(opens, locks, etc) is retained, which I believe is correct behaviour.
However, for NFSv4.1, the server also retained a reference to the xprt
(RPC transport socket structure) for the backchannel. This caused
svcpool_destroy() to not call SVC_DESTROY() for the xprt and allowed
a socket upcall to occur after the mutexes in the svcpool were destroyed,
causing a crash.
This patch fixes the code so that the backchannel xprt structure is
dereferenced just before svcpool_destroy() is called, so the code
does do an SVC_DESTROY() on the xprt, which shuts down the socket upcall.
Tested by: g_amanakis@yahoo.com
PR: 204340
MFC after: 2 weeks
that already has a confirmed ClientID, the nfsrv_setclient() function would
not fill in the clientidp being returned. As such, the value of ClientID
returned would be whatever garbage was on the stack.
An NFSv4.1 client would not normally do this, but it appears that it can
happen for certain Linux clients. When it happens, the client persistently
retries the ExchangeID and Create_session after Create_session fails when
it uses the bogus clientid. With this patch, the correct clientid is replied.
This problem was identified in a packet trace supplied by
Ahmed Kamal via email.
Reported by: email.ahmedkamal@googlemail.com
MFC after: 2 weeks
unconfirmed clientid structure for the same client on the last hash list,
this old entry would not be removed/deleted. I do not think this bug would have
caused serious problems, since the new entry would have been before the old one
on the list. This old entry would have eventually been scavenged/removed.
Detected while reading the code looking for another bug.
MFC after: 3 days
No appreciable change in performance was observed after increasing
the sizes of these tables and then testing with a single client.
However, there was an email that indicated high CPU overheads for
a heavily loaded NFSv4 and it is hoped that increasing the sizes
of the hash tables via these tunables might help.
The tables remain the same size by default.
Differential Revision: https://reviews.freebsd.org/D2596
MFC after: 2 weeks
was reported via email. This was caused by a LOR between the
sleep lock used to serialize the local locking (nfsrv_locklf())
and locking the vnode. I believe this patch fixes the problem
by delaying relocking of the vnode until the sleep lock is
unlocked (nfsrv_unlocklf()). To avoid nfsvno_advlock() having the side
effect of unlocking the vnode, unlocking the vnode was moved to before
the functions that call nfsvno_advlock().
It shouldn't affect the execution of the default case where
vfs.nfsd.enable_locallocks=0.
Reported by: loic.blot@unix-experience.fr
Discussed with: kib
MFC after: 1 week
This fix addresses only issues with the pynfs reports, none of these
issues are know to create problems for extant real clients.
Submitted by: Bart Hsiao <bart.hsiao@gmail.com>
Reworked by: myself
Reviewed by: rmacklem
Approved by: rmacklem
Sponsored by: QNAP Systems Inc.
into head. The code is not believed to have any effect
on the semantics of non-NFSv4.1 server behaviour.
It is a rather large merge, but I am hoping that there will
not be any regressions for the NFS server.
MFC after: 1 month
This simplifies the code and should avoid the clang sparc
port from generating an abort() call.
Requested by: rdivacky
Submitted by: jhb
MFC after: 2 weeks
when a Getattr for a file is done by a client other than the one that
holds the file's delegation. This would only happen when delegations
are enabled and the problem is fixed by this patch.
MFC after: 1 week
- Use NFSD_MONOSEC (which maps to time_uptime) instead of the seconds
portion of wall-time stamps to manage timeouts on events.
- Remove unused nd_starttime from the per-request structure in the new
NFS server.
- Use nanotime() for the modification time on a delegation to get as
precise a time as possible.
- Use time_second instead of extracting the second from a call to
getmicrotime().
Submitted by: bde (3)
Reviewed by: bde, rmacklem
MFC after: 2 weeks
to head. I don't think the NFS client behaviour will change unless
the new "minorversion=1" mount option is used. It includes basic
NFSv4.1 support plus support for pNFS using the Files Layout only.
All problems detecting during an NFSv4.1 Bakeathon testing event
in June 2012 have been resolved in this code and it has been tested
against the NFSv4.1 server available to me.
Although not reviewed, I believe that kib@ has looked at it.
used, when the code should actually protect the tested
variable with a mutex. Since the tsleep()s had a 10sec
timeout, the race would have only delayed the allocation
of a new clientid for a client. The sleeps will also
rarely occur, since having a callback in progress when
a client acquires a new clientid, is unlikely.
in practice, since having a callback in progress when
a fresh clientid is being acquired by a client is unlikely.
MFC after: 1 month
Add the sysctl debug.iosize_max_clamp, enabled by default. Setting the
sysctl to zero allows to perform the SSIZE_MAX-sized i/o requests from
the usermode.
Discussed with: bde, das (previous versions)
MFC after: 1 month
the new NFSv4 server where the code follows the wrong list.
Fortunately, for these fairly rare cases, the lc_stateid[]
lists are normally empty. This patch fixes the code to
follow the correct list.
Reported by: tai.horgan at isilon.com
Discussed with: zack
MFC after: 2 weeks
Isilon has the concept of an in-memory exit-code ring that saves the last exit
code of a function and allows for stack tracing. This is very helpful when
debugging tough issues.
This patch is essentially a no-op for BSD at this point, until we upstream
the dexitcode logic itself. The patch adds DEXITCODE calls to every NFS
function that returns an errno error code. A number of code paths were also
reorganized to have single exit paths, to reduce code duplication.
Submitted by: David Kwan <dkwan@isilon.com>
Reviewed by: rmacklem
Approved by: zml (mentor)
MFC after: 2 weeks
correctly during a forced dismount. This required that
the exclusive and shared (refcnt) sleep lock functions check
for MNTK_UMOUNTF before sleeping, so that they won't block
while nfscl_umount() is getting rid of the state. As
such, a "struct mount *" argument was added to the locking
functions. I believe the only remaining case where a forced
dismount can get hung in the kernel is when a thread is
already attempting to do a TCP connect to a dead server
when the krpc client structure called nr_client is NULL.
This will only happen just after a "mount -u" with options
that force a new TCP connection is done, so it shouldn't
be a problem in practice.
MFC after: 2 weeks
the experimental NFS server, so that it doesn't leak memory
when unloaded. However, unloading the NFSv4 server is not
recommended, since all NFSv4 state will be lost by the unload
and clients will have to recover the state after a server
reload/restart as if the server crashed/rebooted.
MFC after: 2 weeks
signal to the master nfsd daemon whenever the stable restart
file has been modified. This will allow the master nfsd daemon
to maintain an up to date backup copy of the file. This is
enabled via the nfssvc() syscall, so that older nfsd daemons
will not be signaled.
Reviewed by: jhb
MFC after: 1 week
obscured vn_start_write() and vn_finished_write() for the
old OpenBSD port, since most uses have been replaced by the
correct calls.
MFC after: 12 days
experimental NFS server, to handle the case where an
exported file system is forced dismounted while an RPC
is in progress. Further commits will fix the cases where
a mount point is used when the associated vnode isn't locked.
Reviewed by: kib
MFC after: 2 weeks
experimental NFSv4 server. The first was a bogus use of VOP_ISLOCKED()
in a KASSERT() and the second was the need to lock the vnode for the
nfsrv_checkremove() call. Also, delete a "__unused" that was bogus,
since the argument is used.
Reviewed by: zack.kirsch at isilon.com
MFC after: 2 weeks
experimental NFSv4 server to a NFSv4 client when delegations are not
being issued, even if the client advertises a callback path.
This avoids a problem where a Linux client advertises a
callback path that doesn't work, due to a firewall, and then
times out an Open attempt before the FreeBSD server gives up
its callback connection attempt. (Suggested by
drb at karlov.mff.cuni.cz to fix the Linux client problem that
he reported on the fs-stable mailing list.)
The server should probably have
a 1sec timeout on callback connection attempts when there are
no delegations issued to the client, but that patch will require
changes to the krpc and this serves as a work around until then.
Tested by: drb at karlov.mff.cuni.cz
MFC after: 5 days
NFSv4 server more readable. Mostly changes to comments, but a
case of >= is changed to >, since == can never happen. Also, I've
added a couple of KASSERT()s and a slight optimization, since
once the "else if" case happens, subsequent locks in the list can't
have any effect. None of these changes fixes any known bug.
MFC after: 2 weeks
it frees local locks correctly upon close. In order for
nfsrv_localunlock() to work correctly, the lock can no longer be in
the lockowner's stateid list. As such, nfsrv_freenfslock() has to
be called before nfsrv_localunlock(), to get rid of the lock structure
on the lockowner's stateid list. This only affected operation when
local locks (vfs.newnfs.enable_locallocks=1) are enabled, which is
not the default at this time.
MFC after: 1 week
zack.kirsch at isilon.com for a race between nfsrv_freeopen()
and nfsrv_getlockfile() in the experimental NFS server that
he found during testing. Although nfsrv_freeopen() holds a
sleep lock on the lock file structure when called with
cansleep != 0, nfsrv_getlockfile() could still search the
list, once it acquired the NFSLOCKSTATE() mutex. I believe
that acquiring the mutex in nfsrv_freeopen() fixes the race.
MFC after: 2 weeks
nfsd_recalldelegation() function, since this function is called
by nfsd threads when they are handling NFSv2 or NFSv3 RPCs, where
no reference count would have been acquired.
MFC after: 2 weeks
the correct mutex when checking nfsv4root_lock. Although this
could be fixed by adding mutex lock/unlock calls, zack.kirsch at
isilon.com suggested a better fix that uses a non-blocking
acquisition of a reference count on nfsv4root_lock. This fix
allows the weird NFSLOCKSTATE(); NFSUNLOCKSTATE(); synchronization
to be deleted. This patch applies this fix.
Tested by: zack.kirsch at isilon.com
MFC after: 2 weeks
count on nfsv4rootfs_lock when dumping state, since these functions
are not called by nfsd threads. Without this reference count, it
is possible for an nfsd thread to acquire an exclusive lock on
nfsv4rootfs_lock while the dump is in progress and then change the
lists, potentially causing a crash.
Reported by: zack.kirsch at isilon.com
MFC after: 2 weeks
released a reference count on nfsv4rootfs_lock erroneously when
administrative revocation of state was done.
Submitted by: zack.kirsch at isilon.com
MFC after: 2 weeks
during the grace period after startup. This grace period must
be at least the lease duration, which is typically 1-2 minutes.
It seems prudent for the experimental NFS client to wait a few
seconds before retrying such an RPC, so that the server isn't
flooded with non-recovery RPCs during recovery. This patch adds
an argument to nfs_catnap() to implement a 5 second delay
for this case.
MFC after: 1 week
on the server for the experimental nfs server. When enabled
by setting vfs.newnfs.locallocks_enable to non-zero, the
experimental nfs server will now acquire byte range locks
on the file on behalf of NFSv4 clients, such that lock
conflicts between the NFSv4 clients and processes running
locally on the server, will be recognized and handled correctly.
MFC after: 2 weeks
was broken w.r.t. byte range lock conflicts when it was the same client
and the request used the open_to_lock_owner4 case, since lckstp->ls_clp
was not set. This patch fixes it by using "clp" instead of "lckstp->ls_clp".
MFC after: 2 weeks
NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024
and 1023 respectively. (Previously they were equal, but under a close
reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it
is the number of supplemental groups, not total number of groups.)
The bulk of the change consists of converting the struct ucred member
cr_groups from a static array to a pointer. Do the equivalent in
kinfo_proc.
Introduce new interfaces crcopysafe() and crsetgroups() for duplicating
a process credential before modifying it and for setting group lists
respectively. Both interfaces take care for the details of allocating
groups array. crsetgroups() takes care of truncating the group list
to the current maximum (NGROUPS) if necessary. In the future,
crsetgroups() may be responsible for insuring invariants such as sorting
the supplemental groups to allow groupmember() to be implemented as a
binary search.
Because we can not change struct xucred without breaking application
ABIs, we leave it alone and introduce a new XU_NGROUPS value which is
always 16 and is to be used or NGRPS as appropriate for things such as
NFS which need to use no more than 16 groups. When feasible, truncate
the group list rather than generating an error.
Minor changes:
- Reduce the number of hand rolled versions of groupmember().
- Do not assign to both cr_gid and cr_groups[0].
- Modify ipfw to cache ucreds instead of part of their contents since
they are immutable once referenced by more than one entity.
Submitted by: Isilon Systems (initial implementation)
X-MFC after: never
PR: bin/113398 kern/133867
when it runs out of clientids is reboot. I had replaced cpu_reboot()
with printf(), since cpu_reboot() doesn't exist for sparc64.
This change replaces the printf() with panic(), so the reboot
would occur for this highly unlikely occurrence.
Approved by: kib (mentor)
required two changes: setting the program and version numbers before
connect and fixing the handling of the Null Rpc case in newnfs_request().
Approved by: kib (mentor)
