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There's a bug with the world regulatory domain, it
can be updated any time which is different from all
other regdomains that can only be updated once after
a request for them. Fix this by adding a check for
"processed" to the reg_is_valid_request() function
and clear that when doing a request.
While looking at this I also found another locking
bug, last_request is protected by the reg_mutex not
the cfg80211_mutex so the code in nl80211 is racy.
Remove that code as it only tries to prevent an
allocation in an error case, which isn't necessary.
Then the function can also become static and locking
in nl80211 can have a smaller scope.
Also change __set_regdom() to do the checks earlier
and not different for world/other regdomains.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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wiphy_apply_custom_regulatory() doesn't have to hold
the regulatory mutex as it only modifies the given
wiphy with the given regulatory domain, it doesn't
access any global regulatory data.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Many places that currently check that cfg80211_mutex
is held don't actually use any data protected by it.
The functions that need to hold the cfg80211_mutex
are the ones using the cfg80211_regdomain variable,
so add the lock assertion to those and clarify this
in the comments.
The reason for this is that nl80211 uses the regdom
without being able to hold reg_mutex.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The function itself has dual-purpose: it can
retrieve from a given regdomain or from the
globally installed one. Change it to have a
single purpose only: to look up from a given
regdomain. Pass the correct regdomain in the
freq_reg_info() function instead.
This also changes the locking rules for it,
no locking is required any more.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Even if it never happens and is hidden behind the
debug config option, it's completely useless: the
calltrace will only show module loading.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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toupper() only modifies lower-case letters, so
the isalpha() check is redundant; remove it.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Use list_splice_tail_init() and also simplify the locking.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This code is a bit too BUG_ON happy, remove all
instances and while doing so make some code a bit
smarter by passing the right pointer instead of
indices into arrays.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This is pretty much useless since get_wiphy_idx()
always returns true since it's always called with
a valid wiphy pointer.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Instead of treating special error codes specially,
like -EALREADY, introduce a real enum for all the
needed possibilities and use it.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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It would be a major problem if anything were to run
concurrently while the module is being unloaded so
remove the locking that doesn't help anything.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Clean up various things like indentation, extra
parentheses, too many/few line breaks, etc.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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There's no need to unlock before calling
queue_regulatory_request(), so simplify
the function.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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There's no need to test whether a list is
empty or not before iterating.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Use ERR_PTR/IS_ERR to return the result or errors,
also do some code cleanups.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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As the dummy_rule (also renamed from irule) is only
used for output by the reg_rules_intersect() function
there's no need to clear it at all, remove that.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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There's no need to allocate one reg rule more
than will be used, reduce the allocations. The
allocation in nl80211 already doesn't allocate
too much space.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When intersecting rules, we count first to know how many
rules need to be allocated, and then do the intersection
into the allocated array. However, the code doing this
writes past the end of the array because it attempts to
do all intersections. Make it stop when the right number
of rules has been reached.
Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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In a file that's only built when CONFIG_MAC80211_MESH
is defined, having an #ifdef on the same is entirely
pointless, so remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The last fixes re-added the RCU synchronize penalty
on roaming to fix the races. Split up sta_info_flush()
now to get rid of that again, and let managed mode
(and only it) delay the actual destruction.
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When an interface is brought down it must have been
disconnected (or similar) in all modes other than WDS,
so warn if any stations were removed in other modes.
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When all interfaces have been removed, there can't
be any stations left over, so there's no need to
flush again. Remove this, and all code associated
with it, which also simplifies the function.
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Use short slot time in 5GHz for mesh. The performance is
increased from 16.4Mbps to 23.4Mbps for two directly
connected mesh STAs operating in legacy rate using iperf
measurement. Almost similar to the results claimed in IBSS
mode.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[call ieee80211_get_sdata_band() only once]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This allows user-space (wpa_supplicant) to disable
short guard interval (SGI) for 20Mhz. The SGI-40
disable option is already handled.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The maximum MTU shouldn't take the headers into account,
the maximum MSDU size is exactly the maximum MTU.
Signed-off-by: T Krishna Chaitanya <chaitanyatk@posedge.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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When AP's SSID is hidden the BSS can appear several times in
cfg80211's BSS list: once with a zero-length SSID that comes
from the beacon, and once for each SSID from probe reponses.
Since the mac80211 stores its data in ieee80211_bss which
is embedded into cfg80211_bss, mac80211's data will be
duplicated too.
This becomes a problem when a driver needs the dtim_period
since this data exists only in the beacon's instance in
cfg80211 bss table which isn't the instance that is used
when associating.
Remove the DTIM period from the BSS table and track it
explicitly to avoid this problem.
Cc: stable@vger.kernel.org
Tested-by: Efi Tubul <efi.tubul@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This is a very old bug, but there's nothing that prevents the
timer from running while the module is being removed when we
only do del_timer() instead of del_timer_sync().
The timer should normally not be running at this point, but
it's not clearly impossible (or we could just remove this.)
Cc: stable@vger.kernel.org
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Unfortunately, commit b22cfcfcae5b, intended to speed up roaming
by avoiding the synchronize_rcu() broke AP/mesh modes as it moved
some code into that work item that will still call into the driver
at a time where it's no longer expected to handle this: after the
AP or mesh has been stopped.
To fix this problem remove the per-station work struct, maintain a
station cleanup list instead and flush this list when stations are
flushed. To keep this patch smaller for stable, do this when the
stations are flushed (sta_info_flush()). This unfortunately brings
back the original roaming delay; I'll fix that again in a separate
patch.
Also, Ben reported that the original commit could sometimes (with
many interfaces) cause long delays when an interface is set down,
due to blocking on flush_workqueue(). Since we now maintain the
cleanup list, this particular change of the original patch can be
reverted.
Cc: stable@vger.kernel.org [3.7]
Reported-by: Ben Greear <greearb@candelatech.com>
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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The array of rmc_entrys is redundant since only the
list_head is used. Make this an array of list_heads
instead and save ~6k per vif at runtime :D
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Make AP_VLAN type interfaces track the AP master channel
context so they have one assigned for the various lookups.
Don't give them their own refcount etc. since they're just
slaves to the AP master.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
[change to flush stations with AP flush in second loop]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Do not scan on no-IBSS and disabled channels in IBSS mode. Doing this
can trigger Microcode errors on iwlwifi and iwlegacy drivers.
Also rename ieee80211_request_internal_scan() function since it is only
used in IBSS mode and simplify calling it from ieee80211_sta_find_ibss().
This patch should address:
https://bugzilla.redhat.com/show_bug.cgi?id=883414
https://bugzilla.kernel.org/show_bug.cgi?id=49411
Reported-by: Jesse Kahtava <jesse_kahtava@f-m.fm>
Reported-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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This patch adds empty br_mdb_init() and br_mdb_uninit() definitions in
br_private.h to avoid build failure when CONFIG_BRIDGE_IGMP_SNOOPING is not set.
These methods were moved from br_multicast.c to br_netlink.c by
commit 3ec8e9f085bcaef0de1077f555c2c5102c223390
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 63233159fd4e596568f5f168ecb0879b61631d47:
bridge: Do not unregister all PF_BRIDGE rtnl operations
introduced a bug where a removal of a single bridge from a
multi-bridge system would remove MDB netlink handlers.
The handlers should only be removed once all bridges are gone, but
since we don't keep track of the number of bridge interfaces, it's
simpler to do it when the bridge module is unloaded. To make it
consistent, move the registration code into module initialization
code path.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil:
"Two of Alex's patches deal with a race when reseting server
connections for open RBD images, one demotes some non-fatal BUGs to
WARNs, and my patch fixes a protocol feature bit failure path."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
libceph: fix protocol feature mismatch failure path
libceph: WARN, don't BUG on unexpected connection states
libceph: always reset osds when kicking
libceph: move linger requests sooner in kick_requests()
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The bridge link detection should follow the operational state
of the lower device, rather than the carrier bit. This allows devices
like tunnels that are controlled by userspace control plane to work
with bridge STP link management.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Reviewed-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, we return -EINVAL for malformed or wrong BPF filters.
However, this is not done for BPF_S_ANC* operations, which makes it
more difficult to detect if it's actually supported or not by the
BPF machine. Therefore, we should also return -EINVAL if K is within
the SKF_AD_OFF universe and the ancillary operation did not match.
Why exactly is it needed? If tools such as libpcap/tcpdump want to
make use of new ancillary operations (like filtering VLAN in kernel
space), there is currently no sane way to test if this feature /
BPF_S_ANC* op is present or not, since no error is returned. This
patch will make life easier for that and allow for a proper usage
for user space applications.
There was concern, if this patch will break userland. Short answer: Yes
and no. Long answer: It will "break" only for code that calls ...
{ BPF_LD | BPF_(W|H|B) | BPF_ABS, 0, 0, <K> },
... where <K> is in [0xfffff000, 0xffffffff] _and_ <K> is *not* an
ancillary. And here comes the BUT: assuming some *old* code will have
such an instruction where <K> is between [0xfffff000, 0xffffffff] and
it doesn't know ancillary operations, then this will give a
non-expected / unwanted behavior as well (since we do not return the
BPF machine with 0 after a failed load_pointer(), which was the case
before introducing ancillary operations, but load sth. into the
accumulator instead, and continue with the next instruction, for
instance). Thus, user space code would already have been broken by
introducing ancillary operations into the BPF machine per se. Code
that does such a direct load, e.g. "load word at packet offset
0xffffffff into accumulator" ("ld [0xffffffff]") is quite broken,
isn't it? The whole assumption of ancillary operations is that no-one
intentionally calls things like "ld [0xffffffff]" and expect this
word to be loaded from such a packet offset. Hence, we can also safely
make use of this feature testing patch and facilitate application
development. Therefore, at least from this patch onwards, we have
*for sure* a check whether current or in future implemented BPF_S_ANC*
ops are supported in the kernel. Patch was tested on x86_64.
(Thanks to Eric for the previous review.)
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Ani Sinha <ani@aristanetworks.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Sparse detected case where this local function should be static.
It may even allow some compiler optimizations.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Detected by sparse.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix sparse warning about local function that should be static.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use the new per task frag allocator in skb_append_datato_frags(),
to reduce number of frags and page allocator overhead.
Tested:
ifconfig lo mtu 16436
perf record netperf -t UDP_STREAM ; perf report
before :
Throughput: 32928 Mbit/s
51.79% netperf [kernel.kallsyms] [k] copy_user_generic_string
5.98% netperf [kernel.kallsyms] [k] __alloc_pages_nodemask
5.58% netperf [kernel.kallsyms] [k] get_page_from_freelist
5.01% netperf [kernel.kallsyms] [k] __rmqueue
3.74% netperf [kernel.kallsyms] [k] skb_append_datato_frags
1.87% netperf [kernel.kallsyms] [k] prep_new_page
1.42% netperf [kernel.kallsyms] [k] next_zones_zonelist
1.28% netperf [kernel.kallsyms] [k] __inc_zone_state
1.26% netperf [kernel.kallsyms] [k] alloc_pages_current
0.78% netperf [kernel.kallsyms] [k] sock_alloc_send_pskb
0.74% netperf [kernel.kallsyms] [k] udp_sendmsg
0.72% netperf [kernel.kallsyms] [k] zone_watermark_ok
0.68% netperf [kernel.kallsyms] [k] __cpuset_node_allowed_softwall
0.67% netperf [kernel.kallsyms] [k] fib_table_lookup
0.60% netperf [kernel.kallsyms] [k] memcpy_fromiovecend
0.55% netperf [kernel.kallsyms] [k] __udp4_lib_lookup
after:
Throughput: 47185 Mbit/s
61.74% netperf [kernel.kallsyms] [k] copy_user_generic_string
2.07% netperf [kernel.kallsyms] [k] prep_new_page
1.98% netperf [kernel.kallsyms] [k] skb_append_datato_frags
1.02% netperf [kernel.kallsyms] [k] sock_alloc_send_pskb
0.97% netperf [kernel.kallsyms] [k] enqueue_task_fair
0.97% netperf [kernel.kallsyms] [k] udp_sendmsg
0.91% netperf [kernel.kallsyms] [k] __ip_route_output_key
0.88% netperf [kernel.kallsyms] [k] __netif_receive_skb
0.87% netperf [kernel.kallsyms] [k] fib_table_lookup
0.85% netperf [kernel.kallsyms] [k] resched_task
0.78% netperf [kernel.kallsyms] [k] __udp4_lib_lookup
0.77% netperf [kernel.kallsyms] [k] _raw_spin_lock_irqsave
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make carrier writable
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This allows a driver to register change_carrier callback which will be
called whenever user will like to change carrier state. This is useful
for devices like dummy, gre, team and so on.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso says:
====================
The following batch contains Netfilter fixes for 3.8-rc1. They are
a mixture of old bugs that have passed unnoticed (I'll pass these to
stable) and more fresh ones from the previous merge window, they are:
* Fix for MAC address in 6in4 tunnels via NFLOG that results in ulogd
showing up wrong address, from Bob Hockney.
* Fix a comment in nf_conntrack_ipv6, from Florent Fourcot.
* Fix a leak an error path in ctnetlink while creating an expectation,
from Jesper Juhl.
* Fix missing ICMP time exceeded in the IPv6 defragmentation code, from
Haibo Xi.
* Fix inconsistent handling of routing changes in MASQUERADE for the
new connections case, from Andrew Collins.
* Fix a missing skb_reset_transport in ip[6]t_REJECT that leads to
crashes in the ixgbe driver (since it seems to access the transport
header with TSO enabled), from Mukund Jampala.
* Recover obsoleted NOTRACK target by including it into the CT and spot
a warning via printk about being obsoleted. Many people don't check the
scheduled to be removal file under Documentation, so we follow some
less agressive approach to kill this in a year or so. Spotted by Florian
Westphal, patch from myself.
* Fix race condition in xt_hashlimit that allows to create two or more
entries, from myself.
* Fix crash if the CT is used due to the recently added facilities to
consult the dying and unconfirmed conntrack lists, from myself.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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There's no need to test whether a (delayed) work item in pending
before queueing, flushing or cancelling it. Most uses are unnecessary
and quite a few of them are buggy.
Remove unnecessary pending tests from rfkill. Only compile
tested.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
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We should not set con->state to CLOSED here; that happens in
ceph_fault() in the caller, where it first asserts that the state
is not yet CLOSED. Avoids a BUG when the features don't match.
Since the fail_protocol() has become a trivial wrapper, replace
calls to it with direct calls to reset_connection().
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
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A number of assertions in the ceph messenger are implemented with
BUG_ON(), killing the system if connection's state doesn't match
what's expected. At this point our state model is (evidently) not
well understood enough for these assertions to trigger a BUG().
Convert all BUG_ON(con->state...) calls to be WARN_ON(con->state...)
so we learn about these issues without killing the machine.
We now recognize that a connection fault can occur due to a socket
closure at any time, regardless of the state of the connection. So
there is really nothing we can assert about the state of the
connection at that point so eliminate that assertion.
Reported-by: Ugis <ugis22@gmail.com>
Tested-by: Ugis <ugis22@gmail.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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When ceph_osdc_handle_map() is called to process a new osd map,
kick_requests() is called to ensure all affected requests are
updated if necessary to reflect changes in the osd map. This
happens in two cases: whenever an incremental map update is
processed; and when a full map update (or the last one if there is
more than one) gets processed.
In the former case, the kick_requests() call is followed immediately
by a call to reset_changed_osds() to ensure any connections to osds
affected by the map change are reset. But for full map updates
this isn't done.
Both cases should be doing this osd reset.
Rather than duplicating the reset_changed_osds() call, move it into
the end of kick_requests().
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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The kick_requests() function is called by ceph_osdc_handle_map()
when an osd map change has been indicated. Its purpose is to
re-queue any request whose target osd is different from what it
was when it was originally sent.
It is structured as two loops, one for incomplete but registered
requests, and a second for handling completed linger requests.
As a special case, in the first loop if a request marked to linger
has not yet completed, it is moved from the request list to the
linger list. This is as a quick and dirty way to have the second
loop handle sending the request along with all the other linger
requests.
Because of the way it's done now, however, this quick and dirty
solution can result in these incomplete linger requests never
getting re-sent as desired. The problem lies in the fact that
the second loop only arranges for a linger request to be sent
if it appears its target osd has changed. This is the proper
handling for *completed* linger requests (it avoids issuing
the same linger request twice to the same osd).
But although the linger requests added to the list in the first loop
may have been sent, they have not yet completed, so they need to be
re-sent regardless of whether their target osd has changed.
The first required fix is we need to avoid calling __map_request()
on any incomplete linger request. Otherwise the subsequent
__map_request() call in the second loop will find the target osd
has not changed and will therefore not re-send the request.
Second, we need to be sure that a sent but incomplete linger request
gets re-sent. If the target osd is the same with the new osd map as
it was when the request was originally sent, this won't happen.
This can be fixed through careful handling when we move these
requests from the request list to the linger list, by unregistering
the request *before* it is registered as a linger request. This
works because a side-effect of unregistering the request is to make
the request's r_osd pointer be NULL, and *that* will ensure the
second loop actually re-sends the linger request.
Processing of such a request is done at that point, so continue with
the next one once it's been moved.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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