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path: root/fs/nfsd/nfs4state.c
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2007-10-15Merge branch 'locks' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'locks' of git://linux-nfs.org/~bfields/linux: nfsd: remove IS_ISMNDLCK macro Rework /proc/locks via seq_files and seq_list helpers fs/locks.c: use list_for_each_entry() instead of list_for_each() NFS: clean up explicit check for mandatory locks AFS: clean up explicit check for mandatory locks 9PFS: clean up explicit check for mandatory locks GFS2: clean up explicit check for mandatory locks Cleanup macros for distinguishing mandatory locks Documentation: move locks.txt in filesystems/ locks: add warning about mandatory locking races Documentation: move mandatory locking documentation to filesystems/ locks: Fix potential OOPS in generic_setlease() Use list_first_entry in locks_wake_up_blocks locks: fix flock_lock_file() comment Memory shortage can result in inconsistent flocks state locks: kill redundant local variable locks: reverse order of posix_locks_conflict() arguments
2007-10-09Cleanup macros for distinguishing mandatory locksPavel Emelyanov
The combination of S_ISGID bit set and S_IXGRP bit unset is used to mark the inode as "mandatory lockable" and there's a macro for this check called MANDATORY_LOCK(inode). However, fs/locks.c and some filesystems still perform the explicit i_mode checking. Besides, Andrew pointed out, that this macro is buggy itself, as it dereferences the inode arg twice. Convert this macro into static inline function and switch its users to it, making the code shorter and more readable. The __mandatory_lock() helper is to be used in places where the IS_MANDLOCK() for superblock is already known to be true. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: David Howells <dhowells@redhat.com> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Latchesar Ionkov <lucho@ionkov.net> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-10-09knfsd: nfsv4 delegation recall should take reference on clientJ. Bruce Fields
It's not enough to take a reference on the delegation object itself; we need to ensure that the rpc_client won't go away just as we're about to make an rpc call. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-10-09knfsd: don't shutdown callbacks until nfsv4 client is freedJ. Bruce Fields
If a callback still holds a reference on the client, then it may be about to perform an rpc call, so it isn't safe to call rpc_shutdown(). (Though rpc_shutdown() does wait for any outstanding rpc's, it can't know if a new rpc is about to be issued with that client.) So, wait to shutdown the rpc_client until the reference count on the client has gone to zero. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-10-09knfsd: let nfsd manage timing out its own leasesJ. Bruce Fields
Currently there's a race that can cause an oops in generic_setlease. (In detail: nfsd, when it removes a lease, does so by calling vfs_setlease() with F_UNLCK and a pointer to the fl_flock field, which in turn points to nfsd's existing lease; but the first thing the setlease code does is call time_out_leases(). If the lease happens to already be beyond the lease break time, that will free the lease and (in nfsd's release_private callback) set fl_flock to NULL, leading to a NULL deference soon after in vfs_setlease().) There are probably other things to fix here too, but it seems inherently racy to allow either locks.c or nfsd to time out this lease. Instead just set the fl_break_time to 0 (preventing locks.c from ever timing out this lock) and leave it up to nfsd's laundromat thread to deal with it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-10-09knfsd: remove code duplication in nfsd4_setclientid()J. Bruce Fields
Each branch of this if-then-else has a bunch of duplicated code that we could just put at the end. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Acked-by: Neil Brown <neilb@suse.de>
2007-10-09knfsd: move nfsv4 slab creation/destruction to module init/exitJ. Bruce Fields
We have some slabs that the nfs4 server uses to store state objects. We're currently creating and destroying those slabs whenever the server is brought up or down. That seems excessive; may as well just do that in module initialization and exit. Also add some minor header cleanup. (Thanks to Andrew Morton for that and a compile fix.) Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Acked-by: Neil Brown <neilb@suse.de>
2007-10-09knfsd: demote some printk()s to dprintk()sJ. Bruce Fields
To quote a recent mail from Andrew Morton: Look: if there's a way in which an unprivileged user can trigger a printk we fix it, end of story. OK. I assume that goes double for printk()s that might be triggered by random hosts on the internet. So, disable some printk()s that look like they could be triggered by malfunctioning or malicious clients. For now, just downgrade them to dprintk()s. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Acked-by: Neil Brown <neilb@suse.de>
2007-10-09knfsd: cleanup of nfsd4 cmp_* functionsJ. Bruce Fields
Benny Halevy suggested renaming cmp_* to same_* to make the meaning of the return value clearer. Fix some nearby style deviations while we're at it, including a small swath of creative indentation in nfs4_preprocess_seqid_op(). Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Acked-by: Neil Brown <neilb@suse.de>
2007-07-20mm: Remove slab destructors from kmem_cache_create().Paul Mundt
Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-18locks: rename lease functions to reflect locks.c conventionsJ. Bruce Fields
We've been using the convention that vfs_foo is the function that calls a filesystem-specific foo method if it exists, or falls back on a generic method if it doesn't; thus vfs_foo is what is called when some other part of the kernel (normally lockd or nfsd) wants to get a lock, whereas foo is what filesystems call to use the underlying local functionality as part of their lock implementation. So rename setlease to vfs_setlease (which will call a filesystem-specific setlease after a later patch) and __setlease to setlease. Also, vfs_setlease need only be GPL-exported as long as it's only needed by lockd and nfsd. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
2007-07-17knfsd: nfsd4: don't delegate files that have had conflictsMeelap Shah
One more incremental delegation policy improvement: don't give out a delegation on a file if conflicting access has previously required that a delegation be revoked on that file. (In practice we'll forget about the conflict when the struct nfs4_file is removed on close, so this is of limited use for now, though it should at least solve a temporary problem with self-conflicts on write opens from the same client.) Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: nfsd4: vary maximum delegation limit based on RAM sizeMeelap Shah
Our original NFSv4 delegation policy was to give out a read delegation on any open when it was possible to. Since the lifetime of a delegation isn't limited to that of an open, a client may quite reasonably hang on to a delegation as long as it has the inode cached. This becomes an obvious problem the first time a client's inode cache approaches the size of the server's total memory. Our first quick solution was to add a hard-coded limit. This patch makes a mild incremental improvement by varying that limit according to the server's total memory size, allowing at most 4 delegations per megabyte of RAM. My quick back-of-the-envelope calculation finds that in the worst case (where every delegation is for a different inode), a delegation could take about 1.5K, which would make the worst case usage about 6% of memory. The new limit works out to be about the same as the old on a 1-gig server. [akpm@linux-foundation.org: Don't needlessly bloat vmlinux] [akpm@linux-foundation.org: Make it right for highmem machines] Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17knfsd: lockd: nfsd4: use same grace period for lockd and nfsd4Marc Eshel
Both lockd and (in the nfsv4 case) nfsd enforce a "grace period" after reboot, during which clients may reclaim locks from the previous server instance, but may not acquire new locks. Currently the lockd and nfsd enforce grace periods of different lengths. This may cause problems when we reboot a server with both v2/v3 and v4 clients. For example, if the lockd grace period is shorter (as is likely the case), then a v3 client might acquire a new lock that conflicts with a lock already held (but not yet reclaimed) by a v4 client. This patch calculates a lease time that lockd and nfsd can both use. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-10SUNRPC: Remove redundant calls to rpciod_up()/rpciod_down()Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-05-09nfsd/nfs4state: remove unnecessary daemonize callEric W. Biederman
Acked-by: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-06nfsd4: Convert NFSv4 to new lock interfaceMarc Eshel
Convert NFSv4 to the new lock interface. We don't define any callback for now, so we're not taking advantage of the asynchronous feature--that's less critical for the multi-threaded nfsd then it is for the single-threaded lockd. But this does allow a cluster filesystems to export cluster-coherent locking to NFS. Note that it's cluster filesystems that are the issue--of the filesystems that define lock methods (nfs, cifs, etc.), most are not exportable by nfsd. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-05-06locks: allow {vfs,posix}_lock_file to return conflicting lockMarc Eshel
The nfsv4 protocol's lock operation, in the case of a conflict, returns information about the conflicting lock. It's unclear how clients can use this, so for now we're not going so far as to add a filesystem method that can return a conflicting lock, but we may as well return something in the local case when it's easy to. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
2007-05-06locks: give posix_test_lock same interface as ->lockMarc Eshel
posix_test_lock() and ->lock() do the same job but have gratuitously different interfaces. Modify posix_test_lock() so the two agree, simplifying some code in the process. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
2007-03-27[PATCH] knfsd: nfsd4: remove superfluous cancel_delayed_work() callJ. Bruce Fields
This cancel_delayed_work call is called from a function that is only called from a piece of code that immediate follows a cancel and destruction of the workqueue, so it's clearly a mistake. Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27[PATCH] knfsd: nfsd4: demote "clientid in use" printk to a dprintkBruce Fields
The reused clientid here is a more of a problem for the client than the server, and the client can report the problem itself if it's serious. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12[PATCH] knfsd: SUNRPC: Provide room in svc_rqst for larger addressesChuck Lever
Expand the rq_addr field to allow it to contain larger addresses. Specifically, we replace a 'sockaddr_in' with a 'sockaddr_storage', then everywhere the 'sockaddr_in' was referenced, we use instead an accessor function (svc_addr_in) which safely casts the _storage to _in. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-12-13[PATCH] knfsd: nfsd4: reorganize compound opsJ.Bruce Fields
Define an op descriptor struct, use it to simplify nfsd4_proc_compound(). Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13[PATCH] knfsd: nfsd4: move replay_owner to cstateJ.Bruce Fields
Tuck away the replay_owner in the cstate while we're at it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13[PATCH] knfsd: nfsd4: pass saved and current fh together into nfsd4 operationsJ.Bruce Fields
Pass the saved and current filehandles together into all the nfsd4 compound operations. I want a unified interface to these operations so we can just call them by pointer and throw out the huge switch statement. Also I'll eventually want a structure like this--that holds the state used during compound processing--for deferral. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13[PATCH] knfsd: nfsd4: remove a dprink from nfsd4_lockJ.Bruce Fields
This dprintk is printing the wrong error now, but it's probably an unnecessary dprintk anyway; just remove it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08[PATCH] nfsd: change uses of f_{dentry, vfsmnt} to use f_pathJosef "Jeff" Sipek
Change all the uses of f_{dentry,vfsmnt} to f_path.{dentry,mnt} in the nfs server code. Signed-off-by: Josef "Jeff" Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07[PATCH] slab: remove kmem_cache_tChristoph Lameter
Replace all uses of kmem_cache_t with struct kmem_cache. The patch was generated using the following script: #!/bin/sh # # Replace one string by another in all the kernel sources. # set -e for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do quilt add $file sed -e "1,\$s/$1/$2/g" $file >/tmp/$$ mv /tmp/$$ $file quilt refresh done The script was run like this sh replace kmem_cache_t "struct kmem_cache" Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-22WorkStruct: make allyesconfigDavid Howells
Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
2006-10-20[PATCH] nfsd: nfs_replay_meAl Viro
We are using NFS_REPLAY_ME as a special error value that is never leaked to clients. That works fine; the only problem is mixing host- and network- endian values in the same objects. Network-endian equivalent would work just as fine; switch to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] nfsd: misc endianness annotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] nfsd: NFSv4 errno endianness annotationsAl Viro
don't use the same variable to store NFS and host error values Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] nfsd: nfs4 code returns error values in net-endianAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-27[PATCH] Really ignore kmem_cache_destroy return valueAlexey Dobriyan
* Rougly half of callers already do it by not checking return value * Code in drivers/acpi/osl.c does the following to be sure: (void)kmem_cache_destroy(cache); * Those who check it printk something, however, slab_error already printed the name of failed cache. * XFS BUGs on failed kmem_cache_destroy which is not the decision low-level filesystem driver should make. Converted to ignore. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-27[PATCH] fs: Conversions from kmalloc+memset to k(z|c)allocPanagiotis Issaris
Conversions from kmalloc+memset to kzalloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Jffs2-bit-acked-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix open flag passingJ. Bruce Fields
Since nfsv4 actually keeps around the file descriptors it gets from open (instead of just using them for a single read or write operation), we need to make sure that we can do RDWR opens and not just RDONLY/WRONLY. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix some open argument testsJ. Bruce Fields
These tests always returned true; clearly that wasn't what was intended. In keeping with kernel style, make them functions instead of macros while we're at it. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: remove superfluous grace period checksJ. Bruce Fields
We're checking nfs_in_grace here a few times when there isn't really any reason to--bad_stateid is probably the more sensible return value anyway. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-30[PATCH] knfsd: nfsd4: fix open_confirm lockingJ. Bruce Fields
Fix an improper unlock in an error path. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27[PATCH] spin/rwlock init cleanupsIngo Molnar
locking init cleanups: - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK() - convert rwlocks in a similar manner this patch was generated automatically. Motivation: - cleanliness - lockdep needs control of lock initialization, which the open-coded variants do not give - it's also useful for -rt and for lock debugging in general Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26[PATCH] fs: use list_move()Akinobu Mita
This patch converts the combination of list_del(A) and list_add(A, B) to list_move(A, B) under fs/. Cc: Ian Kent <raven@themaw.net> Acked-by: Joel Becker <joel.becker@oracle.com> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Hans Reiser <reiserfs-dev@namesys.com> Cc: Urban Widmark <urban@teststation.com> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] knfsd: nfsd4: grant delegations more frequentlyNeilBrown
Keep unused openowners around for at least one lease period, to avoid the need for as many open confirmations and to allow handing out more delegations. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] knfsd: nfsd4: limit number of delegations handed out.NeilBrown
It's very easy for the server to DOS itself by just giving out too many delegations. For now we just solve the problem with a dumb hard limit. Eventually we'll want a smarter policy. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] knfsd: nfsd4: add missing rpciod_down()NeilBrown
We should be shutting down rpciod for the callback channel when we shut down the server. Also note that we do rpciod_up() and create the callback client *before* setting cb_set--the cb_set only determines whether the initial null was succesful. So cb_set is not a reliable determiner of whether we need to clean up, only cb_client is. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] knfsd: nfsd4: fix laundromat shutdown raceNeilBrown
We need to make sure the laundromat work doesn't reschedule itself just when we try to cancel it. Also, we shouldn't be waiting for it to finish running while holding the state lock, as that's a potential deadlock. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] fs/nfsd/nfs4state.c: make a struct staticAdrian Bunk
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Marc Eshel <eshel@almaden.ibm.com> Cc: Andy Adamson <andros@citi.umich.edu> Cc: J. Bruce Fields <bfields@citi.umich.edu> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-11[PATCH] knfsd: locks: flag NFSv4-owned locksNeilBrown
Use the fl_lmops field to identify which locks are ours, instead of trying to look them up in our private hash. This is safer and more efficient. Earlier versions of this patch used a lock flag instead, but Trond pointed out that adding a new flag for each lock manager wasn't going to scale well, and suggested this approach instead; a separate patch converts lockd to using fl_lmops in the same way. In the NFSv4 case this looks like a bit of a hack, since the NFSv4 server isn't currently actually defining a lock_manager_operations struct, so we end up defining one *just* to serve as a cookie to identify our locks. But it works, and we actually do expect to start using the lock_manager_operations at some point anyway. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26[PATCH] NFSD4: return conflict lock without racesAndy Adamson
Update the NFSv4 server to use the new posix_lock_file_conf() interface. Remove unnecessary (and race-prone) posix_test_file() calls. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26[PATCH] sem2mutex: fs/Ingo Molnar
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Cc: Robert Love <rml@tech9.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-20locks,lockd: fix race in nlmsvc_testlockAndy Adamson
posix_test_lock() returns a pointer to a struct file_lock which is unprotected and can be removed while in use by the caller. Move the conflicting lock from the return to a parameter, and copy the conflicting lock. In most cases the caller ends up putting the copy of the conflicting lock on the stack. On i386, sizeof(struct file_lock) appears to be about 100 bytes. We're assuming that's reasonable. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>