From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Jesper Dangaard Brouer <hawk@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
netdev@vger.kernel.org, linux-mm@kvack.org,
Shakeel Butt <shakeelb@google.com>,
Jesse Brandeburg <jesse.brandeburg@intel.com>
Subject: [PATCH v3 23/26] net: Add support for netmem in skb_frag
Date: Wed, 11 Jan 2023 04:22:11 +0000 [thread overview]
Message-ID: <20230111042214.907030-24-willy@infradead.org> (raw)
In-Reply-To: <20230111042214.907030-1-willy@infradead.org>
Allow drivers to add netmem to skbs & retrieve them again. If the
VM_BUG_ON triggers, we can add a call to compound_head() either in
this function or in page_netmem().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
---
include/linux/skbuff.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4c8492401a10..4b04240385cc 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3346,6 +3346,12 @@ static inline struct page *skb_frag_page(const skb_frag_t *frag)
return frag->bv_page;
}
+static inline struct netmem *skb_frag_netmem(const skb_frag_t *frag)
+{
+ VM_BUG_ON_PAGE(PageTail(frag->bv_page), frag->bv_page);
+ return page_netmem(frag->bv_page);
+}
+
/**
* __skb_frag_ref - take an addition reference on a paged fragment.
* @frag: the paged fragment
@@ -3454,6 +3460,11 @@ static inline void __skb_frag_set_page(skb_frag_t *frag, struct page *page)
frag->bv_page = page;
}
+static inline void __skb_frag_set_netmem(skb_frag_t *frag, struct netmem *nmem)
+{
+ __skb_frag_set_page(frag, netmem_page(nmem));
+}
+
/**
* skb_frag_set_page - sets the page contained in a paged fragment of an skb
* @skb: the buffer
--
2.35.1
next prev parent reply other threads:[~2023-01-11 4:22 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-11 4:21 [PATCH v3 00/26] Split netmem from struct page Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 01/26] netmem: Create new type Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 02/26] netmem: Add utility functions Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 03/26] page_pool: Add netmem_set_dma_addr() and netmem_get_dma_addr() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 04/26] page_pool: Convert page_pool_release_page() to page_pool_release_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 05/26] page_pool: Start using netmem in allocation path Matthew Wilcox (Oracle)
2023-01-12 15:36 ` Shay Agroskin
2023-01-12 20:29 ` Matthew Wilcox
2023-01-11 4:21 ` [PATCH v3 06/26] page_pool: Convert page_pool_return_page() to page_pool_return_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 07/26] page_pool: Convert __page_pool_put_page() to __page_pool_put_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 08/26] page_pool: Convert pp_alloc_cache to contain netmem Matthew Wilcox (Oracle)
2023-01-14 12:28 ` Shay Agroskin
2023-01-14 17:58 ` Matthew Wilcox
2023-01-15 11:03 ` Shay Agroskin
2023-01-11 4:21 ` [PATCH v3 09/26] page_pool: Convert page_pool_defrag_page() to page_pool_defrag_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 10/26] page_pool: Convert page_pool_put_defragged_page() to netmem Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 11/26] page_pool: Convert page_pool_empty_ring() to use netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 12/26] page_pool: Convert page_pool_alloc_pages() to page_pool_alloc_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 13/26] page_pool: Convert page_pool_dma_sync_for_device() to take a netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 14/26] page_pool: Convert page_pool_recycle_in_cache() to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 15/26] page_pool: Remove __page_pool_put_page() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 16/26] page_pool: Use netmem in page_pool_drain_frag() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 17/26] page_pool: Convert page_pool_return_skb_page() to use netmem Matthew Wilcox (Oracle)
2023-01-12 8:46 ` Jesper Dangaard Brouer
2023-01-11 4:22 ` [PATCH v3 18/26] page_pool: Allow page_pool_recycle_direct() to take a netmem or a page Matthew Wilcox (Oracle)
2023-01-11 12:48 ` kernel test robot
2023-01-11 13:43 ` Matthew Wilcox
2023-01-12 8:45 ` Jesper Dangaard Brouer
2023-01-11 4:22 ` [PATCH v3 19/26] page_pool: Convert frag_page to frag_nmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 20/26] xdp: Convert to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 21/26] mm: Remove page pool members from struct page Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 22/26] page_pool: Pass a netmem to init_callback() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` Matthew Wilcox (Oracle) [this message]
2023-01-11 4:22 ` [PATCH v3 24/26] mvneta: Convert to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 25/26] mlx5: " Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 26/26] hns3: " Matthew Wilcox (Oracle)
2023-01-11 8:25 ` [PATCH v3 00/26] Split netmem from struct page Yunsheng Lin
2023-01-11 13:21 ` Matthew Wilcox
2023-01-12 2:12 ` Yunsheng Lin
2023-01-12 10:15 ` Jesper Dangaard Brouer
2023-01-13 2:19 ` Yunsheng Lin
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