summaryrefslogtreecommitdiff
path: root/tools/lib/bpf
diff options
context:
space:
mode:
Diffstat (limited to 'tools/lib/bpf')
-rw-r--r--tools/lib/bpf/Makefile2
-rw-r--r--tools/lib/bpf/btf_dump.c2
-rw-r--r--tools/lib/bpf/libbpf.c3
-rw-r--r--tools/lib/bpf/netlink.c2
-rw-r--r--tools/lib/bpf/ringbuf.c2
-rw-r--r--tools/lib/bpf/xsk.c63
6 files changed, 47 insertions, 27 deletions
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index 887a494ad5fc..e9eb6a6e80d2 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -215,7 +215,7 @@ define do_install
if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
fi; \
- $(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR_SQ)$2'
+ $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
endef
install_lib: all_cmd
diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c
index 2f9d685bd522..0911aea4cdbe 100644
--- a/tools/lib/bpf/btf_dump.c
+++ b/tools/lib/bpf/btf_dump.c
@@ -462,7 +462,7 @@ static int btf_dump_order_type(struct btf_dump *d, __u32 id, bool through_ptr)
return err;
case BTF_KIND_ARRAY:
- return btf_dump_order_type(d, btf_array(t)->type, through_ptr);
+ return btf_dump_order_type(d, btf_array(t)->type, false);
case BTF_KIND_STRUCT:
case BTF_KIND_UNION: {
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index d43cc3f29dae..4181d178ee7b 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1181,7 +1181,8 @@ static int bpf_object__elf_init(struct bpf_object *obj)
if (!elf_rawdata(elf_getscn(obj->efile.elf, obj->efile.shstrndx), NULL)) {
pr_warn("elf: failed to get section names strings from %s: %s\n",
obj->path, elf_errmsg(-1));
- return -LIBBPF_ERRNO__FORMAT;
+ err = -LIBBPF_ERRNO__FORMAT;
+ goto errout;
}
/* Old LLVM set e_machine to EM_NONE */
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c
index 4dd73de00b6f..d2cb28e9ef52 100644
--- a/tools/lib/bpf/netlink.c
+++ b/tools/lib/bpf/netlink.c
@@ -40,7 +40,7 @@ static int libbpf_netlink_open(__u32 *nl_pid)
memset(&sa, 0, sizeof(sa));
sa.nl_family = AF_NETLINK;
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
if (sock < 0)
return -errno;
diff --git a/tools/lib/bpf/ringbuf.c b/tools/lib/bpf/ringbuf.c
index 8caaafe7e312..e7a8d847161f 100644
--- a/tools/lib/bpf/ringbuf.c
+++ b/tools/lib/bpf/ringbuf.c
@@ -227,7 +227,7 @@ static int ringbuf_process_ring(struct ring* r)
if ((len & BPF_RINGBUF_DISCARD_BIT) == 0) {
sample = (void *)len_ptr + BPF_RINGBUF_HDR_SZ;
err = r->sample_cb(r->ctx, sample, len);
- if (err) {
+ if (err < 0) {
/* update consumer pos and bail out */
smp_store_release(r->consumer_pos,
cons_pos);
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c
index ffbb588724d8..007fe5d59438 100644
--- a/tools/lib/bpf/xsk.c
+++ b/tools/lib/bpf/xsk.c
@@ -59,6 +59,8 @@ struct xsk_umem {
int fd;
int refcount;
struct list_head ctx_list;
+ bool rx_ring_setup_done;
+ bool tx_ring_setup_done;
};
struct xsk_ctx {
@@ -610,15 +612,16 @@ static int xsk_lookup_bpf_maps(struct xsk_socket *xsk)
if (fd < 0)
continue;
+ memset(&map_info, 0, map_len);
err = bpf_obj_get_info_by_fd(fd, &map_info, &map_len);
if (err) {
close(fd);
continue;
}
- if (!strcmp(map_info.name, "xsks_map")) {
+ if (!strncmp(map_info.name, "xsks_map", sizeof(map_info.name))) {
ctx->xsks_map_fd = fd;
- continue;
+ break;
}
close(fd);
@@ -742,26 +745,30 @@ static struct xsk_ctx *xsk_get_ctx(struct xsk_umem *umem, int ifindex,
return NULL;
}
-static void xsk_put_ctx(struct xsk_ctx *ctx)
+static void xsk_put_ctx(struct xsk_ctx *ctx, bool unmap)
{
struct xsk_umem *umem = ctx->umem;
struct xdp_mmap_offsets off;
int err;
- if (--ctx->refcount == 0) {
- err = xsk_get_mmap_offsets(umem->fd, &off);
- if (!err) {
- munmap(ctx->fill->ring - off.fr.desc,
- off.fr.desc + umem->config.fill_size *
- sizeof(__u64));
- munmap(ctx->comp->ring - off.cr.desc,
- off.cr.desc + umem->config.comp_size *
- sizeof(__u64));
- }
+ if (--ctx->refcount)
+ return;
- list_del(&ctx->list);
- free(ctx);
- }
+ if (!unmap)
+ goto out_free;
+
+ err = xsk_get_mmap_offsets(umem->fd, &off);
+ if (err)
+ goto out_free;
+
+ munmap(ctx->fill->ring - off.fr.desc, off.fr.desc + umem->config.fill_size *
+ sizeof(__u64));
+ munmap(ctx->comp->ring - off.cr.desc, off.cr.desc + umem->config.comp_size *
+ sizeof(__u64));
+
+out_free:
+ list_del(&ctx->list);
+ free(ctx);
}
static struct xsk_ctx *xsk_create_ctx(struct xsk_socket *xsk,
@@ -796,8 +803,6 @@ static struct xsk_ctx *xsk_create_ctx(struct xsk_socket *xsk,
memcpy(ctx->ifname, ifname, IFNAMSIZ - 1);
ctx->ifname[IFNAMSIZ - 1] = '\0';
- umem->fill_save = NULL;
- umem->comp_save = NULL;
ctx->fill = fill;
ctx->comp = comp;
list_add(&ctx->list, &umem->ctx_list);
@@ -847,6 +852,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
struct xsk_ring_cons *comp,
const struct xsk_socket_config *usr_config)
{
+ bool unmap, rx_setup_done = false, tx_setup_done = false;
void *rx_map = NULL, *tx_map = NULL;
struct sockaddr_xdp sxdp = {};
struct xdp_mmap_offsets off;
@@ -857,6 +863,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
if (!umem || !xsk_ptr || !(rx || tx))
return -EFAULT;
+ unmap = umem->fill_save != fill;
+
xsk = calloc(1, sizeof(*xsk));
if (!xsk)
return -ENOMEM;
@@ -880,6 +888,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
}
} else {
xsk->fd = umem->fd;
+ rx_setup_done = umem->rx_ring_setup_done;
+ tx_setup_done = umem->tx_ring_setup_done;
}
ctx = xsk_get_ctx(umem, ifindex, queue_id);
@@ -898,7 +908,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
}
xsk->ctx = ctx;
- if (rx) {
+ if (rx && !rx_setup_done) {
err = setsockopt(xsk->fd, SOL_XDP, XDP_RX_RING,
&xsk->config.rx_size,
sizeof(xsk->config.rx_size));
@@ -906,8 +916,10 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
err = -errno;
goto out_put_ctx;
}
+ if (xsk->fd == umem->fd)
+ umem->rx_ring_setup_done = true;
}
- if (tx) {
+ if (tx && !tx_setup_done) {
err = setsockopt(xsk->fd, SOL_XDP, XDP_TX_RING,
&xsk->config.tx_size,
sizeof(xsk->config.tx_size));
@@ -915,6 +927,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
err = -errno;
goto out_put_ctx;
}
+ if (xsk->fd == umem->fd)
+ umem->rx_ring_setup_done = true;
}
err = xsk_get_mmap_offsets(xsk->fd, &off);
@@ -993,6 +1007,8 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
}
*xsk_ptr = xsk;
+ umem->fill_save = NULL;
+ umem->comp_save = NULL;
return 0;
out_mmap_tx:
@@ -1004,7 +1020,7 @@ out_mmap_rx:
munmap(rx_map, off.rx.desc +
xsk->config.rx_size * sizeof(struct xdp_desc));
out_put_ctx:
- xsk_put_ctx(ctx);
+ xsk_put_ctx(ctx, unmap);
out_socket:
if (--umem->refcount)
close(xsk->fd);
@@ -1018,6 +1034,9 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
struct xsk_ring_cons *rx, struct xsk_ring_prod *tx,
const struct xsk_socket_config *usr_config)
{
+ if (!umem)
+ return -EFAULT;
+
return xsk_socket__create_shared(xsk_ptr, ifname, queue_id, umem,
rx, tx, umem->fill_save,
umem->comp_save, usr_config);
@@ -1067,7 +1086,7 @@ void xsk_socket__delete(struct xsk_socket *xsk)
}
}
- xsk_put_ctx(ctx);
+ xsk_put_ctx(ctx, true);
umem->refcount--;
/* Do not close an fd that also has an associated umem connected
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 07:31:23 +0300