If the same page and data is being used for multiple requests,
then ignore that when the request indicates we're reading from the start
of the page.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Highlights include:
Bugfixes
- Fix a race in the RPCSEC_GSS upcall code that causes hung RPC calls
- Fix a broken coalescing test in the pNFS file layout driver
- Ensure that the access cache rcu path also applies the login test
- Fix up for a sparse warning
-----BEGIN PGP SIGNATURE-----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=N6cT
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-6.2-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client fixes from Trond Myklebust:
- Fix a race in the RPCSEC_GSS upcall code that causes hung RPC calls
- Fix a broken coalescing test in the pNFS file layout driver
- Ensure that the access cache rcu path also applies the login test
- Fix up for a sparse warning
* tag 'nfs-for-6.2-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS: Fix up a sparse warning
NFS: Judge the file access cache's timestamp in rcu path
pNFS/filelayout: Fix coalescing test for single DS
SUNRPC: ensure the matching upcall is in-flight upon downcall
If the user's login time is newer than the cache's timestamp,
we expect the cache may be stale and need to clear.
The stale cache will remain in the list's tail if no other
users operate on that inode.
Once the user accesses the inode, the stale cache will be
returned in rcu path.
Signed-off-by: Chengen Du <chengen.du@canonical.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When there is a single DS no striping constraints need to be placed on
the IO. When such constraint is applied then buffered reads don't
coalesce to the DS's rsize.
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Here is the set of driver core and kernfs changes for 6.2-rc1.
The "big" change in here is the addition of a new macro,
container_of_const() that will preserve the "const-ness" of a pointer
passed into it.
The "problem" of the current container_of() macro is that if you pass in
a "const *", out of it can comes a non-const pointer unless you
specifically ask for it. For many usages, we want to preserve the
"const" attribute by using the same call. For a specific example, this
series changes the kobj_to_dev() macro to use it, allowing it to be used
no matter what the const value is. This prevents every subsystem from
having to declare 2 different individual macros (i.e.
kobj_const_to_dev() and kobj_to_dev()) and having the compiler enforce
the const value at build time, which having 2 macros would not do
either.
The driver for all of this have been discussions with the Rust kernel
developers as to how to properly mark driver core, and kobject, objects
as being "non-mutable". The changes to the kobject and driver core in
this pull request are the result of that, as there are lots of paths
where kobjects and device pointers are not modified at all, so marking
them as "const" allows the compiler to enforce this.
So, a nice side affect of the Rust development effort has been already
to clean up the driver core code to be more obvious about object rules.
All of this has been bike-shedded in quite a lot of detail on lkml with
different names and implementations resulting in the tiny version we
have in here, much better than my original proposal. Lots of subsystem
maintainers have acked the changes as well.
Other than this change, included in here are smaller stuff like:
- kernfs fixes and updates to handle lock contention better
- vmlinux.lds.h fixes and updates
- sysfs and debugfs documentation updates
- device property updates
All of these have been in the linux-next tree for quite a while with no
problems, OTHER than some merge issues with other trees that should be
obvious when you hit them (block tree deletes a driver that this tree
modifies, iommufd tree modifies code that this tree also touches). If
there are merge problems with these trees, please let me know.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCY5wz3A8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yks0ACeKYUlVgCsER8eYW+x18szFa2QTXgAn2h/VhZe
1Fp53boFaQkGBjl8mGF8
=v+FB
-----END PGP SIGNATURE-----
Merge tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the set of driver core and kernfs changes for 6.2-rc1.
The "big" change in here is the addition of a new macro,
container_of_const() that will preserve the "const-ness" of a pointer
passed into it.
The "problem" of the current container_of() macro is that if you pass
in a "const *", out of it can comes a non-const pointer unless you
specifically ask for it. For many usages, we want to preserve the
"const" attribute by using the same call. For a specific example, this
series changes the kobj_to_dev() macro to use it, allowing it to be
used no matter what the const value is. This prevents every subsystem
from having to declare 2 different individual macros (i.e.
kobj_const_to_dev() and kobj_to_dev()) and having the compiler enforce
the const value at build time, which having 2 macros would not do
either.
The driver for all of this have been discussions with the Rust kernel
developers as to how to properly mark driver core, and kobject,
objects as being "non-mutable". The changes to the kobject and driver
core in this pull request are the result of that, as there are lots of
paths where kobjects and device pointers are not modified at all, so
marking them as "const" allows the compiler to enforce this.
So, a nice side affect of the Rust development effort has been already
to clean up the driver core code to be more obvious about object
rules.
All of this has been bike-shedded in quite a lot of detail on lkml
with different names and implementations resulting in the tiny version
we have in here, much better than my original proposal. Lots of
subsystem maintainers have acked the changes as well.
Other than this change, included in here are smaller stuff like:
- kernfs fixes and updates to handle lock contention better
- vmlinux.lds.h fixes and updates
- sysfs and debugfs documentation updates
- device property updates
All of these have been in the linux-next tree for quite a while with
no problems"
* tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (58 commits)
device property: Fix documentation for fwnode_get_next_parent()
firmware_loader: fix up to_fw_sysfs() to preserve const
usb.h: take advantage of container_of_const()
device.h: move kobj_to_dev() to use container_of_const()
container_of: add container_of_const() that preserves const-ness of the pointer
driver core: fix up missed drivers/s390/char/hmcdrv_dev.c class.devnode() conversion.
driver core: fix up missed scsi/cxlflash class.devnode() conversion.
driver core: fix up some missing class.devnode() conversions.
driver core: make struct class.devnode() take a const *
driver core: make struct class.dev_uevent() take a const *
cacheinfo: Remove of_node_put() for fw_token
device property: Add a blank line in Kconfig of tests
device property: Rename goto label to be more precise
device property: Move PROPERTY_ENTRY_BOOL() a bit down
device property: Get rid of __PROPERTY_ENTRY_ARRAY_EL*SIZE*()
kernfs: fix all kernel-doc warnings and multiple typos
driver core: pass a const * into of_device_uevent()
kobject: kset_uevent_ops: make name() callback take a const *
kobject: kset_uevent_ops: make filter() callback take a const *
kobject: make kobject_namespace take a const *
...
- Convert flexible array members, fix -Wstringop-overflow warnings,
and fix KCFI function type mismatches that went ignored by
maintainers (Gustavo A. R. Silva, Nathan Chancellor, Kees Cook).
- Remove the remaining side-effect users of ksize() by converting
dma-buf, btrfs, and coredump to using kmalloc_size_roundup(),
add more __alloc_size attributes, and introduce full testing
of all allocator functions. Finally remove the ksize() side-effect
so that each allocation-aware checker can finally behave without
exceptions.
- Introduce oops_limit (default 10,000) and warn_limit (default off)
to provide greater granularity of control for panic_on_oops and
panic_on_warn (Jann Horn, Kees Cook).
- Introduce overflows_type() and castable_to_type() helpers for
cleaner overflow checking.
- Improve code generation for strscpy() and update str*() kern-doc.
- Convert strscpy and sigphash tests to KUnit, and expand memcpy
tests.
- Always use a non-NULL argument for prepare_kernel_cred().
- Disable structleak plugin in FORTIFY KUnit test (Anders Roxell).
- Adjust orphan linker section checking to respect CONFIG_WERROR
(Xin Li).
- Make sure siginfo is cleared for forced SIGKILL (haifeng.xu).
- Fix um vs FORTIFY warnings for always-NULL arguments.
-----BEGIN PGP SIGNATURE-----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=yaaN
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kernel hardening updates from Kees Cook:
- Convert flexible array members, fix -Wstringop-overflow warnings, and
fix KCFI function type mismatches that went ignored by maintainers
(Gustavo A. R. Silva, Nathan Chancellor, Kees Cook)
- Remove the remaining side-effect users of ksize() by converting
dma-buf, btrfs, and coredump to using kmalloc_size_roundup(), add
more __alloc_size attributes, and introduce full testing of all
allocator functions. Finally remove the ksize() side-effect so that
each allocation-aware checker can finally behave without exceptions
- Introduce oops_limit (default 10,000) and warn_limit (default off) to
provide greater granularity of control for panic_on_oops and
panic_on_warn (Jann Horn, Kees Cook)
- Introduce overflows_type() and castable_to_type() helpers for cleaner
overflow checking
- Improve code generation for strscpy() and update str*() kern-doc
- Convert strscpy and sigphash tests to KUnit, and expand memcpy tests
- Always use a non-NULL argument for prepare_kernel_cred()
- Disable structleak plugin in FORTIFY KUnit test (Anders Roxell)
- Adjust orphan linker section checking to respect CONFIG_WERROR (Xin
Li)
- Make sure siginfo is cleared for forced SIGKILL (haifeng.xu)
- Fix um vs FORTIFY warnings for always-NULL arguments
* tag 'hardening-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (31 commits)
ksmbd: replace one-element arrays with flexible-array members
hpet: Replace one-element array with flexible-array member
um: virt-pci: Avoid GCC non-NULL warning
signal: Initialize the info in ksignal
lib: fortify_kunit: build without structleak plugin
panic: Expose "warn_count" to sysfs
panic: Introduce warn_limit
panic: Consolidate open-coded panic_on_warn checks
exit: Allow oops_limit to be disabled
exit: Expose "oops_count" to sysfs
exit: Put an upper limit on how often we can oops
panic: Separate sysctl logic from CONFIG_SMP
mm/pgtable: Fix multiple -Wstringop-overflow warnings
mm: Make ksize() a reporting-only function
kunit/fortify: Validate __alloc_size attribute results
drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid()
drm/fsl-dcu: Fix return type of fsl_dcu_drm_connector_mode_valid()
driver core: Add __alloc_size hint to devm allocators
overflow: Introduce overflows_type() and castable_to_type()
coredump: Proactively round up to kmalloc bucket size
...
Highlights include:
Bugfixes
- Fix a NULL pointer dereference in the mount parser
- Fix a memory stomp in decode_attr_security_label
- Fix a credential leak in _nfs4_discover_trunking()
- Fix a buffer leak in rpcrdma_req_create()
- Fix a leaked socket in rpc_sockname()
- Fix a deadlock between nfs4_open_recover_helper() and delegreturn
- Fix an Oops in nfs_d_automount()
- Fix a potential race in nfs_call_unlink()
- Multiple fixes for the open context mode
- NFSv4.2 READ_PLUS fixes
- Fix a regression in which small rsize/wsize values are being forbidden
- Fail client initialisation if the NFSv4.x state manager thread can't run
- avoid spurious warning of lost lock that is being unlocked.
- Ensure the initialisation of struct nfs4_label
Features and cleanups
- Trigger the "ls -l" readdir heuristic sooner
- Clear the file access cache upon login to ensure supplementary group
info is in sync between the client and server
- pnfs: Fix up the logging of layout stateids
- NFSv4.2: Change the default KConfig value for READ_PLUS
- Use sysfs_emit() instead of scnprintf() where appropriate
-----BEGIN PGP SIGNATURE-----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=Mz1l
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-6.2-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust
"Bugfixes:
- Fix NULL pointer dereference in the mount parser
- Fix memory stomp in decode_attr_security_label
- Fix credential leak in _nfs4_discover_trunking()
- Fix buffer leak in rpcrdma_req_create()
- Fix leaked socket in rpc_sockname()
- Fix deadlock between nfs4_open_recover_helper() and delegreturn
- Fix an Oops in nfs_d_automount()
- Fix potential race in nfs_call_unlink()
- Multiple fixes for the open context mode
- NFSv4.2 READ_PLUS fixes
- Fix a regression in which small rsize/wsize values are being
forbidden
- Fail client initialisation if the NFSv4.x state manager thread
can't run
- Avoid spurious warning of lost lock that is being unlocked.
- Ensure the initialisation of struct nfs4_label
Features and cleanups:
- Trigger the "ls -l" readdir heuristic sooner
- Clear the file access cache upon login to ensure supplementary
group info is in sync between the client and server
- pnfs: Fix up the logging of layout stateids
- NFSv4.2: Change the default KConfig value for READ_PLUS
- Use sysfs_emit() instead of scnprintf() where appropriate"
* tag 'nfs-for-6.2-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (24 commits)
NFSv4.2: Change the default KConfig value for READ_PLUS
NFSv4.x: Fail client initialisation if state manager thread can't run
fs: nfs: sysfs: use sysfs_emit() to instead of scnprintf()
NFS: use sysfs_emit() to instead of scnprintf()
NFS: Allow very small rsize & wsize again
NFSv4.2: Fix up READ_PLUS alignment
NFSv4.2: Set the correct size scratch buffer for decoding READ_PLUS
SUNRPC: Fix missing release socket in rpc_sockname()
xprtrdma: Fix regbuf data not freed in rpcrdma_req_create()
NFS: avoid spurious warning of lost lock that is being unlocked.
nfs: fix possible null-ptr-deref when parsing param
NFSv4: check FMODE_EXEC from open context mode in nfs4_opendata_access()
NFS: make sure open context mode have FMODE_EXEC when file open for exec
NFS4.x/pnfs: Fix up logging of layout stateids
NFS: Fix a race in nfs_call_unlink()
NFS: Fix an Oops in nfs_d_automount()
NFSv4: Fix a deadlock between nfs4_open_recover_helper() and delegreturn
NFSv4: Fix a credential leak in _nfs4_discover_trunking()
NFS: Trigger the "ls -l" readdir heuristic sooner
NFSv4.2: Fix initialisation of struct nfs4_label
...
This release introduces support for the CB_RECALL_ANY operation.
NFSD can send this operation to request that clients return any
delegations they choose. The server uses this operation to handle
low memory scenarios or indicate to a client when that client has
reached the maximum number of delegations the server supports.
The NFSv4.2 READ_PLUS operation has been simplified temporarily
whilst support for sparse files in local filesystems and the VFS is
improved.
Two major data structure fixes appear in this release:
* The nfs4_file hash table is replaced with a resizable hash table
to reduce the latency of NFSv4 OPEN operations.
* Reference counting in the NFSD filecache has been hardened against
races.
In furtherance of removing support for NFSv2 in a subsequent kernel
release, a new Kconfig option enables server-side support for NFSv2
to be left out of a kernel build.
MAINTAINERS has been updated to indicate that changes to fs/exportfs
should go through the NFSD tree.
-----BEGIN PGP SIGNATURE-----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=jNlu
-----END PGP SIGNATURE-----
Merge tag 'nfsd-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd updates from Chuck Lever:
"This release introduces support for the CB_RECALL_ANY operation. NFSD
can send this operation to request that clients return any delegations
they choose. The server uses this operation to handle low memory
scenarios or indicate to a client when that client has reached the
maximum number of delegations the server supports.
The NFSv4.2 READ_PLUS operation has been simplified temporarily whilst
support for sparse files in local filesystems and the VFS is improved.
Two major data structure fixes appear in this release:
- The nfs4_file hash table is replaced with a resizable hash table to
reduce the latency of NFSv4 OPEN operations.
- Reference counting in the NFSD filecache has been hardened against
races.
In furtherance of removing support for NFSv2 in a subsequent kernel
release, a new Kconfig option enables server-side support for NFSv2 to
be left out of a kernel build.
MAINTAINERS has been updated to indicate that changes to fs/exportfs
should go through the NFSD tree"
* tag 'nfsd-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (49 commits)
NFSD: Avoid clashing function prototypes
SUNRPC: Fix crasher in unwrap_integ_data()
SUNRPC: Make the svc_authenticate tracepoint conditional
NFSD: Use only RQ_DROPME to signal the need to drop a reply
SUNRPC: Clean up xdr_write_pages()
SUNRPC: Don't leak netobj memory when gss_read_proxy_verf() fails
NFSD: add CB_RECALL_ANY tracepoints
NFSD: add delegation reaper to react to low memory condition
NFSD: add support for sending CB_RECALL_ANY
NFSD: refactoring courtesy_client_reaper to a generic low memory shrinker
trace: Relocate event helper files
NFSD: pass range end to vfs_fsync_range() instead of count
lockd: fix file selection in nlmsvc_cancel_blocked
lockd: ensure we use the correct file descriptor when unlocking
lockd: set missing fl_flags field when retrieving args
NFSD: Use struct_size() helper in alloc_session()
nfsd: return error if nfs4_setacl fails
lockd: set other missing fields when unlocking files
NFSD: Add an nfsd_file_fsync tracepoint
sunrpc: svc: Remove an unused static function svc_ungetu32()
...
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY5bwTgAKCRCRxhvAZXjc
ovd2AQCK00NAtGjQCjQPQGyTa4GAPqvWgq1ef0lnhv+TL5US5gD9FncQ8UofeMXt
pBfjtAD6ettTPCTxUQfnTwWEU4rc7Qg=
=27Wm
-----END PGP SIGNATURE-----
Merge tag 'fs.acl.rework.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping
Pull VFS acl updates from Christian Brauner:
"This contains the work that builds a dedicated vfs posix acl api.
The origins of this work trace back to v5.19 but it took quite a while
to understand the various filesystem specific implementations in
sufficient detail and also come up with an acceptable solution.
As we discussed and seen multiple times the current state of how posix
acls are handled isn't nice and comes with a lot of problems: The
current way of handling posix acls via the generic xattr api is error
prone, hard to maintain, and type unsafe for the vfs until we call
into the filesystem's dedicated get and set inode operations.
It is already the case that posix acls are special-cased to death all
the way through the vfs. There are an uncounted number of hacks that
operate on the uapi posix acl struct instead of the dedicated vfs
struct posix_acl. And the vfs must be involved in order to interpret
and fixup posix acls before storing them to the backing store, caching
them, reporting them to userspace, or for permission checking.
Currently a range of hacks and duct tape exist to make this work. As
with most things this is really no ones fault it's just something that
happened over time. But the code is hard to understand and difficult
to maintain and one is constantly at risk of introducing bugs and
regressions when having to touch it.
Instead of continuing to hack posix acls through the xattr handlers
this series builds a dedicated posix acl api solely around the get and
set inode operations.
Going forward, the vfs_get_acl(), vfs_remove_acl(), and vfs_set_acl()
helpers must be used in order to interact with posix acls. They
operate directly on the vfs internal struct posix_acl instead of
abusing the uapi posix acl struct as we currently do. In the end this
removes all of the hackiness, makes the codepaths easier to maintain,
and gets us type safety.
This series passes the LTP and xfstests suites without any
regressions. For xfstests the following combinations were tested:
- xfs
- ext4
- btrfs
- overlayfs
- overlayfs on top of idmapped mounts
- orangefs
- (limited) cifs
There's more simplifications for posix acls that we can make in the
future if the basic api has made it.
A few implementation details:
- The series makes sure to retain exactly the same security and
integrity module permission checks. Especially for the integrity
modules this api is a win because right now they convert the uapi
posix acl struct passed to them via a void pointer into the vfs
struct posix_acl format to perform permission checking on the mode.
There's a new dedicated security hook for setting posix acls which
passes the vfs struct posix_acl not a void pointer. Basing checking
on the posix acl stored in the uapi format is really unreliable.
The vfs currently hacks around directly in the uapi struct storing
values that frankly the security and integrity modules can't
correctly interpret as evidenced by bugs we reported and fixed in
this area. It's not necessarily even their fault it's just that the
format we provide to them is sub optimal.
- Some filesystems like 9p and cifs need access to the dentry in
order to get and set posix acls which is why they either only
partially or not even at all implement get and set inode
operations. For example, cifs allows setxattr() and getxattr()
operations but doesn't allow permission checking based on posix
acls because it can't implement a get acl inode operation.
Thus, this patch series updates the set acl inode operation to take
a dentry instead of an inode argument. However, for the get acl
inode operation we can't do this as the old get acl method is
called in e.g., generic_permission() and inode_permission(). These
helpers in turn are called in various filesystem's permission inode
operation. So passing a dentry argument to the old get acl inode
operation would amount to passing a dentry to the permission inode
operation which we shouldn't and probably can't do.
So instead of extending the existing inode operation Christoph
suggested to add a new one. He also requested to ensure that the
get and set acl inode operation taking a dentry are consistently
named. So for this version the old get acl operation is renamed to
->get_inode_acl() and a new ->get_acl() inode operation taking a
dentry is added. With this we can give both 9p and cifs get and set
acl inode operations and in turn remove their complex custom posix
xattr handlers.
In the future I hope to get rid of the inode method duplication but
it isn't like we have never had this situation. Readdir is just one
example. And frankly, the overall gain in type safety and the more
pleasant api wise are simply too big of a benefit to not accept
this duplication for a while.
- We've done a full audit of every codepaths using variant of the
current generic xattr api to get and set posix acls and
surprisingly it isn't that many places. There's of course always a
chance that we might have missed some and if so I'm sure we'll find
them soon enough.
The crucial codepaths to be converted are obviously stacking
filesystems such as ecryptfs and overlayfs.
For a list of all callers currently using generic xattr api helpers
see [2] including comments whether they support posix acls or not.
- The old vfs generic posix acl infrastructure doesn't obey the
create and replace semantics promised on the setxattr(2) manpage.
This patch series doesn't address this. It really is something we
should revisit later though.
The patches are roughly organized as follows:
(1) Change existing set acl inode operation to take a dentry
argument (Intended to be a non-functional change)
(2) Rename existing get acl method (Intended to be a non-functional
change)
(3) Implement get and set acl inode operations for filesystems that
couldn't implement one before because of the missing dentry.
That's mostly 9p and cifs (Intended to be a non-functional
change)
(4) Build posix acl api, i.e., add vfs_get_acl(), vfs_remove_acl(),
and vfs_set_acl() including security and integrity hooks
(Intended to be a non-functional change)
(5) Implement get and set acl inode operations for stacking
filesystems (Intended to be a non-functional change)
(6) Switch posix acl handling in stacking filesystems to new posix
acl api now that all filesystems it can stack upon support it.
(7) Switch vfs to new posix acl api (semantical change)
(8) Remove all now unused helpers
(9) Additional regression fixes reported after we merged this into
linux-next
Thanks to Seth for a lot of good discussion around this and
encouragement and input from Christoph"
* tag 'fs.acl.rework.v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping: (36 commits)
posix_acl: Fix the type of sentinel in get_acl
orangefs: fix mode handling
ovl: call posix_acl_release() after error checking
evm: remove dead code in evm_inode_set_acl()
cifs: check whether acl is valid early
acl: make vfs_posix_acl_to_xattr() static
acl: remove a slew of now unused helpers
9p: use stub posix acl handlers
cifs: use stub posix acl handlers
ovl: use stub posix acl handlers
ecryptfs: use stub posix acl handlers
evm: remove evm_xattr_acl_change()
xattr: use posix acl api
ovl: use posix acl api
ovl: implement set acl method
ovl: implement get acl method
ecryptfs: implement set acl method
ecryptfs: implement get acl method
ksmbd: use vfs_remove_acl()
acl: add vfs_remove_acl()
...
direction misannotations and (hopefully) preventing
more of the same for the future.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-----BEGIN PGP SIGNATURE-----
iHQEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCY5ZzQAAKCRBZ7Krx/gZQ
65RZAP4nTkvOn0NZLVFkuGOx8pgJelXAvrteyAuecVL8V6CR4AD40qCVY51PJp8N
MzwiRTeqnGDxTTF7mgd//IB6hoatAA==
=bcvF
-----END PGP SIGNATURE-----
Merge tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull iov_iter updates from Al Viro:
"iov_iter work; most of that is about getting rid of direction
misannotations and (hopefully) preventing more of the same for the
future"
* tag 'pull-iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
use less confusing names for iov_iter direction initializers
iov_iter: saner checks for attempt to copy to/from iterator
[xen] fix "direction" argument of iov_iter_kvec()
[vhost] fix 'direction' argument of iov_iter_{init,bvec}()
[target] fix iov_iter_bvec() "direction" argument
[s390] memcpy_real(): WRITE is "data source", not destination...
[s390] zcore: WRITE is "data source", not destination...
[infiniband] READ is "data destination", not source...
[fsi] WRITE is "data source", not destination...
[s390] copy_oldmem_kernel() - WRITE is "data source", not destination
csum_and_copy_to_iter(): handle ITER_DISCARD
get rid of unlikely() on page_copy_sane() calls
Now that we've worked out performance issues and have a server patch
addressing the failed xfstests, we can safely enable this feature by
default.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Steven Rostedt says:
> The include/trace/events/ directory should only hold files that
> are to create events, not headers that hold helper functions.
>
> Can you please move them out of include/trace/events/ as that
> directory is "special" in the creation of events.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If the state manager thread fails to start, then we should just mark the
client initialisation as failed so that other processes or threads don't
get stuck in nfs_wait_client_init_complete().
Reported-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Fixes: 4697bd5e94 ("NFSv4: Fix a race in the net namespace mount notification")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
940261a195 introduced nfs_io_size() to clamp the iosize to a multiple
of PAGE_SIZE. This had the unintended side effect of no longer allowing
iosizes less than a page, which could be useful in some situations.
UDP already has an exception that causes it to fall back on the
power-of-two style sizes instead. This patch adds an additional
exception for very small iosizes.
Reported-by: Jeff Layton <jlayton@kernel.org>
Fixes: 940261a195 ("NFS: Allow setting rsize / wsize to a multiple of PAGE_SIZE")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Assume that the first segment will be a DATA segment, and place the data
directly into the xdr pages so it doesn't need to be shifted.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
The scratch_buf array is 16 bytes, but I was passing 32 to the
xdr_set_scratch_buffer() function. Fix this by using sizeof(), which is
what I probably should have been doing this whole time.
Fixes: d3b00a802c ("NFS: Replace the READ_PLUS decoding code")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When the NFSv4 state manager recovers state after a server restart, it
reports that locks have been lost if it finds any lock state for which
recovery hasn't been successful. i.e. any for which
NFS_LOCK_INITIALIZED is not set.
However it only tries to recover locks that are still linked to
inode->i_flctx. So if a lock has been removed from inode->i_flctx, but
the state for that lock has not yet been destroyed, then a spurious
warning results.
nfs4_proc_unlck() calls locks_lock_inode_wait() - which removes the lock
from ->i_flctx - before sending the unlock request to the server and
before the final nfs4_put_lock_state() is called. This allows a window
in which a spurious warning can be produced.
So add a new flag NFS_LOCK_UNLOCKING which is set once the decision has
been made to unlock the lock. This will prevent it from triggering any
warning.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
According to commit "vfs: parse: deal with zero length string value",
kernel will set the param->string to null pointer in vfs_parse_fs_string()
if fs string has zero length.
Yet the problem is that, nfs_fs_context_parse_param() will dereferences the
param->string, without checking whether it is a null pointer, which may
trigger a null-ptr-deref bug.
This patch solves it by adding sanity check on param->string
in nfs_fs_context_parse_param().
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
After converting file f_flags to open context mode by flags_to_mode(), open
context mode will have FMODE_EXEC when file open for exec, so we check
FMODE_EXEC from open context mode.
No functional change, just simplify the code.
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Because file f_mode never have FMODE_EXEC, open context mode won't get
FMODE_EXEC from file f_mode. Open context mode only care about FMODE_READ/
FMODE_WRITE/FMODE_EXEC, and all info about open context mode can be convert
from file f_flags, so convert file f_flags to open context mode by
flags_to_mode().
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
nfs currently doesn't access i_flctx safely. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
We should check that the filehandles match before transferring the
sillyrename data to the newly looked-up dentry in case the name was
reused on the server.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When mounting from a NFSv4 referral, path->dentry can end up being a
negative dentry, so derive the struct nfs_server from the dentry
itself instead.
Fixes: 2b0143b5c9 ("VFS: normal filesystems (and lustre): d_inode() annotations")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If we're asked to recover open state while a delegation return is
outstanding, then the state manager thread cannot use a cached open, so
if the server returns a delegation, we can end up deadlocked behind the
pending delegreturn.
To avoid this problem, let's just ask the server not to give us a
delegation unless we're explicitly reclaiming one.
Fixes: be36e185bd ("NFSv4: nfs4_open_recover_helper() must set share access")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Since commit 1a34c8c9a4 ("NFS: Support larger readdir buffers") has
updated dtsize, and with recent improvements to the READDIRPLUS helper
heuristic, the heuristic may not trigger until many dentries are emitted
to userspace. This will cause many thousands of GETATTR calls for "ls
-l" when the directory's pagecache has already been populated. This
manifests as poor performance for long directory listings after an
initially fast "ls -l".
Fix this by emitting only 17 entries for any first pass through the NFS
directory's ->iterate_shared(), which allows userpace to prime the
counters for the heuristic.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
The call to nfs4_label_init_security() should return a fully initialised
label.
Fixes: aa9c266962 ("NFS: Client implementation of Labeled-NFS")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
We must not change the value of label->len if it is zero, since that
indicates we stored a label.
Fixes: b4487b9354 ("nfs: Fix getxattr kernel panic and memory overflow")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If the server returns a reply that includes a security label, then we
must decode it whether or not we can store the results.
Fixes: 1e2f67da89 ("NFS: Remove the nfs4_label argument from decode_getattr_*() functions")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
We need to clear the FATTR4_WORD2_SECURITY_LABEL bitmap flag
irrespective of whether or not the label is too long.
Fixes: aa9c266962 ("NFS: Client implementation of Labeled-NFS")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
POSIX typically only refreshes the user's supplementary group
information upon login. Since NFS servers may often refresh their
concept of the user supplementary group membership at their own cadence,
it is possible for the NFS client's access cache to become stale due to
the user's group membership changing on the server after the user has
already logged in on the client.
While it is reasonable to expect that such group membership changes are
rare, and that we do not want to optimise the cache to accommodate them,
it is also not unreasonable for the user to expect that if they log out
and log back in again, that the staleness would clear up.
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
READ/WRITE proved to be actively confusing - the meanings are
"data destination, as used with read(2)" and "data source, as
used with write(2)", but people keep interpreting those as
"we read data from it" and "we write data to it", i.e. exactly
the wrong way.
Call them ITER_DEST and ITER_SOURCE - at least that is harder
to misinterpret...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The call, kobject_get_ownership(), does not modify the kobject passed
into it, so make it const. This propagates down into the kobj_type
function callbacks so make the kobject passed into them also const,
ensuring that nothing in the kobject is being changed here.
This helps make it more obvious what calls and callbacks do, and do not,
modify structures passed to them.
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Roopa Prabhu <roopa@nvidia.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: linux-nfs@vger.kernel.org
Cc: bridge@lists.linux-foundation.org
Cc: netdev@vger.kernel.org
Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20221121094649.1556002-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A common exploit pattern for ROP attacks is to abuse prepare_kernel_cred()
in order to construct escalated privileges[1]. Instead of providing a
short-hand argument (NULL) to the "daemon" argument to indicate using
init_cred as the base cred, require that "daemon" is always set to
an actual task. Replace all existing callers that were passing NULL
with &init_task.
Future attacks will need to have sufficiently powerful read/write
primitives to have found an appropriately privileged task and written it
to the ROP stack as an argument to succeed, which is similarly difficult
to the prior effort needed to escalate privileges before struct cred
existed: locate the current cred and overwrite the uid member.
This has the added benefit of meaning that prepare_kernel_cred() can no
longer exceed the privileges of the init task, which may have changed from
the original init_cred (e.g. dropping capabilities from the bounding set).
[1] https://google.com/search?q=commit_creds(prepare_kernel_cred(0))
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Steve French <sfrench@samba.org>
Cc: Ronnie Sahlberg <lsahlber@redhat.com>
Cc: Shyam Prasad N <sprasad@microsoft.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: "Michal Koutný" <mkoutny@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Cc: linux-nfs@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Russ Weight <russell.h.weight@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Link: https://lore.kernel.org/r/20221026232943.never.775-kees@kernel.org
When holding a delegation, the NFS client optimizes away setting the
attributes of a file from the GETATTR in the compound after CLONE, and for
a zero-length CLONE we will end up setting the inode's size to zero in
nfs42_copy_dest_done(). Handle this case by computing the resulting count
from the server's reported size after CLONE's GETATTR.
Suggested-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 94d202d5ca ("NFSv42: Copy offload should update the file size when appropriate")
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
There's a small window where a LOCK sent during a delegation return can
race with another OPEN on client, but the open stateid has not yet been
updated. In this case, the client doesn't handle the OLD_STATEID error
from the server and will lose this lock, emitting:
"NFS: nfs4_handle_delegation_recall_error: unhandled error -10024".
Fix this by sending the task through the nfs4 error handling in
nfs4_lock_done() when we may have to reconcile our stateid with what the
server believes it to be. For this case, the result is a retry of the
LOCK operation with the updated stateid.
Reported-by: Gonzalo Siero Humet <gsierohu@redhat.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Currently, we are only guaranteed to send RECLAIM_COMPLETE if we have
open state to recover. Fix the client to always send RECLAIM_COMPLETE
after setting up the lease.
Fixes: fce5c838e1 ("nfs41: RECLAIM_COMPLETE functionality")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If RECLAIM_COMPLETE sets the NFS4CLNT_BIND_CONN_TO_SESSION flag, then we
need to loop back in order to handle it.
Fixes: 0048fdd066 ("NFSv4.1: RECLAIM_COMPLETE must handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
If the server reboots while we are engaged in a delegation return, and
there is a pNFS layout with return-on-close set, then the current code
can end up deadlocking in pnfs_roc() when nfs_inode_set_delegation()
tries to return the old delegation.
Now that delegreturn actually uses its own copy of the stateid, it
should be safe to just always update the delegation stateid in place.
Fixes: 078000d02d ("pNFS: We want return-on-close to complete when evicting the inode")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
The 'nfs_server' and 'mount_server' structures include a union of
'struct sockaddr' (with the older 16 bytes max address size) and
'struct sockaddr_storage' which is large enough to hold all the
supported sa_family types (128 bytes max size). The runtime memcpy()
buffer overflow checker is seeing attempts to write beyond the 16
bytes as an overflow, but the actual expected size is that of 'struct
sockaddr_storage'. Plumb the use of 'struct sockaddr_storage' more
completely through-out NFS, which results in adjusting the memcpy()
buffers to the correct union members. Avoids this false positive run-time
warning under CONFIG_FORTIFY_SOURCE:
memcpy: detected field-spanning write (size 28) of single field "&ctx->nfs_server.address" at fs/nfs/namespace.c:178 (size 16)
Reported-by: kernel test robot <yujie.liu@intel.com>
Link: https://lore.kernel.org/all/202210110948.26b43120-yujie.liu@intel.com
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Fix the following coccicheck warning:
fs/nfs/dir.c:2494:2-7: WARNING:
NULL check before some freeing functions is not needed.
Signed-off-by: Yushan Zhou <katrinzhou@tencent.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
The current inode operation for getting posix acls takes an inode
argument but various filesystems (e.g., 9p, cifs, overlayfs) need access
to the dentry. In contrast to the ->set_acl() inode operation we cannot
simply extend ->get_acl() to take a dentry argument. The ->get_acl()
inode operation is called from:
acl_permission_check()
-> check_acl()
-> get_acl()
which is part of generic_permission() which in turn is part of
inode_permission(). Both generic_permission() and inode_permission() are
called in the ->permission() handler of various filesystems (e.g.,
overlayfs). So simply passing a dentry argument to ->get_acl() would
amount to also having to pass a dentry argument to ->permission(). We
should avoid this unnecessary change.
So instead of extending the existing inode operation rename it from
->get_acl() to ->get_inode_acl() and add a ->get_acl() method later that
passes a dentry argument and which filesystems that need access to the
dentry can implement instead of ->get_inode_acl(). Filesystems like cifs
which allow setting and getting posix acls but not using them for
permission checking during lookup can simply not implement
->get_inode_acl().
This is intended to be a non-functional change.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Suggested-by/Inspired-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
The current way of setting and getting posix acls through the generic
xattr interface is error prone and type unsafe. The vfs needs to
interpret and fixup posix acls before storing or reporting it to
userspace. Various hacks exist to make this work. The code is hard to
understand and difficult to maintain in it's current form. Instead of
making this work by hacking posix acls through xattr handlers we are
building a dedicated posix acl api around the get and set inode
operations. This removes a lot of hackiness and makes the codepaths
easier to maintain. A lot of background can be found in [1].
Since some filesystem rely on the dentry being available to them when
setting posix acls (e.g., 9p and cifs) they cannot rely on set acl inode
operation. But since ->set_acl() is required in order to use the generic
posix acl xattr handlers filesystems that do not implement this inode
operation cannot use the handler and need to implement their own
dedicated posix acl handlers.
Update the ->set_acl() inode method to take a dentry argument. This
allows all filesystems to rely on ->set_acl().
As far as I can tell all codepaths can be switched to rely on the dentry
instead of just the inode. Note that the original motivation for passing
the dentry separate from the inode instead of just the dentry in the
xattr handlers was because of security modules that call
security_d_instantiate(). This hook is called during
d_instantiate_new(), d_add(), __d_instantiate_anon(), and
d_splice_alias() to initialize the inode's security context and possibly
to set security.* xattrs. Since this only affects security.* xattrs this
is completely irrelevant for posix acls.
Link: https://lore.kernel.org/all/20220801145520.1532837-1-brauner@kernel.org [1]
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
- New Features:
- Add NFSv4.2 xattr tracepoints
- Replace xprtiod WQ in rpcrdma
- Flexfiles cancels I/O on layout recall or revoke
- Bugfixes and Cleanups:
- Directly use ida_alloc() / ida_free()
- Don't open-code max_t()
- Prefer using strscpy over strlcpy
- Remove unused forward declarations
- Always return layout states on flexfiles layout return
- Have LISTXATTR treat NFS4ERR_NOXATTR as an empty reply instead of error
- Allow more xprtrdma memory allocations to fail without triggering a reclaim
- Various other xprtrdma clean ups
- Fix rpc_killall_tasks() races
-----BEGIN PGP SIGNATURE-----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=p47k
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client updates from Anna Schumaker:
"New Features:
- Add NFSv4.2 xattr tracepoints
- Replace xprtiod WQ in rpcrdma
- Flexfiles cancels I/O on layout recall or revoke
Bugfixes and Cleanups:
- Directly use ida_alloc() / ida_free()
- Don't open-code max_t()
- Prefer using strscpy over strlcpy
- Remove unused forward declarations
- Always return layout states on flexfiles layout return
- Have LISTXATTR treat NFS4ERR_NOXATTR as an empty reply instead of
error
- Allow more xprtrdma memory allocations to fail without triggering a
reclaim
- Various other xprtrdma clean ups
- Fix rpc_killall_tasks() races"
* tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (27 commits)
NFSv4/flexfiles: Cancel I/O if the layout is recalled or revoked
SUNRPC: Add API to force the client to disconnect
SUNRPC: Add a helper to allow pNFS drivers to selectively cancel RPC calls
SUNRPC: Fix races with rpc_killall_tasks()
xprtrdma: Fix uninitialized variable
xprtrdma: Prevent memory allocations from driving a reclaim
xprtrdma: Memory allocation should be allowed to fail during connect
xprtrdma: MR-related memory allocation should be allowed to fail
xprtrdma: Clean up synopsis of rpcrdma_regbuf_alloc()
xprtrdma: Clean up synopsis of rpcrdma_req_create()
svcrdma: Clean up RPCRDMA_DEF_GFP
SUNRPC: Replace the use of the xprtiod WQ in rpcrdma
NFSv4.2: Add a tracepoint for listxattr
NFSv4.2: Add tracepoints for getxattr, setxattr, and removexattr
NFSv4.2: Move TRACE_DEFINE_ENUM(NFS4_CONTENT_*) under CONFIG_NFS_V4_2
NFSv4.2: Add special handling for LISTXATTR receiving NFS4ERR_NOXATTR
nfs: remove nfs_wait_atomic_killable() and nfs_write_prepare() declaration
NFSv4: remove nfs4_renewd_prepare_shutdown() declaration
fs/nfs/pnfs_nfs.c: fix spelling typo and syntax error in comment
NFSv4/pNFS: Always return layout stats on layout return for flexfiles
...
- Debuggability:
- Change most occurances of BUG_ON() to WARN_ON_ONCE()
- Reorganize & fix TASK_ state comparisons, turn it into a bitmap
- Update/fix misc scheduler debugging facilities
- Load-balancing & regular scheduling:
- Improve the behavior of the scheduler in presence of lot of
SCHED_IDLE tasks - in particular they should not impact other
scheduling classes.
- Optimize task load tracking, cleanups & fixes
- Clean up & simplify misc load-balancing code
- Freezer:
- Rewrite the core freezer to behave better wrt thawing and be simpler
in general, by replacing PF_FROZEN with TASK_FROZEN & fixing/adjusting
all the fallout.
- Deadline scheduler:
- Fix the DL capacity-aware code
- Factor out dl_task_is_earliest_deadline() & replenish_dl_new_period()
- Relax/optimize locking in task_non_contending()
- Cleanups:
- Factor out the update_current_exec_runtime() helper
- Various cleanups, simplifications
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=KjMD
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Debuggability:
- Change most occurances of BUG_ON() to WARN_ON_ONCE()
- Reorganize & fix TASK_ state comparisons, turn it into a bitmap
- Update/fix misc scheduler debugging facilities
Load-balancing & regular scheduling:
- Improve the behavior of the scheduler in presence of lot of
SCHED_IDLE tasks - in particular they should not impact other
scheduling classes.
- Optimize task load tracking, cleanups & fixes
- Clean up & simplify misc load-balancing code
Freezer:
- Rewrite the core freezer to behave better wrt thawing and be
simpler in general, by replacing PF_FROZEN with TASK_FROZEN &
fixing/adjusting all the fallout.
Deadline scheduler:
- Fix the DL capacity-aware code
- Factor out dl_task_is_earliest_deadline() &
replenish_dl_new_period()
- Relax/optimize locking in task_non_contending()
Cleanups:
- Factor out the update_current_exec_runtime() helper
- Various cleanups, simplifications"
* tag 'sched-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
sched: Fix more TASK_state comparisons
sched: Fix TASK_state comparisons
sched/fair: Move call to list_last_entry() in detach_tasks
sched/fair: Cleanup loop_max and loop_break
sched/fair: Make sure to try to detach at least one movable task
sched: Show PF_flag holes
freezer,sched: Rewrite core freezer logic
sched: Widen TAKS_state literals
sched/wait: Add wait_event_state()
sched/completion: Add wait_for_completion_state()
sched: Add TASK_ANY for wait_task_inactive()
sched: Change wait_task_inactive()s match_state
freezer,umh: Clean up freezer/initrd interaction
freezer: Have {,un}lock_system_sleep() save/restore flags
sched: Rename task_running() to task_on_cpu()
sched/fair: Cleanup for SIS_PROP
sched/fair: Default to false in test_idle_cores()
sched/fair: Remove useless check in select_idle_core()
sched/fair: Avoid double search on same cpu
sched/fair: Remove redundant check in select_idle_smt()
...
