Daniel Borkmann
555c8a8623
bpf: avoid stack copy and use skb ctx for event output ...
This work addresses a couple of issues bpf_skb_event_output()
helper currently has: i) We need two copies instead of just a
single one for the skb data when it should be part of a sample.
The data can be non-linear and thus needs to be extracted via
bpf_skb_load_bytes() helper first, and then copied once again
into the ring buffer slot. ii) Since bpf_skb_load_bytes()
currently needs to be used first, the helper needs to see a
constant size on the passed stack buffer to make sure BPF
verifier can do sanity checks on it during verification time.
Thus, just passing skb->len (or any other non-constant value)
wouldn't work, but changing bpf_skb_load_bytes() is also not
the proper solution, since the two copies are generally still
needed. iii) bpf_skb_load_bytes() is just for rather small
buffers like headers, since they need to sit on the limited
BPF stack anyway. Instead of working around in bpf_skb_load_bytes(),
this work improves the bpf_skb_event_output() helper to address
all 3 at once.
We can make use of the passed in skb context that we have in
the helper anyway, and use some of the reserved flag bits as
a length argument. The helper will use the new __output_custom()
facility from perf side with bpf_skb_copy() as callback helper
to walk and extract the data. It will pass the data for setup
to bpf_event_output(), which generates and pushes the raw record
with an additional frag part. The linear data used in the first
frag of the record serves as programmatically defined meta data
passed along with the appended sample.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-15 14:23:56 -07:00
MTD updates for v4.7:
2016-05-24 11:00:20 -07:00
libceph: change ceph_osdmap_flag() to take osdc
2016-05-30 23:00:22 +02:00
Merge branch 'topic/xilinx' into for-linus
2016-05-17 10:15:34 +05:30
iio: st_sensors: switch to a threaded interrupt
2016-05-29 20:21:41 +01:00
irqchip/gic-v3: Fix copy+paste mistakes in defines
2016-06-02 17:59:44 +01:00
mfd: da9053: Fix compiler warning message for uninitialised variable
2016-06-30 07:44:23 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-06-30 05:03:36 -04:00
net/mlx5: Introduce bulk reading of flow counters
2016-07-14 13:34:28 -07:00
MMC core:
2016-05-26 09:36:10 -07:00
netfilter: Convert FWINV<[foo]> macros and uses to NF_INVF
2016-07-03 10:55:07 +02:00
netfilter: Convert FWINV<[foo]> macros and uses to NF_INVF
2016-07-03 10:55:07 +02:00
net: dsa: b53: Add support for Broadcom RoboSwitch
2016-06-09 22:21:29 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-06-30 05:03:36 -04:00
regulator: Silence build warnings from regulator_can_change_voltage()
2016-05-17 18:06:18 +01:00
ARM: SoC driver updates for v4.7
2016-05-18 13:14:02 -07:00
rpc: share one xps between all backchannels
2016-06-15 10:32:25 -04:00
USB: EHCI: declare hostpc register as zero-length array
2016-06-24 17:03:12 -07:00
ACPI: bus: add stub acpi_evaluate_dsm() to linux/acpi.h
2016-06-04 21:32:40 -04:00
Merge branch 'for-4.7-zac' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
2016-05-23 17:53:39 -07:00
Merge branch 'stable-4.7' of git://git.infradead.org/users/pcmoore/audit
2016-06-29 15:18:47 -07:00
MIPS: BCM47xx: Move SPROM driver to drivers/firmware/
2016-05-13 14:01:43 +02:00
coredump: fix dumping through pipes
2016-06-07 22:07:09 -04:00
DAX error handling for 4.7
2016-05-26 19:34:26 -07:00
include/linux: apply __malloc attribute
2016-05-19 19:12:14 -07:00
bpf: avoid stack copy and use skb ctx for event output
2016-07-15 14:23:56 -07:00
cgroup: Add cgroup_get_from_fd
2016-07-01 16:30:38 -04:00
clk: Remove CLK_IS_ROOT flag
2016-06-01 14:56:57 -07:00
mm, oom, compaction: prevent from should_compact_retry looping for ever for costly orders
2016-05-20 17:58:30 -07:00
compiler.h: add support for malloc attribute
2016-05-19 19:12:14 -07:00
compiler.h: add support for malloc attribute
2016-05-19 19:12:14 -07:00
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2016-05-23 11:48:48 -07:00
cpuidle: Do not access cpuidle_devices when !CONFIG_CPU_IDLE
2016-06-02 23:05:27 +02:00
cpuset: use static key better and convert to new API
2016-05-19 19:12:14 -07:00
crash_dump: Add vmcore_elf32_check_arch
2016-05-13 14:01:59 +02:00
Filesystem DAX locking for 4.7
2016-05-26 20:00:28 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-06-20 10:41:51 -07:00
debugobjects: insulate non-fixup logic related to static obj from fixup callbacks
2016-05-19 19:12:14 -07:00
driver core update for 4.7-rc1
2016-05-20 21:26:15 -07:00
devpts: Make each mount of devpts an independent filesystem.
2016-06-05 10:36:01 -07:00
dma-buf: headerdoc fixes
2016-05-31 22:12:43 +05:30
efi: Fix for_each_efi_memory_desc_in_map() for empty memmaps
2016-06-03 09:57:35 +02:00
make IS_ERR_VALUE() complain about non-pointer-sized arguments
2016-05-27 16:03:22 -07:00
pnfs: rework LAYOUTGET retry handling
2016-05-17 15:48:12 -04:00
etherdevice.h & bridge: netfilter: Add and use ether_addr_equal_masked
2016-07-01 16:37:06 +02:00
fence: add missing descriptions for fence
2016-05-31 22:17:05 +05:30
bpf: add generic constant blinding for use in jits
2016-05-16 13:49:32 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-05-27 17:14:05 -07:00
FS-Cache: make check_consistency callback return int
2016-06-01 10:29:39 +02:00
fsnotify: avoid spurious EMFILE errors from inotify_init()
2016-05-19 19:12:14 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
2016-05-17 17:11:27 -07:00
include/linux/genhd.h: move to use generic UUID library
2016-05-20 17:58:30 -07:00
printk/nmi: generic solution for safe printk in NMI
2016-05-20 17:58:30 -07:00
<linux/hash.h>: Add support for architecture-specific functions
2016-05-28 15:48:31 -04:00
huge mm: move_huge_pmd does not need new_vma
2016-05-19 19:12:14 -07:00
include/linux/hugetlb.h: use bool instead of int for hugepage_migration_supported()
2016-05-20 17:58:30 -07:00
include/linux/hugetlb*.h: clean up code
2016-05-20 17:58:30 -07:00
mm/hugetlb: is_vm_hugetlb_page() can return bool
2016-05-19 19:12:14 -07:00
ipv6: RFC 4884 partial support for SIT/GRE tunnels
2016-06-18 22:11:39 -07:00
mac80211: Encrypt "Group addressed privacy" action frames
2016-06-30 12:06:20 +02:00
ieee802154: add ieee802154_skb_src_pan helper
2016-07-08 13:23:12 +02:00
net: diag: add missing declarations
2016-06-10 23:22:55 -07:00
fix up initial thread stack pointer vs thread_info confusion
2016-06-24 17:07:33 -07:00
PCI: Identify Enhanced Allocation (EA) BAR Equivalent resources in sysfs
2016-05-16 15:12:02 -05:00
net: vrf: Fix crash when IPv6 is disabled at boot time
2016-06-09 23:34:42 -07:00
irqbypass: Disallow NULL token
2016-05-11 22:37:54 +02:00
isa: Dummy isa_register_driver should return error code
2016-06-17 20:47:11 -07:00
ibft: Expose iBFT acpi header via sysfs
2016-05-16 11:14:29 -04:00
locking/static_key: Fix concurrent static_key_slow_inc()
2016-06-24 08:23:16 +02:00
mm/kasan: add API to check memory regions
2016-05-20 17:58:30 -07:00
mm: mempool: kasan: don't poot mempool objects in quarantine
2016-06-24 17:23:52 -07:00
Staging and IIO driver update for 4.7-rc1
2016-05-20 22:20:48 -07:00
driver core update for 4.7-rc1
2016-05-20 21:26:15 -07:00
s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres()
2016-05-23 17:04:14 -07:00
KVM: Create debugfs dir and stat files for each VM
2016-05-25 16:12:05 +02:00
leds: core: Fix brightness setting upon hardware blinking enabled
2016-06-08 11:47:06 +02:00
Merge branches 'for-4.7/core', 'for-4.7/livepatching-doc' and 'for-4.7/livepatching-ppc64' into for-linus
2016-05-17 12:06:35 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-05-16 14:47:16 -07:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2016-05-19 09:21:36 -07:00
mdio: mux: Enhanced MDIO mux framework for integrated multiplexers
2016-06-10 23:24:53 -07:00
mm: vmscan: reduce size of inactive file list
2016-05-20 17:58:30 -07:00
mm: fix section mismatch warning
2016-05-27 15:23:32 -07:00
tmpfs: preliminary minor tidyups
2016-05-19 19:12:14 -07:00
include/linux: apply __malloc attribute
2016-05-19 19:12:14 -07:00
net: phy: micrel: Add KSZ8041FTL fiber mode support
2016-07-15 11:53:02 -07:00
Revert "mm: make faultaround produce old ptes"
2016-06-24 17:23:52 -07:00
mm: update_lru_size do the __mod_zone_page_state
2016-05-19 19:12:14 -07:00
mm: oom_reaper: remove some bloat
2016-05-26 15:35:44 -07:00
mm fix commmets: if SPARSEMEM, pgdata doesn't have page_ext
2016-05-20 17:58:30 -07:00
devpts: Make each mount of devpts an independent filesystem.
2016-06-05 10:36:01 -07:00
tun: switch to use skb array for tx
2016-07-01 05:32:17 -04:00
sctp: Add GSO support
2016-06-03 19:37:21 -04:00
net: introduce default neigh_construct/destroy ndo calls for L2 upper devices
2016-07-05 09:06:28 -07:00
pnfs: rework LAYOUTGET retry handling
2016-05-17 15:48:12 -04:00
Merge branch 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-05-17 15:05:23 -07:00
NFS: Add COPY nfs operation
2016-05-17 15:47:55 -04:00
NFS client updates for Linux 4.7
2016-05-26 10:33:33 -07:00
nilfs2: fix block comments
2016-05-23 17:04:14 -07:00
include/linux/nodemask.h: create next_node_in() helper
2016-05-19 19:12:14 -07:00
of: add missing const for of_parse_phandle_with_args() in !CONFIG_OF
2016-06-03 07:27:55 -05:00
PCI, of: Move PCI I/O space management to PCI core code
2016-05-12 07:07:42 -05:00
drivers/of: Return allocated memory from of_fdt_unflatten_tree()
2016-05-16 07:22:35 -05:00
of_mdio: select fixed phy support unconditionally
2016-06-28 05:47:52 -04:00
drivers: of: Fix of_pci.h header guard
2016-06-08 08:18:06 -05:00
drivers: of: add definition of early_init_dt_alloc_reserved_memory_arch
2016-06-09 14:38:22 -05:00
signal: make oom_flags a bool
2016-05-23 17:04:14 -07:00
kernel/padata.c: removed unused code
2016-05-19 19:12:14 -07:00
mm: use unsigned long constant for page flags
2016-05-20 17:58:30 -07:00
mm: check the return value of lookup_page_ext for all call sites
2016-06-03 15:06:22 -07:00
mm: rename _count, field of the struct page, to _refcount
2016-05-19 19:12:14 -07:00
mm: tighten fault_in_pages_writeable()
2016-05-20 17:58:30 -07:00
PCI changes for the v4.7 merge window:
2016-05-19 13:10:54 -07:00
printk/nmi: generic solution for safe printk in NMI
2016-05-20 17:58:30 -07:00
perf, events: add non-linear data support for raw records
2016-07-15 14:23:56 -07:00
fs: poll/select/recvmmsg: use timespec64 for timeout events
2016-05-19 19:12:14 -07:00
printk/nmi: flush NMI messages on the system panic
2016-05-20 17:58:30 -07:00
ptr_ring: support resizing multiple queues
2016-07-01 05:32:17 -04:00
pwm: Fix pwm_apply_args()
2016-06-23 18:37:05 +02:00
radix-tree: free up the bottom bit of exceptional entries for reuse
2016-05-20 17:58:30 -07:00
lib/uuid.c: move generate_random_uuid() to uuid.c
2016-05-20 17:58:30 -07:00
Introduce rb_replace_node_rcu()
2016-07-06 10:51:14 +01:00
Introduce rb_replace_node_rcu()
2016-07-06 10:51:14 +01:00
rcu: Suppress sparse warnings for rcu_dereference_raw()
2016-07-06 10:51:14 +01:00
remoteproc: Add additional crash reasons
2016-05-12 15:50:19 -07:00
reservation: add headerdoc comments
2016-05-31 22:12:43 +05:30
reset: TRIVIAL: Add line break at same place for similar APIs
2016-06-29 21:24:53 +02:00
net_sched: add the ability to defer skb freeing
2016-06-15 14:08:34 -07:00
add down_write_killable_nested()
2016-05-26 00:04:58 -04:00
rxrpc: Fix exclusive connection handling
2016-06-22 09:10:00 +01:00
Clarify naming of thread info/stack allocators
2016-06-24 15:09:37 -07:00
sctp: sctp_diag should dump sctp socket type
2016-05-31 11:59:06 -07:00
Merge branch 'work.const-path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-05-17 14:41:03 -07:00
locking/seqcount: Re-fix raw_read_seqcount_latch()
2016-06-03 08:37:25 +02:00
signal: move the "sig < SIGRTMIN" check into siginmask(sig)
2016-05-23 17:04:14 -07:00
skb_array: add wrappers for resizing
2016-07-01 05:32:17 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-07-06 10:35:22 -07:00
include/linux: apply __malloc attribute
2016-05-19 19:12:14 -07:00
mm: SLAB freelist randomization
2016-05-19 19:12:14 -07:00
mm: slub: remove unused virt_to_obj()
2016-05-26 15:35:44 -07:00
sock_diag: do not broadcast raw socket destruction
2016-06-28 09:08:51 -04:00
drivers: net: stmmac: add port selection programming
2016-06-28 08:54:23 -04:00
include/linux: apply __malloc attribute
2016-05-19 19:12:14 -07:00
fs/namei.c: Add hashlen_string() function
2016-05-28 15:42:50 -04:00
mm, oom: rework oom detection
2016-05-20 17:58:30 -07:00
include/linux/syscalls.h: use pid_t instead of int
2016-05-20 17:58:30 -07:00
thermal: add the note for set_trip_temp
2016-06-01 22:25:48 +08:00
time: remove timespec_add_safe()
2016-05-19 19:12:14 -07:00
time: Make settimeofday error checking work again
2016-06-01 21:13:43 +02:00
This includes two new updates for the ftrace infrastructure.
2016-05-18 18:55:19 -07:00
TTY and Serial driver update for 4.7-rc1
2016-05-20 20:57:27 -07:00
signal: make oom_flags a bool
2016-05-23 17:04:14 -07:00
lib/uuid.c: remove FSF address
2016-05-20 17:58:30 -07:00
virtio_net: introduce virtio_net_hdr_{from,to}_skb
2016-06-10 23:03:55 -07:00
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2016-05-23 11:48:48 -07:00
mm, page_alloc: inline zone_statistics
2016-05-19 19:12:14 -07:00
switch ->setxattr() to passing dentry and inode separately
2016-05-27 20:09:16 -04:00
zsmalloc: require GFP in zs_malloc()
2016-05-20 17:58:30 -07:00
