proc->pid, thread->pid, node->debug_id, node->ptr,
|
|
node->cookie);
|
|
}
|
|
}
|
|
} break;
|
|
case BINDER_WORK_DEAD_BINDER:
|
|
case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
|
|
case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
|
|
struct binder_ref_death *death;
|
|
uint32_t cmd;
|
|
|
|
death = container_of(w, struct binder_ref_death, work);
|
|
if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
|
|
cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
|
|
else
|
|
cmd = BR_DEAD_BINDER;
|
|
if (put_user(cmd, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
if (put_user(death->cookie, (void * __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(void *);
|
|
binder_stat_br(proc, thread, cmd);
|
|
binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
|
|
"%d:%d %s %p\n",
|
|
proc->pid, thread->pid,
|
|
cmd == BR_DEAD_BINDER ?
|
|
"BR_DEAD_BINDER" :
|
|
"BR_CLEAR_DEATH_NOTIFICATION_DONE",
|
|
death->cookie);
|
|
|
|
if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
|
|
list_del(&w->entry);
|
|
kfree(death);
|
|
binder_stats_deleted(BINDER_STAT_DEATH);
|
|
} else
|
|
list_move(&w->entry, &proc->delivered_death);
|
|
if (cmd == BR_DEAD_BINDER)
|
|
goto done; /* DEAD_BINDER notifications can cause transactions */
|
|
} break;
|
|
}
|
|
|
|
if (!t)
|
|
continue;
|
|
|
|
BUG_ON(t->buffer == NULL);
|
|
if (t->buffer->target_node) {
|
|
struct binder_node *target_node = t->buffer->target_node;
|
|
tr.target.ptr = target_node->ptr;
|
|
tr.cookie = target_node->cookie;
|
|
t->saved_priority = task_nice(current);
|
|
if (t->priority < target_node->min_priority &&
|
|
!(t->flags & TF_ONE_WAY))
|
|
binder_set_nice(t->priority);
|
|
else if (!(t->flags & TF_ONE_WAY) ||
|
|
t->saved_priority > target_node->min_priority)
|
|
binder_set_nice(target_node->min_priority);
|
|
cmd = BR_TRANSACTION;
|
|
} else {
|
|
tr.target.ptr = NULL;
|
|
tr.cookie = NULL;
|
|
cmd = BR_REPLY;
|
|
}
|
|
tr.code = t->code;
|
|
tr.flags = t->flags;
|
|
tr.sender_euid = 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 = (void *)t->buffer->data +
|
|
proc->user_buffer_offset;
|
|
tr.data.ptr.offsets = tr.data.ptr.buffer +
|
|
ALIGN(t->buffer->data_size,
|
|
sizeof(void *));
|
|
|
|
if (put_user(cmd, (uint32_t __user *)ptr))
|
|
return -EFAULT;
|
|
ptr += sizeof(uint32_t);
|
|
if (copy_to_user(ptr, &tr, sizeof(tr)))
|
|
return -EFAULT;
|
|
ptr += sizeof(tr);
|
|
|
|
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 %p-%p\n",
|
|
proc->pid, thread->pid,
|
|
(cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
|
|
"BR_REPLY",
|
|
t->debug_id, t->from ? t->from->proc->pid : 0,
|
|
t->from ? t->from->pid : 0, cmd,
|
|
t->buffer->data_size, t->buffer->offsets_size,
|
|
tr.data.ptr.buffer, tr.data.ptr.offsets);
|
|
|
|
list_del(&t->work.entry);
|
|
t->buffer->allow_user_free = 1;
|
|
if (cmd == BR_TRANSACTION && !(t->flags & TF_ONE_WAY)) {
|
|
t->to_parent = thread->transaction_stack;
|
|
t->to_thread = thread;
|
|
thread->transaction_stack = t;
|
|
} else {
|
|
t->buffer->transaction = NULL;
|
|
kfree(t);
|
|
binder_stats_deleted(BINDER_STAT_TRANSACTION);
|
|
}
|
|
break;
|
|
}
|
|
|
|
done:
|
|
|
|
*consumed = ptr - buffer;
|
|
if (proc->requested_threads + proc->ready_threads == 0 &&
|
|
proc->requested_threads_started < proc->max_threads &&
|
|
(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
|
|
BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
|
|
/*spawn a new thread if we leave this out */) {
|
|
proc->requested_threads++;
|
|
binder_debug(BINDER_DEBUG_THREADS,
|
|
"%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, %p\n",
|
|
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 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: {
|
|
struct binder_write_read bwr;
|
|
if (size != sizeof(struct binder_write_read)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
binder_debug(BINDER_DEBUG_READ_WRITE,
|
|
"%d:%d write %zd at %016lx, read %zd at %016lx\n",
|
|
proc->pid, thread->pid, bwr.write_size,
|
|
bwr.write_buffer, bwr.read_size, bwr.read_buffer);
|
|
|
|
if (bwr.write_size > 0) {
|
|
ret = binder_thread_write(proc, thread, (void __user *)bwr.write_buffer, bwr.write_size, &bwr.write_consumed);
|
|
trace_binder_write_done(ret);
|
|
if (ret < 0) {
|
|
bwr.read_consumed = 0;
|
|
if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
}
|
|
if (bwr.read_size > 0) {
|
|
ret = binder_thread_read(proc, thread, (void __user *)bwr.read_buffer, bwr.read_size, &bwr.read_consumed, filp->f_flags & O_NONBLOCK);
|
|
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 err;
|
|
}
|
|
}
|
|
binder_debug(BINDER_DEBUG_READ_WRITE,
|
|
"%d:%d wrote %zd of %zd, read return %zd of %zd\n",
|
|
proc->pid, thread->pid, bwr.write_consumed, bwr.write_size,
|
|
bwr.read_consumed, bwr.read_size);
|
|
if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
break;
|
|
}
|
|
case BINDER_SET_MAX_THREADS:
|
|
if (copy_from_user(&proc->max_threads, ubuf, sizeof(proc->max_threads))) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
break;
|
|
case BINDER_SET_CONTEXT_MGR:
|
|
if (binder_context_mgr_node != NULL) {
|
|
pr_err("BINDER_SET_CONTEXT_MGR already set\n");
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
if (uid_valid(binder_context_mgr_uid)) {
|
|
if (!uid_eq(binder_context_mgr_uid, current->cred->euid)) {
|
|
pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
|
|
from_kuid(&init_user_ns, current->cred->euid),
|
|
from_kuid(&init_user_ns, binder_context_mgr_uid));
|
|
ret = -EPERM;
|
|
goto err;
|
|
}
|
|
} else
|
|
binder_context_mgr_uid = current->cred->euid;
|
|
binder_context_mgr_node = binder_new_node(proc, NULL, NULL);
|
|
if (binder_context_mgr_node == NULL) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
binder_context_mgr_node->local_weak_refs++;
|
|
binder_context_mgr_node->local_strong_refs++;
|
|
binder_context_mgr_node->has_strong_ref = 1;
|
|
binder_context_mgr_node->has_weak_ref = 1;
|
|
break;
|
|
case BINDER_THREAD_EXIT:
|
|
binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
|
|
proc->pid, thread->pid);
|
|
binder_free_thread(proc, thread);
|
|
thread = NULL;
|
|
break;
|
|
case BINDER_VERSION:
|
|
if (size != sizeof(struct binder_version)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
if (put_user(BINDER_CURRENT_PROTOCOL_VERSION, &((struct binder_version *)ubuf)->protocol_version)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
ret = 0;
|
|
err:
|
|
if (thread)
|
|
thread->looper &= ~BINDER_LOOPER_STATE_NEED_RETURN;
|
|
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 struct vm_operations_struct binder_vm_ops = {
|
|
.open = binder_vma_open,
|
|
.close = binder_vma_close,
|
|
};
|
|
|
|
static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
|
|
{
|
|
int ret;
|
|
struct vm_struct *area;
|
|
struct binder_proc *proc = filp->private_data;
|
|
const char *failure_string;
|
|
struct binder_buffer *buffer;
|
|
|
|
if (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)
|
|
goto out;
|
|
|
|
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();
|
|
}
|
|
|
|
out:
|
|
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%p c%p\n",
|
|
prefix, node->debug_id, node->ptr, 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%p c%p hs %d hw %d ls %d lw %d is %d iw %d",
|
|
node->debug_id, node->ptr, node->cookie,
|
|
node->has_strong_ref, node->has_weak_ref,
|
|
node->local_strong_refs, node->local_weak_refs,
|
|
node->internal_strong_refs, count);
|
|
if (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,
|
|
.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");
|