Cyrill Gorcunov
0791e3644e
kcmp: add KCMP_EPOLL_TFD mode to compare epoll target files ...
With current epoll architecture target files are addressed with
file_struct and file descriptor number, where the last is not unique.
Moreover files can be transferred from another process via unix socket,
added into queue and closed then so we won't find this descriptor in the
task fdinfo list.
Thus to checkpoint and restore such processes CRIU needs to find out
where exactly the target file is present to add it into epoll queue.
For this sake one can use kcmp call where some particular target file
from the queue is compared with arbitrary file passed as an argument.
Because epoll target files can have same file descriptor number but
different file_struct a caller should explicitly specify the offset
within.
To test if some particular file is matching entry inside epoll one have
to
- fill kcmp_epoll_slot structure with epoll file descriptor,
target file number and target file offset (in case if only
one target is present then it should be 0)
- call kcmp as kcmp(pid1, pid2, KCMP_EPOLL_TFD, fd, &kcmp_epoll_slot)
- the kernel fetch file pointer matching file descriptor @fd of pid1
- lookups for file struct in epoll queue of pid2 and returns traditional
0,1,2 result for sorting purpose
Link: http://lkml.kernel.org/r/20170424154423.511592110@gmail.com
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrey Vagin <avagin@openvz.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-12 16:26:01 -07:00
main drm pull for v4.13
2017-07-09 18:48:37 -07:00
libceph: advertise support for NEW_OSDOP_ENCODING and SERVER_LUMINOUS
2017-07-07 17:26:24 +02:00
libceph, crush: per-pool crush_choose_arg_map for crush_do_rule()
2017-07-07 17:25:19 +02:00
firmware /meson
This is the bulk of GPIO changes for the v4.13 series:
2017-07-07 12:40:27 -07:00
Merge branch 'i2c/for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2017-07-12 10:04:56 -07:00
Char/Misc patches for 4.13-rc1
2017-07-03 20:55:59 -07:00
KVM: arm64: Enable GICv3 common sysreg trapping via command-line
2017-06-15 09:45:06 +01:00
chrome-platform-for-linus-4.13
2017-07-11 09:55:47 -07:00
Merge https://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-07-03 03:42:10 -07:00
mmc: slot-gpio: Add support to enable irq wake on cd_irq
2017-06-20 10:30:49 +02:00
netfilter: nfnetlink: extended ACK reporting
2017-06-19 19:38:24 +02:00
netfilter: ebt: Use new helper ebt_invalid_target to check target
2017-06-19 19:09:19 +02:00
pinctrl: generic: Add output-enable property
2017-06-29 14:30:49 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2017-07-10 09:22:48 -07:00
qed: iWARP CM add error handling
2017-07-03 01:43:45 -07:00
mm: make PR_SET_THP_DISABLE immediately active
2017-07-10 16:32:31 -07:00
Actions Semi SoC drivers for 4.13
2017-06-29 17:34:57 +02:00
This is the big bulk of pin control changes for the v4.13 series:
2017-07-06 11:38:59 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-07-05 12:31:59 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-07-05 12:31:59 -07:00
Device properties framework updates for v4.13-rc1
2017-07-10 15:23:45 -07:00
ACPI/IORT: Remove iort_node_match()
2017-06-15 11:41:37 +01:00
net, atm: convert atm_dev.refcnt from atomic_t to refcount_t
2017-07-04 22:35:16 +01:00
include/linux/backing-dev.h: simplify wb_stat_sum
2017-07-10 16:32:32 -07:00
bio-integrity: stop abusing bi_end_io
2017-07-03 17:00:59 -06:00
bitmap: use memcmp optimisation in more situations
2017-07-10 16:32:34 -07:00
percpu_counter: Rename __percpu_counter_add to percpu_counter_add_batch
2017-06-20 15:42:32 -04:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 13:08:04 -07:00
block: add support for write hints in a bio
2017-06-27 12:05:27 -06:00
block: remove the queue_bounce_pfn helper
2017-06-27 12:13:45 -06:00
mm: zero hash tables in allocator
2017-07-06 16:24:33 -07:00
bpf: BPF support for sock_ops
2017-07-01 16:15:13 -07:00
bpf: simplify narrower ctx access
2017-07-03 02:22:52 -07:00
bpf: BPF support for sock_ops
2017-07-01 16:15:13 -07:00
bpf: possibly avoid extra masking for narrower load in verifier
2017-06-23 14:04:11 -04:00
Changes for 4.13:
2017-07-10 10:51:53 -07:00
bug: split BUILD_BUG stuff out into <linux/build_bug.h>
2017-07-10 16:32:34 -07:00
bug: split BUILD_BUG stuff out into <linux/build_bug.h>
2017-07-10 16:32:34 -07:00
bio: add bvec_iter rewind API
2017-07-03 16:56:28 -06:00
cgroup: implement "nsdelegate" mount option
2017-06-28 14:45:21 -04:00
Revert "clockevents: Add a clkevt-of mechanism like clksrc-of"
2017-06-12 10:54:47 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 16:14:51 -07:00
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-06 20:57:13 -07:00
compiler, clang: always inline when CONFIG_OPTIMIZE_INLINING is disabled
2017-07-06 16:24:29 -07:00
compiler, clang: always inline when CONFIG_OPTIMIZE_INLINING is disabled
2017-07-06 16:24:29 -07:00
GCC plugin updates:
2017-07-05 11:46:59 -07:00
configfs: Introduce config_item_get_unless_zero()
2017-06-12 13:20:20 +02:00
efi: parse ARM processor error
2017-06-22 15:43:47 +01:00
x86: use common aperfmperf_khz_on_cpu() to calculate KHz using APERF/MPERF
2017-06-27 01:47:32 +02:00
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-03 18:08:06 -07:00
kdump: protect vmcoreinfo data under the crash memory
2017-07-12 16:26:00 -07:00
mm: always enable thp for dax mappings
2017-07-10 16:32:31 -07:00
include/linux/dcache.h: use unsigned chars in struct name_snapshot
2017-07-12 16:25:59 -07:00
libnvdimm for 4.13
2017-07-07 09:44:06 -07:00
Add "shutdown" to "struct class".
2017-07-07 09:49:24 +10:00
dm kcopyd: add sequential write feature
2017-06-19 11:03:51 -04:00
dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs
2017-06-28 06:55:00 -07:00
firmware: dmi_scan: Make dmi_walk and dmi_walk_early return real error codes
2017-06-15 13:46:00 +02:00
blk-mq-sched: unify request prepare methods
2017-06-18 10:08:55 -06:00
lib: add errseq_t type and infrastructure for handling it
2017-07-06 07:02:24 -04:00
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
kcmp: add KCMP_EPOLL_TFD mode to compare epoll target files
2017-07-12 16:26:01 -07:00
lib/extable.c: use bsearch() library function in search_extable()
2017-07-10 16:32:35 -07:00
include/linux/filter.h: use linux/set_memory.h
2017-07-06 16:24:30 -07:00
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
2017-07-12 09:28:55 -07:00
The first major feature for ext4 this merge window is the largedir
2017-07-09 09:31:22 -07:00
fscrypt: inline fscrypt_free_filename()
2017-06-23 19:59:08 -04:00
dentry name snapshots
2017-07-07 20:09:10 -04:00
ftrace: Have cached module filters be an active filter
2017-06-26 11:53:04 -04:00
device property: Introduce fwnode_device_is_available()
2017-06-22 02:55:34 +02:00
mm, page_alloc: pass preferred nid instead of zonelist to allocator
2017-07-06 16:24:34 -07:00
hashtable: remove repeated phrase from a comment
2017-06-30 13:49:53 -07:00
Merge branches 'for-4.13/multitouch', 'for-4.13/retrode', 'for-4.13/transport-open-close-consolidation', 'for-4.13/upstream' and 'for-4.13/wacom' into for-linus
2017-07-10 11:11:25 +02:00
gpu: host1x: Refactor channel allocation code
2017-06-15 14:25:38 +02:00
nanosleep: Use get_timespec64() and put_timespec64()
2017-06-30 04:14:14 -04:00
mm: always enable thp for dax mappings
2017-07-10 16:32:31 -07:00
hugetlb: add support for preferred node to alloc_huge_page_nodemask
2017-07-10 16:32:32 -07:00
scsi: storvsc: remove unnecessary channel inbound lock
2017-06-12 20:48:05 -04:00
i2c: Provide a stub for i2c_detect_slave_mode()
2017-07-08 21:51:43 +02:00
ieee80211: update public action codes
2017-06-30 09:47:24 +03:00
networking: make skb_push & __skb_push return void pointers
2017-06-16 11:48:40 -04:00
net: convert ip_mc_list.refcnt from atomic_t to refcount_t
2017-07-01 07:39:08 -07:00
ima: define is_ima_appraise_enabled()
2017-06-21 14:37:12 -04:00
[media] media: Add userspace header file for i.MX
2017-06-20 07:25:17 -03:00
net: convert in_device.refcnt from atomic_t to refcount_t
2017-07-01 07:39:08 -07:00
sched/cputime: Move the vtime task fields to their own struct
2017-07-05 09:54:15 +02:00
ARM: fix rd_size declaration
2017-07-10 16:32:34 -07:00
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-09 10:24:46 -07:00
Changes for 4.13:
2017-07-10 10:51:53 -07:00
genirq: Introduce IRQD_SINGLE_TARGET flag
2017-06-22 18:21:25 +02:00
genirq: Add mutex to irq desc to serialize request/free_irq()
2017-07-04 12:46:16 +02:00
genirq/irqdomain: Remove auto-recursive hierarchy support
2017-06-22 18:29:34 +02:00
kernel.h: handle pointers to arrays better in container_of()
2017-07-12 16:25:59 -07:00
kdump: protect vmcoreinfo data under the crash memory
2017-07-12 16:26:00 -07:00
There has been a fair amount of activity in the docs tree this time
2017-07-03 21:13:25 -07:00
mm: make PR_SET_THP_DISABLE immediately active
2017-07-10 16:32:31 -07:00
mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects
2017-07-06 16:24:34 -07:00
kprobes: Rename [arch_]function_offset_within_entry() to [arch_]kprobe_on_func_entry()
2017-07-08 11:05:34 +02:00
Revert "ktime: Simplify ktime_compare implementation"
2017-06-26 10:39:40 +02:00
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
Merge branch 'for-4.13/dax' into libnvdimm-for-next
2017-07-03 16:54:58 -07:00
mm/list_lru.c: fix list_lru_count_node() to be race free
2017-07-10 16:32:33 -07:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2017-07-05 11:26:35 -07:00
mbcache: make mbcache naming more generic
2017-06-22 10:29:53 -04:00
mm, memory_hotplug: move movable_node to the hotplug proper
2017-07-06 16:24:35 -07:00
mm: memcontrol: per-lruvec stats infrastructure
2017-07-06 16:24:35 -07:00
mm, memory_hotplug: move movable_node to the hotplug proper
2017-07-06 16:24:35 -07:00
mm, mempolicy: simplify rebinding mempolicies when updating cpusets
2017-07-06 16:24:34 -07:00
hugetlb: add support for preferred node to alloc_huge_page_nodemask
2017-07-10 16:32:32 -07:00
networking: introduce and use skb_put_data()
2017-06-16 11:48:37 -04:00
Writeback error handling fixes (pile #1 )
2017-07-07 18:39:15 -07:00
percpu_counter: Rename __percpu_counter_add to percpu_counter_add_batch
2017-06-20 15:42:32 -04:00
mm: disallow early_pfn_to_nid on configurations which do not implement it
2017-07-10 16:32:33 -07:00
trace: rename struct module entry for trace enums
2017-06-13 17:09:31 -04:00
moduleparam: fix doc: hwparam_irq configures an IRQ
2017-07-02 15:37:23 -07:00
libnvdimm, btt: BTT updates for UEFI 2.7 format
2017-06-29 13:50:38 -07:00
bonding: avoid NETDEV_CHANGEMTU event when unregistering slave
2017-07-08 11:23:29 +01:00
net: convert netpoll_info.refcnt from atomic_t to refcount_t
2017-07-01 07:39:08 -07:00
mm, memory_hotplug: split up register_one_node()
2017-07-06 16:24:32 -07:00
mm, memory_hotplug: drop CONFIG_MOVABLE_NODE
2017-07-06 16:24:35 -07:00
nvme_fc/nvmet_fc: revise Create Association descriptor length
2017-07-10 09:09:57 +03:00
nvme: use a single NVME_AQ_DEPTH and relax it to 32
2017-06-28 08:14:13 -06:00
Device properties framework updates for v4.13-rc1
2017-07-10 15:23:45 -07:00
of: make of_fdt_is_compatible() static
2017-06-22 11:14:48 -05:00
of_mdio: move of_mdio_parse_addr to header file
2017-06-13 14:00:16 -04:00
mm, THP, swap: delay splitting THP during swap out
2017-07-06 16:24:31 -07:00
include/linux/page_ref.h: ensure page_ref_unfreeze is ordered against prior accesses
2017-07-10 16:32:31 -07:00
Writeback error handling fixes (pile #2 )
2017-07-07 19:38:17 -07:00
pci-v4.13-changes
2017-07-08 15:51:57 -07:00
PCI: tango: Add Sigma Designs Tango SMP8759 PCIe host bridge support
2017-07-07 13:41:28 -05:00
percpu_counter: Rename __percpu_counter_add to percpu_counter_add_batch
2017-06-20 15:42:32 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-07-05 12:31:59 -07:00
net: phy: Add phy loopback support in net phy framework
2017-07-03 02:01:15 -07:00
platform: Accept const properties
2017-07-03 08:31:43 +02:00
PM / core: Drop run_wake flag from struct dev_pm_info
2017-06-28 01:52:52 +02:00
PM / Domains: Allow overriding the ->xlate() callback
2017-06-13 15:15:08 +02:00
PM / OPP: Add dev_pm_opp_{set|put}_clkname()
2017-06-24 01:41:55 +02:00
PM / core: Drop run_wake flag from struct dev_pm_info
2017-06-28 01:52:52 +02:00
hwmon: (pmbus) move header file out of I2C realm
2017-06-11 17:08:19 -07:00
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
time: introduce {get,put}_itimerspec64
2017-06-25 21:58:46 -04:00
spin loop primitives for busy waiting
2017-06-28 22:49:11 +10:00
device property: Add fwnode_graph_get_port_parent
2017-06-22 02:55:34 +02:00
m68k updates for 4.13
2017-07-03 15:12:52 -07:00
quota: add get_inode_usage callback to transfer multi-inode charges
2017-06-22 11:46:48 -04:00
ras: mark stub functions as 'inline'
2017-06-29 10:48:57 +01:00
locking/refcount: Remove the half-implemented refcount_sub() API
2017-07-02 11:24:36 +02:00
Merge remote-tracking branches 'regmap/topic/1wire', 'regmap/topic/irq' and 'regmap/topic/lzo' into regmap-next
2017-07-03 16:20:28 +01:00
time/posix-timers: Move the compat copyouts to the nanosleep implementations
2017-06-14 00:00:42 +02:00
scatterlist: add sg_zero_buffer() helper
2017-06-15 14:30:14 +02:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-07-09 10:52:16 -07:00
sctp: remove the typedef sctp_init_chunk_t
2017-07-01 09:08:42 -07:00
Merge branch 'stable-4.13' of git://git.infradead.org/users/pcmoore/selinux into next
2017-06-23 11:55:57 +10:00
provide linux/set_memory.h
2017-07-06 16:24:30 -07:00
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-06 20:57:13 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-07-05 12:31:59 -07:00
mm/slub.c: wrap kmem_cache->cpu_partial in config CONFIG_SLUB_CPU_PARTIAL
2017-07-06 16:24:30 -07:00
tls: kernel TLS support
2017-06-15 12:12:40 -04:00
ACPI / PM: Ignore spurious SCI wakeups from suspend-to-idle
2017-06-15 00:55:44 +02:00
mm: swap: provide lru_add_drain_all_cpuslocked()
2017-07-10 16:32:33 -07:00
mm, THP, swap: delay splitting THP during swap out
2017-07-06 16:24:31 -07:00
mm: hwpoison: change PageHWPoison behavior on hugetlb pages
2017-07-10 16:32:30 -07:00
sysctl: add unsigned int range support
2017-07-12 16:26:00 -07:00
t10-pi: Move opencoded contants to common header
2017-07-03 16:56:25 -06:00
copy_{to,from}_user(): consolidate object size checks
2017-06-29 22:21:21 -04:00
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-06 20:57:13 -07:00
time: Clean up CLOCK_MONOTONIC_RAW time handling
2017-06-20 22:13:59 -07:00
tracing: Add support for recording tgid of tasks
2017-06-27 13:30:28 -04:00
tracing: define TRACE_DEFINE_SIZEOF() macro to map sizeof's to their values
2017-06-13 17:10:57 -04:00
TTY/Serial patches for 4.13-rc1
2017-07-03 20:04:16 -07:00
Merge branch 'work.__copy_in_user' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:15:02 -07:00
fix brown paperbag bug in inlined copy_..._iter()
2017-07-10 07:40:49 -04:00
arm64 updates for 4.13:
2017-07-05 17:09:27 -07:00
gcc-plugins: Add the randstruct plugin
2017-06-22 16:15:45 -07:00
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
mm/oom_kill: count global and memory cgroup oom kills
2017-07-06 16:24:35 -07:00
mm: memcontrol: per-lruvec stats infrastructure
2017-07-06 16:24:35 -07:00
vtime, sched/cputime: Remove vtime_account_user()
2017-07-05 09:54:14 +02:00
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
