Lines Matching full:buffer
50 static struct binder_buffer *binder_buffer_next(struct binder_buffer *buffer) in binder_buffer_next() argument
52 return list_entry(buffer->entry.next, struct binder_buffer, entry); in binder_buffer_next()
55 static struct binder_buffer *binder_buffer_prev(struct binder_buffer *buffer) in binder_buffer_prev() argument
57 return list_entry(buffer->entry.prev, struct binder_buffer, entry); in binder_buffer_prev()
61 struct binder_buffer *buffer) in binder_alloc_buffer_size() argument
63 if (list_is_last(&buffer->entry, &alloc->buffers)) in binder_alloc_buffer_size()
64 return alloc->vm_start + alloc->buffer_size - buffer->user_data; in binder_alloc_buffer_size()
65 return binder_buffer_next(buffer)->user_data - buffer->user_data; in binder_alloc_buffer_size()
73 struct binder_buffer *buffer; in binder_insert_free_buffer() local
82 "%d: add free buffer, size %zd, at %pK\n", in binder_insert_free_buffer()
87 buffer = rb_entry(parent, struct binder_buffer, rb_node); in binder_insert_free_buffer()
88 BUG_ON(!buffer->free); in binder_insert_free_buffer()
90 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_insert_free_buffer()
106 struct binder_buffer *buffer; in binder_insert_allocated_buffer_locked() local
112 buffer = rb_entry(parent, struct binder_buffer, rb_node); in binder_insert_allocated_buffer_locked()
113 BUG_ON(buffer->free); in binder_insert_allocated_buffer_locked()
115 if (new_buffer->user_data < buffer->user_data) in binder_insert_allocated_buffer_locked()
117 else if (new_buffer->user_data > buffer->user_data) in binder_insert_allocated_buffer_locked()
131 struct binder_buffer *buffer; in binder_alloc_prepare_to_free_locked() local
134 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_prepare_to_free_locked()
135 BUG_ON(buffer->free); in binder_alloc_prepare_to_free_locked()
137 if (user_ptr < buffer->user_data) { in binder_alloc_prepare_to_free_locked()
139 } else if (user_ptr > buffer->user_data) { in binder_alloc_prepare_to_free_locked()
144 * free the buffer when in use by kernel or in binder_alloc_prepare_to_free_locked()
147 if (!buffer->allow_user_free) in binder_alloc_prepare_to_free_locked()
149 buffer->allow_user_free = 0; in binder_alloc_prepare_to_free_locked()
150 return buffer; in binder_alloc_prepare_to_free_locked()
157 * binder_alloc_prepare_to_free() - get buffer given user ptr
159 * @user_ptr: User pointer to buffer data
161 * Validate userspace pointer to buffer data and return buffer corresponding to
162 * that user pointer. Search the rb tree for buffer that matches user data
165 * Return: Pointer to buffer or NULL
170 struct binder_buffer *buffer; in binder_alloc_prepare_to_free() local
173 buffer = binder_alloc_prepare_to_free_locked(alloc, user_ptr); in binder_alloc_prepare_to_free()
175 return buffer; in binder_alloc_prepare_to_free()
364 struct binder_buffer *buffer, in binder_install_buffer_pages() argument
370 start = buffer->user_data & PAGE_MASK; in binder_install_buffer_pages()
371 final = PAGE_ALIGN(buffer->user_data + size); in binder_install_buffer_pages()
430 struct binder_buffer *buffer; in debug_no_space_locked() local
440 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_no_space_locked()
441 buffer_size = binder_alloc_buffer_size(alloc, buffer); in debug_no_space_locked()
449 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_no_space_locked()
450 buffer_size = binder_alloc_buffer_size(alloc, buffer); in debug_no_space_locked()
473 struct binder_buffer *buffer; in debug_low_async_space_locked() local
481 * space left (which is less than 10% of total buffer size). in debug_low_async_space_locked()
490 buffer = rb_entry(n, struct binder_buffer, rb_node); in debug_low_async_space_locked()
491 if (buffer->pid != pid) in debug_low_async_space_locked()
493 if (!buffer->async_transaction) in debug_low_async_space_locked()
495 total_alloc_size += binder_alloc_buffer_size(alloc, buffer); in debug_low_async_space_locked()
501 * async space (which is 25% of total buffer size). Oneway spam is only in debug_low_async_space_locked()
525 struct binder_buffer *buffer; in binder_alloc_new_buf_locked() local
534 buffer = ERR_PTR(-ENOSPC); in binder_alloc_new_buf_locked()
539 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_new_buf_locked()
540 BUG_ON(!buffer->free); in binder_alloc_new_buf_locked()
541 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_new_buf_locked()
559 buffer = ERR_PTR(-ENOSPC); in binder_alloc_new_buf_locked()
564 /* Found an oversized buffer and needs to be split */ in binder_alloc_new_buf_locked()
565 buffer = rb_entry(best_fit, struct binder_buffer, rb_node); in binder_alloc_new_buf_locked()
566 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_new_buf_locked()
569 new_buffer->user_data = buffer->user_data + size; in binder_alloc_new_buf_locked()
570 list_add(&new_buffer->entry, &buffer->entry); in binder_alloc_new_buf_locked()
577 "%d: binder_alloc_buf size %zd got buffer %pK size %zd\n", in binder_alloc_new_buf_locked()
578 alloc->pid, size, buffer, buffer_size); in binder_alloc_new_buf_locked()
583 * adjacent in-use buffer. In such case, the page has been already in binder_alloc_new_buf_locked()
586 next_used_page = (buffer->user_data + buffer_size) & PAGE_MASK; in binder_alloc_new_buf_locked()
587 curr_last_page = PAGE_ALIGN(buffer->user_data + size); in binder_alloc_new_buf_locked()
588 binder_lru_freelist_del(alloc, PAGE_ALIGN(buffer->user_data), in binder_alloc_new_buf_locked()
591 rb_erase(&buffer->rb_node, &alloc->free_buffers); in binder_alloc_new_buf_locked()
592 buffer->free = 0; in binder_alloc_new_buf_locked()
593 buffer->allow_user_free = 0; in binder_alloc_new_buf_locked()
594 binder_insert_allocated_buffer_locked(alloc, buffer); in binder_alloc_new_buf_locked()
595 buffer->async_transaction = is_async; in binder_alloc_new_buf_locked()
596 buffer->oneway_spam_suspect = false; in binder_alloc_new_buf_locked()
603 buffer->oneway_spam_suspect = true; in binder_alloc_new_buf_locked()
609 return buffer; in binder_alloc_new_buf_locked()
635 * binder_alloc_new_buf() - Allocate a new binder buffer
637 * @data_size: size of user data buffer
638 * @offsets_size: user specified buffer offset
640 * @is_async: buffer for async transaction
642 * Allocate a new buffer given the requested sizes. Returns
643 * the kernel version of the buffer pointer. The size allocated
647 * Return: The allocated buffer or %ERR_PTR(-errno) if error
655 struct binder_buffer *buffer, *next; in binder_alloc_new_buf() local
676 /* Preallocate the next buffer */ in binder_alloc_new_buf()
682 buffer = binder_alloc_new_buf_locked(alloc, next, size, is_async); in binder_alloc_new_buf()
683 if (IS_ERR(buffer)) { in binder_alloc_new_buf()
688 buffer->data_size = data_size; in binder_alloc_new_buf()
689 buffer->offsets_size = offsets_size; in binder_alloc_new_buf()
690 buffer->extra_buffers_size = extra_buffers_size; in binder_alloc_new_buf()
691 buffer->pid = current->tgid; in binder_alloc_new_buf()
694 ret = binder_install_buffer_pages(alloc, buffer, size); in binder_alloc_new_buf()
696 binder_alloc_free_buf(alloc, buffer); in binder_alloc_new_buf()
697 buffer = ERR_PTR(ret); in binder_alloc_new_buf()
700 return buffer; in binder_alloc_new_buf()
703 static unsigned long buffer_start_page(struct binder_buffer *buffer) in buffer_start_page() argument
705 return buffer->user_data & PAGE_MASK; in buffer_start_page()
708 static unsigned long prev_buffer_end_page(struct binder_buffer *buffer) in prev_buffer_end_page() argument
710 return (buffer->user_data - 1) & PAGE_MASK; in prev_buffer_end_page()
714 struct binder_buffer *buffer) in binder_delete_free_buffer() argument
718 if (PAGE_ALIGNED(buffer->user_data)) in binder_delete_free_buffer()
721 BUG_ON(alloc->buffers.next == &buffer->entry); in binder_delete_free_buffer()
722 prev = binder_buffer_prev(buffer); in binder_delete_free_buffer()
724 if (prev_buffer_end_page(prev) == buffer_start_page(buffer)) in binder_delete_free_buffer()
727 if (!list_is_last(&buffer->entry, &alloc->buffers)) { in binder_delete_free_buffer()
728 next = binder_buffer_next(buffer); in binder_delete_free_buffer()
729 if (buffer_start_page(next) == buffer_start_page(buffer)) in binder_delete_free_buffer()
733 binder_lru_freelist_add(alloc, buffer_start_page(buffer), in binder_delete_free_buffer()
734 buffer_start_page(buffer) + PAGE_SIZE); in binder_delete_free_buffer()
736 list_del(&buffer->entry); in binder_delete_free_buffer()
737 kfree(buffer); in binder_delete_free_buffer()
741 struct binder_buffer *buffer) in binder_free_buf_locked() argument
745 buffer_size = binder_alloc_buffer_size(alloc, buffer); in binder_free_buf_locked()
747 size = ALIGN(buffer->data_size, sizeof(void *)) + in binder_free_buf_locked()
748 ALIGN(buffer->offsets_size, sizeof(void *)) + in binder_free_buf_locked()
749 ALIGN(buffer->extra_buffers_size, sizeof(void *)); in binder_free_buf_locked()
753 alloc->pid, buffer, size, buffer_size); in binder_free_buf_locked()
755 BUG_ON(buffer->free); in binder_free_buf_locked()
757 BUG_ON(buffer->transaction != NULL); in binder_free_buf_locked()
758 BUG_ON(buffer->user_data < alloc->vm_start); in binder_free_buf_locked()
759 BUG_ON(buffer->user_data > alloc->vm_start + alloc->buffer_size); in binder_free_buf_locked()
761 if (buffer->async_transaction) { in binder_free_buf_locked()
768 binder_lru_freelist_add(alloc, PAGE_ALIGN(buffer->user_data), in binder_free_buf_locked()
769 (buffer->user_data + buffer_size) & PAGE_MASK); in binder_free_buf_locked()
771 rb_erase(&buffer->rb_node, &alloc->allocated_buffers); in binder_free_buf_locked()
772 buffer->free = 1; in binder_free_buf_locked()
773 if (!list_is_last(&buffer->entry, &alloc->buffers)) { in binder_free_buf_locked()
774 struct binder_buffer *next = binder_buffer_next(buffer); in binder_free_buf_locked()
781 if (alloc->buffers.next != &buffer->entry) { in binder_free_buf_locked()
782 struct binder_buffer *prev = binder_buffer_prev(buffer); in binder_free_buf_locked()
785 binder_delete_free_buffer(alloc, buffer); in binder_free_buf_locked()
787 buffer = prev; in binder_free_buf_locked()
790 binder_insert_free_buffer(alloc, buffer); in binder_free_buf_locked()
794 * binder_alloc_get_page() - get kernel pointer for given buffer offset
796 * @buffer: binder buffer to be accessed
797 * @buffer_offset: offset into @buffer data
801 * at @buffer_offset into @buffer->user_data. If @pgoffp is not
805 * to a valid address within the @buffer and that @buffer is
813 struct binder_buffer *buffer, in binder_alloc_get_page() argument
818 (buffer->user_data - alloc->vm_start); in binder_alloc_get_page()
828 * binder_alloc_clear_buf() - zero out buffer
830 * @buffer: binder buffer to be cleared
832 * memset the given buffer to 0
835 struct binder_buffer *buffer) in binder_alloc_clear_buf() argument
837 size_t bytes = binder_alloc_buffer_size(alloc, buffer); in binder_alloc_clear_buf()
845 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_clear_buf()
855 * binder_alloc_free_buf() - free a binder buffer
857 * @buffer: kernel pointer to buffer
859 * Free the buffer allocated via binder_alloc_new_buf()
862 struct binder_buffer *buffer) in binder_alloc_free_buf() argument
872 if (buffer->clear_on_free) { in binder_alloc_free_buf()
873 binder_alloc_clear_buf(alloc, buffer); in binder_alloc_free_buf()
874 buffer->clear_on_free = false; in binder_alloc_free_buf()
877 binder_free_buf_locked(alloc, buffer); in binder_alloc_free_buf()
897 struct binder_buffer *buffer; in binder_alloc_mmap_handler() local
928 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); in binder_alloc_mmap_handler()
929 if (!buffer) { in binder_alloc_mmap_handler()
931 failure_string = "alloc buffer struct"; in binder_alloc_mmap_handler()
935 buffer->user_data = alloc->vm_start; in binder_alloc_mmap_handler()
936 list_add(&buffer->entry, &alloc->buffers); in binder_alloc_mmap_handler()
937 buffer->free = 1; in binder_alloc_mmap_handler()
938 binder_insert_free_buffer(alloc, buffer); in binder_alloc_mmap_handler()
968 struct binder_buffer *buffer; in binder_alloc_deferred_release() local
975 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_deferred_release()
978 BUG_ON(buffer->transaction); in binder_alloc_deferred_release()
980 if (buffer->clear_on_free) { in binder_alloc_deferred_release()
981 binder_alloc_clear_buf(alloc, buffer); in binder_alloc_deferred_release()
982 buffer->clear_on_free = false; in binder_alloc_deferred_release()
984 binder_free_buf_locked(alloc, buffer); in binder_alloc_deferred_release()
989 buffer = list_first_entry(&alloc->buffers, in binder_alloc_deferred_release()
991 WARN_ON(!buffer->free); in binder_alloc_deferred_release()
993 list_del(&buffer->entry); in binder_alloc_deferred_release()
995 kfree(buffer); in binder_alloc_deferred_release()
1033 * binder_alloc_print_allocated() - print buffer info
1037 * Prints information about every buffer associated with
1043 struct binder_buffer *buffer; in binder_alloc_print_allocated() local
1048 buffer = rb_entry(n, struct binder_buffer, rb_node); in binder_alloc_print_allocated()
1049 seq_printf(m, " buffer %d: %lx size %zd:%zd:%zd %s\n", in binder_alloc_print_allocated()
1050 buffer->debug_id, in binder_alloc_print_allocated()
1051 buffer->user_data - alloc->vm_start, in binder_alloc_print_allocated()
1052 buffer->data_size, buffer->offsets_size, in binder_alloc_print_allocated()
1053 buffer->extra_buffers_size, in binder_alloc_print_allocated()
1054 buffer->transaction ? "active" : "delivered"); in binder_alloc_print_allocated()
1277 * check_buffer() - verify that buffer/offset is safe to access
1279 * @buffer: binder buffer to be accessed
1280 * @offset: offset into @buffer data
1284 * @buffer and that the buffer is currently active and not freeable.
1286 * allowed to touch the buffer in two cases:
1288 * 1) when the buffer is being created:
1289 * (buffer->free == 0 && buffer->allow_user_free == 0)
1290 * 2) when the buffer is being torn down:
1291 * (buffer->free == 0 && buffer->transaction == NULL).
1293 * Return: true if the buffer is safe to access
1296 struct binder_buffer *buffer, in check_buffer() argument
1299 size_t buffer_size = binder_alloc_buffer_size(alloc, buffer); in check_buffer()
1304 !buffer->free && in check_buffer()
1305 (!buffer->allow_user_free || !buffer->transaction); in check_buffer()
1311 * @buffer: binder buffer to be accessed
1312 * @buffer_offset: offset into @buffer data
1313 * @from: userspace pointer to source buffer
1316 * Copy bytes from source userspace to target buffer.
1322 struct binder_buffer *buffer, in binder_alloc_copy_user_to_buffer() argument
1327 if (!check_buffer(alloc, buffer, buffer_offset, bytes)) in binder_alloc_copy_user_to_buffer()
1337 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_copy_user_to_buffer()
1354 struct binder_buffer *buffer, in binder_alloc_do_buffer_copy() argument
1360 if (!check_buffer(alloc, buffer, buffer_offset, bytes)) in binder_alloc_do_buffer_copy()
1368 page = binder_alloc_get_page(alloc, buffer, in binder_alloc_do_buffer_copy()
1384 struct binder_buffer *buffer, in binder_alloc_copy_to_buffer() argument
1389 return binder_alloc_do_buffer_copy(alloc, true, buffer, buffer_offset, in binder_alloc_copy_to_buffer()
1395 struct binder_buffer *buffer, in binder_alloc_copy_from_buffer() argument
1399 return binder_alloc_do_buffer_copy(alloc, false, buffer, buffer_offset, in binder_alloc_copy_from_buffer()