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sock: introduce SO_MEMINFO getsockopt

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Allows reading of SK_MEMINFO_VARS via socket option. This way an
application can get all meminfo related information in single socket
option call instead of multiple calls.

Adds helper function, sk_get_meminfo(), and uses that for both
getsockopt and sock_diag_put_meminfo().

Suggested by Eric Dumazet.

Signed-off-by: Josh Hunt <johunt@akamai.com>
Reviewed-by: Jason Baron <jbaron@akamai.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Josh Hunt 2017-03-20 15:22:03 -04:00 • committed by David S. Miller
commit a2d133b1d4
16 changed files with 60 additions and 9 deletions
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2
include/uapi/asm-generic/socket.h
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@ -94,4 +94,6 @@
#define SCM_TIMESTAMPING_OPT_STATS 54
#define SO_MEMINFO 55
#endif /* __ASM_GENERIC_SOCKET_H */