From 644595f89620ba8446cc555be336d24a34464950 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Sun, 19 Feb 2012 17:51:59 -0800 Subject: compat: Handle COMPAT_USE_64BIT_TIME in net/socket.c Use helper functions aware of COMPAT_USE_64BIT_TIME to write struct timeval and struct timespec to userspace in net/socket.c. Signed-off-by: H. Peter Anvin --- net/socket.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index 28a96af484b4..5325d4c797c9 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2600,7 +2600,7 @@ void socket_seq_show(struct seq_file *seq) #ifdef CONFIG_COMPAT static int do_siocgstamp(struct net *net, struct socket *sock, - unsigned int cmd, struct compat_timeval __user *up) + unsigned int cmd, void __user *up) { mm_segment_t old_fs = get_fs(); struct timeval ktv; @@ -2609,15 +2609,14 @@ static int do_siocgstamp(struct net *net, struct socket *sock, set_fs(KERNEL_DS); err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); set_fs(old_fs); - if (!err) { - err = put_user(ktv.tv_sec, &up->tv_sec); - err |= __put_user(ktv.tv_usec, &up->tv_usec); - } + if (!err) + err = compat_put_timeval(up, &ktv); + return err; } static int do_siocgstampns(struct net *net, struct socket *sock, - unsigned int cmd, struct compat_timespec __user *up) + unsigned int cmd, void __user *up) { mm_segment_t old_fs = get_fs(); struct timespec kts; @@ -2626,10 +2625,9 @@ static int do_siocgstampns(struct net *net, struct socket *sock, set_fs(KERNEL_DS); err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); set_fs(old_fs); - if (!err) { - err = put_user(kts.tv_sec, &up->tv_sec); - err |= __put_user(kts.tv_nsec, &up->tv_nsec); - } + if (!err) + err = compat_put_timespec(up, &kts); + return err; } -- cgit v1.2.3 From 43db362d3adda9e0a915ddb9a8d1a41186e19179 Mon Sep 17 00:00:00 2001 From: Maciej Żenczykowski Date: Sun, 11 Mar 2012 12:51:50 +0000 Subject: net: get rid of some pointless casts to sockaddr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The following 4 functions: move_addr_to_kernel move_addr_to_user verify_iovec verify_compat_iovec are always effectively called with a sockaddr_storage. Make this explicit by changing their signature. This removes a large number of casts from sockaddr_storage to sockaddr. Signed-off-by: Maciej Żenczykowski Signed-off-by: David S. Miller --- include/linux/socket.h | 4 ++-- include/net/compat.h | 2 +- net/compat.c | 2 +- net/core/iovec.c | 2 +- net/socket.c | 36 ++++++++++++++---------------------- 5 files changed, 19 insertions(+), 27 deletions(-) (limited to 'net/socket.c') diff --git a/include/linux/socket.h b/include/linux/socket.h index d0e77f607a79..da2d3e2543f3 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -326,11 +326,11 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata, int offset, unsigned int len, __wsum *csump); -extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode); +extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode); extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len); extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata, int offset, int len); -extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr); +extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); struct timespec; diff --git a/include/net/compat.h b/include/net/compat.h index 9ee75edcc295..a974ae92d182 100644 --- a/include/net/compat.h +++ b/include/net/compat.h @@ -41,7 +41,7 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *); #endif /* defined(CONFIG_COMPAT) */ extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *); -extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int); +extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr_storage *, int); extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned); extern asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *, unsigned, unsigned); diff --git a/net/compat.c b/net/compat.c index 6def90e0a112..64b4515a64e6 100644 --- a/net/compat.c +++ b/net/compat.c @@ -79,7 +79,7 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) /* I've named the args so it is easy to tell whose space the pointers are in. */ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, - struct sockaddr *kern_address, int mode) + struct sockaddr_storage *kern_address, int mode) { int tot_len; diff --git a/net/core/iovec.c b/net/core/iovec.c index c40f27e7d208..7e7aeb01de45 100644 --- a/net/core/iovec.c +++ b/net/core/iovec.c @@ -35,7 +35,7 @@ * in any case. */ -int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode) +int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode) { int size, ct, err; diff --git a/net/socket.c b/net/socket.c index 28a96af484b4..12a48d846223 100644 --- a/net/socket.c +++ b/net/socket.c @@ -181,7 +181,7 @@ static DEFINE_PER_CPU(int, sockets_in_use); * invalid addresses -EFAULT is returned. On a success 0 is returned. */ -int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) +int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) { if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) return -EINVAL; @@ -209,7 +209,7 @@ int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) * specified. Zero is returned for a success. */ -static int move_addr_to_user(struct sockaddr *kaddr, int klen, +static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, void __user *uaddr, int __user *ulen) { int err; @@ -1449,7 +1449,7 @@ SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock) { - err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); + err = move_addr_to_kernel(umyaddr, addrlen, &address); if (err >= 0) { err = security_socket_bind(sock, (struct sockaddr *)&address, @@ -1556,7 +1556,7 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, err = -ECONNABORTED; goto out_fd; } - err = move_addr_to_user((struct sockaddr *)&address, + err = move_addr_to_user(&address, len, upeer_sockaddr, upeer_addrlen); if (err < 0) goto out_fd; @@ -1605,7 +1605,7 @@ SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; - err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); + err = move_addr_to_kernel(uservaddr, addrlen, &address); if (err < 0) goto out_put; @@ -1645,7 +1645,7 @@ SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); if (err) goto out_put; - err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); + err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); out_put: fput_light(sock->file, fput_needed); @@ -1677,7 +1677,7 @@ SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, sock->ops->getname(sock, (struct sockaddr *)&address, &len, 1); if (!err) - err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, + err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); fput_light(sock->file, fput_needed); } @@ -1716,7 +1716,7 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, msg.msg_controllen = 0; msg.msg_namelen = 0; if (addr) { - err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); + err = move_addr_to_kernel(addr, addr_len, &address); if (err < 0) goto out_put; msg.msg_name = (struct sockaddr *)&address; @@ -1779,7 +1779,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, err = sock_recvmsg(sock, &msg, size, flags); if (err >= 0 && addr != NULL) { - err2 = move_addr_to_user((struct sockaddr *)&address, + err2 = move_addr_to_user(&address, msg.msg_namelen, addr, addr_len); if (err2 < 0) err = err2; @@ -1933,13 +1933,9 @@ static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, /* This will also move the address data into kernel space */ if (MSG_CMSG_COMPAT & flags) { - err = verify_compat_iovec(msg_sys, iov, - (struct sockaddr *)&address, - VERIFY_READ); + err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); } else - err = verify_iovec(msg_sys, iov, - (struct sockaddr *)&address, - VERIFY_READ); + err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); if (err < 0) goto out_freeiov; total_len = err; @@ -2143,13 +2139,9 @@ static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, uaddr = (__force void __user *)msg_sys->msg_name; uaddr_len = COMPAT_NAMELEN(msg); if (MSG_CMSG_COMPAT & flags) { - err = verify_compat_iovec(msg_sys, iov, - (struct sockaddr *)&addr, - VERIFY_WRITE); + err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); } else - err = verify_iovec(msg_sys, iov, - (struct sockaddr *)&addr, - VERIFY_WRITE); + err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); if (err < 0) goto out_freeiov; total_len = err; @@ -2166,7 +2158,7 @@ static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, len = err; if (uaddr != NULL) { - err = move_addr_to_user((struct sockaddr *)&addr, + err = move_addr_to_user(&addr, msg_sys->msg_namelen, uaddr, uaddr_len); if (err < 0) -- cgit v1.2.3 From 35f9c09fe9c72eb8ca2b8e89a593e1c151f28fc2 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 5 Apr 2012 03:05:35 +0000 Subject: tcp: tcp_sendpages() should call tcp_push() once MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 2f533844242 (tcp: allow splice() to build full TSO packets) added a regression for splice() calls using SPLICE_F_MORE. We need to call tcp_flush() at the end of the last page processed in tcp_sendpages(), or else transmits can be deferred and future sends stall. Add a new internal flag, MSG_SENDPAGE_NOTLAST, acting like MSG_MORE, but with different semantic. For all sendpage() providers, its a transparent change. Only sock_sendpage() and tcp_sendpages() can differentiate the two different flags provided by pipe_to_sendpage() Reported-by: Tom Herbert Cc: Nandita Dukkipati Cc: Neal Cardwell Cc: Tom Herbert Cc: Yuchung Cheng Cc: H.K. Jerry Chu Cc: Maciej Żenczykowski Cc: Mahesh Bandewar Cc: Ilpo Järvinen Signed-off-by: Eric Dumazet com> Signed-off-by: David S. Miller --- fs/splice.c | 5 ++++- include/linux/socket.h | 2 +- net/ipv4/tcp.c | 2 +- net/socket.c | 6 +++--- 4 files changed, 9 insertions(+), 6 deletions(-) (limited to 'net/socket.c') diff --git a/fs/splice.c b/fs/splice.c index 5f883de7ef3a..f8476841eb04 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -30,6 +30,7 @@ #include #include #include +#include /* * Attempt to steal a page from a pipe buffer. This should perhaps go into @@ -690,7 +691,9 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe, if (!likely(file->f_op && file->f_op->sendpage)) return -EINVAL; - more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len; + more = (sd->flags & SPLICE_F_MORE) ? MSG_MORE : 0; + if (sd->len < sd->total_len) + more |= MSG_SENDPAGE_NOTLAST; return file->f_op->sendpage(file, buf->page, buf->offset, sd->len, &pos, more); } diff --git a/include/linux/socket.h b/include/linux/socket.h index da2d3e2543f3..b84bbd48b874 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -265,7 +265,7 @@ struct ucred { #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ #define MSG_MORE 0x8000 /* Sender will send more */ #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */ - +#define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */ #define MSG_EOF MSG_FIN #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2ff6f45a76f4..5d54ed30e821 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -860,7 +860,7 @@ wait_for_memory: } out: - if (copied && !(flags & MSG_MORE)) + if (copied && !(flags & MSG_SENDPAGE_NOTLAST)) tcp_push(sk, flags, mss_now, tp->nonagle); return copied; diff --git a/net/socket.c b/net/socket.c index 484cc6953fc6..851edcd6b098 100644 --- a/net/socket.c +++ b/net/socket.c @@ -811,9 +811,9 @@ static ssize_t sock_sendpage(struct file *file, struct page *page, sock = file->private_data; - flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; - if (more) - flags |= MSG_MORE; + flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; + /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ + flags |= more; return kernel_sendpage(sock, page, offset, size, flags); } -- cgit v1.2.3