Neil Horman 3b885787ea net: Generalize socket rx gap / receive queue overflow cmsg ... Create a new socket level option to report number of queue overflows Recently I augmented the AF_PACKET protocol to report the number of frames lost on the socket receive queue between any two enqueued frames. This value was exported via a SOL_PACKET level cmsg. AFter I completed that work it was requested that this feature be generalized so that any datagram oriented socket could make use of this option. As such I've created this patch, It creates a new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue overflowed between any two given frames. It also augments the AF_PACKET protocol to take advantage of this new feature (as it previously did not touch sk->sk_drops, which this patch uses to record the overflow count). Tested successfully by me. Notes: 1) Unlike my previous patch, this patch simply records the sk_drops value, which is not a number of drops between packets, but rather a total number of drops. Deltas must be computed in user space. 2) While this patch currently works with datagram oriented protocols, it will also be accepted by non-datagram oriented protocols. I'm not sure if thats agreeable to everyone, but my argument in favor of doing so is that, for those protocols which aren't applicable to this option, sk_drops will always be zero, and reporting no drops on a receive queue that isn't used for those non-participating protocols seems reasonable to me. This also saves us having to code in a per-protocol opt in mechanism. 3) This applies cleanly to net-next assuming that commit 977750076d (my af packet cmsg patch) is reverted Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-10-12 13:26:31 -07:00
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dec
emma	MIPS: Eleminate filenames from comments	2009-08-03 17:52:40 +01:00
fw
ip32
lasat	MIPS: Lasat: Fix compilation	2009-09-17 20:07:42 +02:00
mach-ar7	MIPS: Add support for Texas Instruments AR7 System-on-a-Chip	2009-07-03 15:45:23 +01:00
mach-au1x00	MIPS: Alchemy: add gpio_request/gpio_free stubs for CONFIG_GPIOLIB=n	2009-09-17 20:07:42 +02:00
mach-bcm47xx	MIPS: BCM47xx: Fix gpio_direction_output	2009-06-17 11:06:28 +01:00
mach-bcm63xx	MIPS: BCM63xx: Add PCMCIA & Cardbus support.	2009-09-30 21:47:01 +02:00
mach-cavium-octeon	MIPS: Octeon: Set kernel_uses_llsc to false on non-SMP builds.	2009-09-17 20:07:50 +02:00
mach-cobalt	Update Yoichi Yuasa's e-mail address	2009-07-03 15:45:29 +01:00
mach-db1x00
mach-dec
mach-emma2rh
mach-excite
mach-generic	MIPS: Pass struct device to plat_dma_addr_to_phys()	2009-06-17 11:06:24 +01:00
mach-ip22
mach-ip27	cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node	2009-09-24 09:34:34 +09:30
mach-ip28
mach-ip32	MIPS: Pass struct device to plat_dma_addr_to_phys()	2009-06-17 11:06:24 +01:00
mach-jazz	MIPS: Pass struct device to plat_dma_addr_to_phys()	2009-06-17 11:06:24 +01:00
mach-lasat
mach-loongson	MIPS: Loongson: Add a machtype kernel command line argument	2009-09-17 20:07:47 +02:00
mach-malta	MIPS: Malta: Remove pointless use use of CONFIG_CPU_HAS_LLSC	2009-09-17 20:07:49 +02:00
mach-mipssim
mach-pb1x00
mach-pnx833x
mach-pnx8550
mach-rc32434	MIPS: RB532: Cleanup cpu-features-overrides	2009-06-17 11:06:26 +01:00
mach-rm
mach-sibyte
mach-tx39xx
mach-tx49xx
mach-vr41xx
mach-wrppmc
mach-yosemite
mips-boards	MIPS: Loongson: Change naming methods	2009-09-17 20:07:47 +02:00
octeon	MIPS: Octeon: Add hardware RNG platform device.	2009-09-17 20:07:51 +02:00
pci
pmc-sierra/msp71xx	MIPS: MSPxxxx: define MIPS34K_MISSED_ITLB_WAR for other PMC-Sierra SoC	2009-08-03 17:52:43 +01:00
sgi
sibyte
sn	MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.	2009-06-24 18:34:39 +01:00
txx9	MIPS: TXx9: Add TX4939 RNG support	2009-06-17 11:06:27 +01:00
vr41xx	Update Yoichi Yuasa's e-mail address	2009-07-03 15:45:29 +01:00
xtalk
abi.h
addrspace.h
amon.h	MIPS: CMP: activate CMP support	2009-07-03 15:45:26 +01:00
asm.h
asmmacro-32.h
asmmacro-64.h
asmmacro.h
atomic.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
auxvec.h
barrier.h
bcache.h
bitops.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
bootinfo.h	MIPS: Loongson: Add a machtype kernel command line argument	2009-09-17 20:07:47 +02:00
branch.h
break.h
bug.h	MIPS: bug.h Build fix - include <linux/compiler.h>.	2009-06-24 18:34:38 +01:00
bugs.h	MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.	2009-06-24 18:34:39 +01:00
byteorder.h
cache.h
cachectl.h
cacheflush.h
cacheops.h
cevt-r4k.h
checksum.h
cmp.h
cmpxchg.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
compat-signal.h
compat.h
compiler.h
cpu-features.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
cpu-info.h	MIPS: Outline udelay and fix a few issues.	2009-06-08 16:57:51 +01:00
cpu.h	MIPS: BCM63xx: Add Broadcom 63xx CPU definitions.	2009-09-17 20:07:52 +02:00
cputime.h
current.h
debug.h
delay.h	MIPS: Fix potencial build error in <asm/delay.h>	2009-09-17 20:07:41 +02:00
device.h
div64.h
dma-mapping.h
dma.h
ds1287.h	Update Yoichi Yuasa's e-mail address	2009-07-03 15:45:29 +01:00
dsp.h
edac.h
elf.h	MIPS: 64-bit: Fix o32 core dump	2009-07-03 15:45:27 +01:00
emergency-restart.h
errno.h
fb.h
fcntl.h
fixmap.h	MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.	2009-09-17 20:07:52 +02:00
floppy.h
fpregdef.h
fpu_emulator.h
fpu.h
ftrace.h
futex.h
gcmpregs.h	MIPS: CMP: Move gcmp_probe to before the SMP ops	2009-07-03 15:45:26 +01:00
gic.h	MIPS: Fix compile for !CONFIG_SMP	2009-08-03 17:52:40 +01:00
gpio.h
gt64120.h
hardirq.h	MIPS: Convert to asm-generic/hardirq.h	2009-09-17 20:07:48 +02:00
hazards.h
highmem.h
hugetlb.h	MIPS: Add support files for hugetlbfs.	2009-06-17 11:06:30 +01:00
hw_irq.h
i8253.h	time: move PIT_TICK_RATE to linux/timex.h	2009-06-16 19:47:27 -07:00
i8259.h
ide.h
inst.h
io.h
ioctl.h	MIPS: ioctl.h: Cleanup.	2009-06-17 11:06:28 +01:00
ioctls.h
ipcbuf.h
irq_cpu.h
irq_gt641xx.h	Update Yoichi Yuasa's e-mail address	2009-07-03 15:45:29 +01:00
irq_regs.h
irq.h	MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.	2009-06-24 18:34:39 +01:00
irqflags.h
isadep.h
jazz.h
jazzdma.h
Kbuild
kdebug.h
kexec.h
kgdb.h
kmap_types.h	kmap_types: make most arches use generic header file	2009-06-16 19:47:51 -07:00
kspd.h
linkage.h
local.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
m48t37.h
mc146818-time.h
mc146818rtc.h
mips_mt.h
mipsmtregs.h
mipsprom.h
mipsregs.h	MIPS: Add hugetlbfs page defines.	2009-06-17 11:06:30 +01:00
mman.h	mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions	2009-09-22 07:17:41 -07:00
mmu_context.h	cpumask: use mm_cpumask() wrapper: mips	2009-09-24 09:34:51 +09:30
mmu.h
mmzone.h
module.h
msc01_ic.h
msgbuf.h
mutex.h
nile4.h
paccess.h
page.h	MIPS: make page.h constants available to assembly.	2009-09-17 20:07:42 +02:00
param.h
parport.h
pci.h	PCI: remove pcibios_scan_all_fns()	2009-09-09 13:29:18 -07:00
percpu.h
pgalloc.h	mm: Remove duplicate definitions in MIPS and SH	2009-07-27 17:26:44 -07:00
pgtable-32.h
pgtable-64.h	MIPS: Shrink the size of tlb handler	2009-09-17 20:07:51 +02:00
pgtable-bits.h	MIPS: Add hugetlbfs page defines.	2009-06-17 11:06:30 +01:00
pgtable.h	mm: ZERO_PAGE without PTE_SPECIAL	2009-09-22 07:17:41 -07:00
pmon.h
poll.h
posix_types.h
prefetch.h
processor.h	MIPS: Avoid clobbering struct pt_regs in kthreads	2009-08-03 17:52:41 +01:00
ptrace.h
r4k-timer.h
r4kcache.h	MIPS: Support 64-byte D-cache line size	2009-06-17 11:06:24 +01:00
reboot.h
reg.h	MIPS: 64-bit: Fix o32 core dump	2009-07-03 15:45:27 +01:00
regdef.h
resource.h
rm9k-ocd.h
rtlx.h
scatterlist.h
seccomp.h
sections.h
segment.h
sembuf.h
serial.h
setup.h
sgialib.h
sgiarcs.h
sgidefs.h
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
sim.h
smp-ops.h	cpumask: arch_send_call_function_ipi_mask: mips	2009-09-24 09:34:45 +09:30
smp.h	MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask}	2009-09-30 21:47:00 +02:00
smtc_ipi.h
smtc_proc.h
smtc.h
smvp.h
sni.h
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h
sparsemem.h
spinlock_types.h
spinlock.h
stackframe.h
stacktrace.h
stat.h
statfs.h
string.h
suspend.h	MIPS: Add hibernation support	2009-06-17 11:06:31 +01:00
swab.h	MIPS: Define __arch_swab64 for all mips r2 cpus	2009-07-03 15:45:25 +01:00
sysmips.h
system.h	MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC.	2009-09-17 20:07:50 +02:00
termbits.h
termios.h
thread_info.h	KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]	2009-09-02 21:29:19 +10:00
time.h
timex.h
titan_dep.h
tlb.h
tlbdebug.h
tlbflush.h
topology.h
traps.h
txx9irq.h
txx9pio.h
txx9tmr.h
types.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
uaccess.h
ucontext.h
unaligned.h	MIPS: Avoid spurious make includecheck message	2009-09-30 21:47:02 +02:00
unistd.h	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
user.h
vga.h
vpe.h
war.h
watch.h
wbflush.h
xor.h