This is supposed to loop 1000 times and then give up. The problem is
it's a post-op and after the loop we test if "loop" is zero when really
it would be -1. Fix this by making it a pre-op.
Fixes: 1b7c55c453 ("liquidio: CN23XX queue manipulation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The "vf_vlan_info" struct ends with a 2 byte struct hole so we have to
memset it to ensure that no stack information is revealed to user space.
Fixes: 79aab093a0 ('net: Update API for VF vlan protocol 802.1ad support')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We should clear out the padding and unused struct members so that we
don't expose stack information to userspace.
Fixes: fdb3accc2c ('tipc: add the ability to get UDP options via netlink')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit e0d56fdd73 was a bit aggressive removing l3mdev calls in
the IPv4 stack. If the fib_lookup fails we do not want to drop to
make_route if the oif is an l3mdev device.
Also reverts 19664c6a00 ("net: l3mdev: Remove netif_index_is_l3_master")
which removed netif_index_is_l3_master.
Fixes: e0d56fdd73 ("net: l3mdev: remove redundant calls")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The phy_start() is used to indicate the PHY is now ready to do its
work. The state is changed, normally to PHY_UP which means that both
the MAC and the PHY are ready.
If the phy driver is using polling, when the next poll happens, the
state machine notices the PHY is now in PHY_UP, and kicks off
auto-negotiation, if needed.
If however, the PHY is using interrupts, there is no polling. The phy
is stuck in PHY_UP until the next interrupt comes along. And there is
no reason for the PHY to interrupt.
Have phy_start() schedule the state machine to run, which both speeds
up the polling use case, and makes the interrupt use case actually
work.
This problems exists whenever there is a state change which will not
cause an interrupt. Trigger the state machine in these cases,
e.g. phy_error().
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Cc: Kyle Roeschley <kyle.roeschley@ni.com>
Tested-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Wiht the latest rework of the xen-netback driver, we get a warning
on ARM about the types passed into min():
drivers/net/xen-netback/rx.c: In function 'xenvif_rx_next_chunk':
include/linux/kernel.h:739:16: error: comparison of distinct pointer types lacks a cast [-Werror]
The reason is that XEN_PAGE_SIZE is not size_t here. There
is no actual bug, and we can easily avoid the warning using the
min_t() macro instead of min().
Fixes: eb1723a29b ("xen-netback: refactor guest rx")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes a problem when propagated the
failure of ptp_clock_register to open function.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Cc: Rayagond Kokatanur <rayagond@vayavyalabs.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The gmac 4.x version has not extended descriptors
(that are available on 3.x instead of).
While initializing the PTP module, the advanced PTP was
enabled in case of extended descriptors. This cannot be
applied for 4.x version where only the hardware capability
register has to show if the feature is present.
Patch also adds some extra netdev_(debug/inof) to better
dump the configuration.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Cc: Rayagond Kokatanur <rayagond@vayavyalabs.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The definition of qed_get_rdma_ops() is not a prototype unless
we add 'void' here, as indicated by this W=1 warning:
drivers/net/ethernet/qlogic/qed/qed_roce.c: In function ‘qed_get_rdma_ops’:
drivers/net/ethernet/qlogic/qed/qed_roce.c:2950:28: error: old-style function definition [-Werror=old-style-definition]
Fixes: abd49676c7 ("qed: Add RoCE ll2 & GSI support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The software calculation of UDP checksum in Netvsc driver was
only handling IPv4 case. By using skb_checksum_help() instead
all protocols can be handled. Rearrange code to eliminate goto
and look like other drivers.
This is a temporary solution; recent versions of Window Server etc
do support UDP checksum offload, just need to do the appropriate negotiation
with host to validate before using. This will be done in later patch.
Please queue this for -stable as well.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Krister reported a kernel NULL pointer dereference after
tcf_action_init_1() invokes a_o->init(), it is a race condition
where one thread calling tcf_register_action() to initialize
the netns data after putting act ops in the global list and
the other thread searching the list and then calling
a_o->init(net, ...).
Fix this by moving the pernet ops registration before making
the action ops visible. This is fine because: a) we don't
rely on act_base in pernet ops->init(), b) in the worst case we
have a fully initialized netns but ops is still not ready so
new actions still can't be created.
Reported-by: Krister Johansen <kjlx@templeofstupid.com>
Tested-by: Krister Johansen <kjlx@templeofstupid.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a VIF has been ready for rx_stall_timeout (60s by default) and an
Rx ring is drained of all requests an Rx stall will be incorrectly
detected. When this occurs and the guest Rx queue is empty, the Rx
ring's event index will not be set and the frontend will not raise an
event when new requests are placed on the ring, permanently stalling
the VIF.
This is a regression introduced by eb1723a29b (xen-netback:
refactor guest rx).
Fix this by reinstating the setting of queue->last_rx_time when
placing a packet onto the guest Rx ring.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The reserved field precise_offset->rsv is not cleared before being
copied to user space, leaking kernel stack memory. Clear the struct
before it's copied.
Signed-off-by: Vlad Tsyrklevich <vlad@tsyrklevich.net>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I am hitting this in mlx5:
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c: In function
reclaim_pages_cmd.clone.0:
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:346: error: call
to __compiletime_assert_346 declared with attribute error:
BUILD_BUG_ON failed: __mlx5_bit_off(manage_pages_out, pas[i]) % 64
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c: In function give_pages:
drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:291: error: call
to __compiletime_assert_291 declared with attribute error:
BUILD_BUG_ON failed: __mlx5_bit_off(manage_pages_in, pas[i]) % 64
Problem is that this is doing a BUILD_BUG_ON on a non-constant
expression because of trying to take offset of pas[i] in the
structure.
Fix is to create MLX5_ARRAY_SET64 that takes an additional argument
that is the field index to separate between BUILD_BUG_ON on the array
constant field and the indexed field to assign the value to.
There are two callers of MLX5_SET64 that are trying to get a variable
offset, change those to call MLX5_ARRAY_SET64 passing 'pas' and 'i'
as the arguments to use in the offset check and the indexed value
assignment.
Fixes: a533ed5e17 ("net/mlx5: Pages management commands via mlx5 ifc")
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The Quectel EC21 and EC25 need the same "set DTR" request as devices
based on the MDM9230 chipset, but has no USB3 support. Our best guess
is that the "set DTR" functionality depends on chipset and/or
baseband firmware generation. But USB3 is still an optional feature.
Since we cannot enable this unconditionally for all older devices, and
there doesn't appear to be anything we can use in the USB descriptors
to identify these chips, we are forced to use a device specific quirk
flag.
Reported-and-tested-by: Sebastian Sjoholm <sebastian.sjoholm@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Benc says:
====================
openvswitch: vlan fixes
Fix three issues introduced by the 802.1AD patchset.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The internal device does support 802.1AD offloading since 018c1dda5f
("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink
attributes").
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the packet has its vlan tag in skb->vlan_tci, the length of the VLAN
header is not counted in skb->len. It doesn't make sense to subtract it.
Fixes: 018c1dda5f ("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink attributes")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
This code is called whenever flow key is being extracted from the packet.
The packet may be as likely vlan tagged as not.
Fixes: 018c1dda5f ("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink attributes")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since we will remove items off the list using list_del() we need
to use a safe version of the list_for_each_entry() macro aptly named
list_for_each_entry_safe().
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
While build testing with randconfig on x86, I ran into this warning
that appears to have been around forever
drivers/net/ethernet/ti/tlan.c: In function ‘tlan_probe1’:
drivers/net/ethernet/ti/tlan.c:614:1: error: label ‘err_out’ defined but not used [-Werror=unused-label]
This can be trivially avoided by just moving the label into the
existing #ifdef.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is useful to be able to see the hash configuration when running tests.
This patch adds a debugfs node for that purpose.
The original version of this patch (commit c0c64c1523) was reverted due
to build failures caused by a conflict with commit 0364a8824c
("xen-netback: switch to threaded irq for control ring"). This new version
of the patch is nearly identical to the original, the only difference
being that creation of the debugfs node is predicated on 'ctrl_irq' being
non-zero rather then the now non-existent 'ctrl_task'.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There are two ways to get tc filters from kernel to user space.
1) Full dump (tc_dump_tfilter())
2) RTM_GETTFILTER to get one precise filter, reducing overhead.
The second operation is unfortunately broadcasting its result,
polluting "tc monitor" users.
This patch makes sure only the requester gets the result, using
netlink_unicast() instead of rtnetlink_send()
Jamal cooked an iproute2 patch to implement "tc filter get" operation,
but other user space libraries already use RTM_GETTFILTER when a single
filter is queried, instead of dumping all filters.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit d352cf47d9 (cpufreq: conservative: Do not use transition
notifications) overlooked the case when the "frequency step" used
by the conservative governor is small relative to the distances
between the available frequencies and broke the algorithm by
using policy->cur instead of the previously requested frequency
when computing the next one.
As a result, the governor may not be able to go outside of a narrow
range between two consecutive available frequencies.
Fix the problem by making the governor save the previously requested
frequency and select the next one relative that value (unless it is
out of range, in which case policy->cur will be used instead).
Fixes: d352cf47d9 (cpufreq: conservative: Do not use transition notifications)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=177171
Reported-and-tested-by: Aleksey Rybalkin <aleksey@rybalkin.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
acpi_os_vprintf currently always uses a KERN_CONT prefix which may be
followed immediately by a proper KERN_<LEVEL>. Check if the buffer
already has a KERN_<LEVEL> at the start of the buffer and avoid the
unnecessary KERN_CONT.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
When running as Xen dom0 a special processor_aggregator driver is
needed. Don't register the standard driver in this case.
Without that check an error message:
"Error: Driver 'processor_aggregator' is already registered,
aborting..."
will be displayed.
Signed-off-by: Juergen Gross <jgross@suse.com>
[ rjw: Minor fixups ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Skip invalid entries when searching the frequency. This fixes cpufreq
at least on loongson2 MIPS board.
Fixes: da0c6dc00c (cpufreq: Handle sorted frequency tables more efficiently)
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.8+ <stable@vger.kernel.org> # 4.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It looks like the name of struct pstate_adjust_policy was updated
without updating its kerneldoc comment accordingly, so fix that
mistake.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The PID algorithm used by the intel_pstate driver tends to drive
performance to the minimum for workloads with utilization below the
setpoint, which is undesirable, so replace it with a modified
"proportional" algorithm on Atom.
The new algorithm will set the new P-state to be 1.25 times the
available maximum times the (frequency-invariant) utilization during
the previous sampling period except when the target P-state computed
this way is lower than the average P-state during the previous
sampling period. In the latter case, it will increase the target by
50% of the difference between it and the average P-state to prevent
performance from dropping down too fast in some cases.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
This set of changes contains support for PWM signal capture in the STi
driver as well as support for the PWM controller found on Meson SoCs.
There's also support added for the MediaTek MT2701 and SunXi H3 to the
existing drivers.
Other than that there's a fair set of miscellaneous cleanups and fixes
across the board.
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Merge tag 'pwm/for-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set of changes contains support for PWM signal capture in the STi
driver as well as support for the PWM controller found on Meson SoCs.
There's also support added for the MediaTek MT2701 and SunXi H3 to the
existing drivers.
Other than that there's a fair set of miscellaneous cleanups and fixes
across the board"
* tag 'pwm/for-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (24 commits)
pwm: meson: Handle unknown ID values
pwm: sti: Take the opportunity to conduct a little house keeping
pwm: sti: It's now valid for number of PWM channels to be zero
pwm: sti: Add PWM capture callback
pwm: sti: Add support for PWM capture interrupts
pwm: sti: Initialise PWM capture device data
pwm: sti: Supply PWM Capture clock handling
pwm: sti: Supply PWM capture register addresses and bit locations
pwm: sti: Only request clock rate when needed
pwm: sti: Reorganise register names in preparation for new functionality
pwm: sti: Rename channel => device
dt-bindings: pwm: sti: Update DT bindings for capture support
pwm: lpc-18xx: use pwm_set_chip_data
pwm: sunxi: Add H3 support
pwm: Add support for Meson PWM Controller
dt-bindings: pwm: Add bindings for Meson PWM Controller
pwm: samsung: Fix to use lowest div for large enough modulation bits
pwm: pwm-tipwmss: Remove all runtime PM gets/puts
pwm: cros-ec: Add __packed to prevent padding
pwm: Add MediaTek MT2701 display PWM driver support
...
The error checking here is messed up so we could end up dereferencing
-EFAULT.
Fixes: a16039cbf1 ('ALSA: line6: Add hwdep interface to access the POD control messages')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is a fix for Linux 4.9-rc1.
In former commit, a function call of compatibility layer for ALSA sequencer
core was obsoleted by an alternative. Although, the alternative gets a
pointer to kernel stack due to mis-programming. As a result, ALSA sequencer
core unexpectedly refers over kernel stack.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 8ce8eb601c ("ALSA: seq: add an alternative way to handle ioctl requests")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
On a Dell laptop, there is no global adcs for all input devices, so
the input devices use the different adc, as a result, dyn_adc_switch
is set to true.
In this situation, it is safe to control the micmute led according to
user's choice of muting/unmuting the current input device, since only
current input device path is active, while other input device paths
are inactive and powered down.
Fixes: 00ef99408b ('ALSA: hda - add mic mute led hook for dell machines')
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Pull thermal managament updates from Zhang Rui:
- Enhance thermal "userspace" governor to export the reason when a
thermal event is triggered and delivered to user space. From Srinivas
Pandruvada
- Introduce a single TSENS thermal driver for the different versions of
the TSENS IP that exist, on different qcom msm/apq SoCs'. Support for
msm8916, msm8960, msm8974 and msm8996 families is also added. From
Rajendra Nayak
- Introduce hardware-tracked trip points support to the device tree
thermal sensor framework. The framework supports an arbitrary number
of trip points. Whenever the current temperature is changed, the trip
points immediately below and above the current temperature are found,
driver callback is invoked to program the hardware to get notified
when either of the two trip points are triggered. Hardware-tracked
trip points support for rockchip thermal driver is also added at the
same time. From Sascha Hauer, Caesar Wang
- Introduce a new thermal driver, which enables TMU (Thermal Monitor
Unit) on QorIQ platform. From Jia Hongtao
- Introduce a new thermal driver for Maxim MAX77620. From Laxman
Dewangan
- Introduce a new thermal driver for Intel platforms using WhiskeyCove
PMIC. From Bin Gao
- Add mt2701 chip support to MTK thermal driver. From Dawei Chien
- Enhance Tegra thermal driver to enable soctherm node and set
"critical", "hot" trips, for Tegra124, Tegra132, Tegra210. From Wei
Ni
- Add resume support for tango thermal driver. From Marc Gonzalez
- several small fixes and improvements for rockchip, qcom, imx, rcar,
mtk thermal drivers and thermal core code. From Caesar Wang, Keerthy,
Rocky Hao, Wei Yongjun, Peter Robinson, Bui Duc Phuc, Axel Lin, Hugh
Kang
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (48 commits)
thermal: int3403: Process trip change notification
thermal: int340x: New Interface to read trip and notify
thermal: user_space gov: Add additional information in uevent
thermal: Enhance thermal_zone_device_update for events
arm64: tegra: set hot trips for Tegra210
arm64: tegra: set critical trips for Tegra210
arm64: tegra: add soctherm node for Tegra210
arm64: tegra: set hot trips for Tegra132
arm64: tegra: set critical trips for Tegra132
arm64: tegra: use tegra132-soctherm for Tegra132
arm: tegra: set hot trips for Tegra124
arm: tegra: set critical trips for Tegra124
thermal: tegra: add hw-throttle for Tegra132
thermal: tegra: add hw-throttle function
of: Add bindings of hw throttle for Tegra soctherm
thermal: mtk_thermal: Check return value of devm_thermal_zone_of_sensor_register
thermal: Add Mediatek thermal driver for mt2701.
dt-bindings: thermal: Add binding document for Mediatek thermal controller
thermal: max77620: Add thermal driver for reporting junction temp
thermal: max77620: Add DT binding doc for thermal driver
...
This affectively reverts commit 377ccbb483 ("Makefile: Mute warning
for __builtin_return_address(>0) for tracing only") because it turns out
that it really isn't tracing only - it's all over the tree.
We already also had the warning disabled separately for mm/usercopy.c
(which this commit also removes), and it turns out that we will also
want to disable it for get_lock_parent_ip(), that is used for at least
TRACE_IRQFLAGS. Which (when enabled) ends up being all over the tree.
Steven Rostedt had a patch that tried to limit it to just the config
options that actually triggered this, but quite frankly, the extra
complexity and abstraction just isn't worth it. We have never actually
had a case where the warning is actually useful, so let's just disable
it globally and not worry about it.
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add mount option "max_credits" to allow setting maximum SMB3
credits to any value from 10 to 64000 (default is 32000).
This can be useful to workaround servers with problems allocating
credits, or to throttle the client to use smaller amount of
simultaneous i/o or to workaround server performance issues.
Also adds a cap, so that even if the server granted us more than
65000 credits due to a server bug, we would not use that many.
Signed-off-by: Steve French <steve.french@primarydata.com>
Continuous Availability features like persistent handles
require that clients reconnect their open files, not
just the sessions, soon after the network connection comes
back up, otherwise the server will throw away the state
(byte range locks, leases, deny modes) on those handles
after a timeout.
Add code to reconnect handles when use_persistent set
(e.g. Continuous Availability shares) after tree reconnect.
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Germano Percossi <germano.percossi@citrix.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Remove the global file_list_lock to simplify cifs/smb3 locking and
have spinlocks that more closely match the information they are
protecting.
Add new tcon->open_file_lock and file->file_info_lock spinlocks.
Locks continue to follow a heirachy,
cifs_socket --> cifs_ses --> cifs_tcon --> cifs_file
where global tcp_ses_lock still protects socket and cifs_ses, while the
the newer locks protect the lower level structure's information
(tcon and cifs_file respectively).
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <steve.french@primarydata.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Germano Percossi <germano.percossi@citrix.com>
Patch a6b5058 results in -EREMOTE returned by is_path_accessible() in
cifs_mount() to be ignored which breaks DFS mounting.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
When we open a durable handle we give a Globally Unique
Identifier (GUID) to the server which we must keep for later reference
e.g. when reopening persistent handles on reconnection.
Without this the GUID generated for a new persistent handle was lost and
16 zero bytes were used instead on re-opening.
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
GUIDs although random, and 16 bytes, need to be generated as
proper uuids.
Signed-off-by: Steve French <steve.french@primarydata.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reported-by: David Goebels <davidgoe@microsoft.com>
CC: Stable <stable@vger.kernel.org>
The kernel client requests 2 credits for many operations even though
they only use 1 credit (presumably to build up a buffer of credit).
Some servers seem to give the client as much credit as is requested. In
this case, the amount of credit the client has continues increasing to
the point where (server->credits * MAX_BUFFER_SIZE) overflows in
smb2_wait_mtu_credits().
Fix this by throttling the credit requests if an set limit is reached.
For async requests where the credit charge may be > 1, request as much
credit as what is charged.
The limit is chosen somewhat arbitrarily. The Windows client
defaults to 128 credits, the Windows server allows clients up to
512 credits (or 8192 for Windows 2016), and the NetApp server
(and at least one other) does not limit clients at all.
Choose a high enough value such that the client shouldn't limit
performance.
This behavior was seen with a NetApp filer (NetApp Release 9.0RC2).
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
In debugging smb3, it is useful to display the number
of credits available, so we can see when the server has not granted
sufficient operations for the client to make progress, or alternatively
the client has requested too many credits (as we saw in a recent bug)
so we can compare with the number of credits the server thinks
we have.
Add a /proc/fs/cifs/DebugData line to display the client view
on how many credits are available.
Signed-off-by: Steve French <steve.french@primarydata.com>
Reported-by: Germano Percossi <germano.percossi@citrix.com>
CC: Stable <stable@vger.kernel.org>
Add parsing for new pseudo-xattr user.cifs.creationtime file
attribute to allow backup and test applications to view
birth time of file on cifs/smb3 mounts.
Signed-off-by: Steve French <steve.french@primarydata.com>
