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| author | Bin Meng <bin.meng@windriver.com> | 2020-12-11 17:35:12 +0800 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2021-01-25 17:04:56 +0800 |
| commit | f574633529926697ced51b6865e5c50bbb78bf1b (patch) | |
| tree | 98d77919083dfcbec0247c6980c479d08bc07d3b /include/net | |
| parent | d97f11590a0f60cd911ace8bb68180b5a09a068d (diff) | |
| download | qemu-f574633529926697ced51b6865e5c50bbb78bf1b.zip qemu-f574633529926697ced51b6865e5c50bbb78bf1b.tar.gz qemu-f574633529926697ced51b6865e5c50bbb78bf1b.tar.bz2 | |
net: checksum: Introduce fine control over checksum type
At present net_checksum_calculate() blindly calculates all types of
checksums (IP, TCP, UDP). Some NICs may have a per type setting in
their BDs to control what checksum should be offloaded. To support
such hardware behavior, introduce a 'csum_flag' parameter to the
net_checksum_calculate() API to allow fine control over what type
checksum is calculated.
Existing users of this API are updated accordingly.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/checksum.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/net/checksum.h b/include/net/checksum.h index 05a0d27..7dec37e 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -21,11 +21,16 @@ #include "qemu/bswap.h" struct iovec; +#define CSUM_IP 0x01 +#define CSUM_TCP 0x02 +#define CSUM_UDP 0x04 +#define CSUM_ALL (CSUM_IP | CSUM_TCP | CSUM_UDP) + uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq); uint16_t net_checksum_finish(uint32_t sum); uint16_t net_checksum_tcpudp(uint16_t length, uint16_t proto, uint8_t *addrs, uint8_t *buf); -void net_checksum_calculate(uint8_t *data, int length); +void net_checksum_calculate(uint8_t *data, int length, int csum_flag); static inline uint32_t net_checksum_add(int len, uint8_t *buf) |