Make the code that parses UTP transfer request headers easier to read by
using u8 instead of __be32 where appropriate.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-13-bvanassche@acm.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Make the code that initializes UTP transfer request headers easier to read
by using bitfields instead of __le32 where appropriate.
Cc: "Bao D. Nguyen" <quic_nguyenb@quicinc.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-12-bvanassche@acm.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Remove the 'response' member variable because no code reads its value.
Additionally, move the ufs_query_req and ufs_query_res data structure
definitions into include/ufs/ufshcd.h because these data structures are
related to the UFS host controller driver.
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-11-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Unify the MCQ and legacy code paths. This patch reworks code introduced by
commit ab248643d3 ("scsi: ufs: core: Add error handling for MCQ mode").
Cc: "Bao D. Nguyen" <quic_nguyenb@quicinc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-10-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
No functionality is changed. This patch prepares for unifying the MCQ and
legacy code paths in this function.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-9-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Assign names to the enumeration types for UPIU types. Use these enumeration
types where appropriate.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-8-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use { } instead of { { 0 }, } to zero-initialize data structures on the
stack. This patch fixes two W=2 warnings.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-7-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Only #include those header files that are needed.
Note: include/ufs/ufshcd.h needs <scsi/scsi_host.h> because of SG_ALL.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-6-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch suppresses the following W=2 warning:
drivers/ufs/core/ufs-hwmon.c:130:49: warning: declaration of ‘_data’ shadows a global declaration [-Wshadow]
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-5-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use 'Return:' to document the return value instead of 'Returns' as required
by the kernel-doc documentation.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230727194457.3152309-2-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Qcom SoCs require scaling the interconnect paths for proper working of the
peripherals connected through interconnects. Even for accessing the UFS
controller, someone should setup the interconnect paths. So far, the
bootloaders used to setup the interconnect paths before booting Linux as
they need to access the UFS storage for things like fetching boot firmware.
But with the advent of multi boot options, bootloader nowadays like in
SA8540p SoC do not setup the interconnect paths at all.
So trying to configure UFS in the absence of the interconnect path
configuration results in a boot crash.
To fix this issue, and also to dynamically scale the interconnects (UFS-DDR
and CPU-UFS), interconnect API support is added to the Qcom UFS driver.
With this support, the interconnect paths are scaled dynamically based on
the gear configuration.
During the early stage of ufs_qcom_init(), ufs_qcom_icc_init() will setup
the paths to max bandwidth to allow configuring the UFS registers. Touching
the registers without configuring the icc paths would result in a crash.
However, we don't really need to set max vote for the icc paths as any
minimal vote would suffice. But the max value would allow initialization to
be done faster. After init, the bandwidth will get updated using
ufs_qcom_icc_update_bw() based on the gear and lane configuration.
The bandwidth values defined in ufs_qcom_bw_table struct are taken from
Qcom downstream vendor devicetree source and are calculated as per the
UFS3.1 Spec, Section 6.4.1, HS Gear Rates. So it is fixed across platforms.
Cc: Brian Masney <bmasney@redhat.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20230731145020.41262-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since there are enums available for UFS gears, let's add enums for lanes as
well to maintain uniformity.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20230731145020.41262-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The qedf_dbg_fp_int_cmd_read() function invokes sprintf() directly on a
__user pointer, which may crash the kernel.
Avoid doing that by vmalloc()'ating a buffer for scnprintf() and then
calling simple_read_from_buffer() which does a proper copy_to_user() call.
Fixes: 61d8658b4a ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Link: https://lore.kernel.org/lkml/20230724120241.40495-1-oleksandr@redhat.com/
Link: https://lore.kernel.org/linux-scsi/20230726101236.11922-1-skashyap@marvell.com/
Cc: Saurav Kashyap <skashyap@marvell.com>
Cc: Rob Evers <revers@redhat.com>
Cc: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Jozef Bacik <jobacik@redhat.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com>
Link: https://lore.kernel.org/r/20230731084034.37021-4-oleksandr@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The qedf_dbg_debug_cmd_read() function invokes sprintf() directly on a
__user pointer, which may crash the kernel.
Avoid doing that by using a small on-stack buffer for scnprintf() and then
calling simple_read_from_buffer() which does a proper copy_to_user() call.
Fixes: 61d8658b4a ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Link: https://lore.kernel.org/lkml/20230724120241.40495-1-oleksandr@redhat.com/
Link: https://lore.kernel.org/linux-scsi/20230726101236.11922-1-skashyap@marvell.com/
Cc: Saurav Kashyap <skashyap@marvell.com>
Cc: Rob Evers <revers@redhat.com>
Cc: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Jozef Bacik <jobacik@redhat.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com>
Link: https://lore.kernel.org/r/20230731084034.37021-3-oleksandr@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The qedf_dbg_stop_io_on_error_cmd_read() function invokes sprintf()
directly on a __user pointer, which may crash the kernel.
Avoid doing that by using a small on-stack buffer for scnprintf() and then
calling simple_read_from_buffer() which does a proper copy_to_user() call.
Fixes: 61d8658b4a ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Link: https://lore.kernel.org/lkml/20230724120241.40495-1-oleksandr@redhat.com/
Link: https://lore.kernel.org/linux-scsi/20230726101236.11922-1-skashyap@marvell.com/
Cc: Saurav Kashyap <skashyap@marvell.com>
Cc: Rob Evers <revers@redhat.com>
Cc: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Jozef Bacik <jobacik@redhat.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Cc: linux-scsi@vger.kernel.org
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Oleksandr Natalenko <oleksandr@redhat.com>
Link: https://lore.kernel.org/r/20230731084034.37021-2-oleksandr@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add a check for the command slot value to avoid dereferencing a NULL
pointer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Co-developed-by: Vladimir Telezhnikov <vtelezhnikov@astralinux.ru>
Signed-off-by: Vladimir Telezhnikov <vtelezhnikov@astralinux.ru>
Signed-off-by: Alexandra Diupina <adiupina@astralinux.ru>
Link: https://lore.kernel.org/r/20230728123521.18293-1-adiupina@astralinux.ru
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
fnic_clean_pending_aborts() was returning a non-zero value irrespective of
failure or success. This caused the caller of this function to assume that
the device reset had failed, even though it would succeed in most cases. As
a consequence, a successful device reset would escalate to host reset.
Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Tested-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://lore.kernel.org/r/20230727193919.2519-1-kartilak@cisco.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
If a send packet is dropped by the IP layer in rxe_requester()
the call to rxe_xmit_packet() can fail with err == -EAGAIN.
To recover, the state of the wqe is restored to the state before
the packet was sent so it can be resent. However, the routines
that save and restore the state miss a significnt part of the
variable state in the wqe, the dma struct which is used to process
through the sge table. And, the state is not saved before the packet
is built which modifies the dma struct.
Under heavy stress testing with many QPs on a fast node sending
large messages to a slow node dropped packets are observed and
the resent packets are corrupted because the dma struct was not
restored. This patch fixes this behavior and allows the test cases
to succeed.
Fixes: 3050b99850 ("IB/rxe: Fix race condition between requester and completer")
Link: https://lore.kernel.org/r/20230721200748.4604-1-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This patch corrects an error in rxe_modify_srq where if the
caller changes the srq size the actual new value is not returned
to the caller since it may be larger than what is requested.
Additionally it open codes the subroutine rcv_wqe_size() which
adds very little value, and makes some whitespace changes.
Fixes: 8700e3e7c4 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20230620140142.9452-1-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This patch:
- Moves code to initialize a qp send work queue to a
subroutine named rxe_init_sq.
- Moves code to initialize a qp recv work queue to a
subroutine named rxe_init_rq.
- Moves initialization of qp request and response packet
queues ahead of work queue initialization so that cleanup
of a qp if it is not fully completed can successfully
attempt to drain the packet queues without a seg fault.
- Makes minor whitespace cleanups.
Fixes: 8700e3e7c4 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20230620135519.9365-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Acked-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Hyper-V provides the ability to connect Fibre Channel LUNs to the host
system and present them in a guest VM as a SCSI device. I/O to the vFC
device is handled by the storvsc driver. The storvsc driver includes a
partial integration with the FC transport implemented in the generic
portion of the Linux SCSI subsystem so that FC attributes can be displayed
in /sys. However, the partial integration means that some aspects of vFC
don't work properly. Unfortunately, a full and correct integration isn't
practical because of limitations in what Hyper-V provides to the guest.
In particular, in the context of Hyper-V storvsc, the FC transport timeout
function fc_eh_timed_out() causes a kernel panic because it can't find the
rport and dereferences a NULL pointer. The original patch that added the
call from storvsc_eh_timed_out() to fc_eh_timed_out() is faulty in this
regard.
In many cases a timeout is due to a transient condition, so the situation
can be improved by just continuing to wait like with other I/O requests
issued by storvsc, and avoiding the guaranteed panic. For a permanent
failure, continuing to wait may result in a hung thread instead of a panic,
which again may be better.
So fix the panic by removing the storvsc call to fc_eh_timed_out(). This
allows storvsc to keep waiting for a response. The change has been tested
by users who experienced a panic in fc_eh_timed_out() due to transient
timeouts, and it solves their problem.
In the future we may want to deprecate the vFC functionality in storvsc
since it can't be fully fixed. But it has current users for whom it is
working well enough, so it should probably stay for a while longer.
Fixes: 3930d73098 ("scsi: storvsc: use default I/O timeout handler for FC devices")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1690606764-79669-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Deferred-I/O generator macros generate callbacks for struct fb_ops
that operate on memory ranges in I/O address space or system address
space. Rename the macros to use the _IOMEM_ and _SYSMEM_ infixes of
their underlying helpers. Adapt all users. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230729193157.15446-5-tzimmermann@suse.de
Change the infix for fbdev's DMA-memory helpers from _DMA_ to
_DMAMEM_. The helpers perform operations within DMA-able memory,
but they don't perform DMA operations. Naming should make this
clear. Adapt all users. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230729193157.15446-4-tzimmermann@suse.de
Change the infix for fbdev's system-memory helpers from _SYS_ to
_SYSMEM_. The helpers perform operations within system memory, but
not on the state of the operating system itself. Naming should make
this clear. Adapt all users. No functional changes.
Suggested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230729193157.15446-3-tzimmermann@suse.de
Change the infix for fbdev's I/O-memory helpers from _IO_ to _IOMEM_
to distiguish them from other types of I/O, such as file operations.
The helpers operate on memory ranges in the I/O address space and the
naming should make this clear. Adapt all users. No functional changes.
Suggested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230729193157.15446-2-tzimmermann@suse.de
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
We implement a helper function to get number of codecs from ACPI
subsystem instead of using quirk flag in machine driver. Also refactor
module interface by adding max_98390_dai_link() function.
On the sof_rt5682 machine driver side, we remove the quirk flag
SOF_MAX98390_TWEETER_SPEAKER_PRESENT and use the new interface of
max98390 to setup dai link.
Signed-off-by: Brent Lu <brent.lu@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230731103419.2536036-2-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Reiserfs file system is no longer supported and is going to be removed
in 2025 as stated in commit eb103a5164 ("reiserfs: Deprecate reiserfs").
Signed-off-by: Piotr Siminski <piotr.siminski@globallogic.com>
Reviewed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230720115445.15583-1-piotr.siminski@globallogic.com>
LKP reports below warning when building for RISC-V with randconfig
configuration.
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:4567:35: sparse:
sparse: incorrect type in argument 4 (different base types)
@@ expected restricted __le32 [usertype] *[assigned] ptr
@@ got unsigned int * @@
Type cast to fix this warning.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307260823.whMNpZ1C-lkp@intel.com/
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Link: https://lore.kernel.org/r/20230726051759.30038-1-sunilvl@ventanamicro.com
Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The connector type and pixel format are missing for this panel,
add them to prevent various drivers from failing to determine
either of those parameters.
Fixes: 7ee933a1d5 ("drm/panel: simple: Add support for AUO T215HVN01")
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230709134914.449328-1-marex@denx.de
Merge series from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:
These are part of "ASoC: add multi Component support" patch-set.
The patch-set supports below case as "2 Cards".
+-- basic board --------+
|+--------+ |
|| CPU ch0| <--> CodecA |
|| ch1| <-+ |
|+--------+ | |
+-------------|---------+
+-- expansion board ----+
| | |
| +-> CodecB|
+-----------------------+
Renesas sound driver and its Doc part were held for observation.
Rob mentioned that "definitions" vs "$defs". But I got error on "$defs",
no error on "definitions". I believe this change is not mandatory.
He also mentioned that "reg" is missing, but I also believe that "reg"
is automatically handled somehow/somewhere (I'm not sure detail, but other
reviewer indicated it before).
He also mentioned that "ports" and "port", but added new "ports" needs
special handling. Using "ports" vs "port" are different, not
compatible on this driver. This means we need both on Doc.
Thus, there is no update for these.
kprobe_args_char.tc, kprobe_args_string.tc has validation check
for tracefs_create_dir, for eventfs it should be eventfs_create_dir.
Link: https://lkml.kernel.org/r/1690568452-46553-11-git-send-email-akaher@vmware.com
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Co-developed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Tested-by: Ching-lin Yu <chinglinyu@google.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Konstantin Shelekhin <k.shelekhin@yadro.com> says:
This patch series cleanses iscsi_target_configfs.c of sprintf
usage. The first patch fixes the real problem, the second just makes
sure we are on the safe side from now on.
I've reproduced the issue fixed in the first patch by utilizing this
cool thing:
https://git.sr.ht/~kshelekhin/scapy-iscsi
Yeah, shameless promoting of my own tools, but I like the simplicity
of scapy and writing tests in C with libiscsi can be a little
cumbersome.
Check it out:
#!/usr/bin/env python3
# Let's cause some DoS in iSCSI target
import sys
from scapy.supersocket import StreamSocket
from scapy_iscsi.iscsi import *
cpr = {
"InitiatorName": "iqn.2016-04.com.open-iscsi:e476cd9e4e59",
"TargetName": "iqn.2023-07.com.example:target",
"HeaderDigest": "None",
"DataDigest": "None",
}
spr = {
"SessionType": "Normal",
"ErrorRecoveryLevel": 0,
"DefaultTime2Retain": 0,
"DefaultTime2Wait": 2,
"ImmediateData": "Yes",
"FirstBurstLength": 65536,
"MaxBurstLength": 262144,
"MaxRecvDataSegmentLength": 262144,
"MaxOutstandingR2T": 1,
}
if len(sys.argv) != 3:
print("usage: dos.py <host> <port>", file=sys.stderr)
exit(1)
host = sys.argv[1]
port = int(sys.argv[2])
isid = 0xB00B
tsih = 0
connections = []
for i in range(0, 127):
s = socket.socket()
s.connect((host, port))
s = StreamSocket(s, ISCSI)
ds = cpr if i > 0 else cpr | spr
lirq = ISCSI() / LoginRequest(isid=isid, tsih=tsih, cid=i, ds=kv2text(ds))
lirs = s.sr1(lirq)
tsih = lirs.tsih
connections.append(s)
input()
Link: https://lore.kernel.org/r/20230722152657.168859-1-k.shelekhin@yadro.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Get rid of sprintf() in favor of sysfs_emit(). The latter ensures not to
overflow the given buffer.
Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com>
Link: https://lore.kernel.org/r/20230722152657.168859-3-k.shelekhin@yadro.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The function lio_target_nacl_info_show() uses sprintf() in a loop to print
details for every iSCSI connection in a session without checking for the
buffer length. With enough iSCSI connections it's possible to overflow the
buffer provided by configfs and corrupt the memory.
This patch replaces sprintf() with sysfs_emit_at() that checks for buffer
boundries.
Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com>
Link: https://lore.kernel.org/r/20230722152657.168859-2-k.shelekhin@yadro.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Sort the list of kernel build options and hardware support options.
Add a comment that the list should be kept sorted instead of having
new options inserted willy nilly.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230725174247.32393-1-rdunlap@infradead.org
Up until now, /sys/kernel/tracing/events was no different than any other
part of tracefs. The files and directories within the events directory was
created when the tracefs was mounted, and also created for the instances in
/sys/kernel/tracing/instances/<instance>/events. Most of these files and
directories will never be referenced. Since there are thousands of these
files and directories they spend their time wasting precious memory
resources.
Move the "events" directory to the new eventfs. The eventfs will take the
meta data of the events that they represent and store that. When the files
in the events directory are referenced, the dentry and inodes to represent
them are then created. When the files are no longer referenced, they are
freed. This saves the precious memory resources that were wasted on these
seldom referenced dentries and inodes.
Running the following:
~# cat /proc/meminfo /proc/slabinfo > before.out
~# mkdir /sys/kernel/tracing/instances/foo
~# cat /proc/meminfo /proc/slabinfo > after.out
to test the changes produces the following deltas:
Before this change:
Before after deltas for meminfo:
MemFree: -32260
MemAvailable: -21496
KReclaimable: 21528
Slab: 22440
SReclaimable: 21528
SUnreclaim: 912
VmallocUsed: 16
Before after deltas for slabinfo:
<slab>: <objects> [ * <size> = <total>]
tracefs_inode_cache: 14472 [* 1184 = 17134848]
buffer_head: 24 [* 168 = 4032]
hmem_inode_cache: 28 [* 1480 = 41440]
dentry: 14450 [* 312 = 4508400]
lsm_inode_cache: 14453 [* 32 = 462496]
vma_lock: 11 [* 152 = 1672]
vm_area_struct: 2 [* 184 = 368]
trace_event_file: 1748 [* 88 = 153824]
kmalloc-256: 1072 [* 256 = 274432]
kmalloc-64: 2842 [* 64 = 181888]
Total slab additions in size: 22,763,400 bytes
With this change:
Before after deltas for meminfo:
MemFree: -12600
MemAvailable: -12580
Cached: 24
Active: 12
Inactive: 68
Inactive(anon): 48
Active(file): 12
Inactive(file): 20
Dirty: -4
AnonPages: 68
KReclaimable: 12
Slab: 1856
SReclaimable: 12
SUnreclaim: 1844
KernelStack: 16
PageTables: 36
VmallocUsed: 16
Before after deltas for slabinfo:
<slab>: <objects> [ * <size> = <total>]
tracefs_inode_cache: 108 [* 1184 = 127872]
buffer_head: 24 [* 168 = 4032]
hmem_inode_cache: 18 [* 1480 = 26640]
dentry: 127 [* 312 = 39624]
lsm_inode_cache: 152 [* 32 = 4864]
vma_lock: 67 [* 152 = 10184]
vm_area_struct: -12 [* 184 = -2208]
trace_event_file: 1764 [* 96 = 169344]
kmalloc-96: 14322 [* 96 = 1374912]
kmalloc-64: 2814 [* 64 = 180096]
kmalloc-32: 1103 [* 32 = 35296]
kmalloc-16: 2308 [* 16 = 36928]
kmalloc-8: 12800 [* 8 = 102400]
Total slab additions in size: 2,109,984 bytes
Which is a savings of 20,653,416 bytes (20 MB) per tracing instance.
Link: https://lkml.kernel.org/r/1690568452-46553-10-git-send-email-akaher@vmware.com
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Co-developed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Tested-by: Ching-lin Yu <chinglinyu@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Commit e55b9f9686 ("mm: memcontrol: drop dead CONFIG_MEMCG_SWAP
config symbol") removed MEMCG_SWAP as it was just a shorthand for
CONFIG_MEMCG && CONFIG_SWAP.
The commit also adjusted the documentation but missed reference to
CONFIG_MEM_RES_CTRL_SWAP, which was the previous name of
CONFIG_MEMCG_SWAP before renaming in commit c255a45805 ("memcg: rename
config variables").
Update the reference to the current state.
Signed-off-by: Krzysztof Pawlaczyk <krzpaw@gmail.com>
Reviewed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230728105723.251892-1-krzpaw@gmail.com
In the process of parsing the DTS, check whether the memory region
specified by the DTS CMA node area overlaps with the kernel text
memory space reserved by memblock before calling
early_init_fdt_scan_reserved_mem.
Signed-off-by: Binglei Wang <l3b2w1@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
The kernel parameter 'cma_pernuma=' only supports reserving the same
size of CMA area for each node. We need to reserve different sizes of
CMA area for specified nodes if these devices belong to different nodes.
Adding another kernel parameter 'numa_cma=' to reserve CMA area for
the specified node. If we want to use one of these parameters, we need to
enable DMA_NUMA_CMA.
At the same time, print the node id in cma_declare_contiguous_nid() if
CONFIG_NUMA is enabled.
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: Christoph Hellwig <hch@lst.de>
In the commit b7176c261c ("dma-contiguous: provide the ability to
reserve per-numa CMA"), Barry adds DMA_PERNUMA_CMA for ARM64.
But this feature is architecture independent, so support per-numa CMA
for all architectures, and enable it by default if NUMA.
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Tested-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This function has a __weak definition and an override that is only used on
freescale powerpc chips. The powerpc definition however does not see the
declaration that is in a .c file:
arch/powerpc/kernel/dma-mask.c:7:6: error: no previous prototype for 'arch_dma_set_mask' [-Werror=missing-prototypes]
Move it into the linux/dma-map-ops.h header where the other arch_dma_* functions
are declared.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Drivers have no business looking at dma-mapping or swiotlb internals.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
