ANDROID: binder: fix KMI issues due to frozen notification
The patches to support binder's frozen notification feature break the
KMI. This change fixes such issues by (1) moving proc->delivered_freeze
into the existing proc_wrapper struction, (2) dropping the frozen stats
support and (3) amending the STG due to a harmless enum binder_work_type
addition.
These are the reported KMI issues fixed by this patch:
function symbol 'int __traceiter_binder_transaction_received(void*, struct binder_transaction*)' changed
CRC changed from 0x74e9c98b to 0xfe0f8640
type 'struct binder_proc' changed
byte size changed from 584 to 632
member 'struct list_head delivered_death' changed
offset changed by 256
member 'struct list_head delivered_freeze' was added
13 members ('u32 max_threads' .. 'u64 android_oem_data1') changed
offset changed by 384
type 'struct binder_thread' changed
byte size changed from 464 to 496
2 members ('atomic_t tmp_ref' .. 'bool is_dead') changed
offset changed by 224
4 members ('struct task_struct* task' .. 'enum binder_prio_state prio_state') changed
offset changed by 256
type 'struct binder_stats' changed
byte size changed from 216 to 244
member changed from 'atomic_t br[21]' to 'atomic_t br[23]'
type changed from 'atomic_t[21]' to 'atomic_t[23]'
number of elements changed from 21 to 23
member changed from 'atomic_t bc[19]' to 'atomic_t bc[22]'
offset changed from 672 to 736
type changed from 'atomic_t[19]' to 'atomic_t[22]'
number of elements changed from 19 to 22
member changed from 'atomic_t obj_created[7]' to 'atomic_t obj_created[8]'
offset changed from 1280 to 1440
type changed from 'atomic_t[7]' to 'atomic_t[8]'
number of elements changed from 7 to 8
member changed from 'atomic_t obj_deleted[7]' to 'atomic_t obj_deleted[8]'
offset changed from 1504 to 1696
type changed from 'atomic_t[7]' to 'atomic_t[8]'
number of elements changed from 7 to 8
type 'enum binder_work_type' changed
enumerator 'BINDER_WORK_FROZEN_BINDER' (10) was added
enumerator 'BINDER_WORK_CLEAR_FREEZE_NOTIFICATION' (11) was added
Bug: 363013421
Change-Id: If9f1f14a2eda215a4c9cb0823c50c8e0e8079ef1
Signed-off-by: Carlos Llamas <cmllamas@google.com>
This commit is contained in:
Carlos Llamas
Ksawlii
parent
82d35f1efa
commit
4a0304ecc3
2 changed files with 16 additions and 18 deletions
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@ -3980,7 +3980,6 @@ binder_request_freeze_notification(struct binder_proc *proc,
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is_frozen = ref->node->proc->is_frozen;
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binder_inner_proc_unlock(ref->node->proc);
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binder_stats_created(BINDER_STAT_FREEZE);
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INIT_LIST_HEAD(&freeze->work.entry);
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freeze->cookie = handle_cookie->cookie;
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freeze->work.type = BINDER_WORK_FROZEN_BINDER;
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@ -4066,7 +4065,7 @@ binder_freeze_notification_done(struct binder_proc *proc,
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struct binder_work *w;
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binder_inner_proc_lock(proc);
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list_for_each_entry(w, &proc->delivered_freeze, entry) {
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list_for_each_entry(w, &proc_wrapper(proc)->delivered_freeze, entry) {
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struct binder_ref_freeze *tmp_freeze =
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container_of(w, struct binder_ref_freeze, work);
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@ -5018,7 +5017,7 @@ retry:
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info.is_frozen = freeze->is_frozen;
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info.cookie = freeze->cookie;
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freeze->sent = true;
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binder_enqueue_work_ilocked(w, &proc->delivered_freeze);
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binder_enqueue_work_ilocked(w, &proc_wrapper(proc)->delivered_freeze);
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binder_inner_proc_unlock(proc);
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if (put_user(BR_FROZEN_BINDER, (uint32_t __user *)ptr))
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@ -5038,7 +5037,6 @@ retry:
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binder_inner_proc_unlock(proc);
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kfree(freeze);
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binder_stats_deleted(BINDER_STAT_FREEZE);
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if (put_user(BR_CLEAR_FREEZE_NOTIFICATION_DONE, (uint32_t __user *)ptr))
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return -EFAULT;
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ptr += sizeof(uint32_t);
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@ -6129,7 +6127,7 @@ static int binder_open(struct inode *nodp, struct file *filp)
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binder_stats_created(BINDER_STAT_PROC);
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proc->pid = current->group_leader->pid;
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INIT_LIST_HEAD(&proc->delivered_death);
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INIT_LIST_HEAD(&proc->delivered_freeze);
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INIT_LIST_HEAD(&proc_wrapper(proc)->delivered_freeze);
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INIT_LIST_HEAD(&proc->waiting_threads);
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filp->private_data = proc;
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@ -6809,9 +6807,6 @@ static const char * const binder_return_strings[] = {
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"BR_FAILED_REPLY",
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"BR_FROZEN_REPLY",
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"BR_ONEWAY_SPAM_SUSPECT",
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"UNSUPPORTED",
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"BR_FROZEN_BINDER",
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"BR_CLEAR_FREEZE_NOTIFICATION_DONE",
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};
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static const char * const binder_command_strings[] = {
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@ -6834,9 +6829,6 @@ static const char * const binder_command_strings[] = {
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"BC_DEAD_BINDER_DONE",
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"BC_TRANSACTION_SG",
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"BC_REPLY_SG",
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"BC_REQUEST_FREEZE_NOTIFICATION",
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"BC_CLEAR_FREEZE_NOTIFICATION",
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"BC_FREEZE_NOTIFICATION_DONE",
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};
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static const char * const binder_objstat_strings[] = {
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@ -6847,7 +6839,6 @@ static const char * const binder_objstat_strings[] = {
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"death",
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"transaction",
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"transaction_complete",
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"freeze",
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};
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static void print_binder_stats(struct seq_file *m, const char *prefix,
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@ -129,13 +129,12 @@ enum binder_stat_types {
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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_FREEZE,
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BINDER_STAT_COUNT
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};
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struct binder_stats {
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atomic_t br[_IOC_NR(BR_CLEAR_FREEZE_NOTIFICATION_DONE) + 1];
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atomic_t bc[_IOC_NR(BC_FREEZE_NOTIFICATION_DONE) + 1];
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atomic_t br[_IOC_NR(BR_ONEWAY_SPAM_SUSPECT) + 1];
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atomic_t bc[_IOC_NR(BC_REPLY_SG) + 1];
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atomic_t obj_created[BINDER_STAT_COUNT];
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atomic_t obj_deleted[BINDER_STAT_COUNT];
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};
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@ -159,8 +158,10 @@ struct binder_work {
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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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#ifndef __GENKSYMS__
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BINDER_WORK_FROZEN_BINDER,
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BINDER_WORK_CLEAR_FREEZE_NOTIFICATION,
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#endif
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} type;
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};
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@ -405,8 +406,6 @@ struct binder_priority {
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* (atomics, no lock needed)
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* @delivered_death: list of delivered death notification
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* (protected by @inner_lock)
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* @delivered_freeze: list of delivered freeze notification
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* (protected by @inner_lock)
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* @max_threads: cap on number of binder threads
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* (protected by @inner_lock)
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* @requested_threads: number of binder threads requested but not
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@ -453,7 +452,6 @@ struct binder_proc {
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struct list_head todo;
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struct binder_stats stats;
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struct list_head delivered_death;
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struct list_head delivered_freeze;
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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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@ -474,6 +472,8 @@ struct binder_proc {
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* @cred struct cred associated with the `struct file`
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* in binder_open()
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* (invariant after initialized)
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* @delivered_freeze: list of delivered freeze notification
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* (protected by @inner_lock)
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*
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* Extended binder_proc -- needed to add the "cred" field without
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* changing the KMI for binder_proc.
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@ -481,6 +481,7 @@ struct binder_proc {
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struct binder_proc_ext {
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struct binder_proc proc;
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const struct cred *cred;
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struct list_head delivered_freeze;
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};
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static inline const struct cred *binder_get_cred(struct binder_proc *proc)
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@ -491,6 +492,12 @@ static inline const struct cred *binder_get_cred(struct binder_proc *proc)
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return eproc->cred;
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}
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static inline
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struct binder_proc_ext *proc_wrapper(struct binder_proc *proc)
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{
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return container_of(proc, struct binder_proc_ext, proc);
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}
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/**
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* struct binder_thread - binder thread bookkeeping
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* @proc: binder process for this thread
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