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Currently, the i40e_vsi_setup_queue_map is basing the count of queues in
TCs on a VSI's alloc_queue_pairs member which is not changed throughout
any user's action (for example via ethtool's set_channels callback).
This implies that vsi->tc_config.tc_info[n].qcount value that is given
to the kernel via netdev_set_tc_queue() that notifies about the count of
queues per particular traffic class is constant even if user has changed
the total count of queues.
This in turn caused the kernel warning after setting the queue count to
the lower value than the initial one:
$ ethtool -l ens801f0
Channel parameters for ens801f0:
Pre-set maximums:
RX: 0
TX: 0
Other: 1
Combined: 64
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 64
$ ethtool -L ens801f0 combined 40
[dmesg]
Number of in use tx queues changed invalidating tc mappings. Priority
traffic classification disabled!
Reason was that vsi->alloc_queue_pairs stayed at 64 value which was used
to set the qcount on TC0 (by default only TC0 exists so all of the
existing queues are assigned to TC0). we update the offset/qcount via
netdev_set_tc_queue() back to the old value but then the
netif_set_real_num_tx_queues() is using the vsi->num_queue_pairs as a
value which got set to 40.
Fix it by using vsi->req_queue_pairs as a queue count that will be
distributed across TCs. Do it only for non-zero values, which implies
that user actually requested the new count of queues.
For VSIs other than main, stay with the vsi->alloc_queue_pairs as we
only allow manipulating the queue count on main VSI.
Fixes: bc6d33c8d93f ("i40e: Fix the number of queues available to be mapped for use")
Co-developed-by: Maciej Fijalkowski <[email protected]>
Signed-off-by: Maciej Fijalkowski <[email protected]>
Co-developed-by: Przemyslaw Patynowski <[email protected]>
Signed-off-by: Przemyslaw Patynowski <[email protected]>
Signed-off-by: Eryk Rybak <[email protected]>
Tested-by: Tony Brelinski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>
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Remove the reason of null pointer dereference in sync VSI filters.
Added new I40E_VSI_RELEASING flag to signalize deleting and releasing
of VSI resources to sync this thread with sync filters subtask.
Without this patch it is possible to start update the VSI filter list
after VSI is removed, that's causing a kernel oops.
Fixes: 41c445ff0f48 ("i40e: main driver core")
Signed-off-by: Grzegorz Szczurek <[email protected]>
Signed-off-by: Michal Maloszewski <[email protected]>
Reviewed-by: Przemyslaw Patynowski <[email protected]>
Reviewed-by: Witold Fijalkowski <[email protected]>
Reviewed-by: Jaroslaw Gawin <[email protected]>
Reviewed-by: Aleksandr Loktionov <[email protected]>
Tested-by: Tony Brelinski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>
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Setting VLAN port increasing RX queue max_pkt_size
by 4 bytes to take VLAN tag into account.
Trigger the VF reset when setting port VLAN for
VF to renegotiate its capabilities and reinitialize.
Fixes: ba4e003d29c1 ("i40e: don't hold spinlock while resetting VF")
Signed-off-by: Sylwester Dziedziuch <[email protected]>
Signed-off-by: Aleksandr Loktionov <[email protected]>
Signed-off-by: Eryk Rybak <[email protected]>
Tested-by: Konrad Jankowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>
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Change the values of EVENT_* constants from bit masks to bit numbers as
accepted by {clear,set,test}_bit() functions.
Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Łukasz Stelmach <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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virtio_net_hdr_to_skb does not set the skb's gso_size and gso_type
correctly for UFO packets received via virtio-net that are a little over
the GSO size. This can lead to problems elsewhere in the networking
stack, e.g. ovs_vport_send dropping over-sized packets if gso_size is
not set.
This is due to the comparison
if (skb->len - p_off > gso_size)
not properly accounting for the transport layer header.
p_off includes the size of the transport layer header (thlen), so
skb->len - p_off is the size of the TCP/UDP payload.
gso_size is read from the virtio-net header. For UFO, fragmentation
happens at the IP level so does not need to include the UDP header.
Hence the calculation could be comparing a TCP/UDP payload length with
an IP payload length, causing legitimate virtio-net packets to have
lack gso_type/gso_size information.
Example: a UDP packet with payload size 1473 has IP payload size 1481.
If the guest used UFO, it is not fragmented and the virtio-net header's
flags indicate that it is a GSO frame (VIRTIO_NET_HDR_GSO_UDP), with
gso_size = 1480 for an MTU of 1500. skb->len will be 1515 and p_off
will be 42, so skb->len - p_off = 1473. Hence the comparison fails, and
shinfo->gso_size and gso_type are not set as they should be.
Instead, add the UDP header length before comparing to gso_size when
using UFO. In this way, it is the size of the IP payload that is
compared to gso_size.
Fixes: 6dd912f82680 ("net: check untrusted gso_size at kernel entry")
Signed-off-by: Jonathan Davies <[email protected]>
Reviewed-by: Willem de Bruijn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Access to netdev after free_netdev() will cause use-after-free bug.
Move debug log before free_netdev() call to avoid it.
Fixes: 7472dd9f6499 ("staging: fsl-dpaa2/eth: Move print message")
Signed-off-by: Pavel Skripkin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Like ThinkaPad Thunderbolt 4 Dock, more Lenovo docks start to use the original
Realtek USB ethernet chip ID 0bda:8153.
Lenovo Docks always use their own IDs for usb hub, even for older Docks.
If parent hub is from Lenovo, then r8152 should try MAC passthrough.
Verified on Lenovo TBT3 dock too.
Signed-off-by: Aaron Ma <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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The cross-reference for the handbooks section works. However, it is
meant to describe the path inside the Kernel's doc where the section
is, but there's an space instead of a dash, plus it lacks the .rst at
the end, which makes:
./scripts/documentation-file-ref-check
to complain.
Fixes: 604370e106cc ("Documentation/process: Add maintainer handbooks section")
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
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Changeset 2f5947dfcaec ("Documentation: move Documentation/virtual to Documentation/virt")
renamed: Documentation/virtual/kvm/vcpu-requests.rst
to: Documentation/virt/kvm/vcpu-requests.rst.
Update its cross-reference accordingly.
Fixes: 2f5947dfcaec ("Documentation: move Documentation/virtual to Documentation/virt")
Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
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The file name: accounting/delay-accounting.rst
should be, instead: Documentation/accounting/delay-accounting.rst.
Also, there's no need to use doc:`foo`, as automarkup.py will
automatically handle plain text mentions to Documentation/
files.
So, update its cross-reference accordingly.
Fixes: fcb501704554 ("delayacct: Document task_delayacct sysctl")
Fixes: c3123552aad3 ("docs: accounting: convert to ReST")
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
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Changeset d20b41115ad5 ("libbpf: Rename libbpf documentation index file")
renamed: Documentation/bpf/libbpf/libbpf.rst
to: Documentation/bpf/libbpf/index.rst.
Update its cross-reference accordingly.
Fixes: d20b41115ad5 ("libbpf: Rename libbpf documentation index file")
Acked-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-fixes-2021-11-16
Please pull this mlx5 fixes series, or let me know in case of any problem.
====================
Signed-off-by: David S. Miller <[email protected]>
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sticon_build_attr() checked the reverse argument and flipped
background and foreground color, but returned the non-reverse
value afterwards. Fix this and also add two local variables
for foreground and background color to make the code easier
to read.
Signed-off-by: Sven Schnelle <[email protected]>
Cc: <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
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When calling setattr_prepare() to determine the validity of the attributes the
ia_{g,u}id fields contain the value that will be written to inode->i_{g,u}id.
When the {g,u}id attribute of the file isn't altered and the caller's fs{g,u}id
matches the current {g,u}id attribute the attribute change is allowed.
The value in ia_{g,u}id does already account for idmapped mounts and will have
taken the relevant idmapping into account. So in order to verify that the
{g,u}id attribute isn't changed we simple need to compare the ia_{g,u}id value
against the inode's i_{g,u}id value.
This only has any meaning for idmapped mounts as idmapping helpers are
idempotent without them. And for idmapped mounts this really only has a meaning
when circular idmappings are used, i.e. mappings where e.g. id 1000 is mapped
to id 1001 and id 1001 is mapped to id 1000. Such ciruclar mappings can e.g. be
useful when sharing the same home directory between multiple users at the same
time.
As an example consider a directory with two files: /source/file1 owned by
{g,u}id 1000 and /source/file2 owned by {g,u}id 1001. Assume we create an
idmapped mount at /target with an idmapping that maps files owned by {g,u}id
1000 to being owned by {g,u}id 1001 and files owned by {g,u}id 1001 to being
owned by {g,u}id 1000. In effect, the idmapped mount at /target switches the
ownership of /source/file1 and source/file2, i.e. /target/file1 will be owned
by {g,u}id 1001 and /target/file2 will be owned by {g,u}id 1000.
This means that a user with fs{g,u}id 1000 must be allowed to setattr
/target/file2 from {g,u}id 1000 to {g,u}id 1000. Similar, a user with fs{g,u}id
1001 must be allowed to setattr /target/file1 from {g,u}id 1001 to {g,u}id
1001. Conversely, a user with fs{g,u}id 1000 must fail to setattr /target/file1
from {g,u}id 1001 to {g,u}id 1000. And a user with fs{g,u}id 1001 must fail to
setattr /target/file2 from {g,u}id 1000 to {g,u}id 1000. Both cases must fail
with EPERM for non-capable callers.
Before this patch we could end up denying legitimate attribute changes and
allowing invalid attribute changes when circular mappings are used. To even get
into this situation the caller must've been privileged both to create that
mapping and to create that idmapped mount.
This hasn't been seen in the wild anywhere but came up when expanding the
testsuite during work on a series of hardening patches. All idmapped fstests
pass without any regressions and we add new tests to verify the behavior of
circular mappings.
Link: https://lore.kernel.org/r/[email protected]
Fixes: 2f221d6f7b88 ("attr: handle idmapped mounts")
Cc: Seth Forshee <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Al Viro <[email protected]>
Cc: [email protected]
CC: [email protected]
Reviewed-by: Christoph Hellwig <[email protected]>
Acked-by: Seth Forshee <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>
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The recent addition of timestamp correction to compensate the CDC error
introduced a subtle signed/unsigned bug in stmmac_get_tx_hwtstamp() while
it managed for some obscure reason to avoid that in stmmac_get_rx_hwtstamp().
The issue is:
s64 adjust = 0;
u64 ns;
adjust += -(2 * (NSEC_PER_SEC / priv->plat->clk_ptp_rate));
ns += adjust;
works by chance on 64bit, but falls apart on 32bit because the compiler
knows that adjust fits into 32bit and then treats the addition as a u64 +
u32 resulting in an off by ~2 seconds failure.
The RX variant uses an u64 for adjust and does the adjustment via
ns -= adjust;
because consistency is obviously overrated.
Get rid of the pointless zero initialized adjust variable and do:
ns -= (2 * NSEC_PER_SEC) / priv->plat->clk_ptp_rate;
which is obviously correct and spares the adjust obfuscation. Aside of that
it yields a more accurate result because the multiplication takes place
before the integer divide truncation and not afterwards.
Stick the calculation into an inline so it can't be accidentally
disimproved. Return an u32 from that inline as the result is guaranteed
to fit which lets the compiler optimize the substraction.
Cc: [email protected]
Fixes: 3600be5f58c1 ("net: stmmac: add timestamp correction to rid CDC sync error")
Reported-by: Benedikt Spranger <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Benedikt Spranger <[email protected]>
Tested-by: Kurt Kanzenbach <[email protected]> # Intel EHL
Link: https://lore.kernel.org/r/87mtm578cs.ffs@tglx
Signed-off-by: Jakub Kicinski <[email protected]>
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Xin Long says:
====================
net: fix the mirred packet drop due to the incorrect dst
This issue was found when using OVS HWOL on OVN-k8s. These packets
dropped on rx path were seen with output dst, which should've been
dropped from the skbs when redirecting them.
The 1st patch is to the fix and the 2nd is a selftest to reproduce
and verify it.
====================
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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add a selftest that verifies the correct behavior of TC act_mirred egress
to ingress: in particular, it checks if the dst_entry is removed from skb
before redirect egress -> ingress. The correct behavior is: an ICMP 'echo
request' generated by ping will be received and generate a reply the same
way as the one generated by mausezahn.
Suggested-by: Jamal Hadi Salim <[email protected]>
Signed-off-by: Davide Caratti <[email protected]>
Acked-by: Cong Wang <[email protected]>
Reviewed-by: Marcelo Ricardo Leitner <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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Without dropping dst, the packets sent from local mirred/redirected
to ingress will may still use the old dst. ip_rcv() will drop it as
the old dst is for output and its .input is dst_discard.
This patch is to fix by also dropping dst for those packets that are
mirred or redirected from egress to ingress in act_mirred.
Note that we don't drop it for the direction change from ingress to
egress, as on which there might be a user case attaching a metadata
dst by act_tunnel_key that would be used later.
Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
Signed-off-by: Xin Long <[email protected]>
Acked-by: Cong Wang <[email protected]>
Reviewed-by: Marcelo Ricardo Leitner <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
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When the amt module is being removed, it calls cancel_delayed_work()
to cancel pending delayed_work. But this function doesn't wait for
canceling delayed_work.
So, workers can be still doing after module delete.
In order to avoid this, cancel_delayed_work_sync() should be used instead.
Suggested-by: Jakub Kicinski <[email protected]>
Fixes: bc54e49c140b ("amt: add multicast(IGMP) report message handler")
Signed-off-by: Taehee Yoo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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I've sent a patch to [email protected] few days ago and
got a reply from [email protected]:
Delivery has failed to these recipients or groups:
[email protected]<mailto:[email protected]>
The email address you entered couldn't be found. Please check the
recipient's email address and try to resend the message. If the problem
continues, please contact your helpdesk.
As requested by Alok Prasad, replacing [email protected]
with Manish Chopra's email address. [0]
Link: https://lore.kernel.org/all/[email protected]/ [0]
Signed-off-by: Pavel Skripkin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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bp->sriov_cfg is not defined when CONFIG_BNXT_SRIOV is not set. Fix
it by adding a helper function bnxt_sriov_cfg() to handle the logic
with or without the config option.
Fixes: 46d08f55d24e ("bnxt_en: extend RTNL to VF check in devlink driver_reinit")
Reported-by: kernel test robot <[email protected]>
Reviewed-by: Edwin Peer <[email protected]>
Reviewed-by: Andy Gospodarek <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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The kernel test robot reported a following issue:
>> drivers/net/ethernet/marvell/mvmdio.c:426:36: warning:
unused variable 'orion_mdio_acpi_match' [-Wunused-const-variable]
static const struct acpi_device_id orion_mdio_acpi_match[] = {
^
1 warning generated.
Fix that by surrounding the variable by appropriate ifdef.
Fixes: c54da4c1acb1 ("net: mvmdio: add ACPI support")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Marcin Wojtas <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Couple of fixes:
* bad dont-reorder check
* throughput LED trigger for various new(ish) paths
* radiotap header generation
* locking assertions in mac80211 with monitor mode
* radio statistics
* don't try to access IV when not present
* call stop_ap for P2P_GO as well as we should
* tag 'mac80211-for-net-2021-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211:
mac80211: fix throughput LED trigger
mac80211: fix monitor_sdata RCU/locking assertions
mac80211: drop check for DONT_REORDER in __ieee80211_select_queue
mac80211: fix radiotap header generation
mac80211: do not access the IV when it was stripped
nl80211: fix radio statistics in survey dump
cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
====================
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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Daniel Borkmann says:
====================
pull-request: bpf 2021-11-16
We've added 12 non-merge commits during the last 5 day(s) which contain
a total of 23 files changed, 573 insertions(+), 73 deletions(-).
The main changes are:
1) Fix pruning regression where verifier went overly conservative rejecting
previsouly accepted programs, from Alexei Starovoitov and Lorenz Bauer.
2) Fix verifier TOCTOU bug when using read-only map's values as constant
scalars during verification, from Daniel Borkmann.
3) Fix a crash due to a double free in XSK's buffer pool, from Magnus Karlsson.
4) Fix libbpf regression when cross-building runqslower, from Jean-Philippe Brucker.
5) Forbid use of bpf_ktime_get_coarse_ns() and bpf_timer_*() helpers in tracing
programs due to deadlock possibilities, from Dmitrii Banshchikov.
6) Fix checksum validation in sockmap's udp_read_sock() callback, from Cong Wang.
7) Various BPF sample fixes such as XDP stats in xdp_sample_user, from Alexander Lobakin.
8) Fix libbpf gen_loader error handling wrt fd cleanup, from Kumar Kartikeya Dwivedi.
* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
udp: Validate checksum in udp_read_sock()
bpf: Fix toctou on read-only map's constant scalar tracking
samples/bpf: Fix build error due to -isystem removal
selftests/bpf: Add tests for restricted helpers
bpf: Forbid bpf_ktime_get_coarse_ns and bpf_timer_* in tracing progs
libbpf: Perform map fd cleanup for gen_loader in case of error
samples/bpf: Fix incorrect use of strlen in xdp_redirect_cpu
tools/runqslower: Fix cross-build
samples/bpf: Fix summary per-sec stats in xdp_sample_user
selftests/bpf: Check map in map pruning
bpf: Fix inner map state pruning regression.
xsk: Fix crash on double free in buffer pool
====================
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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On regular ConnectX HCAs getting encap mode isn't supported when the
E-Switch is in NONE mode. Current code would return no error code when
trying to get encap mode in such case which is wrong.
Fix by returning error value to indicate failure to caller in such case.
Fixes: 8e0aa4bc959c ("net/mlx5: E-switch, Protect eswitch mode changes")
Signed-off-by: Raed Salem <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
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Currently, In NETDEV_CHANGELOWERSTATE/NETDEV_CHANGEUPPERSTATE events
handling, tracking is not fully completed if the LAG device is not ready
at the time the events occur. But, we must keep track of the upper and
lower states after receiving the events because RoCE needs this info in
mlx5_lag_get_roce_netdev() - in order to return the corresponding port
that its running on. Returning the wrong (not most recent) port will lead
to gids table being incorrect.
For example: If during the attachment of a slave to the bond, the other
non-attached port performs pci_reload, then the LAG device is not ready,
but that should not result in dismissing attached slave tracker update
automatically (which is performed in mlx5_handle_changelowerstate()), Since
these events might not come later, which can lead to both bond ports
having tx_enabled=0 - which is not a valid state of LAG bond.
Fixes: 9b412cc35f00 ("net/mlx5e: Add LAG warning if bond slave is not lag master")
Signed-off-by: Maher Sanalla <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Reviewed-by: Jianbo Liu <[email protected]>
Reviewed-by: Roi Dayan <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
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CT clear action offload adds additional mod hdr actions to the
flow's original mod actions in order to clear the registers which
hold ct_state.
When such flow also includes encap action, a neigh update event
can cause the driver to unoffload the flow and then reoffload it.
Each time this happens, the ct clear handling adds that same set
of mod hdr actions to reset ct_state until the max of mod hdr
actions is reached.
Also the driver never releases the allocated mod hdr actions and
causing a memleak.
Fix above two issues by moving CT clear mod acts allocation
into the parsing actions phase and only use it when offloading the rule.
The release of mod acts will be done in the normal flow_put().
backtrace:
[<000000007316e2f3>] krealloc+0x83/0xd0
[<00000000ef157de1>] mlx5e_mod_hdr_alloc+0x147/0x300 [mlx5_core]
[<00000000970ce4ae>] mlx5e_tc_match_to_reg_set_and_get_id+0xd7/0x240 [mlx5_core]
[<0000000067c5fa17>] mlx5e_tc_match_to_reg_set+0xa/0x20 [mlx5_core]
[<00000000d032eb98>] mlx5_tc_ct_entry_set_registers.isra.0+0x36/0xc0 [mlx5_core]
[<00000000fd23b869>] mlx5_tc_ct_flow_offload+0x272/0x1f10 [mlx5_core]
[<000000004fc24acc>] mlx5e_tc_offload_fdb_rules.part.0+0x150/0x620 [mlx5_core]
[<00000000dc741c17>] mlx5e_tc_encap_flows_add+0x489/0x690 [mlx5_core]
[<00000000e92e49d7>] mlx5e_rep_update_flows+0x6e4/0x9b0 [mlx5_core]
[<00000000f60f5602>] mlx5e_rep_neigh_update+0x39a/0x5d0 [mlx5_core]
Fixes: 1ef3018f5af3 ("net/mlx5e: CT: Support clear action")
Signed-off-by: Roi Dayan <[email protected]>
Reviewed-by: Paul Blakey <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
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When doing a flow counters bulk query, the number of counters to query
must be aligned to 4. Current SF bulk query len is not aligned to 4,
which leads to an error when trying to query more than 4 counters.
Fix it by aligning SF bulk query len to 4.
Fixes: 2fdeb4f4c2ae ("net/mlx5: Reduce flow counters bulk query buffer size for SFs")
Signed-off-by: Avihai Horon <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
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A user can enable VFs without changing E-Switch mode, this can happen
when a user moves straight to switchdev mode and only once in switchdev
VFs are enabled via the sysfs interface.
The cited commit assumed this isn't possible and exposed a single
API function where the E-switch calls into the lag code, breaks the lag
and prevents any other lag operations to take place until the
E-switch update has ended.
Breaking the hardware lag when it isn't needed can make it such that
hardware lag can't be enabled again.
In the sysfs call path check if the current E-Switch mode is NONE,
in the context of the function it can only mean the E-Switch is moving
out of NONE mode and the hardware lag should be disabled and enabled
once the mode change has ended. If the mode isn't NONE it means
VFs are about to be enabled and such operation doesn't require
toggling the hardware lag.
Fixes: cac1eb2cf2e3 ("net/mlx5: Lag, properly lock eswitch if needed")
Signed-off-by: Mark Bloch <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
In the fast unload flow, the device state is set to internal error,
which indicates that the driver started the destroy process.
In this case, when a destroy command is being executed, it should return
MLX5_CMD_STAT_OK.
Fix MLX5_CMD_OP_DESTROY_UCTX and MLX5_CMD_OP_DESTROY_UMEM to return OK
instead of EIO.
This fixes a call trace in the umem release process -
[ 2633.536695] Call Trace:
[ 2633.537518] ib_uverbs_remove_one+0xc3/0x140 [ib_uverbs]
[ 2633.538596] remove_client_context+0x8b/0xd0 [ib_core]
[ 2633.539641] disable_device+0x8c/0x130 [ib_core]
[ 2633.540615] __ib_unregister_device+0x35/0xa0 [ib_core]
[ 2633.541640] ib_unregister_device+0x21/0x30 [ib_core]
[ 2633.542663] __mlx5_ib_remove+0x38/0x90 [mlx5_ib]
[ 2633.543640] auxiliary_bus_remove+0x1e/0x30 [auxiliary]
[ 2633.544661] device_release_driver_internal+0x103/0x1f0
[ 2633.545679] bus_remove_device+0xf7/0x170
[ 2633.546640] device_del+0x181/0x410
[ 2633.547606] mlx5_rescan_drivers_locked.part.10+0x63/0x160 [mlx5_core]
[ 2633.548777] mlx5_unregister_device+0x27/0x40 [mlx5_core]
[ 2633.549841] mlx5_uninit_one+0x21/0xc0 [mlx5_core]
[ 2633.550864] remove_one+0x69/0xe0 [mlx5_core]
[ 2633.551819] pci_device_remove+0x3b/0xc0
[ 2633.552731] device_release_driver_internal+0x103/0x1f0
[ 2633.553746] unbind_store+0xf6/0x130
[ 2633.554657] kernfs_fop_write+0x116/0x190
[ 2633.555567] vfs_write+0xa5/0x1a0
[ 2633.556407] ksys_write+0x4f/0xb0
[ 2633.557233] do_syscall_64+0x5b/0x1a0
[ 2633.558071] entry_SYSCALL_64_after_hwframe+0x65/0xca
[ 2633.559018] RIP: 0033:0x7f9977132648
[ 2633.559821] Code: 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 8d 05 55 6f 2d 00 8b 00 85 c0 75 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 41 54 49 89 d4 55
[ 2633.562332] RSP: 002b:00007fffb1a83888 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 2633.563472] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007f9977132648
[ 2633.564541] RDX: 000000000000000c RSI: 000055b90546e230 RDI: 0000000000000001
[ 2633.565596] RBP: 000055b90546e230 R08: 00007f9977406860 R09: 00007f9977a54740
[ 2633.566653] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f99774056e0
[ 2633.567692] R13: 000000000000000c R14: 00007f9977400880 R15: 000000000000000c
[ 2633.568725] ---[ end trace 10b4fe52945e544d ]---
Fixes: 6a6fabbfa3e8 ("net/mlx5: Update pci error handler entries and command translation")
Signed-off-by: Neta Ostrovsky <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
The existing loop doesn't cast the buffer while scanning it, which
results in out-of-bounds read and failure to create the matcher.
Fixes: 941f19798a11 ("net/mlx5: DR, Add check for unsupported fields in match param")
Signed-off-by: Yevgeny Kliteynik <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
When querying eswitch manager vport capabilities as "other = 1",
we encounter a FW compatibility issue with older FW versions.
To maintain backward compatibility, eswitch manager vport should
be queried as "other = 0" vport both for ECPF and non-ECPF cases.
This patch fixes these queries and improves the code readability
by handling eswitch manager and uplink vports separately, avoiding
the excessive 'if' conditions. Also, uplink caps are stored similar
to esw manager and not as part of xarray.
Fixes: dd4acb2a0954 ("net/mlx5: DR, Add missing query for vport 0")
Signed-off-by: Yevgeny Kliteynik <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
Prior to this patch in case mlx5_core_destroy_cq() failed it proceeds
to rest of destroy operations. mlx5_core_destroy_cq() could be called again
by user and cause additional call of mlx5_debug_cq_remove().
cq->dbg was not nullify in previous call and cause the crash.
Fix it by nullify cq->dbg pointer after removal.
Also proceed to destroy operations only if FW return 0
for MLX5_CMD_OP_DESTROY_CQ command.
general protection fault, probably for non-canonical address 0x2000300004058: 0000 [#1] SMP PTI
CPU: 5 PID: 1228 Comm: python Not tainted 5.15.0-rc5_for_upstream_min_debug_2021_10_14_11_06 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
RIP: 0010:lockref_get+0x1/0x60
Code: 5d e9 53 ff ff ff 48 8d 7f 70 e8 0a 2e 48 00 c7 85 d0 00 00 00 02
00 00 00 c6 45 70 00 fb 5d c3 c3 cc cc cc cc cc cc cc cc 53 <48> 8b 17
48 89 fb 85 d2 75 3d 48 89 d0 bf 64 00 00 00 48 89 c1 48
RSP: 0018:ffff888137dd7a38 EFLAGS: 00010206
RAX: 0000000000000000 RBX: ffff888107d5f458 RCX: 00000000fffffffe
RDX: 000000000002c2b0 RSI: ffffffff8155e2e0 RDI: 0002000300004058
RBP: ffff888137dd7a88 R08: 0002000300004058 R09: ffff8881144a9f88
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881141d4000
R13: ffff888137dd7c68 R14: ffff888137dd7d58 R15: ffff888137dd7cc0
FS: 00007f4644f2a4c0(0000) GS:ffff8887a2d40000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b4500f4380 CR3: 0000000114f7a003 CR4: 0000000000170ea0
Call Trace:
simple_recursive_removal+0x33/0x2e0
? debugfs_remove+0x60/0x60
debugfs_remove+0x40/0x60
mlx5_debug_cq_remove+0x32/0x70 [mlx5_core]
mlx5_core_destroy_cq+0x41/0x1d0 [mlx5_core]
devx_obj_cleanup+0x151/0x330 [mlx5_ib]
? __pollwait+0xd0/0xd0
? xas_load+0x5/0x70
? xa_load+0x62/0xa0
destroy_hw_idr_uobject+0x20/0x80 [ib_uverbs]
uverbs_destroy_uobject+0x3b/0x360 [ib_uverbs]
uobj_destroy+0x54/0xa0 [ib_uverbs]
ib_uverbs_cmd_verbs+0xaf2/0x1160 [ib_uverbs]
? uverbs_finalize_object+0xd0/0xd0 [ib_uverbs]
ib_uverbs_ioctl+0xc4/0x1b0 [ib_uverbs]
__x64_sys_ioctl+0x3e4/0x8e0
Fixes: 94b960b9deff ("net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path")
Signed-off-by: Valentine Fatiev <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
E-Switch encap mode is relevant only when in switchdev mode.
The RDMA driver can query the encap configuration via
mlx5_eswitch_get_encap_mode(). Make sure it returns the currently
used mode and not the set one.
This reverts the cited commit which reset the encap mode
on entering switchdev and fixes the original issue properly.
Fixes: 9a64144d683a ("net/mlx5: E-Switch, Fix default encap mode")
Signed-off-by: Paul Blakey <[email protected]>
Reviewed-by: Mark Bloch <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
Function mlx5e_take_tmp_flow() skips flows with zero reference count. This
can cause syndrome 0x179e84 when the called from neigh or route update code
and the skipped flow is not removed from the hardware by the time
underlying encap/decap resource is deleted. Add new completion
'del_hw_done' that is completed when flow is unoffloaded. This is safe to
do because flow with reference count zero needs to be detached from
encap/decap entry before its memory is deallocated, which requires taking
the encap_tbl_lock mutex that is held by the event handlers code.
Fixes: 8914add2c9e5 ("net/mlx5e: Handle FIB events to update tunnel endpoint device")
Signed-off-by: Vlad Buslov <[email protected]>
Reviewed-by: Roi Dayan <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
For the TLS RX resync flow, we maintain a list of TLS contexts
that require some attention, to communicate their resync information
to the HW.
Here we fix list corruptions, by protecting the entries against
movements coming from resync_handle_seq_match(), until their resync
handling in napi is fully completed.
Fixes: e9ce991bce5b ("net/mlx5e: kTLS, Add resiliency to RX resync failures")
Signed-off-by: Tariq Toukan <[email protected]>
Reviewed-by: Maxim Mikityanskiy <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
|
|
- Cleanups for the perf test infrastructure and mapping hugepages
- Avoid contention on mmap_sem when the guests start to run
- Add event channel upcall support to xen_shinfo_test
|
|
This patch fixes an issue that an u32 netlink value is handled as a
signed enum value which doesn't fit into the range of u32 netlink type.
If it's handled as -1 value some BIT() evaluation ends in a
shift-out-of-bounds issue. To solve the issue we set the to u32 max which
is s32 "-1" value to keep backwards compatibility and let the followed enum
values start counting at 0. This brings the compiler to never handle the
enum as signed and a check if the value is above NL802154_IFTYPE_MAX should
filter -1 out.
Fixes: f3ea5e44231a ("ieee802154: add new interface command")
Signed-off-by: Alexander Aring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stefan Schmidt <[email protected]>
|
|
The v2 balance ioctl has been introduced more than 9 years ago. Users of
the old v1 ioctl should have long been migrated to it. It's time we
deprecate it and eventually remove it.
The only known user is in btrfs-progs that tries v1 as a fallback in
case v2 is not supported. This is not necessary anymore.
Reviewed-by: Josef Bacik <[email protected]>
Reviewed-by: Anand Jain <[email protected]>
Signed-off-by: Nikolay Borisov <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
|
|
The bitfields have_csum and io_error are currently signed which is not
recommended as the representation is an implementation defined
behaviour. Fix this by making the bit-fields unsigned ints.
Fixes: 2c36395430b0 ("btrfs: scrub: remove the anonymous structure from scrub_page")
Reviewed-by: Josef Bacik <[email protected]>
Reviewed-by: Qu Wenruo <[email protected]>
Signed-off-by: Colin Ian King <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
|
|
When a disk has write caching disabled, we skip submission of a bio with
flush and sync requests before writing the superblock, since it's not
needed. However when the integrity checker is enabled, this results in
reports that there are metadata blocks referred by a superblock that
were not properly flushed. So don't skip the bio submission only when
the integrity checker is enabled for the sake of simplicity, since this
is a debug tool and not meant for use in non-debug builds.
fstests/btrfs/220 trigger a check-integrity warning like the following
when CONFIG_BTRFS_FS_CHECK_INTEGRITY=y and the disk with WCE=0.
btrfs: attempt to write superblock which references block M @5242880 (sdb2/5242880/0) which is not flushed out of disk's write cache (block flush_gen=1, dev->flush_gen=0)!
------------[ cut here ]------------
WARNING: CPU: 28 PID: 843680 at fs/btrfs/check-integrity.c:2196 btrfsic_process_written_superblock+0x22a/0x2a0 [btrfs]
CPU: 28 PID: 843680 Comm: umount Not tainted 5.15.0-0.rc5.39.el8.x86_64 #1
Hardware name: Dell Inc. Precision T7610/0NK70N, BIOS A18 09/11/2019
RIP: 0010:btrfsic_process_written_superblock+0x22a/0x2a0 [btrfs]
RSP: 0018:ffffb642afb47940 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: ffff8b722fc97d00 RDI: ffff8b722fc97d00
RBP: ffff8b5601c00000 R08: 0000000000000000 R09: c0000000ffff7fff
R10: 0000000000000001 R11: ffffb642afb476f8 R12: ffffffffffffffff
R13: ffffb642afb47974 R14: ffff8b5499254c00 R15: 0000000000000003
FS: 00007f00a06d4080(0000) GS:ffff8b722fc80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff5cff5ff0 CR3: 00000001c0c2a006 CR4: 00000000001706e0
Call Trace:
btrfsic_process_written_block+0x2f7/0x850 [btrfs]
__btrfsic_submit_bio.part.19+0x310/0x330 [btrfs]
? bio_associate_blkg_from_css+0xa4/0x2c0
btrfsic_submit_bio+0x18/0x30 [btrfs]
write_dev_supers+0x81/0x2a0 [btrfs]
? find_get_pages_range_tag+0x219/0x280
? pagevec_lookup_range_tag+0x24/0x30
? __filemap_fdatawait_range+0x6d/0xf0
? __raw_callee_save___native_queued_spin_unlock+0x11/0x1e
? find_first_extent_bit+0x9b/0x160 [btrfs]
? __raw_callee_save___native_queued_spin_unlock+0x11/0x1e
write_all_supers+0x1b3/0xa70 [btrfs]
? __raw_callee_save___native_queued_spin_unlock+0x11/0x1e
btrfs_commit_transaction+0x59d/0xac0 [btrfs]
close_ctree+0x11d/0x339 [btrfs]
generic_shutdown_super+0x71/0x110
kill_anon_super+0x14/0x30
btrfs_kill_super+0x12/0x20 [btrfs]
deactivate_locked_super+0x31/0x70
cleanup_mnt+0xb8/0x140
task_work_run+0x6d/0xb0
exit_to_user_mode_prepare+0x1f0/0x200
syscall_exit_to_user_mode+0x12/0x30
do_syscall_64+0x46/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f009f711dfb
RSP: 002b:00007fff5cff7928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 000055b68c6c9970 RCX: 00007f009f711dfb
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000055b68c6c9b50
RBP: 0000000000000000 R08: 000055b68c6ca900 R09: 00007f009f795580
R10: 0000000000000000 R11: 0000000000000246 R12: 000055b68c6c9b50
R13: 00007f00a04bf184 R14: 0000000000000000 R15: 00000000ffffffff
---[ end trace 2c4b82abcef9eec4 ]---
S-65536(sdb2/65536/1)
-->
M-1064960(sdb2/1064960/1)
Reviewed-by: Filipe Manana <[email protected]>
Signed-off-by: Wang Yugui <[email protected]>
Signed-off-by: David Sterba <[email protected]>
|
|
Often some test cases like btrfs/161 trigger lockdep splats that complain
about possible unsafe lock scenario due to the fact that during mount,
when reading the chunk tree we end up calling blkdev_get_by_path() while
holding a read lock on a leaf of the chunk tree. That produces a lockdep
splat like the following:
[ 3653.683975] ======================================================
[ 3653.685148] WARNING: possible circular locking dependency detected
[ 3653.686301] 5.15.0-rc7-btrfs-next-103 #1 Not tainted
[ 3653.687239] ------------------------------------------------------
[ 3653.688400] mount/447465 is trying to acquire lock:
[ 3653.689320] ffff8c6b0c76e528 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.691054]
but task is already holding lock:
[ 3653.692155] ffff8c6b0a9f39e0 (btrfs-chunk-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x24/0x110 [btrfs]
[ 3653.693978]
which lock already depends on the new lock.
[ 3653.695510]
the existing dependency chain (in reverse order) is:
[ 3653.696915]
-> #3 (btrfs-chunk-00){++++}-{3:3}:
[ 3653.698053] down_read_nested+0x4b/0x140
[ 3653.698893] __btrfs_tree_read_lock+0x24/0x110 [btrfs]
[ 3653.699988] btrfs_read_lock_root_node+0x31/0x40 [btrfs]
[ 3653.701205] btrfs_search_slot+0x537/0xc00 [btrfs]
[ 3653.702234] btrfs_insert_empty_items+0x32/0x70 [btrfs]
[ 3653.703332] btrfs_init_new_device+0x563/0x15b0 [btrfs]
[ 3653.704439] btrfs_ioctl+0x2110/0x3530 [btrfs]
[ 3653.705405] __x64_sys_ioctl+0x83/0xb0
[ 3653.706215] do_syscall_64+0x3b/0xc0
[ 3653.706990] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3653.708040]
-> #2 (sb_internal#2){.+.+}-{0:0}:
[ 3653.708994] lock_release+0x13d/0x4a0
[ 3653.709533] up_write+0x18/0x160
[ 3653.710017] btrfs_sync_file+0x3f3/0x5b0 [btrfs]
[ 3653.710699] __loop_update_dio+0xbd/0x170 [loop]
[ 3653.711360] lo_ioctl+0x3b1/0x8a0 [loop]
[ 3653.711929] block_ioctl+0x48/0x50
[ 3653.712442] __x64_sys_ioctl+0x83/0xb0
[ 3653.712991] do_syscall_64+0x3b/0xc0
[ 3653.713519] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3653.714233]
-> #1 (&lo->lo_mutex){+.+.}-{3:3}:
[ 3653.715026] __mutex_lock+0x92/0x900
[ 3653.715648] lo_open+0x28/0x60 [loop]
[ 3653.716275] blkdev_get_whole+0x28/0x90
[ 3653.716867] blkdev_get_by_dev.part.0+0x142/0x320
[ 3653.717537] blkdev_open+0x5e/0xa0
[ 3653.718043] do_dentry_open+0x163/0x390
[ 3653.718604] path_openat+0x3f0/0xa80
[ 3653.719128] do_filp_open+0xa9/0x150
[ 3653.719652] do_sys_openat2+0x97/0x160
[ 3653.720197] __x64_sys_openat+0x54/0x90
[ 3653.720766] do_syscall_64+0x3b/0xc0
[ 3653.721285] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3653.721986]
-> #0 (&disk->open_mutex){+.+.}-{3:3}:
[ 3653.722775] __lock_acquire+0x130e/0x2210
[ 3653.723348] lock_acquire+0xd7/0x310
[ 3653.723867] __mutex_lock+0x92/0x900
[ 3653.724394] blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.725041] blkdev_get_by_path+0xb8/0xd0
[ 3653.725614] btrfs_get_bdev_and_sb+0x1b/0xb0 [btrfs]
[ 3653.726332] open_fs_devices+0xd7/0x2c0 [btrfs]
[ 3653.726999] btrfs_read_chunk_tree+0x3ad/0x870 [btrfs]
[ 3653.727739] open_ctree+0xb8e/0x17bf [btrfs]
[ 3653.728384] btrfs_mount_root.cold+0x12/0xde [btrfs]
[ 3653.729130] legacy_get_tree+0x30/0x50
[ 3653.729676] vfs_get_tree+0x28/0xc0
[ 3653.730192] vfs_kern_mount.part.0+0x71/0xb0
[ 3653.730800] btrfs_mount+0x11d/0x3a0 [btrfs]
[ 3653.731427] legacy_get_tree+0x30/0x50
[ 3653.731970] vfs_get_tree+0x28/0xc0
[ 3653.732486] path_mount+0x2d4/0xbe0
[ 3653.732997] __x64_sys_mount+0x103/0x140
[ 3653.733560] do_syscall_64+0x3b/0xc0
[ 3653.734080] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3653.734782]
other info that might help us debug this:
[ 3653.735784] Chain exists of:
&disk->open_mutex --> sb_internal#2 --> btrfs-chunk-00
[ 3653.737123] Possible unsafe locking scenario:
[ 3653.737865] CPU0 CPU1
[ 3653.738435] ---- ----
[ 3653.739007] lock(btrfs-chunk-00);
[ 3653.739449] lock(sb_internal#2);
[ 3653.740193] lock(btrfs-chunk-00);
[ 3653.740955] lock(&disk->open_mutex);
[ 3653.741431]
*** DEADLOCK ***
[ 3653.742176] 3 locks held by mount/447465:
[ 3653.742739] #0: ffff8c6acf85c0e8 (&type->s_umount_key#44/1){+.+.}-{3:3}, at: alloc_super+0xd5/0x3b0
[ 3653.744114] #1: ffffffffc0b28f70 (uuid_mutex){+.+.}-{3:3}, at: btrfs_read_chunk_tree+0x59/0x870 [btrfs]
[ 3653.745563] #2: ffff8c6b0a9f39e0 (btrfs-chunk-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x24/0x110 [btrfs]
[ 3653.747066]
stack backtrace:
[ 3653.747723] CPU: 4 PID: 447465 Comm: mount Not tainted 5.15.0-rc7-btrfs-next-103 #1
[ 3653.748873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[ 3653.750592] Call Trace:
[ 3653.750967] dump_stack_lvl+0x57/0x72
[ 3653.751526] check_noncircular+0xf3/0x110
[ 3653.752136] ? stack_trace_save+0x4b/0x70
[ 3653.752748] __lock_acquire+0x130e/0x2210
[ 3653.753356] lock_acquire+0xd7/0x310
[ 3653.753898] ? blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.754596] ? lock_is_held_type+0xe8/0x140
[ 3653.755125] ? blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.755729] ? blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.756338] __mutex_lock+0x92/0x900
[ 3653.756794] ? blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.757400] ? do_raw_spin_unlock+0x4b/0xa0
[ 3653.757930] ? _raw_spin_unlock+0x29/0x40
[ 3653.758437] ? bd_prepare_to_claim+0x129/0x150
[ 3653.758999] ? trace_module_get+0x2b/0xd0
[ 3653.759508] ? try_module_get.part.0+0x50/0x80
[ 3653.760072] blkdev_get_by_dev.part.0+0xe7/0x320
[ 3653.760661] ? devcgroup_check_permission+0xc1/0x1f0
[ 3653.761288] blkdev_get_by_path+0xb8/0xd0
[ 3653.761797] btrfs_get_bdev_and_sb+0x1b/0xb0 [btrfs]
[ 3653.762454] open_fs_devices+0xd7/0x2c0 [btrfs]
[ 3653.763055] ? clone_fs_devices+0x8f/0x170 [btrfs]
[ 3653.763689] btrfs_read_chunk_tree+0x3ad/0x870 [btrfs]
[ 3653.764370] ? kvm_sched_clock_read+0x14/0x40
[ 3653.764922] open_ctree+0xb8e/0x17bf [btrfs]
[ 3653.765493] ? super_setup_bdi_name+0x79/0xd0
[ 3653.766043] btrfs_mount_root.cold+0x12/0xde [btrfs]
[ 3653.766780] ? rcu_read_lock_sched_held+0x3f/0x80
[ 3653.767488] ? kfree+0x1f2/0x3c0
[ 3653.767979] legacy_get_tree+0x30/0x50
[ 3653.768548] vfs_get_tree+0x28/0xc0
[ 3653.769076] vfs_kern_mount.part.0+0x71/0xb0
[ 3653.769718] btrfs_mount+0x11d/0x3a0 [btrfs]
[ 3653.770381] ? rcu_read_lock_sched_held+0x3f/0x80
[ 3653.771086] ? kfree+0x1f2/0x3c0
[ 3653.771574] legacy_get_tree+0x30/0x50
[ 3653.772136] vfs_get_tree+0x28/0xc0
[ 3653.772673] path_mount+0x2d4/0xbe0
[ 3653.773201] __x64_sys_mount+0x103/0x140
[ 3653.773793] do_syscall_64+0x3b/0xc0
[ 3653.774333] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3653.775094] RIP: 0033:0x7f648bc45aaa
This happens because through btrfs_read_chunk_tree(), which is called only
during mount, ends up acquiring the mutex open_mutex of a block device
while holding a read lock on a leaf of the chunk tree while other paths
need to acquire other locks before locking extent buffers of the chunk
tree.
Since at mount time when we call btrfs_read_chunk_tree() we know that
we don't have other tasks running in parallel and modifying the chunk
tree, we can simply skip locking of chunk tree extent buffers. So do
that and move the assertion that checks the fs is not yet mounted to the
top block of btrfs_read_chunk_tree(), with a comment before doing it.
Signed-off-by: Filipe Manana <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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Ordered work functions aren't guaranteed to be handled by the same thread
which executed the normal work functions. The only way execution between
normal/ordered functions is synchronized is via the WORK_DONE_BIT,
unfortunately the used bitops don't guarantee any ordering whatsoever.
This manifested as seemingly inexplicable crashes on ARM64, where
async_chunk::inode is seen as non-null in async_cow_submit which causes
submit_compressed_extents to be called and crash occurs because
async_chunk::inode suddenly became NULL. The call trace was similar to:
pc : submit_compressed_extents+0x38/0x3d0
lr : async_cow_submit+0x50/0xd0
sp : ffff800015d4bc20
<registers omitted for brevity>
Call trace:
submit_compressed_extents+0x38/0x3d0
async_cow_submit+0x50/0xd0
run_ordered_work+0xc8/0x280
btrfs_work_helper+0x98/0x250
process_one_work+0x1f0/0x4ac
worker_thread+0x188/0x504
kthread+0x110/0x114
ret_from_fork+0x10/0x18
Fix this by adding respective barrier calls which ensure that all
accesses preceding setting of WORK_DONE_BIT are strictly ordered before
setting the flag. At the same time add a read barrier after reading of
WORK_DONE_BIT in run_ordered_work which ensures all subsequent loads
would be strictly ordered after reading the bit. This in turn ensures
are all accesses before WORK_DONE_BIT are going to be strictly ordered
before any access that can occur in ordered_func.
Reported-by: Chris Murphy <[email protected]>
Fixes: 08a9ff326418 ("btrfs: Added btrfs_workqueue_struct implemented ordered execution based on kernel workqueue")
CC: [email protected] # 4.4+
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2011928
Reviewed-by: Josef Bacik <[email protected]>
Tested-by: Chris Murphy <[email protected]>
Signed-off-by: Nikolay Borisov <[email protected]>
Signed-off-by: David Sterba <[email protected]>
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[BUG]
The following script can cause btrfs to crash:
$ mount -o compress-force=lzo $DEV /mnt
$ dd if=/dev/urandom of=/mnt/foo bs=4k count=1
$ sync
The call trace looks like this:
general protection fault, probably for non-canonical address 0xe04b37fccce3b000: 0000 [#1] PREEMPT SMP NOPTI
CPU: 5 PID: 164 Comm: kworker/u20:3 Not tainted 5.15.0-rc7-custom+ #4
Workqueue: btrfs-delalloc btrfs_work_helper [btrfs]
RIP: 0010:__memcpy+0x12/0x20
Call Trace:
lzo_compress_pages+0x236/0x540 [btrfs]
btrfs_compress_pages+0xaa/0xf0 [btrfs]
compress_file_range+0x431/0x8e0 [btrfs]
async_cow_start+0x12/0x30 [btrfs]
btrfs_work_helper+0xf6/0x3e0 [btrfs]
process_one_work+0x294/0x5d0
worker_thread+0x55/0x3c0
kthread+0x140/0x170
ret_from_fork+0x22/0x30
---[ end trace 63c3c0f131e61982 ]---
[CAUSE]
In lzo_compress_pages(), parameter @out_pages is not only an output
parameter (for the number of compressed pages), but also an input
parameter, as the upper limit of compressed pages we can utilize.
In commit d4088803f511 ("btrfs: subpage: make lzo_compress_pages()
compatible"), the refactoring doesn't take @out_pages as an input, thus
completely ignoring the limit.
And for compress-force case, we could hit incompressible data that
compressed size would go beyond the page limit, and cause the above
crash.
[FIX]
Save @out_pages as @max_nr_page, and pass it to lzo_compress_pages(),
and check if we're beyond the limit before accessing the pages.
Note: this also fixes crash on 32bit architectures that was suspected to
be caused by merge of btrfs patches to 5.16-rc1. Reported in
https://lore.kernel.org/all/[email protected]/ .
Reported-by: Omar Sandoval <[email protected]>
Fixes: d4088803f511 ("btrfs: subpage: make lzo_compress_pages() compatible")
Reviewed-by: Omar Sandoval <[email protected]>
Reviewed-by: Josef Bacik <[email protected]>
Signed-off-by: Qu Wenruo <[email protected]>
Reviewed-by: David Sterba <[email protected]>
[ add note ]
Signed-off-by: David Sterba <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2021-11-15
This series contains updates to iavf driver only.
Mateusz adds a wait for reset completion when changing queue count which
could otherwise cause issues with VF reset.
Nick adds a null check for vf_res in iavf_fix_features(), corrects
ordering of function calls to resolve dependency issues, and prevents
possible freeing of a lock which isn't being held.
Piotr fixes logic that did not allow setting all multicast mode without
promiscuous mode.
Jake prevents possible accidental freeing of filter structure.
Mitch adds null checks for key and indir parameters in iavf_get_rxfh().
Surabhi adds an additional check that would, previously, cause the driver
to print a false error due to values obtained while the VF is in reset.
Grzegorz prevents a queue request of 0 which would cause queue count to
reset to default values.
Akeem restores VLAN filters when bringing the interface back up.
====================
Signed-off-by: David S. Miller <[email protected]>
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In vcpu_load_eoi_exitmap(), currently the eoi_exit_bitmap[4] array is
initialized only when Hyper-V context is available, in other path it is
just passed to kvm_x86_ops.load_eoi_exitmap() directly from on the stack,
which would cause unexpected interrupt delivery/handling issues, e.g. an
*old* linux kernel that relies on PIT to do clock calibration on KVM might
randomly fail to boot.
Fix it by passing ioapic_handled_vectors to load_eoi_exitmap() when Hyper-V
context is not available.
Fixes: f2bc14b69c38 ("KVM: x86: hyper-v: Prepare to meet unallocated Hyper-V context")
Cc: [email protected]
Reviewed-by: Vitaly Kuznetsov <[email protected]>
Signed-off-by: Huang Le <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Change memslot_modification_stress_test to use perf_test_destroy_vm
instead of manually calling ucall_uninit and kvm_vm_free.
No functional change intended.
Signed-off-by: David Matlack <[email protected]>
Reviewed-by: Ben Gardon <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Thread creation requires taking the mmap_sem in write mode, which causes
vCPU threads running in guest mode to block while they are populating
memory. Fix this by waiting for all vCPU threads to be created and start
running before entering guest mode on any one vCPU thread.
This substantially improves the "Populate memory time" when using 1GiB
pages since it allows all vCPUs to zero pages in parallel rather than
blocking because a writer is waiting (which is waiting for another vCPU
that is busy zeroing a 1GiB page).
Before:
$ ./dirty_log_perf_test -v256 -s anonymous_hugetlb_1gb
...
Populate memory time: 52.811184013s
After:
$ ./dirty_log_perf_test -v256 -s anonymous_hugetlb_1gb
...
Populate memory time: 10.204573342s
Signed-off-by: David Matlack <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Move vCPU thread creation and joining to common helper functions. This
is in preparation for the next commit which ensures that all vCPU
threads are fully created before entering guest mode on any one
vCPU.
No functional change intended.
Signed-off-by: David Matlack <[email protected]>
Reviewed-by: Ben Gardon <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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Start at iteration 0 instead of -1 to avoid having to initialize
vcpu_last_completed_iteration when setting up vCPU threads. This
simplifies the next commit where we move vCPU thread initialization
out to a common helper.
No functional change intended.
Signed-off-by: David Matlack <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
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