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Message-ID: <1595906401-11985-2-git-send-email-Frankie.Chang@mediatek.com>
Date: Tue, 28 Jul 2020 11:19:59 +0800
From: Frankie Chang <Frankie.Chang@...iatek.com>
To: Todd Kjos <tkjos@...gle.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Joel Fernandes <joel@...lfernandes.org>,
Martijn Coenen <maco@...roid.com>,
Arve Hjønnevåg <arve@...roid.com>,
Christian Brauner <christian@...uner.io>,
<linux-kernel@...r.kernel.org>,
<linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>,
Jian-Min Liu <Jian-Min.Liu@...iatek.com>,
Frankie Chang <Frankie.Chang@...iatek.com>
Subject: [PATCH v6 1/3] binder: move structs from core file to header file
From: "Frankie.Chang" <Frankie.Chang@...iatek.com>
Moving all structs to header file makes module more
extendable, and makes all these structs to be defined
in the same file.
Signed-off-by: Frankie.Chang <Frankie.Chang@...iatek.com>
---
drivers/android/binder.c | 405 -------------------------------------
drivers/android/binder_internal.h | 404 ++++++++++++++++++++++++++++++++++++
2 files changed, 404 insertions(+), 405 deletions(-)
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index a6b2082..2df146f 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -72,7 +72,6 @@
#include <asm/cacheflush.h>
-#include "binder_alloc.h"
#include "binder_internal.h"
#include "binder_trace.h"
@@ -160,24 +159,6 @@ static int binder_set_stop_on_user_error(const char *val,
#define to_binder_fd_array_object(hdr) \
container_of(hdr, struct binder_fd_array_object, hdr)
-enum binder_stat_types {
- BINDER_STAT_PROC,
- BINDER_STAT_THREAD,
- BINDER_STAT_NODE,
- BINDER_STAT_REF,
- BINDER_STAT_DEATH,
- BINDER_STAT_TRANSACTION,
- BINDER_STAT_TRANSACTION_COMPLETE,
- BINDER_STAT_COUNT
-};
-
-struct binder_stats {
- atomic_t br[_IOC_NR(BR_FAILED_REPLY) + 1];
- atomic_t bc[_IOC_NR(BC_REPLY_SG) + 1];
- atomic_t obj_created[BINDER_STAT_COUNT];
- atomic_t obj_deleted[BINDER_STAT_COUNT];
-};
-
static struct binder_stats binder_stats;
static inline void binder_stats_deleted(enum binder_stat_types type)
@@ -213,278 +194,11 @@ static struct binder_transaction_log_entry *binder_transaction_log_add(
return e;
}
-/**
- * struct binder_work - work enqueued on a worklist
- * @entry: node enqueued on list
- * @type: type of work to be performed
- *
- * There are separate work lists for proc, thread, and node (async).
- */
-struct binder_work {
- struct list_head entry;
-
- enum {
- BINDER_WORK_TRANSACTION = 1,
- BINDER_WORK_TRANSACTION_COMPLETE,
- BINDER_WORK_RETURN_ERROR,
- BINDER_WORK_NODE,
- BINDER_WORK_DEAD_BINDER,
- BINDER_WORK_DEAD_BINDER_AND_CLEAR,
- BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
- } type;
-};
-
-struct binder_error {
- struct binder_work work;
- uint32_t cmd;
-};
-
-/**
- * struct binder_node - binder node bookkeeping
- * @debug_id: unique ID for debugging
- * (invariant after initialized)
- * @lock: lock for node fields
- * @work: worklist element for node work
- * (protected by @proc->inner_lock)
- * @rb_node: element for proc->nodes tree
- * (protected by @proc->inner_lock)
- * @dead_node: element for binder_dead_nodes list
- * (protected by binder_dead_nodes_lock)
- * @proc: binder_proc that owns this node
- * (invariant after initialized)
- * @refs: list of references on this node
- * (protected by @lock)
- * @internal_strong_refs: used to take strong references when
- * initiating a transaction
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @local_weak_refs: weak user refs from local process
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @local_strong_refs: strong user refs from local process
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @tmp_refs: temporary kernel refs
- * (protected by @proc->inner_lock while @proc
- * is valid, and by binder_dead_nodes_lock
- * if @proc is NULL. During inc/dec and node release
- * it is also protected by @lock to provide safety
- * as the node dies and @proc becomes NULL)
- * @ptr: userspace pointer for node
- * (invariant, no lock needed)
- * @cookie: userspace cookie for node
- * (invariant, no lock needed)
- * @has_strong_ref: userspace notified of strong ref
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @pending_strong_ref: userspace has acked notification of strong ref
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @has_weak_ref: userspace notified of weak ref
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @pending_weak_ref: userspace has acked notification of weak ref
- * (protected by @proc->inner_lock if @proc
- * and by @lock)
- * @has_async_transaction: async transaction to node in progress
- * (protected by @lock)
- * @accept_fds: file descriptor operations supported for node
- * (invariant after initialized)
- * @min_priority: minimum scheduling priority
- * (invariant after initialized)
- * @txn_security_ctx: require sender's security context
- * (invariant after initialized)
- * @async_todo: list of async work items
- * (protected by @proc->inner_lock)
- *
- * Bookkeeping structure for binder nodes.
- */
-struct binder_node {
- int debug_id;
- spinlock_t lock;
- struct binder_work work;
- union {
- struct rb_node rb_node;
- struct hlist_node dead_node;
- };
- struct binder_proc *proc;
- struct hlist_head refs;
- int internal_strong_refs;
- int local_weak_refs;
- int local_strong_refs;
- int tmp_refs;
- binder_uintptr_t ptr;
- binder_uintptr_t cookie;
- struct {
- /*
- * bitfield elements protected by
- * proc inner_lock
- */
- u8 has_strong_ref:1;
- u8 pending_strong_ref:1;
- u8 has_weak_ref:1;
- u8 pending_weak_ref:1;
- };
- struct {
- /*
- * invariant after initialization
- */
- u8 accept_fds:1;
- u8 txn_security_ctx:1;
- u8 min_priority;
- };
- bool has_async_transaction;
- struct list_head async_todo;
-};
-
-struct binder_ref_death {
- /**
- * @work: worklist element for death notifications
- * (protected by inner_lock of the proc that
- * this ref belongs to)
- */
- struct binder_work work;
- binder_uintptr_t cookie;
-};
-
-/**
- * struct binder_ref_data - binder_ref counts and id
- * @debug_id: unique ID for the ref
- * @desc: unique userspace handle for ref
- * @strong: strong ref count (debugging only if not locked)
- * @weak: weak ref count (debugging only if not locked)
- *
- * Structure to hold ref count and ref id information. Since
- * the actual ref can only be accessed with a lock, this structure
- * is used to return information about the ref to callers of
- * ref inc/dec functions.
- */
-struct binder_ref_data {
- int debug_id;
- uint32_t desc;
- int strong;
- int weak;
-};
-
-/**
- * struct binder_ref - struct to track references on nodes
- * @data: binder_ref_data containing id, handle, and current refcounts
- * @rb_node_desc: node for lookup by @data.desc in proc's rb_tree
- * @rb_node_node: node for lookup by @node in proc's rb_tree
- * @node_entry: list entry for node->refs list in target node
- * (protected by @node->lock)
- * @proc: binder_proc containing ref
- * @node: binder_node of target node. When cleaning up a
- * ref for deletion in binder_cleanup_ref, a non-NULL
- * @node indicates the node must be freed
- * @death: pointer to death notification (ref_death) if requested
- * (protected by @node->lock)
- *
- * Structure to track references from procA to target node (on procB). This
- * structure is unsafe to access without holding @proc->outer_lock.
- */
-struct binder_ref {
- /* Lookups needed: */
- /* node + proc => ref (transaction) */
- /* desc + proc => ref (transaction, inc/dec ref) */
- /* node => refs + procs (proc exit) */
- struct binder_ref_data data;
- struct rb_node rb_node_desc;
- struct rb_node rb_node_node;
- struct hlist_node node_entry;
- struct binder_proc *proc;
- struct binder_node *node;
- struct binder_ref_death *death;
-};
-
enum binder_deferred_state {
BINDER_DEFERRED_FLUSH = 0x01,
BINDER_DEFERRED_RELEASE = 0x02,
};
-/**
- * struct binder_proc - binder process bookkeeping
- * @proc_node: element for binder_procs list
- * @threads: rbtree of binder_threads in this proc
- * (protected by @inner_lock)
- * @nodes: rbtree of binder nodes associated with
- * this proc ordered by node->ptr
- * (protected by @inner_lock)
- * @refs_by_desc: rbtree of refs ordered by ref->desc
- * (protected by @outer_lock)
- * @refs_by_node: rbtree of refs ordered by ref->node
- * (protected by @outer_lock)
- * @waiting_threads: threads currently waiting for proc work
- * (protected by @inner_lock)
- * @pid PID of group_leader of process
- * (invariant after initialized)
- * @tsk task_struct for group_leader of process
- * (invariant after initialized)
- * @deferred_work_node: element for binder_deferred_list
- * (protected by binder_deferred_lock)
- * @deferred_work: bitmap of deferred work to perform
- * (protected by binder_deferred_lock)
- * @is_dead: process is dead and awaiting free
- * when outstanding transactions are cleaned up
- * (protected by @inner_lock)
- * @todo: list of work for this process
- * (protected by @inner_lock)
- * @stats: per-process binder statistics
- * (atomics, no lock needed)
- * @delivered_death: list of delivered death notification
- * (protected by @inner_lock)
- * @max_threads: cap on number of binder threads
- * (protected by @inner_lock)
- * @requested_threads: number of binder threads requested but not
- * yet started. In current implementation, can
- * only be 0 or 1.
- * (protected by @inner_lock)
- * @requested_threads_started: number binder threads started
- * (protected by @inner_lock)
- * @tmp_ref: temporary reference to indicate proc is in use
- * (protected by @inner_lock)
- * @default_priority: default scheduler priority
- * (invariant after initialized)
- * @debugfs_entry: debugfs node
- * @alloc: binder allocator bookkeeping
- * @context: binder_context for this proc
- * (invariant after initialized)
- * @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
- */
-struct binder_proc {
- struct hlist_node proc_node;
- struct rb_root threads;
- struct rb_root nodes;
- struct rb_root refs_by_desc;
- struct rb_root refs_by_node;
- struct list_head waiting_threads;
- int pid;
- struct task_struct *tsk;
- struct hlist_node deferred_work_node;
- int deferred_work;
- bool is_dead;
-
- struct list_head todo;
- struct binder_stats stats;
- struct list_head delivered_death;
- int max_threads;
- int requested_threads;
- int requested_threads_started;
- int tmp_ref;
- long default_priority;
- struct dentry *debugfs_entry;
- struct binder_alloc alloc;
- struct binder_context *context;
- spinlock_t inner_lock;
- spinlock_t outer_lock;
- struct dentry *binderfs_entry;
-};
-
enum {
BINDER_LOOPER_STATE_REGISTERED = 0x01,
BINDER_LOOPER_STATE_ENTERED = 0x02,
@@ -495,125 +209,6 @@ enum {
};
/**
- * struct binder_thread - binder thread bookkeeping
- * @proc: binder process for this thread
- * (invariant after initialization)
- * @rb_node: element for proc->threads rbtree
- * (protected by @proc->inner_lock)
- * @waiting_thread_node: element for @proc->waiting_threads list
- * (protected by @proc->inner_lock)
- * @pid: PID for this thread
- * (invariant after initialization)
- * @looper: bitmap of looping state
- * (only accessed by this thread)
- * @looper_needs_return: looping thread needs to exit driver
- * (no lock needed)
- * @transaction_stack: stack of in-progress transactions for this thread
- * (protected by @proc->inner_lock)
- * @todo: list of work to do for this thread
- * (protected by @proc->inner_lock)
- * @process_todo: whether work in @todo should be processed
- * (protected by @proc->inner_lock)
- * @return_error: transaction errors reported by this thread
- * (only accessed by this thread)
- * @reply_error: transaction errors reported by target thread
- * (protected by @proc->inner_lock)
- * @wait: wait queue for thread work
- * @stats: per-thread statistics
- * (atomics, no lock needed)
- * @tmp_ref: temporary reference to indicate thread is in use
- * (atomic since @proc->inner_lock cannot
- * always be acquired)
- * @is_dead: thread is dead and awaiting free
- * when outstanding transactions are cleaned up
- * (protected by @proc->inner_lock)
- *
- * Bookkeeping structure for binder threads.
- */
-struct binder_thread {
- struct binder_proc *proc;
- struct rb_node rb_node;
- struct list_head waiting_thread_node;
- int pid;
- int looper; /* only modified by this thread */
- bool looper_need_return; /* can be written by other thread */
- struct binder_transaction *transaction_stack;
- struct list_head todo;
- bool process_todo;
- struct binder_error return_error;
- struct binder_error reply_error;
- wait_queue_head_t wait;
- struct binder_stats stats;
- atomic_t tmp_ref;
- bool is_dead;
-};
-
-/**
- * struct binder_txn_fd_fixup - transaction fd fixup list element
- * @fixup_entry: list entry
- * @file: struct file to be associated with new fd
- * @offset: offset in buffer data to this fixup
- *
- * List element for fd fixups in a transaction. Since file
- * descriptors need to be allocated in the context of the
- * target process, we pass each fd to be processed in this
- * struct.
- */
-struct binder_txn_fd_fixup {
- struct list_head fixup_entry;
- struct file *file;
- size_t offset;
-};
-
-struct binder_transaction {
- int debug_id;
- struct binder_work work;
- struct binder_thread *from;
- struct binder_transaction *from_parent;
- struct binder_proc *to_proc;
- struct binder_thread *to_thread;
- struct binder_transaction *to_parent;
- unsigned need_reply:1;
- /* unsigned is_dead:1; */ /* not used at the moment */
-
- struct binder_buffer *buffer;
- unsigned int code;
- unsigned int flags;
- long priority;
- long saved_priority;
- kuid_t sender_euid;
- struct list_head fd_fixups;
- binder_uintptr_t security_ctx;
- /**
- * @lock: protects @from, @to_proc, and @to_thread
- *
- * @from, @to_proc, and @to_thread can be set to NULL
- * during thread teardown
- */
- spinlock_t lock;
-};
-
-/**
- * struct binder_object - union of flat binder object types
- * @hdr: generic object header
- * @fbo: binder object (nodes and refs)
- * @fdo: file descriptor object
- * @bbo: binder buffer pointer
- * @fdao: file descriptor array
- *
- * Used for type-independent object copies
- */
-struct binder_object {
- union {
- struct binder_object_header hdr;
- struct flat_binder_object fbo;
- struct binder_fd_object fdo;
- struct binder_buffer_object bbo;
- struct binder_fd_array_object fdao;
- };
-};
-
-/**
* binder_proc_lock() - Acquire outer lock for given binder_proc
* @proc: struct binder_proc to acquire
*
diff --git a/drivers/android/binder_internal.h b/drivers/android/binder_internal.h
index ae99109..5b65413 100644
--- a/drivers/android/binder_internal.h
+++ b/drivers/android/binder_internal.h
@@ -11,6 +11,7 @@
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/uidgid.h>
+#include "binder_alloc.h"
struct binder_context {
struct binder_node *binder_context_mgr_node;
@@ -139,6 +140,409 @@ struct binder_transaction_log {
struct binder_transaction_log_entry entry[32];
};
+enum binder_stat_types {
+ BINDER_STAT_PROC,
+ BINDER_STAT_THREAD,
+ BINDER_STAT_NODE,
+ BINDER_STAT_REF,
+ BINDER_STAT_DEATH,
+ BINDER_STAT_TRANSACTION,
+ BINDER_STAT_TRANSACTION_COMPLETE,
+ BINDER_STAT_COUNT
+};
+
+struct binder_stats {
+ atomic_t br[_IOC_NR(BR_FAILED_REPLY) + 1];
+ atomic_t bc[_IOC_NR(BC_REPLY_SG) + 1];
+ atomic_t obj_created[BINDER_STAT_COUNT];
+ atomic_t obj_deleted[BINDER_STAT_COUNT];
+};
+
+/**
+ * struct binder_work - work enqueued on a worklist
+ * @entry: node enqueued on list
+ * @type: type of work to be performed
+ *
+ * There are separate work lists for proc, thread, and node (async).
+ */
+struct binder_work {
+ struct list_head entry;
+
+ enum {
+ BINDER_WORK_TRANSACTION = 1,
+ BINDER_WORK_TRANSACTION_COMPLETE,
+ BINDER_WORK_RETURN_ERROR,
+ BINDER_WORK_NODE,
+ BINDER_WORK_DEAD_BINDER,
+ BINDER_WORK_DEAD_BINDER_AND_CLEAR,
+ BINDER_WORK_CLEAR_DEATH_NOTIFICATION,
+ } type;
+};
+
+struct binder_error {
+ struct binder_work work;
+ uint32_t cmd;
+};
+
+/* struct binder_node - binder node bookkeeping
+ * @debug_id: unique ID for debugging
+ * (invariant after initialized)
+ * @lock: lock for node fields
+ * @work: worklist element for node work
+ * (protected by @proc->inner_lock)
+ * @rb_node: element for proc->nodes tree
+ * (protected by @proc->inner_lock)
+ * @dead_node: element for binder_dead_nodes list
+ * (protected by binder_dead_nodes_lock)
+ * @proc: binder_proc that owns this node
+ * (invariant after initialized)
+ * @refs: list of references on this node
+ * (protected by @lock)
+ * @internal_strong_refs: used to take strong references when
+ * initiating a transaction
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @local_weak_refs: weak user refs from local process
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @local_strong_refs: strong user refs from local process
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @tmp_refs: temporary kernel refs
+ * (protected by @proc->inner_lock while @proc
+ * is valid, and by binder_dead_nodes_lock
+ * if @proc is NULL. During inc/dec and node release
+ * it is also protected by @lock to provide safety
+ * as the node dies and @proc becomes NULL)
+ * @ptr: userspace pointer for node
+ * (invariant, no lock needed)
+ * @cookie: userspace cookie for node
+ * (invariant, no lock needed)
+ * @has_strong_ref: userspace notified of strong ref
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @pending_strong_ref: userspace has acked notification of strong ref
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @has_weak_ref: userspace notified of weak ref
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @pending_weak_ref: userspace has acked notification of weak ref
+ * (protected by @proc->inner_lock if @proc
+ * and by @lock)
+ * @has_async_transaction: async transaction to node in progress
+ * (protected by @lock)
+ * @accept_fds: file descriptor operations supported for node
+ * (invariant after initialized)
+ * @min_priority: minimum scheduling priority
+ * (invariant after initialized)
+ * @txn_security_ctx: require sender's security context
+ * (invariant after initialized)
+ * @async_todo: list of async work items
+ * (protected by @proc->inner_lock)
+ *
+ * Bookkeeping structure for binder nodes.
+ */
+struct binder_node {
+ int debug_id;
+ spinlock_t lock;
+ struct binder_work work;
+ union {
+ struct rb_node rb_node;
+ struct hlist_node dead_node;
+ };
+ struct binder_proc *proc;
+ struct hlist_head refs;
+ int internal_strong_refs;
+ int local_weak_refs;
+ int local_strong_refs;
+ int tmp_refs;
+ binder_uintptr_t ptr;
+ binder_uintptr_t cookie;
+ struct {
+ /*
+ * bitfield elements protected by
+ * proc inner_lock
+ */
+ u8 has_strong_ref:1;
+ u8 pending_strong_ref:1;
+ u8 has_weak_ref:1;
+ u8 pending_weak_ref:1;
+ };
+ struct {
+ /*
+ * invariant after initialization
+ */
+ u8 accept_fds:1;
+ u8 txn_security_ctx:1;
+ u8 min_priority;
+ };
+ bool has_async_transaction;
+ struct list_head async_todo;
+};
+
+struct binder_ref_death {
+ /**
+ * @work: worklist element for death notifications
+ * (protected by inner_lock of the proc that
+ * this ref belongs to)
+ */
+ struct binder_work work;
+ binder_uintptr_t cookie;
+};
+
+/**
+ * struct binder_ref_data - binder_ref counts and id
+ * @debug_id: unique ID for the ref
+ * @desc: unique userspace handle for ref
+ * @strong: strong ref count (debugging only if not locked)
+ * @weak: weak ref count (debugging only if not locked)
+ *
+ * Structure to hold ref count and ref id information. Since
+ * the actual ref can only be accessed with a lock, this structure
+ * is used to return information about the ref to callers of
+ * ref inc/dec functions.
+ */
+struct binder_ref_data {
+ int debug_id;
+ uint32_t desc;
+ int strong;
+ int weak;
+};
+
+/**
+ * struct binder_ref - struct to track references on nodes
+ * @data: binder_ref_data containing id, handle, and current refcounts
+ * @rb_node_desc: node for lookup by @data.desc in proc's rb_tree
+ * @rb_node_node: node for lookup by @node in proc's rb_tree
+ * @node_entry: list entry for node->refs list in target node
+ * (protected by @node->lock)
+ * @proc: binder_proc containing ref
+ * @node: binder_node of target node. When cleaning up a
+ * ref for deletion in binder_cleanup_ref, a non-NULL
+ * @node indicates the node must be freed
+ * @death: pointer to death notification (ref_death) if requested
+ * (protected by @node->lock)
+ *
+ * Structure to track references from procA to target node (on procB). This
+ * structure is unsafe to access without holding @proc->outer_lock.
+ */
+struct binder_ref {
+ /* Lookups needed: */
+ /* node + proc => ref (transaction) */
+ /* desc + proc => ref (transaction, inc/dec ref) */
+ /* node => refs + procs (proc exit) */
+ struct binder_ref_data data;
+ struct rb_node rb_node_desc;
+ struct rb_node rb_node_node;
+ struct hlist_node node_entry;
+ struct binder_proc *proc;
+ struct binder_node *node;
+ struct binder_ref_death *death;
+};
+
+/**
+ * struct binder_proc - binder process bookkeeping
+ * @proc_node: element for binder_procs list
+ * @threads: rbtree of binder_threads in this proc
+ * (protected by @inner_lock)
+ * @nodes: rbtree of binder nodes associated with
+ * this proc ordered by node->ptr
+ * (protected by @inner_lock)
+ * @refs_by_desc: rbtree of refs ordered by ref->desc
+ * (protected by @outer_lock)
+ * @refs_by_node: rbtree of refs ordered by ref->node
+ * (protected by @outer_lock)
+ * @waiting_threads: threads currently waiting for proc work
+ * (protected by @inner_lock)
+ * @pid PID of group_leader of process
+ * (invariant after initialized)
+ * @tsk task_struct for group_leader of process
+ * (invariant after initialized)
+ * @deferred_work_node: element for binder_deferred_list
+ * (protected by binder_deferred_lock)
+ * @deferred_work: bitmap of deferred work to perform
+ * (protected by binder_deferred_lock)
+ * @is_dead: process is dead and awaiting free
+ * when outstanding transactions are cleaned up
+ * (protected by @inner_lock)
+ * @todo: list of work for this process
+ * (protected by @inner_lock)
+ * @stats: per-process binder statistics
+ * (atomics, no lock needed)
+ * @delivered_death: list of delivered death notification
+ * (protected by @inner_lock)
+ * @max_threads: cap on number of binder threads
+ * (protected by @inner_lock)
+ * @requested_threads: number of binder threads requested but not
+ * yet started. In current implementation, can
+ * only be 0 or 1.
+ * (protected by @inner_lock)
+ * @requested_threads_started: number binder threads started
+ * (protected by @inner_lock)
+ * @tmp_ref: temporary reference to indicate proc is in use
+ * (protected by @inner_lock)
+ * @default_priority: default scheduler priority
+ * (invariant after initialized)
+ * @debugfs_entry: debugfs node
+ * @alloc: binder allocator bookkeeping
+ * @context: binder_context for this proc
+ * (invariant after initialized)
+ * @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
+ */
+struct binder_proc {
+ struct hlist_node proc_node;
+ struct rb_root threads;
+ struct rb_root nodes;
+ struct rb_root refs_by_desc;
+ struct rb_root refs_by_node;
+ struct list_head waiting_threads;
+ int pid;
+ struct task_struct *tsk;
+ struct hlist_node deferred_work_node;
+ int deferred_work;
+ bool is_dead;
+
+ struct list_head todo;
+ struct binder_stats stats;
+ struct list_head delivered_death;
+ int max_threads;
+ int requested_threads;
+ int requested_threads_started;
+ int tmp_ref;
+ long default_priority;
+ struct dentry *debugfs_entry;
+ struct binder_alloc alloc;
+ struct binder_context *context;
+ spinlock_t inner_lock;
+ spinlock_t outer_lock;
+ struct dentry *binderfs_entry;
+};
+
+/**
+ * struct binder_thread - binder thread bookkeeping
+ * @proc: binder process for this thread
+ * (invariant after initialization)
+ * @rb_node: element for proc->threads rbtree
+ * (protected by @proc->inner_lock)
+ * @waiting_thread_node: element for @proc->waiting_threads list
+ * (protected by @proc->inner_lock)
+ * @pid: PID for this thread
+ * (invariant after initialization)
+ * @looper: bitmap of looping state
+ * (only accessed by this thread)
+ * @looper_needs_return: looping thread needs to exit driver
+ * (no lock needed)
+ * @transaction_stack: stack of in-progress transactions for this thread
+ * (protected by @proc->inner_lock)
+ * @todo: list of work to do for this thread
+ * (protected by @proc->inner_lock)
+ * @process_todo: whether work in @todo should be processed
+ * (protected by @proc->inner_lock)
+ * @return_error: transaction errors reported by this thread
+ * (only accessed by this thread)
+ * @reply_error: transaction errors reported by target thread
+ * (protected by @proc->inner_lock)
+ * @wait: wait queue for thread work
+ * @stats: per-thread statistics
+ * (atomics, no lock needed)
+ * @tmp_ref: temporary reference to indicate thread is in use
+ * (atomic since @proc->inner_lock cannot
+ * always be acquired)
+ * @is_dead: thread is dead and awaiting free
+ * when outstanding transactions are cleaned up
+ * (protected by @proc->inner_lock)
+ *
+ * Bookkeeping structure for binder threads.
+ */
+struct binder_thread {
+ struct binder_proc *proc;
+ struct rb_node rb_node;
+ struct list_head waiting_thread_node;
+ int pid;
+ int looper; /* only modified by this thread */
+ bool looper_need_return; /* can be written by other thread */
+ struct binder_transaction *transaction_stack;
+ struct list_head todo;
+ bool process_todo;
+ struct binder_error return_error;
+ struct binder_error reply_error;
+ wait_queue_head_t wait;
+ struct binder_stats stats;
+ atomic_t tmp_ref;
+ bool is_dead;
+};
+
+/**
+ * struct binder_txn_fd_fixup - transaction fd fixup list element
+ * @fixup_entry: list entry
+ * @file: struct file to be associated with new fd
+ * @offset: offset in buffer data to this fixup
+ *
+ * List element for fd fixups in a transaction. Since file
+ * descriptors need to be allocated in the context of the
+ * target process, we pass each fd to be processed in this
+ * struct.
+ */
+struct binder_txn_fd_fixup {
+ struct list_head fixup_entry;
+ struct file *file;
+ size_t offset;
+};
+
+struct binder_transaction {
+ int debug_id;
+ struct binder_work work;
+ struct binder_thread *from;
+ struct binder_transaction *from_parent;
+ struct binder_proc *to_proc;
+ struct binder_thread *to_thread;
+ struct binder_transaction *to_parent;
+ unsigned need_reply:1;
+ /* unsigned is_dead:1; */ /* not used at the moment */
+
+ struct binder_buffer *buffer;
+ unsigned int code;
+ unsigned int flags;
+ long priority;
+ long saved_priority;
+ kuid_t sender_euid;
+ struct list_head fd_fixups;
+ binder_uintptr_t security_ctx;
+ /**
+ * @lock: protects @from, @to_proc, and @to_thread
+ *
+ * @from, @to_proc, and @to_thread can be set to NULL
+ * during thread teardown
+ */
+ spinlock_t lock;
+};
+
+/**
+ * struct binder_object - union of flat binder object types
+ * @hdr: generic object header
+ * @fbo: binder object (nodes and refs)
+ * @fdo: file descriptor object
+ * @bbo: binder buffer pointer
+ * @fdao: file descriptor array
+ *
+ * Used for type-independent object copies
+ */
+struct binder_object {
+ union {
+ struct binder_object_header hdr;
+ struct flat_binder_object fbo;
+ struct binder_fd_object fdo;
+ struct binder_buffer_object bbo;
+ struct binder_fd_array_object fdao;
+ };
+};
+
extern struct binder_transaction_log binder_transaction_log;
extern struct binder_transaction_log binder_transaction_log_failed;
#endif /* _LINUX_BINDER_INTERNAL_H */
--
1.7.9.5
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