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docs, af_xdp: Consistent indentation in examples 

Examples in this document use all kinds of indentation from 3 to 5
spaces and even mixed with tabs. Making them all even and equal to
4 spaces.

Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20210622185647.3705104-1-i.maximets@ovn.org
This commit is contained in:
Ilya Maximets 2021-06-22 20:56:47 +02:00 committed by Daniel Borkmann
parent ee62a5c6bb
commit 4b9718b5a2
1 changed files with 16 additions and 16 deletions
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32
Documentation/networking/af_xdp.rst
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@ -290,19 +290,19 @@ round-robin example of distributing packets is shown below:
#define MAX_SOCKS 16 #define MAX_SOCKS 16
struct { struct {
__uint(type, BPF_MAP_TYPE_XSKMAP); __uint(type, BPF_MAP_TYPE_XSKMAP);
__uint(max_entries, MAX_SOCKS); __uint(max_entries, MAX_SOCKS);
__uint(key_size, sizeof(int)); __uint(key_size, sizeof(int));
__uint(value_size, sizeof(int)); __uint(value_size, sizeof(int));
} xsks_map SEC(".maps"); } xsks_map SEC(".maps");
static unsigned int rr; static unsigned int rr;
SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx) SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx)
{ {
rr = (rr + 1) & (MAX_SOCKS - 1); rr = (rr + 1) & (MAX_SOCKS - 1);
return bpf_redirect_map(&xsks_map, rr, XDP_DROP); return bpf_redirect_map(&xsks_map, rr, XDP_DROP);
} }
Note, that since there is only a single set of FILL and COMPLETION Note, that since there is only a single set of FILL and COMPLETION
@ -379,7 +379,7 @@ would look like this for the TX path:
.. code-block:: c .. code-block:: c
if (xsk_ring_prod__needs_wakeup(&my_tx_ring)) if (xsk_ring_prod__needs_wakeup(&my_tx_ring))
sendto(xsk_socket__fd(xsk_handle), NULL, 0, MSG_DONTWAIT, NULL, 0); sendto(xsk_socket__fd(xsk_handle), NULL, 0, MSG_DONTWAIT, NULL, 0);
I.e., only use the syscall if the flag is set. I.e., only use the syscall if the flag is set.
@ -442,9 +442,9 @@ purposes. The supported statistics are shown below:
.. code-block:: c .. code-block:: c
struct xdp_statistics { struct xdp_statistics {
__u64 rx_dropped; /* Dropped for reasons other than invalid desc */ __u64 rx_dropped; /* Dropped for reasons other than invalid desc */
__u64 rx_invalid_descs; /* Dropped due to invalid descriptor */ __u64 rx_invalid_descs; /* Dropped due to invalid descriptor */
__u64 tx_invalid_descs; /* Dropped due to invalid descriptor */ __u64 tx_invalid_descs; /* Dropped due to invalid descriptor */
}; };
XDP_OPTIONS getsockopt XDP_OPTIONS getsockopt
@ -483,15 +483,15 @@ like this:
.. code-block:: c .. code-block:: c
// struct xdp_rxtx_ring { // struct xdp_rxtx_ring {
// __u32 *producer; // __u32 *producer;
// __u32 *consumer; // __u32 *consumer;
// struct xdp_desc *desc; // struct xdp_desc *desc;
// }; // };
// struct xdp_umem_ring { // struct xdp_umem_ring {
// __u32 *producer; // __u32 *producer;
// __u32 *consumer; // __u32 *consumer;
// __u64 *desc; // __u64 *desc;
// }; // };
// typedef struct xdp_rxtx_ring RING; // typedef struct xdp_rxtx_ring RING;