diff options
| author |   Geliang Tang <tanggeliang@kylinos.cn> | 2025-02-28 18:01:31 +0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2025-03-03 17:16:34 -0800 |
| commit | 456cc675b6d4cadd4872a477d8976ff56eef4b6f (patch) | |
| tree | 7b10478e9ac52fba8cf90a52f27bd5b3746e469e | |
| parent | Merge branch 'tcp-misc-changes' (diff) | |
| download | wireguard-linux-456cc675b6d4cadd4872a477d8976ff56eef4b6f.tar.xz wireguard-linux-456cc675b6d4cadd4872a477d8976ff56eef4b6f.zip | |
sock: add sock_kmemdup helper
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.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/f828077394c7d1f3560123497348b438c875b510.1740735165.git.tanggeliang@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/net/sock.h | 2 | ||||
| -rw-r--r-- | net/core/sock.c | 16 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index e771d99f81b0..8daf1b3b12c6 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1797,6 +1797,8 @@ static inline struct sk_buff *sock_alloc_send_skb(struct sock *sk, } void *sock_kmalloc(struct sock *sk, int size, gfp_t priority); +void *sock_kmemdup(struct sock *sk, const void *src, + int size, gfp_t priority); void sock_kfree_s(struct sock *sk, void *mem, int size); void sock_kzfree_s(struct sock *sk, void *mem, int size); void sk_send_sigurg(struct sock *sk); diff --git a/net/core/sock.c b/net/core/sock.c index 23bce41f7f1f..a0598518ce89 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2836,6 +2836,22 @@ 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; +} +EXPORT_SYMBOL(sock_kmemdup); + /* Free an option memory block. Note, we actually want the inline * here as this allows gcc to detect the nullify and fold away the * condition entirely. |