STRUCT BINDER_SG_COPY(9)

struct binder_sg_copy(9) 🧚 — scatter-gather data to be copied

okay so bestie, this page is from the Kernel API Manual, and it’s giving very specific kernel-struct energy. We’re talking about struct binder_sg_copy, the little scatter-gather data-to-be-copied icon. 🫶

✨ NAME ✨

struct binder_sg_copy — scatter-gather data to be copied.

🎀 SYNOPSIS 🎀

struct binder_sg_copy {
    binder_size_t offset;
    const void __user *sender_uaddr;
    size_t length;
    struct list_head node;
 };

🫶 Members 🫶

• offset — offset in target buffer.
• sender_uaddr — user address in source buffer.
• length — bytes to copy.
• node — list node.

🌸 Description 🌸

So this struct is used for the sg copy list (sgc) — yes, the scatter-gather copy list, she has a nickname. It gets created and consumed during binder_transaction, and it’s only accessed locally. No locking is necessary, not even a little bit. 💅

The list is ordered by offset, periodt. Keep that in mind because the vibe check depends on it. ✨

👑 SEE ALSO 👑

The kernel file is ./drivers/android/binder.c — that’s where the whole crew lives. Here’s every single bestie in the SEE ALSO squad:

• binder_proc_lock(9)
• binder_proc_unlock(9)
• binder_inner_proc_lock(9)
• binder_inner_proc_unlock(9)
• binder_node_lock(9)
• binder_node_unlock(9)
• binder_node_inner_lock(9)
• binder_node_inner_unlock(9)
• binder_worklist_empty(9)
• binder_enqueue_work_ilocked(9)
• binder_enqueue_deferred_thread_work_ilocked(9)
• binder_enqueue_thread_work_ilocked(9)
• binder_enqueue_thread_work(9)
• binder_dequeue_work(9)
• binder_select_thread_ilocked(9)
• binder_wakeup_thread_ilocked(9)
• binder_inc_node_tmpref(9)
• binder_dec_node_tmpref(9)
• binder_get_ref_for_node_olocked(9)
• binder_inc_ref_olocked(9)
• binder_dec_ref_olocked(9)
• binder_get_node_from_ref(9)
• binder_free_ref(9)
• binder_update_ref_for_handle(9)
• binder_dec_ref_for_handle(9)
• binder_inc_ref_for_node(9)
• binder_thread_dec_tmpref(9)
• binder_proc_dec_tmpref(9)
• binder_get_txn_from(9)
• binder_get_txn_from_and_acq_inner(9)
• binder_free_txn_fixups(9)
• binder_cleanup_transaction(9)
• binder_get_object(9)
• binder_validate_ptr(9)
• binder_validate_fixup(9)
• struct binder_task_work_cb(9)
• binder_do_fd_close(9)
• binder_deferred_fd_close(9)
• struct binder_ptr_fixup(9)
• binder_do_deferred_txn_copies(9)
• binder_cleanup_deferred_txn_lists(9)
• binder_defer_copy(9)
• binder_add_fixup(9)
• binder_can_update_transaction(9)
• binder_find_outdated_transaction_ilocked(9)
• binder_proc_transaction(9)
• binder_get_node_refs_for_txn(9)
• binder_netlink_report(9)
• binder_free_buf(9)
• binder_apply_fd_fixups(9)
• print_next_binder_node_ilocked(9)

mwah 💋 this page says it’s from ./drivers/android, dated October 2026, and it’s still serving struct binder_sg_copy(9) main-character energy. byeee 🦋