netdev - [PATCH net v2 0/3] skb frag: kmap

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Message-Id: <20210109221834.3459768-1-willemdebruijn.kernel@gmail.com>
Date:   Sat,  9 Jan 2021 17:18:31 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH net v2 0/3] skb frag: kmap_atomic fixes

From: Willem de Bruijn <willemb@...gle.com>

skb frags may be backed by highmem and/or compound pages. Various
code calls kmap_atomic to safely access highmem pages. But this
needs additional care for compound pages. Fix a few issues:

patch 1 expect kmap mappings with CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
patch 2 fixes kmap_atomic + compound page support in skb_seq_read
patch 3 fixes kmap_atomic + compound page support in esp

changes
  v1->v2
   - in patch 2, increase frag_off size from u16 to u32

Willem de Bruijn (3):
  net: support kmap_local forced debugging in skb_frag_foreach
  net: compound page support in skb_seq_read
  esp: avoid unneeded kmap_atomic call

 include/linux/skbuff.h |  3 ++-
 net/core/skbuff.c      | 28 +++++++++++++++++++++++-----
 net/ipv4/esp4.c        |  7 +------
 net/ipv6/esp6.c        |  7 +------
 4 files changed, 27 insertions(+), 18 deletions(-)

-- 
2.30.0.284.gd98b1dd5eaa7-goog