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Pull networking fixes from David Miller:
1) Receive packet length needs to be adjust by 2 on RX to accomodate
the two padding bytes in altera_tse driver. From Vlastimil Setka.
2) If rx frame is dropped due to out of memory in macb driver, we leave
the receive ring descriptors in an undefined state. From Punnaiah
Choudary Kalluri
3) Some netlink subsystems erroneously signal NLM_F_MULTI. That is
only for dumps. Fix from Nicolas Dichtel.
4) Fix mis-use of raw rt->rt_pmtu value in ipv4, one must always go via
the ipv4_mtu() helper. From Herbert Xu.
5) Fix null deref in bridge netfilter, and miscalculated lengths in
jump/goto nf_tables verdicts. From Florian Westphal.
6) Unhash ping sockets properly.
7) Software implementation of BPF divide did 64/32 rather than 64/64
bit divide. The JITs got it right. Fix from Alexei Starovoitov.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (30 commits)
ipv4: Missing sk_nulls_node_init() in ping_unhash().
net: fec: Fix RGMII-ID mode
net/mlx4_en: Schedule napi when RX buffers allocation fails
netxen_nic: use spin_[un]lock_bh around tx_clean_lock
net/mlx4_core: Fix unaligned accesses
mlx4_en: Use correct loop cursor in error path.
cxgb4: Fix MC1 memory offset calculation
bnx2x: Delay during kdump load
net: Fix Kernel Panic in bonding driver debugfs file: rlb_hash_table
net: dsa: Fix scope of eeprom-length property
net: macb: Fix race condition in driver when Rx frame is dropped
hv_netvsc: Fix a bug in netvsc_start_xmit()
altera_tse: Correct rx packet length
mlx4: Fix tx ring affinity_mask creation
tipc: fix problem with parallel link synchronization mechanism
tipc: remove wrong use of NLM_F_MULTI
bridge/nl: remove wrong use of NLM_F_MULTI
bridge/mdb: remove wrong use of NLM_F_MULTI
net: sched: act_connmark: don't zap skb->nfct
trivial: net: systemport: bcmsysport.h: fix 0x0x prefix
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If we don't do that, then the poison value is left in the ->pprev
backlink.
This can cause crashes if we do a disconnect, followed by a connect().
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Wen Xu <hotdog3645@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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RGMII-ID uses an internal delay within the transmitter or receiver. This
feature is phy specific. The rest of the communication is normal RGMII.
So the fec driver has to check for all RGMII modes, not only
'PHY_INTERFACE_MODE_RGMII'.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When system is out of memory, refilling of RX buffers fails while
the driver continue to pass the received packets to the kernel stack.
At some point, when all RX buffers deplete, driver may fall into a
sleep, and not recover when memory for new RX buffers is once again
availible. This is because hardware does not have valid descriptors,
so no interrupt will be generated for the driver to return to work
in napi context. Fix it by schedule the napi poll function from
stats_task delayed workqueue, as long as the allocations fail.
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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While testing this driver with DEBUG_LOCKDEP and DEBUG_SPINLOCK
enabled did not produce any traces, it would be more prudent in the
case of tx_clean_lock to use spin_[un]lock_bh, since this lock is
manipulated in both the process and softirq contexts.
This patch was tested for functionality and regressions with netperf
and DEBUG_LOCKDEP and DEBUG_SPINLOCK enabled.
Signed-off-by: Tony Camuso <tcamuso@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Addresses the following kernel logs seen during boot:
Kernel unaligned access at TPC[100ee150] mlx4_QUERY_HCA+0x80/0x248 [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Kernel unaligned access at TPC[100f071c] mlx4_QUERY_ADAPTER+0x100/0x12c [mlx4_core]
Signed-off-by: David Ahern <david.ahern@oracle.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Fixes: 9e311e7 ("net/mlx4_en: Use affinity hint")
Acked-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 6559a7e8296002b4 ("cxgb4: Cleanup macros so they follow the same
style and look consistent") introduced a regression where reading MC1
memory in adapters where MC0 isn't present or MC0 size is not equal to MC1
size caused the adapter to crash due to incorrect computation of memoffset.
Fix is to read the size of MC0 instead of MC1 for offset calculation
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In a kdump environment interfaces might be re-loaded without a proper
unload sequence in the previous running kernel.
bnx2x management FW and driver maintains a `pulse' that notifies the FW
that the driver is still up and running.
Driver load on the kdump kernel should be performed only after the pulse
has been out-of-sync long enough for the management FW to identify that
the driver has crashed, on which point it will perform some necessary
cleanup of the HW.
In today's distros kdump loading is quite fast, sometimes too fast for our
FW to get out-of-sync. This patch delays the bnx2x's probe during kdump
to allow a proper re-load on the kdump kernel.
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch fixes a Kernel Panic in bonding driver debugfs file: rlb_hash_table.
$> modprobe bonding mode=6
$> cat /sys/kernel/debug/bonding/bond0/rlb_hash_table
This will crash the kernel. The struct alb_bond_info is initialized only when
the bonding interface is initialized (ip link set bond0 up) and not at the time
it is allocated. If we try to read the table before that, it'll result in a
kernel panic.
The patch applies against both net and net-next
Signed-off-by: Vishwanath Pai <vpai@akamai.com>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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eeprom-length is a switch property, not a dsa property, and thus
needs to be attached to the switch node, not to the dsa node.
Reported-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 6793abb4e849 ("net: dsa: Add support for switch EEPROM access")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Under heavy Rx load, observed that the Hw is updating the USED bit
and it is not updating the received frame status to the BD control
field. This could be lack of resources for processing the BDs at high
data rates. Driver drops the frame associated with this BD but not
clearing the USED bit. So, this is causing hang condition as Hw
expects USED bit to be cleared for this BD.
Signed-off-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit b08cc79155fc26d0d112b1470d1ece5034651a4b eliminated memory
allocation in the packet send path:
"hv_netvsc: Eliminate memory allocation in the packet send path
The network protocol used to communicate with the host is the remote ndis (rndis)
protocol. We need to decorate each outgoing packet with a rndis header and
additional rndis state (rndis per-packet state). To manage this state, we
currently allocate memory in the transmit path. Eliminate this allocation by
requesting additional head room in the skb."
This commit introduced a bug since it did not account for the case if the skb
was cloned. Fix this bug.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Altera TSE MAC rx DMA transfer starts with the 2 additional bytes for IP
payload alignment. This patch fixes tse_rx() function loop which reads DMA
rx status and extracts packet length from it. Status signalises a whole DMA
transfer length, which is 2 bytes longer than the packet itself.
Signed-off-by: Vlastimil Setka <setka@vsis.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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By default, the number of tx queues is limited by the number of online cpus
in mlx4_en_get_profile(). However, this limit no longer holds after the
ethtool .set_channels method has been called. In that situation, the driver
may access invalid bits of certain cpumask variables when queue_index >=
nr_cpu_ids.
Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Acked-by: Ido Shamay <idos@mellanox.com>
Fixes: d03a68f ("net/mlx4_en: Configure the XPS queue mapping on driver load")
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, we try to accumulate arrived packets in the links's
'deferred' queue during the parallel link syncronization phase.
This entails two problems:
- With an unlucky combination of arriving packets the algorithm
may go into a lockstep with the out-of-sequence handling function,
where the synch mechanism is adding a packet to the deferred queue,
while the out-of-sequence handling is retrieving it again, thus
ending up in a loop inside the node_lock scope.
- Even if this is avoided, the link will very often send out
unnecessary protocol messages, in the worst case leading to
redundant retransmissions.
We fix this by just dropping arriving packets on the upcoming link
during the synchronization phase, thus relying on the retransmission
protocol to resolve the situation once the two links have arrived to
a synchronized state.
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact,
it is sent only at the end of a dump.
Libraries like libnl will wait forever for NLMSG_DONE.
Fixes: 35b9dd7607f0 ("tipc: add bearer get/dump to new netlink api")
Fixes: 7be57fc69184 ("tipc: add link get/dump to new netlink api")
Fixes: 46f15c6794fb ("tipc: add media get/dump to new netlink api")
CC: Richard Alpe <richard.alpe@ericsson.com>
CC: Jon Maloy <jon.maloy@ericsson.com>
CC: Ying Xue <ying.xue@windriver.com>
CC: tipc-discussion@lists.sourceforge.net
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact,
it is sent only at the end of a dump.
Libraries like libnl will wait forever for NLMSG_DONE.
Fixes: e5a55a898720 ("net: create generic bridge ops")
Fixes: 815cccbf10b2 ("ixgbe: add setlink, getlink support to ixgbe and ixgbevf")
CC: John Fastabend <john.r.fastabend@intel.com>
CC: Sathya Perla <sathya.perla@emulex.com>
CC: Subbu Seetharaman <subbu.seetharaman@emulex.com>
CC: Ajit Khaparde <ajit.khaparde@emulex.com>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: intel-wired-lan@lists.osuosl.org
CC: Jiri Pirko <jiri@resnulli.us>
CC: Scott Feldman <sfeldma@gmail.com>
CC: Stephen Hemminger <stephen@networkplumber.org>
CC: bridge@lists.linux-foundation.org
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact,
it is sent only at the end of a dump.
Libraries like libnl will wait forever for NLMSG_DONE.
Fixes: 37a393bc4932 ("bridge: notify mdb changes via netlink")
CC: Cong Wang <amwang@redhat.com>
CC: Stephen Hemminger <stephen@networkplumber.org>
CC: bridge@lists.linux-foundation.org
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This action is meant to be passive, i.e. we should not alter
skb->nfct: If nfct is present just leave it alone.
Compile tested only.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix the 0x0x prefix in an integer constant.
In this case, while at it, also fix a typo (s/unitcast/unicast/).
Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix the 0x0x prefix in an integer constant.
Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: Jay Cliburn <jcliburn@gmail.com>
Cc: Chris Snook <chris.snook@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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Michal Schmidt says:
====================
bnx2x: minor cleanups related to TPA bits
I noticed some simplification possibilities while looking into the bug
fixed by "bnx2x: really disable TPA if 'disable_tpa' is set'.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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These flags are redundant with dev->features. Remove them.
Just make sure to set dev->features ourselves in bnx2x_set_features()
before performing the reload of the card.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It is simpler to have the TPA mode as one three-state variable.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If disable_tpa is set, remove NETIF_F_LRO from hw_features, so ethtool sees
it as "off [fixed]".
Note that setting the NETIF_F_LRO bit in dev->features in the 'else'
branch is not needed, because the bit was already set by
bnx2x_init_dev().
Then the check for disable_tpa in in bnx2x_fix_features() becomes unnecessary.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1. Introduce netif-msg to netvsc to control debug logging output
and keep msg_enable in netvsc_device_context so that it is
kept persistently.
2. Only call dump_rndis_message() when NETIF_MSG_RX_ERR or above
is specified in netvsc module debug param.
In non-debug mode, in current code, dump_rndis_message() will not
dump anything but it still initialize some local variables and
process the switch logic which is unnecessary, especially in
high network throughput situation.
Signed-off-by: Simon Xiao <sixiao@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The commit 3cdaa5be9e81a914e633a6be7b7d2ef75b528562 ("ipv4: Don't
increase PMTU with Datagram Too Big message") broke PMTU in cases
where the rt_pmtu value has expired but is smaller than the new
PMTU value.
This obsolete rt_pmtu then prevents the new PMTU value from being
installed.
Fixes: 3cdaa5be9e81 ("ipv4: Don't increase PMTU with Datagram Too Big message")
Reported-by: Gerd v. Egidy <gerd.von.egidy@intra2net.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for your net tree,
they are:
1) Fix a crash in nf_tables when dictionaries are used from the ruleset,
due to memory corruption, from Florian Westphal.
2) Fix another crash in nf_queue when used with br_netfilter. Also from
Florian.
Both fixes are related to new stuff that got in 4.0-rc.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Might not have an outdev yet. We'll oops when iface goes down while skbs
are still nfqueue'd:
RIP: 0010:[<ffffffff81422a2f>] [<ffffffff81422a2f>] dev_cmp+0x4f/0x80
nfqnl_rcv_dev_event+0xe2/0x150
notifier_call_chain+0x53/0xa0
Fixes: c737b7c4510026 ("netfilter: bridge: add helpers for fetching physin/outdev")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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NFT_JUMP/GOTO erronously sets length to sizeof(void *).
We then allocate insufficient memory when such element is added to a vmap.
Suggested-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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ALU64_DIV instruction should be dividing 64-bit by 64-bit,
whereas do_div() does 64-bit by 32-bit divide.
x64 and arm64 JITs correctly implement 64 by 64 unsigned divide.
llvm BPF backend emits code assuming that ALU64_DIV does 64 by 64.
Fixes: 89aa075832b0 ("net: sock: allow eBPF programs to be attached to sockets")
Reported-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently when interface type is MAC to Phy, netif_carrier_(on/off)
is called which is not needed as Phy lib already updates the carrier
status to net stack. This is needed only for other interface types
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Here the "other side" refers to the guest or host.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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With my job change kernel work will be "own time"; I'm keeping lguest
and modules (and the virtio standards work), but virtio kernel has to
go.
This makes it clear that Michael is in charge. He's good, but having
me watch over his shoulder won't help.
Good luck Michael!
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph RBD fix from Sage Weil.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: end I/O the entire obj_request on error
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When we end I/O struct request with error, we need to pass
obj_request->length as @nr_bytes so that the entire obj_request worth
of bytes is completed. Otherwise block layer ends up confused and we
trip on
rbd_assert(more ^ (which == img_request->obj_request_count));
in rbd_img_obj_callback() due to more being true no matter what. We
already do it in most cases but we are missing some, in particular
those where we don't even get a chance to submit any obj_requests, due
to an early -ENOMEM for example.
A number of obj_request->xferred assignments seem to be redundant but
I haven't touched any of obj_request->xferred stuff to keep this small
and isolated.
Cc: Alex Elder <elder@linaro.org>
Cc: stable@vger.kernel.org # 3.10+
Reported-by: Shawn Edwards <lesser.evil@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"A few more btrfs fixes.
These range from corners Filipe found in the new free space cache
writeback to a grab bag of fixes from the list"
* 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: btrfs_release_extent_buffer_page didn't free pages of dummy extent
Btrfs: fill ->last_trans for delayed inode in btrfs_fill_inode.
btrfs: unlock i_mutex after attempting to delete subvolume during send
btrfs: check io_ctl_prepare_pages return in __btrfs_write_out_cache
btrfs: fix race on ENOMEM in alloc_extent_buffer
btrfs: handle ENOMEM in btrfs_alloc_tree_block
Btrfs: fix find_free_dev_extent() malfunction in case device tree has hole
Btrfs: don't check for delalloc_bytes in cache_save_setup
Btrfs: fix deadlock when starting writeback of bg caches
Btrfs: fix race between start dirty bg cache writeout and bg deletion
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btrfs_release_extent_buffer_page() can't handle dummy extent that
allocated by btrfs_clone_extent_buffer() properly. That is because
reference count of pages that allocated by btrfs_clone_extent_buffer()
was 2, 1 by alloc_page(), and another by attach_extent_buffer_page().
Running following command repeatly can check this memory leak problem
btrfs inspect-internal inode-resolve 256 /mnt/btrfs
Signed-off-by: Chien-Kuan Yeh <ckya@synology.com>
Signed-off-by: Forrest Liu <forrestl@synology.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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We need to fill inode when we found a node for it in delayed_nodes_tree.
But we did not fill the ->last_trans currently, it will cause the test
of xfstest/generic/311 fail. Scenario of the 311 is shown as below:
Problem:
(1). test_fd = open(fname, O_RDWR|O_DIRECT)
(2). pwrite(test_fd, buf, 4096, 0)
(3). close(test_fd)
(4). drop_all_caches() <-------- "echo 3 > /proc/sys/vm/drop_caches"
(5). test_fd = open(fname, O_RDWR|O_DIRECT)
(6). fsync(test_fd);
<-------- we did not get the correct log entry for the file
Reason:
When we re-open this file in (5), we would find a node
in delayed_nodes_tree and fill the inode we are lookup with the
information. But the ->last_trans is not filled, then the fsync()
will check the ->last_trans and found it's 0 then say this inode
is already in our tree which is commited, not recording the extents
for it.
Fix:
This patch fill the ->last_trans properly and set the
runtime_flags if needed in this situation. Then we can get the
log entries we expected after (6) and generic/311 passed.
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaoxie@huawei.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Whenever the check for a send in progress introduced in commit
521e0546c970 (btrfs: protect snapshots from deleting during send) is
hit, we return without unlocking inode->i_mutex. This is easy to see
with lockdep enabled:
[ +0.000059] ================================================
[ +0.000028] [ BUG: lock held when returning to user space! ]
[ +0.000029] 4.0.0-rc5-00096-g3c435c1 #93 Not tainted
[ +0.000026] ------------------------------------------------
[ +0.000029] btrfs/211 is leaving the kernel with locks still held!
[ +0.000029] 1 lock held by btrfs/211:
[ +0.000023] #0: (&type->i_mutex_dir_key){+.+.+.}, at: [<ffffffff8135b8df>] btrfs_ioctl_snap_destroy+0x2df/0x7a0
Make sure we unlock it in the error path.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Chris Mason <clm@fb.com>
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If io_ctl_prepare_pages fails, the pages in io_ctl.pages are not valid.
When we try to access them later, things will blow up in various ways.
Also fix the comment about the return value, which is an errno on error,
not -1, and update the cases where it was not.
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Consider the following interleaving of overlapping calls to
alloc_extent_buffer:
Call 1:
- Successfully allocates a few pages with find_or_create_page
- find_or_create_page fails, goto free_eb
- Unlocks the allocated pages
Call 2:
- Calls find_or_create_page and gets a page in call 1's extent_buffer
- Finds that the page is already associated with an extent_buffer
- Grabs a reference to the half-written extent_buffer and calls
mark_extent_buffer_accessed on it
mark_extent_buffer_accessed will then try to call mark_page_accessed on
a null page and panic.
The fix is to decrement the reference count on the half-written
extent_buffer before unlocking the pages so call 2 won't use it. We
should also set exists = NULL in the case that we don't use exists to
avoid accidentally returning a freed extent_buffer in an error case.
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
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This is one of the first places to give out when memory is tight. Handle
it properly rather than with a BUG_ON.
Also fix the comment about the return value, which is an ERR_PTR, not
NULL, on error.
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
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If device tree has hole, find_free_dev_extent() cannot find available
address properly.
The problem can be reproduce by following script.
mntpath=/btrfs
loopdev=/dev/loop0
filepath=/home/forrest/image
umount $mntpath
losetup -d $loopdev
truncate --size 100g $filepath
losetup $loopdev $filepath
mkfs.btrfs -f $loopdev
mount $loopdev $mntpath
# make device tree with one big hole
for i in `seq 1 1 100`; do
fallocate -l 1g $mntpath/$i
done
sync
for i in `seq 1 1 95`; do
rm $mntpath/$i
done
sync
# wait cleaner thread remove unused block group
sleep 300
fallocate -l 1g $mntpath/aaa
# failed to allocate new chunk
fallocate -l 1g $mntpath/bbb
Above script will make device tree with one big hole, and can only allocate
just one chunk in a transaction, so failed to allocate new chunk for $mntpath/bbb
item 8 key (1 DEV_EXTENT 2185232384) itemoff 15859 itemsize 48
dev extent chunk_tree 3
chunk objectid 256 chunk offset 106292051968 length 1073741824
item 9 key (1 DEV_EXTENT 104190705664) itemoff 15811 itemsize 48
dev extent chunk_tree 3
chunk objectid 256 chunk offset 103108575232 length 1073741824
Signed-off-by: Forrest Liu <forrestl@synology.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Now that we're doing free space cache writeback outside the critical
section in the commit, there is a bigger window for delalloc_bytes to
be added after a cache has been written. find_free_extent may do this
without putting the block group back into the dirty list, and also
without a transaction running.
Checking for delalloc_bytes in cache_save_setup means we might leave the
cache marked as written without invalidating it. Consistency checks
during mount will toss the cache, but it's better to get rid of the
check in cache_save_setup and let it get invalidated by the checks
already done during cache write out.
Signed-off-by: Chris Mason <clm@fb.com>
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While starting the writes of the dirty block group caches, if we don't
find a block group item in the extent tree we were leaving without
releasing our path, running delayed references and then looping again to
process any new dirty block groups. However this second iteration of the
loop could cause a deadlock because it tries to lock some other extent
tree node/leaf which another task already locked and it's blocked because
it's waiting for a lock on some node/leaf that is in our path that was not
released before.
We could also deadlock when running the delayed references - as we could
end up trying to lock the same nodes/leafs that we have in our local path
(with a different lock type).
Got into such case when running xfstests:
[20892.242791] ------------[ cut here ]------------
[20892.243776] WARNING: CPU: 0 PID: 13299 at fs/btrfs/super.c:260 __btrfs_abort_transaction+0x52/0x114 [btrfs]()
[20892.245874] BTRFS: Transaction aborted (error -2)
(...)
[20892.269378] Call Trace:
[20892.269915] [<ffffffff8142fa46>] dump_stack+0x4f/0x7b
[20892.271097] [<ffffffff8108b6a2>] ? console_unlock+0x361/0x3ad
[20892.272173] [<ffffffff81045ea5>] warn_slowpath_common+0xa1/0xbb
[20892.273386] [<ffffffffa0509a6d>] ? __btrfs_abort_transaction+0x52/0x114 [btrfs]
[20892.274857] [<ffffffff81045f05>] warn_slowpath_fmt+0x46/0x48
[20892.275851] [<ffffffffa0509a6d>] __btrfs_abort_transaction+0x52/0x114 [btrfs]
[20892.277341] [<ffffffffa0515e10>] write_one_cache_group+0x68/0xaf [btrfs]
[20892.278628] [<ffffffffa052088a>] btrfs_start_dirty_block_groups+0x18d/0x29b [btrfs]
[20892.280191] [<ffffffffa052f077>] btrfs_commit_transaction+0x130/0x9c9 [btrfs]
(...)
[20892.291316] ---[ end trace 597f77e664245373 ]---
[20892.293955] BTRFS: error (device sdg) in write_one_cache_group:3184: errno=-2 No such entry
[20892.297390] BTRFS info (device sdg): forced readonly
[20892.298222] ------------[ cut here ]------------
[20892.299190] WARNING: CPU: 0 PID: 13299 at fs/btrfs/ctree.c:2683 btrfs_search_slot+0x7e/0x7d2 [btrfs]()
(...)
[20892.326253] Call Trace:
[20892.326904] [<ffffffff8142fa46>] dump_stack+0x4f/0x7b
[20892.329503] [<ffffffff8108b6a2>] ? console_unlock+0x361/0x3ad
[20892.330815] [<ffffffff81045ea5>] warn_slowpath_common+0xa1/0xbb
[20892.332556] [<ffffffffa0510b73>] ? btrfs_search_slot+0x7e/0x7d2 [btrfs]
[20892.333955] [<ffffffff81045f62>] warn_slowpath_null+0x1a/0x1c
[20892.335562] [<ffffffffa0510b73>] btrfs_search_slot+0x7e/0x7d2 [btrfs]
[20892.336849] [<ffffffff8107b024>] ? arch_local_irq_save+0x9/0xc
[20892.338222] [<ffffffffa051ad52>] ? cache_save_setup+0x43/0x2a5 [btrfs]
[20892.339823] [<ffffffffa051ad66>] ? cache_save_setup+0x57/0x2a5 [btrfs]
[20892.341275] [<ffffffff814351a4>] ? _raw_spin_unlock+0x32/0x46
[20892.342810] [<ffffffffa0515de7>] write_one_cache_group+0x3f/0xaf [btrfs]
[20892.344184] [<ffffffffa052088a>] btrfs_start_dirty_block_groups+0x18d/0x29b [btrfs]
[20892.347162] [<ffffffffa052f077>] btrfs_commit_transaction+0x130/0x9c9 [btrfs]
(...)
[20892.361015] ---[ end trace 597f77e664245374 ]---
[21120.688097] INFO: task kworker/u8:17:29854 blocked for more than 120 seconds.
[21120.689881] Tainted: G W 4.0.0-rc5-btrfs-next-9+ #2
[21120.691384] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
(...)
[21120.703696] Call Trace:
[21120.704310] [<ffffffff8143107e>] schedule+0x74/0x83
[21120.705490] [<ffffffffa055f025>] btrfs_tree_lock+0xd7/0x236 [btrfs]
[21120.706757] [<ffffffff81075cd6>] ? signal_pending_state+0x31/0x31
[21120.708156] [<ffffffffa054ac1e>] lock_extent_buffer_for_io+0x3e/0x194 [btrfs]
[21120.709892] [<ffffffffa054bb86>] ? btree_write_cache_pages+0x273/0x385 [btrfs]
[21120.711605] [<ffffffffa054bc42>] btree_write_cache_pages+0x32f/0x385 [btrfs]
[21120.723440] [<ffffffffa0527552>] btree_writepages+0x23/0x5c [btrfs]
[21120.724943] [<ffffffff8110c4c8>] do_writepages+0x23/0x2c
[21120.726008] [<ffffffff81176dde>] __writeback_single_inode+0x73/0x2fa
[21120.727230] [<ffffffff8117714a>] ? writeback_sb_inodes+0xe5/0x38b
[21120.728526] [<ffffffff811771fb>] ? writeback_sb_inodes+0x196/0x38b
[21120.729701] [<ffffffff8117726a>] writeback_sb_inodes+0x205/0x38b
(...)
[21120.747853] INFO: task btrfs:13282 blocked for more than 120 seconds.
[21120.749459] Tainted: G W 4.0.0-rc5-btrfs-next-9+ #2
[21120.751137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
(...)
[21120.768457] Call Trace:
[21120.769039] [<ffffffff8143107e>] schedule+0x74/0x83
[21120.770107] [<ffffffffa052f25c>] btrfs_commit_transaction+0x315/0x9c9 [btrfs]
[21120.771558] [<ffffffff81075cd6>] ? signal_pending_state+0x31/0x31
[21120.773659] [<ffffffffa056fd8c>] prepare_to_relocate+0xcb/0xd2 [btrfs]
[21120.776257] [<ffffffffa05741da>] relocate_block_group+0x44/0x4a9 [btrfs]
[21120.777755] [<ffffffffa05747a0>] ? btrfs_relocate_block_group+0x161/0x288 [btrfs]
[21120.779459] [<ffffffffa05747a8>] btrfs_relocate_block_group+0x169/0x288 [btrfs]
[21120.781153] [<ffffffffa0550403>] btrfs_relocate_chunk.isra.29+0x3e/0xa7 [btrfs]
[21120.783918] [<ffffffffa05518fd>] btrfs_balance+0xaa4/0xc52 [btrfs]
[21120.785436] [<ffffffff8114306e>] ? cpu_cache_get.isra.39+0xe/0x1f
[21120.786434] [<ffffffffa0559252>] btrfs_ioctl_balance+0x23f/0x2b0 [btrfs]
(...)
[21120.889251] INFO: task fsstress:13288 blocked for more than 120 seconds.
[21120.890526] Tainted: G W 4.0.0-rc5-btrfs-next-9+ #2
[21120.891773] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
(...)
[21120.899960] Call Trace:
[21120.900743] [<ffffffff8143107e>] schedule+0x74/0x83
[21120.903004] [<ffffffffa055f025>] btrfs_tree_lock+0xd7/0x236 [btrfs]
[21120.904383] [<ffffffff81075cd6>] ? signal_pending_state+0x31/0x31
[21120.905608] [<ffffffffa051125b>] btrfs_search_slot+0x766/0x7d2 [btrfs]
[21120.906812] [<ffffffff8114290e>] ? virt_to_head_page+0x9/0x2c
[21120.907874] [<ffffffff81144b7f>] ? cache_alloc_debugcheck_after.isra.42+0x16c/0x1cb
[21120.909551] [<ffffffffa05124e0>] btrfs_insert_empty_items+0x5d/0xa8 [btrfs]
[21120.910914] [<ffffffffa0512585>] btrfs_insert_item+0x5a/0xa5 [btrfs]
[21120.912181] [<ffffffffa0520271>] ? btrfs_create_pending_block_groups+0x96/0x130 [btrfs]
[21120.913784] [<ffffffffa052028a>] btrfs_create_pending_block_groups+0xaf/0x130 [btrfs]
[21120.915374] [<ffffffffa052ffc2>] __btrfs_end_transaction+0x84/0x366 [btrfs]
[21120.916735] [<ffffffffa05302b4>] btrfs_end_transaction+0x10/0x12 [btrfs]
[21120.917996] [<ffffffffa051ab26>] btrfs_check_data_free_space+0x11f/0x27c [btrfs]
[21120.919478] [<ffffffffa051ba25>] btrfs_delalloc_reserve_space+0x1e/0x51 [btrfs]
[21120.921226] [<ffffffffa05382f2>] btrfs_truncate_page+0x85/0x2c4 [btrfs]
[21120.923121] [<ffffffffa0538572>] btrfs_cont_expand+0x41/0x3ef [btrfs]
[21120.924449] [<ffffffffa0541091>] ? btrfs_file_write_iter+0x19a/0x431 [btrfs]
[21120.926602] [<ffffffff8107b024>] ? arch_local_irq_save+0x9/0xc
[21120.927769] [<ffffffffa0541091>] ? btrfs_file_write_iter+0x19a/0x431 [btrfs]
[21120.929324] [<ffffffffa05410a0>] ? btrfs_file_write_iter+0x1a9/0x431 [btrfs]
[21120.930723] [<ffffffffa05410d9>] btrfs_file_write_iter+0x1e2/0x431 [btrfs]
[21120.931897] [<ffffffff81067d85>] ? get_parent_ip+0xe/0x3e
[21120.934446] [<ffffffff811534c3>] new_sync_write+0x7c/0xa0
[21120.935528] [<ffffffff81153b58>] vfs_write+0xb2/0x117
(...)
Fixes: 1bbc621ef284 ("Btrfs: allow block group cache writeout
outside critical section in commit")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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While running xfstests I ran into the following:
[20892.242791] ------------[ cut here ]------------
[20892.243776] WARNING: CPU: 0 PID: 13299 at fs/btrfs/super.c:260 __btrfs_abort_transaction+0x52/0x114 [btrfs]()
[20892.245874] BTRFS: Transaction aborted (error -2)
[20892.247329] Modules linked in: btrfs dm_snapshot dm_bufio dm_flakey dm_mod crc32c_generic xor raid6_pq nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc loop fuse$
[20892.258488] CPU: 0 PID: 13299 Comm: fsstress Tainted: G W 4.0.0-rc5-btrfs-next-9+ #2
[20892.262011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
[20892.264738] 0000000000000009 ffff880427f8bc18 ffffffff8142fa46 ffffffff8108b6a2
[20892.266244] ffff880427f8bc68 ffff880427f8bc58 ffffffff81045ea5 ffff880427f8bc48
[20892.267761] ffffffffa0509a6d 00000000fffffffe ffff8803545d6f40 ffffffffa05a15a0
[20892.269378] Call Trace:
[20892.269915] [<ffffffff8142fa46>] dump_stack+0x4f/0x7b
[20892.271097] [<ffffffff8108b6a2>] ? console_unlock+0x361/0x3ad
[20892.272173] [<ffffffff81045ea5>] warn_slowpath_common+0xa1/0xbb
[20892.273386] [<ffffffffa0509a6d>] ? __btrfs_abort_transaction+0x52/0x114 [btrfs]
[20892.274857] [<ffffffff81045f05>] warn_slowpath_fmt+0x46/0x48
[20892.275851] [<ffffffffa0509a6d>] __btrfs_abort_transaction+0x52/0x114 [btrfs]
[20892.277341] [<ffffffffa0515e10>] write_one_cache_group+0x68/0xaf [btrfs]
[20892.278628] [<ffffffffa052088a>] btrfs_start_dirty_block_groups+0x18d/0x29b [btrfs]
[20892.280191] [<ffffffffa052f077>] btrfs_commit_transaction+0x130/0x9c9 [btrfs]
[20892.281781] [<ffffffff8107d33d>] ? trace_hardirqs_on+0xd/0xf
[20892.282873] [<ffffffffa054163b>] btrfs_sync_file+0x313/0x387 [btrfs]
[20892.284111] [<ffffffff8117acad>] vfs_fsync_range+0x95/0xa4
[20892.285203] [<ffffffff810e603f>] ? time_hardirqs_on+0x15/0x28
[20892.286290] [<ffffffff8123960b>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[20892.287469] [<ffffffff8117acd8>] vfs_fsync+0x1c/0x1e
[20892.288412] [<ffffffff8117ae54>] do_fsync+0x34/0x4e
[20892.289348] [<ffffffff8117b07c>] SyS_fsync+0x10/0x14
[20892.290255] [<ffffffff81435b32>] system_call_fastpath+0x12/0x17
[20892.291316] ---[ end trace 597f77e664245373 ]---
[20892.293955] BTRFS: error (device sdg) in write_one_cache_group:3184: errno=-2 No such entry
[20892.297390] BTRFS info (device sdg): forced readonly
This happens because in btrfs_start_dirty_block_groups() we splice the
transaction's list of dirty block groups into a local list and then we
keep extracting the first element of the list without holding the
cache_write_mutex mutex. This means that before we acquire that mutex
the first block group on the list might be removed by a conurrent task
running btrfs_remove_block_group(). So make sure we extract the first
element (and test the list emptyness) while holding that mutex.
Fixes: 1bbc621ef284 ("Btrfs: allow block group cache writeout
outside critical section in commit")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"Not too much here, but we've addressed a couple of nasty issues in the
dma-mapping code as well as adding the halfword and byte variants of
load_acquire/store_release following on from the CSD locking bug that
you fixed in the core.
- fix perf devicetree warnings at probe time
- fix memory leak in __dma_free()
- ensure DMA buffers are always zeroed
- show IRQ trigger in /proc/interrupts (for parity with ARM)
- implement byte and halfword access for smp_{load_acquire,store_release}"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: perf: Fix the pmu node name in warning message
arm64: perf: don't warn about missing interrupt-affinity property for PPIs
arm64: add missing PAGE_ALIGN() to __dma_free()
arm64: dma-mapping: always clear allocated buffers
ARM64: Enable CONFIG_GENERIC_IRQ_SHOW_LEVEL
arm64: add missing data types in smp_load_acquire/smp_store_release
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With commit d5efd9cc9cf2 ("arm64: pmu: add support for interrupt-affinity
property"), we print a warning when we find a PMU SPI with a missing
missing interrupt-affinity property in a pmu node. Unfortunately, we
pass the wrong (NULL) device node to of_node_full_name, resulting in
unhelpful messages such as:
hw perfevents: Failed to parse <no-node>/interrupt-affinity[0]
This patch fixes the name to that of the pmu node.
Fixes: d5efd9cc9cf2 (arm64: pmu: add support for interrupt-affinity property)
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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