The following commits have been reverted from this merge, as they are
known to introduce new bugs and are currently incompatible with our
audio implementation. Investigation of these commits is ongoing, and
they are expected to be brought in at a later time:
86e6de7 ALSA: compress: fix drain calls blocking other compress functions (v6)
16442d4 ALSA: compress: fix drain calls blocking other compress functions
This merge commit also includes a change in block, necessary for
compilation. Upstream has modified elevator_init_fn to prevent race
conditions, requring updates to row_init_queue and test_init_queue.
* commit 'v3.10.28': (1964 commits)
Linux 3.10.28
ARM: 7938/1: OMAP4/highbank: Flush L2 cache before disabling
drm/i915: Don't grab crtc mutexes in intel_modeset_gem_init()
serial: amba-pl011: use port lock to guard control register access
mm: Make {,set}page_address() static inline if WANT_PAGE_VIRTUAL
md/raid5: Fix possible confusion when multiple write errors occur.
md/raid10: fix two bugs in handling of known-bad-blocks.
md/raid10: fix bug when raid10 recovery fails to recover a block.
md: fix problem when adding device to read-only array with bitmap.
drm/i915: fix DDI PLLs HW state readout code
nilfs2: fix segctor bug that causes file system corruption
thp: fix copy_page_rep GPF by testing is_huge_zero_pmd once only
ftrace/x86: Load ftrace_ops in parameter not the variable holding it
SELinux: Fix possible NULL pointer dereference in selinux_inode_permission()
writeback: Fix data corruption on NFS
hwmon: (coretemp) Fix truncated name of alarm attributes
vfs: In d_path don't call d_dname on a mount point
staging: comedi: adl_pci9111: fix incorrect irq passed to request_irq()
staging: comedi: addi_apci_1032: fix subdevice type/flags bug
mm/memory-failure.c: recheck PageHuge() after hugetlb page migrate successfully
GFS2: Increase i_writecount during gfs2_setattr_chown
perf/x86/amd/ibs: Fix waking up from S3 for AMD family 10h
perf scripting perl: Fix build error on Fedora 12
ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
Linux 3.10.27
sched: Guarantee new group-entities always have weight
sched: Fix hrtimer_cancel()/rq->lock deadlock
sched: Fix cfs_bandwidth misuse of hrtimer_expires_remaining
sched: Fix race on toggling cfs_bandwidth_used
x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround
netfilter: nf_nat: fix access to uninitialized buffer in IRC NAT helper
SCSI: sd: Reduce buffer size for vpd request
intel_pstate: Add X86_FEATURE_APERFMPERF to cpu match parameters.
mac80211: move "bufferable MMPDU" check to fix AP mode scan
ACPI / Battery: Add a _BIX quirk for NEC LZ750/LS
ACPI / TPM: fix memory leak when walking ACPI namespace
mfd: rtsx_pcr: Disable interrupts before cancelling delayed works
clk: exynos5250: fix sysmmu_mfc{l,r} gate clocks
clk: samsung: exynos5250: Add CLK_IGNORE_UNUSED flag for the sysreg clock
clk: samsung: exynos4: Correct SRC_MFC register
clk: clk-divider: fix divisor > 255 bug
ahci: add PCI ID for Marvell 88SE9170 SATA controller
parisc: Ensure full cache coherency for kmap/kunmap
drm/nouveau/bios: make jump conditional
ARM: shmobile: mackerel: Fix coherent DMA mask
ARM: shmobile: armadillo: Fix coherent DMA mask
ARM: shmobile: kzm9g: Fix coherent DMA mask
ARM: dts: exynos5250: Fix MDMA0 clock number
ARM: fix "bad mode in ... handler" message for undefined instructions
ARM: fix footbridge clockevent device
net: Loosen constraints for recalculating checksum in skb_segment()
bridge: use spin_lock_bh() in br_multicast_set_hash_max
netpoll: Fix missing TXQ unlock and and OOPS.
net: llc: fix use after free in llc_ui_recvmsg
virtio-net: fix refill races during restore
virtio_net: don't leak memory or block when too many frags
virtio-net: make all RX paths handle errors consistently
virtio_net: fix error handling for mergeable buffers
vlan: Fix header ops passthru when doing TX VLAN offload.
net: rose: restore old recvmsg behavior
rds: prevent dereference of a NULL device
ipv6: always set the new created dst's from in ip6_rt_copy
net: fec: fix potential use after free
hamradio/yam: fix info leak in ioctl
drivers/net/hamradio: Integer overflow in hdlcdrv_ioctl()
net: inet_diag: zero out uninitialized idiag_{src,dst} fields
ip_gre: fix msg_name parsing for recvfrom/recvmsg
net: unix: allow bind to fail on mutex lock
ipv6: fix illegal mac_header comparison on 32bit
netvsc: don't flush peers notifying work during setting mtu
tg3: Initialize REG_BASE_ADDR at PCI config offset 120 to 0
net: unix: allow set_peek_off to fail
net: drop_monitor: fix the value of maxattr
ipv6: don't count addrconf generated routes against gc limit
packet: fix send path when running with proto == 0
virtio: delete napi structures from netdev before releasing memory
macvtap: signal truncated packets
tun: update file current position
macvtap: update file current position
macvtap: Do not double-count received packets
rds: prevent BUG_ON triggered on congestion update to loopback
net: do not pretend FRAGLIST support
IPv6: Fixed support for blackhole and prohibit routes
HID: Revert "Revert "HID: Fix logitech-dj: missing Unifying device issue""
gpio-rcar: R-Car GPIO IRQ share interrupt
clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcast
irqchip: renesas-irqc: Fix irqc_probe error handling
Linux 3.10.26
sh: add EXPORT_SYMBOL(min_low_pfn) and EXPORT_SYMBOL(max_low_pfn) to sh_ksyms_32.c
ext4: fix bigalloc regression
arm64: Use Normal NonCacheable memory for writecombine
arm64: Do not flush the D-cache for anonymous pages
arm64: Avoid cache flushing in flush_dcache_page()
ARM: KVM: arch_timers: zero CNTVOFF upon return to host
ARM: hyp: initialize CNTVOFF to zero
clocksource: arch_timer: use virtual counters
arm64: Remove unused cpu_name ascii in arch/arm64/mm/proc.S
arm64: dts: Reserve the memory used for secondary CPU release address
arm64: check for number of arguments in syscall_get/set_arguments()
arm64: fix possible invalid FPSIMD initialization state
...
Change-Id: Ia0e5d71b536ab49ec3a1179d59238c05bdd03106
Signed-off-by: Ian Maund <imaund@codeaurora.org>
[ Upstream commit 66e56cd46b93ef407c60adcac62cf33b06119d50 ]
Commit e40526cb20b5 introduced a cached dev pointer, that gets
hooked into register_prot_hook(), __unregister_prot_hook() to
update the device used for the send path.
We need to fix this up, as otherwise this will not work with
sockets created with protocol = 0, plus with sll_protocol = 0
passed via sockaddr_ll when doing the bind.
So instead, assign the pointer directly. The compiler can inline
these helper functions automagically.
While at it, also assume the cached dev fast-path as likely(),
and document this variant of socket creation as it seems it is
not widely used (seems not even the author of TX_RING was aware
of that in his reference example [1]). Tested with reproducer
from e40526cb20b5.
[1] http://wiki.ipxwarzone.com/index.php5?title=Linux_packet_mmap#Example
Fixes: e40526cb20b5 ("packet: fix use after free race in send path when dev is released")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Tested-by: Salam Noureddine <noureddine@aristanetworks.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 98e09386c0ef4dfd48af7ba60ff908f0d525cdee ]
After commit c9eeec26e32e ("tcp: TSQ can use a dynamic limit"), several
users reported throughput regressions, notably on mvneta and wifi
adapters.
802.11 AMPDU requires a fair amount of queueing to be effective.
This patch partially reverts the change done in tcp_write_xmit()
so that the minimal amount is sysctl_tcp_limit_output_bytes.
It also remove the use of this sysctl while building skb stored
in write queue, as TSO autosizing does the right thing anyway.
Users with well behaving NICS and correct qdisc (like sch_fq),
can then lower the default sysctl_tcp_limit_output_bytes value from
128KB to 8KB.
This new usage of sysctl_tcp_limit_output_bytes permits each driver
authors to check how their driver performs when/if the value is set
to a minimum of 4KB.
Normally, line rate for a single TCP flow should be possible,
but some drivers rely on timers to perform TX completion and
too long TX completion delays prevent reaching full throughput.
Fixes: c9eeec26e32e ("tcp: TSQ can use a dynamic limit")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Sujith Manoharan <sujith@msujith.org>
Reported-by: Arnaud Ebalard <arno@natisbad.org>
Tested-by: Sujith Manoharan <sujith@msujith.org>
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commits 6d36824e730f247b602c90e8715a792003e3c5a7,
02cf4ebd82ff0ac7254b88e466820a290ed8289a, and parts of
7eec4174ff29cd42f2acfae8112f51c228545d40 ]
After hearing many people over past years complaining against TSO being
bursty or even buggy, we are proud to present automatic sizing of TSO
packets.
One part of the problem is that tcp_tso_should_defer() uses an heuristic
relying on upcoming ACKS instead of a timer, but more generally, having
big TSO packets makes little sense for low rates, as it tends to create
micro bursts on the network, and general consensus is to reduce the
buffering amount.
This patch introduces a per socket sk_pacing_rate, that approximates
the current sending rate, and allows us to size the TSO packets so
that we try to send one packet every ms.
This field could be set by other transports.
Patch has no impact for high speed flows, where having large TSO packets
makes sense to reach line rate.
For other flows, this helps better packet scheduling and ACK clocking.
This patch increases performance of TCP flows in lossy environments.
A new sysctl (tcp_min_tso_segs) is added, to specify the
minimal size of a TSO packet (default being 2).
A follow-up patch will provide a new packet scheduler (FQ), using
sk_pacing_rate as an input to perform optional per flow pacing.
This explains why we chose to set sk_pacing_rate to twice the current
rate, allowing 'slow start' ramp up.
sk_pacing_rate = 2 * cwnd * mss / srtt
v2: Neal Cardwell reported a suspect deferring of last two segments on
initial write of 10 MSS, I had to change tcp_tso_should_defer() to take
into account tp->xmit_size_goal_segs
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Van Jacobson <vanj@google.com>
Cc: Tom Herbert <therbert@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This new mode allows Neighbor discovery packets to be sent to userspace
without regards to the state of the forwarding setting. Without this, NDP
packets addressed to the host are still received, but those for other
addresses are not.
Enabling this mode allows NDP proxying to be performed from userspace.
Change-Id: I69b7a7c0c42e3253c42d6f2e163c0ce1d848aed6
Signed-off-by: Jaime Lopez <jaimel@codeaurora.org>
Added new procfs flag to toggle the automatic addition of prefix
routes on a per device basis. The new flag is accept_ra_prefix_route.
Defaults to 1 as to not break existing behavior.
Change-Id: If25493890c7531c27f5b2c4855afebbbbf5d072a
CRs-Fixed: 435320
Acked-by: Harout S. Hedeshian <harouth@qti.qualcomm.com>
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>
syncookies is on for default since in commit e994b7c901
(tcp: Don't make syn cookies initial setting depend on CONFIG_SYSCTL).
And fix a typo of CONFIG_SYN_COOKIES.
Signed-off-by: Shan Wei <davidshan@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bring the timestamping section in sync with the implementation.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch reviews the driver documentation file;
for example, there were some new fields (in the driver
module parameter section) and the ptp files were
not documented.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Check for NULL before calling the following operations from "struct
ieee802154_mlme_ops": assoc_req, assoc_resp, disassoc_req, start_req,
and scan_req.
This fixes a current oops where those functions are called but not
implemented. It also updates the documentation to clarify that they
are now optional by design. If a call to an unimplemented function
is attempted, the kernel returns EOPNOTSUPP via netlink.
The following operations are still required: get_phy, get_pan_id,
get_short_addr, and get_dsn.
Note that the places where this patch changes the initialization
of "ret" should not affect the rest of the code since "ret" was
always set (again) before returning its value.
Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Lost in space for a long time, but it finally came back to us from
some ancient code tombs. This patch adds a minimal runnable example
of Linux' packet mmap(2) from Chetan Loke's TPACKET_V3. Special
thanks to David S. Miller, and also Eric Leblond and Victor Julien!
Cc: Eric Leblond <eric@regit.org>
Cc: Victor Julien <victor@inliniac.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch updates the stmmac.txt file adding information related to the PTP
and SGMII/RGMII supports.
Also the patch updates the driver version to: March_2013.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch implements F-RTO (foward RTO recovery):
When the first retransmission after timeout is acknowledged, F-RTO
sends new data instead of old data. If the next ACK acknowledges
some never-retransmitted data, then the timeout was spurious and the
congestion state is reverted. Otherwise if the next ACK selectively
acknowledges the new data, then the timeout was genuine and the
loss recovery continues. This idea applies to recurring timeouts
as well. While F-RTO sends different data during timeout recovery,
it does not (and should not) change the congestion control.
The implementaion follows the three steps of SACK enhanced algorithm
(section 3) in RFC5682. Step 1 is in tcp_enter_loss(). Step 2 and
3 are in tcp_process_loss(). The basic version is not supported
because SACK enhanced version also works for non-SACK connections.
The new implementation is functionally in parity with the old F-RTO
implementation except the one case where it increases undo events:
In addition to the RFC algorithm, a spurious timeout may be detected
without sending data in step 2, as long as the SACK confirms not
all the original data are dropped. When this happens, the sender
will undo the cwnd and perhaps enter fast recovery instead. This
additional check increases the F-RTO undo events by 5x compared
to the prior implementation on Google Web servers, since the sender
often does not have new data to send for HTTP.
Note F-RTO may detect spurious timeout before Eifel with timestamps
does so.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The patch series refactor the F-RTO feature (RFC4138/5682).
This is to simplify the loss recovery processing. Existing F-RTO
was developed during the experimental stage (RFC4138) and has
many experimental features. It takes a separate code path from
the traditional timeout processing by overloading CA_Disorder
instead of using CA_Loss state. This complicates CA_Disorder state
handling because it's also used for handling dubious ACKs and undos.
While the algorithm in the RFC does not change the congestion control,
the implementation intercepts congestion control in various places
(e.g., frto_cwnd in tcp_ack()).
The new code implements newer F-RTO RFC5682 using CA_Loss processing
path. F-RTO becomes a small extension in the timeout processing
and interfaces with congestion control and Eifel undo modules.
It lets congestion control (module) determines how many to send
independently. F-RTO only chooses what to send in order to detect
spurious retranmission. If timeout is found spurious it invokes
existing Eifel undo algorithms like DSACK or TCP timestamp based
detection.
The first patch removes all F-RTO code except the sysctl_tcp_frto is
left for the new implementation. Since CA_EVENT_FRTO is removed, TCP
westwood now computes ssthresh on regular timeout CA_EVENT_LOSS event.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dmitry Akindinov is reporting for a problem where SYNs are looping
between the master and backup server when the backup server is used as
real server in DR mode and has IPVS rules to function as director.
Even when the backup function is enabled we continue to forward
traffic and schedule new connections when the current master is using
the backup server as real server. While this is not a problem for NAT,
for DR and TUN method the backup server can not determine if a request
comes from client or from director.
To avoid such loops add new sysctl flag backup_only. It can be needed
for DR/TUN setups that do not need backup and director function at the
same time. When the backup function is enabled we stop any forwarding
and pass the traffic to the local stack (real server mode). The flag
disables the director function when the backup function is enabled.
For setups that enable backup function for some virtual services and
director function for other virtual services there should be another
more complex solution to support DR/TUN mode, may be to assign
per-virtual service syncid value, so that we can differentiate the
requests.
Reported-by: Dmitry Akindinov <dimak@stalker.com>
Tested-by: German Myzovsky <lawyer@sipnet.ru>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
TCPCT uses option-number 253, reserved for experimental use and should
not be used in production environments.
Further, TCPCT does not fully implement RFC 6013.
As a nice side-effect, removing TCPCT increases TCP's performance for
very short flows:
Doing an apache-benchmark with -c 100 -n 100000, sending HTTP-requests
for files of 1KB size.
before this patch:
average (among 7 runs) of 20845.5 Requests/Second
after:
average (among 7 runs) of 21403.6 Requests/Second
Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
The default value is 128, not 256
#grep gc_thresh1 net/ -rI
net/decnet/dn_neigh.c: .gc_thresh1 = 128,
net/ipv6/ndisc.c: .gc_thresh1 = 128,
net/ipv4/arp.c: .gc_thresh1 = 128,
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch series implement the Tail loss probe (TLP) algorithm described
in http://tools.ietf.org/html/draft-dukkipati-tcpm-tcp-loss-probe-01. The
first patch implements the basic algorithm.
TLP's goal is to reduce tail latency of short transactions. It achieves
this by converting retransmission timeouts (RTOs) occuring due
to tail losses (losses at end of transactions) into fast recovery.
TLP transmits one packet in two round-trips when a connection is in
Open state and isn't receiving any ACKs. The transmitted packet, aka
loss probe, can be either new or a retransmission. When there is tail
loss, the ACK from a loss probe triggers FACK/early-retransmit based
fast recovery, thus avoiding a costly RTO. In the absence of loss,
there is no change in the connection state.
PTO stands for probe timeout. It is a timer event indicating
that an ACK is overdue and triggers a loss probe packet. The PTO value
is set to max(2*SRTT, 10ms) and is adjusted to account for delayed
ACK timer when there is only one oustanding packet.
TLP Algorithm
On transmission of new data in Open state:
-> packets_out > 1: schedule PTO in max(2*SRTT, 10ms).
-> packets_out == 1: schedule PTO in max(2*RTT, 1.5*RTT + 200ms)
-> PTO = min(PTO, RTO)
Conditions for scheduling PTO:
-> Connection is in Open state.
-> Connection is either cwnd limited or no new data to send.
-> Number of probes per tail loss episode is limited to one.
-> Connection is SACK enabled.
When PTO fires:
new_segment_exists:
-> transmit new segment.
-> packets_out++. cwnd remains same.
no_new_packet:
-> retransmit the last segment.
Its ACK triggers FACK or early retransmit based recovery.
ACK path:
-> rearm RTO at start of ACK processing.
-> reschedule PTO if need be.
In addition, the patch includes a small variation to the Early Retransmit
(ER) algorithm, such that ER and TLP together can in principle recover any
N-degree of tail loss through fast recovery. TLP is controlled by the same
sysctl as ER, tcp_early_retrans sysctl.
tcp_early_retrans==0; disables TLP and ER.
==1; enables RFC5827 ER.
==2; delayed ER.
==3; TLP and delayed ER. [DEFAULT]
==4; TLP only.
The TLP patch series have been extensively tested on Google Web servers.
It is most effective for short Web trasactions, where it reduced RTOs by 15%
and improved HTTP response time (average by 6%, 99th percentile by 10%).
The transmitted probes account for <0.5% of the overall transmissions.
Signed-off-by: Nandita Dukkipati <nanditad@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
TCP Appropriate Byte Count was added by me, but later disabled.
There is no point in maintaining it since it is a potential source
of bugs and Linux already implements other better window protection
heuristics.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
We recently refactored the driver source, this patch will take care of
updating copyright date and adding it to newly added files.
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
This batch contains netfilter updates for you net-next tree, they are:
* The new connlabel extension for x_tables, that allows us to attach
labels to each conntrack flow. The kernel implementation uses a
bitmask and there's a file in user-space that maps the bits with the
corresponding string for each existing label. By now, you can attach
up to 128 overlapping labels. From Florian Westphal.
* A new round of improvements for the netns support for conntrack.
Gao feng has moved many of the initialization code of each module
of the netns init path. He also made several code refactoring, that
code looks cleaner to me now.
* Added documentation for all possible tweaks for nf_conntrack via
sysctl, from Jiri Pirko.
* Cisco 7941/7945 IP phone support for our SIP conntrack helper,
from Kevin Cernekee.
* Missing header file in the snmp helper, from Stephen Hemminger.
* Finally, a couple of fixes to resolve minor issues with these
changes, from myself.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Gortmaker says:
====================
The Ethernet-HowTo was maintained for roughly 10 years, from 1993 to 2003.
Fortunately sane hardware probing and auto detection (via PCI and ISA/PnP)
largely made the document a relic of the past, hence it being abandoned
a decade ago.
However, there is one last useful thing that we can extract from the
effort made in maintaining that document. We can use it to guide us
with respect to what rare, experimental and/or super ancient 10Mbit
ISA drivers don't make sense to maintain in-tree anymore.
Nobody will argue that ISA is obsolete. Availability went away at about
the time Pentium3 motherboards moved from 500MHz Slot1/SECC processors
to the green 500MHz Socket 370 Pentium3 chips, at the turn of the century.
In theory, it is possible that someone could still be running one of these
12+ year old P3 machines and want 3.9+ bleeding edge kernels (but unlikely).
In light of the above (remote) possibility, we can defer the removal of some
ISA network drivers that were highly popular and well tested. Typically
that means the stuff more from the mid to late '90s, some with ISA PnP
support, like the 3c509, the wd/SMC 8390 based stuff, PCnet/lance etc.
But a lot of other drivers, typically from the early 1990s were for rare
hardware, and experimental (to the point of requiring a cron job that would
do a test ping, and then ifconfig down/up and/or a rmmod/insmod!). And
some of these drivers (znet, and lp486e to name two) are physically tied
to platforms with on motherboard ethernet -- of 486 machines that date
from the early 1990s and can only have single digit amounts of memory.
What I'd like to achieve here with this series, is to get rid of those old
drivers that are no longer being used. In an earlier discussion where
I'd proposed deleting a single driver, Alan suggested we instead dump
all the historical stuff in one go, to make it "...immediately obvious
where the break point is..."[1] and that it was "perfectly reasonable it
(and a pile of other ISA cards) ought to be shown the door"[2]. So that
is the goal here - make a clear line in the sand where the really ancient
stuff finally gets kicked to the curb.
Two old parallel port drivers are considered for removal here as well,
since in early 386/486 ISA machines, the parallel port was typically found
with the UARTS on the multi-I/O ISA controller card. These drivers also date
from the early 1990's; parallel ports are no longer found on modern boards,
and their performance was not even capable of 10% of 10Mbit bandwidth.
Allow me a preemptive justification against the inevitable comments from
well meaning bystanders who suggest "why not just leave all this alone?".
Dead drivers cost us all if they are left in tree. If you think that
is false, then please first consider:
-every time you type "git status", you are checking to see if modifications
have been made by you to all that dead code.
-every time you type "git grep <regex>" you are searching through files
which contain that dead code that simply does not interest you.
-every time you build a "allyesconfig" and an "allmodconfig" (don't tell
me you skip this step before submitting your changes to a maintainer),
you waste CPU cycles building this dead code.
-every time there is a tree wide API change, or cleanup, or file relocation,
we pay the cost of updating dead code, or moving dead code.
-daily regression tests (take linux-next as the most transparent
example) spend time building (and possibly running) this dead code.
-hard working people who regularly run auditing tools looking for lurking
bugs (sparse/coverity/smatch/coccinelle) are wasting time checking for,
and fixing bugs in this dead code.
This last one is key. Please take a look at the git history for the
files that are proposed for removal here. Look at the git history for
any one of them ("git whatchanged --follow drivers/net/.../driver.c")
Mentally sort the changes into two bins -- (1) the robotic tree-wide
changes, and (2) the "look I found a real run-time bug while using this"
category. You will see that category #2 is essentially empty.
Further to that, realize that drivers don't simply disappear. We are
not operating in the binary-only distribution space like other OS. All
these drivers remain in the git history forever. If a person is an
enthusiast for extreme legacy hardware, they are probably already
customizing their kernel source and building it themselves to support
such systems. Also keep in mind that they could still build the 3.8
kernel exactly as-is, and run it (or a 3.8.x stable variant of it) for
several more years if they were really determined to cling to these old
experimental ISA drivers for some reason.
In summary, I hope that folks can be pragmatic about this, and not
get swept up in nostalgia. Ask yourself whether it is realistic to
expect a person would have a genuine use case where they would
need to build a 3.9+ modern kernel and install it on some legacy hardware
that has no option but to absolutely _require_ one of the drivers
that are deleted here.
The following series was created with --irreversible-delete for
ease of review (it skips showing the content of files that are
deleted); however the complete patches can be pulled as per below.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Since we have removed NCE (Neighbour Cache Entry) reference from
routing entries, the only refcnt holders of an NCE are its timer
(if running) and its owner table, in usual cases. As a result,
neigh_periodic_work() purges NCEs over and over again even for
gateways.
It does not make sense to purge entries, if number of them is
very small, so keep them. The minimum number of entries to keep
is specified by gc_thresh1.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This is another one that makes sense to target for obsolescence, since
it (a)appeared pre-1995, and (b)was rather rare, and (c)did not
really have any statistically significant active linux user base.
Removing this ISA 10Mbit driver support is unlikely to be even noticed
by the user base of 3.9+ linux kernels, especially when the documentation
clearly indicates the vintage with this text:
"...designed to work with all kernels > 1.1.33"
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
These are old ISA 10Mbit cards from the 1st 1/2 of the 1990s and
required manual jumper settings in order to configure them. Here
we remove them on the premise that they are no longer used in any
modern 3.9+ kernels.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
The parallel port is largely replaced by USB, and even in the
day where these drivers were current, the documented speed was
less than 100kB/s. Let us not pretend that anyone cares about
these drivers anymore, or worse - pretend that anyone is using
them on a modern kernel.
As a side bonus, this is the end of legacy parallel port ethernet,
so we get to drop the whole chunk relating to that in the legacy
Space.c file containing the non-PCI unified probe dispatch.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
The original intent of this file was to list limitations in
drivers/hardware relating to multicast use, back when some
modest hardware from the early 1990s did not support things
we might take for granted today.
I was intending to delete some now-gone MCA/token ring entries
in this file, but once I opened it, I found it only contained
information on the earliest (pre-2000) linux networking drivers.
Checking the git history shows that the file hasn't been touched
since 2005. Clearly nobody is actively consulting this file
as a meaningful reference.
Rather than add a "YES YES YES" line for all of the drivers we
currently have, lets just take advantage of the fact that nobody
is using the file to delete it.
This has the side benefit of not having to do a line-by-line
deletion of the file content as each older driver is expired.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I grepped through the code and picked bits about nf_conntrack sysctl api
and put that into one documentation file.
[ I have mangled this patch including comments from several grammar
improvements proposed by Neal Murphy <neal.p.murphy@alum.wpi.edu>,
any new grammar error is my mistake --pablo ]
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
While a privileged program can open a raw socket, attach some
restrictive filter and drop its privileges (or send the socket to an
unprivileged program through some Unix socket), the filter can still
be removed or modified by the unprivileged program. This commit adds a
socket option to lock the filter (SO_LOCK_FILTER) preventing any
modification of a socket filter program.
This is similar to OpenBSD BIOCLOCK ioctl on bpf sockets, except even
root is not allowed change/drop the filter.
The state of the lock can be read with getsockopt(). No error is
triggered if the state is not changed. -EPERM is returned when a user
tries to remove the lock or to change/remove the filter while the lock
is active. The check is done directly in sk_attach_filter() and
sk_detach_filter() and does not affect only setsockopt() syscall.
Signed-off-by: Vincent Bernat <bernat@luffy.cx>
Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts:
Documentation/networking/ip-sysctl.txt
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
Both conflicts were simply overlapping context.
A build fix for qlcnic is in here too, simply removing the added
devinit annotations which no longer exist.
Signed-off-by: David S. Miller <davem@davemloft.net>
The flags argument of the phy_{attach,connect,connect_direct} functions
is then used to assign a struct phy_device dev_flags with its value.
All callers but the tg3 driver pass the flag 0, which results in the
underlying PHY drivers in drivers/net/phy/ not being able to actually
use any of the flags they would set in dev_flags. This patch gets rid of
the flags argument, and passes phydev->dev_flags to the internal PHY
library call phy_attach_direct() such that drivers which actually modify
a phy device dev_flags get the value preserved for use by the underlying
phy driver.
Acked-by: Kosta Zertsekel <konszert@marvell.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Output of a git grep happened to make me look into this file, and
I found instructions about how to hand patch (without using patch)
the driver into the kernel tree.
Since the driver has been a part of the mainline kernel for years,
we can dump this whole section. Fortunately it doesn't even cause
a renumbering of the sections to do so.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Recent commit (commit 7e3a2dc529 doc: make the description of how tcp_ecn
works more explicit and clear ) clarified the behavior of tcp_ecn sysctl
variable but description is inconsistent. When requested by incoming conections,
ECN is enabled with not just tcp_ecn = 2 but also with tcp_ecn = 1.
This patch makes it clear that with tcp_ecn = 1, ECN is enabled when requested
by incoming connections.
Also fix spelling of 'incoming'.
Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Update the netconsole document as well.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I slipped in a new sysctl without proper documentation. I would like to
make up for this now.
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The description for tcp_fin_timeout should be tigher and more clear.
In addition to being tighter, we should make the spelling of the
state name consistent with what utilities report, remove the now
dated reference to 2.2 and put the default in the consistent place.
Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
'secluded' is used to describe places, not suitable here.
Suggested-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Shan Wei <davidshan@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make the description of how tcp_ecn works a bit more explicit and clear.
Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch updates the stmmac.txt adding some information
about the new rx/tx mitigation schema adopted in the driver.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts:
drivers/net/wireless/iwlwifi/pcie/tx.c
Minor iwlwifi conflict in TX queue disabling between 'net', which
removed a bogus warning, and 'net-next' which added some status
register poking code.
Signed-off-by: David S. Miller <davem@davemloft.net>
Some commands don't work in its example doc. The patch will fix it.
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
