- 02 Oct, 2019 12 commits
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Shannon Nelson authored
Even though we've already turned off the queue activity with the ionic_qcq_disable(), we need to wait for any device queues that are processing packets to drain down before we try to flush our packets and tear down the queues. Signed-off-by:
Shannon Nelson <snelson@pensando.io> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Shannon Nelson authored
Wire up the --set-fec and --show-fec features in the ethtool callbacks and pull the related code out of set_link_ksettings. Signed-off-by:
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Shannon Nelson authored
The user's request for an interrupt coalescing value gets translated into a hardware value to be used with the NIC, and was getting reported back based on the hw value, which, due to hw tic resolution, could be reported as a different number than what the user originally asked for. This code now tracks both the user request and what was put into the hardware so we can report back to the user what they requested. Signed-off-by:
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Shannon Nelson authored
Replace the open-coded ionic_wait_for_bit() with the kernel's wait_on_bit_lock(). Signed-off-by:
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Shannon Nelson authored
There is no need for a goto in this bit of code. Signed-off-by:
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David S. Miller authored
Jiri Pirko says: ==================== net: introduce per-netns netdevice notifiers and use them in mlxsw Some drivers, like mlxsw, are not interested in notifications coming in for netdevices from other network namespaces. So introduce per-netns notifiers and allow to reduce overhead by listening only for notifications from the same netns. This is also a preparation for upcoming patchset "devlink: allow devlink instances to change network namespace". This resolves deadlock during reload mlxsw into initial netns made possible by 328fbe74 ("net: Close race between {un, }register_netdevice_notifier() and setup_net()/cleanup_net()"). ==================== Signed-off-by:
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Jiri Pirko authored
The mlxsw_sp instance is not interested in events happening in other network namespaces. So use "_net" variants for netdevice notifier registration/unregistration and get only events which are happening in the net the instance is in. Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Jiri Pirko authored
Often the code for example in drivers is interested in getting notifier call only from certain network namespace. In addition to the existing global netdevice notifier chain introduce per-netns chains and allow users to register to that. Eventually this would eliminate unnecessary overhead in case there are many netdevices in many network namespaces. Signed-off-by:
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Jiri Pirko authored
Push iterations over net namespaces and netdevices from register_netdevice_notifier() and unregister_netdevice_notifier() into helper functions. Along with that introduce continue_reverse macros to make the code a bit nicer allowing to get rid of "last" marks. Signed-off-by:
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Prashant Malani authored
Use a guard clause in tx_bottom() to reduce the indentation of the do-while loop. Also, fix a couple of spelling and grammatical mistakes in the r8152_csum_workaround() function comment. Change-Id: I460befde150ad92248fd85b0f189ec2df2ab8431 Signed-off-by:
Prashant Malani <pmalani@chromium.org> Reviewed-by:
Grant Grundler <grundler@chromium.org> Acked-by:
Hayes Wang <hayeswang@realtek.com> Signed-off-by:
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Matias Ezequiel Vara Larsen authored
This patch adds support for MSG_PEEK. In such a case, packets are not removed from the rx_queue and credit updates are not sent. Signed-off-by:
Matias Ezequiel Vara Larsen <matiasevara@gmail.com> Reviewed-by:
Stefano Garzarella <sgarzare@redhat.com> Tested-by:
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Johan Hovold authored
Fix NULL-pointer dereference on tty open due to a failure to handle a missing interrupt-in endpoint when probing modem ports: BUG: kernel NULL pointer dereference, address: 0000000000000006 ... RIP: 0010:tiocmget_submit_urb+0x1c/0xe0 [hso] ... Call Trace: hso_start_serial_device+0xdc/0x140 [hso] hso_serial_open+0x118/0x1b0 [hso] tty_open+0xf1/0x490 Fixes: 542f5482 ("tty: Modem functions for the HSO driver") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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- 01 Oct, 2019 14 commits
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Simon Horman authored
Convert Renesas Electronics SH EtherMAC bindings documentation to json-schema. Also name bindings documentation file according to the compat string being documented. Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Reviewed-by:
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by:
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Peter Fink authored
Adopt and integrate the feature to pass the MAC address via device tree from asix_device.c (03fc5d4f) also to other ax88179 based asix chips. E.g. the bootloader fills in local-mac-address and the driver will then pick up and use this MAC address. Signed-off-by:
Peter Fink <pfink@christ-es.de> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Nicolas Dichtel authored
Just put related code together to ease code reading: the memcpy() is related to the nla_reserve(). Signed-off-by:
Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by:
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David S. Miller authored
Jiri Pirko says: ==================== net: introduce alternative names for network interfaces In the past, there was repeatedly discussed the IFNAMSIZ (16) limit for netdevice name length. Now when we have PF and VF representors with port names like "pfXvfY", it became quite common to hit this limit: 0123456789012345 enp131s0f1npf0vf6 enp131s0f1npf0vf22 Udev cannot rename these interfaces out-of-the-box and user needs to create custom rules to handle them. Also, udev has multiple schemes of netdev names. From udev code: * Type of names: * b<number> - BCMA bus core number * c<bus_id> - bus id of a grouped CCW or CCW device, * with all leading zeros stripped [s390] * o<index>[n<phys_port_name>|d<dev_port>] * - on-board device index number * s<slot>[f<function>][n<phys_port_name>|d<dev_port>] * - hotplug slot index number * x<MAC> - MAC address * [P<domain>]p<bus>s<slot>[f<function>][n<phys_port_name>|d<dev_port>] * - PCI geographical location * [P<domain>]p<bus>s<slot>[f<function>][u<port>][..][c<config>][i<interface>] * - USB port number chain * v<slot> - VIO slot number (IBM PowerVM) * a<vendor><model>i<instance> - Platform bus ACPI instance id * i<addr>n<phys_port_name> - Netdevsim bus address and port name One device can be often renamed by multiple patterns at the same time (e.g. pci address/mac). This patchset introduces alternative names for network interfaces. Main goal is to: 1) Overcome the IFNAMSIZ limitation (altname limitation is 128 bytes) 2) Allow to have multiple names at the same time (multiple udev patterns) 3) Allow to use alternative names as handle for commands The patchset introduces two new commands to add/delete list of properties. Currently only alternative names are implemented but the ifrastructure could be easily extended later on. This is very similar to the list of vlan and tunnels being added/deleted to/from bridge ports. See following examples. $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff -> Add alternative names for dummy0: $ ip link prop add dummy0 altname someothername $ ip link prop add dummy0 altname someotherveryveryveryverylongname $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname someothername altname someotherveryveryveryverylongname $ ip link show someotherveryveryveryverylongname 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname someothername altname someotherveryveryveryverylongname -> Add bridge brx, add it's alternative name and use alternative names to do enslavement. $ ip link add name brx type bridge $ ip link prop add brx altname mypersonalsuperspecialbridge $ ip link set someotherveryveryveryverylongname master mypersonalsuperspecialbridge $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop master brx state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname someothername altname someotherveryveryveryverylongname 3: brx: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname mypersonalsuperspecialbridge -> Add ipv4 address to the bridge using alternative name: $ ip addr add 192.168.0.1/24 dev mypersonalsuperspecialbridge $ ip addr show mypersonalsuperspecialbridge 3: brx: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname mypersonalsuperspecialbridge inet 192.168.0.1/24 scope global brx valid_lft forever preferred_lft forever -> Delete one of dummy0 alternative names: $ ip link prop del dummy0 altname someotherveryveryveryverylongname $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop master brx state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname someothername 3: brx: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname mypersonalsuperspecialbridge -> Add multiple alternative names at once $ ip link prop add dummy0 altname a altname b altname c altname d $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop master brx state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname someothername altname a altname b altname c altname d 3: brx: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether ae:67:a9:67:46:86 brd ff:ff:ff:ff:ff:ff altname mypersonalsuperspecialbridge ==================== Signed-off-by: -
Jiri Pirko authored
Extend the basic rtnetlink commands to use alternative interface names as a handle instead of ifindex and ifname. Signed-off-by:
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Jiri Pirko authored
Introduce helper function rtnl_get_dev() that gets net_device structure instance pointer according to passed ifname or ifname attribute. Signed-off-by:
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Jiri Pirko authored
__rtnl_newlink() code flow is a bit different around tb[IFLA_IFNAME] processing comparing to the other places. Change that to be unified with the rest. Signed-off-by:
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Jiri Pirko authored
Extend exiting getlink info message with list of properties. Now the only ones are alternative names. Signed-off-by:
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Jiri Pirko authored
Add two commands to add and delete list of link properties. Implement the first property type along - alternative ifnames. Each net device can have multiple alternative names. Signed-off-by:
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Jiri Pirko authored
Introduce name_node structure to hold name of device and put it into hashlist instead of putting there struct net_device directly. Add a necessary infrastructure to manipulate the hashlist. This prepares the code to use the same hashlist for alternative names introduced later in this set. Signed-off-by:
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Jiri Pirko authored
Name hashlist is going to be used for more than just dev->name, so use rather index hashlist for iteration over net_device instances. Signed-off-by:
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Eric Dumazet authored
tcp_twsk_unique() has a hard coded assumption about ipv4 loopback being 127/8 Lets instead use the standard ipv4_is_loopback() method, in a new ipv6_addr_v4mapped_loopback() helper. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Julio Faracco authored
Function netif_schedule_queue() has a hardcoded comparison between queue state and any xoff flag. This comparison does the same thing as method netif_xmit_stopped(). In terms of code clarity, it is better. See other methods like: generic_xdp_tx() and dev_direct_xmit(). Signed-off-by:
Julio Faracco <jcfaracco@gmail.com> Signed-off-by:
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Prashant Malani authored
The same for-loop check for the LINK_LIST_READY bit of an OOB_CTRL register is used in several places. Factor these out into a single function to reduce the lines of code. Change-Id: I20e8f327045a72acc0a83e2d145ae2993ab62915 Signed-off-by:
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- 29 Sep, 2019 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Sanity check URB networking device parameters to avoid divide by zero, from Oliver Neukum. 2) Disable global multicast filter in NCSI, otherwise LLDP and IPV6 don't work properly. Longer term this needs a better fix tho. From Vijay Khemka. 3) Small fixes to selftests (use ping when ping6 is not present, etc.) from David Ahern. 4) Bring back rt_uses_gateway member of struct rtable, it's semantics were not well understood and trying to remove it broke things. From David Ahern. 5) Move usbnet snaity checking, ignore endpoints with invalid wMaxPacketSize. From Bjørn Mork. 6) Missing Kconfig deps for sja1105 driver, from Mao Wenan. 7) Various small fixes to the mlx5 DR steering code, from Alaa Hleihel, Alex Vesker, and Yevgeny Kliteynik 8) Missing CAP_NET_RAW checks in various places, from Ori Nimron. 9) Fix crash when removing sch_cbs entry while offloading is enabled, from Vinicius Costa Gomes. 10) Signedness bug fixes, generally in looking at the result given by of_get_phy_mode() and friends. From Dan Crapenter. 11) Disable preemption around BPF_PROG_RUN() calls, from Eric Dumazet. 12) Don't create VRF ipv6 rules if ipv6 is disabled, from David Ahern. 13) Fix quantization code in tcp_bbr, from Kevin Yang. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (127 commits) net: tap: clean up an indentation issue nfp: abm: fix memory leak in nfp_abm_u32_knode_replace tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state sk_buff: drop all skb extensions on free and skb scrubbing tcp_bbr: fix quantization code to not raise cwnd if not probing bandwidth mlxsw: spectrum_flower: Fail in case user specifies multiple mirror actions Documentation: Clarify trap's description mlxsw: spectrum: Clear VLAN filters during port initialization net: ena: clean up indentation issue NFC: st95hf: clean up indentation issue net: phy: micrel: add Asym Pause workaround for KSZ9021 net: socionext: ave: Avoid using netdev_err() before calling register_netdev() ptp: correctly disable flags on old ioctls lib: dimlib: fix help text typos net: dsa: microchip: Always set regmap stride to 1 nfp: flower: fix memory leak in nfp_flower_spawn_vnic_reprs nfp: flower: prevent memory leak in nfp_flower_spawn_phy_reprs net/sched: Set default of CONFIG_NET_TC_SKB_EXT to N vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled net: sched: sch_sfb: don't call qdisc_put() while holding tree lock ...
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- 28 Sep, 2019 11 commits
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Linus Torvalds authored
Merge hugepage allocation updates from David Rientjes: "We (mostly Linus, Andrea, and myself) have been discussing offlist how to implement a sane default allocation strategy for hugepages on NUMA platforms. With these reverts in place, the page allocator will happily allocate a remote hugepage immediately rather than try to make a local hugepage available. This incurs a substantial performance degradation when memory compaction would have otherwise made a local hugepage available. This series reverts those reverts and attempts to propose a more sane default allocation strategy specifically for hugepages. Andrea acknowledges this is likely to fix the swap storms that he originally reported that resulted in the patches that removed __GFP_THISNODE from hugepage allocations. The immediate goal is to return 5.3 to the behavior the kernel has implemented over the past several years so that remote hugepages are not immediately allocated when local hugepages could have been made available because the increased access latency is untenable. The next goal is to introduce a sane default allocation strategy for hugepages allocations in general regardless of the configuration of the system so that we prevent thrashing of local memory when compaction is unlikely to succeed and can prefer remote hugepages over remote native pages when the local node is low on memory." Note on timing: this reverts the hugepage VM behavior changes that got introduced fairly late in the 5.3 cycle, and that fixed a huge performance regression for certain loads that had been around since 4.18. Andrea had this note: "The regression of 4.18 was that it was taking hours to start a VM where 3.10 was only taking a few seconds, I reported all the details on lkml when it was finally tracked down in August 2018. https://lore.kernel.org/linux-mm/20180820032640.9896-2-aarcange@redhat.com/ __GFP_THISNODE in MADV_HUGEPAGE made the above enterprise vfio workload degrade like in the "current upstream" above. And it still would have been that bad as above until 5.3-rc5" where the bad behavior ends up happening as you fill up a local node, and without that change, you'd get into the nasty swap storm behavior due to compaction working overtime to make room for more memory on the nodes. As a result 5.3 got the two performance fix reverts in rc5. However, David Rientjes then noted that those performance fixes in turn regressed performance for other loads - although not quite to the same degree. He suggested reverting the reverts and instead replacing them with two small changes to how hugepage allocations are done (patch descriptions rephrased by me): - "avoid expensive reclaim when compaction may not succeed": just admit that the allocation failed when you're trying to allocate a huge-page and compaction wasn't successful. - "allow hugepage fallback to remote nodes when madvised": when that node-local huge-page allocation failed, retry without forcing the local node. but by then I judged it too late to replace the fixes for a 5.3 release. So 5.3 was released with behavior that harked back to the pre-4.18 logic. But now we're in the merge window for 5.4, and we can see if this alternate model fixes not just the horrendous swap storm behavior, but also restores the performance regression that the late reverts caused. Fingers crossed. * emailed patches from David Rientjes <rientjes@google.com>: mm, page_alloc: allow hugepage fallback to remote nodes when madvised mm, page_alloc: avoid expensive reclaim when compaction may not succeed Revert "Revert "Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask"" Revert "Revert "mm, thp: restore node-local hugepage allocations"" -
David Rientjes authored
For systems configured to always try hard to allocate transparent hugepages (thp defrag setting of "always") or for memory that has been explicitly madvised to MADV_HUGEPAGE, it is often better to fallback to remote memory to allocate the hugepage if the local allocation fails first. The point is to allow the initial call to __alloc_pages_node() to attempt to defragment local memory to make a hugepage available, if possible, rather than immediately fallback to remote memory. Local hugepages will always have a better access latency than remote (huge)pages, so an attempt to make a hugepage available locally is always preferred. If memory compaction cannot be successful locally, however, it is likely better to fallback to remote memory. This could take on two forms: either allow immediate fallback to remote memory or do per-zone watermark checks. It would be possible to fallback only when per-zone watermarks fail for order-0 memory, since that would require local reclaim for all subsequent faults so remote huge allocation is likely better than thrashing the local zone for large workloads. In this case, it is assumed that because the system is configured to try hard to allocate hugepages or the vma is advised to explicitly want to try hard for hugepages that remote allocation is better when local allocation and memory compaction have both failed. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Rientjes authored
Memory compaction has a couple significant drawbacks as the allocation order increases, specifically: - isolate_freepages() is responsible for finding free pages to use as migration targets and is implemented as a linear scan of memory starting at the end of a zone, - failing order-0 watermark checks in memory compaction does not account for how far below the watermarks the zone actually is: to enable migration, there must be *some* free memory available. Per the above, watermarks are not always suffficient if isolate_freepages() cannot find the free memory but it could require hundreds of MBs of reclaim to even reach this threshold (read: potentially very expensive reclaim with no indication compaction can be successful), and - if compaction at this order has failed recently so that it does not even run as a result of deferred compaction, looping through reclaim can often be pointless. For hugepage allocations, these are quite substantial drawbacks because these are very high order allocations (order-9 on x86) and falling back to doing reclaim can potentially be *very* expensive without any indication that compaction would even be successful. Reclaim itself is unlikely to free entire pageblocks and certainly no reliance should be put on it to do so in isolation (recall lumpy reclaim). This means we should avoid reclaim and simply fail hugepage allocation if compaction is deferred. It is also not helpful to thrash a zone by doing excessive reclaim if compaction may not be able to access that memory. If order-0 watermarks fail and the allocation order is sufficiently large, it is likely better to fail the allocation rather than thrashing the zone. Signed-off-by:
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David Rientjes authored
This reverts commit 92717d42. Since commit a8282608 ("Revert "mm, thp: restore node-local hugepage allocations"") is reverted in this series, it is better to restore the previous 5.2 behavior between the thp allocation and the page allocator rather than to attempt any consolidation or cleanup for a policy that is now reverted. It's less risky during an rc cycle and subsequent patches in this series further modify the same policy that the pre-5.3 behavior implements. Consolidation and cleanup can be done subsequent to a sane default page allocation strategy, so this patch reverts a cleanup done on a strategy that is now reverted and thus is the least risky option. Signed-off-by:
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David Rientjes authored
This reverts commit a8282608. The commit references the original intended semantic for MADV_HUGEPAGE which has subsequently taken on three unique purposes: - enables or disables thp for a range of memory depending on the system's config (is thp "enabled" set to "always" or "madvise"), - determines the synchronous compaction behavior for thp allocations at fault (is thp "defrag" set to "always", "defer+madvise", or "madvise"), and - reverts a previous MADV_NOHUGEPAGE (there is no madvise mode to only clear previous hugepage advice). These are the three purposes that currently exist in 5.2 and over the past several years that userspace has been written around. Adding a NUMA locality preference adds a fourth dimension to an already conflated advice mode. Based on the semantic that MADV_HUGEPAGE has provided over the past several years, there exist workloads that use the tunable based on these principles: specifically that the allocation should attempt to defragment a local node before falling back. It is agreed that remote hugepages typically (but not always) have a better access latency than remote native pages, although on Naples this is at parity for intersocket. The revert commit that this patch reverts allows hugepage allocation to immediately allocate remotely when local memory is fragmented. This is contrary to the semantic of MADV_HUGEPAGE over the past several years: that is, memory compaction should be attempted locally before falling back. The performance degradation of remote hugepages over local hugepages on Rome, for example, is 53.5% increased access latency. For this reason, the goal is to revert back to the 5.2 and previous behavior that would attempt local defragmentation before falling back. With the patch that is reverted by this patch, we see performance degradations at the tail because the allocator happily allocates the remote hugepage rather than even attempting to make a local hugepage available. zone_reclaim_mode is not a solution to this problem since it does not only impact hugepage allocations but rather changes the memory allocation strategy for *all* page allocations. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "An assortment of fixes that were either missed by me, or didn't arrive quite in time for the first v5.4 pull. - Most notable is a fix for an issue with tlbie (broadcast TLB invalidation) on Power9, when using the Radix MMU. The tlbie can race with an mtpid (move to PID register, essentially MMU context switch) on another thread of the core, which can cause stores to continue to go to a page after it's unmapped. - A fix in our KVM code to add a missing barrier, the lack of which has been observed to cause missed IPIs and subsequently stuck CPUs in the host. - A change to the way we initialise PCR (Processor Compatibility Register) to make it forward compatible with future CPUs. - On some older PowerVM systems our H_BLOCK_REMOVE support could oops, fix it to detect such systems and fallback to the old invalidation method. - A fix for an oops seen on some machines when using KASAN on 32-bit. - A handful of other minor fixes, and two new selftests. Thanks to: Alistair Popple, Aneesh Kumar K.V, Christophe Leroy, Gustavo Romero, Joel Stanley, Jordan Niethe, Laurent Dufour, Michael Roth, Oliver O'Halloran" * tag 'powerpc-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/eeh: Fix eeh eeh_debugfs_break_device() with SRIOV devices powerpc/nvdimm: use H_SCM_QUERY hcall on H_OVERLAP error powerpc/nvdimm: Use HCALL error as the return value selftests/powerpc: Add test case for tlbie vs mtpidr ordering issue powerpc/mm: Fixup tlbie vs mtpidr/mtlpidr ordering issue on POWER9 powerpc/book3s64/radix: Rename CPU_FTR_P9_TLBIE_BUG feature flag powerpc/book3s64/mm: Don't do tlbie fixup for some hardware revisions powerpc/pseries: Call H_BLOCK_REMOVE when supported powerpc/pseries: Read TLB Block Invalidate Characteristics KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag powerpc/mm: Fix an Oops in kasan_mmu_init() powerpc/mm: Add a helper to select PAGE_KERNEL_RO or PAGE_READONLY powerpc/64s: Set reserved PCR bits powerpc: Fix definition of PCR bits to work with old binutils powerpc/book3s64/radix: Remove WARN_ON in destroy_context() powerpc/tm: Add tm-poison test -
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fix from Ingo Molnar: "A kexec fix for the case when GCC_PLUGIN_STACKLEAK=y is enabled" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/purgatory: Disable the stackleak GCC plugin for the purgatory
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fixes from Ingo Molnar: - Apply a number of membarrier related fixes and cleanups, which fixes a use-after-free race in the membarrier code - Introduce proper RCU protection for tasks on the runqueue - to get rid of the subtle task_rcu_dereference() interface that was easy to get wrong - Misc fixes, but also an EAS speedup * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/fair: Avoid redundant EAS calculation sched/core: Remove double update_max_interval() call on CPU startup sched/core: Fix preempt_schedule() interrupt return comment sched/fair: Fix -Wunused-but-set-variable warnings sched/core: Fix migration to invalid CPU in __set_cpus_allowed_ptr() sched/membarrier: Return -ENOMEM to userspace on memory allocation failure sched/membarrier: Skip IPIs when mm->mm_users == 1 selftests, sched/membarrier: Add multi-threaded test sched/membarrier: Fix p->mm->membarrier_state racy load sched/membarrier: Call sync_core only before usermode for same mm sched/membarrier: Remove redundant check sched/membarrier: Fix private expedited registration check tasks, sched/core: RCUify the assignment of rq->curr tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code tasks, sched/core: Ensure tasks are available for a grace period after leaving the runqueue tasks: Add a count of task RCU users sched/core: Convert vcpu_is_preempted() from macro to an inline function sched/fair: Remove unused cfs_rq_clock_task() function
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Linus Torvalds authored
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull kernel lockdown mode from James Morris: "This is the latest iteration of the kernel lockdown patchset, from Matthew Garrett, David Howells and others. From the original description: This patchset introduces an optional kernel lockdown feature, intended to strengthen the boundary between UID 0 and the kernel. When enabled, various pieces of kernel functionality are restricted. Applications that rely on low-level access to either hardware or the kernel may cease working as a result - therefore this should not be enabled without appropriate evaluation beforehand. The majority of mainstream distributions have been carrying variants of this patchset for many years now, so there's value in providing a doesn't meet every distribution requirement, but gets us much closer to not requiring external patches. There are two major changes since this was last proposed for mainline: - Separating lockdown from EFI secure boot. Background discussion is covered here: https://lwn.net/Articles/751061/ - Implementation as an LSM, with a default stackable lockdown LSM module. This allows the lockdown feature to be policy-driven, rather than encoding an implicit policy within the mechanism. The new locked_down LSM hook is provided to allow LSMs to make a policy decision around whether kernel functionality that would allow tampering with or examining the runtime state of the kernel should be permitted. The included lockdown LSM provides an implementation with a simple policy intended for general purpose use. This policy provides a coarse level of granularity, controllable via the kernel command line: lockdown={integrity|confidentiality} Enable the kernel lockdown feature. If set to integrity, kernel features that allow userland to modify the running kernel are disabled. If set to confidentiality, kernel features that allow userland to extract confidential information from the kernel are also disabled. This may also be controlled via /sys/kernel/security/lockdown and overriden by kernel configuration. New or existing LSMs may implement finer-grained controls of the lockdown features. Refer to the lockdown_reason documentation in include/linux/security.h for details. The lockdown feature has had signficant design feedback and review across many subsystems. This code has been in linux-next for some weeks, with a few fixes applied along the way. Stephen Rothwell noted that commit 9d1f8be5 ("bpf: Restrict bpf when kernel lockdown is in confidentiality mode") is missing a Signed-off-by from its author. Matthew responded that he is providing this under category (c) of the DCO" * 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits) kexec: Fix file verification on S390 security: constify some arrays in lockdown LSM lockdown: Print current->comm in restriction messages efi: Restrict efivar_ssdt_load when the kernel is locked down tracefs: Restrict tracefs when the kernel is locked down debugfs: Restrict debugfs when the kernel is locked down kexec: Allow kexec_file() with appropriate IMA policy when locked down lockdown: Lock down perf when in confidentiality mode bpf: Restrict bpf when kernel lockdown is in confidentiality mode lockdown: Lock down tracing and perf kprobes when in confidentiality mode lockdown: Lock down /proc/kcore x86/mmiotrace: Lock down the testmmiotrace module lockdown: Lock down module params that specify hardware parameters (eg. ioport) lockdown: Lock down TIOCSSERIAL lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down acpi: Disable ACPI table override if the kernel is locked down acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down ACPI: Limit access to custom_method when the kernel is locked down x86/msr: Restrict MSR access when the kernel is locked down x86: Lock down IO port access when the kernel is locked down ...
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Linus Torvalds authored
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity Pull integrity updates from Mimi Zohar: "The major feature in this time is IMA support for measuring and appraising appended file signatures. In addition are a couple of bug fixes and code cleanup to use struct_size(). In addition to the PE/COFF and IMA xattr signatures, the kexec kernel image may be signed with an appended signature, using the same scripts/sign-file tool that is used to sign kernel modules. Similarly, the initramfs may contain an appended signature. This contained a lot of refactoring of the existing appended signature verification code, so that IMA could retain the existing framework of calculating the file hash once, storing it in the IMA measurement list and extending the TPM, verifying the file's integrity based on a file hash or signature (eg. xattrs), and adding an audit record containing the file hash, all based on policy. (The IMA support for appended signatures patch set was posted and reviewed 11 times.) The support for appended signature paves the way for adding other signature verification methods, such as fs-verity, based on a single system-wide policy. The file hash used for verifying the signature and the signature, itself, can be included in the IMA measurement list" * 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity: ima: ima_api: Use struct_size() in kzalloc() ima: use struct_size() in kzalloc() sefltest/ima: support appended signatures (modsig) ima: Fix use after free in ima_read_modsig() MODSIGN: make new include file self contained ima: fix freeing ongoing ahash_request ima: always return negative code for error ima: Store the measurement again when appraising a modsig ima: Define ima-modsig template ima: Collect modsig ima: Implement support for module-style appended signatures ima: Factor xattr_verify() out of ima_appraise_measurement() ima: Add modsig appraise_type option for module-style appended signatures integrity: Select CONFIG_KEYS instead of depending on it PKCS#7: Introduce pkcs7_get_digest() PKCS#7: Refactor verify_pkcs7_signature() MODSIGN: Export module signature definitions ima: initialize the "template" field with the default template
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git://linux-nfs.org/~bfields/linuxLinus Torvalds authored
Pull nfsd updates from Bruce Fields: "Highlights: - Add a new knfsd file cache, so that we don't have to open and close on each (NFSv2/v3) READ or WRITE. This can speed up read and write in some cases. It also replaces our readahead cache. - Prevent silent data loss on write errors, by treating write errors like server reboots for the purposes of write caching, thus forcing clients to resend their writes. - Tweak the code that allocates sessions to be more forgiving, so that NFSv4.1 mounts are less likely to hang when a server already has a lot of clients. - Eliminate an arbitrary limit on NFSv4 ACL sizes; they should now be limited only by the backend filesystem and the maximum RPC size. - Allow the server to enforce use of the correct kerberos credentials when a client reclaims state after a reboot. And some miscellaneous smaller bugfixes and cleanup" * tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux: (34 commits) sunrpc: clean up indentation issue nfsd: fix nfs read eof detection nfsd: Make nfsd_reset_boot_verifier_locked static nfsd: degraded slot-count more gracefully as allocation nears exhaustion. nfsd: handle drc over-allocation gracefully. nfsd: add support for upcall version 2 nfsd: add a "GetVersion" upcall for nfsdcld nfsd: Reset the boot verifier on all write I/O errors nfsd: Don't garbage collect files that might contain write errors nfsd: Support the server resetting the boot verifier nfsd: nfsd_file cache entries should be per net namespace nfsd: eliminate an unnecessary acl size limit Deprecate nfsd fault injection nfsd: remove duplicated include from filecache.c nfsd: Fix the documentation for svcxdr_tmpalloc() nfsd: Fix up some unused variable warnings nfsd: close cached files prior to a REMOVE or RENAME that would replace target nfsd: rip out the raparms cache nfsd: have nfsd_test_lock use the nfsd_file cache nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache ...
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- 27 Sep, 2019 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuseLinus Torvalds authored
Pull fuse virtio-fs support from Miklos Szeredi: "Virtio-fs allows exporting directory trees on the host and mounting them in guest(s). This isn't actually a new filesystem, but a glue layer between the fuse filesystem and a virtio based back-end. It's similar in functionality to the existing virtio-9p solution, but significantly faster in benchmarks and has better POSIX compliance. Further permformance improvements can be achieved by sharing the page cache between host and guest, allowing for faster I/O and reduced memory use. Kata Containers have been including the out-of-tree virtio-fs (with the shared page cache patches as well) since version 1.7 as an experimental feature. They have been active in development and plan to switch from virtio-9p to virtio-fs as their default solution. There has been interest from other sources as well. The userspace infrastructure is slated to be merged into qemu once the kernel part hits mainline. This was developed by Vivek Goyal, Dave Gilbert and Stefan Hajnoczi" * tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: virtio-fs: add virtiofs filesystem virtio-fs: add Documentation/filesystems/virtiofs.rst fuse: reserve values for mapping protocol
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git://github.com/martinetd/linuxLinus Torvalds authored
Pull 9p updates from Dominique Martinet: "Some of the usual small fixes and cleanup. Small fixes all around: - avoid overlayfs copy-up for PRIVATE mmaps - KUMSAN uninitialized warning for transport error - one syzbot memory leak fix in 9p cache - internal API cleanup for v9fs_fill_super" * tag '9p-for-5.4' of git://github.com/martinetd/linux: 9p/vfs_super.c: Remove unused parameter data in v9fs_fill_super 9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie 9p: Transport error uninitialized 9p: avoid attaching writeback_fid on mmap with type PRIVATE
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