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Diffstat (limited to 'tools/lib/bpf/xsk.c')
-rw-r--r--tools/lib/bpf/xsk.c86
1 files changed, 48 insertions, 38 deletions
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c
index 680e63066cf3..842c4fd55859 100644
--- a/tools/lib/bpf/xsk.c
+++ b/tools/lib/bpf/xsk.c
@@ -74,23 +74,6 @@ struct xsk_nl_info {
int fd;
};
-/* For 32-bit systems, we need to use mmap2 as the offsets are 64-bit.
- * Unfortunately, it is not part of glibc.
- */
-static inline void *xsk_mmap(void *addr, size_t length, int prot, int flags,
- int fd, __u64 offset)
-{
-#ifdef __NR_mmap2
- unsigned int page_shift = __builtin_ffs(getpagesize()) - 1;
- long ret = syscall(__NR_mmap2, addr, length, prot, flags, fd,
- (off_t)(offset >> page_shift));
-
- return (void *)ret;
-#else
- return mmap(addr, length, prot, flags, fd, offset);
-#endif
-}
-
int xsk_umem__fd(const struct xsk_umem *umem)
{
return umem ? umem->fd : -EINVAL;
@@ -116,6 +99,7 @@ static void xsk_set_umem_config(struct xsk_umem_config *cfg,
cfg->comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
cfg->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
cfg->frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM;
+ cfg->flags = XSK_UMEM__DEFAULT_FLAGS;
return;
}
@@ -123,6 +107,7 @@ static void xsk_set_umem_config(struct xsk_umem_config *cfg,
cfg->comp_size = usr_cfg->comp_size;
cfg->frame_size = usr_cfg->frame_size;
cfg->frame_headroom = usr_cfg->frame_headroom;
+ cfg->flags = usr_cfg->flags;
}
static int xsk_set_xdp_socket_config(struct xsk_socket_config *cfg,
@@ -149,9 +134,10 @@ static int xsk_set_xdp_socket_config(struct xsk_socket_config *cfg,
return 0;
}
-int xsk_umem__create(struct xsk_umem **umem_ptr, void *umem_area, __u64 size,
- struct xsk_ring_prod *fill, struct xsk_ring_cons *comp,
- const struct xsk_umem_config *usr_config)
+int xsk_umem__create_v0_0_4(struct xsk_umem **umem_ptr, void *umem_area,
+ __u64 size, struct xsk_ring_prod *fill,
+ struct xsk_ring_cons *comp,
+ const struct xsk_umem_config *usr_config)
{
struct xdp_mmap_offsets off;
struct xdp_umem_reg mr;
@@ -182,6 +168,7 @@ int xsk_umem__create(struct xsk_umem **umem_ptr, void *umem_area, __u64 size,
mr.len = size;
mr.chunk_size = umem->config.frame_size;
mr.headroom = umem->config.frame_headroom;
+ mr.flags = umem->config.flags;
err = setsockopt(umem->fd, SOL_XDP, XDP_UMEM_REG, &mr, sizeof(mr));
if (err) {
@@ -210,10 +197,9 @@ int xsk_umem__create(struct xsk_umem **umem_ptr, void *umem_area, __u64 size,
goto out_socket;
}
- map = xsk_mmap(NULL, off.fr.desc +
- umem->config.fill_size * sizeof(__u64),
- PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
- umem->fd, XDP_UMEM_PGOFF_FILL_RING);
+ map = mmap(NULL, off.fr.desc + umem->config.fill_size * sizeof(__u64),
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, umem->fd,
+ XDP_UMEM_PGOFF_FILL_RING);
if (map == MAP_FAILED) {
err = -errno;
goto out_socket;
@@ -224,13 +210,13 @@ int xsk_umem__create(struct xsk_umem **umem_ptr, void *umem_area, __u64 size,
fill->size = umem->config.fill_size;
fill->producer = map + off.fr.producer;
fill->consumer = map + off.fr.consumer;
+ fill->flags = map + off.fr.flags;
fill->ring = map + off.fr.desc;
fill->cached_cons = umem->config.fill_size;
- map = xsk_mmap(NULL,
- off.cr.desc + umem->config.comp_size * sizeof(__u64),
- PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
- umem->fd, XDP_UMEM_PGOFF_COMPLETION_RING);
+ map = mmap(NULL, off.cr.desc + umem->config.comp_size * sizeof(__u64),
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, umem->fd,
+ XDP_UMEM_PGOFF_COMPLETION_RING);
if (map == MAP_FAILED) {
err = -errno;
goto out_mmap;
@@ -241,6 +227,7 @@ int xsk_umem__create(struct xsk_umem **umem_ptr, void *umem_area, __u64 size,
comp->size = umem->config.comp_size;
comp->producer = map + off.cr.producer;
comp->consumer = map + off.cr.consumer;
+ comp->flags = map + off.cr.flags;
comp->ring = map + off.cr.desc;
*umem_ptr = umem;
@@ -255,6 +242,29 @@ out_umem_alloc:
return err;
}
+struct xsk_umem_config_v1 {
+ __u32 fill_size;
+ __u32 comp_size;
+ __u32 frame_size;
+ __u32 frame_headroom;
+};
+
+int xsk_umem__create_v0_0_2(struct xsk_umem **umem_ptr, void *umem_area,
+ __u64 size, struct xsk_ring_prod *fill,
+ struct xsk_ring_cons *comp,
+ const struct xsk_umem_config *usr_config)
+{
+ struct xsk_umem_config config;
+
+ memcpy(&config, usr_config, sizeof(struct xsk_umem_config_v1));
+ config.flags = 0;
+
+ return xsk_umem__create_v0_0_4(umem_ptr, umem_area, size, fill, comp,
+ &config);
+}
+asm(".symver xsk_umem__create_v0_0_2, xsk_umem__create@LIBBPF_0.0.2");
+asm(".symver xsk_umem__create_v0_0_4, xsk_umem__create@@LIBBPF_0.0.4");
+
static int xsk_load_xdp_prog(struct xsk_socket *xsk)
{
static const int log_buf_size = 16 * 1024;
@@ -550,11 +560,10 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
}
if (rx) {
- rx_map = xsk_mmap(NULL, off.rx.desc +
- xsk->config.rx_size * sizeof(struct xdp_desc),
- PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_POPULATE,
- xsk->fd, XDP_PGOFF_RX_RING);
+ rx_map = mmap(NULL, off.rx.desc +
+ xsk->config.rx_size * sizeof(struct xdp_desc),
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
+ xsk->fd, XDP_PGOFF_RX_RING);
if (rx_map == MAP_FAILED) {
err = -errno;
goto out_socket;
@@ -564,16 +573,16 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
rx->size = xsk->config.rx_size;
rx->producer = rx_map + off.rx.producer;
rx->consumer = rx_map + off.rx.consumer;
+ rx->flags = rx_map + off.rx.flags;
rx->ring = rx_map + off.rx.desc;
}
xsk->rx = rx;
if (tx) {
- tx_map = xsk_mmap(NULL, off.tx.desc +
- xsk->config.tx_size * sizeof(struct xdp_desc),
- PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_POPULATE,
- xsk->fd, XDP_PGOFF_TX_RING);
+ tx_map = mmap(NULL, off.tx.desc +
+ xsk->config.tx_size * sizeof(struct xdp_desc),
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
+ xsk->fd, XDP_PGOFF_TX_RING);
if (tx_map == MAP_FAILED) {
err = -errno;
goto out_mmap_rx;
@@ -583,6 +592,7 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
tx->size = xsk->config.tx_size;
tx->producer = tx_map + off.tx.producer;
tx->consumer = tx_map + off.tx.consumer;
+ tx->flags = tx_map + off.tx.flags;
tx->ring = tx_map + off.tx.desc;
tx->cached_cons = xsk->config.tx_size;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.