* Re: [RFCv4 PATCH 2/2] net: Allow protocols to provide an unlocked_recvmsg socket method
From: Arnaldo Carvalho de Melo @ 2009-09-17 21:53 UTC (permalink / raw)
To: Nir Tzachar
Cc: David Miller, Linux Networking Development Mailing List,
Caitlin Bestler, Chris Van Hoof, Clark Williams, Neil Horman,
Nivedita Singhvi, Paul Moore, Rémi Denis-Courmont,
Steven Whitehouse, Ziv Ayalon
In-Reply-To: <20090917212113.GC3691@ghostprotocols.net>
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Em Thu, Sep 17, 2009 at 06:21:13PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Thu, Sep 17, 2009 at 05:09:19PM +0300, Nir Tzachar escreveu:
> > Hello.
> >
> > Below are some test results with the patch (only part 1, as I did not
> > manage to apply part 2).
>
> I forgot to mention that the patches were made against DaveM's
> net-next-2.6 tree at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
>
> If you have a linux-2.6 git tree, just do:
>
> cd linux-2.6
> git remote add net-next git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
> git branch -b net-next-recvmmsg net-next/master
>
> And you should be able to apply the two patches cleanly.
Strange, I just checked out v2.6.31 and only one hunk in the _first_
patch (adding the recvmmsg entry in the sparc 32 syscall table) failed,
the second applied with just minor offsets.
You must have corrupted the patch when saving somehow, anyway, find
both, against v2.6.31, attached.
Back to building the kernel on 10 Gbit/s hardware.
- Arnaldo
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>From fbdd4648e212c95d82672f385996df0d01086c00 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 17 Sep 2009 18:44:40 -0300
Subject: [PATCH 1/2] net: Introduce recvmmsg socket syscall
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Meaning receive multiple messages, reducing the number of syscalls and
net stack entry/exit operations.
Next patches will introduce mechanisms where protocols that want to
optimize this operation will provide an unlocked_recvmsg operation.
This takes into account comments made by:
. Paul Moore: sock_recvmsg is called only for the first datagram,
sock_recvmsg_nosec is used for the rest.
. Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
works in the same fashion as the ppoll one.
If the underlying protocol returns a datagram with MSG_OOB set, this
will make recvmmsg return right away with as many datagrams (+ the OOB
one) it has received so far.
. Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
datagrams and then recvmsg returns an error, recvmmsg will return
the successfully received datagrams, store the error and return it
in the next call.
This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
where we will be able to acquire the lock only at batch start and end, not at
every underlying recvmsg call.
Cc: Caitlin Bestler <caitlin.bestler@gmail.com>
Cc: Chris Van Hoof <vanhoof@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Nir Tzachar <nir.tzachar@gmail.com>
Cc: Nivedita Singhvi <niv@us.ibm.com>
Cc: Paul Moore <paul.moore@hp.com>
Cc: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Cc: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
arch/alpha/kernel/systbls.S | 1 +
arch/arm/kernel/calls.S | 1 +
arch/avr32/kernel/syscall_table.S | 1 +
arch/blackfin/mach-common/entry.S | 1 +
arch/ia64/kernel/entry.S | 1 +
arch/microblaze/kernel/syscall_table.S | 1 +
arch/mips/kernel/scall32-o32.S | 1 +
arch/mips/kernel/scall64-64.S | 1 +
arch/mips/kernel/scall64-n32.S | 1 +
arch/mips/kernel/scall64-o32.S | 1 +
arch/sh/kernel/syscalls_64.S | 1 +
arch/sparc/kernel/systbls_64.S | 4 +-
arch/x86/ia32/ia32entry.S | 1 +
arch/x86/include/asm/unistd_32.h | 1 +
arch/x86/include/asm/unistd_64.h | 2 +
arch/x86/kernel/syscall_table_32.S | 1 +
arch/xtensa/include/asm/unistd.h | 4 +-
include/linux/net.h | 1 +
include/linux/socket.h | 10 ++
include/linux/syscalls.h | 4 +
include/net/compat.h | 8 +
kernel/sys_ni.c | 2 +
net/compat.c | 33 +++++-
net/socket.c | 225 ++++++++++++++++++++++++++------
24 files changed, 259 insertions(+), 48 deletions(-)
diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S
index 95c9aef..cda6b8b 100644
--- a/arch/alpha/kernel/systbls.S
+++ b/arch/alpha/kernel/systbls.S
@@ -497,6 +497,7 @@ sys_call_table:
.quad sys_signalfd
.quad sys_ni_syscall
.quad sys_eventfd
+ .quad sys_recvmmsg
.size sys_call_table, . - sys_call_table
.type sys_call_table, @object
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index f776e72..43995f6 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -374,6 +374,7 @@
CALL(sys_pwritev)
CALL(sys_rt_tgsigqueueinfo)
CALL(sys_perf_counter_open)
+ CALL(sys_recvmmsg)
#ifndef syscalls_counted
.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
#define syscalls_counted
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
index 7ee0057..e76bad1 100644
--- a/arch/avr32/kernel/syscall_table.S
+++ b/arch/avr32/kernel/syscall_table.S
@@ -295,4 +295,5 @@ sys_call_table:
.long sys_signalfd
.long sys_ni_syscall /* 280, was sys_timerfd */
.long sys_eventfd
+ .long sys_recvmmsg
.long sys_ni_syscall /* r8 is saturated at nr_syscalls */
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index fb1795d..e4d3d0f 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -1612,6 +1612,7 @@ ENTRY(_sys_call_table)
.long _sys_pwritev
.long _sys_rt_tgsigqueueinfo
.long _sys_perf_counter_open
+ .long _sys_recvmmsg
.rept NR_syscalls-(.-_sys_call_table)/4
.long _sys_ni_syscall
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index d0e7d37..d75b872 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1806,6 +1806,7 @@ sys_call_table:
data8 sys_preadv
data8 sys_pwritev // 1320
data8 sys_rt_tgsigqueueinfo
+ data8 sys_recvmmsg
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
#endif /* __IA64_ASM_PARAVIRTUALIZED_NATIVE */
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 4572160..623dbf1 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -371,3 +371,4 @@ ENTRY(sys_call_table)
.long sys_ni_syscall
.long sys_rt_tgsigqueueinfo /* 365 */
.long sys_perf_counter_open
+ .long sys_recvmmsg
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index b570821..b92aa3e 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -655,6 +655,7 @@ einval: li v0, -ENOSYS
sys sys_rt_tgsigqueueinfo 4
sys sys_perf_counter_open 5
sys sys_accept4 4
+ sys sys_recvmmsg 5
.endm
/* We pre-compute the number of _instruction_ bytes needed to
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 3d866f2..d3384d8 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -492,4 +492,5 @@ sys_call_table:
PTR sys_rt_tgsigqueueinfo
PTR sys_perf_counter_open
PTR sys_accept4
+ PTR sys_recvmmsg
.size sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index e855b11..c332346 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -418,4 +418,5 @@ EXPORT(sysn32_call_table)
PTR compat_sys_rt_tgsigqueueinfo /* 5295 */
PTR sys_perf_counter_open
PTR sys_accept4
+ PTR compat_sys_recvmmsg
.size sysn32_call_table,.-sysn32_call_table
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 0c49f1a..12bc997 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -538,4 +538,5 @@ sys_call_table:
PTR compat_sys_rt_tgsigqueueinfo
PTR sys_perf_counter_open
PTR sys_accept4
+ PTR compat_sys_recvmmsg
.size sys_call_table,.-sys_call_table
diff --git a/arch/sh/kernel/syscalls_64.S b/arch/sh/kernel/syscalls_64.S
index bf420b6..056e0a7 100644
--- a/arch/sh/kernel/syscalls_64.S
+++ b/arch/sh/kernel/syscalls_64.S
@@ -391,3 +391,4 @@ sys_call_table:
.long sys_pwritev
.long sys_rt_tgsigqueueinfo
.long sys_perf_counter_open
+ .long sys_recvmmsg /* 365 */
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 2ee7250..7e77138 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -83,7 +83,7 @@ sys_call_table32:
/*310*/ .word compat_sys_utimensat, compat_sys_signalfd, sys_timerfd_create, sys_eventfd, compat_sys_fallocate
.word compat_sys_timerfd_settime, compat_sys_timerfd_gettime, compat_sys_signalfd4, sys_eventfd2, sys_epoll_create1
/*320*/ .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, compat_sys_preadv
- .word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo
+ .word compat_sys_pwritev, compat_sys_rt_tgsigqueueinfo, compat_sys_recvmmsg
#endif /* CONFIG_COMPAT */
@@ -158,4 +158,4 @@ sys_call_table:
/*310*/ .word sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
.word sys_timerfd_settime, sys_timerfd_gettime, sys_signalfd4, sys_eventfd2, sys_epoll_create1
/*320*/ .word sys_dup3, sys_pipe2, sys_inotify_init1, sys_accept4, sys_preadv
- .word sys_pwritev, sys_rt_tgsigqueueinfo
+ .word sys_pwritev, sys_rt_tgsigqueueinfo, sys_recvmmsg
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index e590261..2a188e5 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -832,4 +832,5 @@ ia32_sys_call_table:
.quad compat_sys_pwritev
.quad compat_sys_rt_tgsigqueueinfo /* 335 */
.quad sys_perf_counter_open
+ .quad compat_sys_recvmmsg
ia32_syscall_end:
diff --git a/arch/x86/include/asm/unistd_32.h b/arch/x86/include/asm/unistd_32.h
index 732a307..3e72cae 100644
--- a/arch/x86/include/asm/unistd_32.h
+++ b/arch/x86/include/asm/unistd_32.h
@@ -342,6 +342,7 @@
#define __NR_pwritev 334
#define __NR_rt_tgsigqueueinfo 335
#define __NR_perf_counter_open 336
+#define __NR_recvmmsg 337
#ifdef __KERNEL__
diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h
index 900e161..713a32a 100644
--- a/arch/x86/include/asm/unistd_64.h
+++ b/arch/x86/include/asm/unistd_64.h
@@ -661,6 +661,8 @@ __SYSCALL(__NR_pwritev, sys_pwritev)
__SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
#define __NR_perf_counter_open 298
__SYSCALL(__NR_perf_counter_open, sys_perf_counter_open)
+#define __NR_recvmmsg 299
+__SYSCALL(__NR_recvmmsg, sys_recvmmsg)
#ifndef __NO_STUBS
#define __ARCH_WANT_OLD_READDIR
diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S
index d51321d..4881b14 100644
--- a/arch/x86/kernel/syscall_table_32.S
+++ b/arch/x86/kernel/syscall_table_32.S
@@ -336,3 +336,4 @@ ENTRY(sys_call_table)
.long sys_pwritev
.long sys_rt_tgsigqueueinfo /* 335 */
.long sys_perf_counter_open
+ .long sys_recvmmsg
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index c092c8f..4e55dc7 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -681,8 +681,10 @@ __SYSCALL(304, sys_signalfd, 3)
__SYSCALL(305, sys_ni_syscall, 0)
#define __NR_eventfd 306
__SYSCALL(306, sys_eventfd, 1)
+#define __NR_recvmmsg 307
+__SYSCALL(307, sys_recvmmsg, 5)
-#define __NR_syscall_count 307
+#define __NR_syscall_count 308
/*
* sysxtensa syscall handler
diff --git a/include/linux/net.h b/include/linux/net.h
index 4fc2ffd..d67587a 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -41,6 +41,7 @@
#define SYS_SENDMSG 16 /* sys_sendmsg(2) */
#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
#define SYS_ACCEPT4 18 /* sys_accept4(2) */
+#define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */
typedef enum {
SS_FREE = 0, /* not allocated */
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 3b461df..c192bf8 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -65,6 +65,12 @@ struct msghdr {
unsigned msg_flags;
};
+/* For recvmmsg/sendmmsg */
+struct mmsghdr {
+ struct msghdr msg_hdr;
+ unsigned msg_len;
+};
+
/*
* POSIX 1003.1g - ancillary data object information
* Ancillary data consits of a sequence of pairs of
@@ -327,6 +333,10 @@ extern int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uadd
extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);
extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
+struct timespec;
+
+extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
+ unsigned int flags, struct timespec *timeout);
#endif
#endif /* not kernel and not glibc */
#endif /* _LINUX_SOCKET_H */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 80de700..a3532ef 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -25,6 +25,7 @@ struct linux_dirent64;
struct list_head;
struct msgbuf;
struct msghdr;
+struct mmsghdr;
struct msqid_ds;
struct new_utsname;
struct nfsctl_arg;
@@ -559,6 +560,9 @@ asmlinkage long sys_recv(int, void __user *, size_t, unsigned);
asmlinkage long sys_recvfrom(int, void __user *, size_t, unsigned,
struct sockaddr __user *, int __user *);
asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags);
+asmlinkage long sys_recvmmsg(int fd, struct mmsghdr __user *msg,
+ unsigned int vlen, unsigned flags,
+ struct timespec __user *timeout);
asmlinkage long sys_socket(int, int, int);
asmlinkage long sys_socketpair(int, int, int, int __user *);
asmlinkage long sys_socketcall(int call, unsigned long __user *args);
diff --git a/include/net/compat.h b/include/net/compat.h
index 5bbf8bf..96c38d8 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -18,6 +18,11 @@ struct compat_msghdr {
compat_uint_t msg_flags;
};
+struct compat_mmsghdr {
+ struct compat_msghdr msg_hdr;
+ compat_uint_t msg_len;
+};
+
struct compat_cmsghdr {
compat_size_t cmsg_len;
compat_int_t cmsg_level;
@@ -35,6 +40,9 @@ extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
+extern asmlinkage long compat_sys_recvmmsg(int, struct compat_mmsghdr __user *,
+ unsigned, unsigned,
+ struct timespec __user *);
extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *);
extern int put_cmsg_compat(struct msghdr*, int, int, int, void *);
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 68320f6..f581fb0 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -48,7 +48,9 @@ cond_syscall(sys_shutdown);
cond_syscall(sys_sendmsg);
cond_syscall(compat_sys_sendmsg);
cond_syscall(sys_recvmsg);
+cond_syscall(sys_recvmmsg);
cond_syscall(compat_sys_recvmsg);
+cond_syscall(compat_sys_recvmmsg);
cond_syscall(sys_socketcall);
cond_syscall(sys_futex);
cond_syscall(compat_sys_futex);
diff --git a/net/compat.c b/net/compat.c
index 8d73905..9a149a6 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -727,10 +727,10 @@ EXPORT_SYMBOL(compat_mc_getsockopt);
/* Argument list sizes for compat_sys_socketcall */
#define AL(x) ((x) * sizeof(u32))
-static unsigned char nas[19]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
+static unsigned char nas[20]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
- AL(4)};
+ AL(4),AL(5)};
#undef AL
asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
@@ -743,13 +743,36 @@ asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, uns
return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}
+asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
+ unsigned vlen, unsigned int flags,
+ struct timespec __user *timeout)
+{
+ int datagrams;
+ struct timespec ktspec;
+ struct compat_timespec __user *utspec =
+ (struct compat_timespec __user *)timeout;
+
+ if (get_user(ktspec.tv_sec, &utspec->tv_sec) ||
+ get_user(ktspec.tv_nsec, &utspec->tv_nsec))
+ return -EFAULT;
+
+ datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
+ flags | MSG_CMSG_COMPAT, &ktspec);
+ if (datagrams > 0 &&
+ (put_user(ktspec.tv_sec, &utspec->tv_sec) ||
+ put_user(ktspec.tv_nsec, &utspec->tv_nsec)))
+ datagrams = -EFAULT;
+
+ return datagrams;
+}
+
asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
{
int ret;
u32 a[6];
u32 a0, a1;
- if (call < SYS_SOCKET || call > SYS_ACCEPT4)
+ if (call < SYS_SOCKET || call > SYS_RECVMMSG)
return -EINVAL;
if (copy_from_user(a, args, nas[call]))
return -EFAULT;
@@ -810,6 +833,10 @@ asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
case SYS_RECVMSG:
ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
break;
+ case SYS_RECVMMSG:
+ ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
+ compat_ptr(a[4]));
+ break;
case SYS_ACCEPT4:
ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
break;
diff --git a/net/socket.c b/net/socket.c
index 6d47165..32db56a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -668,10 +668,9 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
-static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
- struct msghdr *msg, size_t size, int flags)
+static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
{
- int err;
struct sock_iocb *si = kiocb_to_siocb(iocb);
si->sock = sock;
@@ -680,13 +679,17 @@ static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
si->size = size;
si->flags = flags;
- err = security_socket_recvmsg(sock, msg, size, flags);
- if (err)
- return err;
-
return sock->ops->recvmsg(iocb, sock, msg, size, flags);
}
+static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
+{
+ int err = security_socket_recvmsg(sock, msg, size, flags);
+
+ return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
+}
+
int sock_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
@@ -702,6 +705,21 @@ int sock_recvmsg(struct socket *sock, struct msghdr *msg,
return ret;
}
+static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct kiocb iocb;
+ struct sock_iocb siocb;
+ int ret;
+
+ init_sync_kiocb(&iocb, NULL);
+ iocb.private = &siocb;
+ ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
+ if (-EIOCBQUEUED == ret)
+ ret = wait_on_sync_kiocb(&iocb);
+ return ret;
+}
+
int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num, size_t size, int flags)
{
@@ -1965,22 +1983,15 @@ out:
return err;
}
-/*
- * BSD recvmsg interface
- */
-
-SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
- unsigned int, flags)
+static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
+ struct msghdr *msg_sys, unsigned flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
- struct socket *sock;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
- struct msghdr msg_sys;
unsigned long cmsg_ptr;
int err, iov_size, total_len, len;
- int fput_needed;
/* kernel mode address */
struct sockaddr_storage addr;
@@ -1990,27 +2001,23 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
- if (get_compat_msghdr(&msg_sys, msg_compat))
+ if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
}
- else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
+ else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
return -EFAULT;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
- if (!sock)
- goto out;
-
err = -EMSGSIZE;
- if (msg_sys.msg_iovlen > UIO_MAXIOV)
- goto out_put;
+ if (msg_sys->msg_iovlen > UIO_MAXIOV)
+ goto out;
/* Check whether to allocate the iovec area */
err = -ENOMEM;
- iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
- if (msg_sys.msg_iovlen > UIO_FASTIOV) {
+ iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
+ if (msg_sys->msg_iovlen > UIO_FASTIOV) {
iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
if (!iov)
- goto out_put;
+ goto out;
}
/*
@@ -2018,46 +2025,47 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
* kernel msghdr to use the kernel address space)
*/
- uaddr = (__force void __user *)msg_sys.msg_name;
+ 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,
+ err = verify_compat_iovec(msg_sys, iov,
(struct sockaddr *)&addr,
VERIFY_WRITE);
} else
- err = verify_iovec(&msg_sys, iov,
+ err = verify_iovec(msg_sys, iov,
(struct sockaddr *)&addr,
VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
- cmsg_ptr = (unsigned long)msg_sys.msg_control;
- msg_sys.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
+ cmsg_ptr = (unsigned long)msg_sys->msg_control;
+ msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
- err = sock_recvmsg(sock, &msg_sys, total_len, flags);
+ err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
+ total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user((struct sockaddr *)&addr,
- msg_sys.msg_namelen, uaddr,
+ msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
- err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT),
+ err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
- err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr,
+ err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
- err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr,
+ err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
@@ -2066,21 +2074,150 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
out_freeiov:
if (iov != iovstack)
sock_kfree_s(sock->sk, iov, iov_size);
-out_put:
+out:
+ return err;
+}
+
+/*
+ * BSD recvmsg interface
+ */
+
+SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
+ unsigned int, flags)
+{
+ int fput_needed, err;
+ struct msghdr msg_sys;
+ struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
+
+ if (!sock)
+ goto out;
+
+ err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
+
fput_light(sock->file, fput_needed);
out:
return err;
}
-#ifdef __ARCH_WANT_SYS_SOCKETCALL
+/*
+ * Linux recvmmsg interface
+ */
+
+int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
+ unsigned int flags, struct timespec *timeout)
+{
+ int fput_needed, err, datagrams;
+ struct socket *sock;
+ struct mmsghdr __user *entry;
+ struct msghdr msg_sys;
+ struct timespec end_time;
+
+ if (timeout &&
+ poll_select_set_timeout(&end_time, timeout->tv_sec,
+ timeout->tv_nsec))
+ return -EINVAL;
+
+ datagrams = 0;
+
+ sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ if (!sock)
+ return err;
+
+ err = sock_error(sock->sk);
+ if (err)
+ goto out_put;
+
+ entry = mmsg;
+
+ while (datagrams < vlen) {
+ /*
+ * No need to ask LSM for more than the first datagram.
+ */
+ err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
+ &msg_sys, flags, datagrams);
+ if (err < 0)
+ break;
+ err = put_user(err, &entry->msg_len);
+ if (err)
+ break;
+ ++entry;
+ ++datagrams;
+
+ if (timeout) {
+ ktime_get_ts(timeout);
+ *timeout = timespec_sub(end_time, *timeout);
+ if (timeout->tv_sec < 0) {
+ timeout->tv_sec = timeout->tv_nsec = 0;
+ break;
+ }
+
+ /* Timeout, return less than vlen datagrams */
+ if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
+ break;
+ }
+
+ /* Out of band data, return right away */
+ if (msg_sys.msg_flags & MSG_OOB)
+ break;
+ }
+
+out_put:
+ fput_light(sock->file, fput_needed);
+ if (err == 0)
+ return datagrams;
+
+ if (datagrams != 0) {
+ /*
+ * We may return less entries than requested (vlen) if the
+ * sock is non block and there aren't enough datagrams...
+ */
+ if (err != -EAGAIN) {
+ /*
+ * ... or if recvmsg returns an error after we
+ * received some datagrams, where we record the
+ * error to return on the next call or if the
+ * app asks about it using getsockopt(SO_ERROR).
+ */
+ sock->sk->sk_err = -err;
+ }
+
+ return datagrams;
+ }
+
+ return err;
+}
+
+SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
+ unsigned int, vlen, unsigned int, flags,
+ struct timespec __user *, timeout)
+{
+ int datagrams;
+ struct timespec timeout_sys;
+
+ if (!timeout)
+ return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
+
+ if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
+ return -EFAULT;
+
+ datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
+
+ if (datagrams > 0 &&
+ copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
+ datagrams = -EFAULT;
+
+ return datagrams;
+}
+
+#ifdef __ARCH_WANT_SYS_SOCKETCALL
/* Argument list sizes for sys_socketcall */
#define AL(x) ((x) * sizeof(unsigned long))
-static const unsigned char nargs[19]={
+static const unsigned char nargs[20] = {
AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
- AL(4)
+ AL(4),AL(5)
};
#undef AL
@@ -2099,7 +2236,7 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
unsigned long a0, a1;
int err;
- if (call < 1 || call > SYS_ACCEPT4)
+ if (call < 1 || call > SYS_RECVMMSG)
return -EINVAL;
/* copy_from_user should be SMP safe. */
@@ -2173,6 +2310,10 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
case SYS_RECVMSG:
err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
break;
+ case SYS_RECVMMSG:
+ err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
+ (struct timespec __user *)a[4]);
+ break;
case SYS_ACCEPT4:
err = sys_accept4(a0, (struct sockaddr __user *)a1,
(int __user *)a[2], a[3]);
--
1.6.2.5
[-- Attachment #3: 0002-net-Allow-protocols-to-provide-an-unlocked_recvmsg.patch --]
[-- Type: text/plain, Size: 37300 bytes --]
>From ccafdce1eefb3d59793931e746f1f07722fcfbbe Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 17 Sep 2009 18:48:32 -0300
Subject: [PATCH 2/2] net: Allow protocols to provide an unlocked_recvmsg socket method
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
So thar recvmmsg can use it. With this patch recvmmsg actually _requires_ that
socket->ops->unlocked_recvmsg exists, and that socket->sk->sk_prot->unlocked_recvmsg
is non NULL.
We may well switch back to the previous scheme where sys_recvmmsg checks if
the underlying protocol provides an unlocked version and uses it, falling
back to the locked version if there is none.
But first lets see if this works with recvmmsg alone and what kinds of gains we
get with the unlocked_recvmmsg implementation in UDP. Followup patches can
restore that behaviour if we want to use it with, say, DCCP and SCTP without an
specific unlocked version.
This should address the concerns raised by Rémi about the MSG_UNLOCKED problem.
Cc: Caitlin Bestler <caitlin.bestler@gmail.com>
Cc: Chris Van Hoof <vanhoof@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Nir Tzachar <nir.tzachar@gmail.com>
Cc: Nivedita Singhvi <niv@us.ibm.com>
Cc: Paul Moore <paul.moore@hp.com>
Cc: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Cc: Steven Whitehouse <steve@chygwyn.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
drivers/isdn/mISDN/socket.c | 2 +
drivers/net/pppoe.c | 1 +
drivers/net/pppol2tp.c | 1 +
include/linux/net.h | 7 +++
include/net/sock.h | 13 +++++
net/appletalk/ddp.c | 1 +
net/atm/pvc.c | 1 +
net/atm/svc.c | 1 +
net/ax25/af_ax25.c | 1 +
net/bluetooth/bnep/sock.c | 1 +
net/bluetooth/cmtp/sock.c | 1 +
net/bluetooth/hci_sock.c | 1 +
net/bluetooth/hidp/sock.c | 1 +
net/bluetooth/l2cap.c | 1 +
net/bluetooth/rfcomm/sock.c | 1 +
net/bluetooth/sco.c | 1 +
net/can/bcm.c | 1 +
net/can/raw.c | 1 +
net/core/sock.c | 26 +++++++++
net/dccp/ipv4.c | 1 +
net/dccp/ipv6.c | 1 +
net/decnet/af_decnet.c | 1 +
net/econet/af_econet.c | 1 +
net/ieee802154/af_ieee802154.c | 2 +
net/ipv4/af_inet.c | 3 +
net/ipv4/udp.c | 52 +++++++++++++++---
net/ipv6/af_inet6.c | 2 +
net/ipv6/raw.c | 1 +
net/ipx/af_ipx.c | 1 +
net/irda/af_irda.c | 4 ++
net/iucv/af_iucv.c | 1 +
net/key/af_key.c | 1 +
net/llc/af_llc.c | 1 +
net/netlink/af_netlink.c | 1 +
net/netrom/af_netrom.c | 1 +
net/packet/af_packet.c | 2 +
net/phonet/socket.c | 2 +
net/rds/af_rds.c | 1 +
net/rose/af_rose.c | 1 +
net/rxrpc/af_rxrpc.c | 1 +
net/sctp/ipv6.c | 1 +
net/sctp/protocol.c | 1 +
net/socket.c | 112 +++++++++++++++++++++++++++++++++++----
net/tipc/socket.c | 3 +
net/unix/af_unix.c | 3 +
net/x25/af_x25.c | 1 +
46 files changed, 244 insertions(+), 21 deletions(-)
diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index c36f521..6da3a71 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -590,6 +590,7 @@ static const struct proto_ops data_sock_ops = {
.getname = data_sock_getname,
.sendmsg = mISDN_sock_sendmsg,
.recvmsg = mISDN_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = datagram_poll,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
@@ -743,6 +744,7 @@ static const struct proto_ops base_sock_ops = {
.getname = sock_no_getname,
.sendmsg = sock_no_sendmsg,
.recvmsg = sock_no_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = sock_no_poll,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c
index 5f20902..bf30741 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -1121,6 +1121,7 @@ static const struct proto_ops pppoe_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = pppoe_sendmsg,
.recvmsg = pppoe_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.ioctl = pppox_ioctl,
};
diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c
index e0f9219..af6160c 100644
--- a/drivers/net/pppol2tp.c
+++ b/drivers/net/pppol2tp.c
@@ -2590,6 +2590,7 @@ static struct proto_ops pppol2tp_ops = {
.getsockopt = pppol2tp_getsockopt,
.sendmsg = pppol2tp_sendmsg,
.recvmsg = pppol2tp_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.ioctl = pppox_ioctl,
};
diff --git a/include/linux/net.h b/include/linux/net.h
index d67587a..8b852de 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -186,6 +186,10 @@ struct proto_ops {
int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t total_len,
int flags);
+ int (*unlocked_recvmsg)(struct kiocb *iocb,
+ struct socket *sock,
+ struct msghdr *m,
+ size_t total_len, int flags);
int (*mmap) (struct file *file, struct socket *sock,
struct vm_area_struct * vma);
ssize_t (*sendpage) (struct socket *sock, struct page *page,
@@ -316,6 +320,8 @@ SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct ms
(iocb, sock, m, len)) \
SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
(iocb, sock, m, len, flags)) \
+SOCKCALL_WRAP(name, unlocked_recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
+ (iocb, sock, m, len, flags)) \
SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
(file, sock, vma)) \
\
@@ -337,6 +343,7 @@ static const struct proto_ops name##_ops = { \
.getsockopt = __lock_##name##_getsockopt, \
.sendmsg = __lock_##name##_sendmsg, \
.recvmsg = __lock_##name##_recvmsg, \
+ .unlocked_recvmsg = __lock_##name##_unlocked_recvmsg, \
.mmap = __lock_##name##_mmap, \
};
diff --git a/include/net/sock.h b/include/net/sock.h
index 950409d..7c62428 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -644,6 +644,11 @@ struct proto {
struct msghdr *msg,
size_t len, int noblock, int flags,
int *addr_len);
+ int (*unlocked_recvmsg)(struct kiocb *iocb,
+ struct sock *sk,
+ struct msghdr *msg,
+ size_t len, int noblock,
+ int flags, int *addr_len);
int (*sendpage)(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
int (*bind)(struct sock *sk,
@@ -998,6 +1003,11 @@ extern int sock_no_sendmsg(struct kiocb *, struct socket *,
struct msghdr *, size_t);
extern int sock_no_recvmsg(struct kiocb *, struct socket *,
struct msghdr *, size_t, int);
+extern int sock_no_unlocked_recvmsg(struct kiocb *iocb,
+ struct socket *sock,
+ struct msghdr *msg,
+ size_t size,
+ int flags);
extern int sock_no_mmap(struct file *file,
struct socket *sock,
struct vm_area_struct *vma);
@@ -1014,6 +1024,9 @@ extern int sock_common_getsockopt(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen);
extern int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags);
+extern int sock_common_unlocked_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size,
+ int flags);
extern int sock_common_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen);
extern int compat_sock_common_getsockopt(struct socket *sock, int level,
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 875eda5..100c5d7 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1842,6 +1842,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(atalk_dgram_ops) = {
.getsockopt = sock_no_getsockopt,
.sendmsg = atalk_sendmsg,
.recvmsg = atalk_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
index e1d22d9..5c03749 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -122,6 +122,7 @@ static const struct proto_ops pvc_proto_ops = {
.getsockopt = pvc_getsockopt,
.sendmsg = vcc_sendmsg,
.recvmsg = vcc_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/atm/svc.c b/net/atm/svc.c
index 7b831b5..6c66ae9 100644
--- a/net/atm/svc.c
+++ b/net/atm/svc.c
@@ -644,6 +644,7 @@ static const struct proto_ops svc_proto_ops = {
.setsockopt = svc_setsockopt,
.getsockopt = svc_getsockopt,
.sendmsg = vcc_sendmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.recvmsg = vcc_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index da0f64f..43f4f57 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1976,6 +1976,7 @@ static const struct proto_ops ax25_proto_ops = {
.getsockopt = ax25_getsockopt,
.sendmsg = ax25_sendmsg,
.recvmsg = ax25_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index e857628..0b26b3c 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -178,6 +178,7 @@ static const struct proto_ops bnep_sock_ops = {
.getname = sock_no_getname,
.sendmsg = sock_no_sendmsg,
.recvmsg = sock_no_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = sock_no_poll,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
index 16b0fad..72a4b5d 100644
--- a/net/bluetooth/cmtp/sock.c
+++ b/net/bluetooth/cmtp/sock.c
@@ -173,6 +173,7 @@ static const struct proto_ops cmtp_sock_ops = {
.getname = sock_no_getname,
.sendmsg = sock_no_sendmsg,
.recvmsg = sock_no_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = sock_no_poll,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 4f9621f..bd0aace 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -603,6 +603,7 @@ static const struct proto_ops hci_sock_ops = {
.getname = hci_sock_getname,
.sendmsg = hci_sock_sendmsg,
.recvmsg = hci_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.ioctl = hci_sock_ioctl,
.poll = datagram_poll,
.listen = sock_no_listen,
diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c
index 37c9d7d..90b40e2 100644
--- a/net/bluetooth/hidp/sock.c
+++ b/net/bluetooth/hidp/sock.c
@@ -224,6 +224,7 @@ static const struct proto_ops hidp_sock_ops = {
.getname = sock_no_getname,
.sendmsg = sock_no_sendmsg,
.recvmsg = sock_no_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = sock_no_poll,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index bd0a4c1..945df03 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -2743,6 +2743,7 @@ static const struct proto_ops l2cap_sock_ops = {
.getname = l2cap_sock_getname,
.sendmsg = l2cap_sock_sendmsg,
.recvmsg = l2cap_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = bt_sock_poll,
.ioctl = bt_sock_ioctl,
.mmap = sock_no_mmap,
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 0b85e81..00b1a41 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -1092,6 +1092,7 @@ static const struct proto_ops rfcomm_sock_ops = {
.getname = rfcomm_sock_getname,
.sendmsg = rfcomm_sock_sendmsg,
.recvmsg = rfcomm_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.shutdown = rfcomm_sock_shutdown,
.setsockopt = rfcomm_sock_setsockopt,
.getsockopt = rfcomm_sock_getsockopt,
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 51ae0c3..5ef7b5c 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -965,6 +965,7 @@ static const struct proto_ops sco_sock_ops = {
.getname = sco_sock_getname,
.sendmsg = sco_sock_sendmsg,
.recvmsg = bt_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = bt_sock_poll,
.ioctl = bt_sock_ioctl,
.mmap = sock_no_mmap,
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 72720c7..6e388b3 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1575,6 +1575,7 @@ static struct proto_ops bcm_ops __read_mostly = {
.getsockopt = sock_no_getsockopt,
.sendmsg = bcm_sendmsg,
.recvmsg = bcm_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/can/raw.c b/net/can/raw.c
index db3152d..b8fa610 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -730,6 +730,7 @@ static struct proto_ops raw_ops __read_mostly = {
.getsockopt = raw_getsockopt,
.sendmsg = raw_sendmsg,
.recvmsg = raw_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/core/sock.c b/net/core/sock.c
index 7633422..76a6279 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1643,6 +1643,13 @@ int sock_no_connect(struct socket *sock, struct sockaddr *saddr,
}
EXPORT_SYMBOL(sock_no_connect);
+int sock_no_unlocked_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
+{
+ return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(sock_no_unlocked_recvmsg);
+
int sock_no_socketpair(struct socket *sock1, struct socket *sock2)
{
return -EOPNOTSUPP;
@@ -2004,6 +2011,25 @@ int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
}
EXPORT_SYMBOL(sock_common_recvmsg);
+int sock_common_unlocked_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
+{
+ struct sock *sk = sock->sk;
+ int addr_len = 0;
+ int err;
+
+ if (sk->sk_prot->unlocked_recvmsg == NULL)
+ return -EOPNOTSUPP;
+
+ err = sk->sk_prot->unlocked_recvmsg(iocb, sk, msg, size,
+ flags & MSG_DONTWAIT,
+ flags & ~MSG_DONTWAIT, &addr_len);
+ if (err >= 0)
+ msg->msg_namelen = addr_len;
+ return err;
+}
+EXPORT_SYMBOL(sock_common_unlocked_recvmsg);
+
/*
* Set socket options on an inet socket.
*/
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index a0a36c9..263c9b8 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -974,6 +974,7 @@ static const struct proto_ops inet_dccp_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 3e70faa..ae1f650 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1175,6 +1175,7 @@ static struct proto_ops inet6_dccp_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 77d4028..aa1af0b 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -2348,6 +2348,7 @@ static const struct proto_ops dn_proto_ops = {
.getsockopt = dn_getsockopt,
.sendmsg = dn_sendmsg,
.recvmsg = dn_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index f0bbc57..857ff5b 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -765,6 +765,7 @@ static const struct proto_ops econet_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = econet_sendmsg,
.recvmsg = econet_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/ieee802154/af_ieee802154.c b/net/ieee802154/af_ieee802154.c
index af66180..1602409 100644
--- a/net/ieee802154/af_ieee802154.c
+++ b/net/ieee802154/af_ieee802154.c
@@ -197,6 +197,7 @@ static const struct proto_ops ieee802154_raw_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = ieee802154_sock_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
@@ -222,6 +223,7 @@ static const struct proto_ops ieee802154_dgram_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = ieee802154_sock_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 566ea6c..e8a44d4 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -854,6 +854,7 @@ const struct proto_ops inet_stream_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = tcp_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = tcp_sendpage,
.splice_read = tcp_splice_read,
@@ -880,6 +881,7 @@ const struct proto_ops inet_dgram_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_common_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = inet_sendpage,
#ifdef CONFIG_COMPAT
@@ -909,6 +911,7 @@ static const struct proto_ops inet_sockraw_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = inet_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 80e3812..4033ae5 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -872,13 +872,34 @@ int udp_ioctl(struct sock *sk, int cmd, unsigned long arg)
return 0;
}
+static void skb_free_datagram_locked(struct sock *sk, struct sk_buff *skb)
+{
+ lock_sock(sk);
+ skb_free_datagram(sk, skb);
+ release_sock(sk);
+}
+
+static int skb_kill_datagram_locked(struct sock *sk, struct sk_buff *skb,
+ unsigned int flags)
+{
+ int ret;
+ lock_sock(sk);
+ ret = skb_kill_datagram(sk, skb, flags);
+ release_sock(sk);
+ return ret;
+}
+
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
*/
-
-int udp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
- size_t len, int noblock, int flags, int *addr_len)
+static int __udp_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int noblock,
+ int flags, int *addr_len,
+ void (*free_datagram)(struct sock *,
+ struct sk_buff *),
+ int (*kill_datagram)(struct sock *,
+ struct sk_buff *, unsigned int))
{
struct inet_sock *inet = inet_sk(sk);
struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
@@ -956,23 +977,35 @@ try_again:
err = ulen;
out_free:
- lock_sock(sk);
- skb_free_datagram(sk, skb);
- release_sock(sk);
+ free_datagram(sk, skb);
out:
return err;
csum_copy_err:
- lock_sock(sk);
- if (!skb_kill_datagram(sk, skb, flags))
+ if (!kill_datagram(sk, skb, flags))
UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
- release_sock(sk);
if (noblock)
return -EAGAIN;
goto try_again;
}
+int udp_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int noblock,
+ int flags, int *addr_len)
+{
+ return __udp_recvmsg(iocb, sk, msg, len, noblock, flags, addr_len,
+ skb_free_datagram_locked,
+ skb_kill_datagram_locked);
+}
+
+int udp_unlocked_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int noblock,
+ int flags, int *addr_len)
+{
+ return __udp_recvmsg(iocb, sk, msg, len, noblock, flags, addr_len,
+ skb_free_datagram, skb_kill_datagram);
+}
int udp_disconnect(struct sock *sk, int flags)
{
@@ -1565,6 +1598,7 @@ struct proto udp_prot = {
.getsockopt = udp_getsockopt,
.sendmsg = udp_sendmsg,
.recvmsg = udp_recvmsg,
+ .unlocked_recvmsg = udp_unlocked_recvmsg,
.sendpage = udp_sendpage,
.backlog_rcv = __udp_queue_rcv_skb,
.hash = udp_lib_hash,
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 45f9a2a..7d0cc2f 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -518,6 +518,7 @@ const struct proto_ops inet6_stream_ops = {
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = tcp_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = tcp_sendpage,
.splice_read = tcp_splice_read,
@@ -544,6 +545,7 @@ const struct proto_ops inet6_dgram_ops = {
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
+ .unlocked_recvmsg = sock_common_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index d6c3c1c..c05ec59 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1326,6 +1326,7 @@ static const struct proto_ops inet6_sockraw_ops = {
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index f1118d9..45048a0 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1953,6 +1953,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
.getsockopt = ipx_getsockopt,
.sendmsg = ipx_sendmsg,
.recvmsg = ipx_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 50b43c5..7e97581 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -2489,6 +2489,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
.getsockopt = irda_getsockopt,
.sendmsg = irda_sendmsg,
.recvmsg = irda_recvmsg_stream,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -2513,6 +2514,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
.getsockopt = irda_getsockopt,
.sendmsg = irda_sendmsg,
.recvmsg = irda_recvmsg_dgram,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -2537,6 +2539,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
.getsockopt = irda_getsockopt,
.sendmsg = irda_sendmsg_dgram,
.recvmsg = irda_recvmsg_dgram,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -2562,6 +2565,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
.getsockopt = irda_getsockopt,
.sendmsg = irda_sendmsg_ultra,
.recvmsg = irda_recvmsg_dgram,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 49c15b4..c208622 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1693,6 +1693,7 @@ static struct proto_ops iucv_sock_ops = {
.getname = iucv_sock_getname,
.sendmsg = iucv_sock_sendmsg,
.recvmsg = iucv_sock_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.poll = iucv_sock_poll,
.ioctl = sock_no_ioctl,
.mmap = sock_no_mmap,
diff --git a/net/key/af_key.c b/net/key/af_key.c
index dba9abd..f1af697 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -3636,6 +3636,7 @@ static const struct proto_ops pfkey_ops = {
.getsockopt = sock_no_getsockopt,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
/* Now the operations that really occur. */
.release = pfkey_release,
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index c45eee1..d948caf 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -1115,6 +1115,7 @@ static const struct proto_ops llc_ui_ops = {
.getsockopt = llc_ui_getsockopt,
.sendmsg = llc_ui_sendmsg,
.recvmsg = llc_ui_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 2936fa3..e7a51bb 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1978,6 +1978,7 @@ static const struct proto_ops netlink_ops = {
.getsockopt = netlink_getsockopt,
.sendmsg = netlink_sendmsg,
.recvmsg = netlink_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index ce1a34b..3550d34 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1395,6 +1395,7 @@ static const struct proto_ops nr_proto_ops = {
.getsockopt = nr_getsockopt,
.sendmsg = nr_sendmsg,
.recvmsg = nr_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index ebe5718..dc5d7ff 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2340,6 +2340,7 @@ static const struct proto_ops packet_ops_spkt = {
.getsockopt = sock_no_getsockopt,
.sendmsg = packet_sendmsg_spkt,
.recvmsg = packet_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -2361,6 +2362,7 @@ static const struct proto_ops packet_ops = {
.getsockopt = packet_getsockopt,
.sendmsg = packet_sendmsg,
.recvmsg = packet_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = packet_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index ada2a35..2bd24a5 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -327,6 +327,7 @@ const struct proto_ops phonet_dgram_ops = {
#endif
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -352,6 +353,7 @@ const struct proto_ops phonet_stream_ops = {
#endif
.sendmsg = pn_socket_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index b11e7e5..3e8c846 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -377,6 +377,7 @@ static struct proto_ops rds_proto_ops = {
.getsockopt = rds_getsockopt,
.sendmsg = rds_sendmsg,
.recvmsg = rds_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index e5f478c..a64c623 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1532,6 +1532,7 @@ static struct proto_ops rose_proto_ops = {
.getsockopt = rose_getsockopt,
.sendmsg = rose_sendmsg,
.recvmsg = rose_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index bfe493e..bf4c38a 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -766,6 +766,7 @@ static const struct proto_ops rxrpc_rpc_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = rxrpc_sendmsg,
.recvmsg = rxrpc_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 6a4b190..b68d9f9 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -918,6 +918,7 @@ static const struct proto_ops inet6_seqpacket_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index a76da65..78f52a3 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -897,6 +897,7 @@ static const struct proto_ops inet_seqpacket_ops = {
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
.recvmsg = sock_common_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
diff --git a/net/socket.c b/net/socket.c
index 32db56a..dc5b976 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -690,6 +690,32 @@ static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
}
+static inline int __sock_unlocked_recvmsg_nosec(struct kiocb *iocb,
+ struct socket *sock,
+ struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct sock_iocb *si = kiocb_to_siocb(iocb);
+
+ si->sock = sock;
+ si->scm = NULL;
+ si->msg = msg;
+ si->size = size;
+ si->flags = flags;
+
+ return sock->ops->unlocked_recvmsg(iocb, sock, msg, size, flags);
+}
+
+static inline int __sock_unlocked_recvmsg(struct kiocb *iocb,
+ struct socket *sock,
+ struct msghdr *msg, size_t size,
+ int flags)
+{
+ int err = security_socket_recvmsg(sock, msg, size, flags);
+
+ return err ?: __sock_unlocked_recvmsg_nosec(iocb, sock, msg, size, flags);
+}
+
int sock_recvmsg(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
{
@@ -720,6 +746,58 @@ static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
return ret;
}
+static int sock_unlocked_recvmsg(struct socket *sock, struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct kiocb iocb;
+ struct sock_iocb siocb;
+ int ret;
+
+ init_sync_kiocb(&iocb, NULL);
+ iocb.private = &siocb;
+ ret = __sock_unlocked_recvmsg(&iocb, sock, msg, size, flags);
+ if (-EIOCBQUEUED == ret)
+ ret = wait_on_sync_kiocb(&iocb);
+ return ret;
+}
+
+static int sock_unlocked_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct kiocb iocb;
+ struct sock_iocb siocb;
+ int ret;
+
+ init_sync_kiocb(&iocb, NULL);
+ iocb.private = &siocb;
+ ret = __sock_unlocked_recvmsg_nosec(&iocb, sock, msg, size, flags);
+ if (-EIOCBQUEUED == ret)
+ ret = wait_on_sync_kiocb(&iocb);
+ return ret;
+}
+
+enum sock_recvmsg_security {
+ SOCK_RECVMSG_SEC = 0,
+ SOCK_RECVMSG_NOSEC,
+};
+
+enum sock_recvmsg_locking {
+ SOCK_LOCKED_RECVMSG = 0,
+ SOCK_UNLOCKED_RECVMSG,
+};
+
+static int (*sock_recvmsg_table[2][2])(struct socket *sock, struct msghdr *msg,
+ size_t size, int flags) = {
+ [SOCK_RECVMSG_SEC] = {
+ [SOCK_LOCKED_RECVMSG] = sock_recvmsg, /* The old one */
+ [SOCK_UNLOCKED_RECVMSG] = sock_unlocked_recvmsg,
+ },
+ [SOCK_RECVMSG_NOSEC] = {
+ [SOCK_LOCKED_RECVMSG] = sock_recvmsg_nosec,
+ [SOCK_UNLOCKED_RECVMSG] = sock_unlocked_recvmsg_nosec,
+ },
+};
+
int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num, size_t size, int flags)
{
@@ -1984,7 +2062,9 @@ out:
}
static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
- struct msghdr *msg_sys, unsigned flags, int nosec)
+ struct msghdr *msg_sys, unsigned flags,
+ enum sock_recvmsg_security security,
+ enum sock_recvmsg_locking locking)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
@@ -2044,8 +2124,8 @@ static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
- err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
- total_len, flags);
+ err = sock_recvmsg_table[security][locking](sock, msg_sys,
+ total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
@@ -2092,7 +2172,8 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
if (!sock)
goto out;
- err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
+ err = __sys_recvmsg(sock, msg, &msg_sys, flags,
+ SOCK_RECVMSG_SEC, SOCK_LOCKED_RECVMSG);
fput_light(sock->file, fput_needed);
out:
@@ -2111,6 +2192,7 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
struct mmsghdr __user *entry;
struct msghdr msg_sys;
struct timespec end_time;
+ enum sock_recvmsg_security security;
if (timeout &&
poll_select_set_timeout(&end_time, timeout->tv_sec,
@@ -2123,20 +2205,25 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
if (!sock)
return err;
+ lock_sock(sock->sk);
+
err = sock_error(sock->sk);
if (err)
goto out_put;
entry = mmsg;
+ security = SOCK_RECVMSG_SEC;
while (datagrams < vlen) {
- /*
- * No need to ask LSM for more than the first datagram.
- */
err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
- &msg_sys, flags, datagrams);
+ &msg_sys, flags, security,
+ SOCK_UNLOCKED_RECVMSG);
if (err < 0)
break;
+ /*
+ * No need to ask LSM for more than the first datagram.
+ */
+ security = SOCK_RECVMSG_NOSEC;
err = put_user(err, &entry->msg_len);
if (err)
break;
@@ -2165,9 +2252,8 @@ out_put:
fput_light(sock->file, fput_needed);
if (err == 0)
- return datagrams;
-
- if (datagrams != 0) {
+ err = datagrams;
+ else if (datagrams != 0) {
/*
* We may return less entries than requested (vlen) if the
* sock is non block and there aren't enough datagrams...
@@ -2182,9 +2268,11 @@ out_put:
sock->sk->sk_err = -err;
}
- return datagrams;
+ err = datagrams;
}
+ release_sock(sock->sk);
+
return err;
}
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1848693..141539b 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1791,6 +1791,7 @@ static const struct proto_ops msg_ops = {
.getsockopt = getsockopt,
.sendmsg = send_msg,
.recvmsg = recv_msg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage
};
@@ -1812,6 +1813,7 @@ static const struct proto_ops packet_ops = {
.getsockopt = getsockopt,
.sendmsg = send_packet,
.recvmsg = recv_msg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage
};
@@ -1833,6 +1835,7 @@ static const struct proto_ops stream_ops = {
.getsockopt = getsockopt,
.sendmsg = send_stream,
.recvmsg = recv_stream,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage
};
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index fc3ebb9..7e726a6 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -521,6 +521,7 @@ static const struct proto_ops unix_stream_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_stream_sendmsg,
.recvmsg = unix_stream_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -542,6 +543,7 @@ static const struct proto_ops unix_dgram_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_dgram_sendmsg,
.recvmsg = unix_dgram_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
@@ -563,6 +565,7 @@ static const struct proto_ops unix_seqpacket_ops = {
.getsockopt = sock_no_getsockopt,
.sendmsg = unix_seqpacket_sendmsg,
.recvmsg = unix_dgram_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 5e6c072..7c20b26 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1620,6 +1620,7 @@ static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
.getsockopt = x25_getsockopt,
.sendmsg = x25_sendmsg,
.recvmsg = x25_recvmsg,
+ .unlocked_recvmsg = sock_no_unlocked_recvmsg,
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
};
--
1.6.2.5
^ permalink raw reply related
* Re: Netlink API for bonding ?
From: Nicolas de Pesloüan @ 2009-09-17 22:10 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: Jay Vosburgh, bonding-devel, netdev, Jiri Pirko
In-Reply-To: <20090917145120.5a3bb04b@nehalam>
Stephen Hemminger wrote:
> On Thu, 17 Sep 2009 23:44:30 +0200
> Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:
>
>> Stephen Hemminger wrote:
>>> On Mon, 31 Aug 2009 22:34:50 +0200
>>> Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:
>>>
>>>> Stephen,
>>>>
>>>> Can you please describe the netlink API you plan to implement for bonding ?
>>>>
>>>> Both Jiri Pirko and I plan to add some advanced active slave selection rules,
>>>> for more-than-two-slaves bonding configuration.
>>>>
>>>> Jay suggested that such advanced features be implemented in user space, using
>>>> netlink to notify a daemon when slaves come up or fall down. I agree with Jay,
>>>> but don't want to design something without having first a view at your proposed
>>>> API for bonding.
>>>>
>>>> Do you plan to have some notification to user space, or only the ability to read
>>>> and set bonding configuration using netlink ?
>>>>
>>>> Thanks,
>>>>
>>>> Nicolas.
>>> No paper spec, but was looking to add interface similar to vlan and macvlan.
>>> Just use (and extend if needed) existing rtnl_link_ops.
>>>
>>>
>>> Was not planning on adding a notification interface, thats good idea but
>>> really not what I was looking at.
>> What kind of notification system would you suggest to notify userland that a
>> given bond device just lose the current active slave ?
>
> First why should user land care? Unless all slaves are gone maybe it
> should just be transparent.
Because we try to design a notification from kernel to userland when current
active slave fail, to give an opportunity to userland to decide which non-failed
slave should become the new active one. This is in order to try and move complex
decisions to userland, only keeping very simple "two slaves" decisions into the
kernel.
Think of it as the bonding counter part of moving STP to userland for bridge.
Userland should be able to decide which slave should be the active one for the
same reasons userland is able to decide which bridge port should be forwarding
and which should be blocked.
I assume that we cannot just try to make the current bridge userland
notification system more generic. May be I'm wrong. May be the ability to notify
port failure, port coming back and BPDU for bridge is a superset of what we need
to notify port failure and port coming back for bonding.
> Use existing link ops mechanism (see vlan and macvlan). You may need
> to add new operations, but these should be generic enough so that bonding and bridging
> have same operations.
>
> .newlink => create bond device
> .dellink => remove bond device
> .newport => add slave
> .delport => remove slave
>
> Also, dellink should always work (even if slaves are present).
This sounds perfect for setup, but might not be good the elect the "best" port
(active slave). Also, I assume a new RTNETLINK operation needs to be added for
that. I thought that this was what you were working on. Do I miss something ?
Does brctl use RTNETLINK for port setup ? Or do you plan to use iproute2 to
replace brctl in the futur ?
> The terminology slave is not widely used outside of bonding, and so probably
> shouldn't be buried in the API.
Yes, you are definitely right with this point.
Nicolas.
^ permalink raw reply
* Re: [ANNOUNCE] new iptables module match large amount of ip addresses
From: Jan Engelhardt @ 2009-09-17 22:50 UTC (permalink / raw)
To: Mikulas Patocka; +Cc: netfilter-devel, netdev
In-Reply-To: <Pine.LNX.4.64.0909172100220.27299@artax.karlin.mff.cuni.cz>
On Thursday 2009-09-17 21:15, Mikulas Patocka wrote:
>
>Here I submit an iptables module that can match large amounts (millions)
>of ip addresses efficiently using binary search.
So you just reinvented xt_geoip...
>- fast matching of large amount of ip addresses using binary search.
>- an ability to match ranges of addresses or address/mask subnets.
>- fast loading of the addresses (on Pentium 3 850, 2 million addresses
>load in 5.5s, if they are already sorted in the file, the load time is
>just 1.5s).
>- memory efficient --- consumes only 8 bytes per address.
xt_geoip uses less than that -- 8 bytes per range. Of course it depends
on the data, but on the average, since large netblocks is used, it's
much better than 8 per address.
^ permalink raw reply
* Re: [ANNOUNCE] new iptables module match large amount of ip addresses
From: Mikulas Patocka @ 2009-09-17 23:01 UTC (permalink / raw)
To: Jan Engelhardt; +Cc: netfilter-devel, netdev
In-Reply-To: <alpine.LSU.2.00.0909180046410.20781@obet.zrqbmnf.qr>
On Fri, 18 Sep 2009, Jan Engelhardt wrote:
> On Thursday 2009-09-17 21:15, Mikulas Patocka wrote:
> >
> >Here I submit an iptables module that can match large amounts (millions)
> >of ip addresses efficiently using binary search.
>
> So you just reinvented xt_geoip...
I am wondering, if there are two approaches for matching large amounts of
addresses (xt_geoip and ipset), why is none of them in the kernel?
I was saying how OpenBSD is better than Linux because OpenBSD has
tree-based firewall tables --- hmm --- well --- Linux has them too, except
that noone can really find them because they are not in the kernel.
> >- fast matching of large amount of ip addresses using binary search.
> >- an ability to match ranges of addresses or address/mask subnets.
> >- fast loading of the addresses (on Pentium 3 850, 2 million addresses
> >load in 5.5s, if they are already sorted in the file, the load time is
> >just 1.5s).
> >- memory efficient --- consumes only 8 bytes per address.
>
> xt_geoip uses less than that -- 8 bytes per range. Of course it depends
> on the data, but on the average, since large netblocks is used, it's
> much better than 8 per address.
My code uses 8 bytes per range too, not really per address.
Mikulas
^ permalink raw reply
* Re: [ANNOUNCE] new iptables module match large amount of ip addresses
From: Jan Engelhardt @ 2009-09-17 23:33 UTC (permalink / raw)
To: Mikulas Patocka; +Cc: netfilter-devel, netdev
In-Reply-To: <Pine.LNX.4.64.0909180054410.21427@artax.karlin.mff.cuni.cz>
On Friday 2009-09-18 01:01, Mikulas Patocka wrote:
>> On Thursday 2009-09-17 21:15, Mikulas Patocka wrote:
>> >
>> >Here I submit an iptables module that can match large amounts (millions)
>> >of ip addresses efficiently using binary search.
>>
>> So you just reinvented xt_geoip...
>
>I am wondering, if there are two approaches for matching large amounts of
>addresses (xt_geoip and ipset), why is none of them in the kernel?
Because, so I would estimate, Patrick would decline patches with the
reasoning of redundant code. Especially so "IPMARK".
>I was saying how OpenBSD is better than Linux because OpenBSD has
>tree-based firewall tables --- hmm --- well --- Linux has them too, except
>that noone can really find them because they are not in the kernel.
You can build trees of chains with iptables. (Which would be quite a
fast thing if you do not have modules at hand.)
^ permalink raw reply
* Re: [ANNOUNCE] new iptables module match large amount of ip addresses
From: Mikulas Patocka @ 2009-09-17 23:46 UTC (permalink / raw)
To: Jan Engelhardt; +Cc: netfilter-devel, netdev
In-Reply-To: <alpine.LSU.2.00.0909180130110.20781@obet.zrqbmnf.qr>
> >I was saying how OpenBSD is better than Linux because OpenBSD has
> >tree-based firewall tables --- hmm --- well --- Linux has them too, except
> >that noone can really find them because they are not in the kernel.
>
> You can build trees of chains with iptables. (Which would be quite a
> fast thing if you do not have modules at hand.)
I thought about this too but I realized that building the tree in kernel
would be easier to write than building it with a shell script :)
Mikulas
^ permalink raw reply
* Re: [PATCH] ks8851_ml ethernet network driver
From: David Miller @ 2009-09-17 23:49 UTC (permalink / raw)
To: David.Choi; +Cc: greg, netdev, Charles.Li, Choi, jgarzik, shemminger
In-Reply-To: <C43529A246480145B0A6D0234BDB0F0DE8A1@MELANITE.micrel.com>
From: "Choi, David" <David.Choi@Micrel.Com>
Date: Thu, 17 Sep 2009 12:30:27 -0700
> --- linux-2.6.31-rc3/drivers/net/ks8851_mll.c.orig 2009-09-17
> 10:18:56.000000000 -0700
> +++ linux-2.6.31-rc3/drivers/net/ks8851_mll.c 2009-09-17
> 10:09:37.000000000 -0700
> @@ -21,8 +21,6 @@
> * KS8851 16bit MLL chip from Micrel Inc.
I can't use this patch or even test it, as your email client
has corrupted it by, for example, breaking up long lines.
^ permalink raw reply
* [net-2.6 PATCH] igb: resolve namespacecheck warning for igb_hash_mc_addr
From: Jeff Kirsher @ 2009-09-18 0:52 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, Alexander Duyck, Jeff Kirsher
From: Alexander Duyck <alexander.h.duyck@intel.com>
This patch resolves a warning seen when doing namespace checking via
"make namespacecheck"
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
drivers/net/igb/e1000_mac.c | 72 ++++++++++++++++++++++---------------------
drivers/net/igb/e1000_mac.h | 1 -
2 files changed, 36 insertions(+), 37 deletions(-)
diff --git a/drivers/net/igb/e1000_mac.c b/drivers/net/igb/e1000_mac.c
index a0231cd..7d76bb0 100644
--- a/drivers/net/igb/e1000_mac.c
+++ b/drivers/net/igb/e1000_mac.c
@@ -286,41 +286,6 @@ void igb_mta_set(struct e1000_hw *hw, u32 hash_value)
}
/**
- * igb_update_mc_addr_list - Update Multicast addresses
- * @hw: pointer to the HW structure
- * @mc_addr_list: array of multicast addresses to program
- * @mc_addr_count: number of multicast addresses to program
- *
- * Updates entire Multicast Table Array.
- * The caller must have a packed mc_addr_list of multicast addresses.
- **/
-void igb_update_mc_addr_list(struct e1000_hw *hw,
- u8 *mc_addr_list, u32 mc_addr_count)
-{
- u32 hash_value, hash_bit, hash_reg;
- int i;
-
- /* clear mta_shadow */
- memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
-
- /* update mta_shadow from mc_addr_list */
- for (i = 0; (u32) i < mc_addr_count; i++) {
- hash_value = igb_hash_mc_addr(hw, mc_addr_list);
-
- hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
- hash_bit = hash_value & 0x1F;
-
- hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
- mc_addr_list += (ETH_ALEN);
- }
-
- /* replace the entire MTA table */
- for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
- array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
- wrfl();
-}
-
-/**
* igb_hash_mc_addr - Generate a multicast hash value
* @hw: pointer to the HW structure
* @mc_addr: pointer to a multicast address
@@ -329,7 +294,7 @@ void igb_update_mc_addr_list(struct e1000_hw *hw,
* the multicast filter table array address and new table value. See
* igb_mta_set()
**/
-u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
+static u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
{
u32 hash_value, hash_mask;
u8 bit_shift = 0;
@@ -392,6 +357,41 @@ u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
}
/**
+ * igb_update_mc_addr_list - Update Multicast addresses
+ * @hw: pointer to the HW structure
+ * @mc_addr_list: array of multicast addresses to program
+ * @mc_addr_count: number of multicast addresses to program
+ *
+ * Updates entire Multicast Table Array.
+ * The caller must have a packed mc_addr_list of multicast addresses.
+ **/
+void igb_update_mc_addr_list(struct e1000_hw *hw,
+ u8 *mc_addr_list, u32 mc_addr_count)
+{
+ u32 hash_value, hash_bit, hash_reg;
+ int i;
+
+ /* clear mta_shadow */
+ memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
+
+ /* update mta_shadow from mc_addr_list */
+ for (i = 0; (u32) i < mc_addr_count; i++) {
+ hash_value = igb_hash_mc_addr(hw, mc_addr_list);
+
+ hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
+ hash_bit = hash_value & 0x1F;
+
+ hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
+ mc_addr_list += (ETH_ALEN);
+ }
+
+ /* replace the entire MTA table */
+ for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
+ array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
+ wrfl();
+}
+
+/**
* igb_clear_hw_cntrs_base - Clear base hardware counters
* @hw: pointer to the HW structure
*
diff --git a/drivers/net/igb/e1000_mac.h b/drivers/net/igb/e1000_mac.h
index 7518af8..bca17d8 100644
--- a/drivers/net/igb/e1000_mac.h
+++ b/drivers/net/igb/e1000_mac.h
@@ -88,6 +88,5 @@ enum e1000_mng_mode {
#define E1000_MNG_DHCP_COOKIE_STATUS_VLAN 0x2
extern void e1000_init_function_pointers_82575(struct e1000_hw *hw);
-extern u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr);
#endif
^ permalink raw reply related
* [net-2.6 PATCH 1/6] net: initialize rmem_alloc and omem_alloc to 0 in netlink socket
From: Jeff Kirsher @ 2009-09-18 0:57 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
From: John Fastabend <john.r.fastabend@intel.com>
The rmem_alloc and omem_alloc socket fields are not
initialized. This sets each variable to zero when a socket
is created. Note the sk_wmem_alloc is already initialized
in sock_init_data.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/netlink/af_netlink.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index c5aab6a..4e673d2 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -423,6 +423,9 @@ static int __netlink_create(struct net *net, struct socket *sock,
}
init_waitqueue_head(&nlk->wait);
+ atomic_set(&sk->sk_rmem_alloc, 0);
+ atomic_set(&sk->sk_omem_alloc, 0);
+
sk->sk_destruct = netlink_sock_destruct;
sk->sk_protocol = protocol;
return 0;
^ permalink raw reply related
* [net-2.6 PATCH 2/6] net: remove kfree_skb on a NULL pointer in af_netlink.c
From: Jeff Kirsher @ 2009-09-18 0:57 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: John Fastabend <john.r.fastabend@intel.com>
This removes a kfree_skb that is being called on a NULL pointer when
do_one_broadcast() is sucessful. And moves the kfree_skb into
do_one_broadcast() for the error case.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/netlink/af_netlink.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 4e673d2..9934847 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1021,6 +1021,8 @@ static inline int do_one_broadcast(struct sock *sk,
netlink_overrun(sk);
if (nlk->flags & NETLINK_BROADCAST_SEND_ERROR)
p->delivery_failure = 1;
+ kfree_skb(p->skb2);
+ p->skb2 = NULL;
} else {
p->congested |= val;
p->delivered = 1;
@@ -1065,8 +1067,6 @@ int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
netlink_unlock_table();
- kfree_skb(info.skb2);
-
if (info.delivery_failure)
return -ENOBUFS;
^ permalink raw reply related
* [net-2.6 PATCH 3/6] net: fix vlan_get_size to include vlan_flags size
From: Jeff Kirsher @ 2009-09-18 0:57 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: John Fastabend <john.r.fastabend@intel.com>
Fix vlan_get_size to include vlan->flags. Currently, the
size of the vlan flags is not included in the nlmsg size.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/8021q/vlan_netlink.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c
index 343146e..a915048 100644
--- a/net/8021q/vlan_netlink.c
+++ b/net/8021q/vlan_netlink.c
@@ -169,6 +169,7 @@ static size_t vlan_get_size(const struct net_device *dev)
struct vlan_dev_info *vlan = vlan_dev_info(dev);
return nla_total_size(2) + /* IFLA_VLAN_ID */
+ sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
vlan_qos_map_size(vlan->nr_ingress_mappings) +
vlan_qos_map_size(vlan->nr_egress_mappings);
}
^ permalink raw reply related
* [net-2.6 PATCH 4/6] net: fix nlmsg len size for skb when error bit is set.
From: Jeff Kirsher @ 2009-09-18 0:58 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: John Fastabend <john.r.fastabend@intel.com>
Currently, the nlmsg->len field is not set correctly in netlink_ack()
for ack messages that include the nlmsg of the error frame. This
corrects the length field passed to __nlmsg_put to use the correct
payload size.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/netlink/af_netlink.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 9934847..aa74011 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1788,7 +1788,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
}
rep = __nlmsg_put(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
- NLMSG_ERROR, sizeof(struct nlmsgerr), 0);
+ NLMSG_ERROR, payload, 0);
errmsg = nlmsg_data(rep);
errmsg->error = err;
memcpy(&errmsg->msg, nlh, err ? nlh->nlmsg_len : sizeof(*nlh));
^ permalink raw reply related
* [net-2.6 PATCH 5/6] net: fix sock locking for sk_err field in netlink.
From: Jeff Kirsher @ 2009-09-18 0:58 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: John Fastabend <john.r.fastabend@intel.com>
This adds the sock lock around setting the sk_err field
in sock struct. Without the lock multiple threads may
write to this field.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/netlink/af_netlink.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index aa74011..1669dfc 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -732,7 +732,9 @@ static void netlink_overrun(struct sock *sk)
if (!(nlk->flags & NETLINK_RECV_NO_ENOBUFS)) {
if (!test_and_set_bit(0, &nlk_sk(sk)->state)) {
+ lock_sock(sk);
sk->sk_err = ENOBUFS;
+ release_sock(sk);
sk->sk_error_report(sk);
}
}
@@ -1101,7 +1103,9 @@ static inline int do_one_set_err(struct sock *sk,
!test_bit(p->group - 1, nlk->groups))
goto out;
+ lock_sock(sk);
sk->sk_err = p->code;
+ release_sock(sk);
sk->sk_error_report(sk);
out:
return 0;
@@ -1780,7 +1784,9 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
in_skb->sk->sk_protocol,
NETLINK_CB(in_skb).pid);
if (sk) {
+ lock_sock(sk);
sk->sk_err = ENOBUFS;
+ release_sock(sk);
sk->sk_error_report(sk);
sock_put(sk);
}
^ permalink raw reply related
* [net-2.6 PATCH 6/6] net: fix double skb free in dcbnl
From: Jeff Kirsher @ 2009-09-18 0:58 UTC (permalink / raw)
To: davem; +Cc: netdev, gospo, linux-scsi, John Fastabend, Jeff Kirsher
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: John Fastabend <john.r.fastabend@intel.com>
netlink_unicast() calls kfree_skb even in the error case.
dcbnl calls netlink_unicast() which when it fails free's the
skb and returns an error value. dcbnl is free'ing the skb
again when this error occurs. This patch removes the double
free.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
net/dcb/dcbnl.c | 15 +++++++--------
1 files changed, 7 insertions(+), 8 deletions(-)
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index e0879bf..ac1205d 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -194,7 +194,7 @@ static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
nlmsg_end(dcbnl_skb, nlh);
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ return -EINVAL;
return 0;
nlmsg_failure:
@@ -275,7 +275,7 @@ static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ goto err_out;
return 0;
nlmsg_failure:
@@ -316,12 +316,11 @@ static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ goto err_out;
return 0;
nlmsg_failure:
-err:
kfree_skb(dcbnl_skb);
err_out:
return -EINVAL;
@@ -383,7 +382,7 @@ static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ goto err_out;
return 0;
nlmsg_failure:
@@ -460,7 +459,7 @@ static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret) {
ret = -EINVAL;
- goto err;
+ goto err_out;
}
return 0;
@@ -799,7 +798,7 @@ static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ goto err_out;
return 0;
@@ -1063,7 +1062,7 @@ static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
if (ret)
- goto err;
+ goto err_out;
return 0;
^ permalink raw reply related
* Re: [net-2.6 PATCH 2/6] net: remove kfree_skb on a NULL pointer in af_netlink.c
From: David Miller @ 2009-09-18 1:24 UTC (permalink / raw)
To: jeffrey.t.kirsher; +Cc: netdev, gospo, linux-scsi, john.r.fastabend
In-Reply-To: <20090918005729.25594.14261.stgit@localhost.localdomain>
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Thu, 17 Sep 2009 17:57:29 -0700
> From: John Fastabend <john.r.fastabend@intel.com>
>
> This removes a kfree_skb that is being called on a NULL pointer when
> do_one_broadcast() is sucessful. And moves the kfree_skb into
> do_one_broadcast() for the error case.
>
> Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
kfree_skb() on a NULL pointer is completely legal.
^ permalink raw reply
* Re: [net-2.6 PATCH 5/6] net: fix sock locking for sk_err field in netlink.
From: David Miller @ 2009-09-18 1:27 UTC (permalink / raw)
To: jeffrey.t.kirsher; +Cc: netdev, gospo, linux-scsi, john.r.fastabend
In-Reply-To: <20090918005832.25594.45086.stgit@localhost.localdomain>
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Thu, 17 Sep 2009 17:58:32 -0700
> From: John Fastabend <john.r.fastabend@intel.com>
>
> This adds the sock lock around setting the sk_err field
> in sock struct. Without the lock multiple threads may
> write to this field.
>
> Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This isn't right.
Writes to sk->sk_err can occur asynchronously just fine and
without any locking.
The only requirement is that consumers of the sk_err value
use sock_error() which uses xchg() to get and clear the
value atomically.
^ permalink raw reply
* Re: [net-2.6 PATCH 1/6] net: initialize rmem_alloc and omem_alloc to 0 in netlink socket
From: David Miller @ 2009-09-18 1:29 UTC (permalink / raw)
To: jeffrey.t.kirsher; +Cc: netdev, gospo, linux-scsi, john.r.fastabend
In-Reply-To: <20090918005708.25594.52575.stgit@localhost.localdomain>
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Thu, 17 Sep 2009 17:57:09 -0700
> From: John Fastabend <john.r.fastabend@intel.com>
>
> The rmem_alloc and omem_alloc socket fields are not
> initialized. This sets each variable to zero when a socket
> is created. Note the sk_wmem_alloc is already initialized
> in sock_init_data.
>
> Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
It's set to zero implicitly by the memset() done at sock_alloc()
time.
Re-setting it again here explicitly will just add unnecessary
memory traffic.
^ permalink raw reply
* Re: Netlink API for bonding ?
From: Stephen Hemminger @ 2009-09-18 4:00 UTC (permalink / raw)
To: Nicolas de Pesloüan; +Cc: Jay Vosburgh, bonding-devel, netdev, Jiri Pirko
In-Reply-To: <4AB2B3EF.50307@free.fr>
On Fri, 18 Sep 2009 00:10:55 +0200
Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:
> Stephen Hemminger wrote:
> > On Thu, 17 Sep 2009 23:44:30 +0200
> > Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:
> >
> >> Stephen Hemminger wrote:
> >>> On Mon, 31 Aug 2009 22:34:50 +0200
> >>> Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:
> >>>
> >>>> Stephen,
> >>>>
> >>>> Can you please describe the netlink API you plan to implement for bonding ?
> >>>>
> >>>> Both Jiri Pirko and I plan to add some advanced active slave selection rules,
> >>>> for more-than-two-slaves bonding configuration.
> >>>>
> >>>> Jay suggested that such advanced features be implemented in user space, using
> >>>> netlink to notify a daemon when slaves come up or fall down. I agree with Jay,
> >>>> but don't want to design something without having first a view at your proposed
> >>>> API for bonding.
> >>>>
> >>>> Do you plan to have some notification to user space, or only the ability to read
> >>>> and set bonding configuration using netlink ?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Nicolas.
> >>> No paper spec, but was looking to add interface similar to vlan and macvlan.
> >>> Just use (and extend if needed) existing rtnl_link_ops.
> >>>
> >>>
> >>> Was not planning on adding a notification interface, thats good idea but
> >>> really not what I was looking at.
> >> What kind of notification system would you suggest to notify userland that a
> >> given bond device just lose the current active slave ?
> >
> > First why should user land care? Unless all slaves are gone maybe it
> > should just be transparent.
>
> Because we try to design a notification from kernel to userland when current
> active slave fail, to give an opportunity to userland to decide which non-failed
> slave should become the new active one. This is in order to try and move complex
> decisions to userland, only keeping very simple "two slaves" decisions into the
> kernel.
>
> Think of it as the bonding counter part of moving STP to userland for bridge.
> Userland should be able to decide which slave should be the active one for the
> same reasons userland is able to decide which bridge port should be forwarding
> and which should be blocked.
>
> I assume that we cannot just try to make the current bridge userland
> notification system more generic. May be I'm wrong. May be the ability to notify
> port failure, port coming back and BPDU for bridge is a superset of what we need
> to notify port failure and port coming back for bonding.
>
> > Use existing link ops mechanism (see vlan and macvlan). You may need
> > to add new operations, but these should be generic enough so that bonding and bridging
> > have same operations.
> >
> > .newlink => create bond device
> > .dellink => remove bond device
> > .newport => add slave
> > .delport => remove slave
> >
> > Also, dellink should always work (even if slaves are present).
>
> This sounds perfect for setup, but might not be good the elect the "best" port
> (active slave). Also, I assume a new RTNETLINK operation needs to be added for
> that. I thought that this was what you were working on. Do I miss something ?
> Does brctl use RTNETLINK for port setup ? Or do you plan to use iproute2 to
> replace brctl in the futur ?
I got to busy to get past making bonding amenable to using newlink/delink.
One common way to handle changes is to send another NEWXXX message with
different parameters (TLV values).
> > The terminology slave is not widely used outside of bonding, and so probably
> > shouldn't be buried in the API.
>
> Yes, you are definitely right with this point.
>
> Nicolas.
^ permalink raw reply
* Re: [PATCH] ks8851_ml ethernet network driver
From: Greg KH @ 2009-09-18 5:27 UTC (permalink / raw)
To: David Miller; +Cc: David.Choi, netdev, Charles.Li, Choi, jgarzik, shemminger
In-Reply-To: <20090917.164952.33104590.davem@davemloft.net>
On Thu, Sep 17, 2009 at 04:49:52PM -0700, David Miller wrote:
> From: "Choi, David" <David.Choi@Micrel.Com>
> Date: Thu, 17 Sep 2009 12:30:27 -0700
>
> > --- linux-2.6.31-rc3/drivers/net/ks8851_mll.c.orig 2009-09-17
> > 10:18:56.000000000 -0700
> > +++ linux-2.6.31-rc3/drivers/net/ks8851_mll.c 2009-09-17
> > 10:09:37.000000000 -0700
> > @@ -21,8 +21,6 @@
> > * KS8851 16bit MLL chip from Micrel Inc.
>
> I can't use this patch or even test it, as your email client
> has corrupted it by, for example, breaking up long lines.
Yeah, that's why I had to post the original patch for David :(
I'm going to be away from email for the next 10 days due to conferences,
so hopefully David can fix the email issue so he can repost it
himself...
thanks,
greg k-h
^ permalink raw reply
* Re: ipv4 regression in 2.6.31 ?
From: Stephan von Krawczynski @ 2009-09-18 8:30 UTC (permalink / raw)
To: Stephen Hemminger
Cc: Jarek Poplawski, David Miller, Eric Dumazet, linux-kernel,
Linux Netdev List
In-Reply-To: <20090916100028.654f7893@nehalam>
On Wed, 16 Sep 2009 10:00:28 -0700
Stephen Hemminger <shemminger@vyatta.com> wrote:
> On Wed, 16 Sep 2009 05:23:04 +0000
> Jarek Poplawski <jarkao2@gmail.com> wrote:
>
> > On Tue, Sep 15, 2009 at 03:57:19PM -0700, Stephen Hemminger wrote:
> > > On Tue, 15 Sep 2009 08:13:55 +0000
> > > Jarek Poplawski <jarkao2@gmail.com> wrote:
> > >
> > > > On 14-09-2009 18:31, Stephen Hemminger wrote:
> > > > > On Mon, 14 Sep 2009 17:55:05 +0200
> > > > > Stephan von Krawczynski <skraw@ithnet.com> wrote:
> > > > >
> > > > >> On Mon, 14 Sep 2009 15:57:03 +0200
> > > > >> Eric Dumazet <eric.dumazet@gmail.com> wrote:
> > > > >>
> > > > >>> Stephan von Krawczynski a A~(c)crit :
> > > > >>>> Hello all,
> > > > ...
> > > > >>> rp_filter - INTEGER
> > > > >>> 0 - No source validation.
> > > > >>> 1 - Strict mode as defined in RFC3704 Strict Reverse Path
> > > > >>> Each incoming packet is tested against the FIB and if the interface
> > > > >>> is not the best reverse path the packet check will fail.
> > > > >>> By default failed packets are discarded.
> > > > >>> 2 - Loose mode as defined in RFC3704 Loose Reverse Path
> > > > >>> Each incoming packet's source address is also tested against the FIB
> > > > >>> and if the source address is not reachable via any interface
> > > > >>> the packet check will fail.
> > > > ...
> > > > > RP filter did not work correctly in 2.6.30. The code added to to the loose
> > > > > mode caused a bug; the rp_filter value was being computed as:
> > > > > rp_filter = interface_value & all_value;
> > > > > So in order to get reverse path filter both would have to be set.
> > > > >
> > > > > In 2.6.31 this was change to:
> > > > > rp_filter = max(interface_value, all_value);
> > > > >
> > > > > This was the intended behaviour, if user asks all interfaces to have rp
> > > > > filtering turned on, then set /proc/sys/net/ipv4/conf/all/rp_filter = 1
> > > > > or to turn on just one interface, set it for just that interface.
> > > >
> > > > Alas this max() formula handles also cases where both values are set
> > > > and it doesn't look very natural/"user friendly" to me. Especially
> > > > with something like this: all_value = 2; interface_value = 1
> > > > Why would anybody care to bother with interface_value in such a case?
> > > >
> > > > "All" suggests "default" in this context, so I'd rather expect
> > > > something like:
> > > > rp_filter = interface_value ? : all_value;
> > > > which gives "the inteded behaviour" too, plus more...
> > > >
> > > > We'd only need to add e.g.:
> > > > 0 - Default ("all") validation. (No source validation if "all" is 0).
> > > > 3 - No source validation on this interface.
> > >
> > > More values == more confusion.
> > > I chose the maxconf() method to make rp_filter consistent with other
> > > multi valued variables (arp_announce and arp_ignore).
> >
> > This additional value is not necessary (it'd give as superpowers).
> > Max seems logical to me only when values are sorted (especially if
> > max is the strictest).
>
> The values had to be unsorted because of the requirement to retain
> interface compatibility with older releases.
The parameters are the same (I guess this is what you call interface
compatibility), but the function came out different, meaning you broke
functional compatibility with 2.6.31 instead. Just to mention that - though
the argument is leight-weight for the compatibility broke because the whole
thing was broken somehow before the bugfix.
--
Regards,
Stephan
^ permalink raw reply
* tcp_sock variable initialization
From: Armin Abfalterer @ 2009-09-18 8:50 UTC (permalink / raw)
To: netdev
Hi!
I need a control variable (ecnn_flags) in tcp_sock that should be set
properly after the 3-way-handshake in tcp_create_openreq_child(). If I
set the variable in its value is always 0 afterwards.
struct sock *tcp_create_openreq_child( ... )
{
struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC);
if (newsk != NULL) {
struct tcp_sock *newtp;
newtp = tcp_sk(newsk);
newtp->ecnn_flags |= TCP_ECN_NONCE_OK;
}
}
When I read the variable for the next outgoing segment the values is not
set.
static int tcp_transmit_skb( ... )
{
struct tcp_sock *tp;
if (tp->ecnn_flags & TCP_ECN_NONCE_OK) {
/*
* never entered!!!!
*/
}
}
I'm quite sure that it has to do with the creation of the big socket
when the connection enters TCP_ESTABLISHED but searching for hours
didn't help to find the right place where my variable is re-initialized.
Any hint in the right direction would greatly appreciated!!! Thanks!
Armin
^ permalink raw reply
* Re: tun: Return -EINVAL if neither IFF_TUN nor IFF_TAP is set.
From: Paul Moore @ 2009-09-18 11:54 UTC (permalink / raw)
To: Kusanagi Kouichi; +Cc: netdev, linux-kernel
In-Reply-To: <20090917073614.15217260031@msa105lp.auone-net.jp>
On Thursday 17 September 2009 03:36:13 am Kusanagi Kouichi wrote:
> After commit 2b980dbd77d229eb60588802162c9659726b11f4
> ("lsm: Add hooks to the TUN driver") tun_set_iff doesn't
> return -EINVAL though neither IFF_TUN nor IFF_TAP is set.
>
> Signed-off-by: Kusanagi Kouichi <slash@ma.neweb.ne.jp>
Sorry about that, my mistake, thanks for finding and fixing this.
Reviewed-by: Paul Moore <paul.moore@hp.com>
> ---
> drivers/net/tun.c | 4 +---
> 1 files changed, 1 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 3f5d288..e091756 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -946,8 +946,6 @@ static int tun_set_iff(struct net *net, struct file
> *file, struct ifreq *ifr) char *name;
> unsigned long flags = 0;
>
> - err = -EINVAL;
> -
> if (!capable(CAP_NET_ADMIN))
> return -EPERM;
> err = security_tun_dev_create();
> @@ -964,7 +962,7 @@ static int tun_set_iff(struct net *net, struct file
> *file, struct ifreq *ifr) flags |= TUN_TAP_DEV;
> name = "tap%d";
> } else
> - goto failed;
> + return -EINVAL;
>
> if (*ifr->ifr_name)
> name = ifr->ifr_name;
>
--
paul moore
linux @ hp
^ permalink raw reply
* [PATCH net-next-2.6] bonding: set primary param via sysfs
From: Jiri Pirko @ 2009-09-18 12:13 UTC (permalink / raw)
To: netdev; +Cc: davem, fubar, bonding-devel
Primary module parameter passed to bonding is pernament. That means if you
release the primary slave and enslave it again, it becomes the primary slave
again. But if you set primary slave via sysfs, the primary slave is only set
once and it's not remembered in bond->params structure. Therefore the setting is
lost after releasing the primary slave. This simple one-liner fixes this.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 6044e12..ff449de 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1182,6 +1182,7 @@ static ssize_t bonding_store_primary(struct device *d,
": %s: Setting %s as primary slave.\n",
bond->dev->name, slave->dev->name);
bond->primary_slave = slave;
+ strcpy(bond->params.primary, slave->dev->name);
bond_select_active_slave(bond);
goto out;
}
^ permalink raw reply related
* RE: [RFC] CAIF Protocol Stack
From: Sjur Brændeland @ 2009-09-18 12:01 UTC (permalink / raw)
To: David Miller; +Cc: netdev
Hi David.
I understand that you are one of the main Maintainers of netdev.
As explained below we have a largeish driver we would like to contribute.
I realize we should have started contributing this on a earlier stage...., but
What is the preferred way of doing this, i.e. how should we split it up?
Submit the whole shebang,
Or
Split Horizontally e.g. a) CAIF-Protocol, b) GPRS-Net-Device c) CAIF-Link Layer
Or
Split Vertically e.g. a) Payload Path Net-Device, b) Payload Path AT-channel, c) Configuration
Which kernel GIT should we base the patch set on?
Any hints on this would be greatly appreciated.
Best Regards
Sjur Brændeland
ST-Ericsson
> -----Original Message-----
> From: Sjur Brændeland
> Sent: 16. september 2009 14:31
> To: 'netdev@vger.kernel.org'
> Subject: [RFC] CAIF Protocol Stack
>
> Hello,
>
> We are currently working on a patch set in order to introduce
> the CAIF protocol in Linux. CAIF (Communication CPU to
> Application CPU Interface) is the primary protocol used to
> communicate between to ST-Ericsson modem and external host system.
>
> The host processes can use CAIF to open virtual AT channels,
> initiate GPRS Data connections, Video channels and Utility Channels.
> The Utility Channels are general purpose pipes between modem and host.
>
> ST-Ericsson modems support a number of Link Layers between
> modem and host, currently Uart and Shared Memory are
> available for Linux.
>
> Architecture:
> ------------
> The Implementation of CAIF is divided into:
> * CAIF Devices: Character Device, Net Device and Kernel API.
> * CAIF Protocol Implementation
> * CAIF Link Layer
>
> In order to configure the devices a set of IOCTLs is used.
>
>
>
> IOCTL
> !
> ! +------+ +------+ +------+
> ! +------+! +------+! +------+!
> ! ! Chr !! !Kernel!! ! Net !!
> ! ! Dev !+ ! API !+ ! Dev !+ <- CAIF Devices
> ! +------+ +------! +------+
> ! ! ! !
> ! +----------!----------+
> ! +------+ <- CAIF Protocol
> Implementation
> +-------> ! CAIF ! /dev/caifconfig
> +------+
> +--------!--------+
> ! !
> +------+ +-----+
> !ShMem ! ! TTY ! <- Link Layer
> +------+ +-----+
>
> Any comments welcome.
>
>
>
> Files:
> -----
>
> net/caif/Kconfig | 61 +
> net/caif/Makefile | 62 +
> net/caif/caif_chnlif.c | 209 ++++
> net/caif/caif_chr.c | 392 +++++++
> net/caif/caif_config_util.c | 279 +++++
> net/caif/chnl_chr.c | 1161
> ++++++++++++++++++++
> net/caif/chnl_net.c | 338 ++++++
> net/caif/generic/cfcnfg.c | 722
> ++++++++++++
> net/caif/generic/cfctrl.c | 640 +++++++++++
> net/caif/generic/cfdgml.c | 119 ++
> net/caif/generic/cffrml.c | 144 +++
> net/caif/generic/cflist.c | 99 ++
> net/caif/generic/cfloopcfg.c | 93 ++
> net/caif/generic/cflooplayer.c | 113 ++
> net/caif/generic/cfmsll.c | 55 +
> net/caif/generic/cfmuxl.c | 270 +++++
> net/caif/generic/cfpkt_skbuff.c | 545 +++++++++
> net/caif/generic/cfrfml.c | 112 ++
> net/caif/generic/cfserl.c | 297 +++++
> net/caif/generic/cfshml.c | 67 ++
> net/caif/generic/cfspil.c | 245 ++++
> net/caif/generic/cfsrvl.c | 177 +++
> net/caif/generic/cfutill.c | 115 ++
> net/caif/generic/cfveil.c | 118 ++
> net/caif/generic/cfvidl.c | 68 ++
> net/caif/generic/fcs.c | 58 +
>
> drivers/net/caif/Kconfig | 58 +
> drivers/net/caif/Makefile | 29 +
> drivers/net/caif/chnl_tty.c | 217 ++++
> drivers/net/caif/phyif_loop.c | 418 +++++++
> drivers/net/caif/phyif_ser.c | 182 +++
> drivers/net/caif/phyif_shm.c | 838
> ++++++++++++++
> drivers/net/caif/shm.h | 95 ++
> drivers/net/caif/shm_cfgifc.c | 63 ++
> drivers/net/caif/shm_mbxifc.c | 104 ++
> drivers/net/caif/shm_smbx.c | 78 ++
>
> include/linux/caif/caif_config.h | 231 ++++
> include/linux/caif/caif_ioctl.h | 106 ++
> include/net/caif/caif_actions.h | 81 ++
> include/net/caif/caif_chr.h | 46 +
> include/net/caif/caif_config_util.h | 27 +
> include/net/caif/caif_kernel.h | 324 ++++++
> include/net/caif/caif_log.h | 57 +
> include/net/caif/generic/caif_layer.h | 476 ++++++++
> include/net/caif/generic/cfcnfg.h | 223 ++++
> include/net/caif/generic/cfctrl.h | 139 +++
> include/net/caif/generic/cffrml.h | 29 +
> include/net/caif/generic/cfglue.h | 387 +++++++
> include/net/caif/generic/cfloopcfg.h | 28 +
> include/net/caif/generic/cflst.h | 27 +
> include/net/caif/generic/cfmsll.h | 22 +
> include/net/caif/generic/cfmuxl.h | 30 +
> include/net/caif/generic/cfpkt.h | 246 +++++
> include/net/caif/generic/cfserl.h | 22 +
> include/net/caif/generic/cfshml.h | 21 +
> include/net/caif/generic/cfspil.h | 80 ++
> include/net/caif/generic/cfsrvl.h | 48 +
> include/net/caif/generic/fcs.h | 22 +
>
>
>
> Regards
> Sjur Brandeland
> ST-Ericsson
^ permalink raw reply
* Re: [RFC] CAIF Protocol Stack
From: Rémi Denis-Courmont @ 2009-09-18 12:31 UTC (permalink / raw)
To: netdev
In-Reply-To: <61D8D34BB13CFE408D154529C120E07902DF9076@eseldmw101.eemea.ericsson.se>
Hello,
On Wed, 16 Sep 2009 14:30:34 +0200, Sjur Brændeland
<sjur.brandeland@stericsson.com> wrote:
> The Implementation of CAIF is divided into:
> * CAIF Devices: Character Device, Net Device and Kernel API.
> * CAIF Protocol Implementation
> * CAIF Link Layer
I'm a bit confused here. What do you call a CAIF Device?
Do you mean a GPRS context is a network device, and an AT command interface
is a character device? Or is the CAIF modem a device? or what?
--
Rémi Denis-Courmont
^ permalink raw reply
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