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
..
8253pit.h	time: move PIT_TICK_RATE to linux/timex.h	2009-06-16 19:47:27 -07:00
a.out-core.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
a.out.h	alpha: introduce field 'taso' into struct linux_binprm	2008-10-16 11:21:38 -07:00
agp_backend.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
agp.h	agp: kill phys_to_gart() and gart_to_phys()	2009-08-03 09:05:00 +01:00
atomic.h	asm-generic: rename atomic.h to atomic-long.h	2009-06-11 21:02:17 +02:00
auxvec.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
barrier.h	alpha: futex implementation	2009-05-02 15:36:10 -07:00
bitops.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
bitsperlong.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
bug.h	alpha: fixup BUG macro	2009-02-05 12:56:49 -08:00
bugs.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -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	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
cacheflush.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
checksum.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
compiler.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
console.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_apecs.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_cia.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_irongate.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_lca.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_marvel.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_mcpcia.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_polaris.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_t2.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_titan.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_tsunami.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
core_wildfire.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
cputime.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
current.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
delay.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
device.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
div64.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
dma-mapping.h	alpha: compile fixes	2009-01-29 18:04:44 -08:00
dma.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
elf.h	[PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY	2008-10-16 15:40:05 +02:00
emergency-restart.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
err_common.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
err_ev6.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
err_ev7.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
errno.h	cfg80211: errno.h: define ERFKILL	2009-06-07 05:01:00 -07:00
fb.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
fcntl.h	fcntl: add F_[SG]ETOWN_EX	2009-09-24 07:21:01 -07:00
floppy.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
fpu.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
ftrace.h	tracing: make CALLER_ADDRx overwriteable	2009-03-02 16:49:37 -05:00
futex.h	alpha: futex implementation	2009-05-02 15:36:10 -07:00
gct.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
gentrap.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
hardirq.h	alpha: convert to asm-generic/hardirq.h	2009-09-22 07:17:43 -07:00
hw_irq.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
hwrpb.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
io_trivial.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
io.h	alpha: remove dead BIO_VMERGE_BOUNDARY	2008-12-29 08:29:51 +01:00
ioctl.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
ioctls.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
ipcbuf.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
irq_regs.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
irq.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
jensen.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -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	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
kmap_types.h	kmap_types: make most arches use generic header file	2009-06-16 19:47:51 -07:00
linkage.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
local.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
machvec.h	alpha: convert u64 to unsigned long long	2009-04-01 08:59:16 -07:00
mc146818rtc.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
md.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
mman.h	mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions	2009-09-22 07:17:41 -07:00
mmu_context.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
mmu.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
mmzone.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
module.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
msgbuf.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
mutex.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
page.h	asm-generic: rename page.h and uaccess.h	2009-06-11 21:02:17 +02:00
pal.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
param.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
parport.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
pci.h	PCI: remove pcibios_scan_all_fns()	2009-09-09 13:29:18 -07:00
percpu.h	alpha: fix percpu build breakage	2009-06-30 18:55:59 -07:00
pgalloc.h	alpha: make pte_alloc_one_kernel() inline	2009-01-15 16:39:40 -08:00
pgtable.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
poll.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
posix_types.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
processor.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
ptrace.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
reg.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
regdef.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
resource.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
rtc.h	alpha: fix RTC on marvel	2009-01-15 16:39:40 -08:00
rwsem.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
scatterlist.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
sections.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
segment.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
sembuf.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
serial.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
setup.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
sfp-machine.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
shmbuf.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
shmparam.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
sigcontext.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
siginfo.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
signal.h	asm-generic: rename termios.h, signal.h and mman.h	2009-06-11 21:01:52 +02:00
smp.h	cpumask: remove arch_send_call_function_ipi	2009-09-24 09:34:47 +09:30
socket.h	net: Generalize socket rx gap / receive queue overflow cmsg	2009-10-12 13:26:31 -07:00
sockios.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
spinlock_types.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
spinlock.h	Allow rwlocks to re-enable interrupts	2009-04-02 19:05:11 -07:00
stat.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
statfs.h	headers_check fix: alpha, statfs.h	2009-02-01 11:01:22 +05:30
string.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
swab.h	headers_check fix: alpha, swab.h	2009-02-01 11:01:22 +05:30
sysinfo.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
system.h	alpha: xchg/cmpxchg cleanup and fixes	2009-04-01 08:59:16 -07:00
termbits.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
termios.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
thread_info.h	KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]	2009-09-02 21:29:19 +10:00
timex.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
tlb.h	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
tlbflush.h	alpha: switch to dynamic percpu allocator	2009-06-24 15:13:52 +09:00
topology.h	cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node	2009-09-24 09:34:34 +09:30
types.h	asm-generic: introduce asm/bitsperlong.h	2009-06-11 21:02:14 +02:00
uaccess.h	alpha: exception table sorting	2009-05-02 15:36:10 -07:00
ucontext.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
unaligned.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
unistd.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
user.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
vga.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00
xchg.h	alpha: xchg/cmpxchg cleanup and fixes	2009-04-01 08:59:16 -07:00
xor.h	alpha: move include/asm-alpha to arch/alpha/include/asm	2008-08-15 09:19:40 -07:00