Commit graph

3893 commits

Author SHA1 Message Date
Chuck Lever
2e38722d4a NFSD: Add nfsd4_encode_fattr4_time_create()
Refactor the encoder for FATTR4_TIME_CREATE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:23 -04:00
Chuck Lever
eed4d1adbb NFSD: Add nfsd4_encode_fattr4_time_access()
Refactor the encoder for FATTR4_TIME_ACCESS into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:23 -04:00
Chuck Lever
6d37ac3adb NFSD: Add nfsd4_encode_fattr4_space_used()
Refactor the encoder for FATTR4_SPACE_USED into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:22 -04:00
Chuck Lever
d0cde979e9 NFSD: Add nfsd4_encode_fattr4_space_total()
Refactor the encoder for FATTR4_SPACE_TOTAL into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:22 -04:00
Chuck Lever
74ebc69705 NFSD: Add nfsd4_encode_fattr4_space_free()
Refactor the encoder for FATTR4_SPACE_FREE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:22 -04:00
Chuck Lever
83afa09179 NFSD: Add nfsd4_encode_fattr4_space_avail()
Refactor the encoder for FATTR4_SPACE_AVAIL into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:21 -04:00
Chuck Lever
a460cda28e NFSD: Add nfsd4_encode_fattr4_rawdev()
Refactor the encoder for FATTR4_RAWDEV into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:21 -04:00
Chuck Lever
62f31e56d5 NFSD: Add nfsd4_encode_fattr4_owner_group()
Refactor the encoder for FATTR4_OWNER_GROUP into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:21 -04:00
Chuck Lever
fa51a5201b NFSD: Add nfsd4_encode_fattr4_owner()
Refactor the encoder for FATTR4_OWNER into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:20 -04:00
Chuck Lever
9f329fea25 NFSD: Add nfsd4_encode_fattr4_numlinks()
Refactor the encoder for FATTR4_NUMLINKS into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:20 -04:00
Chuck Lever
f4cf504201 NFSD: Add nfsd4_encode_fattr4_mode()
Refactor the encoder for FATTR4_MODE into a helper. In a subsequent
patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:20 -04:00
Chuck Lever
951378dc96 NFSD: Add nfsd4_encode_fattr4_maxwrite()
Refactor the encoder for FATTR4_MAXWRITE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:19 -04:00
Chuck Lever
c17195c397 NFSD: Add nfsd4_encode_fattr4_maxread()
Refactor the encoder for FATTR4_MAXREAD into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:19 -04:00
Chuck Lever
9c1adaccd1 NFSD: Add nfsd4_encode_fattr4_maxname()
Refactor the encoder for FATTR4_MAXNAME into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:19 -04:00
Chuck Lever
b066aa5ca3 NFSD: Add nfsd4_encode_fattr4_maxlink()
Refactor the encoder for FATTR4_MAXLINK into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:18 -04:00
Chuck Lever
7c605dccc5 NFSD: Add nfsd4_encode_fattr4_maxfilesize()
Refactor the encoder for FATTR4_MAXFILESIZE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:18 -04:00
Chuck Lever
a1469a3704 NFSD: Add nfsd4_encode_fattr4_fs_locations()
Refactor the encoder for FATTR4_FS_LOCATIONS into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:18 -04:00
Chuck Lever
b56b752663 NFSD: Add nfsd4_encode_fattr4_files_total()
Refactor the encoder for FATTR4_FILES_TOTAL into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:17 -04:00
Chuck Lever
74361e2b5d NFSD: Add nfsd4_encode_fattr4_files_free()
Refactor the encoder for FATTR4_FILES_FREE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:17 -04:00
Chuck Lever
b0c3a5f8c8 NFSD: Add nfsd4_encode_fattr4_files_avail()
Refactor the encoder for FATTR4_FILES_AVAIL into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:17 -04:00
Chuck Lever
eb7ece81d5 NFSD: Add nfsd4_encode_fattr4_fileid()
Refactor the encoder for FATTR4_FILEID into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:17 -04:00
Chuck Lever
3283bf64ef NFSD: Add nfsd4_encode_fattr4_filehandle()
Refactor the encoder for FATTR4_FILEHANDLE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

We can de-duplicate the other filehandle encoder (in GETFH) using
our new helper.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:16 -04:00
Chuck Lever
07455dc45d NFSD: Add nfsd4_encode_fattr4_acl()
Refactor the encoder for FATTR4_ACL into a helper. In a subsequent
patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:16 -04:00
Chuck Lever
0207ee0818 NFSD: Add nfsd4_encode_nfsace4()
Refactor the ACE encoding helper so that it can eventually be reused
for encoding OPEN results that contain delegation ACEs.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:16 -04:00
Chuck Lever
6515b7d71d NFSD: Add nfsd4_encode_fattr4_aclsupport()
Refactor the encoder for FATTR4_ACLSUPPORT into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:15 -04:00
Chuck Lever
782448e1ec NFSD: Add nfsd4_encode_fattr4_rdattr_error()
Refactor the encoder for FATTR4_RDATTR_ERROR into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:15 -04:00
Chuck Lever
1252b283aa NFSD: Add nfsd4_encode_fattr4_lease_time()
Refactor the encoder for FATTR4_LEASE_TIME into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:15 -04:00
Chuck Lever
b6b6259590 NFSD: Add nfsd4_encode_fattr4_fsid()
Refactor the encoder for FATTR4_FSID into a helper. In a subsequent
patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:14 -04:00
Chuck Lever
d0b28aadfd NFSD: Add nfsd4_encode_fattr4_size()
Refactor the encoder for FATTR4_SIZE into a helper. In a subsequent
patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:14 -04:00
Chuck Lever
263453d9bb NFSD: Add nfsd4_encode_fattr4_change()
Refactor the encoder for FATTR4_CHANGE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

The code is restructured a bit to use the modern xdr_stream flow,
and the encoded cinfo value is made const so that callers of the
encoders can be passed a const cinfo.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:14 -04:00
Chuck Lever
36ed7e6494 NFSD: Add nfsd4_encode_fattr4_fh_expire_type()
Refactor the encoder for FATTR4_FH_EXPIRE_TYPE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:13 -04:00
Chuck Lever
b06cf37545 NFSD: Add nfsd4_encode_fattr4_type()
Refactor the encoder for FATTR4_TYPE into a helper. In a subsequent
patch, this helper will be called from a bitmask loop.

In addition, restructure the code so that byte-swapping is done on
constant values rather than at run time. Run-time swapping can be
costly on some platforms, and "type" is a frequently-requested
attribute.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:13 -04:00
Chuck Lever
c9090e2733 NFSD: Add nfsd4_encode_fattr4_supported_attrs()
Refactor the encoder for FATTR4_SUPPORTED_ATTRS into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:13 -04:00
Chuck Lever
8c4422881f NFSD: Add nfsd4_encode_fattr4__false()
Add an encoding helper that encodes a single boolean "false" value.
Attributes that always return "false" can use this helper.

In a subsequent patch, this helper will be called from a bitmask
loop, so it is given a standardized synopsis.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:12 -04:00
Chuck Lever
c88cb4727a NFSD: Add nfsd4_encode_fattr4__true()
Add an encoding helper that encodes a single boolean "true" value.
Attributes that always return "true" can use this helper.

In a subsequent patch, this helper will be called from a bitmask
loop, so it is given a standardized synopsis.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:12 -04:00
Chuck Lever
83ab8678ad NFSD: Add struct nfsd4_fattr_args
I'm about to split nfsd4_encode_fattr() into a number of smaller
functions. Instead of passing a large number of arguments to each of
the smaller functions, create a struct that can gather the common
argument variables into something with a convenient handle on it.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:12 -04:00
Chuck Lever
c3dcb45bcd NFSD: Clean up nfsd4_encode_setattr()
De-duplicate the encoding of bitmap4 results in
nfsd4_encode_setattr().

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:11 -04:00
Chuck Lever
e64301f51b NFSD: Rename nfsd4_encode_bitmap()
For alignment with the specification, the name of NFSD's encoder
function should match the name of the XDR type.

I've also replaced a few "naked integers" with symbolic constants
that better reflect the usage of these values.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:11 -04:00
Chuck Lever
6cc5829140 NFSD: Add simple u32, u64, and bool encoders
The generic XDR encoders return a length or a negative errno. NFSv4
encoders want to know simply whether the encode ran out of stream
buffer space. The return values for server-side encoding are either
nfs_ok or nfserr_resource.

So far I've found it adds a lot of duplicate code to try to use the
generic XDR encoder utilities when encoding the simple data types in
the NFSv4 operation encoders.

Add a set of NFSv4-specific utilities that handle the basic XDR data
types. These are added in xdr4.h so they might eventually be used by
the callback server and pNFS driver encoders too.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:11 -04:00
Lorenzo Bianconi
bd9d6a3efa NFSD: add rpc_status netlink support
Introduce rpc_status netlink support for NFSD in order to dump pending
RPC requests debugging information from userspace.

Closes: https://bugzilla.linux-nfs.org/show_bug.cgi?id=366
Tested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:09 -04:00
Lorenzo Bianconi
13727f85b4 NFSD: introduce netlink stubs
Generate stubs and uAPI for nfsd netlink protocol. For the moment,
the new protocol has one operation: rpc_status.

The generated header and source files are created by running:

  tools/net/ynl/ynl-regen.sh

Tested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:09 -04:00
Dai Ngo
6c41d9a9bd NFSD: handle GETATTR conflict with write delegation
If the GETATTR request on a file that has write delegation in effect
and the request attributes include the change info and size attribute
then the request is handled as below:

Server sends CB_GETATTR to client to get the latest change info and file
size. If these values are the same as the server's cached values then
the GETATTR proceeds as normal.

If either the change info or file size is different from the server's
cached values, or the file was already marked as modified, then:

    . update time_modify and time_metadata into file's metadata
      with current time

    . encode GETATTR as normal except the file size is encoded with
      the value returned from CB_GETATTR

    . mark the file as modified

If the CB_GETATTR fails for any reasons, the delegation is recalled
and NFS4ERR_DELAY is returned for the GETATTR.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:09 -04:00
Dai Ngo
738401a9bd NFSD: add support for CB_GETATTR callback
Includes:
   . CB_GETATTR proc for nfs4_cb_procedures[]
   . XDR encoding and decoding function for CB_GETATTR request/reply
   . add nfs4_cb_fattr to nfs4_delegation for sending CB_GETATTR
     and store file attributes from client's reply.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:08 -04:00
NeilBrown
2e8fc923fe SUNRPC: change sp_nrthreads to atomic_t
Using an atomic_t avoids the need to take a spinlock (which can soon be
removed).

Choosing a thread to kill needs to be careful as we cannot set the "die
now" bit atomically with the test on the count.  Instead we temporarily
increase the count.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:07 -04:00
NeilBrown
fa341560ca SUNRPC: change how svc threads are asked to exit.
svc threads are currently stopped using kthread_stop().  This requires
identifying a specific thread.  However we don't care which thread
stops, just as long as one does.

So instead, set a flag in the svc_pool to say that a thread needs to
die, and have each thread check this flag instead of calling
kthread_should_stop().  The first thread to find and clear this flag
then moves towards exiting.

This removes an explicit dependency on sp_all_threads which will make a
future patch simpler.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:04 -04:00
Alexander Aring
2dd10de8e6 lockd: introduce safe async lock op
This patch reverts mostly commit 40595cdc93 ("nfs: block notification
on fs with its own ->lock") and introduces an EXPORT_OP_ASYNC_LOCK
export flag to signal that the "own ->lock" implementation supports
async lock requests. The only main user is DLM that is used by GFS2 and
OCFS2 filesystem. Those implement their own lock() implementation and
return FILE_LOCK_DEFERRED as return value. Since commit 40595cdc93
("nfs: block notification on fs with its own ->lock") the DLM
implementation were never updated. This patch should prepare for DLM
to set the EXPORT_OP_ASYNC_LOCK export flag and update the DLM
plock implementation regarding to it.

Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:01 -04:00
Trond Myklebust
1b2021bdee nfsd: Don't reset the write verifier on a commit EAGAIN
If fsync() is returning EAGAIN, then we can assume that the filesystem
being exported is something like NFS with the 'softerr' mount option
enabled, and that it is just asking us to replay the fsync() operation
at a later date.

If we see an ESTALE, then ditto: the file is gone, so there is no danger
of losing the error.

For those cases, do not reset the write verifier. A write verifier
change has a global effect, causing retransmission by all clients of
all uncommitted unstable writes for all files, so it is worth
mitigating where possible.

Link: https://lore.kernel.org/linux-nfs/20230911184357.11739-1-trond.myklebust@hammerspace.com/
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:01 -04:00
Trond Myklebust
d59b3515ab nfsd: Handle EOPENSTALE correctly in the filecache
The nfsd_open code handles EOPENSTALE correctly, by retrying the call to
fh_verify() and __nfsd_open(). However the filecache just drops the
error on the floor, and immediately returns nfserr_stale to the caller.

This patch ensures that we propagate the EOPENSTALE code back to
nfsd_file_do_acquire, and that we handle it correctly.

Fixes: 65294c1f2c ("nfsd: add a new struct file caching facility to nfsd")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Message-Id: <20230911183027.11372-1-trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:00 -04:00
Dai Ngo
5896a87054 NFSD: add trace points to track server copy progress
Add trace points on destination server to track inter and intra
server copy operations.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Tested-by: Chen Hanxiao <chenhx.fnst@fujitsu.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:00 -04:00
Dai Ngo
15d1975b72 NFSD: initialize copy->cp_clp early in nfsd4_copy for use by trace point
Prepare for adding server copy trace points.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Tested-by: Chen Hanxiao <chenhx.fnst@fujitsu.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-10-16 12:44:00 -04:00
Qi Zheng
8eea99a81c nfsd: dynamically allocate the nfsd-reply shrinker
In preparation for implementing lockless slab shrink, use new APIs to
dynamically allocate the nfsd-reply shrinker, so that it can be freed
asynchronously via RCU. Then it doesn't need to wait for RCU read-side
critical section when releasing the struct nfsd_net.

Link: https://lkml.kernel.org/r/20230911094444.68966-34-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Olga Kornievskaia <kolga@netapp.com>
Cc: Dai Ngo <Dai.Ngo@oracle.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Carlos Llamas <cmllamas@google.com>
Cc: Chandan Babu R <chandan.babu@oracle.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Coly Li <colyli@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Darrick J. Wong" <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Airlie <airlied@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jeffle Xu <jefflexu@linux.alibaba.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Kirill Tkhai <tkhai@ya.ru>
Cc: Marijn Suijten <marijn.suijten@somainline.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nadav Amit <namit@vmware.com>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Sean Paul <sean@poorly.run>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Song Liu <song@kernel.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Steven Price <steven.price@arm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-10-04 10:32:25 -07:00
Qi Zheng
d17452aa33 nfsd: dynamically allocate the nfsd-client shrinker
In preparation for implementing lockless slab shrink, use new APIs to
dynamically allocate the nfsd-client shrinker, so that it can be freed
asynchronously via RCU. Then it doesn't need to wait for RCU read-side
critical section when releasing the struct nfsd_net.

Link: https://lkml.kernel.org/r/20230911094444.68966-33-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Olga Kornievskaia <kolga@netapp.com>
Cc: Dai Ngo <Dai.Ngo@oracle.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Carlos Llamas <cmllamas@google.com>
Cc: Chandan Babu R <chandan.babu@oracle.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Coly Li <colyli@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Darrick J. Wong" <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Airlie <airlied@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jeffle Xu <jefflexu@linux.alibaba.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Kirill Tkhai <tkhai@ya.ru>
Cc: Marijn Suijten <marijn.suijten@somainline.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Sean Paul <sean@poorly.run>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Song Liu <song@kernel.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Steven Price <steven.price@arm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-10-04 10:32:25 -07:00
Qi Zheng
856e594965 nfsd: dynamically allocate the nfsd-filecache shrinker
Use new APIs to dynamically allocate the nfsd-filecache shrinker.

Link: https://lkml.kernel.org/r/20230911094444.68966-13-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Olga Kornievskaia <kolga@netapp.com>
Cc: Dai Ngo <Dai.Ngo@oracle.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Carlos Llamas <cmllamas@google.com>
Cc: Chandan Babu R <chandan.babu@oracle.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Coly Li <colyli@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Darrick J. Wong" <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Airlie <airlied@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jeffle Xu <jefflexu@linux.alibaba.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Kirill Tkhai <tkhai@ya.ru>
Cc: Marijn Suijten <marijn.suijten@somainline.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nadav Amit <namit@vmware.com>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Sean Paul <sean@poorly.run>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Song Liu <song@kernel.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Steven Price <steven.price@arm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Yue Hu <huyue2@coolpad.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-10-04 10:32:24 -07:00
Linus Torvalds
ae21363998 nfsd-6.6 fixes:
- Fix NFSv4 READ corner case
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmUYSnEACgkQM2qzM29m
 f5dtSxAAk/n3CzeIJFALIcP+JmHW6Zh2KbpygcqhxFoO1FAyRBJgOIEhtdD/c65Q
 fzfCQDZUzdTSirklBS5m0lIMhqaYMe1LUC8OIq/hh309vQ6WnlLltIU3fsaZFva5
 kAaDeI/oGq2YnbjQENWCGHvKC7RR1jOTWASI/+52oYg/fwRkt14so/wDl54mxhNP
 q6Gt0Xw/mXkslAkQNQ+7a5eAa4TtepzkjkNWL4hSqboHQ4QFT2tmXqDV3E+V9tzX
 F/tlEN3EJo3nDNcUYAh6ec/YXo0tBh4DsnJxA9bRYloU40EUGP19ewXLEQgXPw9M
 IgSNluxTmDTQGz6kSUkQpepevWDUN0+fDt1kVqACIRXuvuMcGuDUCbD4VMa8HNnc
 bCMg8R/SkrBnzTamHJpPhbV/F/C0Iwp80RpqDMAnt4splrQUCJeB+Wl1qJAnYUW5
 TdJxSJKCvypMIcNCd1ZMSVbeByUgZ/qXKKsS2YNS4l8+DGdnEJQ2mnFKw3Nk5bEF
 byWoyW6RMXCIwaqQa8hNsO5kW4MTxURxLXcgqzN7+5L2ht7pAYpNjnOc0vIBPe5t
 9z+/dSk8a9QXBwRTxPL4QOgludXPqvokGBtCIV1LD5xQA9OZuXivnBz2DWmCt+IR
 GOYfjs3gSlvVrv7+EGffYlOh9f7GN/wlUfUxERKcB6HPweGOtqs=
 =aD10
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:

 - Fix NFSv4 READ corner case

* tag 'nfsd-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: Fix zero NFSv4 READ results when RQ_SPLICE_OK is not set
2023-09-30 09:44:48 -07:00
Chuck Lever
0d32a6bbb8 NFSD: Fix zero NFSv4 READ results when RQ_SPLICE_OK is not set
nfsd4_encode_readv() uses xdr->buf->page_len as a starting point for
the nfsd_iter_read() sink buffer -- page_len is going to be offset
by the parts of the COMPOUND that have already been encoded into
xdr->buf->pages.

However, that value must be captured /before/
xdr_reserve_space_vec() advances page_len by the expected size of
the read payload. Otherwise, the whole front part of the first
page of the payload in the reply will be uninitialized.

Mantas hit this because sec=krb5i forces RQ_SPLICE_OK off, which
invokes the readv part of the nfsd4_encode_read() path. Also,
older Linux NFS clients appear to send shorter READ requests
for files smaller than a page, whereas newer clients just send
page-sized requests and let the server send as many bytes as
are in the file.

Reported-by: Mantas Mikulėnas <grawity@gmail.com>
Closes: https://lore.kernel.org/linux-nfs/f1d0b234-e650-0f6e-0f5d-126b3d51d1eb@gmail.com/
Fixes: 703d752155 ("NFSD: Hoist rq_vec preparation into nfsd_read() [step two]")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-09-28 10:34:28 -04:00
Linus Torvalds
d8d7cd6563 nfsd-6.6 fixes:
- Use correct order when encoding NFSv4 RENAME change_info
 - Fix a potential oops during NFSD shutdown
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmUEf90ACgkQM2qzM29m
 f5dcrhAAjz3SLoz4nAlo441JMATp/auwqTBKlWvNUWbK/ZgYjUcTXH8RfPbBQ/Yl
 5NfsThubmPTSr/bNvV+C963C4c/25d45SYwabAdLoZWKIpWf1mCDNhE1JkGQoM83
 KyZcrLnEknh/fN6jAxueFhWPCaavGDK8eI8H6Ls33GvX0cG4S7IYseGZ1x2dMWpE
 XFnV8oAWSD3cjKrTGwPYja2W0ShISGn4UMnj+lPWEpfCDydnQzKh87dhWzvlAxCf
 4Ckikmv3vcCfm15Ja0JZX3K1cvh0A3oISbgN/QNqGpzDzQ1qyugsx9uNltDa76N8
 NzGENnvO2/WURkw4DHJYIsiNt82uB04NYSAL6mLat3GU4DeAKOl3r+9W0jZPFS17
 7mOLh9dqg3ubSxOr6BpeY4I6+Uq2enUTwh1+VkvC7hQ906ZY8kzaj5MtLddvkjCw
 p4BTDzH280AwtnwiJ7q0WvBR5TxdGc3fqqsLJ+yMX2aGdhM1iMOjjENoSc3+v+Cy
 pEK1tju/lDzcMZrl5A08Za30L5boHp11n5SLia7tctKiFs4biL3WwNu527Y/Klq6
 04DtkcXdF/tW702388sKL1UnnXhw4KA8k7Us4HrQL+zXDZ+/UJ+AzY6s8ls2ytbN
 0NESe/ntsKjoijrRphAp+RgC8fhC7iT0GMJP8OHyHUqEOU2Wrbw=
 =ZTRy
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Use correct order when encoding NFSv4 RENAME change_info

 - Fix a potential oops during NFSD shutdown

* tag 'nfsd-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: fix possible oops when nfsd/pool_stats is closed.
  nfsd: fix change_info in NFSv4 RENAME replies
2023-09-15 16:48:44 -07:00
NeilBrown
88956eabfd NFSD: fix possible oops when nfsd/pool_stats is closed.
If /proc/fs/nfsd/pool_stats is open when the last nfsd thread exits, then
when the file is closed a NULL pointer is dereferenced.
This is because nfsd_pool_stats_release() assumes that the
pointer to the svc_serv cannot become NULL while a reference is held.

This used to be the case but a recent patch split nfsd_last_thread() out
from nfsd_put(), and clearing the pointer is done in nfsd_last_thread().

This is easily reproduced by running
   rpc.nfsd 8 ; ( rpc.nfsd 0;true) < /proc/fs/nfsd/pool_stats

Fortunately nfsd_pool_stats_release() has easy access to the svc_serv
pointer, and so can call svc_put() on it directly.

Fixes: 9f28a971ee ("nfsd: separate nfsd_last_thread() from nfsd_put()")
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-09-12 09:39:35 -04:00
Jeff Layton
fdd2630a73 nfsd: fix change_info in NFSv4 RENAME replies
nfsd sends the transposed directory change info in the RENAME reply. The
source directory is in save_fh and the target is in current_fh.

Reported-by: Zhi Li <yieli@redhat.com>
Reported-by: Benjamin Coddington <bcodding@redhat.com>
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2218844
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-09-09 13:24:52 -04:00
Linus Torvalds
f35d170615 NFSD 6.6 Release Notes
I'm thrilled to announce that the Linux in-kernel NFS server now
 offers NFSv4 write delegations. A write delegation enables a client
 to cache data and metadata for a single file more aggressively,
 reducing network round trips and server workload. Many thanks to Dai
 Ngo for contributing this facility, and to Jeff Layton and Neil
 Brown for reviewing and testing it.
 
 This release also sees the removal of all support for DES- and
 triple-DES-based Kerberos encryption types in the kernel's SunRPC
 implementation. These encryption types have been deprecated by the
 Internet community for years and are considered insecure. This
 change affects both the in-kernel NFS client and server.
 
 The server's UDP and TCP socket transports have now fully adopted
 David Howells' new bio_vec iterator so that no more than one
 sendmsg() call is needed to transmit each RPC message. In
 particular, this helps kTLS optimize record boundaries when sending
 RPC-with-TLS replies, and it takes the server a baby step closer to
 handling file I/O via folios.
 
 We've begun work on overhauling the SunRPC thread scheduler to
 remove a costly linked-list walk when looking for an idle RPC
 service thread to wake. The pre-requisites are included in this
 release. Thanks to Neil Brown for his ongoing work on this
 improvement.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmTwoa0ACgkQM2qzM29m
 f5cZvw/8CmFVNC27aMrJEhRRhwwrXbLzUkWh9GCYkG98PHYiLxLTvZ6qELXAax/a
 UjSgIDSRcWl4z8M/tyBQtgsw7NADr+7XWqEoXR7HZ5pEEC/KNGM0oQWQ92ojjKYy
 JmHdB02uaDJfcd9ioFTU13cw7q2BQfoe2xLI8yqis2vcVSu92AM7aIw+cvJIpwQB
 inA3TIIsYTV/gPByXSfEtvmYACadoFiMvfvYwaWhjFS9MdSzFmcVG0Dp3EFIig29
 odmWEofcz6uIvUWvUswWEGdoSu7uOKIztSuAI4PlTwaofUaSKG6e5kmtpr3cLERD
 Uhg2lm5JgqkXBd7QHObNimJ4DtQzFwHmhA08qo8rd/zba75mn/Hr5IF0q3Rxs99J
 SRYHcAeP8afKn5Ge0yzoTgCNcqhfz8KLRfoCQX49mljr+muNxld4nMklD2KdUwJi
 XEB512/q3E4nUgopXZiSJYQYAq1CfdR5WpGipZ9X0XK9HZBDF/qhXGtk1YQuNWyj
 ZxJS3bfBza4oVIvP5/ehjCIQwOvqkcrC5zZGDIgDvw9Q6L3L1wqmVntsdCLCLRcJ
 jB4IOsj+DECfJ6w2vP2SZ3GeMtFnyuTQjhUTkjPuAKTBBiKo4Tj0o/agpfDYbWZy
 1l3a2yH5jqJgkm4MaVh3YHRJGc0ub0ccpIrs3QQ4jvjMLQ/3Gcs=
 =XGHs
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:
 "I'm thrilled to announce that the Linux in-kernel NFS server now
  offers NFSv4 write delegations. A write delegation enables a client to
  cache data and metadata for a single file more aggressively, reducing
  network round trips and server workload. Many thanks to Dai Ngo for
  contributing this facility, and to Jeff Layton and Neil Brown for
  reviewing and testing it.

  This release also sees the removal of all support for DES- and
  triple-DES-based Kerberos encryption types in the kernel's SunRPC
  implementation. These encryption types have been deprecated by the
  Internet community for years and are considered insecure. This change
  affects both the in-kernel NFS client and server.

  The server's UDP and TCP socket transports have now fully adopted
  David Howells' new bio_vec iterator so that no more than one sendmsg()
  call is needed to transmit each RPC message. In particular, this helps
  kTLS optimize record boundaries when sending RPC-with-TLS replies, and
  it takes the server a baby step closer to handling file I/O via
  folios.

  We've begun work on overhauling the SunRPC thread scheduler to remove
  a costly linked-list walk when looking for an idle RPC service thread
  to wake. The pre-requisites are included in this release. Thanks to
  Neil Brown for his ongoing work on this improvement"

* tag 'nfsd-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (56 commits)
  Documentation: Add missing documentation for EXPORT_OP flags
  SUNRPC: Remove unused declaration rpc_modcount()
  SUNRPC: Remove unused declarations
  NFSD: da_addr_body field missing in some GETDEVICEINFO replies
  SUNRPC: Remove return value of svc_pool_wake_idle_thread()
  SUNRPC: make rqst_should_sleep() idempotent()
  SUNRPC: Clean up svc_set_num_threads
  SUNRPC: Count ingress RPC messages per svc_pool
  SUNRPC: Deduplicate thread wake-up code
  SUNRPC: Move trace_svc_xprt_enqueue
  SUNRPC: Add enum svc_auth_status
  SUNRPC: change svc_xprt::xpt_flags bits to enum
  SUNRPC: change svc_rqst::rq_flags bits to enum
  SUNRPC: change svc_pool::sp_flags bits to enum
  SUNRPC: change cache_head.flags bits to enum
  SUNRPC: remove timeout arg from svc_recv()
  SUNRPC: change svc_recv() to return void.
  SUNRPC: call svc_process() from svc_recv().
  nfsd: separate nfsd_last_thread() from nfsd_put()
  nfsd: Simplify code around svc_exit_thread() call in nfsd()
  ...
2023-08-31 15:32:18 -07:00
Chuck Lever
6372e2ee62 NFSD: da_addr_body field missing in some GETDEVICEINFO replies
The XDR specification in RFC 8881 looks like this:

struct device_addr4 {
	layouttype4	da_layout_type;
	opaque		da_addr_body<>;
};

struct GETDEVICEINFO4resok {
	device_addr4	gdir_device_addr;
	bitmap4		gdir_notification;
};

union GETDEVICEINFO4res switch (nfsstat4 gdir_status) {
case NFS4_OK:
	GETDEVICEINFO4resok gdir_resok4;
case NFS4ERR_TOOSMALL:
	count4		gdir_mincount;
default:
	void;
};

Looking at nfsd4_encode_getdeviceinfo() ....

When the client provides a zero gd_maxcount, then the Linux NFS
server implementation encodes the da_layout_type field and then
skips the da_addr_body field completely, proceeding directly to
encode gdir_notification field.

There does not appear to be an option in the specification to skip
encoding da_addr_body. Moreover, Section 18.40.3 says:

> If the client wants to just update or turn off notifications, it
> MAY send a GETDEVICEINFO operation with gdia_maxcount set to zero.
> In that event, if the device ID is valid, the reply's da_addr_body
> field of the gdir_device_addr field will be of zero length.

Since the layout drivers are responsible for encoding the
da_addr_body field, put this fix inside the ->encode_getdeviceinfo
methods.

Fixes: 9cf514ccfa ("nfsd: implement pNFS operations")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Tom Haynes <loghyr@gmail.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
c743b4259c SUNRPC: remove timeout arg from svc_recv()
Most svc threads have no interest in a timeout.
nfsd sets it to 1 hour, but this is a wart of no significance.

lockd uses the timeout so that it can call nlmsvc_retry_blocked().
It also sometimes calls svc_wake_up() to ensure this is called.

So change lockd to be consistent and always use svc_wake_up() to trigger
nlmsvc_retry_blocked() - using a timer instead of a timeout to
svc_recv().

And change svc_recv() to not take a timeout arg.

This makes the sp_threads_timedout counter always zero.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
7b719e2bf3 SUNRPC: change svc_recv() to return void.
svc_recv() currently returns a 0 on success or one of two errors:
 - -EAGAIN means no message was successfully received
 - -EINTR means the thread has been told to stop

Previously nfsd would stop as the result of a signal as well as
following kthread_stop().  In that case the difference was useful: EINTR
means stop unconditionally.  EAGAIN means stop if kthread_should_stop(),
continue otherwise.

Now threads only exit when kthread_should_stop() so we don't need the
distinction.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
f78116d3bf SUNRPC: call svc_process() from svc_recv().
All callers of svc_recv() go on to call svc_process() on success.
Simplify callers by having svc_recv() do that for them.

This loses one call to validate_process_creds() in nfsd.  That was
debugging code added 14 years ago.  I don't think we need to keep it.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
9f28a971ee nfsd: separate nfsd_last_thread() from nfsd_put()
Now that the last nfsd thread is stopped by an explicit act of calling
svc_set_num_threads() with a count of zero, we only have a limited
number of places that can happen, and don't need to call
nfsd_last_thread() in nfsd_put()

So separate that out and call it at the two places where the number of
threads is set to zero.

Move the clearing of ->nfsd_serv and the call to svc_xprt_destroy_all()
into nfsd_last_thread(), as they are really part of the same action.

nfsd_put() is now a thin wrapper around svc_put(), so make it a static
inline.

nfsd_put() cannot be called after nfsd_last_thread(), so in a couple of
places we have to use svc_put() instead.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
18e4cf9155 nfsd: Simplify code around svc_exit_thread() call in nfsd()
Previously a thread could exit asynchronously (due to a signal) so some
care was needed to hold nfsd_mutex over the last svc_put() call.  Now a
thread can only exit when svc_set_num_threads() is called, and this is
always called under nfsd_mutex.  So no care is needed.

Not only is the mutex held when a thread exits now, but the svc refcount
is elevated, so the svc_put() in svc_exit_thread() will never be a final
put, so the mutex isn't even needed at this point in the code.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
NeilBrown
3903902401 nfsd: don't allow nfsd threads to be signalled.
The original implementation of nfsd used signals to stop threads during
shutdown.
In Linux 2.3.46pre5 nfsd gained the ability to shutdown threads
internally it if was asked to run "0" threads.  After this user-space
transitioned to using "rpc.nfsd 0" to stop nfsd and sending signals to
threads was no longer an important part of the API.

In commit 3ebdbe5203 ("SUNRPC: discard svo_setup and rename
svc_set_num_threads_sync()") (v5.17-rc1~75^2~41) we finally removed the
use of signals for stopping threads, using kthread_stop() instead.

This patch makes the "obvious" next step and removes the ability to
signal nfsd threads - or any svc threads.  nfsd stops allowing signals
and we don't check for their delivery any more.

This will allow for some simplification in later patches.

A change worth noting is in nfsd4_ssc_setup_dul().  There was previously
a signal_pending() check which would only succeed when the thread was
being shut down.  It should really have tested kthread_should_stop() as
well.  Now it just does the latter, not the former.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Jeff Layton
d424797032 nfsd: inherit required unset default acls from effective set
A well-formed NFSv4 ACL will always contain OWNER@/GROUP@/EVERYONE@
ACEs, but there is no requirement for inheritable entries for those
entities. POSIX ACLs must always have owner/group/other entries, even for a
default ACL.

nfsd builds the default ACL from inheritable ACEs, but the current code
just leaves any unspecified ACEs zeroed out. The result is that adding a
default user or group ACE to an inode can leave it with unwanted deny
entries.

For instance, a newly created directory with no acl will look something
like this:

	# NFSv4 translation by server
	A::OWNER@:rwaDxtTcCy
	A::GROUP@:rxtcy
	A::EVERYONE@:rxtcy

	# POSIX ACL of underlying file
	user::rwx
	group::r-x
	other::r-x

...if I then add new v4 ACE:

	nfs4_setfacl -a A:fd:1000:rwx /mnt/local/test

...I end up with a result like this today:

	user::rwx
	user:1000:rwx
	group::r-x
	mask::rwx
	other::r-x
	default:user::---
	default:user:1000:rwx
	default:group::---
	default😷:rwx
	default:other::---

	A::OWNER@:rwaDxtTcCy
	A::1000:rwaDxtcy
	A::GROUP@:rxtcy
	A::EVERYONE@:rxtcy
	D:fdi:OWNER@:rwaDx
	A:fdi:OWNER@:tTcCy
	A:fdi:1000:rwaDxtcy
	A:fdi:GROUP@:tcy
	A:fdi:EVERYONE@:tcy

...which is not at all expected. Adding a single inheritable allow ACE
should not result in everyone else losing access.

The setfacl command solves a silimar issue by copying owner/group/other
entries from the effective ACL when none of them are set:

    "If a Default ACL entry is created, and the  Default  ACL  contains  no
     owner,  owning group,  or  others  entry,  a  copy of the ACL owner,
     owning group, or others entry is added to the Default ACL.

Having nfsd do the same provides a more sane result (with no deny ACEs
in the resulting set):

	user::rwx
	user:1000:rwx
	group::r-x
	mask::rwx
	other::r-x
	default:user::rwx
	default:user:1000:rwx
	default:group::r-x
	default😷:rwx
	default:other::r-x

	A::OWNER@:rwaDxtTcCy
	A::1000:rwaDxtcy
	A::GROUP@:rxtcy
	A::EVERYONE@:rxtcy
	A:fdi:OWNER@:rwaDxtTcCy
	A:fdi:1000:rwaDxtcy
	A:fdi:GROUP@:rxtcy
	A:fdi:EVERYONE@:rxtcy

Reported-by: Ondrej Valousek <ondrej.valousek@diasemi.com>
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2136452
Suggested-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Jeff Layton
f2b7019d2e nfsd: set missing after_change as before_change + 1
In the event that we can't fetch post_op_attr attributes, we still need
to set a value for the after_change. The operation has already happened,
so we're not able to return an error at that point, but we do want to
ensure that the client knows that its cache should be invalidated.

If we weren't able to fetch post-op attrs, then just set the
after_change to before_change + 1. The atomic flag should already be
clear in this case.

Suggested-by: Neil Brown <neilb@suse.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Jeff Layton
976626073a nfsd: remove unsafe BUG_ON from set_change_info
At one time, nfsd would scrape inode information directly out of struct
inode in order to populate the change_info4. At that time, the BUG_ON in
set_change_info made some sense, since having it unset meant a coding
error.

More recently, it calls vfs_getattr to get this information, which can
fail. If that fails, fh_pre_saved can end up not being set. While this
situation is unfortunate, we don't need to crash the box.

Move set_change_info to nfs4proc.c since all of the callers are there.
Revise the condition for setting "atomic" to also check for
fh_pre_saved. Drop the BUG_ON and just have it zero out both
change_attr4s when this occurs.

Reported-by: Boyang Xue <bxue@redhat.com>
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2223560
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Jeff Layton
a332018a91 nfsd: handle failure to collect pre/post-op attrs more sanely
Collecting pre_op_attrs can fail, in which case it's probably best to
fail the whole operation.

Change fh_fill_pre_attrs and fh_fill_both_attrs to return __be32, and
have the callers check the return code and abort the operation if it's
not nfs_ok.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Jeff Layton
5865bafa19 nfsd: add a MODULE_DESCRIPTION
I got this today from modpost:

    WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nfsd/nfsd.o

Add a module description.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
e7421ce714 NFSD: Rename struct svc_cacherep
The svc_ prefix is identified with the SunRPC layer. Although the
duplicate reply cache caches RPC replies, it is only for the NFS
protocol. Rename the struct to better reflect its purpose.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
cb18eca4b8 NFSD: Remove svc_rqst::rq_cacherep
Over time I'd like to see NFS-specific fields moved out of struct
svc_rqst, which is an RPC layer object. These fields are layering
violations.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
c135e1269f NFSD: Refactor the duplicate reply cache shrinker
Avoid holding the bucket lock while freeing cache entries. This
change also caps the number of entries that are freed when the
shrinker calls to reduce the shrinker's impact on the cache's
effectiveness.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
a9507f6af1 NFSD: Replace nfsd_prune_bucket()
Enable nfsd_prune_bucket() to drop the bucket lock while calling
kfree(). Use the same pattern that Jeff recently introduced in the
NFSD filecache.

A few percpu operations are moved outside the lock since they
temporarily disable local IRQs which is expensive and does not
need to be done while the lock is held.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
ff0d169329 NFSD: Rename nfsd_reply_cache_alloc()
For readability, rename to match the other helpers.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
35308e7f0f NFSD: Refactor nfsd_reply_cache_free_locked()
To reduce contention on the bucket locks, we must avoid calling
kfree() while each bucket lock is held.

Start by refactoring nfsd_reply_cache_free_locked() into a helper
that removes an entry from the bucket (and must therefore run under
the lock) and a second helper that frees the entry (which does not
need to hold the lock).

For readability, rename the helpers nfsd_cacherep_<verb>.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Dai Ngo
1d3dd1d56c NFSD: Enable write delegation support
This patch grants write delegations for OPEN with NFS4_SHARE_ACCESS_WRITE
if there is no conflict with other OPENs.

Write delegation conflicts with another OPEN, REMOVE, RENAME and SETATTR
are handled the same as read delegation using notify_change,
try_break_deleg.

The NFSv4.0 protocol does not enable a server to determine that a
conflicting GETATTR originated from the client holding the
delegation versus coming from some other client. With NFSv4.1 and
later, the SEQUENCE operation that begins each COMPOUND contains a
client ID, so delegation recall can be safely squelched in this case.

With NFSv4.0, however, the server must recall or send a CB_GETATTR
(per RFC 7530 Section 16.7.5) even when the GETATTR originates from
the client holding that delegation.

An NFSv4.0 client can trigger a pathological situation if it always
sends a DELEGRETURN preceded by a conflicting GETATTR in the same
COMPOUND. COMPOUND execution will always stop at the GETATTR and the
DELEGRETURN will never get executed. The server eventually revokes
the delegation, which can result in loss of open or lock state.

Tracepoint added to track whether read or write delegation is granted.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Chuck Lever
50bce06f0e NFSD: Report zero space limit for write delegations
Replace the -1 (no limit) with a zero (no reserved space).

This prevents certain non-determinant client behavior, such as
silly-renaming a file when the only open reference is a write
delegation. Such a rename can leave unexpected .nfs files in a
directory that is otherwise supposed to be empty.

Note that other server implementations that support write delegation
also set this field to zero.

Suggested-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Dai Ngo
fd19ca36fd NFSD: handle GETATTR conflict with write delegation
If the GETATTR request on a file that has write delegation in effect and
the request attributes include the change info and size attribute then
the write delegation is recalled. If the delegation is returned within
30ms then the GETATTR is serviced as normal otherwise the NFS4ERR_DELAY
error is returned for the GETATTR.

Add counter for write delegation recall due to conflict GETATTR. This is
used to evaluate the need to implement CB_GETATTR to adoid recalling the
delegation with conflit GETATTR.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-29 17:45:22 -04:00
Linus Torvalds
615e95831e v6.6-vfs.ctime
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZOXTKAAKCRCRxhvAZXjc
 oifJAQCzi/p+AdQu8LA/0XvR7fTwaq64ZDCibU4BISuLGT2kEgEAuGbuoFZa0rs2
 XYD/s4+gi64p9Z01MmXm2XO1pu3GPg0=
 =eJz5
 -----END PGP SIGNATURE-----

Merge tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs timestamp updates from Christian Brauner:
 "This adds VFS support for multi-grain timestamps and converts tmpfs,
  xfs, ext4, and btrfs to use them. This carries acks from all relevant
  filesystems.

  The VFS always uses coarse-grained timestamps when updating the ctime
  and mtime after a change. This has the benefit of allowing filesystems
  to optimize away a lot of metadata updates, down to around 1 per
  jiffy, even when a file is under heavy writes.

  Unfortunately, this has always been an issue when we're exporting via
  NFSv3, which relies on timestamps to validate caches. A lot of changes
  can happen in a jiffy, so timestamps aren't sufficient to help the
  client decide to invalidate the cache.

  Even with NFSv4, a lot of exported filesystems don't properly support
  a change attribute and are subject to the same problems with timestamp
  granularity. Other applications have similar issues with timestamps
  (e.g., backup applications).

  If we were to always use fine-grained timestamps, that would improve
  the situation, but that becomes rather expensive, as the underlying
  filesystem would have to log a lot more metadata updates.

  This introduces fine-grained timestamps that are used when they are
  actively queried.

  This uses the 31st bit of the ctime tv_nsec field to indicate that
  something has queried the inode for the mtime or ctime. When this flag
  is set, on the next mtime or ctime update, the kernel will fetch a
  fine-grained timestamp instead of the usual coarse-grained one.

  As POSIX generally mandates that when the mtime changes, the ctime
  must also change the kernel always stores normalized ctime values, so
  only the first 30 bits of the tv_nsec field are ever used.

  Filesytems can opt into this behavior by setting the FS_MGTIME flag in
  the fstype. Filesystems that don't set this flag will continue to use
  coarse-grained timestamps.

  Various preparatory changes, fixes and cleanups are included:

   - Fixup all relevant places where POSIX requires updating ctime
     together with mtime. This is a wide-range of places and all
     maintainers provided necessary Acks.

   - Add new accessors for inode->i_ctime directly and change all
     callers to rely on them. Plain accesses to inode->i_ctime are now
     gone and it is accordingly rename to inode->__i_ctime and commented
     as requiring accessors.

   - Extend generic_fillattr() to pass in a request mask mirroring in a
     sense the statx() uapi. This allows callers to pass in a request
     mask to only get a subset of attributes filled in.

   - Rework timestamp updates so it's possible to drop the @now
     parameter the update_time() inode operation and associated helpers.

   - Add inode_update_timestamps() and convert all filesystems to it
     removing a bunch of open-coding"

* tag 'v6.6-vfs.ctime' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (107 commits)
  btrfs: convert to multigrain timestamps
  ext4: switch to multigrain timestamps
  xfs: switch to multigrain timestamps
  tmpfs: add support for multigrain timestamps
  fs: add infrastructure for multigrain timestamps
  fs: drop the timespec64 argument from update_time
  xfs: have xfs_vn_update_time gets its own timestamp
  fat: make fat_update_time get its own timestamp
  fat: remove i_version handling from fat_update_time
  ubifs: have ubifs_update_time use inode_update_timestamps
  btrfs: have it use inode_update_timestamps
  fs: drop the timespec64 arg from generic_update_time
  fs: pass the request_mask to generic_fillattr
  fs: remove silly warning from current_time
  gfs2: fix timestamp handling on quota inodes
  fs: rename i_ctime field to __i_ctime
  selinux: convert to ctime accessor functions
  security: convert to ctime accessor functions
  apparmor: convert to ctime accessor functions
  sunrpc: convert to ctime accessor functions
  ...
2023-08-28 09:31:32 -07:00
Linus Torvalds
f8d6ff4490 nfsd-6.5 fixes:
- Close race window when handling FREE_STATEID operations
 - Fix regression in /proc/fs/nfsd/v4_end_grace introduced in v6.5-rc
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmTntHEACgkQM2qzM29m
 f5cGgQ//ZvUW1Vvp+s86puw+EyEtwu15Ms19kTYNR+AKebpPz/c9K9iEF3nmZXEL
 bRn25fELtzXYi8rqavrv8fMj7dQhmkT3DE0WaJcTtCLD5N5bGDO3mQeoQ1fKGR1r
 rHITp0jC25Viur7kXhXU6qIcvu0VthK+feW/DMlkKsmSlQE5V4utxUGYZp8gfZGU
 7cbYRpCqF2J1bJSPxH/lKpg5ZHztpZW6aPXG7frHcg04qsfqrMRS0HqG8KYaAKXh
 BObBqSYDo8agOa3u361pBZoVZHF2/7gFXlZKIZdp+6F5/B1IjoN+7eWnI7hFxiH7
 zf5jLa9xlWrXr2vQTuPEJa9dCr756Ixzq7IJ7ZzIMOpVypixZ04jBLfnuhcnayu9
 8k/0CFqQwmfvIcXgJEpTJ+OKm0kDqI3n7WE9gkeYBkRewEvJQXaFZ/vqTYi7bp9H
 eWlwQ4bHE5touERBMp0HmDdct/ZdUn8dS6MDcdGFXrVf5m+Jt6hZCXTnpU3Ah+zF
 d0uK4IEwJ2yC9FhBqOYZ6+XBr1JA+40vdnHOBvKdpAzQnIdwnNa4rzR0Eab6+m4i
 fmhI63s9slPBcBMroRC0mhftcdkd7LjBhhWbsDu8nemKmmHcOKzwTda78EayQYnm
 /zJUVr8BqzkgaJG1PUn9y0g4IOfgTiokDmBdLu6bTAanRtekhVY=
 =BF07
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:
 "Two last-minute one-liners for v6.5-rc. One got lost in the shuffle,
  and the other was reported just this morning"

   - Close race window when handling FREE_STATEID operations

   - Fix regression in /proc/fs/nfsd/v4_end_grace introduced in v6.5-rc"

* tag 'nfsd-6.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: Fix a thinko introduced by recent trace point changes
  nfsd: Fix race to FREE_STATEID and cl_revoked
2023-08-24 14:30:47 -07:00
Chuck Lever
8073a98e95 NFSD: Fix a thinko introduced by recent trace point changes
The fixed commit erroneously removed a call to nfsd_end_grace(),
which makes calls to write_v4_end_grace() a no-op.

Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202308241229.68396422-oliver.sang@intel.com
Fixes: 39d432fc76 ("NFSD: trace nfsctl operations")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-24 10:56:28 -04:00
Benjamin Coddington
3b816601e2 nfsd: Fix race to FREE_STATEID and cl_revoked
We have some reports of linux NFS clients that cannot satisfy a linux knfsd
server that always sets SEQ4_STATUS_RECALLABLE_STATE_REVOKED even though
those clients repeatedly walk all their known state using TEST_STATEID and
receive NFS4_OK for all.

Its possible for revoke_delegation() to set NFS4_REVOKED_DELEG_STID, then
nfsd4_free_stateid() finds the delegation and returns NFS4_OK to
FREE_STATEID.  Afterward, revoke_delegation() moves the same delegation to
cl_revoked.  This would produce the observed client/server effect.

Fix this by ensuring that the setting of sc_type to NFS4_REVOKED_DELEG_STID
and move to cl_revoked happens within the same cl_lock.  This will allow
nfsd4_free_stateid() to properly remove the delegation from cl_revoked.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=2217103
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2176575
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Cc: stable@vger.kernel.org # v4.17+
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-08-04 11:38:33 -04:00
Linus Torvalds
7bafbd4027 nfsd-6.5 fixes:
- Fix tmpfs splice read support
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmTLxS4ACgkQM2qzM29m
 f5cJOg//T/CR1IUGTxd6A4MYjN3J3nIgQwMIbNP1npaLZQp6rF1UlE4seCyMXWtG
 VxxR0TnCrxxCl7YbHz6jzQsel2lWpVpMh5+aWQ3jPeJqnrdfJX3VwLzKYEeVj8Uj
 use2i0g5UA3HTt3bULEgf17j7zCMqYqmldU5jLHvmkXyLN+E+WcHrhx6RmXH4lYN
 fR2bC8a6MmpyGJJ6P+mYw1GdOUIqWU/HQaeZC+L+T5xG156RqvZAQWsUR40kA3Ta
 6C4NQZr8CtbZcIzVIhxYDKYEg+R9iLRJeHoYVi/O0F779akzYcIuGHYMjG/Pi2z5
 IjxWJoGOi1L1bFYe4Nm06/0DLveNPfUjRybV4iCRY92TilyEhUlTjoHoGx5ajlsC
 02kvjyaJNJQ6oCvQmYH+PjHm5OW5Bj/BEl5O21MQUMXRklSNyW7HpGpWCUjpyVAJ
 by2YatGNCGoS8mLp3HebW9XjiuDEQ+Y/S4PgXaEaHDW/L5wmmoT1yR/iLl+1b/hV
 9jGhsyuowLQHLqIk3ZP7o2X8ApXh0ZD+Xmvvxobh47W/fYTCOe+SXySfpTX03EDV
 SBEel7d4aGESndB7DgWXMjP1D7xLwkMIpk4tJVw+7idVLgKlrJGfidY5ROIFJiIM
 95v+FKksLM3NTjt2Zb8MTfF65YKsRH3QqfgP34r5FzwAIx3t2VU=
 =Lq7u
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:

 - Fix tmpfs splice read support

* tag 'nfsd-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: Fix reading via splice
2023-08-03 09:26:34 -07:00
David Howells
101df45e7e nfsd: Fix reading via splice
nfsd_splice_actor() has a clause in its loop that chops up a compound page
into individual pages such that if the same page is seen twice in a row, it
is discarded the second time.  This is a problem with the advent of
shmem_splice_read() as that inserts zero_pages into the pipe in lieu of
pages that aren't present in the pagecache.

Fix this by assuming that the last page is being extended only if the
currently stored length + starting offset is not currently on a page
boundary.

This can be tested by NFS-exporting a tmpfs filesystem on the test machine
and truncating it to more than a page in size (eg. truncate -s 8192) and
then reading it by NFS.  The first page will be all zeros, but thereafter
garbage will be read.

Note: I wonder if we can ever get a situation now where we get a splice
that gives us contiguous parts of a page in separate actor calls.  As NFSD
can only be splicing from a file (I think), there are only three sources of
the page: copy_splice_read(), shmem_splice_read() and file_splice_read().
The first allocates pages for the data it reads, so the problem cannot
occur; the second should never see a partial page; and the third waits for
each page to become available before we're allowed to read from it.

Fixes: bd194b1871 ("shmem: Implement splice-read")
Reported-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: NeilBrown <neilb@suse.de>
cc: Hugh Dickins <hughd@google.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-nfs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-07-30 18:07:12 -04:00
Linus Torvalds
0b4a9fdc93 nfsd-6.5 fixes:
- Fix TEST_STATEID response
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmTALGMACgkQM2qzM29m
 f5eTLw//cyAYWF2VBP1byO5x3ssju9LUDn0fqXHPstdlqQIN/sG2A3pS2f59JPSx
 Vsa7wlsxRwHj9/tcDups7LBAelA/GopNTK5XuIDMLdhhKAgnJMqa5NCKR2cCC3It
 Xd+nkgigkeKMlQivBMZYBYtmFLNqAS0LkYBaEpWpyuBUtdayKUk+iMFaFwcfNn+E
 /VKaAjyWv1Ef2JpuwgCA3gpGHUnqel2MnTtbtSB09W2bFoPCQEusdpfq4XMzi+1S
 Rmv3tzt/B4/oQFlJnn8lOzSWYpT6Vol5kQcb2YM7d6asiqWZSYA78Iv0HekbhUZA
 dDEkowvix27v7wStwgfZCJofmc7u6mMaTRTLhMnF08zSLsqjmW1N+9o5WwXGngVm
 Y7x7eh5uhT56yN8exQLxiq2XItASrF/Z1XI0xqwrdn3+WtuOThw2DkhT2+ElErUk
 cuioHRHZ2LVLwCg5uJn3OrxtBYYxDLiCi3BPhB3I3J17Uyb6M/Tls0QV1FjLzwF3
 GyeeoJ7622ZNSOv/j4EuRk2tXWtewN65k4pcnpJbL+iQ2ejXFzls+Fe2m+tDLM+y
 jfTKMqO5Yb8jK7zn5Fmssfb32nwtJ7b7+SpDUHvyyttv8we/EKzbWA4/l8ECd5iT
 nClU7Pos9+WPaXjt1uawevgUNdm0Bhu54zyqgyeNWCYITq7DX1E=
 =z8O/
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:

 - Fix TEST_STATEID response

* tag 'nfsd-6.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: Remove incorrect check in nfsd4_validate_stateid
2023-07-25 13:54:04 -07:00
Jeff Layton
38d721b13f nfsd: convert to ctime accessor functions
In later patches, we're going to change how the inode's ctime field is
used. Switch to using accessor functions instead of raw accesses of
inode->i_ctime.

Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Message-Id: <20230705190309.579783-56-jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-07-24 10:30:01 +02:00
Trond Myklebust
f75546f58a nfsd: Remove incorrect check in nfsd4_validate_stateid
If the client is calling TEST_STATEID, then it is because some event
occurred that requires it to check all the stateids for validity and
call FREE_STATEID on the ones that have been revoked. In this case,
either the stateid exists in the list of stateids associated with that
nfs4_client, in which case it should be tested, or it does not. There
are no additional conditions to be considered.

Reported-by: "Frank Ch. Eigler" <fche@redhat.com>
Fixes: 7df302f75e ("NFSD: TEST_STATEID should not return NFS4ERR_STALE_STATEID")
Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-07-18 11:34:09 -04:00
Linus Torvalds
ee152be17a nfsd-6.5 fixes:
- Fix ordering of attributes in NFSv4 GETATTR replies
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmSfFEwACgkQM2qzM29m
 f5eHCw/8C3EAIsYGSe+aREUZgH7/m3JlElkrGA6IcKP6kKN9ZD7x0RIDxnkqcnbv
 73fmbgXrbu5NjjtvT9WHwS4yJPNKvU3xiVEMKJKelEdkboG4Qb76r951wzTkXK25
 ev/68BzYfbuX36Wa/21Gp/PmisqlspQjbk3X7zckCk8KM6PWvAO4HrmA7+VOkHMP
 tTVc3Bd482DqgCNmG7fz8UHeW97itkr8w4oFSgifuzQLC3h6f28yyxI9pQ0bFSn/
 fdcAOxx5W9crQ+lwIaHCzPZa8N+oGt0amqKXeqnyvY5FmH7Q3SjZ/9h07QRt7q4m
 sUb0peHpraOWB+rGMy6pcq4XxDEVhPsiJiM/hiHCtobZS18PEPn7Dd7ybC5GkUVC
 9H6hKSwvkubgsBzKZOmrO5trKCW4g3tSSnQ4olJbIA39neijtDsshi9UkZrbqm44
 54cg6DsTY/CzIYVzGqf9TRL18uf7yzYtadGwmM3fn03i+BDD8p7iS0VNinfekvJA
 PIL0DWpQLfU49fFKgTphe968fXbGA9aDgP2Lu379qYf7UdcpQ8N2t5BszsS2Sdkv
 U3wwNbhMNS3WZrlLXj+zgR+zJCEIo4YwPG23XSujFyrd0W46DbYvCpMSzOsKDM8B
 ZV6yiX4/G1Byr8GSffmKrmezXTGJS5BguiBi1D95o2pFMLw0eFo=
 =F59G
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:

 - Fix ordering of attributes in NFSv4 GETATTR replies

* tag 'nfsd-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: Fix creation time serialization order
2023-06-30 21:48:44 -07:00
Linus Torvalds
18c9901d74 \n
-----BEGIN PGP SIGNATURE-----
 
 iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAmScTY8ACgkQnJ2qBz9k
 QNnfwwgAhZtow1klDLH6qCnWMufB6AwT7VfAHyA3fvyTYMjUKb0sGHkpuh8hqVOb
 Lzb4YB+jSWV8XnMFn/4gFJQU/nAv8bMPavghMGpr5VNjQi7WkxYF/GB6O1I5NOHK
 EnJjDExgdxXDJZORaaXLVJWrtzJuDFgdiSeIwJECFa0MdTHNgPy3XOl+PPxnYQ/V
 xyHyP5ImGgd5O4iy3PFDQBGgOXIMrBX8IMce+qLQNYIvjSIUgmdnIkoUCvsQiisp
 LyKI2LxqAqnpA4h4Ow6hOZDw2VlPT0vDwFVUfFIZMIqs5YgaSbWa1Z6cs37MigAn
 fgUyRVx2y8A2Lwla7rwLaUEToRVADw==
 =ZdcG
 -----END PGP SIGNATURE-----

Merge tag 'fsnotify_for_v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull fsnotify updates from Jan Kara:

 - Support for fanotify events returning file handles for filesystems
   not exportable via NFS

 - Improved error handling exportfs functions

 - Add missing FS_OPEN events when unusual open helpers are used

* tag 'fsnotify_for_v6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fsnotify: move fsnotify_open() hook into do_dentry_open()
  exportfs: check for error return value from exportfs_encode_*()
  fanotify: support reporting non-decodeable file handles
  exportfs: allow exporting non-decodeable file handles to userspace
  exportfs: add explicit flag to request non-decodeable file handles
  exportfs: change connectable argument to bit flags
2023-06-29 13:31:44 -07:00
Linus Torvalds
3a8a670eee Networking changes for 6.5.
Core
 ----
 
  - Rework the sendpage & splice implementations. Instead of feeding
    data into sockets page by page extend sendmsg handlers to support
    taking a reference on the data, controlled by a new flag called
    MSG_SPLICE_PAGES. Rework the handling of unexpected-end-of-file
    to invoke an additional callback instead of trying to predict what
    the right combination of MORE/NOTLAST flags is.
    Remove the MSG_SENDPAGE_NOTLAST flag completely.
 
  - Implement SCM_PIDFD, a new type of CMSG type analogous to
    SCM_CREDENTIALS, but it contains pidfd instead of plain pid.
 
  - Enable socket busy polling with CONFIG_RT.
 
  - Improve reliability and efficiency of reporting for ref_tracker.
 
  - Auto-generate a user space C library for various Netlink families.
 
 Protocols
 ---------
 
  - Allow TCP to shrink the advertised window when necessary, prevent
    sk_rcvbuf auto-tuning from growing the window all the way up to
    tcp_rmem[2].
 
  - Use per-VMA locking for "page-flipping" TCP receive zerocopy.
 
  - Prepare TCP for device-to-device data transfers, by making sure
    that payloads are always attached to skbs as page frags.
 
  - Make the backoff time for the first N TCP SYN retransmissions
    linear. Exponential backoff is unnecessarily conservative.
 
  - Create a new MPTCP getsockopt to retrieve all info (MPTCP_FULL_INFO).
 
  - Avoid waking up applications using TLS sockets until we have
    a full record.
 
  - Allow using kernel memory for protocol ioctl callbacks, paving
    the way to issuing ioctls over io_uring.
 
  - Add nolocalbypass option to VxLAN, forcing packets to be fully
    encapsulated even if they are destined for a local IP address.
 
  - Make TCPv4 use consistent hash in TIME_WAIT and SYN_RECV. Ensure
    in-kernel ECMP implementation (e.g. Open vSwitch) select the same
    link for all packets. Support L4 symmetric hashing in Open vSwitch.
 
  - PPPoE: make number of hash bits configurable.
 
  - Allow DNS to be overwritten by DHCPACK in the in-kernel DHCP client
    (ipconfig).
 
  - Add layer 2 miss indication and filtering, allowing higher layers
    (e.g. ACL filters) to make forwarding decisions based on whether
    packet matched forwarding state in lower devices (bridge).
 
  - Support matching on Connectivity Fault Management (CFM) packets.
 
  - Hide the "link becomes ready" IPv6 messages by demoting their
    printk level to debug.
 
  - HSR: don't enable promiscuous mode if device offloads the proto.
 
  - Support active scanning in IEEE 802.15.4.
 
  - Continue work on Multi-Link Operation for WiFi 7.
 
 BPF
 ---
 
  - Add precision propagation for subprogs and callbacks. This allows
    maintaining verification efficiency when subprograms are used,
    or in fact passing the verifier at all for complex programs,
    especially those using open-coded iterators.
 
  - Improve BPF's {g,s}setsockopt() length handling. Previously BPF
    assumed the length is always equal to the amount of written data.
    But some protos allow passing a NULL buffer to discover what
    the output buffer *should* be, without writing anything.
 
  - Accept dynptr memory as memory arguments passed to helpers.
 
  - Add routing table ID to bpf_fib_lookup BPF helper.
 
  - Support O_PATH FDs in BPF_OBJ_PIN and BPF_OBJ_GET commands.
 
  - Drop bpf_capable() check in BPF_MAP_FREEZE command (used to mark
    maps as read-only).
 
  - Show target_{obj,btf}_id in tracing link fdinfo.
 
  - Addition of several new kfuncs (most of the names are self-explanatory):
    - Add a set of new dynptr kfuncs: bpf_dynptr_adjust(),
      bpf_dynptr_is_null(), bpf_dynptr_is_rdonly(), bpf_dynptr_size()
      and bpf_dynptr_clone().
    - bpf_task_under_cgroup()
    - bpf_sock_destroy() - force closing sockets
    - bpf_cpumask_first_and(), rework bpf_cpumask_any*() kfuncs
 
 Netfilter
 ---------
 
  - Relax set/map validation checks in nf_tables. Allow checking
    presence of an entry in a map without using the value.
 
  - Increase ip_vs_conn_tab_bits range for 64BIT builds.
 
  - Allow updating size of a set.
 
  - Improve NAT tuple selection when connection is closing.
 
 Driver API
 ----------
 
  - Integrate netdev with LED subsystem, to allow configuring HW
    "offloaded" blinking of LEDs based on link state and activity
    (i.e. packets coming in and out).
 
  - Support configuring rate selection pins of SFP modules.
 
  - Factor Clause 73 auto-negotiation code out of the drivers, provide
    common helper routines.
 
  - Add more fool-proof helpers for managing lifetime of MDIO devices
    associated with the PCS layer.
 
  - Allow drivers to report advanced statistics related to Time Aware
    scheduler offload (taprio).
 
  - Allow opting out of VF statistics in link dump, to allow more VFs
    to fit into the message.
 
  - Split devlink instance and devlink port operations.
 
 New hardware / drivers
 ----------------------
 
  - Ethernet:
    - Synopsys EMAC4 IP support (stmmac)
    - Marvell 88E6361 8 port (5x1GE + 3x2.5GE) switches
    - Marvell 88E6250 7 port switches
    - Microchip LAN8650/1 Rev.B0 PHYs
    - MediaTek MT7981/MT7988 built-in 1GE PHY driver
 
  - WiFi:
    - Realtek RTL8192FU, 2.4 GHz, b/g/n mode, 2T2R, 300 Mbps
    - Realtek RTL8723DS (SDIO variant)
    - Realtek RTL8851BE
 
  - CAN:
    - Fintek F81604
 
 Drivers
 -------
 
  - Ethernet NICs:
    - Intel (100G, ice):
      - support dynamic interrupt allocation
      - use meta data match instead of VF MAC addr on slow-path
    - nVidia/Mellanox:
      - extend link aggregation to handle 4, rather than just 2 ports
      - spawn sub-functions without any features by default
    - OcteonTX2:
      - support HTB (Tx scheduling/QoS) offload
      - make RSS hash generation configurable
      - support selecting Rx queue using TC filters
    - Wangxun (ngbe/txgbe):
      - add basic Tx/Rx packet offloads
      - add phylink support (SFP/PCS control)
    - Freescale/NXP (enetc):
      - report TAPRIO packet statistics
    - Solarflare/AMD:
      - support matching on IP ToS and UDP source port of outer header
      - VxLAN and GENEVE tunnel encapsulation over IPv4 or IPv6
      - add devlink dev info support for EF10
 
  - Virtual NICs:
    - Microsoft vNIC:
      - size the Rx indirection table based on requested configuration
      - support VLAN tagging
    - Amazon vNIC:
      - try to reuse Rx buffers if not fully consumed, useful for ARM
        servers running with 16kB pages
    - Google vNIC:
      - support TCP segmentation of >64kB frames
 
  - Ethernet embedded switches:
    - Marvell (mv88e6xxx):
      - enable USXGMII (88E6191X)
    - Microchip:
     - lan966x: add support for Egress Stage 0 ACL engine
     - lan966x: support mapping packet priority to internal switch
       priority (based on PCP or DSCP)
 
  - Ethernet PHYs:
    - Broadcom PHYs:
      - support for Wake-on-LAN for BCM54210E/B50212E
      - report LPI counter
    - Microsemi PHYs: support RGMII delay configuration (VSC85xx)
    - Micrel PHYs: receive timestamp in the frame (LAN8841)
    - Realtek PHYs: support optional external PHY clock
    - Altera TSE PCS: merge the driver into Lynx PCS which it is
      a variant of
 
  - CAN: Kvaser PCIEcan:
    - support packet timestamping
 
  - WiFi:
    - Intel (iwlwifi):
      - major update for new firmware and Multi-Link Operation (MLO)
      - configuration rework to drop test devices and split
        the different families
      - support for segmented PNVM images and power tables
      - new vendor entries for PPAG (platform antenna gain) feature
    - Qualcomm 802.11ax (ath11k):
      - Multiple Basic Service Set Identifier (MBSSID) and
        Enhanced MBSSID Advertisement (EMA) support in AP mode
      - support factory test mode
    - RealTek (rtw89):
      - add RSSI based antenna diversity
      - support U-NII-4 channels on 5 GHz band
    - RealTek (rtl8xxxu):
      - AP mode support for 8188f
      - support USB RX aggregation for the newer chips
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEE6jPA+I1ugmIBA4hXMUZtbf5SIrsFAmSbJM4ACgkQMUZtbf5S
 IrtoDhAAhEim1+LBIKf4lhPcVdZ2p/TkpnwTz5jsTwSeRBAxTwuNJ2fQhFXg13E3
 MnRq6QaEp8G4/tA/gynLvQop+FEZEnv+horP0zf/XLcC8euU7UrKdrpt/4xxdP07
 IL/fFWsoUGNO+L9LNaHwBo8g7nHvOkPscHEBHc2Xrvzab56TJk6vPySfLqcpKlNZ
 CHWDwTpgRqNZzSKiSpoMVd9OVMKUXcPYHpDmfEJ5l+e8vTXmZzOLHrSELHU5nP5f
 mHV7gxkDCTshoGcaed7UTiOvgu1p6E5EchDJxiLaSUbgsd8SZ3u4oXwRxgj33RK/
 fB2+UaLrRt/DdlHvT/Ph8e8Ygu77yIXMjT49jsfur/zVA0HEA2dFb7V6QlsYRmQp
 J25pnrdXmE15llgqsC0/UOW5J1laTjII+T2T70UOAqQl4LWYAQDG4WwsAqTzU0KY
 dueydDouTp9XC2WYrRUEQxJUzxaOaazskDUHc5c8oHp/zVBT+djdgtvVR9+gi6+7
 yy4elI77FlEEqL0ItdU/lSWINayAlPLsIHkMyhSGKX0XDpKjeycPqkNx4UterXB/
 JKIR5RBWllRft+igIngIkKX0tJGMU0whngiw7d1WLw25wgu4sB53hiWWoSba14hv
 tXMxwZs5iGaPcT38oRVMZz8I1kJM4Dz3SyI7twVvi4RUut64EG4=
 =9i4I
 -----END PGP SIGNATURE-----

Merge tag 'net-next-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking changes from Jakub Kicinski:
 "WiFi 7 and sendpage changes are the biggest pieces of work for this
  release. The latter will definitely require fixes but I think that we
  got it to a reasonable point.

  Core:

   - Rework the sendpage & splice implementations

     Instead of feeding data into sockets page by page extend sendmsg
     handlers to support taking a reference on the data, controlled by a
     new flag called MSG_SPLICE_PAGES

     Rework the handling of unexpected-end-of-file to invoke an
     additional callback instead of trying to predict what the right
     combination of MORE/NOTLAST flags is

     Remove the MSG_SENDPAGE_NOTLAST flag completely

   - Implement SCM_PIDFD, a new type of CMSG type analogous to
     SCM_CREDENTIALS, but it contains pidfd instead of plain pid

   - Enable socket busy polling with CONFIG_RT

   - Improve reliability and efficiency of reporting for ref_tracker

   - Auto-generate a user space C library for various Netlink families

  Protocols:

   - Allow TCP to shrink the advertised window when necessary, prevent
     sk_rcvbuf auto-tuning from growing the window all the way up to
     tcp_rmem[2]

   - Use per-VMA locking for "page-flipping" TCP receive zerocopy

   - Prepare TCP for device-to-device data transfers, by making sure
     that payloads are always attached to skbs as page frags

   - Make the backoff time for the first N TCP SYN retransmissions
     linear. Exponential backoff is unnecessarily conservative

   - Create a new MPTCP getsockopt to retrieve all info
     (MPTCP_FULL_INFO)

   - Avoid waking up applications using TLS sockets until we have a full
     record

   - Allow using kernel memory for protocol ioctl callbacks, paving the
     way to issuing ioctls over io_uring

   - Add nolocalbypass option to VxLAN, forcing packets to be fully
     encapsulated even if they are destined for a local IP address

   - Make TCPv4 use consistent hash in TIME_WAIT and SYN_RECV. Ensure
     in-kernel ECMP implementation (e.g. Open vSwitch) select the same
     link for all packets. Support L4 symmetric hashing in Open vSwitch

   - PPPoE: make number of hash bits configurable

   - Allow DNS to be overwritten by DHCPACK in the in-kernel DHCP client
     (ipconfig)

   - Add layer 2 miss indication and filtering, allowing higher layers
     (e.g. ACL filters) to make forwarding decisions based on whether
     packet matched forwarding state in lower devices (bridge)

   - Support matching on Connectivity Fault Management (CFM) packets

   - Hide the "link becomes ready" IPv6 messages by demoting their
     printk level to debug

   - HSR: don't enable promiscuous mode if device offloads the proto

   - Support active scanning in IEEE 802.15.4

   - Continue work on Multi-Link Operation for WiFi 7

  BPF:

   - Add precision propagation for subprogs and callbacks. This allows
     maintaining verification efficiency when subprograms are used, or
     in fact passing the verifier at all for complex programs,
     especially those using open-coded iterators

   - Improve BPF's {g,s}setsockopt() length handling. Previously BPF
     assumed the length is always equal to the amount of written data.
     But some protos allow passing a NULL buffer to discover what the
     output buffer *should* be, without writing anything

   - Accept dynptr memory as memory arguments passed to helpers

   - Add routing table ID to bpf_fib_lookup BPF helper

   - Support O_PATH FDs in BPF_OBJ_PIN and BPF_OBJ_GET commands

   - Drop bpf_capable() check in BPF_MAP_FREEZE command (used to mark
     maps as read-only)

   - Show target_{obj,btf}_id in tracing link fdinfo

   - Addition of several new kfuncs (most of the names are
     self-explanatory):
      - Add a set of new dynptr kfuncs: bpf_dynptr_adjust(),
        bpf_dynptr_is_null(), bpf_dynptr_is_rdonly(), bpf_dynptr_size()
        and bpf_dynptr_clone().
      - bpf_task_under_cgroup()
      - bpf_sock_destroy() - force closing sockets
      - bpf_cpumask_first_and(), rework bpf_cpumask_any*() kfuncs

  Netfilter:

   - Relax set/map validation checks in nf_tables. Allow checking
     presence of an entry in a map without using the value

   - Increase ip_vs_conn_tab_bits range for 64BIT builds

   - Allow updating size of a set

   - Improve NAT tuple selection when connection is closing

  Driver API:

   - Integrate netdev with LED subsystem, to allow configuring HW
     "offloaded" blinking of LEDs based on link state and activity
     (i.e. packets coming in and out)

   - Support configuring rate selection pins of SFP modules

   - Factor Clause 73 auto-negotiation code out of the drivers, provide
     common helper routines

   - Add more fool-proof helpers for managing lifetime of MDIO devices
     associated with the PCS layer

   - Allow drivers to report advanced statistics related to Time Aware
     scheduler offload (taprio)

   - Allow opting out of VF statistics in link dump, to allow more VFs
     to fit into the message

   - Split devlink instance and devlink port operations

  New hardware / drivers:

   - Ethernet:
      - Synopsys EMAC4 IP support (stmmac)
      - Marvell 88E6361 8 port (5x1GE + 3x2.5GE) switches
      - Marvell 88E6250 7 port switches
      - Microchip LAN8650/1 Rev.B0 PHYs
      - MediaTek MT7981/MT7988 built-in 1GE PHY driver

   - WiFi:
      - Realtek RTL8192FU, 2.4 GHz, b/g/n mode, 2T2R, 300 Mbps
      - Realtek RTL8723DS (SDIO variant)
      - Realtek RTL8851BE

   - CAN:
      - Fintek F81604

  Drivers:

   - Ethernet NICs:
      - Intel (100G, ice):
         - support dynamic interrupt allocation
         - use meta data match instead of VF MAC addr on slow-path
      - nVidia/Mellanox:
         - extend link aggregation to handle 4, rather than just 2 ports
         - spawn sub-functions without any features by default
      - OcteonTX2:
         - support HTB (Tx scheduling/QoS) offload
         - make RSS hash generation configurable
         - support selecting Rx queue using TC filters
      - Wangxun (ngbe/txgbe):
         - add basic Tx/Rx packet offloads
         - add phylink support (SFP/PCS control)
      - Freescale/NXP (enetc):
         - report TAPRIO packet statistics
      - Solarflare/AMD:
         - support matching on IP ToS and UDP source port of outer
           header
         - VxLAN and GENEVE tunnel encapsulation over IPv4 or IPv6
         - add devlink dev info support for EF10

   - Virtual NICs:
      - Microsoft vNIC:
         - size the Rx indirection table based on requested
           configuration
         - support VLAN tagging
      - Amazon vNIC:
         - try to reuse Rx buffers if not fully consumed, useful for ARM
           servers running with 16kB pages
      - Google vNIC:
         - support TCP segmentation of >64kB frames

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - enable USXGMII (88E6191X)
      - Microchip:
         - lan966x: add support for Egress Stage 0 ACL engine
         - lan966x: support mapping packet priority to internal switch
           priority (based on PCP or DSCP)

   - Ethernet PHYs:
      - Broadcom PHYs:
         - support for Wake-on-LAN for BCM54210E/B50212E
         - report LPI counter
      - Microsemi PHYs: support RGMII delay configuration (VSC85xx)
      - Micrel PHYs: receive timestamp in the frame (LAN8841)
      - Realtek PHYs: support optional external PHY clock
      - Altera TSE PCS: merge the driver into Lynx PCS which it is a
        variant of

   - CAN: Kvaser PCIEcan:
      - support packet timestamping

   - WiFi:
      - Intel (iwlwifi):
         - major update for new firmware and Multi-Link Operation (MLO)
         - configuration rework to drop test devices and split the
           different families
         - support for segmented PNVM images and power tables
         - new vendor entries for PPAG (platform antenna gain) feature
      - Qualcomm 802.11ax (ath11k):
         - Multiple Basic Service Set Identifier (MBSSID) and Enhanced
           MBSSID Advertisement (EMA) support in AP mode
         - support factory test mode
      - RealTek (rtw89):
         - add RSSI based antenna diversity
         - support U-NII-4 channels on 5 GHz band
      - RealTek (rtl8xxxu):
         - AP mode support for 8188f
         - support USB RX aggregation for the newer chips"

* tag 'net-next-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1602 commits)
  net: scm: introduce and use scm_recv_unix helper
  af_unix: Skip SCM_PIDFD if scm->pid is NULL.
  net: lan743x: Simplify comparison
  netlink: Add __sock_i_ino() for __netlink_diag_dump().
  net: dsa: avoid suspicious RCU usage for synced VLAN-aware MAC addresses
  Revert "af_unix: Call scm_recv() only after scm_set_cred()."
  phylink: ReST-ify the phylink_pcs_neg_mode() kdoc
  libceph: Partially revert changes to support MSG_SPLICE_PAGES
  net: phy: mscc: fix packet loss due to RGMII delays
  net: mana: use vmalloc_array and vcalloc
  net: enetc: use vmalloc_array and vcalloc
  ionic: use vmalloc_array and vcalloc
  pds_core: use vmalloc_array and vcalloc
  gve: use vmalloc_array and vcalloc
  octeon_ep: use vmalloc_array and vcalloc
  net: usb: qmi_wwan: add u-blox 0x1312 composition
  perf trace: fix MSG_SPLICE_PAGES build error
  ipvlan: Fix return value of ipvlan_queue_xmit()
  netfilter: nf_tables: fix underflow in chain reference counter
  netfilter: nf_tables: unbind non-anonymous set if rule construction fails
  ...
2023-06-28 16:43:10 -07:00
Tavian Barnes
d7dbed457c nfsd: Fix creation time serialization order
In nfsd4_encode_fattr(), TIME_CREATE was being written out after all
other times.  However, they should be written out in an order that
matches the bit flags in bmval1, which in this case are

    #define FATTR4_WORD1_TIME_ACCESS        (1UL << 15)
    #define FATTR4_WORD1_TIME_CREATE        (1UL << 18)
    #define FATTR4_WORD1_TIME_DELTA         (1UL << 19)
    #define FATTR4_WORD1_TIME_METADATA      (1UL << 20)
    #define FATTR4_WORD1_TIME_MODIFY        (1UL << 21)

so TIME_CREATE should come second.

I noticed this on a FreeBSD NFSv4.2 client, which supports creation
times.  On this client, file times were weirdly permuted.  With this
patch applied on the server, times looked normal on the client.

Fixes: e377a3e698 ("nfsd: Add support for the birth time attribute")
Link: https://unix.stackexchange.com/q/749605/56202
Signed-off-by: Tavian Barnes <tavianator@tavianator.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-27 12:10:47 -04:00
David Howells
dc97391e66 sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)
Remove ->sendpage() and ->sendpage_locked().  sendmsg() with
MSG_SPLICE_PAGES should be used instead.  This allows multiple pages and
multipage folios to be passed through.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for net/can
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-afs@lists.infradead.org
cc: mptcp@lists.linux.dev
cc: rds-devel@oss.oracle.com
cc: tipc-discussion@lists.sourceforge.net
cc: virtualization@lists.linux-foundation.org
Link: https://lore.kernel.org/r/20230623225513.2732256-16-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-06-24 15:50:13 -07:00
Colin Ian King
75bfb70457 nfsd: remove redundant assignments to variable len
There are a few assignments to variable len where the value is not
being read and so the assignments are redundant and can be removed.
In one case, the variable len can be removed completely. Cleans up
4 clang scan warnings of the form:

fs/nfsd/export.c💯7: warning: Although the value stored to 'len'
is used in the enclosing expression, the value is never actually
read from 'len' [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-21 15:05:32 -04:00
Chuck Lever
5e092be741 NFSD: Distinguish per-net namespace initialization
I find the naming of nfsd_init_net() and nfsd_startup_net() to be
confusingly similar. Rename the namespace initialization and tear-
down ops and add comments to distinguish their separate purposes.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-18 12:02:52 -04:00
Jeff Layton
ed9ab7346e nfsd: move init of percpu reply_cache_stats counters back to nfsd_init_net
Commit f5f9d4a314 ("nfsd: move reply cache initialization into nfsd
startup") moved the initialization of the reply cache into nfsd startup,
but didn't account for the stats counters, which can be accessed before
nfsd is ever started. The result can be a NULL pointer dereference when
someone accesses /proc/fs/nfsd/reply_cache_stats while nfsd is still
shut down.

This is a regression and a user-triggerable oops in the right situation:

- non-x86_64 arch
- /proc/fs/nfsd is mounted in the namespace
- nfsd is not started in the namespace
- unprivileged user calls "cat /proc/fs/nfsd/reply_cache_stats"

Although this is easy to trigger on some arches (like aarch64), on
x86_64, calling this_cpu_ptr(NULL) evidently returns a pointer to the
fixed_percpu_data. That struct looks just enough like a newly
initialized percpu var to allow nfsd_reply_cache_stats_show to access
it without Oopsing.

Move the initialization of the per-net+per-cpu reply-cache counters
back into nfsd_init_net, while leaving the rest of the reply cache
allocations to be done at nfsd startup time.

Kudos to Eirik who did most of the legwork to track this down.

Cc: stable@vger.kernel.org # v6.3+
Fixes: f5f9d4a314 ("nfsd: move reply cache initialization into nfsd startup")
Reported-and-tested-by: Eirik Fuller <efuller@redhat.com>
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2215429
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-18 12:02:40 -04:00
Chuck Lever
262176798b NFSD: Add an nfsd4_encode_nfstime4() helper
Clean up: de-duplicate some common code.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-17 13:18:06 -04:00
Dai Ngo
58f5d89400 NFSD: add encoding of op_recall flag for write delegation
Modified nfsd4_encode_open to encode the op_recall flag properly
for OPEN result with write delegation granted.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@vger.kernel.org
2023-06-12 12:16:35 -04:00
Jeff Layton
518f375c15 nfsd: don't provide pre/post-op attrs if fh_getattr fails
nfsd calls fh_getattr to get the latest inode attrs for pre/post-op
info. In the event that fh_getattr fails, it resorts to scraping cached
values out of the inode directly.

Since these attributes are optional, we can just skip providing them
altogether when this happens.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Neil Brown <neilb@suse.de>
2023-06-11 16:37:46 -04:00
Chuck Lever
df56b384de NFSD: Remove nfsd_readv()
nfsd_readv()'s consumers now use nfsd_iter_read().

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-11 16:37:46 -04:00
Chuck Lever
703d752155 NFSD: Hoist rq_vec preparation into nfsd_read() [step two]
Now that the preparation of an rq_vec has been removed from the
generic read path, nfsd_splice_read() no longer needs to reset
rq_next_page.

nfsd4_encode_read() calls nfsd_splice_read() directly. As far as I
can ascertain, resetting rq_next_page for NFSv4 splice reads is
unnecessary because rq_next_page is already set correctly.

Moreover, resetting it might even be incorrect if previous
operations in the COMPOUND have already consumed at least a page of
the send buffer. I would expect that the result would be encoding
the READ payload over previously-encoded results.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-11 16:37:46 -04:00
Chuck Lever
507df40ebf NFSD: Hoist rq_vec preparation into nfsd_read()
Accrue the following benefits:

a) Deduplicate this common bit of code.

b) Don't prepare rq_vec for NFSv2 and NFSv3 spliced reads, which
   don't use rq_vec. This is already the case for
   nfsd4_encode_read().

c) Eventually, converting NFSD's read path to use a bvec iterator
   will be simpler.

In the next patch, nfsd_iter_read() will replace nfsd_readv() for
all NFS versions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-11 16:37:45 -04:00
Chuck Lever
ed4a567a17 NFSD: Update rq_next_page between COMPOUND operations
A GETATTR with a large result can advance xdr->page_ptr without
updating rq_next_page. If a splice READ follows that GETATTR in the
COMPOUND, nfsd_splice_actor can start splicing at the wrong page.

I've also seen READLINK and READDIR leave rq_next_page in an
unmodified state.

There are potentially a myriad of combinations like this, so play it
safe: move the rq_next_page update to nfsd4_encode_operation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-11 16:37:45 -04:00
Chuck Lever
ba21e20b30 NFSD: Use svcxdr_encode_opaque_pages() in nfsd4_encode_splice_read()
Commit 15b23ef5d3 ("nfsd4: fix corruption of NFSv4 read data")
encountered exactly the same issue: after a splice read, a
filesystem-owned page is left in rq_pages[]; the symptoms are the
same as described there.

If the computed number of pages in nfsd4_encode_splice_read() is not
exactly the same as the actual number of pages that were consumed by
nfsd_splice_actor() (say, because of a bug) then hilarity ensues.

Instead of recomputing the page offset based on the size of the
payload, use rq_next_page, which is already properly updated by
nfsd_splice_actor(), to cause svc_rqst_release_pages() to operate
correctly in every instance.

This is a defensive change since we believe that after commit
27c934dd88 ("nfsd: don't replace page in rq_pages if it's a
continuation of last page") has been applied, there are no known
opportunities for nfsd_splice_actor() to screw up. So I'm not
marking it for stable backport.

Reported-by: Andy Zlotek <andy.zlotek@oracle.com>
Suggested-by: Calum Mackay <calum.mackay@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-11 16:37:40 -04:00
Chuck Lever
82078b9895 NFSD: Ensure that xdr_write_pages updates rq_next_page
All other NFSv[23] procedures manage to keep page_ptr and
rq_next_page in lock step.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:44 -04:00
Chuck Lever
66a21db7db NFSD: Replace encode_cinfo()
De-duplicate "reserve_space; encode_cinfo".

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:44 -04:00
Chuck Lever
adaa7a50d0 NFSD: Add encoders for NFSv4 clientids and verifiers
Deduplicate some common code.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:44 -04:00
Chuck Lever
39d432fc76 NFSD: trace nfsctl operations
Add trace log eye-catchers that record the arguments used to
configure NFSD. This helps when troubleshooting the NFSD
administrative interfaces.

These tracepoints can capture NFSD start-up and shutdown times and
parameters, changes in lease time and thread count, and a request
to end the namespace's NFSv4 grace period, in addition to the set
of NFS versions that are enabled.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:43 -04:00
Chuck Lever
3434d7aa77 NFSD: Clean up nfsctl_transaction_write()
For easier readability, follow the common convention:

    if (error)
	handle_error;
    continue_normally;

No behavior change is expected.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:42 -04:00
Chuck Lever
442a629009 NFSD: Clean up nfsctl white-space damage
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:42 -04:00
Christian Brauner
2d8ae8c417 nfsd: use vfs setgid helper
We've aligned setgid behavior over multiple kernel releases. The details
can be found in commit cf619f8919 ("Merge tag 'fs.ovl.setgid.v6.2' of
git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping") and
commit 426b4ca2d6 ("Merge tag 'fs.setgid.v6.0' of
git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux").
Consistent setgid stripping behavior is now encapsulated in the
setattr_should_drop_sgid() helper which is used by all filesystems that
strip setgid bits outside of vfs proper. Usually ATTR_KILL_SGID is
raised in e.g., chown_common() and is subject to the
setattr_should_drop_sgid() check to determine whether the setgid bit can
be retained. Since nfsd is raising ATTR_KILL_SGID unconditionally it
will cause notify_change() to strip it even if the caller had the
necessary privileges to retain it. Ensure that nfsd only raises
ATR_KILL_SGID if the caller lacks the necessary privileges to retain the
setgid bit.

Without this patch the setgid stripping tests in LTP will fail:

> As you can see, the problem is S_ISGID (0002000) was dropped on a
> non-group-executable file while chown was invoked by super-user, while

[...]

> fchown02.c:66: TFAIL: testfile2: wrong mode permissions 0100700, expected 0102700

[...]

> chown02.c:57: TFAIL: testfile2: wrong mode permissions 0100700, expected 0102700

With this patch all tests pass.

Reported-by: Sherry Yang <sherry.yang@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-06-05 09:01:41 -04:00
Linus Torvalds
a746ca666a nfsd-6.4 fixes:
- Two minor bug fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmR3f/AACgkQM2qzM29m
 f5dgCQ/+KiS7B1u8O8VrsAy3D2G309UZUf2QMr982pDimaXBR65ggKI5GWTjjwrW
 ob0P18prMetT6SGUAIJ3nlEsjDfs+CgKPq/zE2uqB0Sgv4ROmWoboygVsCk+JiTp
 xlystF9XBMSjqu23LazFE6+yTAMWcX7ddB5NrJCZr+yMffVZhN6onM38YtQNKh1F
 fdY+tY7NgEu24+60Heb8ZAmo2+mX8fSe+lVXuwV3h1HRKand1463NNSMGH0t805P
 nBdytIBuwWbOHv8mgL3FB042PSGiHsaL5Yevq42Je+7nN92olHS0ML2IBgcwzHsw
 Duc8E8MvElUIADXIfOg5SODjUJ8C5Avclyj7tbcnc9H5jdvolWshbJa8CkhTkvC2
 mdVTxDlOpWlBK4fLEtEJQzHldppGZqmnS85ppl4Ipjdu6s6WGyFs6kKXAyKGnsvc
 ydNFyhqv88BY6H3S681nLdTdwMFpxa8RAyJqXkcOBmbJd/8naDpDq7bi6GxNUvWs
 36ymLklJzWxKP/B0tayvqA+dTiKbs/480Xz37vXrcJigBeWpwyNQG2NUeGeqP2kd
 xvEiCZHYq0gmTjGKnxeyvzAeKAlzRKSo4BiI5tUYBOBhV0OHIozz7TMa+Br91sEl
 fNrjnr/d8XAxAVmJcWuSlqfggOVFS1D8FxYIhcbY1NV6zPWogu0=
 =2AMA
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Two minor bug fixes

* tag 'nfsd-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: fix double fget() bug in __write_ports_addfd()
  nfsd: make a copy of struct iattr before calling notify_change
2023-06-02 13:38:55 -04:00
Dan Carpenter
c034203b6a nfsd: fix double fget() bug in __write_ports_addfd()
The bug here is that you cannot rely on getting the same socket
from multiple calls to fget() because userspace can influence
that.  This is a kind of double fetch bug.

The fix is to delete the svc_alien_sock() function and instead do
the checking inside the svc_addsock() function.

Fixes: 3064639423 ("nfsd: check passed socket's net matches NFSd superblock's one")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: NeilBrown <neilb@suse.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-05-31 09:57:14 -04:00
Amir Goldstein
7cdafe6cc4 exportfs: check for error return value from exportfs_encode_*()
The exportfs_encode_*() helpers call the filesystem ->encode_fh()
method which returns a signed int.

All the in-tree implementations of ->encode_fh() return a positive
integer and FILEID_INVALID (255) for error.

Fortify the callers for possible future ->encode_fh() implementation
that will return a negative error value.

name_to_handle_at() would propagate the returned error to the users
if filesystem ->encode_fh() method returns an error.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/linux-fsdevel/ca02955f-1877-4fde-b453-3c1d22794740@kili.mountain/
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230524154825.881414-1-amir73il@gmail.com>
2023-05-25 13:17:04 +02:00
Jeff Layton
d53d70084d nfsd: make a copy of struct iattr before calling notify_change
notify_change can modify the iattr structure. In particular it can
end up setting ATTR_MODE when ATTR_KILL_SUID is already set, causing
a BUG() if the same iattr is passed to notify_change more than once.

Make a copy of the struct iattr before calling notify_change.

Reported-by: Zhi Li <yieli@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2207969
Tested-by: Zhi Li <yieli@redhat.com>
Fixes: 34b91dda71 ("NFSD: Make nfsd4_setattr() wait before returning NFS4ERR_DELAY")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-05-23 09:46:26 -04:00
Amir Goldstein
b52878275c exportfs: change connectable argument to bit flags
Convert the bool connectable arguemnt into a bit flags argument and
define the EXPORT_FS_CONNECTABLE flag as a requested property of the
file handle.

We are going to add a flag for requesting non-decodeable file handles.

Acked-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230502124817.3070545-2-amir73il@gmail.com>
2023-05-22 18:08:37 +02:00
Linus Torvalds
1b66c114d1 nfsd-6.4 fixes:
- A collection of minor bug fixes
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmRiQVEACgkQM2qzM29m
 f5eYfBAAg5Qz45PL+fo1qWxkJ1ZKaNV1vPdi4tqCt9NEItDTjAnjj0am+rKNGZAz
 EOM2yFt4xaZGyMYgXe4VnYl0N+rSpbI/H+Rk/wOq4OHPURQD5EO9VeP86qZ7rmGl
 ECPqb39TFTwAiRomC/DHO4eNpoe1rQuXu0tW9+GmqDGxeuh8xdxTk33g17ZXwCFN
 tdPkkPjxVPdWd8X7HQg9kWm8AWfV+GyuzE2rKAoOjbs6Wv6d9GCY8Cb5HXkRsQhF
 4Zh0PVQuTuXurZwtPXwnS0k4kfvQwjlTIKHlXuo0ZLh+SuFbrWHzv0fVyD+kUpSK
 HtWbJ8JcruUvz0WGMtZatzRLHCZLDguV6oVXPp7rtmuxTj4szzHSFpEeAV901sIm
 Nkvuomvd02K/fiTo7s3yr6t1VG2vju9LDwhBe197iA3leHAlockfbbxE3NJMGbzQ
 NoOPd+lu95cfsanOM1LZZLNfbLrZofoSLK9K1+HD0yAVdyq7u47FyHRrymvCaMrj
 GiheuqrBfBMEq+2mCwUn37aM0FblYEXQM0xTVXPQcHtBBN/nGZxPJukmpr7ScNlR
 aqMtDoOLu4OEFuo6fe2/94eNi+N5XAZgWmx/mSyaytE8Xw9LJxeQ83UTigaGcYKc
 3YIuG1YXg9IyIoIdLkghB+Aj/6fivsGFK9Gud6g7I3xw4f15noA=
 =PiNG
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - A collection of minor bug fixes

* tag 'nfsd-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: Remove open coding of string copy
  SUNRPC: Fix trace_svc_register() call site
  SUNRPC: always free ctxt when freeing deferred request
  SUNRPC: double free xprt_ctxt while still in use
  SUNRPC: Fix error handling in svc_setup_socket()
  SUNRPC: Fix encoding of accepted but unsuccessful RPC replies
  lockd: define nlm_port_min,max with CONFIG_SYSCTL
  nfsd: define exports_proc_ops with CONFIG_PROC_FS
  SUNRPC: Avoid relying on crypto API to derive CBC-CTS output IV
2023-05-17 09:56:01 -07:00
Azeem Shaikh
21a3f33289 NFSD: Remove open coding of string copy
Instead of open coding a __dynamic_array(), use the __string() and
__assign_str() helper macros that exist for this kind of use case.

Part of an effort to remove deprecated strlcpy() [1] completely from the
kernel[2].

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Fixes: 3c92fba557 ("NFSD: Enhance the nfsd_cb_setup tracepoint")
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-05-15 08:03:04 -04:00
Tom Rix
340086da9a nfsd: define exports_proc_ops with CONFIG_PROC_FS
gcc with W=1 and ! CONFIG_PROC_FS
fs/nfsd/nfsctl.c:161:30: error: ‘exports_proc_ops’
  defined but not used [-Werror=unused-const-variable=]
  161 | static const struct proc_ops exports_proc_ops = {
      |                              ^~~~~~~~~~~~~~~~

The only use of exports_proc_ops is when CONFIG_PROC_FS
is defined, so its definition should be likewise conditional.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-05-02 15:46:54 -04:00
Linus Torvalds
4e1c80ae5c NFSD 6.4 Release Notes
The big ticket item for this release is support for RPC-with-TLS
 [RFC 9289] has been added to the Linux NFS server. The goal is to
 provide a simple-to-deploy, low-overhead in-transit confidentiality
 and peer authentication mechanism. It can supplement NFS Kerberos
 and it can protect the use of legacy non-cryptographic user
 authentication flavors such as AUTH_SYS. The TLS Record protocol is
 handled entirely by kTLS, meaning it can use either software
 encryption or offload encryption to smart NICs.
 
 Work continues on improving NFSD's open file cache. Among the many
 clean-ups in that area is a patch to convert the rhashtable to use
 the list-hashing version of that data structure.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmRK/JMACgkQM2qzM29m
 f5cF5A/+JZFRSPlfSYt0YHzUQQSDdYn5n/IG9TwJQd62xheu083WuKRaCOYYoOhg
 06nZd6p7nuF1E0n2ZWOKSE6YkBSE6z4M6KrQlm6lCe/nmxYCR87IYfJCXuL+Yf0e
 /LdL4OTvDHzY5ec1DreERldPIUJ8GFzwChH8/z4XwbNDR7qJkF/gf8YxpFr+8K+j
 Cfyl8woZiEze/Nvxy1YtAqa7HMEpitt0aWJN55rHwTh9c3b0nmDzziYFcVqXgybJ
 /qUHfHBak66ll8RqhcQ3BMuyfszwASERbPsaZ2a5F/RaxLL5ZWfFyhgQwm+PZWT+
 J5DdSBwLEQYtKQGD41A1aorP6v/u2QelfWrl4S7/qjRpREp8Ba2IU4fYLjGb1499
 Imk68BA7NwFp87tdMi/7en1VVgina4U/S3X71aUYWe+C0g48BfTrVwq4SVbQSAo4
 1638vbZnrJbsJMr9OaaysKWfv4KZB020Ji1KVwuqmgy5F8kdfJCCQ2UR/fHuJ3DY
 R0Zrd1Ryjwr83viP+Xj0ERiW405gPdCT0RJqoA7rznRPCqT5M42tf5z65uO7iZeE
 C1udgDaoQOtioKlem6FcDXLkryf986slGA7V91lat/Jt8A5jLKQfjVe3Q+kaaqXP
 ka1DQnYelzMzILQQs39cqW5pShrH8e3tfRZ7JhdBgrpxVXz9ZZM=
 =lA2+
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:
 "The big ticket item for this release is that support for RPC-with-TLS
  [RFC 9289] has been added to the Linux NFS server.

  The goal is to provide a simple-to-deploy, low-overhead in-transit
  confidentiality and peer authentication mechanism. It can supplement
  NFS Kerberos and it can protect the use of legacy non-cryptographic
  user authentication flavors such as AUTH_SYS. The TLS Record protocol
  is handled entirely by kTLS, meaning it can use either software
  encryption or offload encryption to smart NICs.

  Aside from that, work continues on improving NFSD's open file cache.
  Among the many clean-ups in that area is a patch to convert the
  rhashtable to use the list-hashing version of that data structure"

* tag 'nfsd-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (31 commits)
  NFSD: Handle new xprtsec= export option
  SUNRPC: Support TLS handshake in the server-side TCP socket code
  NFSD: Clean up xattr memory allocation flags
  NFSD: Fix problem of COMMIT and NFS4ERR_DELAY in infinite loop
  SUNRPC: Clear rq_xid when receiving a new RPC Call
  SUNRPC: Recognize control messages in server-side TCP socket code
  SUNRPC: Be even lazier about releasing pages
  SUNRPC: Convert svc_xprt_release() to the release_pages() API
  SUNRPC: Relocate svc_free_res_pages()
  nfsd: simplify the delayed disposal list code
  SUNRPC: Ignore return value of ->xpo_sendto
  SUNRPC: Ensure server-side sockets have a sock->file
  NFSD: Watch for rq_pages bounds checking errors in nfsd_splice_actor()
  sunrpc: simplify two-level sysctl registration for svcrdma_parm_table
  SUNRPC: return proper error from get_expiry()
  lockd: add some client-side tracepoints
  nfs: move nfs_fhandle_hash to common include file
  lockd: server should unlock lock if client rejects the grant
  lockd: fix races in client GRANTED_MSG wait logic
  lockd: move struct nlm_wait to lockd.h
  ...
2023-04-29 11:04:14 -07:00
Chuck Lever
9280c57743 NFSD: Handle new xprtsec= export option
Enable administrators to require clients to use transport layer
security when accessing particular exports.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-27 18:49:24 -04:00
Chuck Lever
22b620ec0b NFSD: Clean up xattr memory allocation flags
Tetsuo Handa points out:
> Since GFP_KERNEL is "GFP_NOFS | __GFP_FS", usage like
> "GFP_KERNEL | GFP_NOFS" does not make sense.

The original intent was to hold the inode lock while estimating
the buffer requirements for the requested information. Frank van
der Linden, the author of NFSD's xattr code, says:

> ... you need inode_lock to get an atomic view of an xattr. Since
> both nfsd_getxattr and nfsd_listxattr to the standard trick of
> querying the xattr length with a NULL buf argument (just getting
> the length back), allocating the right buffer size, and then
> querying again, they need to hold the inode lock to avoid having
> the xattr changed from under them while doing that.
>
> From that then flows the requirement that GFP_FS could cause
> problems while holding i_rwsem, so I added GFP_NOFS.

However, Dave Chinner states:
> You can do GFP_KERNEL allocations holding the i_rwsem just fine.
> All that it requires is the caller holds a reference to the
> inode ...

Since these code paths acquire a dentry, they do indeed hold a
reference. It is therefore safe to use GFP_KERNEL for these memory
allocations. In particular, that's what this code is already doing;
but now the C source code looks sane too.

At a later time we can revisit in order to remove the inode lock in
favor of simply retrying if the estimated buffer size is too small.

Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-27 18:49:24 -04:00
Dai Ngo
147abcacee NFSD: Fix problem of COMMIT and NFS4ERR_DELAY in infinite loop
The following request sequence to the same file causes the NFS client and
server getting into an infinite loop with COMMIT and NFS4ERR_DELAY:

OPEN
REMOVE
WRITE
COMMIT

Problem reported by recall11, recall12, recall14, recall20, recall22,
recall40, recall42, recall48, recall50 of nfstest suite.

This patch restores the handling of race condition in nfsd_file_do_acquire
with unlink to that prior of the regression.

Fixes: ac3a2585f0 ("nfsd: rework refcounting in filecache")
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-27 18:49:24 -04:00
Jeff Layton
92e4a6733f nfsd: simplify the delayed disposal list code
When queueing a dispose list to the appropriate "freeme" lists, it
pointlessly queues the objects one at a time to an intermediate list.

Remove a few helpers and just open code a list_move to make it more
clear and efficient. Better document the resulting functions with
kerneldoc comments.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:05:01 -04:00
Chuck Lever
0f5162480b NFSD: Watch for rq_pages bounds checking errors in nfsd_splice_actor()
There have been several bugs over the years where the NFSD splice
actor has attempted to write outside the rq_pages array.

This is a "should never happen" condition, but if for some reason
the pipe splice actor should attempt to walk past the end of
rq_pages, it needs to terminate the READ operation to prevent
corruption of the pointer addresses in the fields just beyond the
array.

A server crash is thus prevented. Since the code is not behaving,
the READ operation returns -EIO to the client. None of the READ
payload data can be trusted if the splice actor isn't operating as
expected.

Suggested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
2023-04-26 09:05:01 -04:00
NeilBrown
cf64b9bce9 SUNRPC: return proper error from get_expiry()
The get_expiry() function currently returns a timestamp, and uses the
special return value of 0 to indicate an error.

Unfortunately this causes a problem when 0 is the correct return value.

On a system with no RTC it is possible that the boot time will be seen
to be "3".  When exportfs probes to see if a particular filesystem
supports NFS export it tries to cache information with an expiry time of
"3".  The intention is for this to be "long in the past".  Even with no
RTC it will not be far in the future (at most a second or two) so this
is harmless.
But if the boot time happens to have been calculated to be "3", then
get_expiry will fail incorrectly as it converts the number to "seconds
since bootime" - 0.

To avoid this problem we change get_expiry() to report the error quite
separately from the expiry time.  The error is now the return value.
The expiry time is reported through a by-reference parameter.

Reported-by: Jerry Zhang <jerry@skydio.com>
Tested-by: Jerry Zhang <jerry@skydio.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:05:00 -04:00
Chuck Lever
c4c649ab41 NFSD: Convert filecache to rhltable
While we were converting the nfs4_file hashtable to use the kernel's
resizable hashtable data structure, Neil Brown observed that the
list variant (rhltable) would be better for managing nfsd_file items
as well. The nfsd_file hash table will contain multiple entries for
the same inode -- these should be kept together on a list. And, it
could be possible for exotic or malicious client behavior to cause
the hash table to resize itself on every insertion.

A nice simplification is that rhltable_lookup() can return a list
that contains only nfsd_file items that match a given inode, which
enables us to eliminate specialized hash table helper functions and
use the default functions provided by the rhashtable implementation).

Since we are now storing nfsd_file items for the same inode on a
single list, that effectively reduces the number of hash entries
that have to be tracked in the hash table. The mininum bucket count
is therefore lowered.

Light testing with fstests generic/531 show no regressions.

Suggested-by: Neil Brown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:59 -04:00
Jeff Layton
dcb779fcd4 nfsd: allow reaping files still under writeback
On most filesystems, there is no reason to delay reaping an nfsd_file
just because its underlying inode is still under writeback. nfsd just
relies on client activity or the local flusher threads to do writeback.

The main exception is NFS, which flushes all of its dirty data on last
close. Add a new EXPORT_OP_FLUSH_ON_CLOSE flag to allow filesystems to
signal that they do this, and only skip closing files under writeback on
such filesystems.

Also, remove a redundant NULL file pointer check in
nfsd_file_check_writeback, and clean up nfs's export op flag
definitions.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:59 -04:00
Jeff Layton
972cc0e092 nfsd: update comment over __nfsd_file_cache_purge
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:59 -04:00
Jeff Layton
b2ff1bd71d nfsd: don't take/put an extra reference when putting a file
The last thing that filp_close does is an fput, so don't bother taking
and putting the extra reference.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:59 -04:00
Jeff Layton
b680cb9b73 nfsd: add some comments to nfsd_file_do_acquire
David Howells mentioned that he found this bit of code confusing, so
sprinkle in some comments to clarify.

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:58 -04:00
Jeff Layton
c6593366c0 nfsd: don't kill nfsd_files because of lease break error
An error from break_lease is non-fatal, so we needn't destroy the
nfsd_file in that case. Just put the reference like we normally would
and return the error.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:58 -04:00
Jeff Layton
d69b8dbfd0 nfsd: simplify test_bit return in NFSD_FILE_KEY_FULL comparator
test_bit returns bool, so we can just compare the result of that to the
key->gc value without the "!!".

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:58 -04:00
Jeff Layton
6c31e4c988 nfsd: NFSD_FILE_KEY_INODE only needs to find GC'ed entries
Since v4 files are expected to be long-lived, there's little value in
closing them out of the cache when there is conflicting access.

Change the comparator to also match the gc value in the key. Change both
of the current users of that key to set the gc value in the key to
"true".

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:58 -04:00
Jeff Layton
b8bea9f6cd nfsd: don't open-code clear_and_wake_up_bit
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-26 09:04:58 -04:00
Linus Torvalds
7bcff5a396 v6.4/vfs.acl
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZEEhwgAKCRCRxhvAZXjc
 otwgAQDXHnKiPm/d76lITXbxdUNCtvZz+ig26EbOrD+vEszzIQEA81dru0QbCNCt
 ctoZdcsmtKbt2VaYQF1CDOhlnNg5VQM=
 =pER1
 -----END PGP SIGNATURE-----

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
2023-04-24 13:35:23 -07:00
Linus Torvalds
ceeea1b782 nfsd-6.3 fixes:
- Fix a crash and a resource leak in NFSv4 COMPOUND processing
 - Fix issues with AUTH_SYS credential handling
 - Try again to address an NFS/NFSD/SUNRPC build dependency regression
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmQsLHMACgkQM2qzM29m
 f5eNAA/8DokMQLQ+gN8zhQNqmw92sUdW3m41o0/DfETVXyE60sX8uOE7PktSGwfz
 fWMMiQpvmnmw/lbO84XQ9i8E0hjh8cT26l1CJum4VgSFiBJJvIqNxb0Yro43R4Jc
 1wU2AOpC9qzCokdHhHKszDXuOgsz3v5OMJSQz3mG50dlq8/+6KKrCnK6jakyrvxr
 vKcVMsoENhxh2MnJfbsIQ70UM/rF6dmZWzGuBJH51Fkt+0FD9cnxXZKCkv1+D8JN
 5Hr+8rv4I/VqBGDzv9QHoEowZr70e8UUi2UME/jwSArhdxwsfPEqV/qWwHq9Q133
 RW40Gco7/E3JUjpAVTRXVGSB+LwU1EvhWQ9qSpSx5D2CPAHJ9hsOw4I54+Q0vD+j
 2druOpqIITZOvI3K54ZJXa2LK6SpZ8NnncP5YkLWOwR0Wqohy1U8Sm5uOiMs+IJa
 neTxL7f+u3MDQgaDCTuBkI4oKzSDF/ZiMTWh52iPyy9x03SRYXbW6UgqDiySIg0P
 jvvaDFCvKvvL2qEmksMoQbWxSjVj8PqL+qJIxQNIZwHbows6paL+l0rdSPXc+l2O
 97GBlqNPfHt+AjfJvGDscaIcLA+gu+ErzwxG6BLKvB9QcX9/F3A62Nh3txpe5Q1r
 M5NyQwK3vVQcTejMqw34sBqp3EeI5iIJ9CjD/2tN+dUpeHyQld8=
 =bk6S
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Fix a crash and a resource leak in NFSv4 COMPOUND processing

 - Fix issues with AUTH_SYS credential handling

 - Try again to address an NFS/NFSD/SUNRPC build dependency regression

* tag 'nfsd-6.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: callback request does not use correct credential for AUTH_SYS
  NFS: Remove "select RPCSEC_GSS_KRB5
  sunrpc: only free unix grouplist after RCU settles
  nfsd: call op_release, even when op_func returns an error
  NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL
2023-04-04 11:20:55 -07:00
Dai Ngo
7de82c2f36 NFSD: callback request does not use correct credential for AUTH_SYS
Currently callback request does not use the credential specified in
CREATE_SESSION if the security flavor for the back channel is AUTH_SYS.

Problem was discovered by pynfs 4.1 DELEG5 and DELEG7 test with error:
DELEG5   st_delegation.testCBSecParms     : FAILURE
           expected callback with uid, gid == 17, 19, got 0, 0

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Fixes: 8276c902bb ("SUNRPC: remove uid and gid from struct auth_cred")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-04-04 09:55:27 -04:00
Jeff Layton
15a8b55dbb nfsd: call op_release, even when op_func returns an error
For ops with "trivial" replies, nfsd4_encode_operation will shortcut
most of the encoding work and skip to just marshalling up the status.
One of the things it skips is calling op_release. This could cause a
memory leak in the layoutget codepath if there is an error at an
inopportune time.

Have the compound processing engine always call op_release, even when
op_func sets an error in op->status. With this change, we also need
nfsd4_block_get_device_info_scsi to set the gd_device pointer to NULL
on error to avoid a double free.

Reported-by: Zhi Li <yieli@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2181403
Fixes: 34b1744c91 ("nfsd4: define ->op_release for compound ops")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-03-31 17:29:49 -04:00
Chuck Lever
804d8e0a6e NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL
OPDESC() simply indexes into nfsd4_ops[] by the op's operation
number, without range checking that value. It assumes callers are
careful to avoid calling it with an out-of-bounds opnum value.

nfsd4_decode_compound() is not so careful, and can invoke OPDESC()
with opnum set to OP_ILLEGAL, which is 10044 -- well beyond the end
of nfsd4_ops[].

Reported-by: Jeff Layton <jlayton@kernel.org>
Fixes: f4f9ef4a1b ("nfsd4: opdesc will be useful outside nfs4proc.c")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-03-31 17:28:49 -04:00
Linus Torvalds
a2eaf246f5 nfsd-6.3 fixes:
- Fix a crash during NFS READs from certain client implementations
 - Address a minor kbuild regression in v6.3
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmQaEJgACgkQM2qzM29m
 f5ceYBAAiGHz+ISIIirg2+B5DttDL5ssPoqbgfZ16JZfBgaDduOg8oK7pbILv1nf
 4ufZQRcLpJDSnzhqNXxQE/L4Vsei8+tqkbwILSqFsCBZk5ei2AYSsZMu7Ptf8X8X
 Y+KZ55Bko0uTYAsglnPiEaDEGeq0ZYwfUc5/bnw7ZzXdAHhlwgjoAads6Q25A9f1
 6ZuKQ6nIis/ok9q88GdLf7x51IdKrXTrkC1iYAeVTXCgR3qXPezqmPOzW44rZs0t
 TMzUgDuyPgvB5eT/N+pwXoI9Bli9v1PFoXZjm2NchhJ/Iy6Gt1eEEB93J/qRSU/x
 ziJLkk0jnJEPWJ0Ht5li4+60b58t2OoWCTJTr3FzHCcF5Iqr7YjenSi2U8IT84ct
 EeFdqR2nZpJ4Y1wbAhTjQ2w6rw5WpaXDLHCRRdE7OF/D121n3FkSNo8DtSn+fbR8
 sFDpOruZn4tjgpf3AjCR1zbyKw9baC6clhnLrW6AE6T4ht9XwfE6eCUSy48FSMzg
 4IZKLcofQh2UEvlVtCvGOjtcK151eFKocsq+p6/yhYE6BM20Z3dBqhw9iBzqOAPg
 0qZk60AWl9W5h7M+ovkGAZpwXv4djsdWf7LbFuYOQ0kodzXOQ/5sFQm4zC5F3I1Z
 8WPPA9SkYyNiNSBUt65tca4JNw5h6x9A3scPWtuHB7Lz3fuGTnE=
 =frHb
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Fix a crash during NFS READs from certain client implementations

 - Address a minor kbuild regression in v6.3

* tag 'nfsd-6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: don't replace page in rq_pages if it's a continuation of last page
  NFS & NFSD: Update GSS dependencies
2023-03-21 14:48:38 -07:00
Jeff Layton
27c934dd88 nfsd: don't replace page in rq_pages if it's a continuation of last page
The splice read calls nfsd_splice_actor to put the pages containing file
data into the svc_rqst->rq_pages array. It's possible however to get a
splice result that only has a partial page at the end, if (e.g.) the
filesystem hands back a short read that doesn't cover the whole page.

nfsd_splice_actor will plop the partial page into its rq_pages array and
return. Then later, when nfsd_splice_actor is called again, the
remainder of the page may end up being filled out. At this point,
nfsd_splice_actor will put the page into the array _again_ corrupting
the reply. If this is done enough times, rq_next_page will overrun the
array and corrupt the trailing fields -- the rq_respages and
rq_next_page pointers themselves.

If we've already added the page to the array in the last pass, don't add
it to the array a second time when dealing with a splice continuation.
This was originally handled properly in nfsd_splice_actor, but commit
91e23b1c39 ("NFSD: Clean up nfsd_splice_actor()") removed the check
for it.

Fixes: 91e23b1c39 ("NFSD: Clean up nfsd_splice_actor()")
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Dario Lesca <d.lesca@solinos.it>
Tested-by: David Critch <dcritch@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2150630
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-03-17 18:18:15 -04:00
Linus Torvalds
92cadfcffa nfsd-6.3 fixes:
- Protect NFSD writes against filesystem freezing
 - Fix a potential memory leak during server shutdown
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmQLPvQACgkQM2qzM29m
 f5crgRAAiuZvYynBppTxeEZ9ITLRJCgeYhTCJDBFngh3NZtW0UxrTUfYIry/MJTm
 j520mvdzx8+OVyasUJCMoy+dY/1toeCaCspfEdyul47JRVrxuzJokbYzyV5fFZav
 q3vDNHdBXOkrJkXvJd+VtbdZa2iYBMIQ1pTc6vG2FbUaxfNqZyg7uKug/R2Q/Ipj
 tF587jXQuMvpPwlXOeFol3fhLQCO9KjTrZF/d4+m5+KTSQ4sgzrgoWuVD/39Is4Q
 bVx5hBX74PFNHaFMqviIjtIEFjrOfe6wVjdNgbmpzbEiUm9VGZ6zJ2k+LsnawMIw
 8W3178Yjp+SEb21X+b+pe7/efIqD01SOX36zUOETL9gOvX3aMHbTuDGERQlCBUdZ
 9pcUwWfzeGzQSsnEvEi05HlnrDQpeavAc4tVYWgiEvO2S8cngXgsuoGhUO2ov8qY
 scq4PQGclpmR6IMYDJLL6JbOvfBDIMoFHGbDbdkjpkkhoRHgtQgnRebOgB20bxom
 D3XPk39U2CbVX9UJqgPN0yvA8L4biG4RPNZZNOjFtOup6oggpzwgN2M9h1ZhuulG
 bTOjHWl9NJmSNIYUDzOyH7m98UCI1pEXcH1kkV7vjjAIAPbn3ovXgzMjSBqDVvNj
 tyqGujS4snRb5/NI8g6O+VyTbMSnimu+tZpUvKH+4oSBH9ZAUVI=
 =z6NN
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Protect NFSD writes against filesystem freezing

 - Fix a potential memory leak during server shutdown

* tag 'nfsd-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  SUNRPC: Fix a server shutdown leak
  NFSD: Protect against filesystem freezing
2023-03-10 08:45:30 -08:00
Chuck Lever
e57d065277 NFS & NFSD: Update GSS dependencies
Geert reports that:
> On v6.2, "make ARCH=m68k defconfig" gives you
> CONFIG_RPCSEC_GSS_KRB5=m
> On v6.3, it became builtin, due to dropping the dependencies on
> the individual crypto modules.
>
> $ grep -E "CRYPTO_(MD5|DES|CBC|CTS|ECB|HMAC|SHA1|AES)" .config
> CONFIG_CRYPTO_AES=y
> CONFIG_CRYPTO_AES_TI=m
> CONFIG_CRYPTO_DES=m
> CONFIG_CRYPTO_CBC=m
> CONFIG_CRYPTO_CTS=m
> CONFIG_CRYPTO_ECB=m
> CONFIG_CRYPTO_HMAC=m
> CONFIG_CRYPTO_MD5=m
> CONFIG_CRYPTO_SHA1=m

This behavior is triggered by the "default y" in the definition of
RPCSEC_GSS.

The "default y" was added in 2010 by commit df486a2590 ("NFS: Fix
the selection of security flavours in Kconfig"). However,
svc_gss_principal was removed in 2012 by commit 03a4e1f6dd
("nfsd4: move principal name into svc_cred"), so the 2010 fix is
no longer necessary. We can safely change the NFS_V4 and NFSD_V4
dependencies back to RPCSEC_GSS_KRB5 to get the nicer v6.2
behavior back.

Selecting KRB5 symbolically represents the true requirement here:
that all spec-compliant NFSv4 implementations must have Kerberos
available to use.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: dfe9a12345 ("SUNRPC: Enable rpcsec_gss_krb5.ko to be built without CRYPTO_DES")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-03-10 09:38:47 -05:00
Chuck Lever
fd9a2e1d51 NFSD: Protect against filesystem freezing
Flole observes this WARNING on occasion:

[1210423.486503] WARNING: CPU: 8 PID: 1524732 at fs/ext4/ext4_jbd2.c:75 ext4_journal_check_start+0x68/0xb0

Reported-by: <flole@flole.de>
Suggested-by: Jan Kara <jack@suse.cz>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217123
Fixes: 73da852e38 ("nfsd: use vfs_iter_read/write")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2023-03-07 09:33:42 -05:00
Christian Brauner
831be973aa
xattr: remove unused argument
his helpers is really just used to check for user.* xattr support so
don't make it pointlessly generic.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
2023-03-06 09:57:11 +01:00
Linus Torvalds
9fc2f99030 NFSD 6.3 Release Notes
Two significant security enhancements are part of this release:
 
 * NFSD's RPC header encoding and decoding, including RPCSEC GSS
   and gssproxy header parsing, has been overhauled to make it
   more memory-safe.
 
 * Support for Kerberos AES-SHA2-based encryption types has been
   added for both the NFS client and server. This provides a clean
   path for deprecating and removing insecure encryption types
   based on DES and SHA-1. AES-SHA2 is also FIPS-140 compliant, so
   that NFS with Kerberos may now be used on systems with fips
   enabled.
 
 In addition to these, NFSD is now able to handle crossing into an
 auto-mounted mount point on an exported NFS mount. A number of
 fixes have been made to NFSD's server-side copy implementation.
 
 RPC metrics have been converted to per-CPU variables. This helps
 reduce unnecessary cross-CPU and cross-node memory bus traffic,
 and significantly reduces noise when KCSAN is enabled.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEKLLlsBKG3yQ88j7+M2qzM29mf5cFAmPzgiYACgkQM2qzM29m
 f5dB2A//eqjpj+FgAN+UjygrwMC4ahAsPX3Sc3FG8/lTAiao3NFVFY2gxAiCPyVE
 CFk+tUyfL23oXvbyfIBe3LhxSBOf621xU6up2OzqAzJqh1Q9iUWB6as3I14to8ZU
 sWpxXo5ofwk1hzkbrvOAVkyfY0emwsr00iBeWMawkpBe8FZEQA31OYj3/xHr6bBI
 zEVlZPBZAZlp0DZ74tb+bBLs/EOnqKj+XLWcogCH13JB3sn2umF6cQNkYgsxvHGa
 TNQi4LEdzWZGme242LfBRiGGwm1xuVIjlAhYV/R1wIjaknE3QBzqfXc6lJx74WII
 HaqpRJGrKqdo7B+1gaXCl/AMS7YluED1CBrxuej0wBG7l2JEB7m2MFMQ4LTQjgsn
 nrr3P70DgbB4LuPCPyUS7dtsMmUXabIqP7niiCR4T1toH6lBmHAgEi4cFmkzg7Cd
 EoFzn888mtDpfx4fghcsRWS5oKXEzbPJfu5+IZOD63+UB+NGpi0Xo2s23sJPK8vz
 kqK/X63JYOUxWUvK0zkj/c/wW1cLqIaBwnSKbShou5/BL+cZVI+uJYrnEesgpoB2
 5fh/cZv3hdcoOPO7OfcjCLQYy4J6RCWajptnk/hcS3lMvBTBrnq697iAqCVURDKU
 Xfmlf7XbBwje+sk4eHgqVGEqqVjrEmoqbmA2OS44WSS5LDvxXdI=
 =ZG/7
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:
 "Two significant security enhancements are part of this release:

   - NFSD's RPC header encoding and decoding, including RPCSEC GSS and
     gssproxy header parsing, has been overhauled to make it more
     memory-safe.

   - Support for Kerberos AES-SHA2-based encryption types has been added
     for both the NFS client and server. This provides a clean path for
     deprecating and removing insecure encryption types based on DES and
     SHA-1. AES-SHA2 is also FIPS-140 compliant, so that NFS with
     Kerberos may now be used on systems with fips enabled.

  In addition to these, NFSD is now able to handle crossing into an
  auto-mounted mount point on an exported NFS mount. A number of fixes
  have been made to NFSD's server-side copy implementation.

  RPC metrics have been converted to per-CPU variables. This helps
  reduce unnecessary cross-CPU and cross-node memory bus traffic, and
  significantly reduces noise when KCSAN is enabled"

* tag 'nfsd-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (121 commits)
  NFSD: Clean up nfsd_symlink()
  NFSD: copy the whole verifier in nfsd_copy_write_verifier
  nfsd: don't fsync nfsd_files on last close
  SUNRPC: Fix occasional warning when destroying gss_krb5_enctypes
  nfsd: fix courtesy client with deny mode handling in nfs4_upgrade_open
  NFSD: fix problems with cleanup on errors in nfsd4_copy
  nfsd: fix race to check ls_layouts
  nfsd: don't hand out delegation on setuid files being opened for write
  SUNRPC: Remove ->xpo_secure_port()
  SUNRPC: Clean up the svc_xprt_flags() macro
  nfsd: remove fs/nfsd/fault_inject.c
  NFSD: fix leaked reference count of nfsd4_ssc_umount_item
  nfsd: clean up potential nfsd_file refcount leaks in COPY codepath
  nfsd: zero out pointers after putting nfsd_files on COPY setup error
  SUNRPC: Fix whitespace damage in svcauth_unix.c
  nfsd: eliminate __nfs4_get_fd
  nfsd: add some kerneldoc comments for stateid preprocessing functions
  nfsd: eliminate find_deleg_file_locked
  nfsd: don't take nfsd4_copy ref for OP_OFFLOAD_STATUS
  SUNRPC: Add encryption self-tests
  ...
2023-02-22 14:21:40 -08:00
Linus Torvalds
05e6295f7b fs.idmapped.v6.3
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCY+5NlQAKCRCRxhvAZXjc
 orOaAP9i2h3OJy95nO2Fpde0Bt2UT+oulKCCcGlvXJ8/+TQpyQD/ZQq47gFQ0EAz
 Br5NxeyGeecAb0lHpFz+CpLGsxMrMwQ=
 =+BG5
 -----END PGP SIGNATURE-----

Merge tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping

Pull vfs idmapping updates from Christian Brauner:

 - Last cycle we introduced the dedicated struct mnt_idmap type for
   mount idmapping and the required infrastucture in 256c8aed2b ("fs:
   introduce dedicated idmap type for mounts"). As promised in last
   cycle's pull request message this converts everything to rely on
   struct mnt_idmap.

   Currently we still pass around the plain namespace that was attached
   to a mount. This is in general pretty convenient but it makes it easy
   to conflate namespaces that are relevant on the filesystem with
   namespaces that are relevant on the mount level. Especially for
   non-vfs developers without detailed knowledge in this area this was a
   potential source for bugs.

   This finishes the conversion. Instead of passing the plain namespace
   around this updates all places that currently take a pointer to a
   mnt_userns with a pointer to struct mnt_idmap.

   Now that the conversion is done all helpers down to the really
   low-level helpers only accept a struct mnt_idmap argument instead of
   two namespace arguments.

   Conflating mount and other idmappings will now cause the compiler to
   complain loudly thus eliminating the possibility of any bugs. This
   makes it impossible for filesystem developers to mix up mount and
   filesystem idmappings as they are two distinct types and require
   distinct helpers that cannot be used interchangeably.

   Everything associated with struct mnt_idmap is moved into a single
   separate file. With that change no code can poke around in struct
   mnt_idmap. It can only be interacted with through dedicated helpers.
   That means all filesystems are and all of the vfs is completely
   oblivious to the actual implementation of idmappings.

   We are now also able to extend struct mnt_idmap as we see fit. For
   example, we can decouple it completely from namespaces for users that
   don't require or don't want to use them at all. We can also extend
   the concept of idmappings so we can cover filesystem specific
   requirements.

   In combination with the vfs{g,u}id_t work we finished in v6.2 this
   makes this feature substantially more robust and thus difficult to
   implement wrong by a given filesystem and also protects the vfs.

 - Enable idmapped mounts for tmpfs and fulfill a longstanding request.

   A long-standing request from users had been to make it possible to
   create idmapped mounts for tmpfs. For example, to share the host's
   tmpfs mount between multiple sandboxes. This is a prerequisite for
   some advanced Kubernetes cases. Systemd also has a range of use-cases
   to increase service isolation. And there are more users of this.

   However, with all of the other work going on this was way down on the
   priority list but luckily someone other than ourselves picked this
   up.

   As usual the patch is tiny as all the infrastructure work had been
   done multiple kernel releases ago. In addition to all the tests that
   we already have I requested that Rodrigo add a dedicated tmpfs
   testsuite for idmapped mounts to xfstests. It is to be included into
   xfstests during the v6.3 development cycle. This should add a slew of
   additional tests.

* tag 'fs.idmapped.v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping: (26 commits)
  shmem: support idmapped mounts for tmpfs
  fs: move mnt_idmap
  fs: port vfs{g,u}id helpers to mnt_idmap
  fs: port fs{g,u}id helpers to mnt_idmap
  fs: port i_{g,u}id_into_vfs{g,u}id() to mnt_idmap
  fs: port i_{g,u}id_{needs_}update() to mnt_idmap
  quota: port to mnt_idmap
  fs: port privilege checking helpers to mnt_idmap
  fs: port inode_owner_or_capable() to mnt_idmap
  fs: port inode_init_owner() to mnt_idmap
  fs: port acl to mnt_idmap
  fs: port xattr to mnt_idmap
  fs: port ->permission() to pass mnt_idmap
  fs: port ->fileattr_set() to pass mnt_idmap
  fs: port ->set_acl() to pass mnt_idmap
  fs: port ->get_acl() to pass mnt_idmap
  fs: port ->tmpfile() to pass mnt_idmap
  fs: port ->rename() to pass mnt_idmap
  fs: port ->mknod() to pass mnt_idmap
  fs: port ->mkdir() to pass mnt_idmap
  ...
2023-02-20 11:53:11 -08:00
Linus Torvalds
de630176bd i_version handling changes for v6.3
-----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEES8DXskRxsqGE6vXTAA5oQRlWghUFAmPuDAUTHGpsYXl0b25A
 a2VybmVsLm9yZwAKCRAADmhBGVaCFQu9D/9ZEYVvoY3s7tK5Cw+My+1U0sNQFUW0
 D46kVF0bLxv09G8prI6FZFQORguSMZli3TEsdyUbU12ak3kNHYkTW6AxxnN0jQVE
 ur6f5iOauh9mWcv2S9/gulz9KH2uiG1rGHWfClfoZgQI1QCatfaKh9nrEcNrPy71
 qpTbcN8AOhhYDP2ZAHajuwTuak1jLBHYN7ihfaUPyex9kAxUalbw5wIsXYfTB+Mn
 /xPuCAN9YL5KpuUzVSF7QfWWVEiqErSFeFip+NCS/srihURKr14JuVSwUwkTn8rR
 ONWBawXDw+eiWZ1nQmzvPTazbvsQGO1cKx8A20nOLmJjtRqAGlfngDQrCchkoSg7
 SwYDiDpDqkg5PTWSfkDMG1wY/tEm6dO89P912kY+jFuGJIrG4HPkOR20StmKkuz5
 La4bUs5UwucxxS9Hlu5+aFGrYFtuixWpR/1Wu5ITRtoq+j5vzHHrQ1wkbezNXs0w
 VxS7YqW1TDDUUXgBzYOctmQ50ADVVC63J6AbhA7w7Qh+1vpEvyqYcWZw/Vd54bPP
 tDh3FFnEGJjX0QqtdpHpyIiOm/BXiJ/8y96vEAxVzXtOmb59AQDCPq99HgWa4G8L
 62ltF7qkgXKOsWCaKk07uycE0zISnx1ZXk9bvLFeN02XhRkPxevV93Yn/YiJ7nZe
 xcR23eGRsseA/w==
 =EKA6
 -----END PGP SIGNATURE-----

Merge tag 'iversion-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux

Pull i_version updates from Jeff Layton:
 "This overhauls how we handle i_version queries from nfsd.

  Instead of having special routines and grabbing the i_version field
  directly out of the inode in some cases, we've moved most of the
  handling into the various filesystems' getattr operations. As a bonus,
  this makes ceph's change attribute usable by knfsd as well.

  This should pave the way for future work to make this value queryable
  by userland, and to make it more resilient against rolling back on a
  crash"

* tag 'iversion-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  nfsd: remove fetch_iversion export operation
  nfsd: use the getattr operation to fetch i_version
  nfsd: move nfsd4_change_attribute to nfsfh.c
  ceph: report the inode version in getattr if requested
  nfs: report the inode version in getattr if requested
  vfs: plumb i_version handling into struct kstat
  fs: clarify when the i_version counter must be updated
  fs: uninline inode_query_iversion
2023-02-20 11:21:02 -08:00