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authorMagnus Karlsson <magnus.karlsson@intel.com>2020-08-28 11:26:21 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2020-08-31 22:15:04 +0300
commit7f7ffa4e9c38f01d380ed9df6adb238fd5e6eea5 (patch)
tree3579463e962112520fea672b9fc0b0f0b00abb62 /net/xdp/xsk_buff_pool.c
parenta5aa8e529e3667eb377ec132d4b4926dee065a45 (diff)
downloadlinux-7f7ffa4e9c38f01d380ed9df6adb238fd5e6eea5.tar.xz
xsk: Move addrs from buffer pool to umem
Replicate the addrs pointer in the buffer pool to the umem. This mapping will be the same for all buffer pools sharing the same umem. In the buffer pool we leave the addrs pointer for performance reasons. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Björn Töpel <bjorn.topel@intel.com> Link: https://lore.kernel.org/bpf/1598603189-32145-8-git-send-email-magnus.karlsson@intel.com
Diffstat (limited to 'net/xdp/xsk_buff_pool.c')
-rw-r--r--net/xdp/xsk_buff_pool.c21
1 files changed, 2 insertions, 19 deletions
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index dbd913ef4928..c56387439f67 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -35,26 +35,11 @@ void xp_del_xsk(struct xsk_buff_pool *pool, struct xdp_sock *xs)
spin_unlock_irqrestore(&pool->xsk_tx_list_lock, flags);
}
-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);
}
@@ -64,7 +49,6 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
{
struct xsk_buff_pool *pool;
struct xdp_buff_xsk *xskb;
- int err;
u32 i;
pool = kvzalloc(struct_size(pool, free_heads, umem->chunks),
@@ -86,6 +70,7 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
pool->frame_len = umem->chunk_size - umem->headroom -
XDP_PACKET_HEADROOM;
pool->umem = umem;
+ pool->addrs = umem->addrs;
INIT_LIST_HEAD(&pool->free_list);
INIT_LIST_HEAD(&pool->xsk_tx_list);
spin_lock_init(&pool->xsk_tx_list_lock);
@@ -103,9 +88,7 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
pool->free_heads[i] = xskb;
}
- err = xp_addr_map(pool, umem->pgs, umem->npgs);
- if (!err)
- return pool;
+ return pool;
out:
xp_destroy(pool);