diff options
author | David Howells <dhowells@redhat.com> | 2023-09-25 15:03:06 +0300 |
---|---|---|
committer | Christian Brauner <brauner@kernel.org> | 2023-10-09 10:35:14 +0300 |
commit | 6d0d419914286a1b255530812a38d992c6c4e608 (patch) | |
tree | 25d28ee0846b0cd0abe348734218889bc6a3e6f7 /net/core/skbuff.c | |
parent | c9eec08bac96898573c236af9cb0ccee765684fc (diff) | |
download | linux-6d0d419914286a1b255530812a38d992c6c4e608.tar.xz |
iov_iter, net: Move csum_and_copy_to/from_iter() to net/
Move csum_and_copy_to/from_iter() to net code now that the iteration
framework can be #included.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-10-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
cc: netdev@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'net/core/skbuff.c')
-rw-r--r-- | net/core/skbuff.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 4eaf7ed0d1f4..5dbdfce2d05f 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -62,6 +62,7 @@ #include <linux/if_vlan.h> #include <linux/mpls.h> #include <linux/kcov.h> +#include <linux/iov_iter.h> #include <net/protocol.h> #include <net/dst.h> @@ -6931,3 +6932,35 @@ out: return spliced ?: ret; } EXPORT_SYMBOL(skb_splice_from_iter); + +static __always_inline +size_t memcpy_from_iter_csum(void *iter_from, size_t progress, + size_t len, void *to, void *priv2) +{ + __wsum *csum = priv2; + + *csum = csum_and_memcpy(to + progress, iter_from, len, *csum, progress); + return 0; +} + +static __always_inline +size_t copy_from_user_iter_csum(void __user *iter_from, size_t progress, + size_t len, void *to, void *priv2) +{ + __wsum next, *csum = priv2; + + next = csum_and_copy_from_user(iter_from, to + progress, len); + *csum = csum_block_add(*csum, next, progress); + return next ? 0 : len; +} + +size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, + struct iov_iter *i) +{ + if (WARN_ON_ONCE(!i->data_source)) + return 0; + return iterate_and_advance2(i, bytes, addr, csum, + copy_from_user_iter_csum, + memcpy_from_iter_csum); +} +EXPORT_SYMBOL(csum_and_copy_from_iter); |