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Userspace should be able to monitor nfsd/clients/ to see when clients
come and go, but we're failing to send fsnotify events.
Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
It's normal for a client to test a stateid from a previous instance,
e.g. after a network partition.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
It's meant to be write-only.
Fixes: 89c905becc ("nfsd: allow forced expiration of NFSv4 clients")
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
yuehaibing@huawei.com reports the following build errors arise when
CONFIG_NFSD_V4_2_INTER_SSC is set and the NFS client is not built
into the kernel:
fs/nfsd/nfs4proc.o: In function `nfsd4_do_copy':
nfs4proc.c:(.text+0x23b7): undefined reference to `nfs42_ssc_close'
fs/nfsd/nfs4proc.o: In function `nfsd4_copy':
nfs4proc.c:(.text+0x5d2a): undefined reference to `nfs_sb_deactive'
fs/nfsd/nfs4proc.o: In function `nfsd4_do_async_copy':
nfs4proc.c:(.text+0x61d5): undefined reference to `nfs42_ssc_open'
nfs4proc.c:(.text+0x6389): undefined reference to `nfs_sb_deactive'
The new inter-server copy code invokes client functions. Until the
NFS server has infrastructure to load the appropriate NFS client
modules to handle inter-server copy requests, let's constrain the
way this feature is built.
Reported-by: YueHaibing <yuehaibing@huawei.com>
Fixes: ce0887ac96 ("NFSD add nfs4 inter ssc to nfsd4_copy")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: YueHaibing <yuehaibing@huawei.com> # build-tested
If the rpc.mountd daemon goes down, then that should not cause all
exports to start failing with ESTALE errors. Let's explicitly
distinguish between the cache upcall cases that need to time out,
and those that do not.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Add tracing to allow us to figure out where any stale filehandle issues
may be originating from.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
In NFSv4, the lock stateids are tied to the lockowner, and the open stateid,
so that the action of closing the file also results in either an automatic
loss of the locks, or an error of the form NFS4ERR_LOCKS_HELD.
In practice this means we must not add new locks to the open stateid
after the close process has been invoked. In fact doing so, can result
in the following panic:
kernel BUG at lib/list_debug.c:51!
invalid opcode: 0000 [#1] SMP NOPTI
CPU: 2 PID: 1085 Comm: nfsd Not tainted 5.6.0-rc3+ #2
Hardware name: VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS VMW71.00V.14410784.B64.1908150010 08/15/2019
RIP: 0010:__list_del_entry_valid.cold+0x31/0x55
Code: 1a 3d 9b e8 74 10 c2 ff 0f 0b 48 c7 c7 f0 1a 3d 9b e8 66 10 c2 ff 0f 0b 48 89 f2 48 89 fe 48 c7 c7 b0 1a 3d 9b e8 52 10 c2 ff <0f> 0b 48 89 fe 4c 89 c2 48 c7 c7 78 1a 3d 9b e8 3e 10 c2 ff 0f 0b
RSP: 0018:ffffb296c1d47d90 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff8ba032456ec8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8ba039e99cc8 RDI: ffff8ba039e99cc8
RBP: ffff8ba032456e60 R08: 0000000000000781 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8ba009a4abe0
R13: ffff8ba032456e8c R14: 0000000000000000 R15: ffff8ba00adb01d8
FS: 0000000000000000(0000) GS:ffff8ba039e80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb213f0b008 CR3: 00000001347de006 CR4: 00000000003606e0
Call Trace:
release_lock_stateid+0x2b/0x80 [nfsd]
nfsd4_free_stateid+0x1e9/0x210 [nfsd]
nfsd4_proc_compound+0x414/0x700 [nfsd]
? nfs4svc_decode_compoundargs+0x407/0x4c0 [nfsd]
nfsd_dispatch+0xc1/0x200 [nfsd]
svc_process_common+0x476/0x6f0 [sunrpc]
? svc_sock_secure_port+0x12/0x30 [sunrpc]
? svc_recv+0x313/0x9c0 [sunrpc]
? nfsd_svc+0x2d0/0x2d0 [nfsd]
svc_process+0xd4/0x110 [sunrpc]
nfsd+0xe3/0x140 [nfsd]
kthread+0xf9/0x130
? nfsd_destroy+0x50/0x50 [nfsd]
? kthread_park+0x90/0x90
ret_from_fork+0x1f/0x40
The fix is to ensure that lock creation tests for whether or not the
open stateid is unhashed, and to fail if that is the case.
Fixes: 659aefb68e ("nfsd: Ensure we don't recognise lock stateids after freeing them")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
svcrdma expects that the payload falls precisely into the xdr_buf
page vector. This does not seem to be the case for
nfsd4_encode_readv().
This code is called only when fops->splice_read is missing or when
RQ_SPLICE_OK is clear, so it's not a noticeable problem in many
common cases.
Add new transport method: ->xpo_read_payload so that when a READ
payload does not fit exactly in rq_res's page vector, the XDR
encoder can inform the RPC transport exactly where that payload is,
without the payload's XDR pad.
That way, when a Write chunk is present, the transport knows what
byte range in the Reply message is supposed to be matched with the
chunk.
Note that the Linux NFS server implementation of NFS/RDMA can
currently handle only one Write chunk per RPC-over-RDMA message.
This simplifies the implementation of this fix.
Fixes: b042098063 ("nfsd4: allow exotic read compounds")
Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=198053
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
list_for_each_entry_rcu() has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled
by default.
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
list_for_each_entry_rcu() has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled
by default.
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Currently, nfsd4_encode_exchange_id() encodes the utsname nodename
string in the server_scope field. In a multi-host container
environemnt, if an nfsd container is restarted on a different host than
it was originally running on, clients will see a server_scope mismatch
and will not attempt to reclaim opens.
Instead, set the server_scope while we're in a process context during
service startup, so we get the utsname nodename of the current process
and store that in nfsd_net.
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
[bfields: fix up major_id too]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
- Server-to-server copy code from Olga. To use it, client and
both servers must have support, the target server must be able
to access the source server over NFSv4.2, and the target
server must have the inter_copy_offload_enable module
parameter set.
- Improvements and bugfixes for the new filehandle cache,
especially in the container case, from Trond
- Also from Trond, better reporting of write errors.
- Y2038 work from Arnd.
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Merge tag 'nfsd-5.6' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Highlights:
- Server-to-server copy code from Olga.
To use it, client and both servers must have support, the target
server must be able to access the source server over NFSv4.2, and
the target server must have the inter_copy_offload_enable module
parameter set.
- Improvements and bugfixes for the new filehandle cache, especially
in the container case, from Trond
- Also from Trond, better reporting of write errors.
- Y2038 work from Arnd"
* tag 'nfsd-5.6' of git://linux-nfs.org/~bfields/linux: (55 commits)
sunrpc: expiry_time should be seconds not timeval
nfsd: make nfsd_filecache_wq variable static
nfsd4: fix double free in nfsd4_do_async_copy()
nfsd: convert file cache to use over/underflow safe refcount
nfsd: Define the file access mode enum for tracing
nfsd: Fix a perf warning
nfsd: Ensure sampling of the write verifier is atomic with the write
nfsd: Ensure sampling of the commit verifier is atomic with the commit
sunrpc: clean up cache entry add/remove from hashtable
sunrpc: Fix potential leaks in sunrpc_cache_unhash()
nfsd: Ensure exclusion between CLONE and WRITE errors
nfsd: Pass the nfsd_file as arguments to nfsd4_clone_file_range()
nfsd: Update the boot verifier on stable writes too.
nfsd: Fix stable writes
nfsd: Allow nfsd_vfs_write() to take the nfsd_file as an argument
nfsd: Fix a soft lockup race in nfsd_file_mark_find_or_create()
nfsd: Reduce the number of calls to nfsd_file_gc()
nfsd: Schedule the laundrette regularly irrespective of file errors
nfsd: Remove unused constant NFSD_FILE_LRU_RESCAN
nfsd: Containerise filecache laundrette
...
Fix sparse warning:
fs/nfsd/filecache.c:55:25: warning:
symbol 'nfsd_filecache_wq' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This frees "copy->nf_src" before and again after the goto.
Fixes: ce0887ac96 ("NFSD add nfs4 inter ssc to nfsd4_copy")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Use the 'refcount_t' type instead of 'atomic_t' for improved
refcounting safety.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
perf does not know how to deal with a __builtin_bswap32() call, and
complains. All other functions just store the xid etc in host endian
form, so let's do that in the tracepoint for nfsd_file_acquire too.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
When doing an unstable write, we need to ensure that we sample the
write verifier before releasing the lock, and allowing a commit to
the same file to proceed.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
When we have a successful commit, ensure we sample the commit verifier
before releasing the lock.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Ensure that we can distinguish between synchronous CLONE and
WRITE errors, and that we can assign them correctly.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Needed in order to fix exclusion w.r.t. writes.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
We don't know if the error returned by the fsync() call is
exclusive to the data written by the stable write, so play it
safe.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Strictly speaking, a stable write error needs to reflect the
write + the commit of that write (and only that write). To
ensure that we don't pick up the write errors from other
writebacks, add a rw_semaphore to provide exclusion.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Needed in order to fix stable writes.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
If nfsd_file_mark_find_or_create() keeps winning the race for the
nfsd_file_fsnotify_group->mark_mutex against nfsd_file_mark_put()
then it can soft lock up, since fsnotify_add_inode_mark() ends
up always finding an existing entry.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Don't call nfsd_file_gc() on every put of the reference in nfsd_file_put().
Instead, do it only when we're expecting the refcount to go to 1.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Emsure we schedule the laundrette even if the struct file is carrying
file errors.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Ensure that if the filecache laundrette gets stuck, it only affects
the knfsd instances of one container.
The notifier callbacks can be called from various contexts so avoid
using synchonous filesystem operations that might deadlock.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
If the lookup keeps finding a nfsd_file with an unhashed open file,
then retry once only.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org
Fixes: 65294c1f2c "nfsd: add a new struct file caching facility to nfsd"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Fixes coccicheck warning:
fs/nfsd/nfssvc.c:394:2-14: WARNING: Assignment of 0/1 to bool variable
fs/nfsd/nfssvc.c:407:2-14: WARNING: Assignment of 0/1 to bool variable
fs/nfsd/nfssvc.c:422:2-14: WARNING: Assignment of 0/1 to bool variable
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Fixes coccicheck warning:
fs/nfsd/nfs4proc.c:235:1-18: WARNING: Assignment of 0/1 to bool variable
fs/nfsd/nfs4proc.c:368:1-17: WARNING: Assignment of 0/1 to bool variable
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Fixes coccicheck warning:
fs/nfsd/vfs.c:1389:5-13: WARNING: Assignment of 0/1 to bool variable
fs/nfsd/vfs.c:1398:5-13: WARNING: Assignment of 0/1 to bool variable
fs/nfsd/vfs.c:1415:2-10: WARNING: Assignment of 0/1 to bool variable
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The function was removed a long time ago, but the declaration
and a dummy implementation are still there, referencing the
deprecated time_t type.
Remove both.
Fixes: f958a1320f ("nfsd4: remove unnecessary lease-setting function")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
gen_confirm() generates a unique identifier based on the current
time. This overflows in year 2038, but that is harmless since it
generally does not lead to duplicates, as long as the time has
been initialized by a real-time clock or NTP.
Using ktime_get_boottime_seconds() or ktime_get_seconds() would
avoid the overflow, but it would be more likely to result in
non-unique numbers.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
A couple of time_t variables are only used to track the state of the
lease time and its expiration. The code correctly uses the 'time_after()'
macro to make this work on 32-bit architectures even beyond year 2038,
but the get_seconds() function and the time_t type itself are deprecated
as they behave inconsistently between 32-bit and 64-bit architectures
and often lead to code that is not y2038 safe.
As a minor issue, using get_seconds() leads to problems with concurrent
settimeofday() or clock_settime() calls, in the worst case timeout never
triggering after the time has been set backwards.
Change nfsd to use time64_t and ktime_get_boottime_seconds() here. This
is clearly excessive, as boottime by itself means we never go beyond 32
bits, but it does mean we handle this correctly and consistently without
having to worry about corner cases and should be no more expensive than
the previous implementation on 64-bit architectures.
The max_cb_time() function gets changed in order to avoid an expensive
64-bit division operation, but as the lease time is at most one hour,
there is no change in behavior.
Also do the same for server-to-server copy expiration time.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[bfields@redhat.com: fix up copy expiration]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The nfsd4_blocked_lock->nbl_time timestamp is recorded in jiffies,
but then compared to a CLOCK_REALTIME timestamp later on, which makes
no sense.
For consistency with the other timestamps, change this to use a time_t.
This is a change in behavior, which may cause regressions, but the
current code is not sensible. On a system with CONFIG_HZ=1000,
the 'time_after((unsigned long)nbl->nbl_time, (unsigned long)cutoff))'
check is false for roughly the first 18 days of uptime and then true
for the next 49 days.
Fixes: 7919d0a27f ("nfsd: add a LRU list for blocked locks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The nfsd4_cb_layout_done() function takes a 'time_t' value,
multiplied by NSEC_PER_SEC*2 to get a nanosecond value.
This works fine on 64-bit architectures, but on 32-bit, any
value over 1 second results in a signed integer overflow
with unexpected results.
Cast one input to a 64-bit type in order to produce the
same result that we have on 64-bit architectures, regarless
of the type of nfsd4_lease.
Fixes: 6b9b21073d ("nfsd: give up on CB_LAYOUTRECALLs after two lease periods")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Change to time64_t and ktime_get_real_seconds() to make the
logic work correctly on 32-bit architectures beyond 2038.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Guardtime handling in nfs3 differs between 32-bit and 64-bit
architectures, and uses the deprecated time_t type.
Change it to using time64_t, which behaves the same way on
64-bit and 32-bit architectures, treating the number as an
unsigned 32-bit entity with a range of year 1970 to 2106
consistently, and avoiding the y2038 overflow.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The local boot time variable gets truncated to time_t at the moment,
which can lead to slightly odd behavior on 32-bit architectures.
Use ktime_get_real_seconds() instead of get_seconds() to always
get a 64-bit result, and keep it that way wherever possible.
It still gets truncated in a few places:
- When assigning to cl_clientid.cl_boot, this is already documented
and is only used as a unique identifier.
- In clients_still_reclaiming(), the truncation is to 'unsigned long'
in order to use the 'time_before() helper.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The values in encode_time_delta are always small and don't
overflow the range of 'struct timespec', so changing it has
no effect.
Change it to timespec64 as a prerequisite for removing the
timespec definition later.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The decode_time3 function behaves differently on 32-bit
and 64-bit architectures: on the former, a 32-bit timestamp
gets converted into an signed number and then into a timestamp
between 1902 and 2038, while on the latter it is interpreted
as unsigned in the range 1970-2106.
Change all the remaining 'timespec' in nfsd to 'timespec64'
to make the behavior the same, and use the current interpretation
of the dominant 64-bit architectures.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The nii_time field gets truncated to 'time_t' on 32-bit architectures
before printing.
Remove the use of 'struct timespec' to product the correct output
beyond 2038.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The delegation logic in nfsd uses the somewhat inefficient
seconds_since_boot() function to record time intervals.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
