From: Mina Almasry <almasrymina@google.com> To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org Cc: "Mina Almasry" <almasrymina@google.com>, "David S. Miller" <davem@davemloft.net>, "Eric Dumazet" <edumazet@google.com>, "Jakub Kicinski" <kuba@kernel.org>, "Paolo Abeni" <pabeni@redhat.com>, "Jesper Dangaard Brouer" <hawk@kernel.org>, "Ilias Apalodimas" <ilias.apalodimas@linaro.org>, "Arnd Bergmann" <arnd@arndb.de>, "David Ahern" <dsahern@kernel.org>, "Willem de Bruijn" <willemdebruijn.kernel@gmail.com>, "Shuah Khan" <shuah@kernel.org>, "Sumit Semwal" <sumit.semwal@linaro.org>, "Christian König" <christian.koenig@amd.com>, "Shakeel Butt" <shakeelb@google.com>, "Jeroen de Borst" <jeroendb@google.com>, "Praveen Kaligineedi" <pkaligineedi@google.com>, "Willem de Bruijn" <willemb@google.com>, "Kaiyuan Zhang" <kaiyuanz@google.com> Subject: [RFC PATCH v3 11/12] net: add SO_DEVMEM_DONTNEED setsockopt to release RX pages Date: Sun, 5 Nov 2023 18:44:10 -0800 [thread overview] Message-ID: <20231106024413.2801438-12-almasrymina@google.com> (raw) In-Reply-To: <20231106024413.2801438-1-almasrymina@google.com> Add an interface for the user to notify the kernel that it is done reading the NET_RX dmabuf pages returned as cmsg. The kernel will drop the reference on the NET_RX pages to make them available for re-use. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Kaiyuan Zhang <kaiyuanz@google.com> Signed-off-by: Mina Almasry <almasrymina@google.com> --- include/uapi/asm-generic/socket.h | 1 + include/uapi/linux/uio.h | 4 ++++ net/core/sock.c | 36 +++++++++++++++++++++++++++++++ 3 files changed, 41 insertions(+) diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h index aacb97f16b78..eb93b43394d4 100644 --- a/include/uapi/asm-generic/socket.h +++ b/include/uapi/asm-generic/socket.h @@ -135,6 +135,7 @@ #define SO_PASSPIDFD 76 #define SO_PEERPIDFD 77 +#define SO_DEVMEM_DONTNEED 97 #define SO_DEVMEM_HEADER 98 #define SCM_DEVMEM_HEADER SO_DEVMEM_HEADER #define SO_DEVMEM_OFFSET 99 diff --git a/include/uapi/linux/uio.h b/include/uapi/linux/uio.h index ae94763b1963..71314bf41590 100644 --- a/include/uapi/linux/uio.h +++ b/include/uapi/linux/uio.h @@ -26,6 +26,10 @@ struct cmsg_devmem { __u32 frag_token; }; +struct devmemtoken { + __u32 token_start; + __u32 token_count; +}; /* * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1) */ diff --git a/net/core/sock.c b/net/core/sock.c index 1d28e3e87970..4ddc6b11d915 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1051,6 +1051,39 @@ static int sock_reserve_memory(struct sock *sk, int bytes) return 0; } +static noinline_for_stack int +sock_devmem_dontneed(struct sock *sk, sockptr_t optval, unsigned int optlen) +{ + struct devmemtoken tokens[128]; + unsigned int num_tokens, i, j; + int ret; + + if (sk->sk_type != SOCK_STREAM || sk->sk_protocol != IPPROTO_TCP) + return -EBADF; + + if (optlen % sizeof(struct devmemtoken) || optlen > sizeof(tokens)) + return -EINVAL; + + num_tokens = optlen / sizeof(struct devmemtoken); + if (copy_from_sockptr(tokens, optval, optlen)) + return -EFAULT; + + ret = 0; + for (i = 0; i < num_tokens; i++) { + for (j = 0; j < tokens[i].token_count; j++) { + struct page *page = xa_erase(&sk->sk_user_pages, + tokens[i].token_start + j); + + if (page) { + page_pool_page_put_many(page, 1); + ret++; + } + } + } + + return ret; +} + void sockopt_lock_sock(struct sock *sk) { /* When current->bpf_ctx is set, the setsockopt is called from @@ -1538,6 +1571,9 @@ int sk_setsockopt(struct sock *sk, int level, int optname, break; } + case SO_DEVMEM_DONTNEED: + ret = sock_devmem_dontneed(sk, optval, optlen); + break; default: ret = -ENOPROTOOPT; break; -- 2.42.0.869.gea05f2083d-goog
WARNING: multiple messages have this Message-ID (diff)
From: Mina Almasry <almasrymina@google.com> To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org Cc: "Mina Almasry" <almasrymina@google.com>, "Willem de Bruijn" <willemdebruijn.kernel@gmail.com>, "Kaiyuan Zhang" <kaiyuanz@google.com>, "Jeroen de Borst" <jeroendb@google.com>, "Jesper Dangaard Brouer" <hawk@kernel.org>, "Arnd Bergmann" <arnd@arndb.de>, "Christian König" <christian.koenig@amd.com>, "David Ahern" <dsahern@kernel.org>, "Ilias Apalodimas" <ilias.apalodimas@linaro.org>, "Willem de Bruijn" <willemb@google.com>, "Sumit Semwal" <sumit.semwal@linaro.org>, "Eric Dumazet" <edumazet@google.com>, "Shakeel Butt" <shakeelb@google.com>, "Praveen Kaligineedi" <pkaligineedi@google.com>, "Jakub Kicinski" <kuba@kernel.org>, "Paolo Abeni" <pabeni@redhat.com>, "Shuah Khan" <shuah@kernel.org>, "David S. Miller" <davem@davemloft.net> Subject: [RFC PATCH v3 11/12] net: add SO_DEVMEM_DONTNEED setsockopt to release RX pages Date: Sun, 5 Nov 2023 18:44:10 -0800 [thread overview] Message-ID: <20231106024413.2801438-12-almasrymina@google.com> (raw) In-Reply-To: <20231106024413.2801438-1-almasrymina@google.com> Add an interface for the user to notify the kernel that it is done reading the NET_RX dmabuf pages returned as cmsg. The kernel will drop the reference on the NET_RX pages to make them available for re-use. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Kaiyuan Zhang <kaiyuanz@google.com> Signed-off-by: Mina Almasry <almasrymina@google.com> --- include/uapi/asm-generic/socket.h | 1 + include/uapi/linux/uio.h | 4 ++++ net/core/sock.c | 36 +++++++++++++++++++++++++++++++ 3 files changed, 41 insertions(+) diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h index aacb97f16b78..eb93b43394d4 100644 --- a/include/uapi/asm-generic/socket.h +++ b/include/uapi/asm-generic/socket.h @@ -135,6 +135,7 @@ #define SO_PASSPIDFD 76 #define SO_PEERPIDFD 77 +#define SO_DEVMEM_DONTNEED 97 #define SO_DEVMEM_HEADER 98 #define SCM_DEVMEM_HEADER SO_DEVMEM_HEADER #define SO_DEVMEM_OFFSET 99 diff --git a/include/uapi/linux/uio.h b/include/uapi/linux/uio.h index ae94763b1963..71314bf41590 100644 --- a/include/uapi/linux/uio.h +++ b/include/uapi/linux/uio.h @@ -26,6 +26,10 @@ struct cmsg_devmem { __u32 frag_token; }; +struct devmemtoken { + __u32 token_start; + __u32 token_count; +}; /* * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1) */ diff --git a/net/core/sock.c b/net/core/sock.c index 1d28e3e87970..4ddc6b11d915 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1051,6 +1051,39 @@ static int sock_reserve_memory(struct sock *sk, int bytes) return 0; } +static noinline_for_stack int +sock_devmem_dontneed(struct sock *sk, sockptr_t optval, unsigned int optlen) +{ + struct devmemtoken tokens[128]; + unsigned int num_tokens, i, j; + int ret; + + if (sk->sk_type != SOCK_STREAM || sk->sk_protocol != IPPROTO_TCP) + return -EBADF; + + if (optlen % sizeof(struct devmemtoken) || optlen > sizeof(tokens)) + return -EINVAL; + + num_tokens = optlen / sizeof(struct devmemtoken); + if (copy_from_sockptr(tokens, optval, optlen)) + return -EFAULT; + + ret = 0; + for (i = 0; i < num_tokens; i++) { + for (j = 0; j < tokens[i].token_count; j++) { + struct page *page = xa_erase(&sk->sk_user_pages, + tokens[i].token_start + j); + + if (page) { + page_pool_page_put_many(page, 1); + ret++; + } + } + } + + return ret; +} + void sockopt_lock_sock(struct sock *sk) { /* When current->bpf_ctx is set, the setsockopt is called from @@ -1538,6 +1571,9 @@ int sk_setsockopt(struct sock *sk, int level, int optname, break; } + case SO_DEVMEM_DONTNEED: + ret = sock_devmem_dontneed(sk, optval, optlen); + break; default: ret = -ENOPROTOOPT; break; -- 2.42.0.869.gea05f2083d-goog
next prev parent reply other threads:[~2023-11-06 2:45 UTC|newest] Thread overview: 254+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-11-06 2:43 [RFC PATCH v3 00/12] Device Memory TCP Mina Almasry 2023-11-06 2:43 ` Mina Almasry 2023-11-06 2:44 ` [RFC PATCH v3 01/12] net: page_pool: factor out releasing DMA from releasing the page Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-06 2:44 ` [RFC PATCH v3 02/12] net: page_pool: create hooks for custom page providers Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-07 7:44 ` Yunsheng Lin 2023-11-07 7:44 ` Yunsheng Lin 2023-11-09 11:09 ` Paolo Abeni 2023-11-09 11:09 ` Paolo Abeni 2023-11-10 23:19 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-13 3:28 ` Mina Almasry 2023-11-13 3:28 ` Mina Almasry 2023-11-13 22:10 ` Jakub Kicinski 2023-11-13 22:10 ` Jakub Kicinski 2023-11-06 2:44 ` [RFC PATCH v3 03/12] net: netdev netlink api to bind dma-buf to a net device Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-10 23:16 ` Jakub Kicinski 2023-11-10 23:16 ` Jakub Kicinski 2023-11-06 2:44 ` [RFC PATCH v3 04/12] netdev: support binding dma-buf to netdevice Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-07 7:46 ` Yunsheng Lin 2023-11-07 7:46 ` Yunsheng Lin 2023-11-07 21:59 ` Mina Almasry 2023-11-07 21:59 ` Mina Almasry 2023-11-08 3:40 ` Yunsheng Lin 2023-11-08 3:40 ` Yunsheng Lin 2023-11-09 2:22 ` Mina Almasry 2023-11-09 2:22 ` Mina Almasry 2023-11-09 9:29 ` Yunsheng Lin 2023-11-09 9:29 ` Yunsheng Lin 2023-11-08 23:47 ` David Wei 2023-11-08 23:47 ` David Wei 2023-11-09 2:25 ` Mina Almasry 2023-11-09 2:25 ` Mina Almasry 2023-11-09 8:29 ` Paolo Abeni 2023-11-09 8:29 ` Paolo Abeni 2023-11-10 2:59 ` Mina Almasry 2023-11-10 2:59 ` Mina Almasry 2023-11-10 7:38 ` Yunsheng Lin 2023-11-10 7:38 ` Yunsheng Lin 2023-11-10 9:45 ` Mina Almasry 2023-11-10 9:45 ` Mina Almasry 2023-11-10 23:19 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-11 2:19 ` Mina Almasry 2023-11-11 2:19 ` Mina Almasry 2023-11-06 2:44 ` [RFC PATCH v3 05/12] netdev: netdevice devmem allocator Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-06 23:44 ` David Ahern 2023-11-06 23:44 ` David Ahern 2023-11-07 22:10 ` Mina Almasry 2023-11-07 22:10 ` Mina Almasry 2023-11-07 22:55 ` David Ahern 2023-11-07 22:55 ` David Ahern 2023-11-07 23:03 ` Mina Almasry 2023-11-07 23:03 ` Mina Almasry 2023-11-09 1:15 ` David Wei 2023-11-09 1:15 ` David Wei 2023-11-10 14:26 ` Pavel Begunkov 2023-11-10 14:26 ` Pavel Begunkov 2023-11-11 17:19 ` David Ahern 2023-11-11 17:19 ` David Ahern 2023-11-14 16:09 ` Pavel Begunkov 2023-11-14 16:09 ` Pavel Begunkov 2023-11-09 1:00 ` David Wei 2023-11-09 1:00 ` David Wei 2023-11-08 3:48 ` Yunsheng Lin 2023-11-08 3:48 ` Yunsheng Lin 2023-11-09 1:41 ` Mina Almasry 2023-11-09 1:41 ` Mina Almasry 2023-11-07 7:45 ` Yunsheng Lin 2023-11-07 7:45 ` Yunsheng Lin 2023-11-09 8:44 ` Paolo Abeni 2023-11-09 8:44 ` Paolo Abeni 2023-11-06 2:44 ` [RFC PATCH v3 06/12] memory-provider: dmabuf devmem memory provider Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-06 21:02 ` Stanislav Fomichev 2023-11-06 21:02 ` Stanislav Fomichev 2023-11-06 23:49 ` David Ahern 2023-11-06 23:49 ` David Ahern 2023-11-08 0:02 ` Mina Almasry 2023-11-08 0:02 ` Mina Almasry 2023-11-08 0:10 ` David Ahern 2023-11-08 0:10 ` David Ahern 2023-11-10 23:16 ` Jakub Kicinski 2023-11-10 23:16 ` Jakub Kicinski 2023-11-13 4:54 ` Mina Almasry 2023-11-13 4:54 ` Mina Almasry 2023-11-06 2:44 ` [RFC PATCH v3 07/12] page-pool: device memory support Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-07 8:00 ` Yunsheng Lin 2023-11-07 8:00 ` Yunsheng Lin 2023-11-07 21:56 ` Mina Almasry 2023-11-07 21:56 ` Mina Almasry 2023-11-08 10:56 ` Yunsheng Lin 2023-11-08 10:56 ` Yunsheng Lin 2023-11-09 3:20 ` Mina Almasry 2023-11-09 3:20 ` Mina Almasry 2023-11-09 9:30 ` Yunsheng Lin 2023-11-09 9:30 ` Yunsheng Lin 2023-11-09 12:20 ` Mina Almasry 2023-11-09 12:20 ` Mina Almasry 2023-11-09 13:23 ` Yunsheng Lin 2023-11-09 13:23 ` Yunsheng Lin 2023-11-09 14:23 ` Christian König 2023-11-09 9:01 ` Paolo Abeni 2023-11-09 9:01 ` Paolo Abeni 2023-11-06 2:44 ` [RFC PATCH v3 08/12] net: support non paged skb frags Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-07 9:00 ` Yunsheng Lin 2023-11-07 9:00 ` Yunsheng Lin 2023-11-07 21:19 ` Mina Almasry 2023-11-07 21:19 ` Mina Almasry 2023-11-08 11:25 ` Yunsheng Lin 2023-11-08 11:25 ` Yunsheng Lin 2023-11-09 9:14 ` Paolo Abeni 2023-11-09 9:14 ` Paolo Abeni 2023-11-10 4:06 ` Mina Almasry 2023-11-10 4:06 ` Mina Almasry 2023-11-10 23:19 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-13 6:05 ` Mina Almasry 2023-11-13 6:05 ` Mina Almasry 2023-11-13 22:17 ` Jakub Kicinski 2023-11-13 22:17 ` Jakub Kicinski 2023-11-06 2:44 ` [RFC PATCH v3 09/12] net: add support for skbs with unreadable frags Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-06 18:47 ` Stanislav Fomichev 2023-11-06 18:47 ` Stanislav Fomichev 2023-11-06 19:34 ` David Ahern 2023-11-06 19:34 ` David Ahern 2023-11-06 20:31 ` Mina Almasry 2023-11-06 20:31 ` Mina Almasry 2023-11-06 21:59 ` Stanislav Fomichev 2023-11-06 21:59 ` Stanislav Fomichev 2023-11-06 22:18 ` Mina Almasry 2023-11-06 22:18 ` Mina Almasry 2023-11-06 22:59 ` Stanislav Fomichev 2023-11-06 22:59 ` Stanislav Fomichev 2023-11-06 23:14 ` Kaiyuan Zhang 2023-11-06 23:27 ` Mina Almasry 2023-11-06 23:27 ` Mina Almasry 2023-11-06 23:55 ` Stanislav Fomichev 2023-11-06 23:55 ` Stanislav Fomichev 2023-11-07 0:07 ` Willem de Bruijn 2023-11-07 0:07 ` Willem de Bruijn 2023-11-07 0:14 ` Stanislav Fomichev 2023-11-07 0:14 ` Stanislav Fomichev 2023-11-07 0:59 ` Stanislav Fomichev 2023-11-07 0:59 ` Stanislav Fomichev 2023-11-07 2:23 ` Willem de Bruijn 2023-11-07 2:23 ` Willem de Bruijn 2023-11-07 17:44 ` Stanislav Fomichev 2023-11-07 17:44 ` Stanislav Fomichev 2023-11-07 17:57 ` Willem de Bruijn 2023-11-07 17:57 ` Willem de Bruijn 2023-11-07 18:14 ` Stanislav Fomichev 2023-11-07 18:14 ` Stanislav Fomichev 2023-11-07 0:20 ` Mina Almasry 2023-11-07 0:20 ` Mina Almasry 2023-11-07 1:06 ` Stanislav Fomichev 2023-11-07 1:06 ` Stanislav Fomichev 2023-11-07 19:53 ` Mina Almasry 2023-11-07 19:53 ` Mina Almasry 2023-11-07 21:05 ` Stanislav Fomichev 2023-11-07 21:05 ` Stanislav Fomichev 2023-11-07 21:17 ` Eric Dumazet 2023-11-07 21:17 ` Eric Dumazet 2023-11-07 22:23 ` Stanislav Fomichev 2023-11-07 22:23 ` Stanislav Fomichev 2023-11-10 23:17 ` Jakub Kicinski 2023-11-10 23:17 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-07 1:09 ` David Ahern 2023-11-07 1:09 ` David Ahern 2023-11-06 23:37 ` David Ahern 2023-11-06 23:37 ` David Ahern 2023-11-07 0:03 ` Mina Almasry 2023-11-07 0:03 ` Mina Almasry 2023-11-06 20:56 ` Stanislav Fomichev 2023-11-06 20:56 ` Stanislav Fomichev 2023-11-07 0:16 ` David Ahern 2023-11-07 0:16 ` David Ahern 2023-11-07 0:23 ` Mina Almasry 2023-11-07 0:23 ` Mina Almasry 2023-11-08 14:43 ` David Laight 2023-11-08 14:43 ` David Laight 2023-11-06 2:44 ` [RFC PATCH v3 10/12] tcp: RX path for devmem TCP Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-06 18:44 ` Stanislav Fomichev 2023-11-06 18:44 ` Stanislav Fomichev 2023-11-06 19:29 ` Mina Almasry 2023-11-06 19:29 ` Mina Almasry 2023-11-06 21:14 ` Willem de Bruijn 2023-11-06 21:14 ` Willem de Bruijn 2023-11-06 22:34 ` Stanislav Fomichev 2023-11-06 22:34 ` Stanislav Fomichev 2023-11-06 22:55 ` Willem de Bruijn 2023-11-06 22:55 ` Willem de Bruijn 2023-11-06 23:32 ` Stanislav Fomichev 2023-11-06 23:32 ` Stanislav Fomichev 2023-11-06 23:55 ` David Ahern 2023-11-06 23:55 ` David Ahern 2023-11-07 0:02 ` Willem de Bruijn 2023-11-07 0:02 ` Willem de Bruijn 2023-11-07 23:55 ` Mina Almasry 2023-11-07 23:55 ` Mina Almasry 2023-11-08 0:01 ` David Ahern 2023-11-08 0:01 ` David Ahern 2023-11-09 2:39 ` Mina Almasry 2023-11-09 2:39 ` Mina Almasry 2023-11-09 16:07 ` Edward Cree 2023-11-09 16:07 ` Edward Cree 2023-12-08 20:12 ` Pavel Begunkov 2023-12-08 20:12 ` Pavel Begunkov 2023-11-09 11:05 ` Paolo Abeni 2023-11-09 11:05 ` Paolo Abeni 2023-11-10 23:16 ` Jakub Kicinski 2023-11-10 23:16 ` Jakub Kicinski 2023-12-08 20:28 ` Pavel Begunkov 2023-12-08 20:28 ` Pavel Begunkov 2023-12-08 20:09 ` Pavel Begunkov 2023-12-08 20:09 ` Pavel Begunkov 2023-11-06 21:17 ` Stanislav Fomichev 2023-11-06 21:17 ` Stanislav Fomichev 2023-11-08 15:36 ` Edward Cree 2023-11-08 15:36 ` Edward Cree 2023-11-09 10:52 ` Paolo Abeni 2023-11-09 10:52 ` Paolo Abeni 2023-11-10 23:19 ` Jakub Kicinski 2023-11-10 23:19 ` Jakub Kicinski 2023-11-06 2:44 ` Mina Almasry [this message] 2023-11-06 2:44 ` [RFC PATCH v3 11/12] net: add SO_DEVMEM_DONTNEED setsockopt to release RX pages Mina Almasry 2023-11-06 2:44 ` [RFC PATCH v3 12/12] selftests: add ncdevmem, netcat for devmem TCP Mina Almasry 2023-11-06 2:44 ` Mina Almasry 2023-11-09 11:03 ` Paolo Abeni 2023-11-09 11:03 ` Paolo Abeni 2023-11-10 23:13 ` Jakub Kicinski 2023-11-10 23:13 ` Jakub Kicinski 2023-11-11 2:27 ` Mina Almasry 2023-11-11 2:27 ` Mina Almasry 2023-11-11 2:35 ` Jakub Kicinski 2023-11-11 2:35 ` Jakub Kicinski 2023-11-13 4:08 ` Mina Almasry 2023-11-13 4:08 ` Mina Almasry 2023-11-13 22:20 ` Jakub Kicinski 2023-11-13 22:20 ` Jakub Kicinski 2023-11-10 23:17 ` Jakub Kicinski 2023-11-10 23:17 ` Jakub Kicinski 2023-11-07 15:18 ` [RFC PATCH v3 00/12] Device Memory TCP David Ahern 2023-11-07 15:18 ` David Ahern
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