Message ID | 20230105214631.3939268-23-willy@infradead.org (mailing list archive) |
---|---|
State | New |
Headers | show
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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pDY4J-00GWoj-Jq; Thu, 05 Jan 2023 21:46:35 +0000 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> Subject: [PATCH v2 22/24] net: Add support for netmem in skb_frag Date: Thu, 5 Jan 2023 21:46:29 +0000 Message-Id: <20230105214631.3939268-23-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230105214631.3939268-1-willy@infradead.org> References: <20230105214631.3939268-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: CD0C4C0010 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: jtehgsikdatfq1qa3eqfhitsgxrw4pj7 X-HE-Tag: 1672955191-936766 X-HE-Meta: U2FsdGVkX1/aHXQgZEHyClb3r4hQqQhf0TIMKnZekpxol4AM9H9AVEoDShNNmzBAAs/q9TYRrxMKLIoqmn/XwImf4mwJIOt/TKaIpx3phpNdi0ZT1Ok9yGaKDpta/gpuPqNqaYfv6/xS0Y3Yt7bPVC8otsDo0iokqdetPF7Zgeg4SuM8MlvPPW8frJiqLv23Ntza7+eSYX/vyUugGQZ0fjuPEyuhwgHanuWQ5hezA6l3oQKY3o2/xUeJzLEaLD5a8192UmS8euu1p13kMg9OPFqRVWAVDvCtl+iqmbM+H2OdRHXp2YpvJu/qdbq6cjyZrWLg1dkTVue00ax2Yx6nbHwHcicnwGJ8M8fp3uvNhT7ZCeb6OQyRckJiIIbIViq8e1N7qPzGy5VLwnNwliZQQU0MMP7vkbOfzJmsFvJK/KkQxZAQ3EtcbYzfVa1kwIV0Q/U3ZGwXilOhviZHmirflrVHA9zE9vzRDyGMA9ua1Wjr/yrdnLs5VsKsKFJgpwJv9+LnOpieVtHW02oeZ99U9UEj9VZ4rffCU0hRl9fB/V3marpfwTGwsLRigEMwUIJHrrfLVU1M23lDIpE38XGvBjBN3D4pN6hGSx+ErFPt+a2Y9XLRFhuorRIr11sznbAOFupKFd8XeZ78SMCrNdQUoEPtUszGltDe1uV4AZGiMBI5g6YzVyx5GmyZz1VeLvkc4v+9gjLDdPCpprYu+1Dj8Cz8PZ2ogrreWjasNZUcOGmKNttJKVyh0Y+zCHNqYVPI8u0bRM3cLBJuaWb4+4W3TbgRlVxEGHBiyBq0K7RX3Aw2HZQruwMyXMvOX6XPgNCeN7kWQD+WZKDkiSHJTHfUtdZ35BCoZFaPepeN7LwH+/0Ozftn9BNzKQnEdqwBKZxRrLDSbGJMZRMXgXSjMuGjayqBqiqD/0gF+wkpx8xDcqud3H0kTQzH6A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
Series |
Split netmem from struct page
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expand
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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
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> --- include/linux/skbuff.h | 11 +++++++++++ 1 file changed, 11 insertions(+)