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* NSM: convert printk(KERN_DEBUG) to a dprintk()Chuck Lever2009-01-061-2/+4
| | | | | | | | | Clean up: make the printk(KERN_DEBUG) in nsm_mon_unmon() a dprintk, and add another dprintk to note if creating an RPC client for the upcall failed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NSM: Use C99 structure initializer to initialize nsm_argsChuck Lever2009-01-061-7/+7
| | | | | | | | Clean up: Use a C99 structure initializer instead of open-coding the initialization of nsm_args. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Add helper to handle IPv4 addressesChuck Lever2009-01-061-3/+8
| | | | | | | | Clean up: introduce a helper function to generate IPv4 addresses using the same style as the IPv6 helper function we just added. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Support IPv6 scope IDs in nlm_display_address()Chuck Lever2009-01-061-6/+15
| | | | | | | | | | | | | Scope ID support is needed since the kernel's NSM implementation is about to use these displayed addresses as a mon_name in some cases. When nsm_use_hostnames is zero, without scope ID support NSM will fail to handle peers that contact us via a link-local address. Link-local addresses do not work without an interface ID, which is stored in the sockaddr's sin6_scope_id field. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Remove AF_UNSPEC arm in nlm_display_address()Chuck Lever2009-01-061-3/+0
| | | | | | | | | AF_UNSPEC support is no longer needed in nlm_display_address() now that a presentation address is no longer generated for the h_srcaddr field. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Remove address eye-catcher buffers from nlm_hostChuck Lever2009-01-061-7/+3
| | | | | | | | | | | | | | | | The h_name field in struct nlm_host is a just copy of h_nsmhandle->sm_name. Likewise, the contents of the h_addrbuf field should be identical to the sm_addrbuf field. The h_srcaddrbuf field is used only in one place for debugging. We can live without this until we get %pI formatting for printk(). Currently these buffers are 48 bytes, but we need to support scope IDs in IPv6 presentation addresses, which means making the buffers even larger. Instead, let's find ways to eliminate them to save space. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: set svc_serv->sv_maxconn to a more reasonable value (try #3)Jeff Layton2009-01-061-0/+8
| | | | | | | | | | | | | | | The default method for calculating the number of connections allowed per RPC service arbitrarily limits single-threaded services to 80 connections. This is too low for services like lockd and artificially limits the number of TCP clients that it can support. Have lockd set a default sv_maxconn value to 1024 (which is the typical default value for RLIMIT_NOFILE. Also add a module parameter to allow an admin to set this to an arbitrary value. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* Merge branch 'devel' into nextTrond Myklebust2008-12-303-11/+28
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| * NLM: allow lockd requests from an unprivileged portChuck Lever2008-12-232-2/+10
| | | | | | | | | | | | | | | | | | | | If the admin has specified the "noresvport" option for an NFS mount point, the kernel's NFS client uses an unprivileged source port for the main NFS transport. The kernel's lockd client should use an unprivileged port in this case as well. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * lockd: convert reclaimer thread to kthread interfaceJeff Layton2008-12-231-6/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | My understanding is that there is a push to turn the kernel_thread interface into a non-exported symbol and move all kernel threads to use the kthread API. This patch changes lockd to use kthread_run to spawn the reclaimer thread. I've made the assumption here that the extra module references taken when we spawn this thread are unnecessary and removed them. I've also added a KERN_ERR printk that pops if the thread can't be spawned to warn the admin that the locks won't be reclaimed. In the future, it would be nice to be able to notify userspace that locks have been lost (probably by implementing SIGLOST), and adding some good policies about how long we should reattempt to reclaim the locks. Finally, I removed a comment about memory leaks that I believe is obsolete and added a new one to clarify the result of sending a SIGKILL to the reclaimer thread. As best I can tell, doing so doesn't actually cause a memory leak. I consider this patch 2.6.29 material. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * LOCKD: Make lockd_up() and lockd_down() exported GPL-onlyTrond Myklebust2008-12-231-3/+3
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | Merge branch 'master' of ↵David S. Miller2008-12-152-1/+3
|\ \ | |/ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/e1000e/ich8lan.c
| * NLM: client-side nlm_lookup_host() should avoid matching on srcaddrChuck Lever2008-11-241-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit c98451bd, the loop in nlm_lookup_host() unconditionally compares the host's h_srcaddr field to the incoming source address. For client-side nlm_host entries, both are always AF_UNSPEC, so this check is unnecessary. Since commit 781b61a6, which added support for AF_INET6 addresses to nlm_cmp_addr(), nlm_cmp_addr() now returns FALSE for AF_UNSPEC addresses, which causes nlm_lookup_host() to create a fresh nlm_host entry every time it is called on the client. These extra entries will eventually expire once the server is unmounted, so the impact of this regression, introduced with lockd IPv6 support in 2.6.28, should be minor. We could fix this by adding an arm in nlm_cmp_addr() for AF_UNSPEC addresses, but really, nlm_lookup_host() shouldn't be matching on the srcaddr field for client-side nlm_host lookups. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd: clean up grace period on early exitJ. Bruce Fields2008-11-241-0/+1
| | | | | | | | | | | | | | | | | | If nfsd was shut down before the grace period ended, we could end up with a freed object still on grace_list. Thanks to Jeff Moyer for reporting the resulting list corruption warnings. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Tested-by: Jeff Moyer <jmoyer@redhat.com>
* | Merge branch 'master' of ↵David S. Miller2008-11-062-0/+2
|\ \ | |/ | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/ath5k/base.c net/8021q/vlan_core.c
| * NLM: Set address family before calling nlm_host_rebooted()Chuck Lever2008-10-302-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The nlm_host_rebooted() function uses nlm_cmp_addr() to find an nsm_handle that matches the rebooted peer. In order for this to work, the passed-in address must have a proper address family. This fixes a post-2.6.28 regression introduced by commit 781b61a6, which added AF_INET6 support to nlm_cmp_addr(). Before that commit, nlm_cmp_addr() didn't care about the address family; it compared only the sin_addr.s_addr field for equality. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | fs: replace NIPQUAD()Harvey Harrison2008-10-312-4/+4
| | | | | | | | | | | | | | | | Using NIPQUAD() with NIPQUAD_FMT, %d.%d.%d.%d or %u.%u.%u.%u can be replaced with %pI4 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: replace %p6 with %pI6Harvey Harrison2008-10-291-1/+1
| | | | | | | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | misc: replace NIP6_FMT with %p6 format specifierHarvey Harrison2008-10-281-1/+1
|/ | | | | | | | | | | | The iscsi_ibft.c changes are almost certainly a bugfix as the pointer 'ip' is a u8 *, so they never print the last 8 bytes of the IPv6 address, and the eight bytes they do print have a zero byte with them in each 16-bit word. Other than that, this should cause no difference in functionality. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* NLM: Remove "proto" argument from lockd_up()Chuck Lever2008-10-042-4/+3
| | | | | | | | | Clean up: Now that lockd_up() starts listeners for both transports, the "proto" argument is no longer needed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Always start both UDP and TCP listenersChuck Lever2008-10-041-18/+19
| | | | | | | | | | | | | | | | | | | | | | | | Commit 24e36663, which first appeared in 2.6.19, changed lockd so that the client side starts a UDP listener only if there is a UDP NFSv2/v3 mount. Its description notes: This... means that lockd will *not* listen on UDP if the only mounts are TCP mount (and nfsd hasn't started). The latter is the only one that concerns me at all - I don't know if this might be a problem with some servers. Unfortunately it is a problem for Linux itself. The rpc.statd daemon on Linux uses UDP for contacting the local lockd, no matter which protocol is used for NFS mounts. Without a local lockd UDP listener, NFSv2/v3 lock recovery from Linux NFS clients always fails. Revert parts of commit 24e36663 so lockd_up() always starts both listeners. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Remove unused fields in the nlm_reboot structureChuck Lever2008-10-032-4/+0
| | | | | | | | | | | | | | | | The nlm_reboot structure is used to store information provided by the NSM_NOTIFY procedure. This procedure is not specified by the NLM or NSM protocols, other than to say that the procedure can be used to transmit information private to a particular NLM/NSM implementation. For Linux, the callback arguments include the name of the monitored host, the new NSM state of the host, and a 16-byte private opaque. As a clean up, remove the unused fields and the server-side XDR logic that decodes them. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Add helper to sanity check incoming NOTIFY requestsChuck Lever2008-10-032-8/+4
| | | | | | | | | | | | | | | lockd accepts SM_NOTIFY calls only from a privileged process on the local system. If lockd uses an AF_INET6 listener, the sender's address (ie the local rpc.statd) will be the IPv6 loopback address, not the IPv4 loopback address. Make sure the privilege test in nlmsvc_proc_sm_notify() and nlm4svc_proc_sm_notify() works for both AF_INET and AF_INET6 family addresses by refactoring the test into a helper and adding support for IPv6 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: change nlmclnt_grant() to take a "struct sockaddr *"Chuck Lever2008-10-033-5/+4
| | | | | | | | | Adjust the signature and callers of nlmclnt_grant() to pass a "struct sockaddr *" instead of a "struct sockaddr_in *" in order to support IPv6 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Adjust nlmsvc_lookup_host() to accomodate AF_INET6 addressesChuck Lever2008-10-031-9/+38
| | | | | | | | Fix up nlmsvc_lookup_host() to pass AF_INET6 source addresses to nlm_lookup_host(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Adjust nlmclnt_lookup_host() signature to accomodate non-AF_INETChuck Lever2008-10-032-14/+23
| | | | | | | | | | | Pass a struct sockaddr * and a length to nlmclnt_lookup_host() to accomodate non-AF_INET family addresses. As a side benefit, eliminate the hostname_len argument, as the hostname is always NUL-terminated. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Support non-AF_INET addresses in nlm_lookup_host()Chuck Lever2008-10-031-17/+20
| | | | | | | | Use struct sockaddr * and length in nlm_lookup_host_info to all callers to pass in either AF_INET or AF_INET6 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Convert nlm_lookup_host() to use a single argumentChuck Lever2008-10-031-30/+56
| | | | | | | | | The nlm_lookup_host() function already has a large number of arguments, and I'm about to add a few more. As a clean up, convert the function to use a single data structure argument. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: reject reclaims outside the grace periodJ. Bruce Fields2008-10-031-0/+4
| | | | | | | | | | | | | | | The current lockd does not reject reclaims that arrive outside of the grace period. Accepting a reclaim means promising to the client that no conflicting locks were granted since last it held the lock. We can meet that promise if we assume the only lockers are nfs clients, and that they are sufficiently well-behaved to reclaim only locks that they held before, and that only reclaim locks have been permitted so far. Once we leave the grace period (and start permitting non-reclaims), we can no longer keep that promise. So we must start rejecting reclaims at that point. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: move grace period checks to common codeJ. Bruce Fields2008-10-033-27/+17
| | | | | | | Do all the grace period checks in svclock.c. This simplifies the code a bit, and will ease some later changes. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* nfsd: common grace period controlJ. Bruce Fields2008-10-035-28/+77
| | | | | | | | | | | | | | | | | | | | | Rewrite grace period code to unify management of grace period across lockd and nfsd. The current code has lockd and nfsd cooperate to compute a grace period which is satisfactory to them both, and then individually enforce it. This creates a slight race condition, since the enforcement is not coordinated. It's also more complicated than necessary. Here instead we have lockd and nfsd each inform common code when they enter the grace period, and when they're ready to leave the grace period, and allow normal locking only after both of them are ready to leave. We also expect the locks_start_grace()/locks_end_grace() interface here to be simpler to build on for future cluster/high-availability work, which may require (for example) putting individual filesystems into grace, or enforcing grace periods across multiple cluster nodes. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Update nsm_find() to support non-AF_INET addressesChuck Lever2008-09-291-8/+12
| | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Combine __nsm_find() and nsm_find().Chuck Lever2008-09-291-21/+11
| | | | | | | | | Clean up: Having two separate functions doesn't add clarity, so eliminate one of them. Use contemporary kernel coding conventions where appropriate. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Support AF_INET6 when hashing addresses in nlm_lookup_hostChuck Lever2008-09-291-6/+43
| | | | | | | | | | | | | Adopt an approach similar to the RPC server's auth cache (from Aurelien Charbon and Brian Haley). Note nlm_lookup_host()'s existing IP address hash function has the same issue with correctness on little-endian systems as the original IPv4 auth cache hash function, so I've also updated it with a hash function similar to the new auth cache hash function. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Teach nlm_cmp_addr() to support AF_INET6 addressesChuck Lever2008-09-293-5/+6
| | | | | | | | | Update the nlm_cmp_addr() helper to support AF_INET6 as well as AF_INET addresses. New version takes two "struct sockaddr *" arguments instead of "struct sockaddr_in *" arguments. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NSM: Use sockaddr_storage for sm_addr fieldChuck Lever2008-09-292-3/+4
| | | | | | | | To store larger addresses in the nsm_handle structure, make sm_addr a sockaddr_storage. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Use sockaddr_storage for h_saddr fieldChuck Lever2008-09-292-7/+7
| | | | | | | | | To store larger addresses in the nlm_host structure, make h_saddr a sockaddr_storage. And let's call it something more self-explanatory: "saddr" could easily be mistaken for "server address". Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Use sockaddr_storage + length for h_addr fieldChuck Lever2008-09-292-6/+7
| | | | | | | | To store larger addresses in the nlm_host structure, make h_addr a sockaddr_storage, and add an address length field. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Add address family-agnostic helper for zeroing the port numberChuck Lever2008-09-291-1/+13
| | | | | Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: Specify address family for source addressChuck Lever2008-09-291-5/+9
| | | | | | | | | Make sure an address family is specified for source addresses passed to nlm_lookup_host(). nlm_lookup_host() will need this when it becomes capable of dealing with AF_INET6 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: address-family independent printable addressesChuck Lever2008-09-291-17/+61
| | | | | | | | | | | | | | | | Knowing which source address is used for communicating with remote NLM services can be helpful for debugging configuration problems on hosts with multiple addresses. Keep the dprintk debugging here, but adapt it so it displays AF_INET6 addresses properly. There are also a couple of dprintk clean-ups as well. At some point we will aggregate the helpers that display presentation format addresses into a single set of shared helpers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* NLM: Clean up before introducing new debugging messagesChuck Lever2008-09-291-8/+11
| | | | | | | | | We're about to introduce some extra debugging messages in nlm_lookup_host(). Bring the coding style up to date first so we can cleanly introduce the new debugging messages. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* lockd: don't depend on lockd main loop to end graceJ. Bruce Fields2008-09-291-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | End lockd's grace period using schedule_delayed_work() instead of a check on every pass through the main loop. After a later patch, we'll depend on lockd to end its grace period even if it's not currently handling requests; so it shouldn't depend on being woken up from the main loop to do so. Also, Nakano Hiroaki (who independently produced a similar patch) noticed that the current behavior is buggy in the face of jiffies wraparound: "lockd uses time_before() to determine whether the grace period has expired. This would seem to be enough to avoid timer wrap-around issues, but, unfortunately, that is not the case. The time_* family of comparison functions can be safely used to compare jiffies relatively close in time, but they stop working after approximately LONG_MAX/2 ticks. nfsd can suffer this problem because the time_before() comparison in lockd() is not performed until the first request comes in, which means that if there is no lockd traffic for more than LONG_MAX/2 ticks we are screwed. "The implication of this is that once time_before() starts misbehaving any attempt from a NFS client to execute fcntl() will be received with a NLM_LCK_DENIED_GRACE_PERIOD message for 25 days (assuming HZ=1000). In other words, the 50 seconds grace period could turn into a grace period of 50 days or more. "Note: This bug was analyzed independently by Oda-san <oda@valinux.co.jp> and myself." Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Nakano Hiroaki <nakano.hiroaki@oss.ntt.co.jp> Cc: Itsuro Oda <oda@valinux.co.jp>
* locks: allow lockd to process blocked locks during grace periodJ. Bruce Fields2008-09-291-9/+3
| | | | | | | | | | | | The check here is currently harmless but unnecessary, since, as the comment notes, there aren't any blocked-lock callbacks to process during the grace period anyway. And eventually we want to allow multiple grace periods that come and go for different filesystems over the course of the lifetime of lockd, at which point this check is just going to get in the way. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* SUNRPC: Add address family field to svc_serv data structureChuck Lever2008-09-291-1/+1
| | | | | | | | | | Introduce and initialize an address family field in the svc_serv structure. This field will determine what family to use for the service's listener sockets and what families are advertised via the local rpcbind daemon. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2008-08-122-4/+4
|\ | | | | | | | | | | | | * 'for-2.6.27' of git://linux-nfs.org/~bfields/linux: fs/nfsd/export.c: Adjust error handling code involving auth_domain_put MAINTAINERS: mention lockd and sunrpc in nfs entries lockd: trivial sparse endian annotations
| * lockd: trivial sparse endian annotationsHarvey Harrison2008-07-232-4/+4
| | | | | | | | | | | | | | | | | | | | | | fs/lockd/svcproc.c:115:11: warning: incorrect type in initializer (different base types) fs/lockd/svcproc.c:115:11: expected int [signed] rc fs/lockd/svcproc.c:115:11: got restricted __be32 [usertype] <noident> ... and so on... Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | locks: add special return value for asynchronous locksMiklos Szeredi2008-07-251-9/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a special error value FILE_LOCK_DEFERRED to mean that a locking operation returned asynchronously. This is returned by posix_lock_file() for sleeping locks to mean that the lock has been queued on the block list, and will be woken up when it might become available and needs to be retried (either fl_lmops->fl_notify() is called or fl_wait is woken up). f_op->lock() to mean either the above, or that the filesystem will call back with fl_lmops->fl_grant() when the result of the locking operation is known. The filesystem can do this for sleeping as well as non-sleeping locks. This is to make sure, that return values of -EAGAIN and -EINPROGRESS by filesystems are not mistaken to mean an asynchronous locking. This also makes error handling in fs/locks.c and lockd/svclock.c slightly cleaner. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Matthew Wilcox <matthew@wil.cx> Cc: David Teigland <teigland@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lockd: dont return EAGAIN for a permanent errorMiklos Szeredi2008-07-251-1/+9
|/ | | | | | | | | | | | | | | | | | Fix nlm_fopen() to return NLM_FAILED (or NLM_LCK_DENIED_NOLOCKS) instead of NLM_LCK_DENIED. The latter means the lock request failed because of a conflicting lock (i.e. a temporary error), which is wrong in this case. Also fix the client to return ENOLCK instead of EAGAIN if a blocking lock request returns with NLM_LOCK_DENIED. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Matthew Wilcox <matthew@wil.cx> Cc: David Teigland <teigland@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2008-07-205-60/+52
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.27' of git://linux-nfs.org/~bfields/linux: (51 commits) nfsd: nfs4xdr.c do-while is not a compound statement nfsd: Use C99 initializers in fs/nfsd/nfs4xdr.c lockd: Pass "struct sockaddr *" to new failover-by-IP function lockd: get host reference in nlmsvc_create_block() instead of callers lockd: minor svclock.c style fixes lockd: eliminate duplicate nlmsvc_lookup_host call from nlmsvc_lock lockd: eliminate duplicate nlmsvc_lookup_host call from nlmsvc_testlock lockd: nlm_release_host() checks for NULL, caller needn't file lock: reorder struct file_lock to save space on 64 bit builds nfsd: take file and mnt write in nfs4_upgrade_open nfsd: document open share bit tracking nfsd: tabulate nfs4 xdr encoding functions nfsd: dprint operation names svcrdma: Change WR context get/put to use the kmem cache svcrdma: Create a kmem cache for the WR contexts svcrdma: Add flush_scheduled_work to module exit function svcrdma: Limit ORD based on client's advertised IRD svcrdma: Remove unused wait q from svcrdma_xprt structure svcrdma: Remove unneeded spin locks from __svc_rdma_free svcrdma: Add dma map count and WARN_ON ...
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