From a2e2725541fad72416326798c2d7fa4dafb7d337 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 12 Oct 2009 23:40:10 -0700 Subject: 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. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- 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 + 4 files changed, 4 insertions(+) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S index fd2a9bb620d6..17202bbe843f 100644 --- a/arch/mips/kernel/scall32-o32.S +++ b/arch/mips/kernel/scall32-o32.S @@ -583,6 +583,7 @@ einval: li v0, -ENOSYS sys sys_rt_tgsigqueueinfo 4 sys sys_perf_event_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 18bf7f32c5e4..a8a6c596eb04 100644 --- a/arch/mips/kernel/scall64-64.S +++ b/arch/mips/kernel/scall64-64.S @@ -420,4 +420,5 @@ sys_call_table: PTR sys_rt_tgsigqueueinfo PTR sys_perf_event_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 6ebc07976694..5154e64f7cfe 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_event_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 9bbf9775e0bd..d0eff53d7cb9 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_event_open PTR sys_accept4 + PTR compat_sys_recvmmsg .size sys_call_table,.-sys_call_table -- cgit v1.2.1 From aff639cdcfe7450e04109be3759faa8f1e5572f5 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 3 Apr 2009 00:46:47 -0700 Subject: sysctl: mips Use the compat_sys_sysctl Now that we have a generic 32bit compatibility implementation there is no need for mips to implement it's own. Cc: Ralf Baechle Signed-off-by: Eric W. Biederman --- arch/mips/kernel/linux32.c | 61 ------------------------------------------ arch/mips/kernel/scall64-n32.S | 2 +- arch/mips/kernel/scall64-o32.S | 2 +- 3 files changed, 2 insertions(+), 63 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index b77fefaff9da..1a2793efdc4e 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -265,67 +265,6 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, } #endif -struct sysctl_args32 -{ - compat_caddr_t name; - int nlen; - compat_caddr_t oldval; - compat_caddr_t oldlenp; - compat_caddr_t newval; - compat_size_t newlen; - unsigned int __unused[4]; -}; - -#ifdef CONFIG_SYSCTL_SYSCALL - -SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) -{ - struct sysctl_args32 tmp; - int error; - size_t oldlen; - size_t __user *oldlenp = NULL; - unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; - - if (copy_from_user(&tmp, args, sizeof(tmp))) - return -EFAULT; - - if (tmp.oldval && tmp.oldlenp) { - /* Duh, this is ugly and might not work if sysctl_args - is in read-only memory, but do_sysctl does indirectly - a lot of uaccess in both directions and we'd have to - basically copy the whole sysctl.c here, and - glibc's __sysctl uses rw memory for the structure - anyway. */ - if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) || - put_user(oldlen, (size_t __user *)addr)) - return -EFAULT; - oldlenp = (size_t __user *)addr; - } - - lock_kernel(); - error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval), - oldlenp, (void __user *)A(tmp.newval), tmp.newlen); - unlock_kernel(); - if (oldlenp) { - if (!error) { - if (get_user(oldlen, (size_t __user *)addr) || - put_user(oldlen, (u32 __user *)A(tmp.oldlenp))) - error = -EFAULT; - } - copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)); - } - return error; -} - -#else - -SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) -{ - return -ENOSYS; -} - -#endif /* CONFIG_SYSCTL_SYSCALL */ - SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name) { int ret = 0; diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 6ebc07976694..8a0be0bdebad 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -272,7 +272,7 @@ EXPORT(sysn32_call_table) PTR sys_munlockall PTR sys_vhangup /* 6150 */ PTR sys_pivot_root - PTR sys_32_sysctl + PTR compat_sys_sysctl PTR sys_prctl PTR compat_sys_adjtimex PTR compat_sys_setrlimit /* 6155 */ diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index 14dde4ca932e..41dbdb7d67e5 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -356,7 +356,7 @@ sys_call_table: PTR sys_ni_syscall /* 4150 */ PTR sys_getsid PTR sys_fdatasync - PTR sys_32_sysctl + PTR compat_sys_sysctl PTR sys_mlock PTR sys_munlock /* 4155 */ PTR sys_mlockall -- cgit v1.2.1 From a91be9ee69b09cdaa02afd5d7056bc2e6d382cfe Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 2 Dec 2009 11:33:03 +0000 Subject: MIPS: Fix MIPS I build. Broken by d63c63e889bbeeaa461a8addf1245f89f3ce4ece (lmo) rsp. f1e39a4a616cd9981a9decfd5332fd07a01abb8b (kernel.org). Signed-off-by: Ralf Baechle Patchwork: http://patchwork.linux-mips.org/patch/746/ --- arch/mips/kernel/syscall.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index 3fe1fcfa2e73..fe0d79805603 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -306,6 +306,7 @@ static inline int mips_atomic_set(struct pt_regs *regs, if (cpu_has_llsc && R10000_LLSC_WAR) { __asm__ __volatile__ ( + " .set mips3 \n" " li %[err], 0 \n" "1: ll %[old], (%[addr]) \n" " move %[tmp], %[new] \n" @@ -320,6 +321,7 @@ static inline int mips_atomic_set(struct pt_regs *regs, " "STR(PTR)" 1b, 4b \n" " "STR(PTR)" 2b, 4b \n" " .previous \n" + " .set mips0 \n" : [old] "=&r" (old), [err] "=&r" (err), [tmp] "=&r" (tmp) @@ -329,6 +331,7 @@ static inline int mips_atomic_set(struct pt_regs *regs, : "memory"); } else if (cpu_has_llsc) { __asm__ __volatile__ ( + " .set mips3 \n" " li %[err], 0 \n" "1: ll %[old], (%[addr]) \n" " move %[tmp], %[new] \n" @@ -347,6 +350,7 @@ static inline int mips_atomic_set(struct pt_regs *regs, " "STR(PTR)" 1b, 5b \n" " "STR(PTR)" 2b, 5b \n" " .previous \n" + " .set mips0 \n" : [old] "=&r" (old), [err] "=&r" (err), [tmp] "=&r" (tmp) -- cgit v1.2.1