diff mbox series

[net-next,v2,1/3] sock: add sock_kmemdup helper

Message ID f828077394c7d1f3560123497348b438c875b510.1740735165.git.tanggeliang@kylinos.cn (mailing list archive)
State Accepted
Commit 456cc675b6d4cadd4872a477d8976ff56eef4b6f
Delegated to: Netdev Maintainers
Headers show
Series add sock_kmemdup helper | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 14 this patch: 14
netdev/build_tools success Errors and warnings before: 26 (+1) this patch: 26 (+1)
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 26 this patch: 26
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 2623 this patch: 2623
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 30 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 13 this patch: 13
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-03-01--03-00 (tests: 893)

Commit Message

Geliang Tang Feb. 28, 2025, 10:01 a.m. UTC 
From: Geliang Tang <tanggeliang@kylinos.cn>

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>
---
 include/net/sock.h |  2 ++
 net/core/sock.c    | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

Comments

Kuniyuki Iwashima March 3, 2025, 11:16 p.m. UTC | #1 
From: Geliang Tang <geliang@kernel.org>
Date: Fri, 28 Feb 2025 18:01:31 +0800
> From: Geliang Tang <tanggeliang@kylinos.cn>
> 
> 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>
diff mbox series

Patch

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.