uapi: update bpf.h

Upstrean 5.8-rc6 changes.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 4dfcb81bb0c4c89945b17d30731bb6ba82befc71..f21232ed59fdcfefe1e0176da934f848ebf79836 100644 (file)
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -3171,13 +3171,12 @@ union bpf_attr {
  * int bpf_ringbuf_output(void *ringbuf, void *data, u64 size, u64 flags)
  *     Description
  *             Copy *size* bytes from *data* into a ring buffer *ringbuf*.
- *             If BPF_RB_NO_WAKEUP is specified in *flags*, no notification of
- *             new data availability is sent.
- *             IF BPF_RB_FORCE_WAKEUP is specified in *flags*, notification of
- *             new data availability is sent unconditionally.
+ *             If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification
+ *             of new data availability is sent.
+ *             If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification
+ *             of new data availability is sent unconditionally.
  *     Return
- *             0, on success;
- *             < 0, on error.
+ *             0 on success, or a negative error in case of failure.
  *
  * void *bpf_ringbuf_reserve(void *ringbuf, u64 size, u64 flags)
  *     Description
@@ -3189,20 +3188,20 @@ union bpf_attr {
  * void bpf_ringbuf_submit(void *data, u64 flags)
  *     Description
  *             Submit reserved ring buffer sample, pointed to by *data*.
- *             If BPF_RB_NO_WAKEUP is specified in *flags*, no notification of
- *             new data availability is sent.
- *             IF BPF_RB_FORCE_WAKEUP is specified in *flags*, notification of
- *             new data availability is sent unconditionally.
+ *             If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification
+ *             of new data availability is sent.
+ *             If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification
+ *             of new data availability is sent unconditionally.
  *     Return
  *             Nothing. Always succeeds.
  *
  * void bpf_ringbuf_discard(void *data, u64 flags)
  *     Description
  *             Discard reserved ring buffer sample, pointed to by *data*.
- *             If BPF_RB_NO_WAKEUP is specified in *flags*, no notification of
- *             new data availability is sent.
- *             IF BPF_RB_FORCE_WAKEUP is specified in *flags*, notification of
- *             new data availability is sent unconditionally.
+ *             If **BPF_RB_NO_WAKEUP** is specified in *flags*, no notification
+ *             of new data availability is sent.
+ *             If **BPF_RB_FORCE_WAKEUP** is specified in *flags*, notification
+ *             of new data availability is sent unconditionally.
  *     Return
  *             Nothing. Always succeeds.
  *
@@ -3210,16 +3209,18 @@ union bpf_attr {
  *     Description
  *             Query various characteristics of provided ring buffer. What
  *             exactly is queries is determined by *flags*:
- *               - BPF_RB_AVAIL_DATA - amount of data not yet consumed;
- *               - BPF_RB_RING_SIZE - the size of ring buffer;
- *               - BPF_RB_CONS_POS - consumer position (can wrap around);
- *               - BPF_RB_PROD_POS - producer(s) position (can wrap around);
- *             Data returned is just a momentary snapshots of actual values
+ *
+ *             * **BPF_RB_AVAIL_DATA**: Amount of data not yet consumed.
+ *             * **BPF_RB_RING_SIZE**: The size of ring buffer.
+ *             * **BPF_RB_CONS_POS**: Consumer position (can wrap around).
+ *             * **BPF_RB_PROD_POS**: Producer(s) position (can wrap around).
+ *
+ *             Data returned is just a momentary snapshot of actual values
  *             and could be inaccurate, so this facility should be used to
  *             power heuristics and for reporting, not to make 100% correct
  *             calculation.
  *     Return
- *             Requested value, or 0, if flags are not recognized.
+ *             Requested value, or 0, if *flags* are not recognized.
  *
  * int bpf_csum_level(struct sk_buff *skb, u64 level)
  *     Description