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2018-10-21xarray: Add xas_for_each_conflictMatthew Wilcox1-0/+17
This iterator iterates over each entry that is stored in the index or indices specified by the xa_state. This is intended for use for a conditional store of a multiindex entry, or to allow entries which are about to be removed from the xarray to be disposed of properly. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Step through an XArrayMatthew Wilcox1-0/+67
The xas_next and xas_prev functions move the xas index by one position, and adjust the rest of the iterator state to match it. This is more efficient than calling xas_set() as it keeps the iterator at the leaves of the tree instead of walking the iterator from the root each time. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Destroy an XArrayMatthew Wilcox1-0/+1
This function frees all the internal memory allocated to the xarray and reinitialises it to be empty. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Extract entries from an XArrayMatthew Wilcox1-0/+2
The xa_extract function combines the functionality of radix_tree_gang_lookup() and radix_tree_gang_lookup_tagged(). It extracts entries matching the specified filter into a normal array. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Add XArray iteratorsMatthew Wilcox1-0/+165
The xa_for_each iterator allows the user to efficiently walk a range of the array, executing the loop body once for each entry in that range that matches the filter. This commit also includes xa_find() and xa_find_after() which are helper functions for xa_for_each() but may also be useful in their own right. In the xas family of functions, we have xas_for_each(), xas_find(), xas_next_entry(), xas_for_each_tagged(), xas_find_tagged(), xas_next_tagged() and xas_pause(). Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Add XArray conditional store operationsMatthew Wilcox1-0/+60
Like cmpxchg(), xa_cmpxchg will only store to the index if the current entry matches the old entry. It returns the current entry, which is usually more useful than the errno returned by radix_tree_insert(). For the users who really only want the errno, the xa_insert() wrapper provides a more convenient calling convention. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Add XArray unconditional store operationsMatthew Wilcox1-2/+145
xa_store() differs from radix_tree_insert() in that it will overwrite an existing element in the array rather than returning an error. This is the behaviour which most users want, and those that want more complex behaviour generally want to use the xas family of routines anyway. For memory allocation, xa_store() will first attempt to request memory from the slab allocator; if memory is not immediately available, it will drop the xa_lock and allocate memory, keeping a pointer in the xa_state. It does not use the per-CPU cache, although those will continue to exist until all radix tree users are converted to the xarray. This patch also includes xa_erase() and __xa_erase() for a streamlined way to store NULL. Since there is no need to allocate memory in order to store a NULL in the XArray, we do not need to trouble the user with deciding what memory allocation flags to use. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Add XArray marksMatthew Wilcox1-0/+63
XArray marks are like the radix tree tags, only slightly more strongly typed. They are renamed in order to distinguish them from tagged pointers. This commit adds the basic get/set/clear operations. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Add XArray load operationMatthew Wilcox1-0/+336
The xa_load function brings with it a lot of infrastructure; xa_empty(), xa_is_err(), and large chunks of the XArray advanced API that are used to implement xa_load. As the test-suite demonstrates, it is possible to use the XArray functions on a radix tree. The radix tree functions depend on the GFP flags being stored in the root of the tree, so it's not possible to use the radix tree functions on an XArray. Signed-off-by: Matthew Wilcox <[email protected]>
2018-10-21xarray: Define struct xa_nodeMatthew Wilcox2-26/+30
This is a direct replacement for struct radix_tree_node. A couple of struct members have changed name, so convert those. Use a #define so that radix tree users continue to work without change. Signed-off-by: Matthew Wilcox <[email protected]> Reviewed-by: Josef Bacik <[email protected]>
2018-10-21xarray: Add definition of struct xarrayMatthew Wilcox2-20/+78
This is a direct replacement for struct radix_tree_root. Some of the struct members have changed name; convert those, and use a #define so that radix_tree users continue to work without change. Signed-off-by: Matthew Wilcox <[email protected]> Reviewed-by: Josef Bacik <[email protected]>
2018-10-21Merge remote-tracking branches 'regmap/topic/noinc' and ↵Mark Brown1-4/+27
'regmap/topic/single-rw' into regmap-next
2018-10-20ulp: remove uid and user_visible membersDaniel Borkmann1-7/+0
They are not used anymore and therefore should be removed. Signed-off-by: Daniel Borkmann <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-20blkcg: reassociate bios when make_request() is called recursivelyDennis Zhou1-0/+3
When submitting a bio, multiple recursive calls to make_request() may occur. This causes the initial associate done in blkcg_bio_issue_check() to be incorrect and reference the prior request_queue. This introduces a helper to do reassociation when make_request() is recursively called. Fixes: a7b39b4e961c ("blkcg: always associate a bio with a blkg") Reported-by: Valdis Kletnieks <[email protected]> Signed-off-by: Dennis Zhou <[email protected]> Tested-by: Valdis Kletnieks <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2018-10-20blkcg: fix edge case for blk_get_rl() under memory pressureDennis Zhou1-1/+1
It is possible for blkg creation to fail when in blk_get_rl(). In this situation, the fallback logic returns the nearest created blkg. There is however special handling for the request_list for the root blkcg. This fixes the missing edge case from the earlier series changing blk_get_rl(). Fixes: e2b0989954ae ("blkcg: cleanup and make blk_get_rl use blkg_lookup_create") Signed-off-by: Dennis Zhou <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
2018-10-20bpf: sk_msg program helper bpf_msg_push_dataJohn Fastabend2-1/+24
This allows user to push data into a msg using sk_msg program types. The format is as follows, bpf_msg_push_data(msg, offset, len, flags) this will insert 'len' bytes at offset 'offset'. For example to prepend 10 bytes at the front of the message the user can, bpf_msg_push_data(msg, 0, 10, 0); This will invalidate data bounds so BPF user will have to then recheck data bounds after calling this. After this the msg size will have been updated and the user is free to write into the added bytes. We allow any offset/len as long as it is within the (data, data_end) range. However, a copy will be required if the ring is full and its possible for the helper to fail with ENOMEM or EINVAL errors which need to be handled by the BPF program. This can be used similar to XDP metadata to pass data between sk_msg layer and lower layers. Signed-off-by: John Fastabend <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
2018-10-20Merge branch 'for-upstream' of ↵David S. Miller1-6/+13
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg says: ==================== pull request: bluetooth-next 2018-10-20 Here's one more bluetooth-next pull request for the 4.20 kernel. - Added new USB ID for QCA_ROME controller - Added debug trace support from QCA wcn3990 controllers - Updated L2CAP to conform to latest Errata Service Release - Fix binding to non-removable BCM43430 devices Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by: David S. Miller <[email protected]>
2018-10-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller5-8/+13
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for your net-next tree: 1) Use lockdep_is_held() in ipset_dereference_protected(), from Lance Roy. 2) Remove unused variable in cttimeout, from YueHaibing. 3) Add ttl option for nft_osf, from Fernando Fernandez Mancera. 4) Use xfrm family to deal with IPv6-in-IPv4 packets from nft_xfrm, from Florian Westphal. 5) Simplify xt_osf_match_packet(). 6) Missing ct helper alias definition in snmp_trap helper, from Taehee Yoo. 7) Remove unnecessary parameter in nf_flow_table_cleanup(), from Taehee Yoo. 8) Remove unused variable definitions in nft_{dup,fwd}, from Weongyo Jeong. 9) Remove empty net/netfilter/nfnetlink_log.h file, from Taehee Yoo. 10) Revert xt_quota updates remain option due to problems in the listing path for 32-bit arches, from Maze. ==================== Signed-off-by: David S. Miller <[email protected]>
2018-10-20Merge branch 'remotes/lorenzo/pci/dwc'Bjorn Helgaas1-1/+3
- Support 100MHz/200MHz refclocks for i.MX6 (Lucas Stach) - Add initial power management for i.MX7 (Leonard Crestez) - Add PME_Turn_Off support for i.MX7 (Leonard Crestez) - Fix qcom runtime power management error handling (Bjorn Andersson) - Update TI dra7xx unaligned access errata workaround for host mode as well as endpoint mode (Vignesh R) - Fix kirin section mismatch warning (Nathan Chancellor) * remotes/lorenzo/pci/dwc: PCI: imx: Add PME_Turn_Off support ARM: dts: imx7d: Add turnoff reset dt-bindings: imx6q-pcie: Add turnoff reset for imx7d reset: imx7: Add PCIE_CTRL_APPS_TURNOFF PCI: kirin: Fix section mismatch warning PCI: dwc: pci-dra7xx: Enable errata i870 for both EP and RC mode dt-bindings: PCI: dra7xx: Add bindings for unaligned access in host mode PCI: qcom: Fix error handling in runtime PM support PCI: imx: Initial imx7d pm support PCI: imx6: Support MPLL reconfiguration for 100MHz and 200MHz refclock
2018-10-20Merge branch 'pci/peer-to-peer'Bjorn Helgaas5-0/+145
- Add PCI support for peer-to-peer DMA (Logan Gunthorpe) - Add sysfs group for PCI peer-to-peer memory statistics (Logan Gunthorpe) - Add PCI peer-to-peer DMA scatterlist mapping interface (Logan Gunthorpe) - Add PCI configfs/sysfs helpers for use by peer-to-peer users (Logan Gunthorpe) - Add PCI peer-to-peer DMA driver writer's documentation (Logan Gunthorpe) - Add block layer flag to indicate driver support for PCI peer-to-peer DMA (Logan Gunthorpe) - Map Infiniband scatterlists for peer-to-peer DMA if they contain P2P memory (Logan Gunthorpe) - Register nvme-pci CMB buffer as PCI peer-to-peer memory (Logan Gunthorpe) - Add nvme-pci support for PCI peer-to-peer memory in requests (Logan Gunthorpe) - Use PCI peer-to-peer memory in nvme (Stephen Bates, Steve Wise, Christoph Hellwig, Logan Gunthorpe) * pci/peer-to-peer: nvmet: Optionally use PCI P2P memory nvmet: Introduce helper functions to allocate and free request SGLs nvme-pci: Add support for P2P memory in requests nvme-pci: Use PCI p2pmem subsystem to manage the CMB IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]() block: Add PCI P2P flag for request queue PCI/P2PDMA: Add P2P DMA driver writer's documentation docs-rst: Add a new directory for PCI documentation PCI/P2PDMA: Introduce configfs/sysfs enable attribute helpers PCI/P2PDMA: Add PCI p2pmem DMA mappings to adjust the bus offset PCI/P2PDMA: Add sysfs group to display p2pmem stats PCI/P2PDMA: Support peer-to-peer memory
2018-10-20Merge branch 'pci/misc'Bjorn Helgaas4-33/+0
- Remove unused Netronome NFP32xx Device IDs (Jakub Kicinski) - Use bitmap_zalloc() for dma_alias_mask (Andy Shevchenko) - Add switch fall-through annotations (Gustavo A. R. Silva) - Remove unused Switchtec quirk variable (Joshua Abraham) - Fix pci.c kernel-doc warning (Randy Dunlap) - Remove trivial PCI wrappers for DMA APIs (Christoph Hellwig) - Add Intel GPU device IDs to spurious interrupt quirk (Bin Meng) - Run Switchtec DMA aliasing quirk only on NTB endpoints to avoid useless dmesg errors (Logan Gunthorpe) - Update Switchtec NTB documentation (Wesley Yung) - Remove redundant "default n" from Kconfig (Bartlomiej Zolnierkiewicz) * pci/misc: PCI: pcie: Remove redundant 'default n' from Kconfig NTB: switchtec_ntb: Update switchtec documentation with prerequisites for NTB PCI: Fix Switchtec DMA aliasing quirk dmesg noise PCI: Add macro for Switchtec quirk declarations PCI: Add Device IDs for Intel GPU "spurious interrupt" quirk PCI: Remove pci_set_dma_max_seg_size() PCI: Remove pci_set_dma_seg_boundary() PCI: Remove pci_unmap_addr() wrappers for DMA API PCI / ACPI: Mark expected switch fall-through PCI: Remove set but unused variable PCI: Fix pci.c kernel-doc parameter warning PCI: Allocate dma_alias_mask with bitmap_zalloc() PCI: Remove unused NFP32xx IDs
2018-10-20Merge branch 'pci/hotplug'Bjorn Helgaas4-39/+22
- Differentiate between pciehp surprise and safe removal (Lukas Wunner) - Remove unnecessary pciehp includes (Lukas Wunner) - Drop pciehp hotplug_slot_ops wrappers (Lukas Wunner) - Tolerate PCIe Slot Presence Detect being hardwired to zero to workaround broken hardware, e.g., the Wilocity switch/wireless device (Lukas Wunner) - Unify pciehp controller & slot structs (Lukas Wunner) - Constify hotplug_slot_ops (Lukas Wunner) - Drop hotplug_slot_info (Lukas Wunner) - Embed hotplug_slot struct into users instead of allocating it separately (Lukas Wunner) - Initialize PCIe port service drivers directly instead of relying on initcall ordering (Keith Busch) - Restore PCI config state after a slot reset (Keith Busch) - Save/restore DPC config state along with other PCI config state (Keith Busch) - Reference count devices during AER handling to avoid race issue with concurrent hot removal (Keith Busch) - If an Upstream Port reports ERR_FATAL, don't try to read the Port's config space because it is probably unreachable (Keith Busch) - During error handling, use slot-specific reset instead of secondary bus reset to avoid link up/down issues on hotplug ports (Keith Busch) - Restore previous AER/DPC handling that does not remove and re-enumerate devices on ERR_FATAL (Keith Busch) - Notify all drivers that may be affected by error recovery resets (Keith Busch) - Always generate error recovery uevents, even if a driver doesn't have error callbacks (Keith Busch) - Make PCIe link active reporting detection generic (Keith Busch) - Support D3cold in PCIe hierarchies during system sleep and runtime, including hotplug and Thunderbolt ports (Mika Westerberg) - Handle hpmemsize/hpiosize kernel parameters uniformly, whether slots are empty or occupied (Jon Derrick) - Remove duplicated include from pci/pcie/err.c and unused variable from cpqphp (YueHaibing) - Remove driver pci_cleanup_aer_uncorrect_error_status() calls (Oza Pawandeep) - Uninline PCI bus accessors for better ftracing (Keith Busch) - Remove unused AER Root Port .error_resume method (Keith Busch) - Use kfifo in AER instead of a local version (Keith Busch) - Use threaded IRQ in AER bottom half (Keith Busch) - Use managed resources in AER core (Keith Busch) - Reuse pcie_port_find_device() for AER injection (Keith Busch) - Abstract AER interrupt handling to disconnect error injection (Keith Busch) - Refactor AER injection callbacks to simplify future improvments (Keith Busch) * pci/hotplug: PCI/AER: Refactor error injection fallbacks PCI/AER: Abstract AER interrupt handling PCI/AER: Reuse existing pcie_port_find_device() interface PCI/AER: Use managed resource allocations PCI/AER: Use threaded IRQ for bottom half PCI/AER: Use kfifo_in_spinlocked() to insert locked elements PCI/AER: Use kfifo for tracking events instead of reimplementing it PCI/AER: Remove error source from AER struct aer_rpc PCI/AER: Remove unused aer_error_resume() PCI: Uninline PCI bus accessors for better ftracing PCI/AER: Remove pci_cleanup_aer_uncorrect_error_status() calls PCI: pnv_php: Use kmemdup() PCI: cpqphp: Remove set but not used variable 'physical_slot' PCI/ERR: Remove duplicated include from err.c PCI: Equalize hotplug memory and io for occupied and empty slots PCI / ACPI: Whitelist D3 for more PCIe hotplug ports ACPI / property: Allow multiple property compatible _DSD entries PCI/PME: Implement runtime PM callbacks PCI: pciehp: Implement runtime PM callbacks PCI/portdrv: Add runtime PM hooks for port service drivers PCI/portdrv: Resume upon exit from system suspend if left runtime suspended PCI: pciehp: Do not handle events if interrupts are masked PCI: pciehp: Disable hotplug interrupt during suspend PCI / ACPI: Enable wake automatically for power managed bridges PCI: Do not skip power-managed bridges in pci_enable_wake() PCI: Make link active reporting detection generic PCI: Unify device inaccessible PCI/ERR: Always report current recovery status for udev PCI/ERR: Simplify broadcast callouts PCI/ERR: Run error recovery callbacks for all affected devices PCI/ERR: Handle fatal error recovery PCI/ERR: Use slot reset if available PCI/AER: Don't read upstream ports below fatal errors PCI/AER: Take reference on error devices PCI/DPC: Save and restore config state PCI: portdrv: Restore PCI config state on slot reset PCI: portdrv: Initialize service drivers directly PCI: hotplug: Document TODOs PCI: hotplug: Embed hotplug_slot PCI: hotplug: Drop hotplug_slot_info PCI: hotplug: Constify hotplug_slot_ops PCI: pciehp: Reshuffle controller struct for clarity PCI: pciehp: Rename controller struct members for clarity PCI: pciehp: Unify controller and slot structs PCI: pciehp: Tolerate Presence Detect hardwired to zero PCI: pciehp: Drop hotplug_slot_ops wrappers PCI: pciehp: Drop unnecessary includes PCI: pciehp: Differentiate between surprise and safe removal PCI: Simplify disconnected marking
2018-10-20Merge tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drmGreg Kroah-Hartman1-0/+11
Dave writes: "drm fixes for 4.19 final (part 2) Looked like two stragglers snuck in, one very urgent the pageflipping was missing a reference that could result in a GPF on non-i915 drivers, the other is an overflow in the sun4i dotclock calcs resulting in a mode not getting set." * tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drm: drm/sun4i: Fix an ulong overflow in the dotclock driver drm: Get ref on CRTC commit object when waiting for flip_done
2018-10-20Merge tag 'drm-misc-fixes-2018-10-19' of ↵Dave Airlie1-0/+11
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes Second pull request for v4.19: - Fix ulong overflow in sun4i - Fix a serious GPF in waiting for flip_done from commit_tail(). Signed-off-by: Dave Airlie <[email protected]> From: Maarten Lankhorst <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2018-10-19drm/dp: Add definitions for eDP Rev 1.4a and 1.4bManasi Navare1-0/+2
VESA eDP 1.4 specification has separate fields defined in EDP_DPCD_REV for eDP 1.4a and 1.4b eDP revisions. This patch defines those. Found this when one of my eDP panels advertises eDP 1.4a (04h) in the EDP_DPCD_REV DPCD field. Cc: Jani Nikula <[email protected]> Cc: Ville Syrjala <[email protected]> Signed-off-by: Manasi Navare <[email protected]> Reviewed-by: Ville Syrjälä <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2018-10-19net: phy: micrel: add Microchip KSZ9131 initial driverYuiko Oshino1-0/+1
Add support for Microchip Technology KSZ9131 10/100/1000 Ethernet PHY Signed-off-by: Yuiko Oshino <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2018-10-19netpoll: allow cleanup to be synchronousDebabrata Banerjee1-3/+1
This fixes a problem introduced by: commit 2cde6acd49da ("netpoll: Fix __netpoll_rcu_free so that it can hold the rtnl lock") When using netconsole on a bond, __netpoll_cleanup can asynchronously recurse multiple times, each __netpoll_free_async call can result in more __netpoll_free_async's. This means there is now a race between cleanup_work queues on multiple netpoll_info's on multiple devices and the configuration of a new netpoll. For example if a netconsole is set to enable 0, reconfigured, and enable 1 immediately, this netconsole will likely not work. Given the reason for __netpoll_free_async is it can be called when rtnl is not locked, if it is locked, we should be able to execute synchronously. It appears to be locked everywhere it's called from. Generalize the design pattern from the teaming driver for current callers of __netpoll_free_async. CC: Neil Horman <[email protected]> CC: "David S. Miller" <[email protected]> Signed-off-by: Debabrata Banerjee <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2018-10-20bpf: skmsg, fix psock create on existing kcm/tls portJohn Fastabend1-5/+20
Before using the psock returned by sk_psock_get() when adding it to a sockmap we need to ensure it is actually a sockmap based psock. Previously we were only checking this after incrementing the reference counter which was an error. This resulted in a slab-out-of-bounds error when the psock was not actually a sockmap type. This moves the check up so the reference counter is only used if it is a sockmap psock. Eric reported the following KASAN BUG, BUG: KASAN: slab-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] BUG: KASAN: slab-out-of-bounds in refcount_inc_not_zero_checked+0x97/0x2f0 lib/refcount.c:120 Read of size 4 at addr ffff88019548be58 by task syz-executor4/22387 CPU: 1 PID: 22387 Comm: syz-executor4 Not tainted 4.19.0-rc7+ #264 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] refcount_inc_not_zero_checked+0x97/0x2f0 lib/refcount.c:120 sk_psock_get include/linux/skmsg.h:379 [inline] sock_map_link.isra.6+0x41f/0xe30 net/core/sock_map.c:178 sock_hash_update_common+0x19b/0x11e0 net/core/sock_map.c:669 sock_hash_update_elem+0x306/0x470 net/core/sock_map.c:738 map_update_elem+0x819/0xdf0 kernel/bpf/syscall.c:818 Signed-off-by: John Fastabend <[email protected]> Reported-by: Eric Dumazet <[email protected]> Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Signed-off-by: Daniel Borkmann <[email protected]>
2018-10-19bpf: add cg_skb_is_valid_access for BPF_PROG_TYPE_CGROUP_SKBSong Liu1-0/+21
BPF programs of BPF_PROG_TYPE_CGROUP_SKB need to access headers in the skb. This patch enables direct access of skb for these programs. Two helper functions bpf_compute_and_save_data_end() and bpf_restore_data_end() are introduced. There are used in __cgroup_bpf_run_filter_skb(), to compute proper data_end for the BPF program, and restore original data afterwards. Signed-off-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-19bpf: add MAP_LOOKUP_AND_DELETE_ELEM syscallMauricio Vasquez B1-0/+1
The previous patch implemented a bpf queue/stack maps that provided the peek/pop/push functions. There is not a direct relationship between those functions and the current maps syscalls, hence a new MAP_LOOKUP_AND_DELETE_ELEM syscall is added, this is mapped to the pop operation in the queue/stack maps and it is still to implement in other kind of maps. Signed-off-by: Mauricio Vasquez B <[email protected]> Acked-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-19bpf: add queue and stack mapsMauricio Vasquez B3-1/+36
Queue/stack maps implement a FIFO/LIFO data storage for ebpf programs. These maps support peek, pop and push operations that are exposed to eBPF programs through the new bpf_map[peek/pop/push] helpers. Those operations are exposed to userspace applications through the already existing syscalls in the following way: BPF_MAP_LOOKUP_ELEM -> peek BPF_MAP_LOOKUP_AND_DELETE_ELEM -> pop BPF_MAP_UPDATE_ELEM -> push Queue/stack maps are implemented using a buffer, tail and head indexes, hence BPF_F_NO_PREALLOC is not supported. As opposite to other maps, queue and stack do not use RCU for protecting maps values, the bpf_map[peek/pop] have a ARG_PTR_TO_UNINIT_MAP_VALUE argument that is a pointer to a memory zone where to save the value of a map. Basically the same as ARG_PTR_TO_UNINIT_MEM, but the size has not be passed as an extra argument. Our main motivation for implementing queue/stack maps was to keep track of a pool of elements, like network ports in a SNAT, however we forsee other use cases, like for exampling saving last N kernel events in a map and then analysing from userspace. Signed-off-by: Mauricio Vasquez B <[email protected]> Acked-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-19bpf/verifier: add ARG_PTR_TO_UNINIT_MAP_VALUEMauricio Vasquez B1-0/+1
ARG_PTR_TO_UNINIT_MAP_VALUE argument is a pointer to a memory zone used to save the value of a map. Basically the same as ARG_PTR_TO_UNINIT_MEM, but the size has not be passed as an extra argument. This will be used in the following patch that implements some new helpers that receive a pointer to be filled with a map value. Signed-off-by: Mauricio Vasquez B <[email protected]> Acked-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-19bpf: rename stack trace map operationsMauricio Vasquez B1-1/+1
In the following patches queue and stack maps (FIFO and LIFO datastructures) will be implemented. In order to avoid confusion and a possible name clash rename stack_map_ops to stack_trace_map_ops Signed-off-by: Mauricio Vasquez B <[email protected]> Acked-by: Song Liu <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
2018-10-19remoteproc: Add mechanism for custom dump function assignmentSibi Sankar1-0/+6
This patch adds a mechanism for assigning each rproc dump segment with a custom dump function and private data. The dump function is to be called for each rproc segment during coredump if assigned. Signed-off-by: Sibi Sankar <[email protected]> [bjorn: reordred arguments to rproc_coredump_add_custom_segment()] Signed-off-by: Bjorn Andersson <[email protected]>
2018-10-19remoteproc: Introduce custom dump function for each remoteproc segmentSibi Sankar1-0/+6
Introduce custom dump function and private data per remoteproc dump segment. The dump function is responsible for filling the device memory segment associated with coredump Signed-off-by: Sibi Sankar <[email protected]> Signed-off-by: Bjorn Andersson <[email protected]>
2018-10-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller12-19/+62
net/sched/cls_api.c has overlapping changes to a call to nlmsg_parse(), one (from 'net') added rtm_tca_policy instead of NULL to the 5th argument, and another (from 'net-next') added cb->extack instead of NULL to the 6th argument. net/ipv4/ipmr_base.c is a case of a bug fix in 'net' being done to code which moved (to mr_table_dump)) in 'net-next'. Thanks to David Ahern for the heads up. Signed-off-by: David S. Miller <[email protected]>
2018-10-19Merge tag 'kvmarm-for-v4.20' of ↵Paolo Bonzini4-8/+28
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm updates for 4.20 - Improved guest IPA space support (32 to 52 bits) - RAS event delivery for 32bit - PMU fixes - Guest entry hardening - Various cleanups
2018-10-19fs: group frequently accessed fields of struct super_block togetherAmir Goldstein1-10/+14
Kernel test robot reported [1] a 6% performance regression in a concurrent unlink(2) workload on commit 60f7ed8c7c4d ("fsnotify: send path type events to group with super block marks"). The performance test was run with no fsnotify marks at all on the data set, so the only extra instructions added by the offending commit are tests of the super_block fields s_fsnotify_{marks,mask} and these tests happen on almost every single inode access. When adding those fields to the super_block struct, we did not give much thought of placing them on a hot cache lines (we just placed them at the end of the struct). Re-organize struct super_block to try and keep some frequently accessed fields on the same cache line. Move the frequently accessed fields s_fsnotify_{marks,mask} near the frequently accessed fields s_fs_info,s_time_gran, while filling a 64bit alignment hole after s_time_gran. Move the seldom accessed fields s_id,s_uuid,s_max_links,s_mode near the seldom accessed fields s_vfs_rename_mutex,s_subtype. Rong Chen confirmed that this patch solved the reported problem. [1] https://lkml.org/lkml/2018/9/30/206 Reported-by: kernel test robot <[email protected]> Tested-by: kernel test robot <[email protected]> Fixes: 1e6cb72399 ("fsnotify: add super block object type") Signed-off-by: Amir Goldstein <[email protected]> Signed-off-by: Jan Kara <[email protected]>
2018-10-19regulator: bd718x7: Remove struct bd718xx_pmicAxel Lin1-2/+0
All the fields in struct bd718xx_pmic are not really necessary. Remove struct bd718xx_pmic to simplify the code. Signed-off-by: Axel Lin <[email protected]> Reviewed-by: Matti Vaittinen <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2018-10-19Revert "netfilter: xt_quota: fix the behavior of xt_quota module"Pablo Neira Ayuso1-5/+3
This reverts commit e9837e55b0200da544a095a1fca36efd7fd3ba30. When talking to Maze and Chenbo, we agreed to keep this back by now due to problems in the ruleset listing path with 32-bit arches. Signed-off-by: Maciej Żenczykowski <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]>
2018-10-19netfilter: nfnetlink_log: remove empty nfnetlink_log.h header fileTaehee Yoo1-1/+0
/include/net/netfilter/nfnetlink_log.h file is empty. so that it can be removed. Signed-off-by: Taehee Yoo <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]>
2018-10-19regmap: Add regmap_noinc_write APIBen Whitten1-0/+19
The regmap API had a noinc_read function added for instances where devices supported returning data from an internal FIFO in a single read. This commit adds the noinc_write variant to allow writing to a non incrementing register, this is used in devices such as the sx1301 for loading firmware. Signed-off-by: Ben Whitten <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2018-10-19netfilter: nf_flow_table: remove unnecessary parameter of ↵Taehee Yoo1-1/+1
nf_flow_table_cleanup() parameter net of nf_flow_table_cleanup() is not used. So that it can be removed. Signed-off-by: Taehee Yoo <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]>
2018-10-19drm/atomic_helper: Stop modesets on unregistered connectors harderLyude Paul1-2/+69
Unfortunately, it appears our fix in: commit b5d29843d8ef ("drm/atomic_helper: Allow DPMS On<->Off changes for unregistered connectors") Which attempted to work around the problems introduced by: commit 4d80273976bf ("drm/atomic_helper: Disallow new modesets on unregistered connectors") Is still not the right solution, as modesets can still be triggered outside of drm_atomic_set_crtc_for_connector(). So in order to fix this, while still being careful that we don't break modesets that a driver may perform before being registered with userspace, we replace connector->registered with a tristate member, connector->registration_state. This allows us to keep track of whether or not a connector is still initializing and hasn't been exposed to userspace, is currently registered and exposed to userspace, or has been legitimately removed from the system after having once been present. Using this info, we can prevent userspace from performing new modesets on unregistered connectors while still allowing the driver to perform modesets on unregistered connectors before the driver has finished being registered. Changes since v1: - Fix WARN_ON() in drm_connector_cleanup() that CI caught with this patchset in igt@drv_module_reload@basic-reload-inject and igt@drv_module_reload@basic-reload by checking if the connector is registered instead of unregistered, as calling drm_connector_cleanup() on a connector that hasn't been registered with userspace yet should stay valid. - Remove unregistered_connector_check(), and just go back to what we were doing before in commit 4d80273976bf ("drm/atomic_helper: Disallow new modesets on unregistered connectors") except replacing READ_ONCE(connector->registered) with drm_connector_is_unregistered(). This gets rid of the behavior of allowing DPMS On<->Off, but that should be fine as it's more consistent with the UAPI we had before - danvet - s/drm_connector_unregistered/drm_connector_is_unregistered/ - danvet - Update documentation, fix some typos. Fixes: b5d29843d8ef ("drm/atomic_helper: Allow DPMS On<->Off changes for unregistered connectors") Cc: Ville Syrjälä <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: [email protected] Cc: David Airlie <[email protected]> Signed-off-by: Lyude Paul <[email protected]> Reviewed-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] (cherry picked from commit 39b50c603878f4f8ae541ac4088a805d588abc79) Fixes: e96550956fbc ("drm/atomic_helper: Disallow new modesets on unregistered connectors") Fixes: 34ca26a98ad6 ("drm/atomic_helper: Allow DPMS On<->Off changes for unregistered connectors") Cc: [email protected] Signed-off-by: Joonas Lahtinen <[email protected]>
2018-10-19Merge tag 'nand/for-4.20' of git://git.infradead.org/linux-mtd into mtd/nextBoris Brezillon14-571/+547
NAND core changes: - Two batchs of cleanups of the NAND API, including: * Deprecating a lot of interfaces (now replaced by ->exec_op()). * Moving code in separate drivers (JEDEC, ONFI), in private files (internals), in platform drivers, etc. * Functions/structures reordering. * Exclusive use of the nand_chip structure instead of the MTD one all across the subsystem. - Addition of the nand_wait_readrdy/rdy_op() helpers. Raw NAND controllers drivers changes: - Various coccinelle patches. - Marvell: * Use regmap_update_bits() for syscon access. * More documentation. * BCH failure path rework. * More layouts to be supported. * IRQ handler complete() condition fixed. - Fsl_ifc: * SRAM initialization fixed for newer controller versions. - Denali: * Fix licenses mismatch and use a SPDX tag. * Set SPARE_AREA_SKIP_BYTES register to 8 if unset. - Qualcomm: * Do not include dma-direct.h. - Docg4: * Removed. - Ams-delta: * Use of a GPIO lookup table * Internal machinery changes. Raw NAND chip drivers changes: - Toshiba: * Add support for Toshiba memory BENAND * Pass a single nand_chip object to the status helper. - ESMT: * New driver to retrieve the ECC requirements from the 5th ID byte.
2018-10-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netGreg Kroah-Hartman6-1/+26
David writes: "Networking 1) Fix gro_cells leak in xfrm layer, from Li RongQing. 2) BPF selftests change RLIMIT_MEMLOCK blindly, don't do that. From Eric Dumazet. 3) AF_XDP calls synchronize_net() under RCU lock, fix from Björn Töpel. 4) Out of bounds packet access in _decode_session6(), from Alexei Starovoitov. 5) Several ethtool bugs, where we copy a struct into the kernel twice and our validations of the values in the first copy can be invalidated by the second copy due to asynchronous updates to the memory by the user. From Wenwen Wang. 6) Missing netlink attribute validation in cls_api, from Davide Caratti. 7) LLC SAP sockets neet to be SOCK_RCU FREE, from Cong Wang. 8) rxrpc operates on wrong kvec, from Yue Haibing. 9) A regression was introduced by the disassosciation of route neighbour references in rt6_probe(), causing probe for neighbourless routes to not be properly rate limited. Fix from Sabrina Dubroca. 10) Unsafe RCU locking in tipc, from Tung Nguyen. 11) Use after free in inet6_mc_check(), from Eric Dumazet. 12) PMTU from icmp packets should update the SCTP transport pathmtu, from Xin Long. 13) Missing peer put on error in rxrpc, from David Howells. 14) Fix pedit in nfp driver, from Pieter Jansen van Vuuren. 15) Fix overflowing shift statement in qla3xxx driver, from Nathan Chancellor. 16) Fix Spectre v1 in ptp code, from Gustavo A. R. Silva. 17) udp6_unicast_rcv_skb() interprets udpv6_queue_rcv_skb() return value in an inverted manner, fix from Paolo Abeni. 18) Fix missed unresolved entries in ipmr dumps, from Nikolay Aleksandrov. 19) Fix NAPI handling under high load, we can completely miss events when NAPI has to loop more than one time in a cycle. From Heiner Kallweit." * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (49 commits) ip6_tunnel: Fix encapsulation layout tipc: fix info leak from kernel tipc_event net: socket: fix a missing-check bug net: sched: Fix for duplicate class dump r8169: fix NAPI handling under high load net: ipmr: fix unresolved entry dumps net: mscc: ocelot: Fix comment in ocelot_vlant_wait_for_completion() sctp: fix the data size calculation in sctp_data_size virtio_net: avoid using netif_tx_disable() for serializing tx routine udp6: fix encap return code for resubmitting mlxsw: core: Fix use-after-free when flashing firmware during init sctp: not free the new asoc when sctp_wait_for_connect returns err sctp: fix race on sctp_id2asoc r8169: re-enable MSI-X on RTL8168g net: bpfilter: use get_pid_task instead of pid_task ptp: fix Spectre v1 vulnerability net: qla3xxx: Remove overflowing shift statement geneve, vxlan: Don't set exceptions if skb->len < mtu geneve, vxlan: Don't check skb_dst() twice sctp: get pr_assoc and pr_stream all status with SCTP_PR_SCTP_ALL instead ...
2018-10-19swiotlb: don't dip into swiotlb pool for coherent allocationsChristoph Hellwig1-5/+0
All architectures that support swiotlb also have a zone that backs up these less than full addressing allocations (usually ZONE_DMA32). Because of that it is rather pointless to fall back to the global swiotlb buffer if the normal dma direct allocation failed - the only thing this will do is to eat up bounce buffers that would be more useful to serve streaming mappings. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Catalin Marinas <[email protected]> Acked-by: Konrad Rzeszutek Wilk <[email protected]>
2018-10-19compiler-gcc: remove comment about gcc 4.5 from unreachable()[email protected]1-4/+0
Remove the comment about being unable to detect __builtin_unreachable. __builtin_unreachable was implemented in the GCC 4.5 timeframe. The kernel's minimum supported version of GCC is 4.6 since commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6"). Commit cb984d101b30 ("compiler-gcc: integrate the various compiler-gcc[345].h files") shows that unreachable() had different guards based on GCC version. Suggested-by: Miguel Ojeda <[email protected]> Signed-off-by: Nick Desaulniers <[email protected]> Signed-off-by: Miguel Ojeda <[email protected]>
2018-10-19compiler.h: update definition of unreachable()[email protected]1-1/+4
Fixes the objtool warning seen with Clang: arch/x86/mm/fault.o: warning: objtool: no_context()+0x220: unreachable instruction Fixes commit 815f0ddb346c ("include/linux/compiler*.h: make compiler-*.h mutually exclusive") Josh noted that the fallback definition was meant to work around a pre-gcc-4.6 bug. GCC still needs to work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82365, so compiler-gcc.h defines its own version of unreachable(). Clang and ICC can use this shared definition. Link: https://github.com/ClangBuiltLinux/linux/issues/204 Suggested-by: Andy Lutomirski <[email protected]> Suggested-by: Josh Poimboeuf <[email protected]> Tested-by: Nathan Chancellor <[email protected]> Signed-off-by: Nick Desaulniers <[email protected]> Signed-off-by: Miguel Ojeda <[email protected]>
2018-10-19swiotlb: remove the overflow bufferChristoph Hellwig2-3/+2
Like all other dma mapping drivers just return an error code instead of an actual memory buffer. The reason for the overflow buffer was that at the time swiotlb was invented there was no way to check for dma mapping errors, but this has long been fixed. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Catalin Marinas <[email protected]> Reviewed-by: Robin Murphy <[email protected]> Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
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