Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-nios2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull trivial nios2 cleanup from Al Viro.
* tag 'pull-nios2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
nios2: _TIF_ALLWORK_MASK is unused
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs pile from Al Viro.
Random minor cleanups.
* tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: Fix description of vfs_tmpfile()
sysv: switch to put_and_unmap_page()
fs/sysv: Don't round down address for kunmap_flush_on_unmap()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-old-dio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull legacy dio cleanup from Al Viro.
* tag 'pull-old-dio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
__blockdev_direct_IO(): get rid of submit_io callback
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-write-one-page' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs write_one_page removal from Al Viro:
"write_one_page series"
* tag 'pull-write-one-page' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
mm,jfs: move write_one_page/folio_write_one to jfs
ocfs2: don't use write_one_page in ocfs2_duplicate_clusters_by_page
ufs: don't flush page immediately for DIRSYNC directories
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fget updates from Al Viro:
"fget() to fdget() conversions"
* tag 'pull-fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fuse_dev_ioctl(): switch to fdget()
cgroup_get_from_fd(): switch to fdget_raw()
bpf: switch to fdget_raw()
build_mount_idmapped(): switch to fdget()
kill the last remaining user of proc_ns_fget()
SVM-SEV: convert the rest of fget() uses to fdget() in there
convert sgx_set_attribute() to fdget()/fdput()
convert setns(2) to fdget()/fdput()
When the action of an xdp program was XDP_TX, lan966x was creating
a xdp_frame and use this one to send the frame back. But it is also
possible to send back the frame without needing a xdp_frame, because
it is possible to send it back using the page.
And then once the frame is transmitted is possible to use directly
page_pool_recycle_direct as lan966x is using page pools.
This would save some CPU usage on this path, which results in higher
number of transmitted frames. Bellow are the statistics:
Frame size: Improvement:
64 ~8%
256 ~11%
512 ~8%
1000 ~0%
1500 ~0%
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20230422142344.3630602-1-horatiu.vultur@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Alexei Starovoitov says:
====================
pull-request: bpf-next 2023-04-24
We've added 5 non-merge commits during the last 3 day(s) which contain
a total of 7 files changed, 87 insertions(+), 44 deletions(-).
The main changes are:
1) Workaround for bpf iter selftest due to lack of subprog support
in precision tracking, from Andrii.
2) Disable bpf_refcount_acquire kfunc until races are fixed, from Dave.
3) One more test_verifier test converted from asm macro to asm in C,
from Eduard.
4) Fix build with NETFILTER=y INET=n config, from Florian.
5) Add __rcu_read_{lock,unlock} into deny list, from Yafang.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next:
selftests/bpf: avoid mark_all_scalars_precise() trigger in one of iter tests
bpf: Add __rcu_read_{lock,unlock} into btf id deny list
bpf: Disable bpf_refcount_acquire kfunc calls until race conditions are fixed
selftests/bpf: verifier/prevent_map_lookup converted to inline assembly
bpf: fix link failure with NETFILTER=y INET=n
====================
Link: https://lore.kernel.org/r/20230425005648.86714-1-alexei.starovoitov@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Gerhard Engleder says:
====================
tsnep: XDP socket zero-copy support
Implement XDP socket zero-copy support for tsnep driver. I tried to
follow existing drivers like igc as far as possible. But one main
difference is that tsnep does not need any reconfiguration for XDP BPF
program setup. So I decided to keep this behavior no matter if a XSK
pool is used or not. As a result, tsnep starts using the XSK pool even
if no XDP BPF program is available.
Another difference is that I tried to prevent potentially failing
allocations during XSK pool setup. E.g. both memory models for page pool
and XSK pool are registered all the time. Thus, XSK pool setup cannot
end up with not working queues.
Some prework is done to reduce the last two XSK commits to actual XSK
changes.
====================
Link: https://lore.kernel.org/r/20230421194656.48063-1-gerhard@engleder-embedded.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Send and complete XSK pool frames within TX NAPI context. NAPI context
is triggered by ndo_xsk_wakeup.
Test results with A53 1.2GHz:
xdpsock txonly copy mode, 64 byte frames:
pps pkts 1.00
tx 284,409 11,398,144
Two CPUs with 100% and 10% utilization.
xdpsock txonly zero-copy mode, 64 byte frames:
pps pkts 1.00
tx 511,929 5,890,368
Two CPUs with 100% and 1% utilization.
xdpsock l2fwd copy mode, 64 byte frames:
pps pkts 1.00
rx 248,985 7,315,885
tx 248,921 7,315,885
Two CPUs with 100% and 10% utilization.
xdpsock l2fwd zero-copy mode, 64 byte frames:
pps pkts 1.00
rx 254,735 3,039,456
tx 254,735 3,039,456
Two CPUs with 100% and 4% utilization.
Packet rate increases and CPU utilization is reduced in both cases.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add support for XSK zero-copy to RX path. The setup of the XSK pool can
be done at runtime. If the netdev is running, then the queue must be
disabled and enabled during reconfiguration. This can be done easily
with functions introduced in previous commits.
A more important property is that, if the netdev is running, then the
setup of the XSK pool shall not stop the netdev in case of errors. A
broken netdev after a failed XSK pool setup is bad behavior. Therefore,
the allocation and setup of resources during XSK pool setup is done only
before any queue is disabled. Additionally, freeing and later allocation
of resources is eliminated in some cases. Page pool entries are kept for
later use. Two memory models are registered in parallel. As a result,
the XSK pool setup cannot fail during queue reconfiguration.
In contrast to other drivers, XSK pool setup and XDP BPF program setup
are separate actions. XSK pool setup can be done without any XDP BPF
program. The XDP BPF program can be added, removed or changed without
any reconfiguration of the XSK pool.
Test results with A53 1.2GHz:
xdpsock rxdrop copy mode, 64 byte frames:
pps pkts 1.00
rx 856,054 10,625,775
Two CPUs with both 100% utilization.
xdpsock rxdrop zero-copy mode, 64 byte frames:
pps pkts 1.00
rx 889,388 4,615,284
Two CPUs with 100% and 20% utilization.
Packet rate increases and CPU utilization is reduced.
100% CPU load seems to the base load. This load is consumed by ksoftirqd
just for dropping the generated packets without xdpsock running.
Using batch API reduced CPU utilization slightly, but measurements are
not stable enough to provide meaningful numbers.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The function tsnep_rx_poll() is already pretty long and the skb receive
action can be reused for XSK zero-copy support. Move page based skb
receive to separate function.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move queue enable and disable code to separate functions. This way the
activation and deactivation of the queues are defined actions, which can
be used in future execution paths.
This functions will be used for the queue reconfiguration at runtime,
which is necessary for XSK zero-copy support.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Make initialization of TX and RX queues less dynamic by moving some
initialization from netdev open/close to device probing.
Additionally, move some initialization code to separate functions to
enable future use in other execution paths.
This is done as preparation for queue reconfigure at runtime, which is
necessary for XSK zero-copy support.
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
TX/RX ring size is static and power of 2 to enable compiler to optimize
modulo operation to mask operation. Make this optimization already in
the code and don't rely on the compiler.
CPU utilisation during high packet rate has not changed. So no
performance improvement has been measured. But it is best practice to
prevent modulo operations.
Suggested-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Up to 4 LEDs can be attached to the PHY, add support for setting
brightness manually.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230424134625.303957-1-alexander.stein@ew.tq-group.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
'reg' is always encoded in 32 bits, thus it has to be read using the
function with the corresponding bit width.
Fixes: 01e5b728e9 ("net: phy: Add a binding for PHY LEDs")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230424141648.317944-1-alexander.stein@ew.tq-group.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Smatch complains that:
nfcsim_debugfs_init_dev() warn: 'dev_dir' is an error pointer or valid
According to the documentation of the debugfs_create_dir() function,
there is no need to check the return value of this function.
Just delete the dead code.
Signed-off-by: Jianuo Kuang <u202110722@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230424024140.34607-1-u202110722@hust.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Pointer variables of void * type do not require type cast.
Signed-off-by: wuych <yunchuan@nfschina.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230424101550.664319-1-yunchuan@nfschina.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
SET_COALESCE may change operation mode and parameters in one call.
Changing operation mode may cause the driver to reset the parameter
values to what is a reasonable default for new operation mode.
Since driver does not know which parameters come from user and which
are echoed back from ->get, driver may ignore the parameters when
switching operation modes.
This used to be inevitable for ioctl() but in netlink we know which
parameters are actually specified by the user.
We could inform which parameters were set by the user but this would
lead to a lot of code duplication in the drivers. Instead try to call
the drivers twice if both mode and params are changed. The set method
already checks if any params need updating so in case the driver did
the right thing the first time around - there will be no second call
to it's ->set method (only an extra call to ->get()).
For mlx5 for example before this patch we'd see:
# ethtool -C eth0 adaptive-rx on adaptive-tx on
# ethtool -C eth0 adaptive-rx off adaptive-tx off \
tx-usecs 123 rx-usecs 123
Adaptive RX: off TX: off
rx-usecs: 3
rx-frames: 32
tx-usecs: 16
tx-frames: 32
[...]
After the change:
# ethtool -C eth0 adaptive-rx on adaptive-tx on
# ethtool -C eth0 adaptive-rx off adaptive-tx off \
tx-usecs 123 rx-usecs 123
Adaptive RX: off TX: off
rx-usecs: 123
rx-frames: 32
tx-usecs: 123
tx-frames: 32
[...]
This only works for netlink, so it's a small discrepancy between
netlink and ioctl(). Since we anticipate most users to move to
netlink I believe it's worth making their lives easier.
Link: https://lore.kernel.org/r/20230420233302.944382-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Haiyang Zhang says:
====================
Update coding style and check alloc_frag
Follow up patches for the jumbo frame support.
As suggested by Jakub Kicinski, update coding style, and check napi_alloc_frag
for possible fallback to single pages.
====================
Link: https://lore.kernel.org/r/1682096818-30056-1-git-send-email-haiyangz@microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
netdev/napi_alloc_frag() may fall back to single page which is smaller
than the requested size.
Add error checking to avoid memory overwritten.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Rename mana_refill_rxoob for naming consistency.
And remove some empty lines between function call and error
checking.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Lorenzo Bianconi says:
====================
add page_pool support for page recycling in veth driver
Introduce page_pool support in veth driver in order to recycle pages in
veth_convert_skb_to_xdp_buff routine and avoid reallocating the skb through
the page allocator when we run a xdp program on the device and we receive
skbs from the stack.
====================
Link: https://lore.kernel.org/r/cover.1682188837.git.lorenzo@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Introduce page_pool stats support to report info about local page_pool
through ethtool
Tested-by: Maryam Tahhan <mtahhan@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Introduce page_pool support in veth driver in order to recycle pages
in veth_convert_skb_to_xdp_buff routine and avoid reallocating the skb
through the page allocator.
The patch has been tested sending tcp traffic to a veth pair where the
remote peer is running a simple xdp program just returning xdp_pass:
veth upstream codebase:
MTU 1500B: ~ 8Gbps
MTU 8000B: ~ 13.9Gbps
veth upstream codebase + pp support:
MTU 1500B: ~ 9.2Gbps
MTU 8000B: ~ 16.2Gbps
Tested-by: Maryam Tahhan <mtahhan@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Brad Spencer provided a detailed report [0] that when calling getsockopt()
for AF_NETLINK, some SOL_NETLINK options set only 1 byte even though such
options require at least sizeof(int) as length.
The options return a flag value that fits into 1 byte, but such behaviour
confuses users who do not initialise the variable before calling
getsockopt() and do not strictly check the returned value as char.
Currently, netlink_getsockopt() uses put_user() to copy data to optlen and
optval, but put_user() casts the data based on the pointer, char *optval.
As a result, only 1 byte is set to optval.
To avoid this behaviour, we need to use copy_to_user() or cast optval for
put_user().
Note that this changes the behaviour on big-endian systems, but we document
that the size of optval is int in the man page.
$ man 7 netlink
...
Socket options
To set or get a netlink socket option, call getsockopt(2) to read
or setsockopt(2) to write the option with the option level argument
set to SOL_NETLINK. Unless otherwise noted, optval is a pointer to
an int.
Fixes: 9a4595bc7e ("[NETLINK]: Add set/getsockopt options to support more than 32 groups")
Fixes: be0c22a46c ("netlink: add NETLINK_BROADCAST_ERROR socket option")
Fixes: 38938bfe34 ("netlink: add NETLINK_NO_ENOBUFS socket flag")
Fixes: 0a6a3a23ea ("netlink: add NETLINK_CAP_ACK socket option")
Fixes: 2d4bc93368 ("netlink: extended ACK reporting")
Fixes: 89d35528d1 ("netlink: Add new socket option to enable strict checking on dumps")
Reported-by: Brad Spencer <bspencer@blackberry.com>
Link: https://lore.kernel.org/netdev/ZD7VkNWFfp22kTDt@datsun.rim.net/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Link: https://lore.kernel.org/r/20230421185255.94606-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
iter_pass_iter_ptr_to_subprog subtest is relying on actual array size
being passed as subprog parameter. This combined with recent fixes to
precision tracking in conditional jumps ([0]) is now causing verifier to
backtrack all the way to the point where sum() and fill() subprogs are
called, at which point precision backtrack bails out and forces all the
states to have precise SCALAR registers. This in turn causes each
possible value of i within fill() and sum() subprogs to cause
a different non-equivalent state, preventing iterator code to converge.
For now, change the test to assume fixed size of passed in array. Once
BPF verifier supports precision tracking across subprogram calls, these
changes will be reverted as unnecessary.
[0] 71b547f561 ("bpf: Fix incorrect verifier pruning due to missing register precision taints")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20230424235128.1941726-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Merge tag 'nf-next-23-04-22' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next
Pablo Neira Ayuso says:
====================
Netfilter/IPVS updates for net-next
1) Reduce jumpstack footprint: Stash chain in last rule marker in blob for
tracing. Remove last rule and chain from jumpstack. From Florian Westphal.
2) nf_tables validates all tables before committing the new rules.
Unfortunately, this has two drawbacks:
- Since addition of the transaction mutex pernet state gets written to
outside of the locked section from the cleanup callback, this is
wrong so do this cleanup directly after table has passed all checks.
- Revalidate tables that saw no changes. This can be avoided by
keeping the validation state per table, not per netns.
From Florian Westphal.
3) Get rid of a few redundant pointers in the traceinfo structure.
The three removed pointers are used in the expression evaluation loop,
so gcc keeps them in registers. Passing them to the (inlined) helpers
thus doesn't increase nft_do_chain text size, while stack is reduced
by another 24 bytes on 64bit arches. From Florian Westphal.
4) IPVS cleanups in several ways without implementing any functional
changes, aside from removing some debugging output:
- Update width of source for ip_vs_sync_conn_options
The operation is safe, use an annotation to describe it properly.
- Consistently use array_size() in ip_vs_conn_init()
It seems better to use helpers consistently.
- Remove {Enter,Leave}Function. These seem to be well past their
use-by date.
- Correct spelling in comments.
From Simon Horman.
5) Extended netlink error report for netdevice in flowtables and
netdev/chains. Allow for incrementally add/delete devices to netdev
basechain. Allow to create netdev chain without device.
* tag 'nf-next-23-04-22' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
netfilter: nf_tables: allow to create netdev chain without device
netfilter: nf_tables: support for deleting devices in an existing netdev chain
netfilter: nf_tables: support for adding new devices to an existing netdev chain
netfilter: nf_tables: rename function to destroy hook list
netfilter: nf_tables: do not send complete notification of deletions
netfilter: nf_tables: extended netlink error reporting for netdevice
ipvs: Correct spelling in comments
ipvs: Remove {Enter,Leave}Function
ipvs: Consistently use array_size() in ip_vs_conn_init()
ipvs: Update width of source for ip_vs_sync_conn_options
netfilter: nf_tables: do not store rule in traceinfo structure
netfilter: nf_tables: do not store verdict in traceinfo structure
netfilter: nf_tables: do not store pktinfo in traceinfo structure
netfilter: nf_tables: remove unneeded conditional
netfilter: nf_tables: make validation state per table
netfilter: nf_tables: don't write table validation state without mutex
netfilter: nf_tables: don't store chain address on jump
netfilter: nf_tables: don't store address of last rule on jump
netfilter: nf_tables: merge nft_rules_old structure and end of ruleblob marker
====================
Link: https://lore.kernel.org/r/20230421235021.216950-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
- Add sub-page block size support for uncompressed files;
- Support flattened block device for multi-blob images to be attached
into virtual machines (including cloud servers) and bare metals;
- Support long xattr name prefixes to optimize images with common
xattr namespaces (e.g. files with overlayfs xattrs) use cases;
- Various minor cleanups & fixes.
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Merge tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs updates from Gao Xiang:
"In this cycle, sub-page block support for uncompressed files is
available. It's mainly used to enable original signing ('golden')
4k-block images on arm64 with 16/64k pages. In addition, end users
could also use this feature to build a manifest to directly refer to
golden tar data.
Besides, long xattr name prefix support is also introduced in this
cycle to avoid too many xattrs with the same prefix (e.g. overlayfs
xattrs). It's useful for erofs + overlayfs combination (like Composefs
model): the image size is reduced by ~14% and runtime performance is
also slightly improved.
Others are random fixes and cleanups as usual.
Summary:
- Add sub-page block size support for uncompressed files
- Support flattened block device for multi-blob images to be attached
into virtual machines (including cloud servers) and bare metals
- Support long xattr name prefixes to optimize images with common
xattr namespaces (e.g. files with overlayfs xattrs) use cases
- Various minor cleanups & fixes"
* tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: cleanup i_format-related stuffs
erofs: sunset erofs_dbg()
erofs: fix potential overflow calculating xattr_isize
erofs: get rid of z_erofs_fill_inode()
erofs: enable long extended attribute name prefixes
erofs: handle long xattr name prefixes properly
erofs: add helpers to load long xattr name prefixes
erofs: introduce on-disk format for long xattr name prefixes
erofs: move packed inode out of the compression part
erofs: keep meta inode into erofs_buf
erofs: initialize packed inode after root inode is assigned
erofs: stop parsing non-compact HEAD index if clusterofs is invalid
erofs: don't warn ztailpacking feature anymore
erofs: simplify erofs_xattr_generic_get()
erofs: rename init_inode_xattrs with erofs_ prefix
erofs: move several xattr helpers into xattr.c
erofs: tidy up EROFS on-disk naming
erofs: support flattened block device for multi-blob images
erofs: set block size to the on-disk block size
erofs: avoid hardcoded blocksize for subpage block support
The tracing recursion prevention mechanism must be protected by rcu, that
leaves __rcu_read_{lock,unlock} unprotected by this mechanism. If we trace
them, the recursion will happen. Let's add them into the btf id deny list.
When CONFIG_PREEMPT_RCU is enabled, it can be reproduced with a simple bpf
program as such:
SEC("fentry/__rcu_read_lock")
int fentry_run()
{
return 0;
}
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230424161104.3737-2-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Merge tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs open fixlet from Christian Brauner:
"EINVAL ist keinmal: This contains the changes to make O_DIRECTORY when
specified together with O_CREAT an invalid request.
The wider background is that a regression report about the behavior of
O_DIRECTORY | O_CREAT was sent to fsdevel about a behavior that was
changed multiple years and LTS releases earlier during v5.7
development.
This has also been covered in
https://lwn.net/Articles/926782/
which provides an excellent summary of the discussion"
* tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
open: return EINVAL for O_DIRECTORY | O_CREAT
As reported by Kumar in [0], the shared ownership implementation for BPF
programs has some race conditions which need to be addressed before it
can safely be used. This patch does so in a minimal way instead of
ripping out shared ownership entirely, as proper fixes for the issues
raised will follow ASAP, at which point this patch's commit can be
reverted to re-enable shared ownership.
The patch removes the ability to call bpf_refcount_acquire_impl from BPF
programs. Programs can only bump refcount and obtain a new owning
reference using this kfunc, so removing the ability to call it
effectively disables shared ownership.
Instead of changing success / failure expectations for
bpf_refcount-related selftests, this patch just disables them from
running for now.
[0]: https://lore.kernel.org/bpf/d7hyspcow5wtjcmw4fugdgyp3fwhljwuscp3xyut5qnwivyeru@ysdq543otzv2/
Reported-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Link: https://lore.kernel.org/r/20230424204321.2680232-1-davemarchevsky@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Merge tag 'v6.4/vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull misc vfs updates from Christian Brauner:
"This contains a pile of various smaller fixes. Most of them aren't
very interesting so this just highlights things worth mentioning:
- Various filesystems contained the same little helper to convert
from the mode of a dentry to the DT_* type of that dentry.
They have now all been switched to rely on the generic
fs_umode_to_dtype() helper. All custom helpers are removed (Jeff)
- Fsnotify now reports ACCESS and MODIFY events for splice
(Chung-Chiang Cheng)
- After converting timerfd a long time ago to rely on
wait_event_interruptible_*() apis, convert eventfd as well. This
removes the complex open-coded wait code (Wen Yang)
- Simplify sysctl registration for devpts, avoiding the declaration
of two tables. Instead, just use a prefixed path with
register_sysctl() (Luis)
- The setattr_should_drop_sgid() helper is now exported so NFS can
use it. By switching NFS to this helper an NFS setgid inheritance
bug is fixed (me)"
* tag 'v6.4/vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode()
pnode: pass mountpoint directly
eventfd: use wait_event_interruptible_locked_irq() helper
splice: report related fsnotify events
fs: consolidate duplicate dt_type helpers
nfs: use vfs setgid helper
Update relatime comments to include equality
fs/buffer: Remove redundant assignment to err
fs_context: drop the unused lsm_flags member
fs/namespace: fnic: Switch to use %ptTd
Documentation: update idmappings.rst
devpts: simplify two-level sysctl registration for pty_kern_table
eventpoll: align comment with nested epoll limitation
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Merge tag 'v6.4/vfs.acl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull acl updates from Christian Brauner:
"After finishing the introduction of the new posix acl api last cycle
the generic POSIX ACL xattr handlers are still around in the
filesystems xattr handlers for two reasons:
(1) Because a few filesystems rely on the ->list() method of the
generic POSIX ACL xattr handlers in their ->listxattr() inode
operation.
(2) POSIX ACLs are only available if IOP_XATTR is raised. The
IOP_XATTR flag is raised in inode_init_always() based on whether
the sb->s_xattr pointer is non-NULL. IOW, the registered xattr
handlers of the filesystem are used to raise IOP_XATTR. Removing
the generic POSIX ACL xattr handlers from all filesystems would
risk regressing filesystems that only implement POSIX ACL support
and no other xattrs (nfs3 comes to mind).
This contains the work to decouple POSIX ACLs from the IOP_XATTR flag
as they don't depend on xattr handlers anymore. So it's now possible
to remove the generic POSIX ACL xattr handlers from the sb->s_xattr
list of all filesystems. This is a crucial step as the generic POSIX
ACL xattr handlers aren't used for POSIX ACLs anymore and POSIX ACLs
don't depend on the xattr infrastructure anymore.
Adressing problem (1) will require more long-term work. It would be
best to get rid of the ->list() method of xattr handlers completely at
some point.
For erofs, ext{2,4}, f2fs, jffs2, ocfs2, and reiserfs the nop POSIX
ACL xattr handler is kept around so they can continue to use
array-based xattr handler indexing.
This update does simplify the ->listxattr() implementation of all
these filesystems however"
* tag 'v6.4/vfs.acl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
acl: don't depend on IOP_XATTR
ovl: check for ->listxattr() support
reiserfs: rework priv inode handling
fs: rename generic posix acl handlers
reiserfs: rework ->listxattr() implementation
fs: simplify ->listxattr() implementation
fs: drop unused posix acl handlers
xattr: remove unused argument
xattr: add listxattr helper
xattr: simplify listxattr helpers
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Merge tag 'v6.4/pidfd.file' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull pidfd updates from Christian Brauner:
"This adds a new pidfd_prepare() helper which allows the caller to
reserve a pidfd number and allocates a new pidfd file that stashes the
provided struct pid.
It should be avoided installing a file descriptor into a task's file
descriptor table just to close it again via close_fd() in case an
error occurs. The fd has been visible to userspace and might already
be in use. Instead, a file descriptor should be reserved but not
installed into the caller's file descriptor table.
If another failure path is hit then the reserved file descriptor and
file can just be put without any userspace visible side-effects. And
if all failure paths are cleared the file descriptor and file can be
installed into the task's file descriptor table.
This helper is now used in all places that open coded this
functionality before. For example, this is currently done during
copy_process() and fanotify used pidfd_create(), which returns a pidfd
that has already been made visibile in the caller's file descriptor
table, but then closed it using close_fd().
In one of the next merge windows there is also new functionality
coming to unix domain sockets that will have to rely on
pidfd_prepare()"
* tag 'v6.4/pidfd.file' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
fanotify: use pidfd_prepare()
fork: use pidfd_prepare()
pid: add pidfd_prepare()
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Merge tag 'v6.4/kernel.user_worker' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull user work thread updates from Christian Brauner:
"This contains the work generalizing the ability to create a kernel
worker from a userspace process.
Such user workers will run with the same credentials as the userspace
process they were created from providing stronger security and
accounting guarantees than the traditional override_creds() approach
ever could've hoped for.
The original work was heavily based and optimzed for the needs of
io_uring which was the first user. However, as it quickly turned out
the ability to create user workers inherting properties from a
userspace process is generally useful.
The vhost subsystem currently creates workers using the kthread api.
The consequences of using the kthread api are that RLIMITs don't work
correctly as they are inherited from khtreadd. This leads to bugs
where more workers are created than would be allowed by the RLIMITs of
the userspace process in lieu of which workers are created.
Problems like this disappear with user workers created from the
userspace processes for which they perform the work. In addition,
providing this api allows vhost to remove additional complexity. For
example, cgroup and mm sharing will just work out of the box with user
workers based on the relevant userspace process instead of manually
ensuring the correct cgroup and mm contexts are used.
So the vhost subsystem should simply be made to use the same mechanism
as io_uring. To this end the original mechanism used for
create_io_thread() is generalized into user workers:
- Introduce PF_USER_WORKER as a generic indicator that a given task
is a user worker, i.e., a kernel task that was created from a
userspace process. Now a PF_IO_WORKER thread is just a specialized
version of PF_USER_WORKER. So io_uring io workers raise both flags.
- Make copy_process() available to core kernel code
- Extend struct kernel_clone_args with the following bitfields
allowing to indicate to copy_process():
- to create a user worker (raise PF_USER_WORKER)
- to not inherit any files from the userspace process
- to ignore signals
After all generic changes are in place the vhost subsystem implements
a new dedicated vhost api based on user workers. Finally, vhost is
switched to rely on the new api moving it off of kthreads.
Thanks to Mike for sticking it out and making it through this rather
arduous journey"
* tag 'v6.4/kernel.user_worker' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
vhost: use vhost_tasks for worker threads
vhost: move worker thread fields to new struct
vhost_task: Allow vhost layer to use copy_process
fork: allow kernel code to call copy_process
fork: Add kernel_clone_args flag to ignore signals
fork: add kernel_clone_args flag to not dup/clone files
fork/vm: Move common PF_IO_WORKER behavior to new flag
kernel: Make io_thread and kthread bit fields
kthread: Pass in the thread's name during creation
kernel: Allow a kernel thread's name to be set in copy_process
csky: Remove kernel_thread declaration
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Merge tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull clone3 selftest fix from Christian Brauner:
"This is a single fix to the clone3() selftstests.
It fell through the sefltest tree cracks a few times so I'll provide
it here. It has low urgency but we should still correctly report the
number of tests"
* tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
selftests/clone3: fix number of tests in ksft_set_plan
still a fair amount going on, including:
- Reorganizing the architecture-specific documentation under
Documentation/arch. This makes the structure match the source directory
and helps to clean up the mess that is the top-level Documentation
directory a bit. This work creates the new directory and moves x86 and
most of the less-active architectures there. The current plan is to move
the rest of the architectures in 6.5, with the patches going through the
appropriate subsystem trees.
- Some more Spanish translations and maintenance of the Italian
translation.
- A new "Kernel contribution maturity model" document from Ted.
- A new tutorial on quickly building a trimmed kernel from Thorsten.
Plus the usual set of updates and fixes.
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Merge tag 'docs-6.4' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"Commit volume in documentation is relatively low this time, but there
is still a fair amount going on, including:
- Reorganize the architecture-specific documentation under
Documentation/arch
This makes the structure match the source directory and helps to
clean up the mess that is the top-level Documentation directory a
bit. This work creates the new directory and moves x86 and most of
the less-active architectures there.
The current plan is to move the rest of the architectures in 6.5,
with the patches going through the appropriate subsystem trees.
- Some more Spanish translations and maintenance of the Italian
translation
- A new "Kernel contribution maturity model" document from Ted
- A new tutorial on quickly building a trimmed kernel from Thorsten
Plus the usual set of updates and fixes"
* tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits)
media: Adjust column width for pdfdocs
media: Fix building pdfdocs
docs: clk: add documentation to log which clocks have been disabled
docs: trace: Fix typo in ftrace.rst
Documentation/process: always CC responsible lists
docs: kmemleak: adjust to config renaming
ELF: document some de-facto PT_* ABI quirks
Documentation: arm: remove stih415/stih416 related entries
docs: turn off "smart quotes" in the HTML build
Documentation: firmware: Clarify firmware path usage
docs/mm: Physical Memory: Fix grammar
Documentation: Add document for false sharing
dma-api-howto: typo fix
docs: move m68k architecture documentation under Documentation/arch/
docs: move parisc documentation under Documentation/arch/
docs: move ia64 architecture docs under Documentation/arch/
docs: Move arc architecture docs under Documentation/arch/
docs: move nios2 documentation under Documentation/arch/
docs: move openrisc documentation under Documentation/arch/
docs: move superh documentation under Documentation/arch/
...
This KUnit update Linux 6.4-rc1 consists of:
- several fixes to kunit tool
- new klist structure test
- support for m68k under QEMU
- support for overriding the QEMU serial port
- support for SH under QEMU
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Merge tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
- several fixes to kunit tool
- new klist structure test
- support for m68k under QEMU
- support for overriding the QEMU serial port
- support for SH under QEMU
* tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: add tests for using current KUnit test field
kunit: tool: Add support for SH under QEMU
kunit: tool: Add support for overriding the QEMU serial port
.gitignore: Unignore .kunitconfig
list: test: Test the klist structure
kunit: increase KUNIT_LOG_SIZE to 2048 bytes
kunit: Use gfp in kunit_alloc_resource() kernel-doc
kunit: tool: fix pre-existing `mypy --strict` errors and update run_checks.py
kunit: tool: remove unused imports and variables
kunit: tool: add subscripts for type annotations where appropriate
kunit: fix bug of extra newline characters in debugfs logs
kunit: fix bug in the order of lines in debugfs logs
kunit: fix bug in debugfs logs of parameterized tests
kunit: tool: Add support for m68k under QEMU
linux-kselftest-next-6.4-rc1
This Kselftest update for Linux 6.4-rc1 consists of:
- several patches to enhance and fix resctrl test
- nolibc support for kselftest with an addition to vprintf() to
tools/nolibc/stdio and related test changes
- Refactor 'peeksiginfo' ptrace test part
- add 'malloc' failures checks in cgroup test_memcontrol
- a new prctl test
- enhancements sched test with additional ore schedule prctl calls
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Merge tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest updates from Shuah Khan:
- several patches to enhance and fix resctrl test
- nolibc support for kselftest with an addition to vprintf() to
tools/nolibc/stdio and related test changes
- Refactor 'peeksiginfo' ptrace test part
- add 'malloc' failures checks in cgroup test_memcontrol
- a new prctl test
- enhancements sched test with additional ore schedule prctl calls
* tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits)
selftests/resctrl: Fix incorrect error return on test complete
selftests/resctrl: Remove duplicate codes that clear each test result file
selftests/resctrl: Commonize the signal handler register/unregister for all tests
selftests/resctrl: Cleanup properly when an error occurs in CAT test
selftests/resctrl: Flush stdout file buffer before executing fork()
selftests/resctrl: Return MBA check result and make it to output message
selftests/resctrl: Fix set up schemata with 100% allocation on first run in MBM test
selftests/resctrl: Use correct exit code when tests fail
kselftest/arm64: Convert za-fork to use kselftest.h
kselftest: Support nolibc
tools/nolibc/stdio: Implement vprintf()
selftests/resctrl: Correct get_llc_perf() param in function comment
selftests/resctrl: Use remount_resctrlfs() consistently with boolean
selftests/resctrl: Change name from CBM_MASK_PATH to INFO_PATH
selftests/resctrl: Change initialize_llc_perf() return type to void
selftests/resctrl: Replace obsolete memalign() with posix_memalign()
selftests/resctrl: Check for return value after write_schemata()
selftests/resctrl: Allow ->setup() to return errors
selftests/resctrl: Move ->setup() call outside of test specific branches
selftests/resctrl: Return NULL if malloc_and_init_memory() did not alloc mem
...
o MAINTAINERS files additions and changes.
o Fix hotplug warning in nohz code.
o Tick dependency changes by Zqiang.
o Lazy-RCU shrinker fixes by Zqiang.
o rcu-tasks stall reporting improvements by Neeraj.
o Initial changes for renaming of k[v]free_rcu() to its new k[v]free_rcu_mightsleep()
name for robustness.
o Documentation Updates:
o Significant changes to srcu_struct size.
o Deadlock detection for srcu_read_lock() vs synchronize_srcu() from Boqun.
o rcutorture and rcu-related tool, which are targeted for v6.4 from Boqun's tree.
o Other misc changes.
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Merge tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux
Pull RCU updates from Joel Fernandes:
- Updates and additions to MAINTAINERS files, with Boqun being added to
the RCU entry and Zqiang being added as an RCU reviewer.
I have also transitioned from reviewer to maintainer; however, Paul
will be taking over sending RCU pull-requests for the next merge
window.
- Resolution of hotplug warning in nohz code, achieved by fixing
cpu_is_hotpluggable() through interaction with the nohz subsystem.
Tick dependency modifications by Zqiang, focusing on fixing usage of
the TICK_DEP_BIT_RCU_EXP bitmask.
- Avoid needless calls to the rcu-lazy shrinker for CONFIG_RCU_LAZY=n
kernels, fixed by Zqiang.
- Improvements to rcu-tasks stall reporting by Neeraj.
- Initial renaming of k[v]free_rcu() to k[v]free_rcu_mightsleep() for
increased robustness, affecting several components like mac802154,
drbd, vmw_vmci, tracing, and more.
A report by Eric Dumazet showed that the API could be unknowingly
used in an atomic context, so we'd rather make sure they know what
they're asking for by being explicit:
https://lore.kernel.org/all/20221202052847.2623997-1-edumazet@google.com/
- Documentation updates, including corrections to spelling,
clarifications in comments, and improvements to the srcu_size_state
comments.
- Better srcu_struct cache locality for readers, by adjusting the size
of srcu_struct in support of SRCU usage by Christoph Hellwig.
- Teach lockdep to detect deadlocks between srcu_read_lock() vs
synchronize_srcu() contributed by Boqun.
Previously lockdep could not detect such deadlocks, now it can.
- Integration of rcutorture and rcu-related tools, targeted for v6.4
from Boqun's tree, featuring new SRCU deadlock scenarios, test_nmis
module parameter, and more
- Miscellaneous changes, various code cleanups and comment improvements
* tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux: (71 commits)
checkpatch: Error out if deprecated RCU API used
mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()
rcuscale: Rename kfree_rcu() to kfree_rcu_mightsleep()
ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()
net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
lib/test_vmalloc.c: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
tracing: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
misc: vmw_vmci: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
rcu-tasks: Report stalls during synchronize_srcu() in rcu_tasks_postscan()
rcu: Permit start_poll_synchronize_rcu_expedited() to be invoked early
rcu: Remove never-set needwake assignment from rcu_report_qs_rdp()
rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels
rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
rcu: Fix set/clear TICK_DEP_BIT_RCU_EXP bitmask race
rcu/trace: use strscpy() to instead of strncpy()
tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
...
o Add support for loongarch.
o Fix stack-protector issues.
o Support additional integral types and signal-related macros.
o Add support for stdin, stdout, and stderr.
o Add getuid() and geteuid().
o Allow S_I* macros to be overridden by program.
o Defer to linux/fcntl.h and linux/stat.h to avoid duplicate
definitions.
o Many improvements to the self tests.
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Merge tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull nolibc updates from Paul McKenney:
- Add support for loongarch
- Fix stack-protector issues
- Support additional integral types and signal-related macros
- Add support for stdin, stdout, and stderr
- Add getuid() and geteuid()
- Allow S_I* macros to be overridden by program
- Defer to linux/fcntl.h and linux/stat.h to avoid duplicate
definitions
- Many improvements to the selftests
* tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (22 commits)
tools/nolibc: x86_64: add stackprotector support
tools/nolibc: i386: add stackprotector support
tools/nolibc: tests: add test for -fstack-protector
tools/nolibc: tests: fold in no-stack-protector cflags
tools/nolibc: add support for stack protector
tools/nolibc: tests: constify test_names
tools/nolibc: add helpers for wait() signal exits
tools/nolibc: add definitions for standard fds
selftests/nolibc: Adjust indentation for Makefile
selftests/nolibc: Add support for LoongArch
tools/nolibc: Add support for LoongArch
tools/nolibc: Add statx() and make stat() rely on statx() if necessary
tools/nolibc: Include linux/fcntl.h and remove duplicate code
tools/nolibc: check for S_I* macros before defining them
selftests/nolibc: skip the chroot_root and link_dir tests when not privileged
tools/nolibc: add getuid() and geteuid()
tools/nolibc: add tests for the integer limits in stdint.h
tools/nolibc: enlarge column width of tests
tools/nolibc: add integer types and integer limit macros
tools/nolibc: add stdint.h
...
This update adds tests for nested locking and also adds support for
testing raw spinlocks in PREEMPT_RT kernels.
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Merge tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull locktorture updates from Paul McKenney:
"This adds tests for nested locking and also adds support for testing
raw spinlocks in PREEMPT_RT kernels"
* tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
locktorture: Add raw_spinlock* torture tests for PREEMPT_RT kernels
locktorture: With nested locks, occasionally skip main lock
locktorture: Add nested locking to rtmutex torture tests
locktorture: Add nested locking to mutex torture tests
locktorture: Add nested_[un]lock() hooks and nlocks parameter
This update improves litmus-test documentation and improves the ability
to do before/after tests on the https://github.com/paulmckrcu/litmus repo.
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Merge tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull Linux Kernel Memory Model scripting updates from Paul McKenney:
"This improves litmus-test documentation and improves the ability to do
before/after tests on the https://github.com/paulmckrcu/litmus repo"
* tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (32 commits)
tools/memory-model: Remove out-of-date SRCU documentation
tools/memory-model: Document LKMM test procedure
tools/memory-model: Use "grep -E" instead of "egrep"
tools/memory-model: Use "-unroll 0" to keep --hw runs finite
tools/memory-model: Make judgelitmus.sh handle scripted Result: tag
tools/memory-model: Add data-race capabilities to judgelitmus.sh
tools/memory-model: Add checktheselitmus.sh to run specified litmus tests
tools/memory-model: Repair parseargs.sh header comment
tools/memory-model: Add "--" to parseargs.sh for additional arguments
tools/memory-model: Make history-check scripts use mselect7
tools/memory-model: Make checkghlitmus.sh use mselect7
tools/memory-model: Fix scripting --jobs argument
tools/memory-model: Implement --hw support for checkghlitmus.sh
tools/memory-model: Add -v flag to jingle7 runs
tools/memory-model: Make runlitmus.sh check for jingle errors
tools/memory-model: Allow herd to deduce CPU type
tools/memory-model: Keep assembly-language litmus tests
tools/memory-model: Move from .AArch64.litmus.out to .litmus.AArch.out
tools/memory-model: Make runlitmus.sh generate .litmus.out for --hw
tools/memory-model: Split runlitmus.sh out of checklitmus.sh
...
This update improves LKMM diagnostic messages, unifies handling
of the ordering produced by unlock/lock pairs, adds support for the
smp_mb__after_srcu_read_unlock() macro, removes redundant members from
the to-r relation, brings SRCU read-side semantics into alignment
with Linux-kernel SRCU, makes ppo a subrelation of po, and improves
documentation.
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Merge tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull Linux Kernel Memory Model updates from Paul McKenney
"This improves LKMM diagnostic messages, unifies handling of the
ordering produced by unlock/lock pairs, adds support for the
smp_mb__after_srcu_read_unlock() macro, removes redundant members from
the to-r relation, brings SRCU read-side semantics into alignment with
Linux-kernel SRCU, makes ppo a subrelation of po, and improves
documentation"
* tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
Documentation: litmus-tests: Correct spelling
tools/memory-model: Add documentation about SRCU read-side critical sections
tools/memory-model: Make ppo a subrelation of po
tools/memory-model: Provide exact SRCU semantics
tools/memory-model: Restrict to-r to read-read address dependency
tools/memory-model: Add smp_mb__after_srcu_read_unlock()
tools/memory-model: Unify UNLOCK+LOCK pairings to po-unlock-lock-po
tools/memory-model: Update some warning labels
This update fixes kernel-doc warnings and also updates instrumentation
from READ_ONCE() to volatile in order to avoid unaligned load-acquire
instructions on arm64 in kernels built with LTO.
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Merge tag 'kcsan.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull KCSAN updates from Paul McKenney:
"Kernel concurrency sanitizer (KCSAN) updates for v6.4
This fixes kernel-doc warnings and also updates instrumentation from
READ_ONCE() to volatile in order to avoid unaligned load-acquire
instructions on arm64 in kernels built with LTO"
* tag 'kcsan.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
kcsan: Avoid READ_ONCE() in read_instrumented_memory()
instrumented.h: Fix all kernel-doc format warnings
the landed patch sets are below.
The .machine keyring, used for Machine Owner Keys (MOK), acquired the
ability to store only CA enforced keys, and put rest to the .platform
keyring, thus separating the code signing keys from the keys that are
used to sign certificates. This essentially unlocks the use of the
.machine keyring as a trust anchor for IMA. It is an opt-in feature,
meaning that the additional contraints won't brick anyone who does not
care about them.
The 2nd feature is the enablement of interrupt based transactions with
discrete TPM chips (tpm_tis). There was code for this existing but it
never really worked so I consider this a new feature rather than a bug
fix. Before the driver just falled back to the polling mode.
Link: https://lore.kernel.org/linux-integrity/a93b6222-edda-d43c-f010-a59701f2aeef@gmx.de/
Link: https://lore.kernel.org/linux-integrity/20230302164652.83571-1-eric.snowberg@oracle.com/
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Merge tag 'tpmdd-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen:
- The .machine keyring, used for Machine Owner Keys (MOK), acquired the
ability to store only CA enforced keys, and put rest to the .platform
keyring, thus separating the code signing keys from the keys that are
used to sign certificates.
This essentially unlocks the use of the .machine keyring as a trust
anchor for IMA. It is an opt-in feature, meaning that the additional
contraints won't brick anyone who does not care about them.
- Enable interrupt based transactions with discrete TPM chips (tpm_tis).
There was code for this existing but it never really worked so I
consider this a new feature rather than a bug fix. Before the driver
just fell back to the polling mode.
Link: https://lore.kernel.org/linux-integrity/a93b6222-edda-d43c-f010-a59701f2aeef@gmx.de/
Link: https://lore.kernel.org/linux-integrity/20230302164652.83571-1-eric.snowberg@oracle.com/
* tag 'tpmdd-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: (29 commits)
tpm: Add !tpm_amd_is_rng_defective() to the hwrng_unregister() call site
tpm_tis: fix stall after iowrite*()s
tpm/tpm_tis_synquacer: Convert to platform remove callback returning void
tpm/tpm_tis: Convert to platform remove callback returning void
tpm/tpm_ftpm_tee: Convert to platform remove callback returning void
tpm: tpm_tis_spi: Mark ACPI and OF related data as maybe unused
tpm: st33zp24: Mark ACPI and OF related data as maybe unused
tpm, tpm_tis: Enable interrupt test
tpm, tpm_tis: startup chip before testing for interrupts
tpm, tpm_tis: Claim locality when interrupts are reenabled on resume
tpm, tpm_tis: Claim locality in interrupt handler
tpm, tpm_tis: Request threaded interrupt handler
tpm, tpm: Implement usage counter for locality
tpm, tpm_tis: do not check for the active locality in interrupt handler
tpm, tpm_tis: Move interrupt mask checks into own function
tpm, tpm_tis: Only handle supported interrupts
tpm, tpm_tis: Claim locality before writing interrupt registers
tpm, tpm_tis: Do not skip reset of original interrupt vector
tpm, tpm_tis: Disable interrupts if tpm_tis_probe_irq() failed
tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register
...
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Merge tag 'Smack-for-6.4' of https://github.com/cschaufler/smack-next
Pull smack updates from Casey Schaufler:
"There are two changes, one small and one more substantial:
- Remove of an unnecessary cast
- The mount option processing introduced with the mount rework makes
copies of mount option values. There is no good reason to make
copies of Smack labels, as they are maintained on a list and never
removed.
The code now uses pointers to entries on the list, reducing
processing time and memory use"
* tag 'Smack-for-6.4' of https://github.com/cschaufler/smack-next:
Smack: Improve mount process memory use
smack_lsm: remove unnecessary type casting
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Merge tag 'landlock-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux
Pull landlock update from Mickaël Salaün:
"Improve user space documentation"
* tag 'landlock-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
landlock: Clarify documentation for the LANDLOCK_ACCESS_FS_REFER right
