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3b885787ea
linux_dsm_epyc7002/arch/alpha/include/asm
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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