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| author | Karsten Graul <kgraul@linux.vnet.ibm.com> | 2018-03-16 15:06:40 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-16 14:57:25 -0400 |
| commit | 1a26d0201d7670fd6c9086e15504911ce240e6ff (patch) | |
| tree | e8356f48977b9dbb8981aa010451e320f565483f /net/smc/smc_clc.h | |
| parent | c246d942eabc3288f5d93930663411070093ac52 (diff) | |
| download | linux-1a26d0201d7670fd6c9086e15504911ce240e6ff.tar.gz linux-1a26d0201d7670fd6c9086e15504911ce240e6ff.tar.bz2 linux-1a26d0201d7670fd6c9086e15504911ce240e6ff.zip | |
net/smc: add ipv6 support to CLC layer
The CLC layer is updated to support ipv6 proposal messages from peers and
to match incoming proposal messages against the ipv6 addresses of the net
device. struct smc_clc_ipv6_prefix is updated to provide the space for an
ipv6 address (struct was not used before). SMC_CLC_MAX_LEN is updated to
include the size of the proposal prefix. Existing code in net is not
affected, the previous SMC_CLC_MAX_LEN value is large enough to hold ipv4
proposal messages.
Signed-off-by: Karsten Graul <kgraul@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_clc.h')
| -rw-r--r-- | net/smc/smc_clc.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h index 5ddb0d22eb8a..63bf1dc2c1f9 100644 --- a/net/smc/smc_clc.h +++ b/net/smc/smc_clc.h @@ -60,10 +60,15 @@ struct smc_clc_msg_local { /* header2 of clc messages */ u8 mac[6]; /* mac of ib_device port */ }; +#define SMC_CLC_MAX_V6_PREFIX 8 + +/* Struct would be 4 byte aligned, but it is used in an array that is sent + * to peers and must conform to RFC7609, hence we need to use packed here. + */ struct smc_clc_ipv6_prefix { - u8 prefix[4]; + struct in6_addr prefix; u8 prefix_len; -} __packed; +} __packed; /* format defined in RFC7609 */ struct smc_clc_msg_proposal_prefix { /* prefix part of clc proposal message*/ __be32 outgoing_subnet; /* subnet mask */ @@ -79,9 +84,11 @@ struct smc_clc_msg_proposal { /* clc proposal message sent by Linux */ } __aligned(4); #define SMC_CLC_PROPOSAL_MAX_OFFSET 0x28 -#define SMC_CLC_PROPOSAL_MAX_PREFIX (8 * sizeof(struct smc_clc_ipv6_prefix)) +#define SMC_CLC_PROPOSAL_MAX_PREFIX (SMC_CLC_MAX_V6_PREFIX * \ + sizeof(struct smc_clc_ipv6_prefix)) #define SMC_CLC_MAX_LEN (sizeof(struct smc_clc_msg_proposal) + \ SMC_CLC_PROPOSAL_MAX_OFFSET + \ + sizeof(struct smc_clc_msg_proposal_prefix) + \ SMC_CLC_PROPOSAL_MAX_PREFIX + \ sizeof(struct smc_clc_msg_trail)) |