kernel/bpf/ringbuf.c

20 /* consumer page and producer page */
33 	/* For user-space producer ring buffers, an atomic_t busy bit is used
35 	 * the spinlock that is used for kernel-producer ring buffers. This is
49 	/* Consumer and producer counters are put into separate pages to
56 	 * Kernel-producer
58 	 * The producer position and data pages are mapped as r/o in
63 	 * User-space producer
157  * take into account few extra pages for consumer/producer pages and
285 			 * and allow writable mappings to both the producer  in ringbuf_map_mmap_user()
430 	/* check for out of ringbuf space by ensuring producer position  in __bpf_ringbuf_reserve()
663 	/* Synchronizes with smp_store_release() in user-space producer. */  in __bpf_user_ringbuf_peek()
674 	/* Synchronizes with smp_store_release() in user-space producer. */  in __bpf_user_ringbuf_peek()
680 	/* The sample must fit within the region advertised by the producer position. */  in __bpf_user_ringbuf_peek()
722 	 /* Synchronizes with smp_load_acquire() in user-space producer. */  in __bpf_user_ringbuf_sample_release()
771 	 * storing of any rb consumer or producer positions.  in BPF_CALL_4()