BMC/Intel-BMC/linux.git/net/ipv4/tcp_metrics.c, branch dev

tcp: RFC7413 option support for Fast Open client

2015-04-07T22:36:39+00:00

Fast Open has been using an experimental option with a magic number (RFC6994). This patch makes the client by default use the RFC7413 option (34) to get and send Fast Open cookies. This patch makes the client solicit cookies from a given server first with the RFC7413 option. If that fails to elicit a cookie, then it tries the RFC6994 experimental option. If that also fails, it uses the RFC7413 option on all subsequent connect attempts. If the server returns a Fast Open cookie then the client caches the form of the option that successfully elicited a cookie, and uses that form on later connects when it presents that cookie. The idea is to gradually obsolete the use of experimental options as the servers and clients upgrade, while keeping the interoperability meanwhile. Signed-off-by: Daniel Lee Signed-off-by: Yuchung Cheng Signed-off-by: Neal Cardwell Signed-off-by: David S. Miller

ipv4: coding style: comparison for equality with NULL

2015-04-03T16:11:15+00:00

The ipv4 code uses a mixture of coding styles. In some instances check for NULL pointer is done as x == NULL and sometimes as !x. !x is preferred according to checkpatch and this patch makes the code consistent by adopting the latter form. No changes detected by objdiff. Signed-off-by: Ian Morris Signed-off-by: David S. Miller

netlink: implement nla_get_in_addr and nla_get_in6_addr

2015-03-31T17:58:35+00:00

Those are counterparts to nla_put_in_addr and nla_put_in6_addr. Signed-off-by: Jiri Benc Signed-off-by: David S. Miller

netlink: implement nla_put_in_addr and nla_put_in6_addr

2015-03-31T17:58:35+00:00

IP addresses are often stored in netlink attributes. Add generic functions to do that. For nla_put_in_addr, it would be nicer to pass struct in_addr but this is not used universally throughout the kernel, in way too many places __be32 is used to store IPv4 address. Signed-off-by: Jiri Benc Signed-off-by: David S. Miller

tcp: simplify inetpeer_addr_base use

2015-03-31T17:58:35+00:00

In many places, the a6 field is typecasted to struct in6_addr. As the fields are in union anyway, just add in6_addr type to the union and get rid of the typecasting. Signed-off-by: Jiri Benc Signed-off-by: David S. Miller

tcp_metrics: fix wrong lockdep annotations

2015-03-16T20:32:23+00:00

Changes in tcp_metric hash table are protected by tcp_metrics_lock only, not by genl_mutex While we are at it use deref_locked() instead of rcu_dereference() in tcp_new() to avoid unnecessary barrier, as we hold tcp_metrics_lock as well. Reported-by: Andrew Vagin Signed-off-by: Eric Dumazet Fixes: 098a697b497e ("tcp_metrics: Use a single hash table for all network namespaces.") Reviewed-by: "Eric W. Biederman" Signed-off-by: David S. Miller

tcp_metrics: Use a single hash table for all network namespaces.

2015-03-13T05:57:07+00:00

Now that all of the operations are safe on a single hash table accross network namespaces, allocate a single global hash table and update the code to use it. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller

tcp_metrics: Rewrite tcp_metrics_flush_all

2015-03-13T05:57:07+00:00

Rewrite tcp_metrics_flush_all so that it can cope with entries from different network namespaces on it's hash chain. This is based on the logic in tcp_metrics_nl_cmd_del for deleting a selection of entries from a tcp metrics hash chain. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller

tcp_metrics: Remove the unused return code from tcp_metrics_flush_all

2015-03-13T05:57:07+00:00

tcp_metrics_flush_all always returns 0. Remove the unnecessary return code. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller

tcp_metrics: Add a field tcpm_net and verify it matches on lookup

2015-03-13T05:57:07+00:00

In preparation for using one tcp metrics hash table for all network namespaces add a field tcpm_net to struct tcp_metrics_block, and verify that field on all hash table lookups. Make the field tcpm_net of type possible_net_t so it takes no space when network namespaces are disabled. Further add a function tm_net to read that field so we can be efficient when network namespaces are disabled and concise the rest of the time. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller