From 100803a84d3cb84bd3ee36e8ec4274019ad667ac Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 15 Nov 2015 00:12:48 -0500 Subject: [PATCH] ceph: switch to sock_recvmsg() ... and use ITER_BVEC instead of playing with kmap() Signed-off-by: Al Viro --- net/ceph/messenger.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 770c52701efa..9e46db7e5968 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -520,7 +520,8 @@ static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; int r; - r = kernel_recvmsg(sock, &msg, &iov, 1, len, msg.msg_flags); + iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, &iov, 1, len); + r = sock_recvmsg(sock, &msg, msg.msg_flags); if (r == -EAGAIN) r = 0; return r; @@ -529,17 +530,20 @@ static int ceph_tcp_recvmsg(struct socket *sock, void *buf, size_t len) static int ceph_tcp_recvpage(struct socket *sock, struct page *page, int page_offset, size_t length) { - void *kaddr; - int ret; + struct bio_vec bvec = { + .bv_page = page, + .bv_offset = page_offset, + .bv_len = length + }; + struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL }; + int r; BUG_ON(page_offset + length > PAGE_SIZE); - - kaddr = kmap(page); - BUG_ON(!kaddr); - ret = ceph_tcp_recvmsg(sock, kaddr + page_offset, length); - kunmap(page); - - return ret; + iov_iter_bvec(&msg.msg_iter, READ | ITER_BVEC, &bvec, 1, length); + r = sock_recvmsg(sock, &msg, msg.msg_flags); + if (r == -EAGAIN) + r = 0; + return r; } /* -- 2.39.5