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
..
atomic.h	asm-generic: rename atomic.h to atomic-long.h	2009-06-11 21:02:17 +02:00
auxvec.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
bitops.h	h8300: define __fls	2009-01-03 16:16:04 +10:30
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
bootinfo.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
bug.h	h8300: GENERIC_BUG support	2008-10-16 11:21:29 -07:00
bugs.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
byteorder.h	byteorder: make swab.h include asm/swab.h like a regular header	2009-01-14 19:56:50 -08:00
cache.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
cachectl.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
cacheflush.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
checksum.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
cputime.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
current.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
dbg.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
delay.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
device.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
div64.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
dma.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
elf.h	[PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY	2008-10-16 15:40:05 +02:00
emergency-restart.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
errno.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
fb.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
fcntl.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
flat.h	flat: fix data sections alignment	2009-05-29 08:40:02 -07:00
fpu.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
ftrace.h	tracing: make CALLER_ADDRx overwriteable	2009-03-02 16:49:37 -05:00
futex.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
gpio.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
hardirq.h	h8300: convert to asm-generic/hardirq.h	2009-09-22 07:17:43 -07:00
hw_irq.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
io.h	h8300: update timer handler - misc update	2008-10-16 11:21:29 -07:00
ioctl.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
ioctls.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
ipcbuf.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
irq.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
irq_regs.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
Kbuild	byteorder: make swab.h include asm/swab.h like a regular header	2009-01-14 19:56:50 -08:00
kdebug.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
kmap_types.h	kmap_types: make most arches use generic header file	2009-06-16 19:47:51 -07:00
linkage.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
local.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
mc146818rtc.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
md.h	asm-h8300/md.h: remove CVS keyword	2008-10-16 11:21:29 -07:00
mman.h	mm: remove duplicate asm/mman.h files	2009-09-22 07:17:42 -07:00
mmu.h	NOMMU: Make VMAs per MM as for MMU-mode linux	2009-01-08 12:04:47 +00:00
mmu_context.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
module.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
msgbuf.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
mutex.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
page.h	asm-generic: rename page.h and uaccess.h	2009-06-11 21:02:17 +02:00
page_offset.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
param.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
pci.h	PCI: remove pcibios_scan_all_fns()	2009-09-09 13:29:18 -07:00
percpu.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
pgalloc.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
pgtable.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
poll.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
posix_types.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
processor.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
ptrace.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
regs267x.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
regs306x.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
resource.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
scatterlist.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
sections.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
segment.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
sembuf.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
setup.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
sh_bios.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
shm.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
shmbuf.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
shmparam.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
sigcontext.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
siginfo.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
smp.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
spinlock.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
stat.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
statfs.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
string.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
swab.h	headers_check fix: h8300, swab.h	2009-02-01 11:01:24 +05:30
system.h	h8300: GENERIC_BUG support	2008-10-16 11:21:29 -07:00
target_time.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
termbits.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
termios.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
thread_info.h	KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]	2009-09-02 21:29:19 +10:00
timer.h	Get rid of final remnants of include/asm-$(ARCH)	2009-04-17 09:59:27 -07:00
timex.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
tlb.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
tlbflush.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
topology.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
traps.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
types.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
uaccess.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
ucontext.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
unaligned.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
unistd.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
user.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00
virtconvert.h	[h8300] move include/asm-h8300 to arch/h8300/include/asm	2008-08-13 14:26:32 -07:00