If the file is written to and sync_state() hasn't been called for the
device yet, then call sync_state() for the device independent of the
state of its consumers.
This is useful for supplier devices that have one or more consumers that
don't have a driver but the consumers are in a state that don't use the
resources supplied by the supplier device.
This gives finer grained control than using the
fw_devlink.sync_state=timeout kernel commandline parameter.
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20230304005355.746421-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When all devices that could probe have finished probing (based on
deferred_probe_timeout configuration or late_initcall() when
!CONFIG_MODULES), this parameter controls what to do with devices that
haven't yet received their sync_state() calls.
fw_devlink.sync_state=strict is the default and the driver core will
continue waiting on all consumers of a device to probe successfully
before sync_state() is called for the device. This is the default
behavior since calling sync_state() on a device when all its consumers
haven't probed could make some systems unusable/unstable. When this
option is selected, we also print the list of devices that haven't had
sync_state() called on them by the time all devices the could probe have
finished probing.
fw_devlink.sync_state=timeout will cause the driver core to give up
waiting on consumers and call sync_state() on any devices that haven't
yet received their sync_state() calls. This option is provided for
systems that won't become unusable/unstable as they might be able to
save power (depends on state of hardware before kernel starts) if all
devices get their sync_state().
Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20230304005355.746421-2-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The filename "wangxun" sorts between "intel" and "xscale", but
xscale/Kconfig contains "Intel XScale" prompts, so Wangxun ends up in the
wrong place in the config front-ends.
Move wangxun/Kconfig so the Wangxun devices appear in order in the user
interface.
Fixes: 3ce7547e5b ("net: txgbe: Add build support for txgbe")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307221051.890135-1-helgaas@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2023-03-07 (igc)
This series contains updates to igc driver only.
Muhammad adds tracking and reporting of QBV config errors.
Tan Tee adds support for configuring max SDU for each Tx queue.
Sasha removes check for alternate media as only one media type is
supported.
* '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
igc: Clean up and optimize watchdog task
igc: offload queue max SDU from tc-taprio
igc: Add qbv_config_change_errors counter
====================
Link: https://lore.kernel.org/r/20230307221332.3997881-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Florian Westphal says:
====================
Netfilter updates for net-next
1. nf_tables 'brouting' support, from Sriram Yagnaraman.
2. Update bridge netfilter and ovs conntrack helpers to handle
IPv6 Jumbo packets properly, i.e. fetch the packet length
from hop-by-hop extension header, from Xin Long.
This comes with a test BIG TCP test case, added to
tools/testing/selftests/net/.
3. Fix spelling and indentation in conntrack, from Jeremy Sowden.
* 'main' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
netfilter: nat: fix indentation of function arguments
netfilter: conntrack: fix typo
selftests: add a selftest for big tcp
netfilter: use nf_ip6_check_hbh_len in nf_ct_skb_network_trim
netfilter: move br_nf_check_hbh_len to utils
netfilter: bridge: move pskb_trim_rcsum out of br_nf_check_hbh_len
netfilter: bridge: check len before accessing more nh data
netfilter: bridge: call pskb_may_pull in br_nf_check_hbh_len
netfilter: bridge: introduce broute meta statement
====================
Link: https://lore.kernel.org/r/20230308193033.13965-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
neigh_lookup_nodev isn't used in the kernel after removal
of DECnet. So let's remove it.
Fixes: 1202cdd665 ("Remove DECnet support from kernel")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/eb5656200d7964b2d177a36b77efa3c597d6d72d.1678267343.git.leonro@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
tcp_rtx_synack() now could be called in process context as explained in
0a375c8224 ("tcp: tcp_rtx_synack() can be called from process
context").
tcp_rtx_synack() might call tcp_make_synack(), which will touch per-CPU
variables with preemption enabled. This causes the following BUG:
BUG: using __this_cpu_add() in preemptible [00000000] code: ThriftIO1/5464
caller is tcp_make_synack+0x841/0xac0
Call Trace:
<TASK>
dump_stack_lvl+0x10d/0x1a0
check_preemption_disabled+0x104/0x110
tcp_make_synack+0x841/0xac0
tcp_v6_send_synack+0x5c/0x450
tcp_rtx_synack+0xeb/0x1f0
inet_rtx_syn_ack+0x34/0x60
tcp_check_req+0x3af/0x9e0
tcp_rcv_state_process+0x59b/0x2030
tcp_v6_do_rcv+0x5f5/0x700
release_sock+0x3a/0xf0
tcp_sendmsg+0x33/0x40
____sys_sendmsg+0x2f2/0x490
__sys_sendmsg+0x184/0x230
do_syscall_64+0x3d/0x90
Avoid calling __TCP_INC_STATS() with will touch per-cpu variables. Use
TCP_INC_STATS() which is safe to be called from context switch.
Fixes: 8336886f78 ("tcp: TCP Fast Open Server - support TFO listeners")
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230308190745.780221-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since commit 8b41fc4454 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Hitomi Hasegawa <hasegawa-hitomi@fujitsu.com>
Cc: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20230308121230.5354-1-nick.alcock@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since commit 8b41fc4454 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Hitomi Hasegawa <hasegawa-hitomi@fujitsu.com>
Cc: Jeremy Kerr <jk@codeconstruct.com.au>
Cc: Matt Johnston <matt@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20230308121230.5354-2-nick.alcock@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
More fixes that came in since -rc1, a lot from Intel - looks like
they've been busy test. Everything is driver specific.
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Merge tag 'asoc-fix-v6.3-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.3
More fixes that came in since -rc1, a lot from Intel - looks like
they've been busy test. Everything is driver specific.
When CONFIG_FUNCTION_GRAPH_TRACER is disabled, __kcfi_typeid_ftrace_stub_graph
is missing, causing a link failure:
ld.lld: error: undefined symbol: __kcfi_typeid_ftrace_stub_graph
referenced by arch/x86/kernel/ftrace_64.o:(__cfi_ftrace_stub_graph) in archive vmlinux.a
Mark the reference to it as conditional on the same symbol, as
is done on arm64.
Link: https://lore.kernel.org/linux-trace-kernel/20230131093643.3850272-1-arnd@kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Fixes: 883bbbffa5 ("ftrace,kcfi: Separate ftrace_stub() and ftrace_stub_graph()")
See-also: 2598ac6ec4 ("arm64: ftrace: Define ftrace_stub_graph only with FUNCTION_GRAPH_TRACER")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
KASAN reported follow problem:
BUG: KASAN: use-after-free in lookup_rec
Read of size 8 at addr ffff000199270ff0 by task modprobe
CPU: 2 Comm: modprobe
Call trace:
kasan_report
__asan_load8
lookup_rec
ftrace_location
arch_check_ftrace_location
check_kprobe_address_safe
register_kprobe
When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a
pg which is newly added to ftrace_pages_start in ftrace_process_locs().
Before the first pg->index++, index is 0 and accessing pg->records[-1].ip
will cause this problem.
Don't check the ip when pg->index is 0.
Link: https://lore.kernel.org/linux-trace-kernel/20230309080230.36064-1-chenzhongjin@huawei.com
Cc: stable@vger.kernel.org
Fixes: 9644302e33 ("ftrace: Speed up search by skipping pages by address")
Suggested-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
The function hist_field_name() cannot handle being passed a NULL field
parameter. It should never be NULL, but due to a previous bug, NULL was
passed to the function and the kernel crashed due to a NULL dereference.
Mark Rutland reported this to me on IRC.
The bug was fixed, but to prevent future bugs from crashing the kernel,
check the field and add a WARN_ON() if it is NULL.
Link: https://lkml.kernel.org/r/20230302020810.762384440@goodmis.org
Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Mark Rutland <mark.rutland@arm.com>
Fixes: c6afad49d1 ("tracing: Add hist trigger 'sym' and 'sym-offset' modifiers")
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Added the video capability query support for VCN version 4_0_4
Signed-off-by: Veerabadhran Gopalakrishnan <veerabadhran.gopalakrishnan@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.x
This patch fixes a return value check in kfd doorbell handling.
This function should return 0(error) only when the ida_simple_get
returns < 0(error), return > 0 is a success case.
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Fixes: 16f0013157 ("drm/amdkfd: Allocate doorbells only when needed")
Acked-by: Christian Koenig <chriatian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
The same strapping initialization issue that happened on NBIO 7.5.1
appears to be happening on NBIO 7.3.0.
Apply the same fix to 7.3.0 as well.
Note: This workaround relies upon the integrated GPU being enabled
in BIOS. If the integrated GPU is disabled in BIOS a different
workaround will be required.
Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Cc: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/linux-usb/Y%2Fz9GdHjPyF2rNG3@glanzmann.de/T/#u
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Bjorn Helgaas <helgaas@kernel.org> says:
Since f26e58bf6f ("PCI/AER: Enable error reporting when AER is native"),
which appeared in v6.0, the PCI core has enabled PCIe error reporting for
all devices during enumeration.
Remove driver code to do this and remove unnecessary includes of
<linux/aer.h> from several other drivers.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-11-helgaas@kernel.org
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Manish Rangankar <mrangankar@marvell.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-10-helgaas@kernel.org
Cc: Nilesh Javali <njavali@marvell.com>
Cc: GR-QLogic-Storage-Upstream@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-9-helgaas@kernel.org
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Cc: MPT-FusionLinux.pdl@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-8-helgaas@kernel.org
Cc: James Smart <james.smart@broadcom.com>
Cc: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Commit 105a3dbc74 ("hpsa: clean up driver init") added a comment about
pci_disable_pcie_error_reporting(), but hpsa has never called either
pci_enable_pcie_error_reporting() or pci_disable_pcie_error_reporting().
Since commit f26e58bf6f ("PCI/AER: Enable error reporting when AER is
native"), the PCI core is responsible for managing PCIe device error
reporting.
Remove the comment about pci_disable_pcie_error_reporting().
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-7-helgaas@kernel.org
Cc: Don Brace <don.brace@microchip.com>
Cc: storagedev@microchip.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-5-helgaas@kernel.org
Cc: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Cc: Sudarsana Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver. Also remove the corresponding pci_disable_pcie_error_reporting()
from the driver .remove() path.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-4-helgaas@kernel.org
Cc: Ketan Mukadam <ketan.mukadam@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_enable_pcie_error_reporting() enables the device to send ERR_*
Messages. Since commit f26e58bf6f ("PCI/AER: Enable error reporting when
AER is native"), the PCI core does this for all devices during enumeration,
so the driver doesn't need to do it itself.
Remove the redundant pci_enable_pcie_error_reporting() call from the
driver.
Note that this only controls ERR_* Messages from the device. An ERR_*
Message may cause the Root Port to generate an interrupt, depending on the
AER Root Error Command register managed by the AER service driver.
Also remove pci_disable_pcie_error_reporting() from the .error_detected()
path, which was added by commit 5c63f7f710 ("aacraid: Added EEH support")
but looks unnecessary. Error reporting will be disabled by the device
reset and will be re-enabled by the pci_restore_state() in
aac_pci_slot_reset().
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230307182842.870378-2-helgaas@kernel.org
Cc: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
Cc: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Cc: Tomas Henzl <thenzl@redhat.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
With latest llvm17, selftest fexit_bpf2bpf/func_replace_return_code
has the following verification failure:
0: R1=ctx(off=0,imm=0) R10=fp0
; int connect_v4_prog(struct bpf_sock_addr *ctx)
0: (bf) r7 = r1 ; R1=ctx(off=0,imm=0) R7_w=ctx(off=0,imm=0)
1: (b4) w6 = 0 ; R6_w=0
; memset(&tuple.ipv4.saddr, 0, sizeof(tuple.ipv4.saddr));
...
; return do_bind(ctx) ? 1 : 0;
179: (bf) r1 = r7 ; R1=ctx(off=0,imm=0) R7=ctx(off=0,imm=0)
180: (85) call pc+147
Func#3 is global and valid. Skipping.
181: R0_w=scalar()
181: (bc) w6 = w0 ; R0_w=scalar() R6_w=scalar(umax=4294967295,var_off=(0x0; 0xffffffff))
182: (05) goto pc-129
; }
54: (bc) w0 = w6 ; R0_w=scalar(umax=4294967295,var_off=(0x0; 0xffffffff)) R6_w=scalar(umax=4294967295,var_off=(0x0; 0xffffffff))
55: (95) exit
At program exit the register R0 has value (0x0; 0xffffffff) should have been in (0x0; 0x1)
processed 281 insns (limit 1000000) max_states_per_insn 1 total_states 26 peak_states 26 mark_read 13
-- END PROG LOAD LOG --
libbpf: prog 'connect_v4_prog': failed to load: -22
The corresponding source code:
__attribute__ ((noinline))
int do_bind(struct bpf_sock_addr *ctx)
{
struct sockaddr_in sa = {};
sa.sin_family = AF_INET;
sa.sin_port = bpf_htons(0);
sa.sin_addr.s_addr = bpf_htonl(SRC_REWRITE_IP4);
if (bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)) != 0)
return 0;
return 1;
}
...
SEC("cgroup/connect4")
int connect_v4_prog(struct bpf_sock_addr *ctx)
{
...
return do_bind(ctx) ? 1 : 0;
}
Insn 180 is a call to 'do_bind'. The call's return value is also the return value
for the program. Since do_bind() returns 0/1, so it is legitimate for compiler to
optimize 'return do_bind(ctx) ? 1 : 0' to 'return do_bind(ctx)'. However, such
optimization breaks verifier as the return value of 'do_bind()' is marked as any
scalar which violates the requirement of prog return value 0/1.
There are two ways to fix this problem, (1) changing 'return 1' in do_bind() to
e.g. 'return 10' so the compiler has to do 'do_bind(ctx) ? 1 :0', or (2)
suggested by Andrii, marking do_bind() with __weak attribute so the compiler
cannot make any assumption on do_bind() return value.
This patch adopted adding __weak approach which is simpler and more resistant
to potential compiler optimizations.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230310012410.2920570-1-yhs@fb.com
chenxiang <chenxiang66@hisilicon.com> says:
To support IO_URING IOPOLL support for hisi_sas, we need to:
- Add and fill mq_poll interface to poll queue;
- Ensure internal I/Os (including internal abort I/Os) are delivered and
completed through non-iopoll queue (queue 0);
Sending internal abort commands to non-poll queue actually requires to
sending the abort command to every queue. This carries a a risk. Make iopoll
support module parameter "experimental".
I have tested performance on v3 hw with different modes as follows. 4K
READs and 4K WRITEs both see an improvement when enabling poll mode:
4K READ 4K RANDREAD 4K WRITE 4K RANDWRITE
interrupt + libaio 1770k 1316k 1197k 831k
interrupt + io_uring 1848k 1390k 1238k 857k
iopoll + io_uring 2117k 1364k 1874k 849k
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Currently we sync irq to avoid freeing task before using task in I/O
completion. After adding io_uring support, we need to do something similar
for poll queues. As the process of CQ entries on poll queue are protected
by spinlock cq->lock, we can use spin_lock() + spin_unlock() on cq->lock to
make sure that CQ entries are processed to completion and then the complete
queue is synced.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1678169355-76215-4-git-send-email-chenxiang66@hisilicon.com
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add a module parameter to set how many queues are used for iopoll. Also
fill the interface mq_poll. For internal I/Os from libsas and libata we use
non-iopoll queue (queue 0) to deliver and complete them. But for internal
abort I/Os, just don't send them for poll queues.
There is still a risk associated as this sends internal abort commands to
non-iopoll queues which actually requires sending an internal abort command
to every queue. As a result, make the module parameter as "experimental"
for now.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1678169355-76215-3-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Put the work of processing cq slots in a separate function,
complete_v3_hw(), which can then be used by cq_thread_v3_hw() and other
functions when adding poll support.
Co-developed-by: John Garry <john.garry@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Link: https://lore.kernel.org/r/1678169355-76215-2-git-send-email-chenxiang66@hisilicon.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Dmitry Bogdanov <d.bogdanov@yadro.com> says:
SAM-5 4.6.5.2 (Relative Port Identifier attribute) defines the attribute as
unique across SCSI target ports:
The Relative Port Identifier attribute identifies a SCSI target port or a
SCSI initiator port relative to other SCSI ports in a SCSI target device
and any SCSI initiator devices contained within that SCSI target device. A
SCSI target device may assign relative port identifiers to its SCSI target
ports and any SCSI initiator ports. If relative port identifiers are
assigned, the SCSI target device shall assign each of its SCSI target
ports and any SCSI initiator ports a unique relative port identifier from
1 to 65 535. SCSI target ports and SCSI initiator ports share the same
number space.
In the current TCM implementation, auto-incremented lun_rtpi weakly follows
the model outlined by SAM-5 and SPC-4. In case of multiple SCSI target
ports (se_portal_groups), which is common to scenario with multiple HBAs or
multiple iSCSI/FC targets, it's possible to have two backstores (se_devices)
with different values of lun_rtpi on the same SCSI target port.
Similar issue happens during re-export. If a LUN of a backstore is removed
from a target port and added again to the same target port, RTPI is
incremented again and will be different from the first time.
The two issues happen because each se_device increments RTPI for its own
LUNs independently.
The behaviour means that a SCSI application client can't reliably make any
sense of RTPI values reported by a LUN as it's not really related to SCSI
target ports. A conforming target implementation must ensure that RTPI field
is unique per port. The patchset resolves the issue.
Make RTPI be part of se_tpg instead of se_lun. Make it configurable.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
RELATIVE TARGET PORT IDENTIFIER can be read and configured via configfs:
$ echo 0x10 > $TARGET/tpgt_N/rtpi
RTPI can be changed only on disabled target ports.
Co-developed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Link: https://lore.kernel.org/r/20230301084512.21956-5-d.bogdanov@yadro.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The code is not needed since target port-based RTPI allocation replaced it.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Link: https://lore.kernel.org/r/20230301084512.21956-4-d.bogdanov@yadro.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
