| Age | Commit message (Collapse) | Author |
|---|
|
At the moment, there are some minimal register differences between
VSC7514 Ocelot and VSC9959 Felix. To be precise, the PCS1G registers are
missing from Felix because it was integrated with an NXP PCS.
But with VSC9953 Seville (not yet introduced), the register differences
are more pronounced. The MAC registers are located at different offsets
within the DEV_GMII target. So we need to refactor the driver to keep a
regmap even for per-port registers. The callers of the ocelot_port_readl
and ocelot_port_writel were kept unchanged, only the implementation is
now more generic.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Dereferencing the reporter after it was destroyed in order to unlock the
reporters lock results in a use-after-free [1].
Fix this by storing a pointer to the lock in a local variable before
destroying the reporter.
[1]
==================================================================
BUG: KASAN: use-after-free in devlink_health_reporter_destroy+0x15c/0x1b0 net/core/devlink.c:5476
Read of size 8 at addr ffff8880650fd020 by task syz-executor.1/904
CPU: 0 PID: 904 Comm: syz-executor.1 Not tainted 5.8.0-rc2+ #35
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xf6/0x16e lib/dump_stack.c:118
print_address_description.constprop.0+0x1c/0x250 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
devlink_health_reporter_destroy+0x15c/0x1b0 net/core/devlink.c:5476
nsim_dev_health_exit+0x8b/0xe0 drivers/net/netdevsim/health.c:317
nsim_dev_reload_destroy+0x7f/0x110 drivers/net/netdevsim/dev.c:1134
nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:712
devlink_reload+0xc6/0x3b0 net/core/devlink.c:2952
devlink_nl_cmd_reload+0x2f1/0x7c0 net/core/devlink.c:2987
genl_family_rcv_msg_doit net/netlink/genetlink.c:691 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:736 [inline]
genl_rcv_msg+0x611/0x9d0 net/netlink/genetlink.c:753
netlink_rcv_skb+0x152/0x440 net/netlink/af_netlink.c:2469
genl_rcv+0x24/0x40 net/netlink/genetlink.c:764
netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
netlink_unicast+0x53a/0x750 net/netlink/af_netlink.c:1329
netlink_sendmsg+0x850/0xd90 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0x150/0x190 net/socket.c:672
____sys_sendmsg+0x6d8/0x840 net/socket.c:2363
___sys_sendmsg+0xff/0x170 net/socket.c:2417
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2450
do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4748ad
Code: Bad RIP value.
RSP: 002b:00007fd0358adc38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf00 RCX: 00000000004748ad
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000004d1a4b R14: 00007fd0358ae6b4 R15: 00007fd0358add80
Allocated by task 539:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc mm/kasan/common.c:494 [inline]
__kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:467
kmalloc include/linux/slab.h:555 [inline]
kzalloc include/linux/slab.h:669 [inline]
__devlink_health_reporter_create+0x91/0x2f0 net/core/devlink.c:5359
devlink_health_reporter_create+0xa1/0x170 net/core/devlink.c:5431
nsim_dev_health_init+0x95/0x3a0 drivers/net/netdevsim/health.c:279
nsim_dev_probe+0xb1e/0xeb0 drivers/net/netdevsim/dev.c:1086
really_probe+0x287/0x6d0 drivers/base/dd.c:525
driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:701
__device_attach_driver+0x21e/0x290 drivers/base/dd.c:807
bus_for_each_drv+0x161/0x1e0 drivers/base/bus.c:431
__device_attach+0x21a/0x360 drivers/base/dd.c:873
bus_probe_device+0x1e6/0x290 drivers/base/bus.c:491
device_add+0xaf2/0x1b00 drivers/base/core.c:2680
nsim_bus_dev_new drivers/net/netdevsim/bus.c:336 [inline]
new_device_store+0x374/0x590 drivers/net/netdevsim/bus.c:215
bus_attr_store+0x75/0xa0 drivers/base/bus.c:122
sysfs_kf_write+0x113/0x170 fs/sysfs/file.c:138
kernfs_fop_write+0x25d/0x480 fs/kernfs/file.c:315
__vfs_write+0x7c/0x100 fs/read_write.c:495
vfs_write+0x265/0x5e0 fs/read_write.c:559
ksys_write+0x12d/0x250 fs/read_write.c:612
do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Freed by task 904:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
kasan_set_free_info mm/kasan/common.c:316 [inline]
__kasan_slab_free+0x12c/0x170 mm/kasan/common.c:455
slab_free_hook mm/slub.c:1474 [inline]
slab_free_freelist_hook mm/slub.c:1507 [inline]
slab_free mm/slub.c:3072 [inline]
kfree+0xe6/0x320 mm/slub.c:4063
devlink_health_reporter_free net/core/devlink.c:5449 [inline]
devlink_health_reporter_put+0xb7/0xf0 net/core/devlink.c:5456
__devlink_health_reporter_destroy net/core/devlink.c:5463 [inline]
devlink_health_reporter_destroy+0x11b/0x1b0 net/core/devlink.c:5475
nsim_dev_health_exit+0x8b/0xe0 drivers/net/netdevsim/health.c:317
nsim_dev_reload_destroy+0x7f/0x110 drivers/net/netdevsim/dev.c:1134
nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:712
devlink_reload+0xc6/0x3b0 net/core/devlink.c:2952
devlink_nl_cmd_reload+0x2f1/0x7c0 net/core/devlink.c:2987
genl_family_rcv_msg_doit net/netlink/genetlink.c:691 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:736 [inline]
genl_rcv_msg+0x611/0x9d0 net/netlink/genetlink.c:753
netlink_rcv_skb+0x152/0x440 net/netlink/af_netlink.c:2469
genl_rcv+0x24/0x40 net/netlink/genetlink.c:764
netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
netlink_unicast+0x53a/0x750 net/netlink/af_netlink.c:1329
netlink_sendmsg+0x850/0xd90 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0x150/0x190 net/socket.c:672
____sys_sendmsg+0x6d8/0x840 net/socket.c:2363
___sys_sendmsg+0xff/0x170 net/socket.c:2417
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2450
do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff8880650fd000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 32 bytes inside of
512-byte region [ffff8880650fd000, ffff8880650fd200)
The buggy address belongs to the page:
page:ffffea0001943f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880650ff800 head:ffffea0001943f00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x100000000010200(slab|head)
raw: 0100000000010200 ffffea0001a06a08 ffffea00010ad308 ffff88806c402500
raw: ffff8880650ff800 0000000000100009 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880650fcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880650fcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880650fd000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880650fd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880650fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Fixes: 3c5584bf0a04 ("devlink: Rework devlink health reporter destructor")
Fixes: 15c724b997a8 ("devlink: Add devlink health port reporters API")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
PHYLIB is not selected by mdio-mscc-miim but it uses mdio devres helpers.
Explicitly select MDIO_DEVRES in this driver's Kconfig entry.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 1814cff26739 ("net: phy: add a Kconfig option for mdio_devres")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.
Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The sparse tool complains as follows:
net/core/dev.c:5594:1: warning:
symbol '__pcpu_scope_flush_works' was not declared. Should it be static?
'flush_works' is not used outside of dev.c, so marks
it static.
Fixes: 41852497a9205 ("net: batch calls to flush_all_backlogs()")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Petr Machata says:
====================
mlxsw: Add support for buffer drops mirroring
This set offloads the recently introduced qevent infrastructure in TC and
allows mlxsw to support mirroring of packets that were dropped due to
buffer related reasons (e.g., early drops) during forwarding.
Up until now mlxsw only supported mirroring that was either triggered by
per-port triggers (i.e., via matchall) or by the policy engine (i.e.,
via flower). Packets that are dropped due to buffer related reasons are
mirrored using a third type of trigger, a global trigger.
Global triggers are bound once to a mirroring (SPAN) agent and enabled
on a per-{port, TC} basis. This allows users, for example, to request
that only packets that were early dropped on a specific netdev to be
mirrored.
Patch set overview:
Patch #1 extends flow_block_offload and indirect offload structure to pass
a scheduler instead of a netdevice. That is necessary, because binding type
and netdevice are not a unique identifier of the block anymore.
Patches #2-#3 add the required registers to support above mentioned
functionality.
Patches #4-#6 gradually add support for global mirroring triggers.
Patch #7 adds support for enablement of global mirroring triggers.
Patches #8-#11 are cleanups in the flow offload code and shuffle some
code around to make the qevent offload easier.
Patch #12 implements offload of RED early_drop qevent.
Patch #13 extends the RED selftest for offloaded datapath to cover
early_drop qevent.
v2:
- Patch #1:
- In struct flow_block_indr, track both sch and dev.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Add a selftest for offloading a mirror action attached to the block
associated with RED early_drop qevent.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The RED qevents early_drop and mark can be offloaded under the following
fairly strict conditions:
- At most one filter is configured at the qevent block
- The protocol is "any"
- The classifier is matchall
- The action is trap, sample, or mirror with the same conditions as
with other SPAN offloads
- The hw_counters type is none
In this patchset, implement offload of mirror for early_drop qevent.
The ECN trigger is currently not implemented in the FW and therefore
the mark qevent is not supported.
The qevent notifications look exactly like regular block binding
notifications with a binder type that identifies them as qevents.
Therefore the details of processing this binding are fairly similar
to the matchall offload.
struct flow_block_offload.sch points at the qdisc in question. Use it to
figure out if the qdisc is offloaded at all and what TC it configures.
Bounce bindings on not-offloaded qdiscs.
Individual bindings are kept in a list so that several qevents can share
the same block and all binding points get configured as the configured
filters change.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Two RED qevents have been introduced recently. From the point of view of a
driver, qevents are simply blocks with unusual binder types. However they
need to be handled by different logic than ACL-like flows.
Thus rename mlxsw_sp_setup_tc_block() to mlxsw_sp_setup_tc_block_clsact()
and move the binder-type dispatch from there to spectrum.c into a new
function of the original name. The new dispatcher is easier to extend with
new binder types.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
A following patch introduces offloading of filters attached to blocks bound
to the RED tail_drop qevent. The only classifier that mlxsw will permit in
this role is matchall. mlxsw currently offloads matchall filters used with
clsact qdisc. The data structures used for that offload will come handy for
the qevent offload as well. Publish them in spectrum.h.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The field "dev" in struct mlxsw_sp_flow_block_binding is not used. Drop it.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
No clean-up is performed at the target label of this goto. Convert it to a
direct return.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
While the binding of global mirroring triggers to a SPAN agent is
global, packets are only mirrored if they belong to a port and TC on
which the trigger was enabled. This allows, for example, to mirror
packets that were tail-dropped on a specific netdev.
Implement the operations that allow to enable / disable a global
mirroring trigger on a specific port and TC.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Global mirroring triggers are triggers that are only keyed by their
trigger, as opposed to per-port triggers, which are keyed by their
trigger and port.
Such triggers allow mirroring packets that were tail/early dropped or
ECN marked to a SPAN agent.
Implement the previously added trigger operations for these global
triggers. Since such triggers are only supported from Spectrum-2
onwards, have the Spectrum-1 operations return an error.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Currently, a SPAN agent can only be bound to a per-port trigger where
the trigger is either an incoming packet (INGRESS) or an outgoing packet
(EGRESS) to / from the port.
The subsequent patch will introduce the concept of global mirroring
triggers. The binding / unbinding of global triggers is different than
that of per-port triggers. Such triggers also need to be enabled /
disabled on a per-{port, TC} basis and are only supported from
Spectrum-2 onwards.
Add trigger operations that allow us to abstract these differences. Only
implement the operations for per-port triggers. Next patch will
implement the operations for global triggers.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The per-ASIC SPAN operations are relevant to the SPAN module and
therefore should be implemented there and not in the main driver file.
Move them.
These operations will be extended later on.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This register is used for global port analyzer configurations.
Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This register is used to configure the mirror enable for different
mirror reasons.
Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Previously, shared blocks were only relevant for the pseudo-qdiscs ingress
and clsact. Recently, a qevent facility was introduced, which allows to
bind blocks to well-defined slots of a qdisc instance. RED in particular
got two qevents: early_drop and mark. Drivers that wish to offload these
blocks will be sent the usual notification, and need to know which qdisc it
is related to.
To that end, extend flow_block_offload with a "sch" pointer, and initialize
as appropriate. This prompts changes in the indirect block facility, which
now tracks the scheduler in addition to the netdevice. Update signatures of
several functions similarly.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Andrew Lunn says:
====================
net simple kerneldoc fixes
This is a collection of simple kerneldoc fixes. They are all low
hanging fruit, were not real understanding of the code was needed.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Jon Maloy <jmaloy@redhat.com>
Cc: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Fix the warning "Function parameter or member 'inode' not described in
'__sock_release'' due to the kerneldoc being placed before
__sock_release() not sock_release(), which does not take an inode
parameter.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Paul Moore <paul@paul-moore.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Jozsef Kadlecsik <kadlec@netfilter.org>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Paul Moore <paul@paul-moore.com>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple fixes which require no deep knowledge of the code.
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This commit affects comments (and in one case, whitespace) only.
Throughout the IPA code, return statements are documented using
"@Return:", whereas they should use "Return:" instead. Fix these
mistakes.
In function definitions, some parameters are missing their comment
to describe them. And in structure definitions, some fields are
missing their comment to describe them. Add these missing
descriptions.
Some arguments changed name and type along the way, but their
descriptions were not updated (an endpoint pointer is now used in
many places that previously used an endpoint ID). Fix these
incorrect parameter descriptions.
In the description for the ipa_clock structure, one field had a
semicolon instead of a colon in its description. Fix this.
Add a missing function description for ipa_gsi_endpoint_data_empty().
All of these issues were identified when building with "W=1".
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Andrii Nakryiko says:
====================
Fix bpftool logic of stripping away const/volatile modifiers for all global
variables during BPF skeleton generation. See patch #1 for details on when
existing logic breaks and why it's important. Support special .strip_mods=true
mode in btf_dump__emit_type_decl.
Recent example of when this has caused problems can be found in [0].
[0] https://github.com/iovisor/bcc/pull/2994#issuecomment-650588533
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
|
|
Reliably remove all the type modifiers from read-only (.rodata) global
variable definitions, including cases of inner field const modifiers and
arrays of const values.
Also modify one of selftests to ensure that const volatile struct doesn't
prevent user-space from modifying .rodata variable.
Fixes: 985ead416df3 ("bpftool: Add skeleton codegen command")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200713232409.3062144-3-andriin@fb.com
|
|
One important use case when emitting const/volatile/restrict is undesirable is
BPF skeleton generation of DATASEC layout. These are further memory-mapped and
can be written/read from user-space directly.
For important case of .rodata variables, bpftool strips away first-level
modifiers, to make their use on user-space side simple and not requiring extra
type casts to override compiler complaining about writing to const variables.
This logic works mostly fine, but breaks in some more complicated cases. E.g.:
const volatile int params[10];
Because in BTF it's a chain of ARRAY -> CONST -> VOLATILE -> INT, bpftool
stops at ARRAY and doesn't strip CONST and VOLATILE. In skeleton this variable
will be emitted as is. So when used from user-space, compiler will complain
about writing to const array. This is problematic, as also mentioned in [0].
To solve this for arrays and other non-trivial cases (e.g., inner
const/volatile fields inside the struct), teach btf_dump to strip away any
modifier, when requested. This is done as an extra option on
btf_dump__emit_type_decl() API.
Reported-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200713232409.3062144-2-andriin@fb.com
|
|
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.
Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Alan Maguire says:
====================
Steven suggested a way to resolve the appearance of the warning banner
that appears as a result of using trace_printk() in BPF [1].
Applying the patch and testing reveals all works as expected; we
can call bpf_trace_printk() and see the trace messages in
/sys/kernel/debug/tracing/trace_pipe and no banner message appears.
Also add a test prog to verify basic bpf_trace_printk() helper behaviour.
Changes since v2:
- fixed stray newline in bpf_trace_printk(), use sizeof(buf)
rather than #defined value in vsnprintf() (Daniel, patch 1)
- Daniel also pointed out that vsnprintf() returns 0 on error rather
than a negative value; also turns out that a null byte is not
appended if the length of the string written is zero, so to fix
for cases where the string to be traced is zero length we set the
null byte explicitly (Daniel, patch 1)
- switch to using getline() for retrieving lines from trace buffer
to ensure we don't read a portion of the search message in one
read() operation and then fail to find it (Andrii, patch 2)
Changes since v1:
- reorder header inclusion in bpf_trace.c (Steven, patch 1)
- trace zero-length messages also (Andrii, patch 1)
- use a raw spinlock to ensure there are no issues for PREMMPT_RT
kernels when using bpf_trace_printk() within other raw spinlocks
(Steven, patch 1)
- always enable bpf_trace_printk() tracepoint when loading programs
using bpf_trace_printk() as this will ensure that a user disabling
that tracepoint will not prevent tracing output from being logged
(Steven, patch 1)
- use "tp/raw_syscalls/sys_enter" and a usleep(1) to trigger events
in the selftest ensuring test runs faster (Andrii, patch 2)
[1] https://lore.kernel.org/r/20200628194334.6238b933@oasis.local.home
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
|
|
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.
Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Simple selftests that verifies bpf_trace_printk() returns a sensible
value and tracing messages appear.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/1594641154-18897-3-git-send-email-alan.maguire@oracle.com
|
|
The bpf helper bpf_trace_printk() uses trace_printk() under the hood.
This leads to an alarming warning message originating from trace
buffer allocation which occurs the first time a program using
bpf_trace_printk() is loaded.
We can instead create a trace event for bpf_trace_printk() and enable
it in-kernel when/if we encounter a program using the
bpf_trace_printk() helper. With this approach, trace_printk()
is not used directly and no warning message appears.
This work was started by Steven (see Link) and finished by Alan; added
Steven's Signed-off-by with his permission.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/r/20200628194334.6238b933@oasis.local.home
Link: https://lore.kernel.org/bpf/1594641154-18897-2-git-send-email-alan.maguire@oracle.com
|
|
Don't emit warning that bpftool was built without PID iterator support. This
error garbles JSON output of otherwise perfectly valid show commands.
Reported-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200710232605.20918-1-andriin@fb.com
|
