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path: root/drivers/android/binder.c
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Diffstat (limited to 'drivers/android/binder.c')
-rw-r--r--drivers/android/binder.c105
1 files changed, 61 insertions, 44 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 38a59a630cd4..c0a491277aca 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -122,7 +122,7 @@ static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
module_param_named(debug_mask, binder_debug_mask, uint, 0644);
-static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
+char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
module_param_named(devices, binder_devices_param, charp, 0444);
static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
@@ -196,30 +196,8 @@ static inline void binder_stats_created(enum binder_stat_types type)
atomic_inc(&binder_stats.obj_created[type]);
}
-struct binder_transaction_log_entry {
- int debug_id;
- int debug_id_done;
- int call_type;
- int from_proc;
- int from_thread;
- int target_handle;
- int to_proc;
- int to_thread;
- int to_node;
- int data_size;
- int offsets_size;
- int return_error_line;
- uint32_t return_error;
- uint32_t return_error_param;
- const char *context_name;
-};
-struct binder_transaction_log {
- atomic_t cur;
- bool full;
- struct binder_transaction_log_entry entry[32];
-};
-static struct binder_transaction_log binder_transaction_log;
-static struct binder_transaction_log binder_transaction_log_failed;
+struct binder_transaction_log binder_transaction_log;
+struct binder_transaction_log binder_transaction_log_failed;
static struct binder_transaction_log_entry *binder_transaction_log_add(
struct binder_transaction_log *log)
@@ -480,6 +458,7 @@ enum binder_deferred_state {
* @inner_lock: can nest under outer_lock and/or node lock
* @outer_lock: no nesting under innor or node lock
* Lock order: 1) outer, 2) node, 3) inner
+ * @binderfs_entry: process-specific binderfs log file
*
* Bookkeeping structure for binder processes
*/
@@ -509,6 +488,7 @@ struct binder_proc {
struct binder_context *context;
spinlock_t inner_lock;
spinlock_t outer_lock;
+ struct dentry *binderfs_entry;
};
enum {
@@ -2988,7 +2968,7 @@ static void binder_transaction(struct binder_proc *proc,
else
return_error = BR_DEAD_REPLY;
mutex_unlock(&context->context_mgr_node_lock);
- if (target_node && target_proc == proc) {
+ if (target_node && target_proc->pid == proc->pid) {
binder_user_error("%d:%d got transaction to context manager from process owning it\n",
proc->pid, thread->pid);
return_error = BR_FAILED_REPLY;
@@ -3239,7 +3219,8 @@ static void binder_transaction(struct binder_proc *proc,
buffer_offset = off_start_offset;
off_end_offset = off_start_offset + tr->offsets_size;
sg_buf_offset = ALIGN(off_end_offset, sizeof(void *));
- sg_buf_end_offset = sg_buf_offset + extra_buffers_size;
+ sg_buf_end_offset = sg_buf_offset + extra_buffers_size -
+ ALIGN(secctx_sz, sizeof(u64));
off_min = 0;
for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
buffer_offset += sizeof(binder_size_t)) {
@@ -5229,6 +5210,8 @@ static int binder_open(struct inode *nodp, struct file *filp)
{
struct binder_proc *proc;
struct binder_device *binder_dev;
+ struct binderfs_info *info;
+ struct dentry *binder_binderfs_dir_entry_proc = NULL;
binder_debug(BINDER_DEBUG_OPEN_CLOSE, "%s: %d:%d\n", __func__,
current->group_leader->pid, current->pid);
@@ -5243,11 +5226,14 @@ static int binder_open(struct inode *nodp, struct file *filp)
INIT_LIST_HEAD(&proc->todo);
proc->default_priority = task_nice(current);
/* binderfs stashes devices in i_private */
- if (is_binderfs_device(nodp))
+ if (is_binderfs_device(nodp)) {
binder_dev = nodp->i_private;
- else
+ info = nodp->i_sb->s_fs_info;
+ binder_binderfs_dir_entry_proc = info->proc_log_dir;
+ } else {
binder_dev = container_of(filp->private_data,
struct binder_device, miscdev);
+ }
proc->context = &binder_dev->context;
binder_alloc_init(&proc->alloc);
@@ -5278,6 +5264,35 @@ static int binder_open(struct inode *nodp, struct file *filp)
&proc_fops);
}
+ if (binder_binderfs_dir_entry_proc) {
+ char strbuf[11];
+ struct dentry *binderfs_entry;
+
+ snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
+ /*
+ * Similar to debugfs, the process specific log file is shared
+ * between contexts. If the file has already been created for a
+ * process, the following binderfs_create_file() call will
+ * fail with error code EEXIST if another context of the same
+ * process invoked binder_open(). This is ok since same as
+ * debugfs, the log file will contain information on all
+ * contexts of a given PID.
+ */
+ binderfs_entry = binderfs_create_file(binder_binderfs_dir_entry_proc,
+ strbuf, &proc_fops, (void *)(unsigned long)proc->pid);
+ if (!IS_ERR(binderfs_entry)) {
+ proc->binderfs_entry = binderfs_entry;
+ } else {
+ int error;
+
+ error = PTR_ERR(binderfs_entry);
+ if (error != -EEXIST) {
+ pr_warn("Unable to create file %s in binderfs (error %d)\n",
+ strbuf, error);
+ }
+ }
+ }
+
return 0;
}
@@ -5317,6 +5332,12 @@ static int binder_release(struct inode *nodp, struct file *filp)
struct binder_proc *proc = filp->private_data;
debugfs_remove(proc->debugfs_entry);
+
+ if (proc->binderfs_entry) {
+ binderfs_remove_file(proc->binderfs_entry);
+ proc->binderfs_entry = NULL;
+ }
+
binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
return 0;
@@ -5906,7 +5927,7 @@ static void print_binder_proc_stats(struct seq_file *m,
}
-static int state_show(struct seq_file *m, void *unused)
+int binder_state_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
struct binder_node *node;
@@ -5945,7 +5966,7 @@ static int state_show(struct seq_file *m, void *unused)
return 0;
}
-static int stats_show(struct seq_file *m, void *unused)
+int binder_stats_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
@@ -5961,7 +5982,7 @@ static int stats_show(struct seq_file *m, void *unused)
return 0;
}
-static int transactions_show(struct seq_file *m, void *unused)
+int binder_transactions_show(struct seq_file *m, void *unused)
{
struct binder_proc *proc;
@@ -6017,7 +6038,7 @@ static void print_binder_transaction_log_entry(struct seq_file *m,
"\n" : " (incomplete)\n");
}
-static int transaction_log_show(struct seq_file *m, void *unused)
+int binder_transaction_log_show(struct seq_file *m, void *unused)
{
struct binder_transaction_log *log = m->private;
unsigned int log_cur = atomic_read(&log->cur);
@@ -6049,11 +6070,6 @@ const struct file_operations binder_fops = {
.release = binder_release,
};
-DEFINE_SHOW_ATTRIBUTE(state);
-DEFINE_SHOW_ATTRIBUTE(stats);
-DEFINE_SHOW_ATTRIBUTE(transactions);
-DEFINE_SHOW_ATTRIBUTE(transaction_log);
-
static int __init init_binder_device(const char *name)
{
int ret;
@@ -6107,30 +6123,31 @@ static int __init binder_init(void)
0444,
binder_debugfs_dir_entry_root,
NULL,
- &state_fops);
+ &binder_state_fops);
debugfs_create_file("stats",
0444,
binder_debugfs_dir_entry_root,
NULL,
- &stats_fops);
+ &binder_stats_fops);
debugfs_create_file("transactions",
0444,
binder_debugfs_dir_entry_root,
NULL,
- &transactions_fops);
+ &binder_transactions_fops);
debugfs_create_file("transaction_log",
0444,
binder_debugfs_dir_entry_root,
&binder_transaction_log,
- &transaction_log_fops);
+ &binder_transaction_log_fops);
debugfs_create_file("failed_transaction_log",
0444,
binder_debugfs_dir_entry_root,
&binder_transaction_log_failed,
- &transaction_log_fops);
+ &binder_transaction_log_fops);
}
- if (strcmp(binder_devices_param, "") != 0) {
+ if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) &&
+ strcmp(binder_devices_param, "") != 0) {
/*
* Copy the module_parameter string, because we don't want to
* tokenize it in-place.
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.