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libbpf: Replace size_t with __u32 in xsk interfaces

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Replace size_t with __u32 in the xsk interfaces that contain this.
There is no reason to have size_t since the internal variable that
is manipulated is a __u32. The following APIs are affected:

__u32 xsk_ring_prod__reserve(struct xsk_ring_prod *prod, __u32 nb, __u32 *idx)
void xsk_ring_prod__submit(struct xsk_ring_prod *prod, __u32 nb)
__u32 xsk_ring_cons__peek(struct xsk_ring_cons *cons, __u32 nb, __u32 *idx)
void xsk_ring_cons__cancel(struct xsk_ring_cons *cons, __u32 nb)
void xsk_ring_cons__release(struct xsk_ring_cons *cons, __u32 nb)

The "nb" variable and the return values have been changed from size_t
to __u32.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/1606383455-8243-1-git-send-email-magnus.karlsson@gmail.com
This commit is contained in:
Magnus Karlsson 2020-11-26 10:37:35 +01:00 committed by Daniel Borkmann
parent 830382e4cc
commit 105c4e75fe
1 changed files with 6 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

15
tools/lib/bpf/xsk.h
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@ -113,8 +113,7 @@ static inline __u32 xsk_cons_nb_avail(struct xsk_ring_cons *r, __u32 nb)
return (entries > nb) ? nb : entries;
}
static inline size_t xsk_ring_prod__reserve(struct xsk_ring_prod *prod,
size_t nb, __u32 *idx)
static inline __u32 xsk_ring_prod__reserve(struct xsk_ring_prod *prod, __u32 nb, __u32 *idx)
{
if (xsk_prod_nb_free(prod, nb) < nb)
return 0;
@ -125,7 +124,7 @@ static inline size_t xsk_ring_prod__reserve(struct xsk_ring_prod *prod,
return nb;
}
static inline void xsk_ring_prod__submit(struct xsk_ring_prod *prod, size_t nb)
static inline void xsk_ring_prod__submit(struct xsk_ring_prod *prod, __u32 nb)
{
/* Make sure everything has been written to the ring before indicating
* this to the kernel by writing the producer pointer.
@ -135,10 +134,9 @@ static inline void xsk_ring_prod__submit(struct xsk_ring_prod *prod, size_t nb)
*prod->producer += nb;
}
static inline size_t xsk_ring_cons__peek(struct xsk_ring_cons *cons,
size_t nb, __u32 *idx)
static inline __u32 xsk_ring_cons__peek(struct xsk_ring_cons *cons, __u32 nb, __u32 *idx)
{
size_t entries = xsk_cons_nb_avail(cons, nb);
__u32 entries = xsk_cons_nb_avail(cons, nb);
if (entries > 0) {
/* Make sure we do not speculatively read the data before
@ -153,13 +151,12 @@ static inline size_t xsk_ring_cons__peek(struct xsk_ring_cons *cons,
return entries;
}
static inline void xsk_ring_cons__cancel(struct xsk_ring_cons *cons,
size_t nb)
static inline void xsk_ring_cons__cancel(struct xsk_ring_cons *cons, __u32 nb)
{
cons->cached_cons -= nb;
}
static inline void xsk_ring_cons__release(struct xsk_ring_cons *cons, size_t nb)
static inline void xsk_ring_cons__release(struct xsk_ring_cons *cons, __u32 nb)
{
/* Make sure data has been read before indicating we are done
* with the entries by updating the consumer pointer.