According to RFC2203, the RPCSEC_GSS sequence numbers are bounded to
an upper limit of MAXSEQ = 0x80000000. Ensure that we handle that
correctly.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Note that there is a conflict with the rdma tree in this pull request, since
we delete a file that has been changed in the rdma tree. Hopefully that's
easy enough to resolve!
We also were unable to track down a maintainer for Neil Brown's changes to
the generic cred code that are prerequisites to his RPC cred cleanup patches.
We've been asking around for several months without any response, so
hopefully it's okay to include those patches in this pull request.
Stable bugfixes:
- xprtrdma: Yet another double DMA-unmap # v4.20
Features:
- Allow some /proc/sys/sunrpc entries without CONFIG_SUNRPC_DEBUG
- Per-xprt rdma receive workqueues
- Drop support for FMR memory registration
- Make port= mount option optional for RDMA mounts
Other bugfixes and cleanups:
- Remove unused nfs4_xdev_fs_type declaration
- Fix comments for behavior that has changed
- Remove generic RPC credentials by switching to 'struct cred'
- Fix crossing mountpoints with different auth flavors
- Various xprtrdma fixes from testing and auditing the close code
- Fixes for disconnect issues when using xprtrdma with krb5
- Clean up and improve xprtrdma trace points
- Fix NFS v4.2 async copy reboot recovery
-----BEGIN PGP SIGNATURE-----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=DvVW
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.21-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client updates from Anna Schumaker:
"Stable bugfixes:
- xprtrdma: Yet another double DMA-unmap # v4.20
Features:
- Allow some /proc/sys/sunrpc entries without CONFIG_SUNRPC_DEBUG
- Per-xprt rdma receive workqueues
- Drop support for FMR memory registration
- Make port= mount option optional for RDMA mounts
Other bugfixes and cleanups:
- Remove unused nfs4_xdev_fs_type declaration
- Fix comments for behavior that has changed
- Remove generic RPC credentials by switching to 'struct cred'
- Fix crossing mountpoints with different auth flavors
- Various xprtrdma fixes from testing and auditing the close code
- Fixes for disconnect issues when using xprtrdma with krb5
- Clean up and improve xprtrdma trace points
- Fix NFS v4.2 async copy reboot recovery"
* tag 'nfs-for-4.21-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (63 commits)
sunrpc: convert to DEFINE_SHOW_ATTRIBUTE
sunrpc: Add xprt after nfs4_test_session_trunk()
sunrpc: convert unnecessary GFP_ATOMIC to GFP_NOFS
sunrpc: handle ENOMEM in rpcb_getport_async
NFS: remove unnecessary test for IS_ERR(cred)
xprtrdma: Prevent leak of rpcrdma_rep objects
NFSv4.2 fix async copy reboot recovery
xprtrdma: Don't leak freed MRs
xprtrdma: Add documenting comment for rpcrdma_buffer_destroy
xprtrdma: Replace outdated comment for rpcrdma_ep_post
xprtrdma: Update comments in frwr_op_send
SUNRPC: Fix some kernel doc complaints
SUNRPC: Simplify defining common RPC trace events
NFS: Fix NFSv4 symbolic trace point output
xprtrdma: Trace mapping, alloc, and dereg failures
xprtrdma: Add trace points for calls to transport switch methods
xprtrdma: Relocate the xprtrdma_mr_map trace points
xprtrdma: Clean up of xprtrdma chunk trace points
xprtrdma: Remove unused fields from rpcrdma_ia
xprtrdma: Cull dprintk() call sites
...
NFSv4.2 client, and cleaning up some convoluted backchannel server code
in the process. Otherwise, miscellaneous smaller bugfixes and cleanup.
-----BEGIN PGP SIGNATURE-----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=dRLp
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.21' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Thanks to Vasily Averin for fixing a use-after-free in the
containerized NFSv4.2 client, and cleaning up some convoluted
backchannel server code in the process.
Otherwise, miscellaneous smaller bugfixes and cleanup"
* tag 'nfsd-4.21' of git://linux-nfs.org/~bfields/linux: (25 commits)
nfs: fixed broken compilation in nfs_callback_up_net()
nfs: minor typo in nfs4_callback_up_net()
sunrpc: fix debug message in svc_create_xprt()
sunrpc: make visible processing error in bc_svc_process()
sunrpc: remove unused xpo_prep_reply_hdr callback
sunrpc: remove svc_rdma_bc_class
sunrpc: remove svc_tcp_bc_class
sunrpc: remove unused bc_up operation from rpc_xprt_ops
sunrpc: replace svc_serv->sv_bc_xprt by boolean flag
sunrpc: use-after-free in svc_process_common()
sunrpc: use SVC_NET() in svcauth_gss_* functions
nfsd: drop useless LIST_HEAD
lockd: Show pid of lockd for remote locks
NFSD remove OP_CACHEME from 4.2 op_flags
nfsd: Return EPERM, not EACCES, in some SETATTR cases
sunrpc: fix cache_head leak due to queued request
nfsd: clean up indentation, increase indentation in switch statement
svcrdma: Optimize the logic that selects the R_key to invalidate
nfsd: fix a warning in __cld_pipe_upcall()
nfsd4: fix crash on writing v4_end_grace before nfsd startup
...
Clean up some warnings observed when building with "make W=1".
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This now always just does get_rpccred(), so we
don't need an operation pointer to know to do that.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
NFS needs to know when a credential is about to expire so that
it can modify write-back behaviour to finish the write inside the
expiry time.
It currently uses functions in SUNRPC code which make use of a
fairly complex callback scheme and flags in the generic credientials.
As I am working to discard the generic credentials, this has to change.
This patch moves the logic into NFS, in part by finding and caching
the low-level credential in the open_context. We then make direct
cred-api calls on that.
This makes the code much simpler and removes a dependency on generic
rpc credentials.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
The cred is a machine_cred iff ->principal is set, so there is no
need for the extra flag.
There is one case which deserves some
explanation. nfs4_root_machine_cred() calls rpc_lookup_machine_cred()
with a NULL principal name which results in not getting a machine
credential, but getting a root credential instead.
This appears to be what is expected of the caller, and is
clearly the result provided by both auth_unix and auth_gss
which already ignore the flag.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
The SUNRPC credential framework was put together before
Linux has 'struct cred'. Now that we have it, it makes sense to
use it.
This first step just includes a suitable 'struct cred *' pointer
in every 'struct auth_cred' and almost every 'struct rpc_cred'.
The rpc_cred used for auth_null has a NULL 'struct cred *' as nothing
else really makes sense.
For rpc_cred, the pointer is reference counted.
For auth_cred it isn't. struct auth_cred are either allocated on
the stack, in which case the thread owns a reference to the auth,
or are part of 'struct generic_cred' in which case gc_base owns the
reference, and "acred" shares it.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
call_encode can be invoked more than once per RPC call. Ensure that
each call to gss_wrap_req_priv does not overwrite pointers to
previously allocated memory.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Commit 07d02a67b7fa causes a use-after free in the RPCSEC_GSS credential
destroy code, because the call to get_rpccred() in gss_destroying_context()
will now always fail to increment the refcount.
While we could just replace the get_rpccred() with a refcount_set(), that
would have the unfortunate consequence of resurrecting a credential in
the credential cache for which we are in the process of destroying the
RPCSEC_GSS context. Rather than do this, we choose to make a copy that
is never added to the cache and use that to destroy the context.
Fixes: 07d02a67b7fa ("SUNRPC: Simplify lookup code")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
The seq_send & seq_send64 fields in struct krb5_ctx are used as
atomically incrementing counters. This is implemented using cmpxchg() &
cmpxchg64() to implement what amount to custom versions of
atomic_fetch_inc() & atomic64_fetch_inc().
Besides the duplication, using cmpxchg64() has another major drawback in
that some 32 bit architectures don't provide it. As such commit
571ed1fd2390 ("SUNRPC: Replace krb5_seq_lock with a lockless scheme")
resulted in build failures for some architectures.
Change seq_send to be an atomic_t and seq_send64 to be an atomic64_t,
then use atomic(64)_* functions to manipulate the values. The atomic64_t
type & associated functions are provided even on architectures which
lack real 64 bit atomic memory access via CONFIG_GENERIC_ATOMIC64 which
uses spinlocks to serialize access. This fixes the build failures for
architectures lacking cmpxchg64().
A potential alternative that was raised would be to provide cmpxchg64()
on the 32 bit architectures that currently lack it, using spinlocks.
However this would provide a version of cmpxchg64() with semantics a
little different to the implementations on architectures with real 64
bit atomics - the spinlock-based implementation would only work if all
access to the memory used with cmpxchg64() is *always* performed using
cmpxchg64(). That is not currently a requirement for users of
cmpxchg64(), and making it one seems questionable. As such avoiding
cmpxchg64() outside of architecture-specific code seems best,
particularly in cases where atomic64_t seems like a better fit anyway.
The CONFIG_GENERIC_ATOMIC64 implementation of atomic64_* functions will
use spinlocks & so faces the same issue, but with the key difference
that the memory backing an atomic64_t ought to always be accessed via
the atomic64_* functions anyway making the issue moot.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: 571ed1fd2390 ("SUNRPC: Replace krb5_seq_lock with a lockless scheme")
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: J. Bruce Fields <bfields@fieldses.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: linux-nfs@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
already supported COPY, by copying a limited amount of data and then
returning a short result, letting the client resend. The asynchronous
protocol should offer better performance at the expense of some
complexity.
The other highlight is Trond's work to convert the duplicate reply cache
to a red-black tree, and to move it and some other server caches to RCU.
(Previously these have meant taking global spinlocks on every RPC.)
Otherwise, some RDMA work and miscellaneous bugfixes.
-----BEGIN PGP SIGNATURE-----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=TTo0
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.20' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Olga added support for the NFSv4.2 asynchronous copy protocol. We
already supported COPY, by copying a limited amount of data and then
returning a short result, letting the client resend. The asynchronous
protocol should offer better performance at the expense of some
complexity.
The other highlight is Trond's work to convert the duplicate reply
cache to a red-black tree, and to move it and some other server caches
to RCU. (Previously these have meant taking global spinlocks on every
RPC)
Otherwise, some RDMA work and miscellaneous bugfixes"
* tag 'nfsd-4.20' of git://linux-nfs.org/~bfields/linux: (30 commits)
lockd: fix access beyond unterminated strings in prints
nfsd: Fix an Oops in free_session()
nfsd: correctly decrement odstate refcount in error path
svcrdma: Increase the default connection credit limit
svcrdma: Remove try_module_get from backchannel
svcrdma: Remove ->release_rqst call in bc reply handler
svcrdma: Reduce max_send_sges
nfsd: fix fall-through annotations
knfsd: Improve lookup performance in the duplicate reply cache using an rbtree
knfsd: Further simplify the cache lookup
knfsd: Simplify NFS duplicate replay cache
knfsd: Remove dead code from nfsd_cache_lookup
SUNRPC: Simplify TCP receive code
SUNRPC: Replace the cache_detail->hash_lock with a regular spinlock
SUNRPC: Remove non-RCU protected lookup
NFS: Fix up a typo in nfs_dns_ent_put
NFS: Lockless DNS lookups
knfsd: Lockless lookup of NFSv4 identities.
SUNRPC: Lockless server RPCSEC_GSS context lookup
knfsd: Allow lockless lookups of the exports
...
Use RCU protection for looking up the RPCSEC_GSS context.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Highlights include:
Stable fixes:
- Fix the NFSv4.1 r/wsize sanity checking
- Reset the RPC/RDMA credit grant properly after a disconnect
- Fix a missed page unlock after pg_doio()
Features and optimisations:
- Overhaul of the RPC client socket code to eliminate a locking bottleneck
and reduce the latency when transmitting lots of requests in parallel.
- Allow parallelisation of the RPCSEC_GSS encoding of an RPC request.
- Convert the RPC client socket receive code to use iovec_iter() for
improved efficiency.
- Convert several NFS and RPC lookup operations to use RCU instead of
taking global locks.
- Avoid the need for BH-safe locks in the RPC/RDMA back channel.
Bugfixes and cleanups:
- Fix lock recovery during NFSv4 delegation recalls
- Fix the NFSv4 + NFSv4.1 "lookup revalidate + open file" case.
- Fixes for the RPC connection metrics
- Various RPC client layer cleanups to consolidate stream based sockets
- RPC/RDMA connection cleanups
- Simplify the RPC/RDMA cleanup after memory operation failures
- Clean ups for NFS v4.2 copy completion and NFSv4 open state reclaim.
-----BEGIN PGP SIGNATURE-----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=Fn8z
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Stable fixes:
- Fix the NFSv4.1 r/wsize sanity checking
- Reset the RPC/RDMA credit grant properly after a disconnect
- Fix a missed page unlock after pg_doio()
Features and optimisations:
- Overhaul of the RPC client socket code to eliminate a locking
bottleneck and reduce the latency when transmitting lots of
requests in parallel.
- Allow parallelisation of the RPCSEC_GSS encoding of an RPC request.
- Convert the RPC client socket receive code to use iovec_iter() for
improved efficiency.
- Convert several NFS and RPC lookup operations to use RCU instead of
taking global locks.
- Avoid the need for BH-safe locks in the RPC/RDMA back channel.
Bugfixes and cleanups:
- Fix lock recovery during NFSv4 delegation recalls
- Fix the NFSv4 + NFSv4.1 "lookup revalidate + open file" case.
- Fixes for the RPC connection metrics
- Various RPC client layer cleanups to consolidate stream based
sockets
- RPC/RDMA connection cleanups
- Simplify the RPC/RDMA cleanup after memory operation failures
- Clean ups for NFS v4.2 copy completion and NFSv4 open state
reclaim"
* tag 'nfs-for-4.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (97 commits)
SUNRPC: Convert the auth cred cache to use refcount_t
SUNRPC: Convert auth creds to use refcount_t
SUNRPC: Simplify lookup code
SUNRPC: Clean up the AUTH cache code
NFS: change sign of nfs_fh length
sunrpc: safely reallow resvport min/max inversion
nfs: remove redundant call to nfs_context_set_write_error()
nfs: Fix a missed page unlock after pg_doio()
SUNRPC: Fix a compile warning for cmpxchg64()
NFSv4.x: fix lock recovery during delegation recall
SUNRPC: use cmpxchg64() in gss_seq_send64_fetch_and_inc()
xprtrdma: Squelch a sparse warning
xprtrdma: Clean up xprt_rdma_disconnect_inject
xprtrdma: Add documenting comments
xprtrdma: Report when there were zero posted Receives
xprtrdma: Move rb_flags initialization
xprtrdma: Don't disable BH's in backchannel server
xprtrdma: Remove memory address of "ep" from an error message
xprtrdma: Rename rpcrdma_qp_async_error_upcall
xprtrdma: Simplify RPC wake-ups on connect
...
The newly introduced gss_seq_send64_fetch_and_inc() fails to build on
32-bit architectures:
net/sunrpc/auth_gss/gss_krb5_seal.c:144:14: note: in expansion of macro 'cmpxchg'
seq_send = cmpxchg(&ctx->seq_send64, old, old + 1);
^~~~~~~
arch/x86/include/asm/cmpxchg.h:128:3: error: call to '__cmpxchg_wrong_size' declared with attribute error: Bad argument size for cmpxchg
__cmpxchg_wrong_size(); \
As the message tells us, cmpxchg() cannot be used on 64-bit arguments,
that's what cmpxchg64() does.
Fixes: 571ed1fd2390 ("SUNRPC: Replace krb5_seq_lock with a lockless scheme")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Avoid taking the global auth_domain_lock in most lookups of the auth domain
by adding an RCU protected lookup.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
If the RPC call relies on the receive call allocating pages as buffers,
then let's label it so that we
a) Don't leak memory by allocating pages for requests that do not expect
this behaviour
b) Can optimise for the common case where calls do not require allocation.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If a message has been encoded using RPCSEC_GSS, the server is
maintaining a window of sequence numbers that it considers valid.
The client should normally be tracking that window, and needs to
verify that the sequence number used by the message being transmitted
still lies inside the window of validity.
So far, we've been able to assume this condition would be realised
automatically, since the client has been encoding the message only
after taking the socket lock. Once we change that condition, we
will need the explicit check.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
In the quest to remove all stack VLA usage from the kernel[1], this
replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage
with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(),
which uses a fixed stack size.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Stable bufixes:
- v3.17+: Fix an off-by-one in bl_map_stripe()
- v4.9+: NFSv4 client live hangs after live data migration recovery
- v4.18+: xprtrdma: Fix disconnect regression
- v4.14+: Fix locking in pnfs_generic_recover_commit_reqs
- v4.9+: Fix a sleep in atomic context in nfs4_callback_sequence()
Features:
- Add support for asynchronous server-side COPY operations
Other bugfixes and cleanups:
- Optitmizations and fixes involving NFS v4.1 / pNFS layout handling
- Optimize lseek(fd, SEEK_CUR, 0) on directories to avoid locking
- Immediately reschedule writeback when the server replies with an error
- Fix excessive attribute revalidation in nfs_execute_ok()
- Add error checking to nfs_idmap_prepare_message()
- Use new vm_fault_t return type
- Return a delegation when reclaiming one that the server has recalled
- Referrals should inherit proto setting from parents
- Make rpc_auth_create_args a const
- Improvements to rpc_iostats tracking
- Fix a potential reference leak when there is an error processing a callback
- Fix rmdir / mkdir / rename nlink accounting
- Fix updating inode change attribute
- Fix error handling in nfsn4_sp4_select_mode()
- Use an appropriate work queue for direct-write completion
- Don't busy wait if NFSv4 session draining is interrupted
-----BEGIN PGP SIGNATURE-----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=8+9t
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client updates from Anna Schumaker:
"These patches include adding async support for the v4.2 COPY
operation. I think Bruce is planning to send the server patches for
the next release, but I figured we could get the client side out of
the way now since it's been in my tree for a while. This shouldn't
cause any problems, since the server will still respond with
synchronous copies even if the client requests async.
Features:
- Add support for asynchronous server-side COPY operations
Stable bufixes:
- Fix an off-by-one in bl_map_stripe() (v3.17+)
- NFSv4 client live hangs after live data migration recovery (v4.9+)
- xprtrdma: Fix disconnect regression (v4.18+)
- Fix locking in pnfs_generic_recover_commit_reqs (v4.14+)
- Fix a sleep in atomic context in nfs4_callback_sequence() (v4.9+)
Other bugfixes and cleanups:
- Optimizations and fixes involving NFS v4.1 / pNFS layout handling
- Optimize lseek(fd, SEEK_CUR, 0) on directories to avoid locking
- Immediately reschedule writeback when the server replies with an
error
- Fix excessive attribute revalidation in nfs_execute_ok()
- Add error checking to nfs_idmap_prepare_message()
- Use new vm_fault_t return type
- Return a delegation when reclaiming one that the server has
recalled
- Referrals should inherit proto setting from parents
- Make rpc_auth_create_args a const
- Improvements to rpc_iostats tracking
- Fix a potential reference leak when there is an error processing a
callback
- Fix rmdir / mkdir / rename nlink accounting
- Fix updating inode change attribute
- Fix error handling in nfsn4_sp4_select_mode()
- Use an appropriate work queue for direct-write completion
- Don't busy wait if NFSv4 session draining is interrupted"
* tag 'nfs-for-4.19-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (54 commits)
pNFS: Remove unwanted optimisation of layoutget
pNFS/flexfiles: ff_layout_pg_init_read should exit on error
pNFS: Treat RECALLCONFLICT like DELAY...
pNFS: When updating the stateid in layoutreturn, also update the recall range
NFSv4: Fix a sleep in atomic context in nfs4_callback_sequence()
NFSv4: Fix locking in pnfs_generic_recover_commit_reqs
NFSv4: Fix a typo in nfs4_init_channel_attrs()
NFSv4: Don't busy wait if NFSv4 session draining is interrupted
NFS recover from destination server reboot for copies
NFS add a simple sync nfs4_proc_commit after async COPY
NFS handle COPY ERR_OFFLOAD_NO_REQS
NFS send OFFLOAD_CANCEL when COPY killed
NFS export nfs4_async_handle_error
NFS handle COPY reply CB_OFFLOAD call race
NFS add support for asynchronous COPY
NFS COPY xdr handle async reply
NFS OFFLOAD_CANCEL xdr
NFS CB_OFFLOAD xdr
NFS: Use an appropriate work queue for direct-write completion
NFSv4: Fix error handling in nfs4_sp4_select_mode()
...
missing Chuck's fixes for the problem with callbacks over GSS from
multi-homed servers, and a smaller fix from Laura Abbott.
-----BEGIN PGP SIGNATURE-----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=JnLK
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.19-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Chuck Lever fixed a problem with NFSv4.0 callbacks over GSS from
multi-homed servers.
The only new feature is a minor bit of protocol (change_attr_type)
which the client doesn't even use yet.
Other than that, various bugfixes and cleanup"
* tag 'nfsd-4.19-1' of git://linux-nfs.org/~bfields/linux: (27 commits)
sunrpc: Add comment defining gssd upcall API keywords
nfsd: Remove callback_cred
nfsd: Use correct credential for NFSv4.0 callback with GSS
sunrpc: Extract target name into svc_cred
sunrpc: Enable the kernel to specify the hostname part of service principals
sunrpc: Don't use stack buffer with scatterlist
rpc: remove unneeded variable 'ret' in rdma_listen_handler
nfsd: use true and false for boolean values
nfsd: constify write_op[]
fs/nfsd: Delete invalid assignment statements in nfsd4_decode_exchange_id
NFSD: Handle full-length symlinks
NFSD: Refactor the generic write vector fill helper
svcrdma: Clean up Read chunk path
svcrdma: Avoid releasing a page in svc_xprt_release()
nfsd: Mark expected switch fall-through
sunrpc: remove redundant variables 'checksumlen','blocksize' and 'data'
nfsd: fix leaked file lock with nfs exported overlayfs
nfsd: don't advertise a SCSI layout for an unsupported request_queue
nfsd: fix corrupted reply to badly ordered compound
nfsd: clarify check_op_ordering
...
During review, it was found that the target, service, and srchost
keywords are easily conflated. Add an explainer.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
NFSv4.0 callback needs to know the GSS target name the client used
when it established its lease. That information is available from
the GSS context created by gssproxy. Make it available in each
svc_cred.
Note this will also give us access to the real target service
principal name (which is typically "nfs", but spec does not require
that).
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
A multi-homed NFS server may have more than one "nfs" key in its
keytab. Enable the kernel to pick the key it wants as a machine
credential when establishing a GSS context.
This is useful for GSS-protected NFSv4.0 callbacks, which are
required by RFC 7530 S3.3.3 to use the same principal as the service
principal the client used when establishing its lease.
A complementary modification to rpc.gssd is required to fully enable
this feature.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Variables 'checksumlen','blocksize' and 'data' are being assigned,
but are never used, hence they are redundant and can be removed.
Fix the following warning:
net/sunrpc/auth_gss/gss_krb5_wrap.c:443:7: warning: variable ‘blocksize’ set but not used [-Wunused-but-set-variable]
net/sunrpc/auth_gss/gss_krb5_crypto.c:376:15: warning: variable ‘checksumlen’ set but not used [-Wunused-but-set-variable]
net/sunrpc/xprtrdma/svc_rdma.c:97:9: warning: variable ‘data’ set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
These semicolons are not needed. Just remove them.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove trailing whitespace and blank line at EOF
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This turns rpc_auth_create_args into a const as it gets passed through the
auth stack.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
- Additional struct_size() conversions (Matthew, Kees)
- Explicitly reported overflow fixes (Silvio, Kees)
- Add missing kvcalloc() function (Kees)
- Treewide conversions of allocators to use either 2-factor argument
variant when available, or array_size() and array3_size() as needed (Kees)
-----BEGIN PGP SIGNATURE-----
Comment: Kees Cook <kees@outflux.net>
iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAlsgVtMWHGtlZXNjb29r
QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJhsJEACLYe2EbwLFJz7emOT1KUGK5R1b
oVxJog0893WyMqgk9XBlA2lvTBRBYzR3tzsadfYo87L3VOBzazUv0YZaweJb65sF
bAvxW3nY06brhKKwTRed1PrMa1iG9R63WISnNAuZAq7+79mN6YgW4G6YSAEF9lW7
oPJoPw93YxcI8JcG+dA8BC9w7pJFKooZH4gvLUSUNl5XKr8Ru5YnWcV8F+8M4vZI
EJtXFmdlmxAledUPxTSCIojO8m/tNOjYTreBJt9K1DXKY6UcgAdhk75TRLEsp38P
fPvMigYQpBDnYz2pi9ourTgvZLkffK1OBZ46PPt8BgUZVf70D6CBg10vK47KO6N2
zreloxkMTrz5XohyjfNjYFRkyyuwV2sSVrRJqF4dpyJ4NJQRjvyywxIP4Myifwlb
ONipCM1EjvQjaEUbdcqKgvlooMdhcyxfshqJWjHzXB6BL22uPzq5jHXXugz8/ol8
tOSM2FuJ2sBLQso+szhisxtMd11PihzIZK9BfxEG3du+/hlI+2XgN7hnmlXuA2k3
BUW6BSDhab41HNd6pp50bDJnL0uKPWyFC6hqSNZw+GOIb46jfFcQqnCB3VZGCwj3
LH53Be1XlUrttc/NrtkvVhm4bdxtfsp4F7nsPFNDuHvYNkalAVoC3An0BzOibtkh
AtfvEeaPHaOyD8/h2Q==
=zUUp
-----END PGP SIGNATURE-----
Merge tag 'overflow-v4.18-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull more overflow updates from Kees Cook:
"The rest of the overflow changes for v4.18-rc1.
This includes the explicit overflow fixes from Silvio, further
struct_size() conversions from Matthew, and a bug fix from Dan.
But the bulk of it is the treewide conversions to use either the
2-factor argument allocators (e.g. kmalloc(a * b, ...) into
kmalloc_array(a, b, ...) or the array_size() macros (e.g. vmalloc(a *
b) into vmalloc(array_size(a, b)).
Coccinelle was fighting me on several fronts, so I've done a bunch of
manual whitespace updates in the patches as well.
Summary:
- Error path bug fix for overflow tests (Dan)
- Additional struct_size() conversions (Matthew, Kees)
- Explicitly reported overflow fixes (Silvio, Kees)
- Add missing kvcalloc() function (Kees)
- Treewide conversions of allocators to use either 2-factor argument
variant when available, or array_size() and array3_size() as needed
(Kees)"
* tag 'overflow-v4.18-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (26 commits)
treewide: Use array_size in f2fs_kvzalloc()
treewide: Use array_size() in f2fs_kzalloc()
treewide: Use array_size() in f2fs_kmalloc()
treewide: Use array_size() in sock_kmalloc()
treewide: Use array_size() in kvzalloc_node()
treewide: Use array_size() in vzalloc_node()
treewide: Use array_size() in vzalloc()
treewide: Use array_size() in vmalloc()
treewide: devm_kzalloc() -> devm_kcalloc()
treewide: devm_kmalloc() -> devm_kmalloc_array()
treewide: kvzalloc() -> kvcalloc()
treewide: kvmalloc() -> kvmalloc_array()
treewide: kzalloc_node() -> kcalloc_node()
treewide: kzalloc() -> kcalloc()
treewide: kmalloc() -> kmalloc_array()
mm: Introduce kvcalloc()
video: uvesafb: Fix integer overflow in allocation
UBIFS: Fix potential integer overflow in allocation
leds: Use struct_size() in allocation
Convert intel uncore to struct_size
...
There is a 16-byte memory leak inside sunrpc/auth_gss on an nfs server when
a client mounts with 'sec=krb5' in a simple mount / umount loop. The leak
is seen by either monitoring the kmalloc-16 slab or with kmemleak enabled
unreferenced object 0xffff92e6a045f030 (size 16):
comm "nfsd", pid 1096, jiffies 4294936658 (age 761.110s)
hex dump (first 16 bytes):
2a 86 48 86 f7 12 01 02 02 00 00 00 00 00 00 00 *.H.............
backtrace:
[<000000004b2b79a7>] gssx_dec_buffer+0x79/0x90 [auth_rpcgss]
[<000000002610ac1a>] gssx_dec_accept_sec_context+0x215/0x6dd [auth_rpcgss]
[<000000004fd0e81d>] rpcauth_unwrap_resp+0xa9/0xe0 [sunrpc]
[<000000002b099233>] call_decode+0x1e9/0x840 [sunrpc]
[<00000000954fc846>] __rpc_execute+0x80/0x3f0 [sunrpc]
[<00000000c83a961c>] rpc_run_task+0x10d/0x150 [sunrpc]
[<000000002c2cdcd2>] rpc_call_sync+0x4d/0xa0 [sunrpc]
[<000000000b74eea2>] gssp_accept_sec_context_upcall+0x196/0x470 [auth_rpcgss]
[<000000003271273f>] svcauth_gss_proxy_init+0x188/0x520 [auth_rpcgss]
[<000000001cf69f01>] svcauth_gss_accept+0x3a6/0xb50 [auth_rpcgss]
If you map the above to code you'll see the following call chain
gssx_dec_accept_sec_context
gssx_dec_ctx (missing from kmemleak output)
gssx_dec_buffer(xdr, &ctx->mech)
Inside gssx_dec_buffer there is 'kmemdup' where we allocate memory for
any gssx_buffer (buf) and store into buf->data. In the above instance,
'buf == &ctx->mech).
Further up in the chain in gssp_accept_sec_context_upcall we see ctx->mech
is part of a stack variable 'struct gssx_ctx rctxh'. Now later inside
gssp_accept_sec_context_upcall after gssp_call, there is a number of
memcpy and kfree statements, but there is no kfree(rctxh.mech.data)
after the memcpy into data->mech_oid.data.
With this patch applied and the same mount / unmount loop, the kmalloc-16
slab is stable and kmemleak enabled no longer shows the above backtrace.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
server xdr decoding (with an eye towards eliminating a data copy in the
RDMA case).
I did some refactoring of the delegation code in preparation for
eliminating some delegation self-conflicts and implementing write
delegations.
-----BEGIN PGP SIGNATURE-----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=fJI1
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.17' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Chuck Lever did a bunch of work on nfsd tracepoints, on RDMA, and on
server xdr decoding (with an eye towards eliminating a data copy in
the RDMA case).
I did some refactoring of the delegation code in preparation for
eliminating some delegation self-conflicts and implementing write
delegations"
* tag 'nfsd-4.17' of git://linux-nfs.org/~bfields/linux: (40 commits)
nfsd: fix incorrect umasks
sunrpc: remove incorrect HMAC request initialization
NFSD: Clean up legacy NFS SYMLINK argument XDR decoders
NFSD: Clean up legacy NFS WRITE argument XDR decoders
nfsd: Trace NFSv4 COMPOUND execution
nfsd: Add I/O trace points in the NFSv4 read proc
nfsd: Add I/O trace points in the NFSv4 write path
nfsd: Add "nfsd_" to trace point names
nfsd: Record request byte count, not count of vectors
nfsd: Fix NFSD trace points
svc: Report xprt dequeue latency
sunrpc: Report per-RPC execution stats
sunrpc: Re-purpose trace_svc_process
sunrpc: Save remote presentation address in svc_xprt for trace events
sunrpc: Simplify trace_svc_recv
sunrpc: Simplify do_enqueue tracing
sunrpc: Move trace_svc_xprt_dequeue()
sunrpc: Update show_svc_xprt_flags() to include recently added flags
svc: Simplify ->xpo_secure_port
sunrpc: Remove unneeded pointer dereference
...
make_checksum_hmac_md5() is allocating an HMAC transform and doing
crypto API calls in the following order:
crypto_ahash_init()
crypto_ahash_setkey()
crypto_ahash_digest()
This is wrong because it makes no sense to init() the request before a
key has been set, given that the initial state depends on the key. And
digest() is short for init() + update() + final(), so in this case
there's no need to explicitly call init() at all.
Before commit 9fa68f620041 ("crypto: hash - prevent using keyed hashes
without setting key") the extra init() had no real effect, at least for
the software HMAC implementation. (There are also hardware drivers that
implement HMAC-MD5, and it's not immediately obvious how gracefully they
handle init() before setkey().) But now the crypto API detects this
incorrect initialization and returns -ENOKEY. This is breaking NFS
mounts in some cases.
Fix it by removing the incorrect call to crypto_ahash_init().
Reported-by: Michael Young <m.a.young@durham.ac.uk>
Fixes: 9fa68f620041 ("crypto: hash - prevent using keyed hashes without setting key")
Fixes: fffdaef2eb4a ("gss_krb5: Add support for rc4-hmac encryption")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Synchronous pernet_operations are not allowed anymore.
All are asynchronous. So, drop the structure member.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
These pernet_operations initialize and destroy sunrpc_net_id
refered per-net items. Only used global list is cache_list,
and accesses already serialized.
sunrpc_destroy_cache_detail() check for list_empty() without
cache_list_lock, but when it's called from unregister_pernet_subsys(),
there can't be callers in parallel, so we won't miss list_empty()
in this case.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Anna Schumaker <Anna.Schumaker@netapp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Prefer the direct use of octal for permissions.
Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace
and some typing.
Miscellanea:
o Whitespace neatening around these conversions.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix unaligned access in gss_{get,verify}_mic_v2() on sparc64
Signed-off-by: James Ettle <james@ettle.org.uk>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
In testing, we found that nfsd threads may call set_groups in parallel
for the same entry cached in auth.unix.gid, racing in the call of
groups_sort, corrupting the groups for that entry and leading to
permission denials for the client.
This patch:
- Make groups_sort globally visible.
- Move the call to groups_sort to the modifiers of group_info
- Remove the call to groups_sort from set_groups
Link: http://lkml.kernel.org/r/20171211151420.18655-1-thiago.becker@gmail.com
Signed-off-by: Thiago Rafael Becker <thiago.becker@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Acked-by: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Make these const as they are only getting passed to the function
cache_create_net having the argument as const.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
- fix a number of races in the NFSv4+ state code.
- fix some shutdown crashes in multiple-network-namespace cases.
- relax our 4.1 session limits; if you've an artificially low limit
to the number of 4.1 clients that can mount simultaneously, try
upgrading.
-----BEGIN PGP SIGNATURE-----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=PBs+
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.15' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Lots of good bugfixes, including:
- fix a number of races in the NFSv4+ state code
- fix some shutdown crashes in multiple-network-namespace cases
- relax our 4.1 session limits; if you've an artificially low limit
to the number of 4.1 clients that can mount simultaneously, try
upgrading"
* tag 'nfsd-4.15' of git://linux-nfs.org/~bfields/linux: (22 commits)
SUNRPC: Improve ordering of transport processing
nfsd: deal with revoked delegations appropriately
svcrdma: Enqueue after setting XPT_CLOSE in completion handlers
nfsd: use nfs->ns.inum as net ID
rpc: remove some BUG()s
svcrdma: Preserve CB send buffer across retransmits
nfds: avoid gettimeofday for nfssvc_boot time
fs, nfsd: convert nfs4_file.fi_ref from atomic_t to refcount_t
fs, nfsd: convert nfs4_cntl_odstate.co_odcount from atomic_t to refcount_t
fs, nfsd: convert nfs4_stid.sc_count from atomic_t to refcount_t
lockd: double unregister of inetaddr notifiers
nfsd4: catch some false session retries
nfsd4: fix cached replies to solo SEQUENCE compounds
sunrcp: make function _svc_create_xprt static
SUNRPC: Fix tracepoint storage issues with svc_recv and svc_rqst_status
nfsd: use ARRAY_SIZE
nfsd: give out fewer session slots as limit approaches
nfsd: increase DRC cache limit
nfsd: remove unnecessary nofilehandle checks
nfs_common: convert int to bool
...
