* [PATCH 0/3] net: y2038-safe socket timeout options @ 2019-01-08 5:22 Deepa Dinamani 2019-01-08 5:22 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani 2019-01-08 5:22 ` [PATCH 3/3] sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW Deepa Dinamani 0 siblings, 2 replies; 7+ messages in thread From: Deepa Dinamani @ 2019-01-08 5:22 UTC (permalink / raw) To: davem, linux-kernel Cc: netdev, arnd, y2038, ccaulfie, cluster-devel, deller, linux-alpha, linux-arch, linux-mips, linux-parisc, linuxppc-dev, paulus, ralf, rth, sparclinux The series is aimed at adding y2038-safe timeout options: SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW. This is similar to the previous series adding y2038-safe SO_TIMESTAMP* options. The series needs to be applied after the socket timestamp series: https://lore.kernel.org/lkml/20190108032657.8331-1-deepa.kernel@gmail.com Deepa Dinamani (3): socket: Use old_timeval types for socket timeouts socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW arch/alpha/include/uapi/asm/socket.h | 13 ++++- arch/mips/include/uapi/asm/socket.h | 13 ++++- arch/parisc/include/uapi/asm/socket.h | 13 ++++- arch/powerpc/include/uapi/asm/socket.h | 4 +- arch/sparc/include/uapi/asm/socket.h | 13 ++++- fs/dlm/lowcomms.c | 4 +- include/uapi/asm-generic/socket.h | 13 ++++- net/compat.c | 14 ++--- net/core/sock.c | 78 +++++++++++++++++++------- net/vmw_vsock/af_vsock.c | 4 +- 10 files changed, 126 insertions(+), 43 deletions(-) base-commit: a4983672f9ca4c8393f26b6b80710e6c78886b8c prerequisite-patch-id: a03ec6afbdd328cd90557f7ee6675016a5f5c653 prerequisite-patch-id: 724d26c3036e6f3a38f810c2f10db3f7ddbf843b prerequisite-patch-id: 14017867b6eb4d5231eec1b563edcd840a1be26e prerequisite-patch-id: 8df0edfd9b973ff5aae91c7709c8223be096a5bc prerequisite-patch-id: 9850ad48d41bf068f074c0dd3c7610fb7177c89f prerequisite-patch-id: bd31f35bba11902d1cc3e8726492b54df34b5c59 prerequisite-patch-id: ea4b005c5ad188a4e0899d728357c114710a3a8e prerequisite-patch-id: cc3ee912c1ee1ea502ca079de81236a467950501 -- 2.17.1 Cc: ccaulfie@redhat.com Cc: cluster-devel@redhat.com Cc: davem@davemloft.net Cc: deller@gmx.de Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: rth@twiddle.net Cc: sparclinux@vger.kernel.org ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes 2019-01-08 5:22 [PATCH 0/3] net: y2038-safe socket timeout options Deepa Dinamani @ 2019-01-08 5:22 ` Deepa Dinamani 2019-01-08 20:03 ` Arnd Bergmann 2019-01-08 5:22 ` [PATCH 3/3] sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW Deepa Dinamani 1 sibling, 1 reply; 7+ messages in thread From: Deepa Dinamani @ 2019-01-08 5:22 UTC (permalink / raw) To: davem, linux-kernel Cc: netdev, arnd, y2038, ccaulfie, deller, paulus, ralf, rth, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, linux-parisc, sparclinux SO_RCVTIMEO and SO_SNDTIMEO socket options use struct timeval as the time format. struct timeval is not y2038 safe. The subsequent patches in the series add support for new socket timeout options with _NEW suffix that are y2038 safe. Rename the existing options with _OLD suffix forms so that the right option is enabled for userspace applications according to the architecture and time_t definition of libc. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: ccaulfie@redhat.com Cc: deller@gmx.de Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: rth@twiddle.net Cc: cluster-devel@redhat.com Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: sparclinux@vger.kernel.org --- arch/alpha/include/uapi/asm/socket.h | 7 +++++-- arch/mips/include/uapi/asm/socket.h | 6 ++++-- arch/parisc/include/uapi/asm/socket.h | 6 ++++-- arch/powerpc/include/uapi/asm/socket.h | 4 ++-- arch/sparc/include/uapi/asm/socket.h | 6 ++++-- fs/dlm/lowcomms.c | 4 ++-- include/net/sock.h | 4 ++-- include/uapi/asm-generic/socket.h | 6 ++++-- net/compat.c | 4 ++-- net/core/sock.c | 8 ++++---- 10 files changed, 33 insertions(+), 22 deletions(-) diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h index da08412bd49f..ea3ba981d8a0 100644 --- a/arch/alpha/include/uapi/asm/socket.h +++ b/arch/alpha/include/uapi/asm/socket.h @@ -31,8 +31,8 @@ #define SO_RCVBUFFORCE 0x100b #define SO_RCVLOWAT 0x1010 #define SO_SNDLOWAT 0x1011 -#define SO_RCVTIMEO 0x1012 -#define SO_SNDTIMEO 0x1013 +#define SO_RCVTIMEO_OLD 0x1012 +#define SO_SNDTIMEO_OLD 0x1013 #define SO_ACCEPTCONN 0x1014 #define SO_PROTOCOL 0x1028 #define SO_DOMAIN 0x1029 @@ -120,6 +120,9 @@ #if !defined(__KERNEL__) +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD + #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h index 1e48f67f1052..4dde20d64690 100644 --- a/arch/mips/include/uapi/asm/socket.h +++ b/arch/mips/include/uapi/asm/socket.h @@ -39,8 +39,8 @@ #define SO_RCVBUF 0x1002 /* Receive buffer. */ #define SO_SNDLOWAT 0x1003 /* send low-water mark */ #define SO_RCVLOWAT 0x1004 /* receive low-water mark */ -#define SO_SNDTIMEO 0x1005 /* send timeout */ -#define SO_RCVTIMEO 0x1006 /* receive timeout */ +#define SO_SNDTIMEO_OLD 0x1005 /* send timeout */ +#define SO_RCVTIMEO_OLD 0x1006 /* receive timeout */ #define SO_ACCEPTCONN 0x1009 #define SO_PROTOCOL 0x1028 /* protocol type */ #define SO_DOMAIN 0x1029 /* domain/socket family */ @@ -130,6 +130,8 @@ #if !defined(__KERNEL__) +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h index e8d6cf20f9a4..546937fa0d8b 100644 --- a/arch/parisc/include/uapi/asm/socket.h +++ b/arch/parisc/include/uapi/asm/socket.h @@ -22,8 +22,8 @@ #define SO_RCVBUFFORCE 0x100b #define SO_SNDLOWAT 0x1003 #define SO_RCVLOWAT 0x1004 -#define SO_SNDTIMEO 0x1005 -#define SO_RCVTIMEO 0x1006 +#define SO_SNDTIMEO_OLD 0x1005 +#define SO_RCVTIMEO_OLD 0x1006 #define SO_ERROR 0x1007 #define SO_TYPE 0x1008 #define SO_PROTOCOL 0x1028 @@ -111,6 +111,8 @@ #if !defined(__KERNEL__) +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD diff --git a/arch/powerpc/include/uapi/asm/socket.h b/arch/powerpc/include/uapi/asm/socket.h index 94de465e0920..12aa0c43e775 100644 --- a/arch/powerpc/include/uapi/asm/socket.h +++ b/arch/powerpc/include/uapi/asm/socket.h @@ -11,8 +11,8 @@ #define SO_RCVLOWAT 16 #define SO_SNDLOWAT 17 -#define SO_RCVTIMEO 18 -#define SO_SNDTIMEO 19 +#define SO_RCVTIMEO_OLD 18 +#define SO_SNDTIMEO_OLD 19 #define SO_PASSCRED 20 #define SO_PEERCRED 21 diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h index fc65bf6b6440..bdc396211627 100644 --- a/arch/sparc/include/uapi/asm/socket.h +++ b/arch/sparc/include/uapi/asm/socket.h @@ -21,8 +21,8 @@ #define SO_BSDCOMPAT 0x0400 #define SO_RCVLOWAT 0x0800 #define SO_SNDLOWAT 0x1000 -#define SO_RCVTIMEO 0x2000 -#define SO_SNDTIMEO 0x4000 +#define SO_RCVTIMEO_OLD 0x2000 +#define SO_SNDTIMEO_OLD 0x4000 #define SO_ACCEPTCONN 0x8000 #define SO_SNDBUF 0x1001 @@ -112,6 +112,8 @@ #if !defined(__KERNEL__) +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 76976d6e50f9..c98ad9777ad9 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -1089,12 +1089,12 @@ static void sctp_connect_to_sock(struct connection *con) * since O_NONBLOCK argument in connect() function does not work here, * then, we should restore the default value of this attribute. */ - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, sizeof(tv)); result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len, 0); memset(&tv, 0, sizeof(tv)); - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, sizeof(tv)); if (result == -EINPROGRESS) diff --git a/include/net/sock.h b/include/net/sock.h index 6679f3c120b0..98965a9a2bf4 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -292,8 +292,8 @@ struct sock_common { * @sk_peer_pid: &struct pid for this socket's peer * @sk_peer_cred: %SO_PEERCRED setting * @sk_rcvlowat: %SO_RCVLOWAT setting - * @sk_rcvtimeo: %SO_RCVTIMEO setting - * @sk_sndtimeo: %SO_SNDTIMEO setting + * @sk_rcvtimeo: %SO_RCVTIMEO_OLD setting + * @sk_sndtimeo: %SO_SNDTIMEO_OLD setting * @sk_txhash: computed flow hash for use on transmit * @sk_filter: socket filtering instructions * @sk_timer: sock cleanup timer diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h index 94e618a4a43f..9e370586fb19 100644 --- a/include/uapi/asm-generic/socket.h +++ b/include/uapi/asm-generic/socket.h @@ -30,8 +30,8 @@ #define SO_PEERCRED 17 #define SO_RCVLOWAT 18 #define SO_SNDLOWAT 19 -#define SO_RCVTIMEO 20 -#define SO_SNDTIMEO 21 +#define SO_RCVTIMEO_OLD 20 +#define SO_SNDTIMEO_OLD 21 #endif /* Security levels - as per NRL IPv6 - don't actually do anything */ @@ -114,6 +114,8 @@ #if !defined(__KERNEL__) +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__)) /* on 64-bit and x32, avoid the ?: operator */ #define SO_TIMESTAMP SO_TIMESTAMP_OLD diff --git a/net/compat.c b/net/compat.c index cbc15f65033c..19e047f70f64 100644 --- a/net/compat.c +++ b/net/compat.c @@ -378,7 +378,7 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname, return do_set_attach_filter(sock, level, optname, optval, optlen); if (!COMPAT_USE_64BIT_TIME && - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) return do_set_sock_timeout(sock, level, optname, optval, optlen); return sock_setsockopt(sock, level, optname, optval, optlen); @@ -450,7 +450,7 @@ static int compat_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { if (!COMPAT_USE_64BIT_TIME && - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) return do_get_sock_timeout(sock, level, optname, optval, optlen); return sock_getsockopt(sock, level, optname, optval, optlen); } diff --git a/net/core/sock.c b/net/core/sock.c index af0fb33624e2..42914ca3186c 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -889,11 +889,11 @@ int sock_setsockopt(struct socket *sock, int level, int optname, sk->sk_rcvlowat = val ? : 1; break; - case SO_RCVTIMEO: + case SO_RCVTIMEO_OLD: ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen); break; - case SO_SNDTIMEO: + case SO_SNDTIMEO_OLD: ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen); break; @@ -1222,7 +1222,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, v.val = sk->sk_tsflags; break; - case SO_RCVTIMEO: + case SO_RCVTIMEO_OLD: lv = sizeof(struct __kernel_old_timeval); if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) { v.tm.tv_sec = 0; @@ -1233,7 +1233,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, } break; - case SO_SNDTIMEO: + case SO_SNDTIMEO_OLD: lv = sizeof(struct __kernel_old_timeval); if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) { v.tm.tv_sec = 0; -- 2.17.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes 2019-01-08 5:22 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani @ 2019-01-08 20:03 ` Arnd Bergmann 2019-01-08 20:09 ` [PATCH] socket: move compat timeout handling into sock.c Arnd Bergmann 2019-01-08 21:19 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani 0 siblings, 2 replies; 7+ messages in thread From: Arnd Bergmann @ 2019-01-08 20:03 UTC (permalink / raw) To: Deepa Dinamani Cc: David Miller, Linux Kernel Mailing List, Networking, y2038 Mailman List, ccaulfie, Helge Deller, Paul Mackerras, Ralf Baechle, Richard Henderson, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, Parisc List, sparclinux On Tue, Jan 8, 2019 at 6:24 AM Deepa Dinamani <deepa.kernel@gmail.com> wrote: > > SO_RCVTIMEO and SO_SNDTIMEO socket options use struct timeval > as the time format. struct timeval is not y2038 safe. > The subsequent patches in the series add support for new socket > timeout options with _NEW suffix that are y2038 safe. > Rename the existing options with _OLD suffix forms so that the > right option is enabled for userspace applications according > to the architecture and time_t definition of libc. > > Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Looks good overall. A few minor concerns: The description above makes it sound like there is a bug with y2038-safety in this particular interface, which I think is just not what you meant, as the change is only needed for compatiblity with new C libraries that work around the y2038 problem in general by changing their timeval definition. > diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c > index 76976d6e50f9..c98ad9777ad9 100644 > --- a/fs/dlm/lowcomms.c > +++ b/fs/dlm/lowcomms.c > @@ -1089,12 +1089,12 @@ static void sctp_connect_to_sock(struct connection *con) > * since O_NONBLOCK argument in connect() function does not work here, > * then, we should restore the default value of this attribute. > */ > - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, > + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, > sizeof(tv)); > result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len, > 0); > memset(&tv, 0, sizeof(tv)); > - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, > + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, > sizeof(tv)); > > if (result == -EINPROGRESS) It took me a bit to realize there that this is safe as well even if we don't use SO_SNDTIMEO_NEW, for the same reason. > --- a/net/compat.c > +++ b/net/compat.c > @@ -378,7 +378,7 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname, > return do_set_attach_filter(sock, level, optname, > optval, optlen); > if (!COMPAT_USE_64BIT_TIME && > - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) > + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) > return do_set_sock_timeout(sock, level, optname, optval, optlen); > > return sock_setsockopt(sock, level, optname, optval, optlen); > @@ -450,7 +450,7 @@ static int compat_sock_getsockopt(struct socket *sock, int level, int optname, > char __user *optval, int __user *optlen) > { > if (!COMPAT_USE_64BIT_TIME && > - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) > + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) > return do_get_sock_timeout(sock, level, optname, optval, optlen); > return sock_getsockopt(sock, level, optname, optval, optlen); > } I looked at the original code and noticed that it's horrible, which of course is not your fault, but I wonder if we should just fix it now to avoid that get_fs()/set_fs() hack, since that code mostly implements what you also have in your patch 3 (which is done more nicely). I'll follow up with a patch to demonstrate what I mean here. Your third patch will then just have to add another code path so we can handle all of old_timespec32 (for existing 32-bit user space), __kernel_old_timespec (for sparc64) and __kernel_sock_timeval (for everything else). Arnd ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH] socket: move compat timeout handling into sock.c 2019-01-08 20:03 ` Arnd Bergmann @ 2019-01-08 20:09 ` Arnd Bergmann 2019-01-08 21:29 ` Deepa Dinamani 2019-01-08 21:19 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani 1 sibling, 1 reply; 7+ messages in thread From: Arnd Bergmann @ 2019-01-08 20:09 UTC (permalink / raw) To: Deepa Dinamani Cc: David Miller, Linux Kernel Mailing List, Networking, y2038 Mailman List, ccaulfie, Helge Deller, Paul Mackerras, Ralf Baechle, Richard Henderson, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, Parisc List, sparclinux, Arnd Bergmann This is a cleanup to prepare for the addition of 64-bit time_t in O_SNDTIMEO/O_RCVTIMEO. The existing compat handler seems unnecessarily complex and error-prone, moving it all into the main setsockopt()/getsockopt() implementation requires half as much code and is easier to extend. 32-bit user space can now use old_timeval32 on both 32-bit and 64-bit machines, while 64-bit code can use __old_kernel_timeval. Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- net/compat.c | 66 +------------------------------------------------ net/core/sock.c | 65 +++++++++++++++++++++++++++++++----------------- 2 files changed, 44 insertions(+), 87 deletions(-) diff --git a/net/compat.c b/net/compat.c index 959d1c51826d..ce8f6e8cdcd2 100644 --- a/net/compat.c +++ b/net/compat.c @@ -348,28 +348,6 @@ static int do_set_attach_filter(struct socket *sock, int level, int optname, sizeof(struct sock_fprog)); } -static int do_set_sock_timeout(struct socket *sock, int level, - int optname, char __user *optval, unsigned int optlen) -{ - struct compat_timeval __user *up = (struct compat_timeval __user *)optval; - struct timeval ktime; - mm_segment_t old_fs; - int err; - - if (optlen < sizeof(*up)) - return -EINVAL; - if (!access_ok(up, sizeof(*up)) || - __get_user(ktime.tv_sec, &up->tv_sec) || - __get_user(ktime.tv_usec, &up->tv_usec)) - return -EFAULT; - old_fs = get_fs(); - set_fs(KERNEL_DS); - err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); - set_fs(old_fs); - - return err; -} - static int compat_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { @@ -377,10 +355,6 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname, optname == SO_ATTACH_REUSEPORT_CBPF) return do_set_attach_filter(sock, level, optname, optval, optlen); - if (!COMPAT_USE_64BIT_TIME && - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) - return do_set_sock_timeout(sock, level, optname, optval, optlen); - return sock_setsockopt(sock, level, optname, optval, optlen); } @@ -417,44 +391,6 @@ COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, return __compat_sys_setsockopt(fd, level, optname, optval, optlen); } -static int do_get_sock_timeout(struct socket *sock, int level, int optname, - char __user *optval, int __user *optlen) -{ - struct compat_timeval __user *up; - struct timeval ktime; - mm_segment_t old_fs; - int len, err; - - up = (struct compat_timeval __user *) optval; - if (get_user(len, optlen)) - return -EFAULT; - if (len < sizeof(*up)) - return -EINVAL; - len = sizeof(ktime); - old_fs = get_fs(); - set_fs(KERNEL_DS); - err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); - set_fs(old_fs); - - if (!err) { - if (put_user(sizeof(*up), optlen) || - !access_ok(up, sizeof(*up)) || - __put_user(ktime.tv_sec, &up->tv_sec) || - __put_user(ktime.tv_usec, &up->tv_usec)) - err = -EFAULT; - } - return err; -} - -static int compat_sock_getsockopt(struct socket *sock, int level, int optname, - char __user *optval, int __user *optlen) -{ - if (!COMPAT_USE_64BIT_TIME && - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) - return do_get_sock_timeout(sock, level, optname, optval, optlen); - return sock_getsockopt(sock, level, optname, optval, optlen); -} - int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) { struct compat_timeval __user *ctv; @@ -527,7 +463,7 @@ static int __compat_sys_getsockopt(int fd, int level, int optname, } if (level == SOL_SOCKET) - err = compat_sock_getsockopt(sock, level, + err = sock_getsockopt(sock, level, optname, optval, optlen); else if (sock->ops->compat_getsockopt) err = sock->ops->compat_getsockopt(sock, level, diff --git a/net/core/sock.c b/net/core/sock.c index 6aa2e7e0b4fb..e50b9a2abc92 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -335,14 +335,48 @@ int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) } EXPORT_SYMBOL(__sk_backlog_rcv); +static int sock_get_timeout(long timeo, void *optval) +{ + struct __kernel_old_timeval tv; + + if (timeo == MAX_SCHEDULE_TIMEOUT) { + tv.tv_sec = 0; + tv.tv_usec = 0; + } else { + tv.tv_sec = timeo / HZ; + tv.tv_usec = ((timeo % HZ) * USEC_PER_SEC) / HZ; + } + + if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) { + struct old_timeval32 tv32 = { tv.tv_sec, tv.tv_usec }; + *(struct old_timeval32 *)optval = tv32; + return sizeof(tv32); + } + + *(struct __kernel_old_timeval *)optval = tv; + return sizeof(tv); +} + static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen) { - struct timeval tv; + struct __kernel_old_timeval tv; - if (optlen < sizeof(tv)) - return -EINVAL; - if (copy_from_user(&tv, optval, sizeof(tv))) - return -EFAULT; + if (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) { + struct old_timeval32 tv32; + + if (optlen < sizeof(tv32)) + return -EINVAL; + + if (copy_from_user(&tv, optval, sizeof(tv))) + return -EFAULT; + tv.tv_sec = tv32.tv_sec; + tv.tv_usec = tv32.tv_usec; + } else { + if (optlen < sizeof(tv)) + return -EINVAL; + if (copy_from_user(&tv, optval, sizeof(tv))) + return -EFAULT; + } if (tv.tv_usec < 0 || tv.tv_usec >= USEC_PER_SEC) return -EDOM; @@ -1099,7 +1133,8 @@ int sock_getsockopt(struct socket *sock, int level, int optname, int val; u64 val64; struct linger ling; - struct timeval tm; + struct old_timeval32 tm32; + struct __kernel_old_timeval tm; struct sock_txtime txtime; } v; @@ -1200,25 +1235,11 @@ int sock_getsockopt(struct socket *sock, int level, int optname, break; case SO_RCVTIMEO: - lv = sizeof(struct timeval); - if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) { - v.tm.tv_sec = 0; - v.tm.tv_usec = 0; - } else { - v.tm.tv_sec = sk->sk_rcvtimeo / HZ; - v.tm.tv_usec = ((sk->sk_rcvtimeo % HZ) * USEC_PER_SEC) / HZ; - } + lv = sock_get_timeout(sk->sk_rcvtimeo, optval); break; case SO_SNDTIMEO: - lv = sizeof(struct timeval); - if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) { - v.tm.tv_sec = 0; - v.tm.tv_usec = 0; - } else { - v.tm.tv_sec = sk->sk_sndtimeo / HZ; - v.tm.tv_usec = ((sk->sk_sndtimeo % HZ) * USEC_PER_SEC) / HZ; - } + lv = sock_get_timeout(sk->sk_sndtimeo, optval); break; case SO_RCVLOWAT: -- 2.20.0 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH] socket: move compat timeout handling into sock.c 2019-01-08 20:09 ` [PATCH] socket: move compat timeout handling into sock.c Arnd Bergmann @ 2019-01-08 21:29 ` Deepa Dinamani 0 siblings, 0 replies; 7+ messages in thread From: Deepa Dinamani @ 2019-01-08 21:29 UTC (permalink / raw) To: Arnd Bergmann Cc: David Miller, Linux Kernel Mailing List, Networking, y2038 Mailman List, ccaulfie, Helge Deller, Paul Mackerras, Ralf Baechle, Richard Henderson, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, Parisc List, sparclinux On Tue, Jan 8, 2019 at 12:10 PM Arnd Bergmann <arnd@arndb.de> wrote: > > This is a cleanup to prepare for the addition of 64-bit time_t > in O_SNDTIMEO/O_RCVTIMEO. The existing compat handler seems > unnecessarily complex and error-prone, moving it all into the > main setsockopt()/getsockopt() implementation requires half > as much code and is easier to extend. > > 32-bit user space can now use old_timeval32 on both 32-bit > and 64-bit machines, while 64-bit code can use > __old_kernel_timeval. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> This will make the other series so much nicer. Thank you. Acked-by: Deepa Dinamani <deepa.kernel@gmail.com> ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes 2019-01-08 20:03 ` Arnd Bergmann 2019-01-08 20:09 ` [PATCH] socket: move compat timeout handling into sock.c Arnd Bergmann @ 2019-01-08 21:19 ` Deepa Dinamani 1 sibling, 0 replies; 7+ messages in thread From: Deepa Dinamani @ 2019-01-08 21:19 UTC (permalink / raw) To: Arnd Bergmann Cc: David Miller, Linux Kernel Mailing List, Networking, y2038 Mailman List, ccaulfie, Helge Deller, Paul Mackerras, Ralf Baechle, Richard Henderson, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, Parisc List, sparclinux On Tue, Jan 8, 2019 at 12:04 PM Arnd Bergmann <arnd@arndb.de> wrote: > > On Tue, Jan 8, 2019 at 6:24 AM Deepa Dinamani <deepa.kernel@gmail.com> wrote: > > > > SO_RCVTIMEO and SO_SNDTIMEO socket options use struct timeval > > as the time format. struct timeval is not y2038 safe. > > The subsequent patches in the series add support for new socket > > timeout options with _NEW suffix that are y2038 safe. > > Rename the existing options with _OLD suffix forms so that the > > right option is enabled for userspace applications according > > to the architecture and time_t definition of libc. > > > > Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> > > Looks good overall. A few minor concerns: > > The description above makes it sound like there is a bug with y2038-safety > in this particular interface, which I think is just not what you meant, > as the change is only needed for compatiblity with new C libraries > that work around the y2038 problem in general by changing their > timeval definition. Right, there is y2038 safety issue, just the libc part that needs to be handled. I will fix the commit text. > > diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c > > index 76976d6e50f9..c98ad9777ad9 100644 > > --- a/fs/dlm/lowcomms.c > > +++ b/fs/dlm/lowcomms.c > > @@ -1089,12 +1089,12 @@ static void sctp_connect_to_sock(struct connection *con) > > * since O_NONBLOCK argument in connect() function does not work here, > > * then, we should restore the default value of this attribute. > > */ > > - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, > > + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, > > sizeof(tv)); > > result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len, > > 0); > > memset(&tv, 0, sizeof(tv)); > > - kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv, > > + kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv, > > sizeof(tv)); > > > > if (result == -EINPROGRESS) > > It took me a bit to realize there that this is safe as well even if > we don't use SO_SNDTIMEO_NEW, for the same reason. Correct. > > --- a/net/compat.c > > +++ b/net/compat.c > > @@ -378,7 +378,7 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname, > > return do_set_attach_filter(sock, level, optname, > > optval, optlen); > > if (!COMPAT_USE_64BIT_TIME && > > - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) > > + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) > > return do_set_sock_timeout(sock, level, optname, optval, optlen); > > > > return sock_setsockopt(sock, level, optname, optval, optlen); > > @@ -450,7 +450,7 @@ static int compat_sock_getsockopt(struct socket *sock, int level, int optname, > > char __user *optval, int __user *optlen) > > { > > if (!COMPAT_USE_64BIT_TIME && > > - (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) > > + (optname == SO_RCVTIMEO_OLD || optname == SO_SNDTIMEO_OLD)) > > return do_get_sock_timeout(sock, level, optname, optval, optlen); > > return sock_getsockopt(sock, level, optname, optval, optlen); > > } > > I looked at the original code and noticed that it's horrible, which of course > is not your fault, but I wonder if we should just fix it now to avoid that > get_fs()/set_fs() hack, since that code mostly implements what you > also have in your patch 3 (which is done more nicely). I did think of getting rid of set_fs()/ get_fs() here. But, I wasn't sure as the maintainers seemed to prefer to leave to the old code as is in the other series for timestamps. > I'll follow up with a patch to demonstrate what I mean here. Your third > patch will then just have to add another code path so we can handle > all of old_timespec32 (for existing 32-bit user space), __kernel_old_timespec > (for sparc64) and __kernel_sock_timeval (for everything else). Cool, I will rebase on top of your patch. Thanks, Deepa ^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 3/3] sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW 2019-01-08 5:22 [PATCH 0/3] net: y2038-safe socket timeout options Deepa Dinamani 2019-01-08 5:22 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani @ 2019-01-08 5:22 ` Deepa Dinamani 1 sibling, 0 replies; 7+ messages in thread From: Deepa Dinamani @ 2019-01-08 5:22 UTC (permalink / raw) To: davem, linux-kernel Cc: netdev, arnd, y2038, ccaulfie, deller, paulus, ralf, rth, cluster-devel, linuxppc-dev, linux-alpha, linux-arch, linux-mips, linux-parisc, sparclinux Add new socket timeout options that are y2038 safe. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: ccaulfie@redhat.com Cc: davem@davemloft.net Cc: deller@gmx.de Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: rth@twiddle.net Cc: cluster-devel@redhat.com Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: sparclinux@vger.kernel.org --- arch/alpha/include/uapi/asm/socket.h | 12 +++-- arch/mips/include/uapi/asm/socket.h | 11 ++++- arch/parisc/include/uapi/asm/socket.h | 11 ++++- arch/sparc/include/uapi/asm/socket.h | 11 ++++- include/net/sock.h | 4 +- include/uapi/asm-generic/socket.h | 11 ++++- net/core/sock.c | 64 +++++++++++++++++++++------ 7 files changed, 98 insertions(+), 26 deletions(-) diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h index ea3ba981d8a0..3d800d5d3d5d 100644 --- a/arch/alpha/include/uapi/asm/socket.h +++ b/arch/alpha/include/uapi/asm/socket.h @@ -118,19 +118,25 @@ #define SO_TIMESTAMPNS_NEW 63 #define SO_TIMESTAMPING_NEW 64 -#if !defined(__KERNEL__) +#define SO_RCVTIMEO_NEW 65 +#define SO_SNDTIMEO_NEW 66 -#define SO_RCVTIMEO SO_RCVTIMEO_OLD -#define SO_SNDTIMEO SO_SNDTIMEO_OLD +#if !defined(__KERNEL__) #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD #define SO_TIMESTAMPING SO_TIMESTAMPING_OLD + +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #else #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW) #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW) #define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW) + +#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW) +#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW) #endif #define SCM_TIMESTAMP SO_TIMESTAMP diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h index 4dde20d64690..5a7f9010c090 100644 --- a/arch/mips/include/uapi/asm/socket.h +++ b/arch/mips/include/uapi/asm/socket.h @@ -128,18 +128,25 @@ #define SO_TIMESTAMPNS_NEW 63 #define SO_TIMESTAMPING_NEW 64 +#define SO_RCVTIMEO_NEW 65 +#define SO_SNDTIMEO_NEW 66 + #if !defined(__KERNEL__) -#define SO_RCVTIMEO SO_RCVTIMEO_OLD -#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD #define SO_TIMESTAMPING SO_TIMESTAMPING_OLD + +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #else #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW) #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW) #define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW) + +#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW) +#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW) #endif #define SCM_TIMESTAMP SO_TIMESTAMP diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h index 546937fa0d8b..bd35de5b4666 100644 --- a/arch/parisc/include/uapi/asm/socket.h +++ b/arch/parisc/include/uapi/asm/socket.h @@ -109,18 +109,25 @@ #define SO_TIMESTAMPNS_NEW 0x4038 #define SO_TIMESTAMPING_NEW 0x4039 +#define SO_RCVTIMEO_NEW 0x4040 +#define SO_SNDTIMEO_NEW 0x4041 + #if !defined(__KERNEL__) -#define SO_RCVTIMEO SO_RCVTIMEO_OLD -#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD #define SO_TIMESTAMPING SO_TIMESTAMPING_OLD + +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #else #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW) #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW) #define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW) + +#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW) +#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW) #endif #define SCM_TIMESTAMP SO_TIMESTAMP diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h index bdc396211627..5a5b073c3299 100644 --- a/arch/sparc/include/uapi/asm/socket.h +++ b/arch/sparc/include/uapi/asm/socket.h @@ -110,18 +110,25 @@ #define SO_TIMESTAMPNS_NEW 0x0042 #define SO_TIMESTAMPING_NEW 0x0043 +#define SO_RCVTIMEO_NEW 0x0044 +#define SO_SNDTIMEO_NEW 0x0045 + #if !defined(__KERNEL__) -#define SO_RCVTIMEO SO_RCVTIMEO_OLD -#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD #define SO_TIMESTAMPING SO_TIMESTAMPING_OLD + +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #else #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW) #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW) #define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW) + +#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW) +#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW) #endif diff --git a/include/net/sock.h b/include/net/sock.h index 98965a9a2bf4..6679f3c120b0 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -292,8 +292,8 @@ struct sock_common { * @sk_peer_pid: &struct pid for this socket's peer * @sk_peer_cred: %SO_PEERCRED setting * @sk_rcvlowat: %SO_RCVLOWAT setting - * @sk_rcvtimeo: %SO_RCVTIMEO_OLD setting - * @sk_sndtimeo: %SO_SNDTIMEO_OLD setting + * @sk_rcvtimeo: %SO_RCVTIMEO setting + * @sk_sndtimeo: %SO_SNDTIMEO setting * @sk_txhash: computed flow hash for use on transmit * @sk_filter: socket filtering instructions * @sk_timer: sock cleanup timer diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h index 9e370586fb19..5b4da6eacc9f 100644 --- a/include/uapi/asm-generic/socket.h +++ b/include/uapi/asm-generic/socket.h @@ -112,19 +112,26 @@ #define SO_TIMESTAMPNS_NEW 63 #define SO_TIMESTAMPING_NEW 64 +#define SO_RCVTIMEO_NEW 65 +#define SO_SNDTIMEO_NEW 66 + #if !defined(__KERNEL__) -#define SO_RCVTIMEO SO_RCVTIMEO_OLD -#define SO_SNDTIMEO SO_SNDTIMEO_OLD #if __BITS_PER_LONG == 64 || (defined(__x86_64__) && defined(__ILP32__)) /* on 64-bit and x32, avoid the ?: operator */ #define SO_TIMESTAMP SO_TIMESTAMP_OLD #define SO_TIMESTAMPNS SO_TIMESTAMPNS_OLD #define SO_TIMESTAMPING SO_TIMESTAMPING_OLD + +#define SO_RCVTIMEO SO_RCVTIMEO_OLD +#define SO_SNDTIMEO SO_SNDTIMEO_OLD #else #define SO_TIMESTAMP (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMP_OLD : SO_TIMESTAMP_NEW) #define SO_TIMESTAMPNS (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPNS_OLD : SO_TIMESTAMPNS_NEW) #define SO_TIMESTAMPING (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_TIMESTAMPING_OLD : SO_TIMESTAMPING_NEW) + +#define SO_RCVTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_RCVTIMEO_OLD : SO_RCVTIMEO_NEW) +#define SO_SNDTIMEO (sizeof(time_t) == sizeof(__kernel_long_t) ? SO_SNDTIMEO_OLD : SO_SNDTIMEO_NEW) #endif #define SCM_TIMESTAMP SO_TIMESTAMP diff --git a/net/core/sock.c b/net/core/sock.c index 42914ca3186c..5e1c6dafee65 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -335,18 +335,31 @@ int __sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) } EXPORT_SYMBOL(__sk_backlog_rcv); -static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen) +static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen, bool old_timeval) { - struct __kernel_old_timeval tv; - if (optlen < sizeof(tv)) - return -EINVAL; - if (copy_from_user(&tv, optval, sizeof(tv))) - return -EFAULT; - if (tv.tv_usec < 0 || tv.tv_usec >= USEC_PER_SEC) + struct __kernel_sock_timeval stv; + + if (old_timeval) { + struct __kernel_old_timeval tv; + + if (optlen < sizeof(tv)) + return -EINVAL; + if (copy_from_user(&tv, optval, sizeof(tv))) + return -EFAULT; + stv.tv_sec = tv.tv_sec; + stv.tv_usec = tv.tv_usec; + } else { + if (optlen < sizeof(stv)) + return -EINVAL; + if (copy_from_user(&stv, optval, sizeof(stv))) + return -EFAULT; + } + + if (stv.tv_usec < 0 || stv.tv_usec >= USEC_PER_SEC) return -EDOM; - if (tv.tv_sec < 0) { + if (stv.tv_sec < 0) { static int warned __read_mostly; *timeo_p = 0; @@ -358,10 +371,10 @@ static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen) return 0; } *timeo_p = MAX_SCHEDULE_TIMEOUT; - if (tv.tv_sec == 0 && tv.tv_usec == 0) + if (stv.tv_sec == 0 && stv.tv_usec == 0) return 0; - if (tv.tv_sec < (MAX_SCHEDULE_TIMEOUT/HZ - 1)) - *timeo_p = tv.tv_sec * HZ + DIV_ROUND_UP(tv.tv_usec, USEC_PER_SEC / HZ); + if (stv.tv_sec < (MAX_SCHEDULE_TIMEOUT / HZ - 1)) + *timeo_p = stv.tv_sec * HZ + DIV_ROUND_UP((unsigned long)stv.tv_usec, USEC_PER_SEC / HZ); return 0; } @@ -890,11 +903,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname, break; case SO_RCVTIMEO_OLD: - ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen); + case SO_RCVTIMEO_NEW: + ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen, optname == SO_RCVTIMEO_OLD); break; case SO_SNDTIMEO_OLD: - ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen); + case SO_SNDTIMEO_NEW: + ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen, optname == SO_SNDTIMEO_OLD); break; case SO_ATTACH_FILTER: @@ -1114,6 +1129,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, u64 val64; struct linger ling; struct __kernel_old_timeval tm; + struct __kernel_sock_timeval stm; struct sock_txtime txtime; } v; @@ -1233,6 +1249,17 @@ int sock_getsockopt(struct socket *sock, int level, int optname, } break; + case SO_RCVTIMEO_NEW: + lv = sizeof(struct __kernel_sock_timeval); + if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) { + v.stm.tv_sec = 0; + v.stm.tv_usec = 0; + } else { + v.stm.tv_sec = sk->sk_rcvtimeo / HZ; + v.stm.tv_usec = ((sk->sk_rcvtimeo % HZ) * USEC_PER_SEC) / HZ; + } + break; + case SO_SNDTIMEO_OLD: lv = sizeof(struct __kernel_old_timeval); if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) { @@ -1244,6 +1271,17 @@ int sock_getsockopt(struct socket *sock, int level, int optname, } break; + case SO_SNDTIMEO_NEW: + lv = sizeof(struct __kernel_sock_timeval); + if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) { + v.stm.tv_sec = 0; + v.stm.tv_usec = 0; + } else { + v.stm.tv_sec = sk->sk_sndtimeo / HZ; + v.stm.tv_usec = ((sk->sk_sndtimeo % HZ) * USEC_PER_SEC) / HZ; + } + break; + case SO_RCVLOWAT: v.val = sk->sk_rcvlowat; break; -- 2.17.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
end of thread, other threads:[~2019-01-08 21:29 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2019-01-08 5:22 [PATCH 0/3] net: y2038-safe socket timeout options Deepa Dinamani 2019-01-08 5:22 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani 2019-01-08 20:03 ` Arnd Bergmann 2019-01-08 20:09 ` [PATCH] socket: move compat timeout handling into sock.c Arnd Bergmann 2019-01-08 21:29 ` Deepa Dinamani 2019-01-08 21:19 ` [PATCH 2/3] socket: Rename SO_RCVTIMEO/ SO_SNDTIMEO with _OLD suffixes Deepa Dinamani 2019-01-08 5:22 ` [PATCH 3/3] sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW Deepa Dinamani
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