nfsd_breaker_owns_lease() currently open-codes the same test that
nfsd_v4client() performs.
With this patch we use nfsd_v4client() instead.
Also as i_am_nfsd() is only used in combination with kthread_data(),
replace it with nfsd_current_rqst() which combines the two and returns a
valid svc_rqst, or NULL.
The test for NULL is moved into nfsd_v4client() for code clarity.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
nfsd_permission(), exp_rdonly(), nfsd_setuser(), and nfsexp_flags()
only ever need the cred out of rqstp, so pass it explicitly instead of
the whole rqstp.
This makes the interfaces cleaner.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Rather than passing the whole rqst, pass the pieces that are actually
needed. This makes the inputs to rqst_exp_find() more obvious.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Move the stateid handling to nfsd4_copy_notify.
If nfs4_preprocess_stateid_op did not produce an output stateid, error out.
Copy notify specifically does not permit the use of special stateids,
so enforce that outside generic stateid pre-processing.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Olga Kornievskaia <aglo@umich.edu>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
If an svc thread needs to perform some initialisation that might fail,
it has no good way to handle the failure.
Before the thread can exit it must call svc_exit_thread(), but that
requires the service mutex to be held. The thread cannot simply take
the mutex as that could deadlock if there is a concurrent attempt to
shut down all threads (which is unlikely, but not impossible).
nfsd currently call svc_exit_thread() unprotected in the unlikely event
that unshare_fs_struct() fails.
We can clean this up by introducing svc_thread_init_status() by which an
svc thread can report whether initialisation has succeeded. If it has,
it continues normally into the action loop. If it has not,
svc_thread_init_status() immediately aborts the thread.
svc_start_kthread() waits for either of these to happen, and calls
svc_exit_thread() (under the mutex) if the thread aborted.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The only caller of svc_rqst_alloc() is svc_prepare_thread(). So merge
the one into the other and simplify.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
As documented in svc_xprt.c, sv_nrthreads is protected by the service
mutex, and it does not need ->sv_lock.
(->sv_lock is needed only for sv_permsocks, sv_tempsocks, and
sv_tmpcnt).
So remove the unnecessary locking.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
sp_nrthreads is only ever accessed under the service mutex
nlmsvc_mutex nfs_callback_mutex nfsd_mutex
so these is no need for it to be an atomic_t.
The fact that all code using it is single-threaded means that we can
simplify svc_pool_victim and remove the temporary elevation of
sp_nrthreads.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
The locking required for svc_exit_thread() is not obvious, so document
it in a kdoc comment.
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Instead of using kmalloc to allocate an array for storing active version
info, just declare an array to the max size - it is only 5 or so.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Physical addresses under IOVA on x86 platform are mapped contiguously
as a side effect before the patch that removed CONFIG_DMA_REMAP. The
NTB rx buffer ring is a single chunk DMA buffer that is allocated
against the NTB PCI device. If the receive side is using a DMA device,
then the buffers are remapped against the DMA device before being
submitted via the dmaengine API. This scheme becomes a problem when
the physical memory is discontiguous. When dma_map_page() is called
on the kernel virtual address from the dma_alloc_coherent() call, the
new IOVA mapping no longer points to all the physical memory allocated
due to being discontiguous. Change dma_alloc_coherent() to dma_alloc_attrs()
in order to force DMA_ATTR_FORCE_CONTIGUOUS attribute. This is the best
fix for the circumstance. A potential future solution may be having the DMA
mapping API providing a way to alias an existing IOVA mapping to a new
device perhaps.
This fix is not to fix the patch pointed to by the fixes tag, but to fix
the issue arised in the ntb_transport driver on x86 platforms after the
said patch is applied.
Reported-by: Jerry Dai <jerry.dai@intel.com>
Fixes: f5ff79fddf ("dma-mapping: remove CONFIG_DMA_REMAP")
Tested-by: Jerry Dai <jerry.dai@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
In the switchtec_ntb_add function, it can call switchtec_ntb_init_sndev
function, then &sndev->check_link_status_work is bound with
check_link_status_work. switchtec_ntb_link_notification may be called
to start the work.
If we remove the module which will call switchtec_ntb_remove to make
cleanup, it will free sndev through kfree(sndev), while the work
mentioned above will be used. The sequence of operations that may lead
to a UAF bug is as follows:
CPU0 CPU1
| check_link_status_work
switchtec_ntb_remove |
kfree(sndev); |
| if (sndev->link_force_down)
| // use sndev
Fix it by ensuring that the work is canceled before proceeding with
the cleanup in switchtec_ntb_remove.
Signed-off-by: Kaixin Wang <kxwang23@m.fudan.edu.cn>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The word 'swtich' is wrong, so fix it.
Signed-off-by: zhang jiao <zhangjiao2@cmss.chinamobile.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Use "/*" instead of "/**" for common C comments to prevent warnings
from scripts/kernel-doc.
ntb_hw_epf.c:15: warning: expecting prototype for Host side endpoint driver to implement Non(). Prototype was for NTB_EPF_COMMAND() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Allen Hubbe <allenbh@gmail.com>
Cc: ntb@lists.linux.dev
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Fix all kernel-doc warnings in ntb_transport.c.
The function parameters for ntb_transport_create_queue() changed, so
update them in the kernel-doc comments.
Add a Returns: comment for ntb_transport_register_client_dev().
ntb_transport.c:382: warning: No description found for return value of 'ntb_transport_register_client_dev'
ntb_transport.c:1984: warning: Excess function parameter 'rx_handler' description in 'ntb_transport_create_queue'
ntb_transport.c:1984: warning: Excess function parameter 'tx_handler' description in 'ntb_transport_create_queue'
ntb_transport.c:1984: warning: Excess function parameter 'event_handler' description in 'ntb_transport_create_queue'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Allen Hubbe <allenbh@gmail.com>
Cc: ntb@lists.linux.dev
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
'struct bus_type' is not modified in this driver.
Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.
On a x86_64, with allmodconfig:
Before:
======
text data bss dec hex filename
69682 4593 152 74427 122bb drivers/ntb/ntb_transport.o
5847 448 32 6327 18b7 drivers/ntb/core.o
After:
=====
text data bss dec hex filename
69858 4433 152 74443 122cb drivers/ntb/ntb_transport.o
6007 288 32 6327 18b7 drivers/ntb/core.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The correct printk format is %pa or %pap, but not %pa[p].
Fixes: 99a0605612 ("NTB: ntb_perf: Fix address err in perf_copy_chunk")
Signed-off-by: Max Hawking <maxahawking@sonnenkinder.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
The debugfs_create_dir() function returns error pointers.
It never returns NULL. So use IS_ERR() to check it.
Fixes: e26a5843f7 ("NTB: Split ntb_hw_intel and ntb_transport drivers")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
After twenty years of development we finally reached the point to enable
PREEMPT_RT support in the mainline kernel.
All prerequisites are merged, so enable it on the supported architectures
ARM64, RISCV and X86(32/64-bit).
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Merge tag 'sched-rt-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RT enablement from Thomas Gleixner:
"Enable PREEMPT_RT on supported architectures:
After twenty years of development we finally reached the point to
enable PREEMPT_RT support in the mainline kernel.
All prerequisites are merged, so enable it on the supported
architectures ARM64, RISCV and X86(32/64-bit)"
* tag 'sched-rt-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
riscv: Allow to enable PREEMPT_RT.
arm64: Allow to enable PREEMPT_RT.
x86: Allow to enable PREEMPT_RT.
- Add an ACS quirk for Qualcomm SA8775P, which doesn't advertise ACS but
does provide ACS-like features (Subramanian Ananthanarayanan)
- Mark Creative Labs EMU20k2 INTx masking as broken (Alex Williamson)
* pci/quirks:
PCI: Mark Creative Labs EMU20k2 INTx masking as broken
PCI: Add ACS quirk for Qualcomm SA8775P
- Fix off-by-one error in INTx IRQ handler that caused INTx interrupts to
be lost or delivered as the wrong interrupt (Sean Anderson)
- Rate-limit misc interrupt messages (Sean Anderson)
- Turn off the clock on probe failure and device removal (Sean Anderson)
- Add DT binding and driver support for enabling/disabling PHYs (Sean
Anderson)
- Add PCIe phy bindings for the ZCU102 (Sean Anderson)
- Add support for Xilinx QDMA Soft IP PCIe Root Port Bridge to DT binding
and xilinx-dma-pl driver (Thippeswamy Havalige)
* pci/controller/xilinx:
PCI: xilinx-xdma: Add Xilinx QDMA Root Port driver
dt-bindings: PCI: xilinx-xdma: Add schemas for Xilinx QDMA PCIe Root Port Bridge
arm64: zynqmp: Add PCIe phys property for ZCU102
PCI: xilinx-nwl: Add PHY support
dt-bindings: pci: xilinx-nwl: Add phys property
PCI: xilinx-nwl: Clean up clock on probe failure/removal
PCI: xilinx-nwl: Rate-limit misc interrupt messages
PCI: xilinx-nwl: Fix register misspelling
PCI: xilinx-nwl: Fix off-by-one in INTx IRQ handler
- Drop endpoint redundant masking of global IRQ events (Manivannan
Sadhasivam)
- Clarify unknown global IRQ message and only log it once to avoid a flood
(Manivannan Sadhasivam)
- Add Manivannan Sadhasivam as maintainer of qcom endpoint driver
(Manivannan Sadhasivam)
- Add 'linux,pci-domain' property to endpoint DT binding (Manivannan
Sadhasivam)
- Assign PCI domain number for endpoint controllers (Manivannan Sadhasivam)
- Add 'qcom_pcie_ep' and the PCI domain number to IRQ names for endpoint
controller (Manivannan Sadhasivam)
- Add global SPI interrupt for PCIe link events to DT binding (Manivannan
Sadhasivam)
- Add global RC interrupt handler to handle 'Link up' events and
automatically enumerate hot-added devices (Manivannan Sadhasivam)
- Avoid mirroring of DBI and iATU register space so it doesn't overlap BAR
MMIO space (Prudhvi Yarlagadda)
- Enable controller resources like PHY only after PERST# is deasserted to
partially avoid the problem that the endpoint SoC crashes when accessing
things when Refclk is absent (Manivannan Sadhasivam)
- Rename dw_pcie.link_gen to max_link_speed to avoid ambiguity (Manivannan
Sadhasivam)
- Cache maximum link speed value in dw_pcie.max_link_speed for use by
vendor drivers (Manivannan Sadhasivam)
- Add 16.0 GT/s equalization and RX lane margining settings (Shashank Babu
Chinta Venkata)
- Pass domain number to pci_bus_release_domain_nr() explicitly to avoid a
NULL pointer dereference (Manivannan Sadhasivam)
* pci/controller/qcom:
PCI: Pass domain number to pci_bus_release_domain_nr() explicitly
PCI: qcom: Add RX lane margining settings for 16.0 GT/s
PCI: qcom: Add equalization settings for 16.0 GT/s
PCI: dwc: Always cache the maximum link speed value in dw_pcie::max_link_speed
PCI: dwc: Rename 'dw_pcie::link_gen' to 'dw_pcie::max_link_speed'
PCI: qcom-ep: Enable controller resources like PHY only after refclk is available
PCI: qcom: Disable mirroring of DBI and iATU register space in BAR region
PCI: qcom: Enumerate endpoints based on Link up event in 'global_irq' interrupt
dt-bindings: PCI: qcom,pcie-sm8450: Add 'global' interrupt
PCI: qcom-ep: Modify 'global_irq' and 'perst_irq' IRQ device names
PCI: endpoint: Assign PCI domain number for endpoint controllers
dt-bindings: PCI: pci-ep: Document 'linux,pci-domain' property
dt-bindings: PCI: pci-ep: Update Maintainers
PCI: qcom-ep: Reword the error message for receiving unknown global IRQ event
PCI: qcom-ep: Drop the redundant masking of global IRQ events
- Increase max PCI hosts to 8 for Loongson-3C6000 and newer chipsets
(Huacai Chen)
* pci/controller/loongson:
PCI/ACPI: Increase Loongson max PCI hosts to 8
- Add DT "ti,syscon-acspcie-proxy-ctrl" and driver support to enable the
ACSPCIE module to drive Refclk for the Endpoint (Siddharth Vadapalli)
- Extract the cadence link setup from cdns_pcie_host_setup() so link setup
can be done separately during resume (Thomas Richard)
- Use dev_err_probe() to simplify j721e probe (Thomas Richard)
- Add T_PERST_CLK_US definition for the mandatory delay between Refclk
becoming stable and PERST# being deasserted (Thomas Richard)
- Add j721e suspend and resume support (Théo Lebrun)
* pci/controller/j721e:
PCI: j721e: Add suspend and resume support
PCI: j721e: Use T_PERST_CLK_US macro
PCI: Add T_PERST_CLK_US macro
PCI: j721e: Add reset GPIO to struct j721e_pcie
PCI: j721e: Use dev_err_probe() in the probe() function
PCI: cadence: Set cdns_pcie_host_init() global
PCI: cadence: Extract link setup sequence from cdns_pcie_host_setup()
PCI: j721e: Enable ACSPCIE Refclk if "ti,syscon-acspcie-proxy-ctrl" exists
dt-bindings: PCI: ti,j721e-pci-host: Add ACSPCIE proxy control property
- Fix a code restructuring error that caused i.MX8MM and i.MX8MP Endpoints
to fail to establish link (Richard Zhu)
- Fix i.MX8MP Endpoint occasional failure to trigger MSI by enforcing
outbound alignment requirement (Richard Zhu)
- Call phy_power_off() in the .probe() error path (Frank Li)
- Rename internal names from imx6_* to imx_* since i.MX7/8/9 are also
supported (Frank Li)
- Manage Refclk by using SoC-specific callbacks instead of switch
statements (Frank Li)
- Manage core reset by using SoC-specific callbacks instead of switch
statements (Frank Li)
- Expand comments for erratum ERR010728 workaround (Frank Li)
- Use generic PHY APIs to configure mode, speed, and submode, which is
harmless for devices that implement their own internal PHY management and
don't set the generic imx_pcie->phy (Frank Li)
- Add i.MX8Q (i.MX8QM, i.MX8QXP, and i.MX8DXL) DT binding and driver Root
Complex support (Richard Zhu)
* pci/controller/imx6:
PCI: imx6: Add i.MX8Q PCIe Root Complex (RC) support
PCI: imx6: Call common PHY API to set mode, speed, and submode
dt-bindings: PCI: imx6q-pcie: Add i.MX8Q PCIe compatible string
PCI: imx6: Consolidate redundant if-checks
PCI: imx6: Improve comment for workaround ERR010728
PCI: imx6: Simplify switch-case logic by involve core_reset callback
PCI: imx6: Introduce SoC specific callbacks for controlling REFCLK
PCI: imx6: Rename imx6_* with imx_*
PCI: imx6: Fix missing call to phy_power_off() in error handling
PCI: imx6: Fix i.MX8MP PCIe EP's occasional failure to trigger MSI
PCI: imx6: Fix establish link failure in EP mode for i.MX8MM and i.MX8MP
- Request IRQF_ONESHOT for 'dra7xx-pcie-main' IRQ since the primary handler
is NULL (Siddharth Vadapalli)
- Handle IRQ request errors during root port and endpoint probe (Siddharth
Vadapalli)
* pci/controller/dra7xx:
PCI: dra7xx: Fix error handling when IRQ request fails in probe
PCI: dra7xx: Fix threaded IRQ request for "dra7xx-pcie-main" IRQ
- Change DT binding maintainer to Jim Quinlan (Jim Quinlan)
- Add DT binding maxItems for reset controllers (Jim Quinlan)
- Refactor .probe() error handling (Jim Quinlan)
- Use the 'bridge' reset method if described in the DT (Jim Quinlan)
- Use the 'swinit' reset method if described in the DT (Jim Quinlan)
- Add SoC-specific HARD_DEBUG, INTR2_CPU_BASE register offsets (Jim
Quinlan)
- Drop unused RGR1_SW_INIT_1_INIT_MASK, RGR1_SW_INIT_1_INIT_SHIFT offsets
(Jim Quinlan)
- Add 'has_phy' so the existence of a 'rescal' reset controller doesn't
imply software control of it (Jim Quinlan)
- Add support for many inbound DMA windows (Jim Quinlan)
- Check return values of all reset_control_*() calls (Jim Quinlan)
- Rename SoC 'type' to 'soc_base' express the fact that SoCs come in
families of multiple similar devices (Jim Quinlan)
- Add Broadcom 7712 DT description and driver support (Jim Quinlan)
- Sort enums, pcie_offsets[], pcie_cfg_data, .compatible strings for
maintainability (Bjorn Helgaas)
* pci/controller/brcmstb:
PCI: brcmstb: Sort enums, pcie_offsets[], pcie_cfg_data, .compatible strings
PCI: brcmstb: Enable 7712 SoCs
PCI: brcmstb: Change field name from 'type' to 'soc_base'
PCI: brcmstb: Check return value of all reset_control_* calls
PCI: brcmstb: Refactor for chips with many regular inbound windows
PCI: brcmstb: Don't conflate the reset rescal with PHY ctrl
PCI: brcmstb: Remove two unused constants from driver
PCI: brcmstb: PCI: brcmstb: Make HARD_DEBUG, INTR2_CPU_BASE offsets SoC-specific
PCI: brcmstb: Use swinit reset if available
PCI: brcmstb: Use bridge reset if available
PCI: brcmstb: Use common error handling code in brcm_pcie_probe()
dt-bindings: PCI: brcm,stb-pcie: Add 7712 SoC description
dt-bindings: PCI: brcm,stb-pcie: Use maxItems for reset controllers
dt-bindings: PCI: brcm,stb-pcie: Change brcmstb maintainer and cleanup
- Replace TLP_REQ_ID() with macro PCI_DEVID(), which does the same thing
and is what other drivers use (Jinjie Ruan)
* pci/controller/altera:
PCI: altera: Replace TLP_REQ_ID() with macro PCI_DEVID()
- Add ARCH_PCI_DEV_GROUPS so s390 can add its own attribute_groups without
having to stomp on the core's pdev->dev.groups (Lukas Wunner)
* pci/sysfs:
s390/pci: Stop usurping pdev->dev.groups
- Wait for each level of downstream bus, not just the first, to become
accessible before restoring devices on that bus (Ilpo Järvinen)
* pci/reset:
PCI: Wait for Link before restoring Downstream Buses
- Initialize leds class earlier (with an unfortunate Makefile ordering
change) so the PCI NPEM driver can use it (Mariusz Tkaczyk)
- Add Native PCIe Enclosure Management (NPEM) support for sysfs control of
NVMe RAID storage indicators (ok/fail/locate/rebuild/etc) (Mariusz
Tkaczyk)
- Add support for the ACPI _DSM PCIe SSD status LED management, which is
functionally similar to NPEM but mediated by platform firmware (Mariusz
Tkaczyk)
* pci/npem:
PCI/NPEM: Add _DSM PCIe SSD status LED management
PCI/NPEM: Add Native PCIe Enclosure Management support
leds: Init leds class earlier
- Add function 0 DMA alias quirk for Glenfly Arise audio function, which
uses the function 0 Requester ID (WangYuli)
* pci/iommu:
PCI: Add function 0 DMA alias quirk for Glenfly Arise chip
- Clear LBMS bit after a manual link retrain so we don't try to retrain a
link when there's no downstream device anymore (Maciej W. Rozycki)
- Revert to the original link speed after retraining fails instead of
leaving it restricted to 2.5GT/s, so a future device has a chance to use
higher speeds (Maciej W. Rozycki)
- Correct interpretation of pcie_retrain_link() return status and update it
to return 0/errno instead of true/false (Maciej W. Rozycki)
* pci/enumeration:
PCI: Use an error code with PCIe failed link retraining
PCI: Correct error reporting with PCIe failed link retraining
PCI: Revert to the original speed after PCIe failed link retraining
PCI: Clear the LBMS bit after a link retrain
- Export pcim_request_region(), a managed counterpart of
pci_request_region(), for use by drivers (Philipp Stanner)
- Request the PCI BAR used by xboxvideo (Philipp Stanner)
- Export pcim_iomap_region() and deprecate pcim_iomap_regions() (Philipp
Stanner)
- Request and map drm/ast BARs with pcim_iomap_region() (Philipp Stanner)
* pci/devres:
drm/ast: Request PCI BAR with devres
PCI: Deprecate pcim_iomap_regions() in favor of pcim_iomap_region()
drm/vboxvideo: Add PCI region request
PCI: Make pcim_request_region() a public function
- Wait for device readiness after reset by polling Vendor ID and looking
for Configuration RRS instead of polling the Command register and looking
for non-error completions (Bjorn Helgaas)
- Fix an aardvark issue with emulating Configuration RRS for two-byte reads
of Vendor ID; previously it only worked for four-byte reads (Bjorn
Helgaas)
- Rename CRS Completion Status to RRS to match spec usage (Bjorn Helgaas)
* pci/crs:
PCI: Rename CRS Completion Status to RRS
PCI: aardvark: Correct Configuration RRS checking
PCI: Wait for device readiness with Configuration RRS
