[RFC 02/12] skbuff: pass a struct ubuf_info in msghdr
From: Pavel Begunkov <asml.silence@gmail.com>
Date: 2021-11-30 15:21:00
Also in:
io-uring, lkml
Subsystem:
filesystems (vfs and infrastructure), networking [general], networking [sockets], the rest · Maintainers:
Alexander Viro, Christian Brauner, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
Instead of the net stack managing ubuf_info, allow to pass it in from outside in a struct msghdr (in-kernel structure), so io_uring can make use of it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> --- fs/io_uring.c | 2 ++ include/linux/socket.h | 1 + net/compat.c | 1 + net/socket.c | 3 +++ 4 files changed, 7 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 72da3a75521a..59380e3454ad 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c@@ -4911,6 +4911,7 @@ static int io_send(struct io_kiocb *req, unsigned int issue_flags) msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; + msg.msg_ubuf = NULL; flags = req->sr_msg.msg_flags; if (issue_flags & IO_URING_F_NONBLOCK)
@@ -5157,6 +5158,7 @@ static int io_recv(struct io_kiocb *req, unsigned int issue_flags) msg.msg_namelen = 0; msg.msg_iocb = NULL; msg.msg_flags = 0; + msg.msg_ubuf = NULL; flags = req->sr_msg.msg_flags; if (force_nonblock)
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 8ef26d89ef49..6bd2c6b0c6f2 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h@@ -65,6 +65,7 @@ struct msghdr { __kernel_size_t msg_controllen; /* ancillary data buffer length */ unsigned int msg_flags; /* flags on received message */ struct kiocb *msg_iocb; /* ptr to iocb for async requests */ + struct ubuf_info *msg_ubuf; }; struct user_msghdr {
diff --git a/net/compat.c b/net/compat.c
index 210fc3b4d0d8..6cd2e7683dd0 100644
--- a/net/compat.c
+++ b/net/compat.c@@ -80,6 +80,7 @@ int __get_compat_msghdr(struct msghdr *kmsg, return -EMSGSIZE; kmsg->msg_iocb = NULL; + kmsg->msg_ubuf = NULL; *ptr = msg.msg_iov; *len = msg.msg_iovlen; return 0;
diff --git a/net/socket.c b/net/socket.c
index 7f64a6eccf63..0a29b616a38c 100644
--- a/net/socket.c
+++ b/net/socket.c@@ -2023,6 +2023,7 @@ int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; + msg.msg_ubuf = NULL; if (addr) { err = move_addr_to_kernel(addr, addr_len, &address); if (err < 0)
@@ -2088,6 +2089,7 @@ int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, msg.msg_namelen = 0; msg.msg_iocb = NULL; msg.msg_flags = 0; + msg.msg_ubuf = NULL; if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; err = sock_recvmsg(sock, &msg, flags);
@@ -2326,6 +2328,7 @@ int __copy_msghdr_from_user(struct msghdr *kmsg, return -EMSGSIZE; kmsg->msg_iocb = NULL; + kmsg->msg_ubuf = NULL; *uiov = msg.msg_iov; *nsegs = msg.msg_iovlen; return 0;
--
2.34.0