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2017-11-13ceph: silence sparse endianness warning in encode_caps_cbJeff Layton
sparse warns: fs/ceph/mds_client.c:2887:34: warning: incorrect type in assignment (different base types) fs/ceph/mds_client.c:2887:34: expected restricted __le32 [assigned] [usertype] flock_len fs/ceph/mds_client.c:2887:34: got int At this point, it's just being used as a flag. It gets overwritten later if the rest of the encoding succeeds. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: remove the bump of i_versionJeff Layton
Eventually, we'll want to wire cephfs up to use the change attribute that the cluster tracks instead, but for now this is unneeded. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: present consistent fsid, regardless of arch endiannessJeff Layton
Since its inception, ceph has presented the fsid as an opaque value without any sort of endianness conversion. This means that the value presented is different on architectures of different endianness. While the value that should be stuffed into f_fsid is poorly-defined, I think it would be best to strive for consistency here between architectures, and clients (we need to present this properly to the userland client as well). Change ceph_statfs to convert the opaque words to host-endian before doing the xor. On an upgrade, a big-endian box may see a different fsid than it did before, but little-endian arches should see no change with this patch. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: clean up spinlocking and list handling around cleanup_cap_releases()Jeff Layton
Functions that release a lock taken in a parent frame are notoriously hard to follow. Split cleanup_cap_releases into two functions, one to detach the cap releases from the session (which should be called with the spinlock held), and another to dispose of those caps. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13rbd: get rid of rbd_mapping::read_onlyIlya Dryomov
It is redundant -- rw/ro state is stored in hd_struct and managed by the block layer. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13rbd: fix and simplify rbd_ioctl_set_ro()Ilya Dryomov
->open_count/-EBUSY check is bogus and wrong: when an open device is set read-only, blkdev_write_iter() refuses further writes with -EPERM. This is standard behaviour and all other block devices allow this. set_disk_ro() call is also problematic: we affect the entire device when called on a single partition. All rbd_ioctl_set_ro() needs to do is refuse ro -> rw transition for mapped snapshots. Everything else can be handled by generic code. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: remove unused and redundant variable droppingColin Ian King
Variable dropping is set but never read and hence is redundant and can be removed. Cleans up clang warning: fs/ceph/caps.c:1170:2: warning: Value stored to 'dropping' is never read Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: mark expected switch fall-throughsGustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> [idryomov@gmail.com: amended "Older OSDs" comment] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: -EINVAL on decoding failure in ceph_mdsc_handle_fsmap()Ilya Dryomov
Don't set ->mdsmap_err to -ENOENT unconditionally, and drop unneeded return statement while at it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: disable cached readdir after dropping positive dentryYan, Zheng
Ideally CEPH_CAP_FILE_SHARED should have been revoked before postive dentry get dropped. But if something goes wrong, later cached readdir may dereference the dropped dentry. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: fix bool initialization/comparisonThomas Meyer
Bool initializations should use true and false. Bool tests don't need comparisons. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: handle 'session get evicted while there are file locks'Yan, Zheng
When session get evicted, all file locks associated with the session get released remotely by mds. File locks tracked by kernel become stale. In this situation, set an error flag on inode. The flag makes further file locks return -EIO. Another option to handle this situation is cleanup file locks tracked kernel. I do not choose it because it is inconvenient to notify user program about the error. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: optimize flock encoding during reconnectYan, Zheng
Don't malloc if there is no flock. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: make lock_to_ceph_filelock() staticYan, Zheng
Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13ceph: keep auth cap when inode has flocks or posix locksYan, Zheng
file locks are tracked by inode's auth mds. dropping auth caps is equivalent to releasing all file locks. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2017-11-13power: supply: cpcap-charger: fix incorrect return value checkPan Bian
Function platform_get_irq_byname() returns a negative error code on failure, and a zero or positive number on success. However, in function cpcap_usb_init_irq(), positive IRQ numbers are also taken as error cases. Use "if (irq < 0)" instead of "if (!irq)" to validate the return value of platform_get_irq_byname(). Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
2017-11-13gpio: tegra186: Remove tegra186_gpio_lock_classAxel Lin
This is no longer required after commit 959bc7b22bd2 ("gpio: Automatically add lockdep keys") Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-13quota: be aware of error from dquot_initializeChao Yu
Commit 6184fc0b8dd7 ("quota: Propagate error from ->acquire_dquot()") missed to handle error from dquot_initialize in dquot_file_open, fix it. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jan Kara <jack@suse.cz>
2017-11-13cpu/hotplug: Get rid of CPU hotplug notifier leftoversThomas Gleixner
The CPU hotplug notifiers are history. Remove the last reminders. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-11-13kprobes: Don't spam the build log with deprecation warningsIngo Molnar
The jprobes APIs are deprecated - but are still in occasional use for code that few people seem to care about, so stop generating deprecation warnings. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-11-12/proc/module: use the same logic as /proc/kallsyms for address exposureLinus Torvalds
The (alleged) users of the module addresses are the same: kernel profiling. So just expose the same helper and format macros, and unify the logic. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-13drm/rockchip: analogix_dp: Use mutex rather than spinlockEmil Renner Berthing
On the Samsung Chromebook Plus I get this error with 4.14-rc3: BUG: scheduling while atomic: kworker/3:1/50/0x00000002 Modules linked in: CPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 4.14.0-0.rc3-kevin #2 Hardware name: Google Kevin (DT) Workqueue: events analogix_dp_psr_work Call trace: [<ffffff80080873b0>] dump_backtrace+0x0/0x320 [<ffffff80080876e4>] show_stack+0x14/0x20 [<ffffff8008606d38>] dump_stack+0x9c/0xbc [<ffffff80080c6b5c>] __schedule_bug+0x4c/0x70 [<ffffff80086188c0>] __schedule+0x3f0/0x458 [<ffffff8008618960>] schedule+0x38/0xa0 [<ffffff800861c20c>] schedule_hrtimeout_range_clock+0x84/0xe8 [<ffffff800861c2a0>] schedule_hrtimeout_range+0x10/0x18 [<ffffff800861bcec>] usleep_range+0x64/0x78 [<ffffff8008415a6c>] analogix_dp_transfer+0x16c/0x340 [<ffffff8008412550>] analogix_dpaux_transfer+0x10/0x18 [<ffffff80083ceb14>] drm_dp_dpcd_access+0x4c/0xf0 [<ffffff80083cf614>] drm_dp_dpcd_write+0x1c/0x28 [<ffffff8008413b98>] analogix_dp_disable_psr+0x60/0xa8 [<ffffff800840da3c>] analogix_dp_psr_work+0x4c/0x90 [<ffffff80080bb09c>] process_one_work+0x1d4/0x348 [<ffffff80080bb258>] worker_thread+0x48/0x478 [<ffffff80080c11fc>] kthread+0x12c/0x130 [<ffffff8008084290>] ret_from_fork+0x10/0x18 Changing rockchip_dp_device::psr_lock to a mutex rather than spinlock seems to fix the issue. Signed-off-by: Emil Renner Berthing <kernel@esmil.dk> Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Mark Yao <mark.yao@rock-chips.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171004175346.11956-1-kernel@esmil.dk
2017-11-13Merge branch 'net-improve-the-process-of-redirect-and-toobig-for-ipv6-tunnels'David S. Miller
Xin Long says: ==================== net: improve the process of redirect and toobig for ipv6 tunnels Now let's say there are 3 kinds of icmp packets to process for tunnels, toobig(needfrag), redirect, others, their process should be: - toobig(needfrag) update the lower dst's pmtu by route cache, also update sk dst's pmtu if possible, or it will be fine if sk dst pmtu will get updated on tx path. - redirect update the lower dst's gw by route cache and return, no need to send this redirect packet to user sk. - others send the packet to user's sk, or it will also be fine to use err_count to count it and report fail link on tx path. All ipv4 tunnels basically follow this while some of ipv6 tunnels are doing in different ways, like ip6gre and ip6_tunnels update tnl dev's mtu instead of updating lower dst pmtu, no redirect process on their err_handlers, which doesn't make any sense and even causes performance problems. This patchset is to improve the process of redirect and toobig for ip6gre ip4ip6, ip6ip6 tunnels, as in ipv4 tunnels. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ip6_tunnel: clean up ip4ip6 and ip6ip6's err_handlersXin Long
This patch is to remove some useless codes of redirect and fix some indents on ip4ip6 and ip6ip6's err_handlers. Note that redirect icmp packet is already processed in ip6_tnl_err, the old redirect codes in ip4ip6_err actually never worked even before this patch. Besides, there's no need to send redirect to user's sk, it's for lower dst, so just remove it in this patch. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ip6_tunnel: process toobig in a better wayXin Long
The same improvement in "ip6_gre: process toobig in a better way" is needed by ip4ip6 and ip6ip6 as well. Note that ip4ip6 and ip6ip6 will also update sk dst pmtu in their err_handlers. Like I said before, gre6 could not do this as it's inner proto is not certain. But for all of them, sk dst pmtu will be updated in tx path if in need. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ip6_tunnel: add the process for redirect in ip6_tnl_errXin Long
The same process for redirect in "ip6_gre: add the process for redirect in ip6gre_err" is needed by ip4ip6 and ip6ip6 as well. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ip6_gre: process toobig in a better wayXin Long
Now ip6gre processes toobig icmp packet by setting gre dev's mtu in ip6gre_err, which would cause few things not good: - It couldn't set mtu with dev_set_mtu due to it's not in user context, which causes route cache and idev->cnf.mtu6 not to be updated. - It has to update sk dst pmtu in tx path according to gredev->mtu for ip6gre, while it updates pmtu again according to lower dst pmtu in ip6_tnl_xmit. - To change dev->mtu by toobig icmp packet is not a good idea, it should only work on pmtu. This patch is to process toobig by updating the lower dst's pmtu, as later sk dst pmtu will be updated in ip6_tnl_xmit, the same way as in ip4gre. Note that gre dev's mtu will not be updated any more, it doesn't make any sense to change dev's mtu after receiving a toobig packet. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ip6_gre: add the process for redirect in ip6gre_errXin Long
This patch is to add redirect icmp packet process for ip6gre by calling ip6_redirect() in ip6gre_err(), as in vti6_err. Prior to this patch, there's even no route cache generated after receiving redirect. Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13forcedeth: remove redudant assignments in xmitZhu Yanjun
In xmit process, the variables are set many times. In fact, it is enough for these variables to be set once. After a long time test, the throughput performance is better than before. CC: Srinivas Eeda <srinivas.eeda@oracle.com> CC: Joe Jin <joe.jin@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13Merge tag 'nfc-next-4.15-1' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-next Samuel Ortiz says: ==================== NFC 4.15 pull request This is the NFC pull request for 4.15. We have: - A new netlink command for explicitly deactivating NFC targets - i2c constification for all NFC drivers - One NFC device allocation error path fix ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13Merge branch 'Openvswitch-meter-action'David S. Miller
Andy Zhou says: ==================== Openvswitch meter action This patch series is the first attempt to add openvswitch meter support. We have previously experimented with adding metering support in nftables. However 1) It was not clear how to expose a named nftables object cleanly, and 2) the logic that implements metering is quite small, < 100 lines of code. With those two observations, it seems cleaner to add meter support in the openvswitch module directly. --- v1(RFC)->v2: remove unused code improve locking and other review comments v2 -> v3: rebase v3 -> v4: fix undefined "__udivdi3" references on 32 bit builds. use div_u64() instead. v4 -> v5: rebase ==================== Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13openvswitch: Add meter action supportAndy Zhou
Implements OVS kernel meter action support. Signed-off-by: Andy Zhou <azhou@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13openvswitch: Add meter infrastructureAndy Zhou
OVS kernel datapath so far does not support Openflow meter action. This is the first stab at adding kernel datapath meter support. This implementation supports only drop band type. Signed-off-by: Andy Zhou <azhou@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13openvswitch: export get_dp() API.Andy Zhou
Later patches will invoke get_dp() outside of datapath.c. Export it. Signed-off-by: Andy Zhou <azhou@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13openvswitch: Add meter netlink definitionsAndy Zhou
Meter has its own netlink family. Define netlink messages and attributes for communicating with the user space programs. Signed-off-by: Andy Zhou <azhou@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13Merge branch 'dsa-b53-Support-prepended-Broadcom-tags'David S. Miller
Florian Fainelli says: ==================== net: dsa: b53: Support prepended Broadcom tags This patch series adds support for prepended 4-bytes Broadcom tags that we already support. This type of tag will typically be used when interfaced to a SoC like BCM58xx (NorthStar Plus) which supports a Flow Accelerator (WIP). In that case, we need to support a slightly different tagging format. The first patch does a bit of re-factoring and passes a port index to the get_tag_protocol() function since at least two different drivers need that type of information (mt7530, b53) to support tagging or not. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net: dsa: b53: Support prepended Broadcom tagsFlorian Fainelli
On BCM58xx devices (Northstar Plus), there is an accelerator attached to port 8 which would only work if we use prepended Broadcom tags. Resolve that difference in our get_tag_protocol() function by setting the appropriate tagging protocol in that case. We need to change b53_brcm_hdr_setup() a little bit now since we can deal with two types of Broadcom tags. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net: dsa: Support prepended Broadcom tagFlorian Fainelli
Add a new type: DSA_TAG_PROTO_PREPEND which allows us to support for the 4-bytes Broadcom tag that we already support, but in a format where it is pre-pended to the packet instead of located between the MAC SA and the Ethertyper (DSA_TAG_PROTO_BRCM). Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net: dsa: tag_brcm: Prepare for supporting prepended tagFlorian Fainelli
In preparation for supporting the same Broadcom tag format, but instead of inserted between the MAC SA and EtherType, prepended to the Ethernet frame, restructure the code a little bit to make that possible and take an offset parameter. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net: dsa: Pass a port to get_tag_protocol()Florian Fainelli
A number of drivers want to check whether the configured CPU port is a possible configuration for enabling tagging, pass down the CPU port number so they verify that. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net/sched/sch_red.c: work around gcc-4.4.4 anon union initializer issueAndrew Morton
gcc-4.4.4 (at lest) has issues with initializers and anonymous unions: net/sched/sch_red.c: In function 'red_dump_offload': net/sched/sch_red.c:282: error: unknown field 'stats' specified in initializer net/sched/sch_red.c:282: warning: initialization makes integer from pointer without a cast net/sched/sch_red.c:283: error: unknown field 'stats' specified in initializer net/sched/sch_red.c:283: warning: initialization makes integer from pointer without a cast net/sched/sch_red.c: In function 'red_dump_stats': net/sched/sch_red.c:352: error: unknown field 'xstats' specified in initializer net/sched/sch_red.c:352: warning: initialization makes integer from pointer without a cast Work around this. Fixes: 602f3baf2218 ("net_sch: red: Add offload ability to RED qdisc") Cc: Nogah Frankel <nogahf@mellanox.com> Cc: Jiri Pirko <jiri@mellanox.com> Cc: Simon Horman <simon.horman@netronome.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net/mlx4: Use Kconfig flag to remove support of old gen2 Mellanox devicesSlava Shwartsman
Since Mellanox focus is on newer adapters, we would like to have the ability to disable the support for old gen2 adapters. This can be done by turning off the MLX4_CORE_GEN2 Kconfig flag. We keep it turned on by default. Signed-off-by: Slava Shwartsman <slavash@mellanox.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13af_netlink: ensure that NLMSG_DONE never fails in dumpsJason A. Donenfeld
The way people generally use netlink_dump is that they fill in the skb as much as possible, breaking when nla_put returns an error. Then, they get called again and start filling out the next skb, and again, and so forth. The mechanism at work here is the ability for the iterative dumping function to detect when the skb is filled up and not fill it past the brim, waiting for a fresh skb for the rest of the data. However, if the attributes are small and nicely packed, it is possible that a dump callback function successfully fills in attributes until the skb is of size 4080 (libmnl's default page-sized receive buffer size). The dump function completes, satisfied, and then, if it happens to be that this is actually the last skb, and no further ones are to be sent, then netlink_dump will add on the NLMSG_DONE part: nlh = nlmsg_put_answer(skb, cb, NLMSG_DONE, sizeof(len), NLM_F_MULTI); It is very important that netlink_dump does this, of course. However, in this example, that call to nlmsg_put_answer will fail, because the previous filling by the dump function did not leave it enough room. And how could it possibly have done so? All of the nla_put variety of functions simply check to see if the skb has enough tailroom, independent of the context it is in. In order to keep the important assumptions of all netlink dump users, it is therefore important to give them an skb that has this end part of the tail already reserved, so that the call to nlmsg_put_answer does not fail. Otherwise, library authors are forced to find some bizarre sized receive buffer that has a large modulo relative to the common sizes of messages received, which is ugly and buggy. This patch thus saves the NLMSG_DONE for an additional message, for the case that things are dangerously close to the brim. This requires keeping track of the errno from ->dump() across calls. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13Merge branch 'netem-add-nsec-scheduling-and-slot-feature'David S. Miller
Dave Taht says: ==================== netem: add nsec scheduling and slot feature This patch series converts netem away from the old "ticks" interface and userspace API, and adds support for a new "slot" feature intended to emulate bursty macs such as WiFi and LTE better. Changes since v2: Use u64 for packet_len_sched_time() Use simpler max(time_to_send,q->slot.slot_next) Changes since v1: Always pass new nanosecond APIs to userspace ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13netem: support delivering packets in delayed time slotsDave Taht
Slotting is a crude approximation of the behaviors of shared media such as cable, wifi, and LTE, which gather up a bunch of packets within a varying delay window and deliver them, relative to that, nearly all at once. It works within the existing loss, duplication, jitter and delay parameters of netem. Some amount of inherent latency must be specified, regardless. The new "slot" parameter specifies a minimum and maximum delay between transmission attempts. The "bytes" and "packets" parameters can be used to limit the amount of information transferred per slot. Examples of use: tc qdisc add dev eth0 root netem delay 200us \ slot 800us 10ms bytes 64k packets 42 A more correct example, using stacked netem instances and a packet limit to emulate a tail drop wifi queue with slots and variable packet delivery, with a 200Mbit isochronous underlying rate, and 20ms path delay: tc qdisc add dev eth0 root handle 1: netem delay 20ms rate 200mbit \ limit 10000 tc qdisc add dev eth0 parent 1:1 handle 10:1 netem delay 200us \ slot 800us 10ms bytes 64k packets 42 limit 512 Signed-off-by: Dave Taht <dave.taht@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13netem: add uapi to express delay and jitter in nanosecondsDave Taht
netem userspace has long relied on a horrible /proc/net/psched hack to translate the current notion of "ticks" to nanoseconds. Expressing latency and jitter instead, in well defined nanoseconds, increases the dynamic range of emulated delays and jitter in netem. It will also ease a transition where reducing a tick to nsec equivalence would constrain the max delay in prior versions of netem to only 4.3 seconds. Signed-off-by: Dave Taht <dave.taht@gmail.com> Suggested-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13netem: convert to qdisc_watchdog_schedule_nsDave Taht
Upgrade the internal netem scheduler to use nanoseconds rather than ticks throughout. Convert to and from the std "ticks" userspace api automatically, while allowing for finer grained scheduling to take place. Signed-off-by: Dave Taht <dave.taht@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13ipv6: try not to take rtnl_lock in ip6mr_sk_doneFrancesco Ruggeri
Avoid traversing the list of mr6_tables (which requires the rtnl_lock) in ip6mr_sk_done(), when we know in advance that a match will not be found. This can happen when rawv6_close()/ip6mr_sk_done() is invoked on non-mroute6 sockets. This patch helps reduce rtnl_lock contention when destroying a large number of net namespaces, each having a non-mroute6 raw socket. v2: same patch, only fixed subject line and expanded comment. Signed-off-by: Francesco Ruggeri <fruggeri@arista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-13net: realtek: r8169: remove redundant assignment to giga_ctrlColin Ian King
The variable giga_ctrl is being assigned to zero however this is never read and hence the assignment is redundant, so remove it. Cleans up clang warning: drivers/net/ethernet/realtek/r8169.c:1978:3: warning: Value stored to 'giga_ctrl' is never read Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-12modules: make sysfs attribute files readable by owner onlyLinus Torvalds
This code goes back to the historical bitkeeper tree commit 3f7b0672086 ("Module section offsets in /sys/module"), where Jonathan Corbet wanted to show people how to debug loadable modules. See https://lwn.net/Articles/88052/ from June 2004. To expose the required load address information, Jonathan added the sections subdirectory for every module in /sys/modules, and made them S_IRUGO - readable by everybody. It was a more innocent time, plus those S_IRxxx macro names are a lot more confusing than the octal numbers are, so maybe it wasn't even intentional. But here we are, thirteen years later, and I'll just change it to S_IRUSR instead. Let's see if anybody even notices. Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>