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-rw-r--r--net/bpf/test_run.c8
-rw-r--r--net/core/filter.c4
-rw-r--r--net/core/xdp.c51
-rw-r--r--net/ethtool/channels.c2
-rw-r--r--net/ethtool/ioctl.c2
-rw-r--r--net/ipv4/af_inet.c8
-rw-r--r--net/ipv6/af_inet6.c9
-rw-r--r--net/xdp/Makefile3
-rw-r--r--net/xdp/xdp_umem.c55
-rw-r--r--net/xdp/xdp_umem.h2
-rw-r--r--net/xdp/xsk.c204
-rw-r--r--net/xdp/xsk.h30
-rw-r--r--net/xdp/xsk_buff_pool.c336
-rw-r--r--net/xdp/xsk_diag.c2
-rw-r--r--net/xdp/xsk_queue.c63
-rw-r--r--net/xdp/xsk_queue.h117
-rw-r--r--net/xdp/xskmap.c267
17 files changed, 789 insertions, 374 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 30ba7d38941d..bfd4ccd80847 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -160,16 +160,20 @@ static void *bpf_test_init(const union bpf_attr *kattr, u32 size,
u32 headroom, u32 tailroom)
{
void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
+ u32 user_size = kattr->test.data_size_in;
void *data;
if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom)
return ERR_PTR(-EINVAL);
+ if (user_size > size)
+ return ERR_PTR(-EMSGSIZE);
+
data = kzalloc(size + headroom + tailroom, GFP_USER);
if (!data)
return ERR_PTR(-ENOMEM);
- if (copy_from_user(data + headroom, data_in, size)) {
+ if (copy_from_user(data + headroom, data_in, user_size)) {
kfree(data);
return ERR_PTR(-EFAULT);
}
@@ -486,8 +490,6 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
/* XDP have extra tailroom as (most) drivers use full page */
max_data_sz = 4096 - headroom - tailroom;
- if (size > max_data_sz)
- return -EINVAL;
data = bpf_test_init(kattr, max_data_sz, headroom, tailroom);
if (IS_ERR(data))
diff --git a/net/core/filter.c b/net/core/filter.c
index 822d662f97ef..bd2853d23b50 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -7049,6 +7049,8 @@ static bool sock_addr_is_valid_access(int off, int size,
switch (prog->expected_attach_type) {
case BPF_CGROUP_INET4_BIND:
case BPF_CGROUP_INET4_CONNECT:
+ case BPF_CGROUP_INET4_GETPEERNAME:
+ case BPF_CGROUP_INET4_GETSOCKNAME:
case BPF_CGROUP_UDP4_SENDMSG:
case BPF_CGROUP_UDP4_RECVMSG:
break;
@@ -7060,6 +7062,8 @@ static bool sock_addr_is_valid_access(int off, int size,
switch (prog->expected_attach_type) {
case BPF_CGROUP_INET6_BIND:
case BPF_CGROUP_INET6_CONNECT:
+ case BPF_CGROUP_INET6_GETPEERNAME:
+ case BPF_CGROUP_INET6_GETSOCKNAME:
case BPF_CGROUP_UDP6_SENDMSG:
case BPF_CGROUP_UDP6_RECVMSG:
break;
diff --git a/net/core/xdp.c b/net/core/xdp.c
index 490b8f5fa8ee..90f44f382115 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -17,6 +17,7 @@
#include <net/xdp.h>
#include <net/xdp_priv.h> /* struct xdp_mem_allocator */
#include <trace/events/xdp.h>
+#include <net/xdp_sock_drv.h>
#define REG_STATE_NEW 0x0
#define REG_STATE_REGISTERED 0x1
@@ -109,27 +110,6 @@ static void mem_allocator_disconnect(void *allocator)
mutex_unlock(&mem_id_lock);
}
-static void mem_id_disconnect(int id)
-{
- struct xdp_mem_allocator *xa;
-
- mutex_lock(&mem_id_lock);
-
- xa = rhashtable_lookup_fast(mem_id_ht, &id, mem_id_rht_params);
- if (!xa) {
- mutex_unlock(&mem_id_lock);
- WARN(1, "Request remove non-existing id(%d), driver bug?", id);
- return;
- }
-
- trace_mem_disconnect(xa);
-
- if (!rhashtable_remove_fast(mem_id_ht, &xa->node, mem_id_rht_params))
- call_rcu(&xa->rcu, __xdp_mem_allocator_rcu_free);
-
- mutex_unlock(&mem_id_lock);
-}
-
void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
{
struct xdp_mem_allocator *xa;
@@ -143,9 +123,6 @@ void xdp_rxq_info_unreg_mem_model(struct xdp_rxq_info *xdp_rxq)
if (id == 0)
return;
- if (xdp_rxq->mem.type == MEM_TYPE_ZERO_COPY)
- return mem_id_disconnect(id);
-
if (xdp_rxq->mem.type == MEM_TYPE_PAGE_POOL) {
rcu_read_lock();
xa = rhashtable_lookup(mem_id_ht, &id, mem_id_rht_params);
@@ -301,7 +278,7 @@ int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
xdp_rxq->mem.type = type;
if (!allocator) {
- if (type == MEM_TYPE_PAGE_POOL || type == MEM_TYPE_ZERO_COPY)
+ if (type == MEM_TYPE_PAGE_POOL)
return -EINVAL; /* Setup time check page_pool req */
return 0;
}
@@ -358,10 +335,11 @@ EXPORT_SYMBOL_GPL(xdp_rxq_info_reg_mem_model);
* scenarios (e.g. queue full), it is possible to return the xdp_frame
* while still leveraging this protection. The @napi_direct boolean
* is used for those calls sites. Thus, allowing for faster recycling
- * of xdp_frames/pages in those cases.
+ * of xdp_frames/pages in those cases. This path is never used by the
+ * MEM_TYPE_XSK_BUFF_POOL memory type, so it's explicitly not part of
+ * the switch-statement.
*/
-static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
- unsigned long handle)
+static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct)
{
struct xdp_mem_allocator *xa;
struct page *page;
@@ -383,36 +361,29 @@ static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
page = virt_to_page(data); /* Assumes order0 page*/
put_page(page);
break;
- case MEM_TYPE_ZERO_COPY:
- /* NB! Only valid from an xdp_buff! */
- rcu_read_lock();
- /* mem->id is valid, checked in xdp_rxq_info_reg_mem_model() */
- xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params);
- xa->zc_alloc->free(xa->zc_alloc, handle);
- rcu_read_unlock();
default:
/* Not possible, checked in xdp_rxq_info_reg_mem_model() */
+ WARN(1, "Incorrect XDP memory type (%d) usage", mem->type);
break;
}
}
void xdp_return_frame(struct xdp_frame *xdpf)
{
- __xdp_return(xdpf->data, &xdpf->mem, false, 0);
+ __xdp_return(xdpf->data, &xdpf->mem, false);
}
EXPORT_SYMBOL_GPL(xdp_return_frame);
void xdp_return_frame_rx_napi(struct xdp_frame *xdpf)
{
- __xdp_return(xdpf->data, &xdpf->mem, true, 0);
+ __xdp_return(xdpf->data, &xdpf->mem, true);
}
EXPORT_SYMBOL_GPL(xdp_return_frame_rx_napi);
void xdp_return_buff(struct xdp_buff *xdp)
{
- __xdp_return(xdp->data, &xdp->rxq->mem, true, xdp->handle);
+ __xdp_return(xdp->data, &xdp->rxq->mem, true);
}
-EXPORT_SYMBOL_GPL(xdp_return_buff);
/* Only called for MEM_TYPE_PAGE_POOL see xdp.h */
void __xdp_release_frame(void *data, struct xdp_mem_info *mem)
@@ -493,7 +464,7 @@ struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp)
xdpf->metasize = metasize;
xdpf->mem.type = MEM_TYPE_PAGE_ORDER0;
- xdp_return_buff(xdp);
+ xsk_buff_free(xdp);
return xdpf;
}
EXPORT_SYMBOL_GPL(xdp_convert_zc_to_xdp_frame);
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 3aa4975919d7..9ef54cdcf662 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-#include <net/xdp_sock.h>
+#include <net/xdp_sock_drv.h>
#include "netlink.h"
#include "common.h"
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index eeb1137a3f23..31e0b4e88a9d 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -24,7 +24,7 @@
#include <linux/sched/signal.h>
#include <linux/net.h>
#include <net/devlink.h>
-#include <net/xdp_sock.h>
+#include <net/xdp_sock_drv.h>
#include <net/flow_offload.h>
#include <linux/ethtool_netlink.h>
#include <generated/utsrelease.h>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c35a8b2e0499..02aa5cb3a4fd 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -756,12 +756,11 @@ do_err:
}
EXPORT_SYMBOL(inet_accept);
-
/*
* This does both peername and sockname.
*/
int inet_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
+ int peer)
{
struct sock *sk = sock->sk;
struct inet_sock *inet = inet_sk(sk);
@@ -782,6 +781,11 @@ int inet_getname(struct socket *sock, struct sockaddr *uaddr,
sin->sin_port = inet->inet_sport;
sin->sin_addr.s_addr = addr;
}
+ if (cgroup_bpf_enabled)
+ BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
+ peer ? BPF_CGROUP_INET4_GETPEERNAME :
+ BPF_CGROUP_INET4_GETSOCKNAME,
+ NULL);
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
return sizeof(*sin);
}
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index b69496eaf922..0625a97a8894 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -505,9 +505,8 @@ EXPORT_SYMBOL_GPL(inet6_destroy_sock);
/*
* This does both peername and sockname.
*/
-
int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
+ int peer)
{
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
struct sock *sk = sock->sk;
@@ -532,9 +531,13 @@ int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
sin->sin6_addr = np->saddr;
else
sin->sin6_addr = sk->sk_v6_rcv_saddr;
-
sin->sin6_port = inet->inet_sport;
}
+ if (cgroup_bpf_enabled)
+ BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
+ peer ? BPF_CGROUP_INET6_GETPEERNAME :
+ BPF_CGROUP_INET6_GETSOCKNAME,
+ NULL);
sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
sk->sk_bound_dev_if);
return sizeof(*sin);
diff --git a/net/xdp/Makefile b/net/xdp/Makefile
index 71e2bdafb2ce..30cdc4315f42 100644
--- a/net/xdp/Makefile
+++ b/net/xdp/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
-obj-$(CONFIG_XDP_SOCKETS) += xsk.o xdp_umem.o xsk_queue.o
+obj-$(CONFIG_XDP_SOCKETS) += xsk.o xdp_umem.o xsk_queue.o xskmap.o
+obj-$(CONFIG_XDP_SOCKETS) += xsk_buff_pool.o
obj-$(CONFIG_XDP_SOCKETS_DIAG) += xsk_diag.o
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 37ace3bc0d48..19e59d1a5e9f 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -179,37 +179,6 @@ void xdp_umem_clear_dev(struct xdp_umem *umem)
umem->zc = false;
}
-static void xdp_umem_unmap_pages(struct xdp_umem *umem)
-{
- unsigned int i;
-
- for (i = 0; i < umem->npgs; i++)
- if (PageHighMem(umem->pgs[i]))
- vunmap(umem->pages[i].addr);
-}
-
-static int xdp_umem_map_pages(struct xdp_umem *umem)
-{
- unsigned int i;
- void *addr;
-
- for (i = 0; i < umem->npgs; i++) {
- if (PageHighMem(umem->pgs[i]))
- addr = vmap(&umem->pgs[i], 1, VM_MAP, PAGE_KERNEL);
- else
- addr = page_address(umem->pgs[i]);
-
- if (!addr) {
- xdp_umem_unmap_pages(umem);
- return -ENOMEM;
- }
-
- umem->pages[i].addr = addr;
- }
-
- return 0;
-}
-
static void xdp_umem_unpin_pages(struct xdp_umem *umem)
{
unpin_user_pages_dirty_lock(umem->pgs, umem->npgs, true);
@@ -244,14 +213,9 @@ static void xdp_umem_release(struct xdp_umem *umem)
umem->cq = NULL;
}
- xsk_reuseq_destroy(umem);
-
- xdp_umem_unmap_pages(umem);
+ xp_destroy(umem->pool);
xdp_umem_unpin_pages(umem);
- kvfree(umem->pages);
- umem->pages = NULL;
-
xdp_umem_unaccount_pages(umem);
kfree(umem);
}
@@ -385,11 +349,9 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
if (headroom >= chunk_size - XDP_PACKET_HEADROOM)
return -EINVAL;
- umem->chunk_mask = unaligned_chunks ? XSK_UNALIGNED_BUF_ADDR_MASK
- : ~((u64)chunk_size - 1);
umem->size = size;
umem->headroom = headroom;
- umem->chunk_size_nohr = chunk_size - headroom;
+ umem->chunk_size = chunk_size;
umem->npgs = size / PAGE_SIZE;
umem->pgs = NULL;
umem->user = NULL;
@@ -407,18 +369,13 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
if (err)
goto out_account;
- umem->pages = kvcalloc(umem->npgs, sizeof(*umem->pages),
- GFP_KERNEL_ACCOUNT);
- if (!umem->pages) {
+ umem->pool = xp_create(umem->pgs, umem->npgs, chunks, chunk_size,
+ headroom, size, unaligned_chunks);
+ if (!umem->pool) {
err = -ENOMEM;
goto out_pin;
}
-
- err = xdp_umem_map_pages(umem);
- if (!err)
- return 0;
-
- kvfree(umem->pages);
+ return 0;
out_pin:
xdp_umem_unpin_pages(umem);
diff --git a/net/xdp/xdp_umem.h b/net/xdp/xdp_umem.h
index a63a9fb251f5..32067fe98f65 100644
--- a/net/xdp/xdp_umem.h
+++ b/net/xdp/xdp_umem.h
@@ -6,7 +6,7 @@
#ifndef XDP_UMEM_H_
#define XDP_UMEM_H_
-#include <net/xdp_sock.h>
+#include <net/xdp_sock_drv.h>
int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev,
u16 queue_id, u16 flags);
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 45ffd67b367d..b6c0f08bd80d 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -22,7 +22,7 @@
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/rculist.h>
-#include <net/xdp_sock.h>
+#include <net/xdp_sock_drv.h>
#include <net/xdp.h>
#include "xsk_queue.h"
@@ -39,24 +39,6 @@ bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs)
READ_ONCE(xs->umem->fq);
}
-bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt)
-{
- return xskq_cons_has_entries(umem->fq, cnt);
-}
-EXPORT_SYMBOL(xsk_umem_has_addrs);
-
-bool xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr)
-{
- return xskq_cons_peek_addr(umem->fq, addr, umem);
-}
-EXPORT_SYMBOL(xsk_umem_peek_addr);
-
-void xsk_umem_release_addr(struct xdp_umem *umem)
-{
- xskq_cons_release(umem->fq);
-}
-EXPORT_SYMBOL(xsk_umem_release_addr);
-
void xsk_set_rx_need_wakeup(struct xdp_umem *umem)
{
if (umem->need_wakeup & XDP_WAKEUP_RX)
@@ -117,76 +99,82 @@ bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem)
}
EXPORT_SYMBOL(xsk_umem_uses_need_wakeup);
-/* If a buffer crosses a page boundary, we need to do 2 memcpy's, one for
- * each page. This is only required in copy mode.
- */
-static void __xsk_rcv_memcpy(struct xdp_umem *umem, u64 addr, void *from_buf,
- u32 len, u32 metalen)
+void xp_release(struct xdp_buff_xsk *xskb)
{
- void *to_buf = xdp_umem_get_data(umem, addr);
-
- addr = xsk_umem_add_offset_to_addr(addr);
- if (xskq_cons_crosses_non_contig_pg(umem, addr, len + metalen)) {
- void *next_pg_addr = umem->pages[(addr >> PAGE_SHIFT) + 1].addr;
- u64 page_start = addr & ~(PAGE_SIZE - 1);
- u64 first_len = PAGE_SIZE - (addr - page_start);
-
- memcpy(to_buf, from_buf, first_len);
- memcpy(next_pg_addr, from_buf + first_len,
- len + metalen - first_len);
+ xskb->pool->free_heads[xskb->pool->free_heads_cnt++] = xskb;
+}
- return;
- }
+static u64 xp_get_handle(struct xdp_buff_xsk *xskb)
+{
+ u64 offset = xskb->xdp.data - xskb->xdp.data_hard_start;
- memcpy(to_buf, from_buf, len + metalen);
+ offset += xskb->pool->headroom;
+ if (!xskb->pool->unaligned)
+ return xskb->orig_addr + offset;
+ return xskb->orig_addr + (offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT);
}
-static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len)
+static int __xsk_rcv_zc(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len)
{
- u64 offset = xs->umem->headroom;
- u64 addr, memcpy_addr;
- void *from_buf;
- u32 metalen;
+ struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
+ u64 addr;
int err;
- if (!xskq_cons_peek_addr(xs->umem->fq, &addr, xs->umem) ||
- len > xs->umem->chunk_size_nohr - XDP_PACKET_HEADROOM) {
+ addr = xp_get_handle(xskb);
+ err = xskq_prod_reserve_desc(xs->rx, addr, len);
+ if (err) {
xs->rx_dropped++;
- return -ENOSPC;
+ return err;
}
- if (unlikely(xdp_data_meta_unsupported(xdp))) {
- from_buf = xdp->data;
- metalen = 0;
- } else {
- from_buf = xdp->data_meta;
- metalen = xdp->data - xdp->data_meta;
- }
+ xp_release(xskb);
+ return 0;
+}
- memcpy_addr = xsk_umem_adjust_offset(xs->umem, addr, offset);
- __xsk_rcv_memcpy(xs->umem, memcpy_addr, from_buf, len, metalen);
+static void xsk_copy_xdp(struct xdp_buff *to, struct xdp_buff *from, u32 len)
+{
+ void *from_buf, *to_buf;
+ u32 metalen;
- offset += metalen;
- addr = xsk_umem_adjust_offset(xs->umem, addr, offset);
- err = xskq_prod_reserve_desc(xs->rx, addr, len);
- if (!err) {
- xskq_cons_release(xs->umem->fq);
- xdp_return_buff(xdp);
- return 0;
+ if (unlikely(xdp_data_meta_unsupported(from))) {
+ from_buf = from->data;
+ to_buf = to->data;
+ metalen = 0;
+ } else {
+ from_buf = from->data_meta;
+ metalen = from->data - from->data_meta;
+ to_buf = to->data - metalen;
}
- xs->rx_dropped++;
- return err;
+ memcpy(to_buf, from_buf, len + metalen);
}
-static int __xsk_rcv_zc(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len)
+static int __xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len,
+ bool explicit_free)
{
- int err = xskq_prod_reserve_desc(xs->rx, xdp->handle, len);
+ struct xdp_buff *xsk_xdp;
+ int err;
- if (err)
+ if (len > xsk_umem_get_rx_frame_size(xs->umem)) {
xs->rx_dropped++;
+ return -ENOSPC;
+ }
- return err;
+ xsk_xdp = xsk_buff_alloc(xs->umem);
+ if (!xsk_xdp) {
+ xs->rx_dropped++;
+ return -ENOSPC;
+ }
+
+ xsk_copy_xdp(xsk_xdp, xdp, len);
+ err = __xsk_rcv_zc(xs, xsk_xdp, len);
+ if (err) {
+ xsk_buff_free(xsk_xdp);
+ return err;
+ }
+ if (explicit_free)
+ xdp_return_buff(xdp);
+ return 0;
}
static bool xsk_is_bound(struct xdp_sock *xs)
@@ -199,7 +187,8 @@ static bool xsk_is_bound(struct xdp_sock *xs)
return false;
}
-static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
+static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp,
+ bool explicit_free)
{
u32 len;
@@ -211,8 +200,9 @@ static int xsk_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
len = xdp->data_end - xdp->data;
- return (xdp->rxq->mem.type == MEM_TYPE_ZERO_COPY) ?
- __xsk_rcv_zc(xs, xdp, len) : __xsk_rcv(xs, xdp, len);
+ return xdp->rxq->mem.type == MEM_TYPE_XSK_BUFF_POOL ?
+ __xsk_rcv_zc(xs, xdp, len) :
+ __xsk_rcv(xs, xdp, len, explicit_free);
}
static void xsk_flush(struct xdp_sock *xs)
@@ -224,46 +214,11 @@ static void xsk_flush(struct xdp_sock *xs)
int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
{
- u32 metalen = xdp->data - xdp->data_meta;
- u32 len = xdp->data_end - xdp->data;
- u64 offset = xs->umem->headroom;
- void *buffer;
- u64 addr;
int err;
spin_lock_bh(&xs->rx_lock);
-
- if (xs->dev != xdp->rxq->dev || xs->queue_id != xdp->rxq->queue_index) {
- err = -EINVAL;
- goto out_unlock;
- }
-
- if (!xskq_cons_peek_addr(xs->umem->fq, &addr, xs->umem) ||
- len > xs->umem->chunk_size_nohr - XDP_PACKET_HEADROOM) {
- err = -ENOSPC;
- goto out_drop;
- }
-
- addr = xsk_umem_adjust_offset(xs->umem, addr, offset);
- buffer = xdp_umem_get_data(xs->umem, addr);
- memcpy(buffer, xdp->data_meta, len + metalen);
-
- addr = xsk_umem_adjust_offset(xs->umem, addr, metalen);
- err = xskq_prod_reserve_desc(xs->rx, addr, len);
- if (err)
- goto out_drop;
-
- xskq_cons_release(xs->umem->fq);
- xskq_prod_submit(xs->rx);
-
- spin_unlock_bh(&xs->rx_lock);
-
- xs->sk.sk_data_ready(&xs->sk);
- return 0;
-
-out_drop:
- xs->rx_dropped++;
-out_unlock:
+ err = xsk_rcv(xs, xdp, false);
+ xsk_flush(xs);
spin_unlock_bh(&xs->rx_lock);
return err;
}
@@ -273,7 +228,7 @@ int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
struct list_head *flush_list = this_cpu_ptr(&xskmap_flush_list);
int err;
- err = xsk_rcv(xs, xdp);
+ err = xsk_rcv(xs, xdp, true);
if (err)
return err;
@@ -404,7 +359,7 @@ static int xsk_generic_xmit(struct sock *sk)
skb_put(skb, len);
addr = desc.addr;
- buffer = xdp_umem_get_data(xs->umem, addr);
+ buffer = xsk_buff_raw_get_data(xs->umem, addr);
err = skb_store_bits(skb, 0, buffer, len);
/* This is the backpressure mechanism for the Tx path.
* Reserve space in the completion queue and only proceed
@@ -629,24 +584,6 @@ static struct socket *xsk_lookup_xsk_from_fd(int fd)
return sock;
}
-/* Check if umem pages are contiguous.
- * If zero-copy mode, use the DMA address to do the page contiguity check
- * For all other modes we use addr (kernel virtual address)
- * Store the result in the low bits of addr.
- */
-static void xsk_check_page_contiguity(struct xdp_umem *umem, u32 flags)
-{
- struct xdp_umem_page *pgs = umem->pages;
- int i, is_contig;
-
- for (i = 0; i < umem->npgs - 1; i++) {
- is_contig = (flags & XDP_ZEROCOPY) ?
- (pgs[i].dma + PAGE_SIZE == pgs[i + 1].dma) :
- (pgs[i].addr + PAGE_SIZE == pgs[i + 1].addr);
- pgs[i].addr += is_contig << XSK_NEXT_PG_CONTIG_SHIFT;
- }
-}
-
static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
struct sockaddr_xdp *sxdp = (struct sockaddr_xdp *)addr;
@@ -729,23 +666,14 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
goto out_unlock;
} else {
/* This xsk has its own umem. */
- xskq_set_umem(xs->umem->fq, xs->umem->size,
- xs->umem->chunk_mask);
- xskq_set_umem(xs->umem->cq, xs->umem->size,
- xs->umem->chunk_mask);
-
err = xdp_umem_assign_dev(xs->umem, dev, qid, flags);
if (err)
goto out_unlock;
-
- xsk_check_page_contiguity(xs->umem, flags);
}
xs->dev = dev;
xs->zc = xs->umem->zc;
xs->queue_id = qid;
- xskq_set_umem(xs->rx, xs->umem->size, xs->umem->chunk_mask);
- xskq_set_umem(xs->tx, xs->umem->size, xs->umem->chunk_mask);
xdp_add_sk_umem(xs->umem, xs);
out_unlock:
@@ -860,6 +788,8 @@ static int xsk_setsockopt(struct socket *sock, int level, int optname,
q = (optname == XDP_UMEM_FILL_RING) ? &xs->umem->fq :
&xs->umem->cq;
err = xsk_init_queue(entries, q, true);
+ if (optname == XDP_UMEM_FILL_RING)
+ xp_set_fq(xs->umem->pool, *q);
mutex_unlock(&xs->mutex);
return err;
}
diff --git a/net/xdp/xsk.h b/net/xdp/xsk.h
index 4cfd106bdb53..455ddd480f3d 100644
--- a/net/xdp/xsk.h
+++ b/net/xdp/xsk.h
@@ -4,6 +4,20 @@
#ifndef XSK_H_
#define XSK_H_
+/* Masks for xdp_umem_page flags.
+ * The low 12-bits of the addr will be 0 since this is the page address, so we
+ * can use them for flags.
+ */
+#define XSK_NEXT_PG_CONTIG_SHIFT 0
+#define XSK_NEXT_PG_CONTIG_MASK BIT_ULL(XSK_NEXT_PG_CONTIG_SHIFT)
+
+/* Flags for the umem flags field.
+ *
+ * The NEED_WAKEUP flag is 1 due to the reuse of the flags field for public
+ * flags. See inlude/uapi/include/linux/if_xdp.h.
+ */
+#define XDP_UMEM_USES_NEED_WAKEUP BIT(1)
+
struct xdp_ring_offset_v1 {
__u64 producer;
__u64 consumer;
@@ -17,9 +31,25 @@ struct xdp_mmap_offsets_v1 {
struct xdp_ring_offset_v1 cr;
};
+/* Nodes are linked in the struct xdp_sock map_list field, and used to
+ * track which maps a certain socket reside in.
+ */
+
+struct xsk_map_node {
+ struct list_head node;
+ struct xsk_map *map;
+ struct xdp_sock **map_entry;
+};
+
static inline struct xdp_sock *xdp_sk(struct sock *sk)
{
return (struct xdp_sock *)sk;
}
+bool xsk_is_setup_for_bpf_map(struct xdp_sock *xs);
+void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
+ struct xdp_sock **map_entry);
+int xsk_map_inc(struct xsk_map *map);
+void xsk_map_put(struct xsk_map *map);
+
#endif /* XSK_H_ */
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
new file mode 100644
index 000000000000..540ed75e4482
--- /dev/null
+++ b/net/xdp/xsk_buff_pool.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <net/xsk_buff_pool.h>
+#include <net/xdp_sock.h>
+#include <linux/dma-direct.h>
+#include <linux/dma-noncoherent.h>
+#include <linux/swiotlb.h>
+
+#include "xsk_queue.h"
+
+static void xp_addr_unmap(struct xsk_buff_pool *pool)
+{
+ vunmap(pool->addrs);
+}
+
+static int xp_addr_map(struct xsk_buff_pool *pool,
+ struct page **pages, u32 nr_pages)
+{
+ pool->addrs = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
+ if (!pool->addrs)
+ return -ENOMEM;
+ return 0;
+}
+
+void xp_destroy(struct xsk_buff_pool *pool)
+{
+ if (!pool)
+ return;
+
+ xp_addr_unmap(pool);
+ kvfree(pool->heads);
+ kvfree(pool);
+}
+
+struct xsk_buff_pool *xp_create(struct page **pages, u32 nr_pages, u32 chunks,
+ u32 chunk_size, u32 headroom, u64 size,
+ bool unaligned)
+{
+ struct xsk_buff_pool *pool;
+ struct xdp_buff_xsk *xskb;
+ int err;
+ u32 i;
+
+ pool = kvzalloc(struct_size(pool, free_heads, chunks), GFP_KERNEL);
+ if (!pool)
+ goto out;
+
+ pool->heads = kvcalloc(chunks, sizeof(*pool->heads), GFP_KERNEL);
+ if (!pool->heads)
+ goto out;
+
+ pool->chunk_mask = ~((u64)chunk_size - 1);
+ pool->addrs_cnt = size;
+ pool->heads_cnt = chunks;
+ pool->free_heads_cnt = chunks;
+ pool->headroom = headroom;
+ pool->chunk_size = chunk_size;
+ pool->cheap_dma = true;
+ pool->unaligned = unaligned;
+ pool->frame_len = chunk_size - headroom - XDP_PACKET_HEADROOM;
+ INIT_LIST_HEAD(&pool->free_list);
+
+ for (i = 0; i < pool->free_heads_cnt; i++) {
+ xskb = &pool->heads[i];
+ xskb->pool = pool;
+ xskb->xdp.frame_sz = chunk_size - headroom;
+ pool->free_heads[i] = xskb;
+ }
+
+ err = xp_addr_map(pool, pages, nr_pages);
+ if (!err)
+ return pool;
+
+out:
+ xp_destroy(pool);
+ return NULL;
+}
+
+void xp_set_fq(struct xsk_buff_pool *pool, struct xsk_queue *fq)
+{
+ pool->fq = fq;
+}
+
+void xp_set_rxq_info(struct xsk_buff_pool *pool, struct xdp_rxq_info *rxq)
+{
+ u32 i;
+
+ for (i = 0; i < pool->heads_cnt; i++)
+ pool->heads[i].xdp.rxq = rxq;
+}
+EXPORT_SYMBOL(xp_set_rxq_info);
+
+void xp_dma_unmap(struct xsk_buff_pool *pool, unsigned long attrs)
+{
+ dma_addr_t *dma;
+ u32 i;
+
+ if (pool->dma_pages_cnt == 0)
+ return;
+
+ for (i = 0; i < pool->dma_pages_cnt; i++) {
+ dma = &pool->dma_pages[i];
+ if (*dma) {
+ dma_unmap_page_attrs(pool->dev, *dma, PAGE_SIZE,
+ DMA_BIDIRECTIONAL, attrs);
+ *dma = 0;
+ }
+ }
+
+ kvfree(pool->dma_pages);
+ pool->dma_pages_cnt = 0;
+ pool->dev = NULL;
+}
+EXPORT_SYMBOL(xp_dma_unmap);
+
+static void xp_check_dma_contiguity(struct xsk_buff_pool *pool)
+{
+ u32 i;
+
+ for (i = 0; i < pool->dma_pages_cnt - 1; i++) {
+ if (pool->dma_pages[i] + PAGE_SIZE == pool->dma_pages[i + 1])
+ pool->dma_pages[i] |= XSK_NEXT_PG_CONTIG_MASK;
+ else
+ pool->dma_pages[i] &= ~XSK_NEXT_PG_CONTIG_MASK;
+ }
+}
+
+static bool __maybe_unused xp_check_swiotlb_dma(struct xsk_buff_pool *pool)
+{
+#if defined(CONFIG_SWIOTLB)
+ phys_addr_t paddr;
+ u32 i;
+
+ for (i = 0; i < pool->dma_pages_cnt; i++) {
+ paddr = dma_to_phys(pool->dev, pool->dma_pages[i]);
+ if (is_swiotlb_buffer(paddr))
+ return false;
+ }
+#endif
+ return true;
+}
+
+static bool xp_check_cheap_dma(struct xsk_buff_pool *pool)
+{
+#if defined(CONFIG_HAS_DMA)
+ const struct dma_map_ops *ops = get_dma_ops(pool->dev);
+
+ if (ops) {
+ return !ops->sync_single_for_cpu &&
+ !ops->sync_single_for_device;
+ }
+
+ if (!dma_is_direct(ops))
+ return false;
+
+ if (!xp_check_swiotlb_dma(pool))
+ return false;
+
+ if (!dev_is_dma_coherent(pool->dev)) {
+#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
+ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
+ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE)
+ return false;
+#endif
+ }
+#endif
+ return true;
+}
+
+int xp_dma_map(struct xsk_buff_pool *pool, struct device *dev,
+ unsigned long attrs, struct page **pages, u32 nr_pages)
+{
+ dma_addr_t dma;
+ u32 i;
+
+ pool->dma_pages = kvcalloc(nr_pages, sizeof(*pool->dma_pages),
+ GFP_KERNEL);
+ if (!pool->dma_pages)
+ return -ENOMEM;
+
+ pool->dev = dev;
+ pool->dma_pages_cnt = nr_pages;
+
+ for (i = 0; i < pool->dma_pages_cnt; i++) {
+ dma = dma_map_page_attrs(dev, pages[i], 0, PAGE_SIZE,
+ DMA_BIDIRECTIONAL, attrs);
+ if (dma_mapping_error(dev, dma)) {
+ xp_dma_unmap(pool, attrs);
+ return -ENOMEM;
+ }
+ pool->dma_pages[i] = dma;
+ }
+
+ if (pool->unaligned)
+ xp_check_dma_contiguity(pool);
+
+ pool->dev = dev;
+ pool->cheap_dma = xp_check_cheap_dma(pool);
+ return 0;
+}
+EXPORT_SYMBOL(xp_dma_map);
+
+static bool xp_addr_crosses_non_contig_pg(struct xsk_buff_pool *pool,
+ u64 addr)
+{
+ return xp_desc_crosses_non_contig_pg(pool, addr, pool->chunk_size);
+}
+
+static bool xp_check_unaligned(struct xsk_buff_pool *pool, u64 *addr)
+{
+ *addr = xp_unaligned_extract_addr(*addr);
+ if (*addr >= pool->addrs_cnt ||
+ *addr + pool->chunk_size > pool->addrs_cnt ||
+ xp_addr_crosses_non_contig_pg(pool, *addr))
+ return false;
+ return true;
+}
+
+static bool xp_check_aligned(struct xsk_buff_pool *pool, u64 *addr)
+{
+ *addr = xp_aligned_extract_addr(pool, *addr);
+ return *addr < pool->addrs_cnt;
+}
+
+static struct xdp_buff_xsk *__xp_alloc(struct xsk_buff_pool *pool)
+{
+ struct xdp_buff_xsk *xskb;
+ u64 addr;
+ bool ok;
+
+ if (pool->free_heads_cnt == 0)
+ return NULL;
+
+ xskb = pool->free_heads[--pool->free_heads_cnt];
+
+ for (;;) {
+ if (!xskq_cons_peek_addr_unchecked(pool->fq, &addr)) {
+ xp_release(xskb);
+ return NULL;
+ }
+
+ ok = pool->unaligned ? xp_check_unaligned(pool, &addr) :
+ xp_check_aligned(pool, &addr);
+ if (!ok) {
+ pool->fq->invalid_descs++;
+ xskq_cons_release(pool->fq);
+ continue;
+ }
+ break;
+ }
+ xskq_cons_release(pool->fq);
+
+ xskb->orig_addr = addr;
+ xskb->xdp.data_hard_start = pool->addrs + addr + pool->headroom;
+ if (pool->dma_pages_cnt) {
+ xskb->frame_dma = (pool->dma_pages[addr >> PAGE_SHIFT] &
+ ~XSK_NEXT_PG_CONTIG_MASK) +
+ (addr & ~PAGE_MASK);
+ xskb->dma = xskb->frame_dma + pool->headroom +
+ XDP_PACKET_HEADROOM;
+ }
+ return xskb;
+}
+
+struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool)
+{
+ struct xdp_buff_xsk *xskb;
+
+ if (!pool->free_list_cnt) {
+ xskb = __xp_alloc(pool);
+ if (!xskb)
+ return NULL;
+ } else {
+ pool->free_list_cnt--;
+ xskb = list_first_entry(&pool->free_list, struct xdp_buff_xsk,
+ free_list_node);
+ list_del(&xskb->free_list_node);
+ }
+
+ xskb->xdp.data = xskb->xdp.data_hard_start + XDP_PACKET_HEADROOM;
+ xskb->xdp.data_meta = xskb->xdp.data;
+
+ if (!pool->cheap_dma) {
+ dma_sync_single_range_for_device(pool->dev, xskb->dma, 0,
+ pool->frame_len,
+ DMA_BIDIRECTIONAL);
+ }
+ return &xskb->xdp;
+}
+EXPORT_SYMBOL(xp_alloc);
+
+bool xp_can_alloc(struct xsk_buff_pool *pool, u32 count)
+{
+ if (pool->free_list_cnt >= count)
+ return true;
+ return xskq_cons_has_entries(pool->fq, count - pool->free_list_cnt);
+}
+EXPORT_SYMBOL(xp_can_alloc);
+
+void xp_free(struct xdp_buff_xsk *xskb)
+{
+ xskb->pool->free_list_cnt++;
+ list_add(&xskb->free_list_node, &xskb->pool->free_list);
+}
+EXPORT_SYMBOL(xp_free);
+
+void *xp_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
+{
+ addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
+ return pool->addrs + addr;
+}
+EXPORT_SYMBOL(xp_raw_get_data);
+
+dma_addr_t xp_raw_get_dma(struct xsk_buff_pool *pool, u64 addr)
+{
+ addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
+ return (pool->dma_pages[addr >> PAGE_SHIFT] &
+ ~XSK_NEXT_PG_CONTIG_MASK) +
+ (addr & ~PAGE_MASK);
+}
+EXPORT_SYMBOL(xp_raw_get_dma);
+
+void xp_dma_sync_for_cpu_slow(struct xdp_buff_xsk *xskb)
+{
+ dma_sync_single_range_for_cpu(xskb->pool->dev, xskb->dma, 0,
+ xskb->pool->frame_len, DMA_BIDIRECTIONAL);
+}
+EXPORT_SYMBOL(xp_dma_sync_for_cpu_slow);
+
+void xp_dma_sync_for_device_slow(struct xsk_buff_pool *pool, dma_addr_t dma,
+ size_t size)
+{
+ dma_sync_single_range_for_device(pool->dev, dma, 0,
+ size, DMA_BIDIRECTIONAL);
+}
+EXPORT_SYMBOL(xp_dma_sync_for_device_slow);
diff --git a/net/xdp/xsk_diag.c b/net/xdp/xsk_diag.c
index f59791ba43a0..0163b26aaf63 100644
--- a/net/xdp/xsk_diag.c
+++ b/net/xdp/xsk_diag.c
@@ -56,7 +56,7 @@ static int xsk_diag_put_umem(const struct xdp_sock *xs, struct sk_buff *nlskb)
du.id = umem->id;
du.size = umem->size;
du.num_pages = umem->npgs;
- du.chunk_size = umem->chunk_size_nohr + umem->headroom;
+ du.chunk_size = umem->chunk_size;
du.headroom = umem->headroom;
du.ifindex = umem->dev ? umem->dev->ifindex : 0;
du.queue_id = umem->queue_id;
diff --git a/net/xdp/xsk_queue.c b/net/xdp/xsk_queue.c
index 57fb81bd593c..6cf9586e5027 100644
--- a/net/xdp/xsk_queue.c
+++ b/net/xdp/xsk_queue.c
@@ -6,18 +6,10 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/overflow.h>
+#include <net/xdp_sock_drv.h>
#include "xsk_queue.h"
-void xskq_set_umem(struct xsk_queue *q, u64 umem_size, u64 chunk_mask)
-{
- if (!q)
- return;
-
- q->umem_size = umem_size;
- q->chunk_mask = chunk_mask;
-}
-
static size_t xskq_get_ring_size(struct xsk_queue *q, bool umem_queue)
{
struct xdp_umem_ring *umem_ring;
@@ -63,56 +55,3 @@ void xskq_destroy(struct xsk_queue *q)
page_frag_free(q->ring);
kfree(q);
}
-
-struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries)
-{
- struct xdp_umem_fq_reuse *newq;
-
- /* Check for overflow */
- if (nentries > (u32)roundup_pow_of_two(nentries))
- return NULL;
- nentries = roundup_pow_of_two(nentries);
-
- newq = kvmalloc(struct_size(newq, handles, nentries), GFP_KERNEL);
- if (!newq)
- return NULL;
- memset(newq, 0, offsetof(typeof(*newq), handles));
-
- newq->nentries = nentries;
- return newq;
-}
-EXPORT_SYMBOL_GPL(xsk_reuseq_prepare);
-
-struct xdp_umem_fq_reuse *xsk_reuseq_swap(struct xdp_umem *umem,
- struct xdp_umem_fq_reuse *newq)
-{
- struct xdp_umem_fq_reuse *oldq = umem->fq_reuse;
-
- if (!oldq) {
- umem->fq_reuse = newq;
- return NULL;
- }
-
- if (newq->nentries < oldq->length)
- return newq;
-
- memcpy(newq->handles, oldq->handles,
- array_size(oldq->length, sizeof(u64)));
- newq->length = oldq->length;
-
- umem->fq_reuse = newq;
- return oldq;
-}
-EXPORT_SYMBOL_GPL(xsk_reuseq_swap);
-
-void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq)
-{
- kvfree(rq);
-}
-EXPORT_SYMBOL_GPL(xsk_reuseq_free);
-
-void xsk_reuseq_destroy(struct xdp_umem *umem)
-{
- xsk_reuseq_free(umem->fq_reuse);
- umem->fq_reuse = NULL;
-}
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index 648733ec24ac..5b5d24d2dd37 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -9,6 +9,9 @@
#include <linux/types.h>
#include <linux/if_xdp.h>
#include <net/xdp_sock.h>
+#include <net/xsk_buff_pool.h>
+
+#include "xsk.h"
struct xdp_ring {
u32 producer ____cacheline_aligned_in_smp;
@@ -29,8 +32,6 @@ struct xdp_umem_ring {
};
struct xsk_queue {
- u64 chunk_mask;
- u64 umem_size;
u32 ring_mask;
u32 nentries;
u32 cached_prod;
@@ -103,98 +104,73 @@ struct xsk_queue {
/* Functions that read and validate content from consumer rings. */
-static inline bool xskq_cons_crosses_non_contig_pg(struct xdp_umem *umem,
- u64 addr,
- u64 length)
+static inline bool xskq_cons_read_addr_unchecked(struct xsk_queue *q, u64 *addr)
{
- bool cross_pg = (addr & (PAGE_SIZE - 1)) + length > PAGE_SIZE;
- bool next_pg_contig =
- (unsigned long)umem->pages[(addr >> PAGE_SHIFT)].addr &
- XSK_NEXT_PG_CONTIG_MASK;
-
- return cross_pg && !next_pg_contig;
-}
+ struct xdp_umem_ring *ring = (struct xdp_umem_ring *)q->ring;
-static inline bool xskq_cons_is_valid_unaligned(struct xsk_queue *q,
- u64 addr,
- u64 length,
- struct xdp_umem *umem)
-{
- u64 base_addr = xsk_umem_extract_addr(addr);
+ if (q->cached_cons != q->cached_prod) {
+ u32 idx = q->cached_cons & q->ring_mask;
- addr = xsk_umem_add_offset_to_addr(addr);
- if (base_addr >= q->umem_size || addr >= q->umem_size ||
- xskq_cons_crosses_non_contig_pg(umem, addr, length)) {
- q->invalid_descs++;
- return false;
+ *addr = ring->desc[idx];
+ return true;
}
- return true;
+ return false;
}
-static inline bool xskq_cons_is_valid_addr(struct xsk_queue *q, u64 addr)
+static inline bool xp_aligned_validate_desc(struct xsk_buff_pool *pool,
+ struct xdp_desc *desc)
{
- if (addr >= q->umem_size) {
- q->invalid_descs++;
+ u64 chunk, chunk_end;
+
+ chunk = xp_aligned_extract_addr(pool, desc->addr);
+ chunk_end = xp_aligned_extract_addr(pool, desc->addr + desc->len);
+ if (chunk != chunk_end)
+ return false;
+
+ if (chunk >= pool->addrs_cnt)
return false;
- }
+ if (desc->options)
+ return false;
return true;
}
-static inline bool xskq_cons_read_addr(struct xsk_queue *q, u64 *addr,
- struct xdp_umem *umem)
+static inline bool xp_unaligned_validate_desc(struct xsk_buff_pool *pool,
+ struct xdp_desc *desc)
{
- struct xdp_umem_ring *ring = (struct xdp_umem_ring *)q->ring;
-
- while (q->cached_cons != q->cached_prod) {
- u32 idx = q->cached_cons & q->ring_mask;
+ u64 addr, base_addr;
- *addr = ring->desc[idx] & q->chunk_mask;
+ base_addr = xp_unaligned_extract_addr(desc->addr);
+ addr = xp_unaligned_add_offset_to_addr(desc->addr);
- if (umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG) {
- if (xskq_cons_is_valid_unaligned(q, *addr,
- umem->chunk_size_nohr,
- umem))
- return true;
- goto out;
- }
+ if (desc->len > pool->chunk_size)
+ return false;
- if (xskq_cons_is_valid_addr(q, *addr))
- return true;
+ if (base_addr >= pool->addrs_cnt || addr >= pool->addrs_cnt ||
+ xp_desc_crosses_non_contig_pg(pool, addr, desc->len))
+ return false;
-out:
- q->cached_cons++;
- }
+ if (desc->options)
+ return false;
+ return true;
+}
- return false;
+static inline bool xp_validate_desc(struct xsk_buff_pool *pool,
+ struct xdp_desc *desc)
+{
+ return pool->unaligned ? xp_unaligned_validate_desc(pool, desc) :
+ xp_aligned_validate_desc(pool, desc);
}
static inline bool xskq_cons_is_valid_desc(struct xsk_queue *q,
struct xdp_desc *d,
struct xdp_umem *umem)
{
- if (umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG) {
- if (!xskq_cons_is_valid_unaligned(q, d->addr, d->len, umem))
- return false;
-
- if (d->len > umem->chunk_size_nohr || d->options) {
- q->invalid_descs++;
- return false;
- }
-
- return true;
- }
-
- if (!xskq_cons_is_valid_addr(q, d->addr))
- return false;
-
- if (((d->addr + d->len) & q->chunk_mask) != (d->addr & q->chunk_mask) ||
- d->options) {
+ if (!xp_validate_desc(umem->pool, d)) {
q->invalid_descs++;
return false;
}
-
return true;
}
@@ -250,12 +226,11 @@ static inline bool xskq_cons_has_entries(struct xsk_queue *q, u32 cnt)
return entries >= cnt;
}
-static inline bool xskq_cons_peek_addr(struct xsk_queue *q, u64 *addr,
- struct xdp_umem *umem)
+static inline bool xskq_cons_peek_addr_unchecked(struct xsk_queue *q, u64 *addr)
{
if (q->cached_prod == q->cached_cons)
xskq_cons_get_entries(q);
- return xskq_cons_read_addr(q, addr, umem);
+ return xskq_cons_read_addr_unchecked(q, addr);
}
static inline bool xskq_cons_peek_desc(struct xsk_queue *q,
@@ -379,11 +354,7 @@ static inline u64 xskq_nb_invalid_descs(struct xsk_queue *q)
return q ? q->invalid_descs : 0;
}
-void xskq_set_umem(struct xsk_queue *q, u64 umem_size, u64 chunk_mask);
struct xsk_queue *xskq_create(u32 nentries, bool umem_queue);
void xskq_destroy(struct xsk_queue *q_ops);
-/* Executed by the core when the entire UMEM gets freed */
-void xsk_reuseq_destroy(struct xdp_umem *umem);
-
#endif /* _LINUX_XSK_QUEUE_H */
diff --git a/net/xdp/xskmap.c b/net/xdp/xskmap.c
new file mode 100644
index 000000000000..1dc7208c71ba
--- /dev/null
+++ b/net/xdp/xskmap.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0
+/* XSKMAP used for AF_XDP sockets
+ * Copyright(c) 2018 Intel Corporation.
+ */
+
+#include <linux/bpf.h>
+#include <linux/capability.h>
+#include <net/xdp_sock.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+#include "xsk.h"
+
+int xsk_map_inc(struct xsk_map *map)
+{
+ bpf_map_inc(&map->map);
+ return 0;
+}
+
+void xsk_map_put(struct xsk_map *map)
+{
+ bpf_map_put(&map->map);
+}
+
+static struct xsk_map_node *xsk_map_node_alloc(struct xsk_map *map,
+ struct xdp_sock **map_entry)
+{
+ struct xsk_map_node *node;
+ int err;
+
+ node = kzalloc(sizeof(*node), GFP_ATOMIC | __GFP_NOWARN);
+ if (!node)
+ return ERR_PTR(-ENOMEM);
+
+ err = xsk_map_inc(map);
+ if (err) {
+ kfree(node);
+ return ERR_PTR(err);
+ }
+
+ node->map = map;
+ node->map_entry = map_entry;
+ return node;
+}
+
+static void xsk_map_node_free(struct xsk_map_node *node)
+{
+ xsk_map_put(node->map);
+ kfree(node);
+}
+
+static void xsk_map_sock_add(struct xdp_sock *xs, struct xsk_map_node *node)
+{
+ spin_lock_bh(&xs->map_list_lock);
+ list_add_tail(&node->node, &xs->map_list);
+ spin_unlock_bh(&xs->map_list_lock);
+}
+
+static void xsk_map_sock_delete(struct xdp_sock *xs,
+ struct xdp_sock **map_entry)
+{
+ struct xsk_map_node *n, *tmp;
+
+ spin_lock_bh(&xs->map_list_lock);
+ list_for_each_entry_safe(n, tmp, &xs->map_list, node) {
+ if (map_entry == n->map_entry) {
+ list_del(&n->node);
+ xsk_map_node_free(n);
+ }
+ }
+ spin_unlock_bh(&xs->map_list_lock);
+}
+
+static struct bpf_map *xsk_map_alloc(union bpf_attr *attr)
+{
+ struct bpf_map_memory mem;
+ int err, numa_node;
+ struct xsk_map *m;
+ u64 size;
+
+ if (!capable(CAP_NET_ADMIN))
+ return ERR_PTR(-EPERM);
+
+ if (attr->max_entries == 0 || attr->key_size != 4 ||
+ attr->value_size != 4 ||
+ attr->map_flags & ~(BPF_F_NUMA_NODE | BPF_F_RDONLY | BPF_F_WRONLY))
+ return ERR_PTR(-EINVAL);
+
+ numa_node = bpf_map_attr_numa_node(attr);
+ size = struct_size(m, xsk_map, attr->max_entries);
+
+ err = bpf_map_charge_init(&mem, size);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ m = bpf_map_area_alloc(size, numa_node);
+ if (!m) {
+ bpf_map_charge_finish(&mem);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ bpf_map_init_from_attr(&m->map, attr);
+ bpf_map_charge_move(&m->map.memory, &mem);
+ spin_lock_init(&m->lock);
+
+ return &m->map;
+}
+
+static void xsk_map_free(struct bpf_map *map)
+{
+ struct xsk_map *m = container_of(map, struct xsk_map, map);
+
+ bpf_clear_redirect_map(map);
+ synchronize_net();
+ bpf_map_area_free(m);
+}
+
+static int xsk_map_get_next_key(struct bpf_map *map, void *key, void *next_key)
+{
+ struct xsk_map *m = container_of(map, struct xsk_map, map);
+ u32 index = key ? *(u32 *)key : U32_MAX;
+ u32 *next = next_key;
+
+ if (index >= m->map.max_entries) {
+ *next = 0;
+ return 0;
+ }
+
+ if (index == m->map.max_entries - 1)
+ return -ENOENT;
+ *next = index + 1;
+ return 0;
+}
+
+static u32 xsk_map_gen_lookup(struct bpf_map *map, struct bpf_insn *insn_buf)
+{
+ const int ret = BPF_REG_0, mp = BPF_REG_1, index = BPF_REG_2;
+ struct bpf_insn *insn = insn_buf;
+
+ *insn++ = BPF_LDX_MEM(BPF_W, ret, index, 0);
+ *insn++ = BPF_JMP_IMM(BPF_JGE, ret, map->max_entries, 5);
+ *insn++ = BPF_ALU64_IMM(BPF_LSH, ret, ilog2(sizeof(struct xsk_sock *)));
+ *insn++ = BPF_ALU64_IMM(BPF_ADD, mp, offsetof(struct xsk_map, xsk_map));
+ *insn++ = BPF_ALU64_REG(BPF_ADD, ret, mp);
+ *insn++ = BPF_LDX_MEM(BPF_SIZEOF(struct xsk_sock *), ret, ret, 0);
+ *insn++ = BPF_JMP_IMM(BPF_JA, 0, 0, 1);
+ *insn++ = BPF_MOV64_IMM(ret, 0);
+ return insn - insn_buf;
+}
+
+static void *xsk_map_lookup_elem(struct bpf_map *map, void *key)
+{
+ WARN_ON_ONCE(!rcu_read_lock_held());
+ return __xsk_map_lookup_elem(map, *(u32 *)key);
+}
+
+static void *xsk_map_lookup_elem_sys_only(struct bpf_map *map, void *key)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static int xsk_map_update_elem(struct bpf_map *map, void *key, void *value,
+ u64 map_flags)
+{
+ struct xsk_map *m = container_of(map, struct xsk_map, map);
+ struct xdp_sock *xs, *old_xs, **map_entry;
+ u32 i = *(u32 *)key, fd = *(u32 *)value;
+ struct xsk_map_node *node;
+ struct socket *sock;
+ int err;
+
+ if (unlikely(map_flags > BPF_EXIST))
+ return -EINVAL;
+ if (unlikely(i >= m->map.max_entries))
+ return -E2BIG;
+
+ sock = sockfd_lookup(fd, &err);
+ if (!sock)
+ return err;
+
+ if (sock->sk->sk_family != PF_XDP) {
+ sockfd_put(sock);
+ return -EOPNOTSUPP;
+ }
+
+ xs = (struct xdp_sock *)sock->sk;
+
+ if (!xsk_is_setup_for_bpf_map(xs)) {
+ sockfd_put(sock);
+ return -EOPNOTSUPP;
+ }
+
+ map_entry = &m->xsk_map[i];
+ node = xsk_map_node_alloc(m, map_entry);
+ if (IS_ERR(node)) {
+ sockfd_put(sock);
+ return PTR_ERR(node);
+ }
+
+ spin_lock_bh(&m->lock);
+ old_xs = READ_ONCE(*map_entry);
+ if (old_xs == xs) {
+ err = 0;
+ goto out;
+ } else if (old_xs && map_flags == BPF_NOEXIST) {
+ err = -EEXIST;
+ goto out;
+ } else if (!old_xs && map_flags == BPF_EXIST) {
+ err = -ENOENT;
+ goto out;
+ }
+ xsk_map_sock_add(xs, node);
+ WRITE_ONCE(*map_entry, xs);
+ if (old_xs)
+ xsk_map_sock_delete(old_xs, map_entry);
+ spin_unlock_bh(&m->lock);
+ sockfd_put(sock);
+ return 0;
+
+out:
+ spin_unlock_bh(&m->lock);
+ sockfd_put(sock);
+ xsk_map_node_free(node);
+ return err;
+}
+
+static int xsk_map_delete_elem(struct bpf_map *map, void *key)
+{
+ struct xsk_map *m = container_of(map, struct xsk_map, map);
+ struct xdp_sock *old_xs, **map_entry;
+ int k = *(u32 *)key;
+
+ if (k >= map->max_entries)
+ return -EINVAL;
+
+ spin_lock_bh(&m->lock);
+ map_entry = &m->xsk_map[k];
+ old_xs = xchg(map_entry, NULL);
+ if (old_xs)
+ xsk_map_sock_delete(old_xs, map_entry);
+ spin_unlock_bh(&m->lock);
+
+ return 0;
+}
+
+void xsk_map_try_sock_delete(struct xsk_map *map, struct xdp_sock *xs,
+ struct xdp_sock **map_entry)
+{
+ spin_lock_bh(&map->lock);
+ if (READ_ONCE(*map_entry) == xs) {
+ WRITE_ONCE(*map_entry, NULL);
+ xsk_map_sock_delete(xs, map_entry);
+ }
+ spin_unlock_bh(&map->lock);
+}
+
+const struct bpf_map_ops xsk_map_ops = {
+ .map_alloc = xsk_map_alloc,
+ .map_free = xsk_map_free,
+ .map_get_next_key = xsk_map_get_next_key,
+ .map_lookup_elem = xsk_map_lookup_elem,
+ .map_gen_lookup = xsk_map_gen_lookup,
+ .map_lookup_elem_sys_only = xsk_map_lookup_elem_sys_only,
+ .map_update_elem = xsk_map_update_elem,
+ .map_delete_elem = xsk_map_delete_elem,
+ .map_check_btf = map_check_no_btf,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 09:18:20 +0000