netdev - [PATCH net-next v3 07/10] crypto: af_alg: Indent the loop in af_alg

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Date: Tue,  6 Jun 2023 14:08:53 +0100
From: David Howells <dhowells@...hat.com>
To: netdev@...r.kernel.org
Cc: David Howells <dhowells@...hat.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Willem de Bruijn <willemdebruijn.kernel@...il.com>,
	David Ahern <dsahern@...nel.org>,
	Matthew Wilcox <willy@...radead.org>,
	Jens Axboe <axboe@...nel.dk>,
	linux-crypto@...r.kernel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v3 07/10] crypto: af_alg: Indent the loop in af_alg_sendmsg()

Put the loop in af_alg_sendmsg() into an if-statement to indent it to make
the next patch easier to review as that will add another branch to handle
MSG_SPLICE_PAGES to the if-statement.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Herbert Xu <herbert@...dor.apana.org.au>
cc: "David S. Miller" <davem@...emloft.net>
cc: Eric Dumazet <edumazet@...gle.com>
cc: Jakub Kicinski <kuba@...nel.org>
cc: Paolo Abeni <pabeni@...hat.com>
cc: Jens Axboe <axboe@...nel.dk>
cc: Matthew Wilcox <willy@...radead.org>
cc: linux-crypto@...r.kernel.org
cc: netdev@...r.kernel.org
---

Notes:
    ver #2)
     - Fix a checkpatch warning.

 crypto/af_alg.c | 51 ++++++++++++++++++++++++++-----------------------
 1 file changed, 27 insertions(+), 24 deletions(-)

diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index b8bf6d8525ba..fd56ccff6fed 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1030,35 +1030,38 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
 		if (sgl->cur)
 			sg_unmark_end(sg + sgl->cur - 1);
 
-		do {
-			struct page *pg;
-			unsigned int i = sgl->cur;
+		if (1 /* TODO check MSG_SPLICE_PAGES */) {
+			do {
+				struct page *pg;
+				unsigned int i = sgl->cur;
 
-			plen = min_t(size_t, len, PAGE_SIZE);
+				plen = min_t(size_t, len, PAGE_SIZE);
 
-			pg = alloc_page(GFP_KERNEL);
-			if (!pg) {
-				err = -ENOMEM;
-				goto unlock;
-			}
+				pg = alloc_page(GFP_KERNEL);
+				if (!pg) {
+					err = -ENOMEM;
+					goto unlock;
+				}
 
-			sg_assign_page(sg + i, pg);
+				sg_assign_page(sg + i, pg);
 
-			err = memcpy_from_msg(page_address(sg_page(sg + i)),
-					      msg, plen);
-			if (err) {
-				__free_page(sg_page(sg + i));
-				sg_assign_page(sg + i, NULL);
-				goto unlock;
-			}
+				err = memcpy_from_msg(
+					page_address(sg_page(sg + i)),
+					msg, plen);
+				if (err) {
+					__free_page(sg_page(sg + i));
+					sg_assign_page(sg + i, NULL);
+					goto unlock;
+				}
 
-			sg[i].length = plen;
-			len -= plen;
-			ctx->used += plen;
-			copied += plen;
-			size -= plen;
-			sgl->cur++;
-		} while (len && sgl->cur < MAX_SGL_ENTS);
+				sg[i].length = plen;
+				len -= plen;
+				ctx->used += plen;
+				copied += plen;
+				size -= plen;
+				sgl->cur++;
+			} while (len && sgl->cur < MAX_SGL_ENTS);
+		}
 
 		if (!size)
 			sg_mark_end(sg + sgl->cur - 1);