Re: [PATCH net-next 1/4] sock: add sock_kmemdup helper
From: Matthieu Baerts <matttbe@kernel.org>
Date: 2025-02-27 08:45:08
Also in:
linux-sctp, mptcp
Hi Geliang, On 27/02/2025 09:23, Geliang Tang wrote:
From: Geliang Tang <redacted> This patch adds the sock version of kmemdup() helper, named sock_kmemdup(), to duplicate the input "src" memory block using the socket's option memory buffer.
Thank you for suggesting this series. (...)
quoted hunk ↗ jump to hunk
diff --git a/net/core/sock.c b/net/core/sock.c index 5ac445f8244b..95e81d24f4cc 100644 --- a/net/core/sock.c +++ b/net/core/sock.c@@ -2819,6 +2819,21 @@ void *sock_kmalloc(struct sock *sk, int size, gfp_t priority) } EXPORT_SYMBOL(sock_kmalloc); +/* + * Duplicate the input "src" memory block using the socket's + * option memory buffer. + */ +void *sock_kmemdup(struct sock *sk, const void *src, + int size, gfp_t priority) +{ + void *mem; + + mem = sock_kmalloc(sk, size, priority); + if (mem) + memcpy(mem, src, size); + return mem; +}
I think you will need to add an EXPORT_SYMBOL() here, if you plan to use it in SCTP which can be compiled as a module. Cheers, Matt -- Sponsored by the NGI0 Core fund.