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* Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notifyLinus Torvalds2010-08-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.infradead.org/users/eparis/notify: (132 commits) fanotify: use both marks when possible fsnotify: pass both the vfsmount mark and inode mark fsnotify: walk the inode and vfsmount lists simultaneously fsnotify: rework ignored mark flushing fsnotify: remove global fsnotify groups lists fsnotify: remove group->mask fsnotify: remove the global masks fsnotify: cleanup should_send_event fanotify: use the mark in handler functions audit: use the mark in handler functions dnotify: use the mark in handler functions inotify: use the mark in handler functions fsnotify: send fsnotify_mark to groups in event handling functions fsnotify: Exchange list heads instead of moving elements fsnotify: srcu to protect read side of inode and vfsmount locks fsnotify: use an explicit flag to indicate fsnotify_destroy_mark has been called fsnotify: use _rcu functions for mark list traversal fsnotify: place marks on object in order of group memory address vfs/fsnotify: fsnotify_close can delay the final work in fput fsnotify: store struct file not struct path ... Fix up trivial delete/modify conflict in fs/notify/inotify/inotify.c.
| * fsnotify: pass a file instead of an inode to open, read, and writeEric Paris2010-07-28
| | | | | | | | | | | | | | | | | | | | fanotify, the upcoming notification system actually needs a struct path so it can do opens in the context of listeners, and it needs a file so it can get f_flags from the original process. Close was the only operation that already was passing a struct file to the notification hook. This patch passes a file for access, modify, and open as well as they are easily available to these hooks. Signed-off-by: Eric Paris <eparis@redhat.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2010-08-10
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits) no need for list_for_each_entry_safe()/resetting with superblock list Fix sget() race with failing mount vfs: don't hold s_umount over close_bdev_exclusive() call sysv: do not mark superblock dirty on remount sysv: do not mark superblock dirty on mount btrfs: remove junk sb_dirt change BFS: clean up the superblock usage AFFS: wait for sb synchronization when needed AFFS: clean up dirty flag usage cifs: truncate fallout mbcache: fix shrinker function return value mbcache: Remove unused features add f_flags to struct statfs(64) pass a struct path to vfs_statfs update VFS documentation for method changes. All filesystems that need invalidate_inode_buffers() are doing that explicitly convert remaining ->clear_inode() to ->evict_inode() Make ->drop_inode() just return whether inode needs to be dropped fs/inode.c:clear_inode() is gone fs/inode.c:evict() doesn't care about delete vs. non-delete paths now ... Fix up trivial conflicts in fs/nilfs2/super.c
| * | pass a struct path to vfs_statfsChristoph Hellwig2010-08-09
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'll need the path to implement the flags field for statvfs support. We do have it available in all callers except: - ecryptfs_statfs. This one doesn't actually need vfs_statfs but just needs to do a caller to the lower filesystem statfs method. - sys_ustat. Add a non-exported statfs_by_dentry helper for it which doesn't won't be able to fill out the flags field later on. In addition rename the helpers for statfs vs fstatfs to do_*statfs instead of the misleading vfs prefix. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-2.6.36' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-08-07
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.36' of git://linux-nfs.org/~bfields/linux: (34 commits) nfsd4: fix file open accounting for RDWR opens nfsd: don't allow setting maxblksize after svc created nfsd: initialize nfsd versions before creating svc net: sunrpc: removed duplicated #include nfsd41: Fix a crash when a callback is retried nfsd: fix startup/shutdown order bug nfsd: minor nfsd read api cleanup gcc-4.6: nfsd: fix initialized but not read warnings nfsd4: share file descriptors between stateid's nfsd4: fix openmode checking on IO using lock stateid nfsd4: miscellaneous process_open2 cleanup nfsd4: don't pretend to support write delegations nfsd: bypass readahead cache when have struct file nfsd: minor nfsd_svc() cleanup nfsd: move more into nfsd_startup() nfsd: just keep single lockd reference for nfsd nfsd: clean up nfsd_create_serv error handling nfsd: fix error handling in __write_ports_addxprt nfsd: fix error handling when starting nfsd with rpcbind down nfsd4: fix v4 state shutdown error paths ...
| * nfsd4: fix file open accounting for RDWR opensJ. Bruce Fields2010-08-07
| | | | | | | | | | | | | | | | | | Commit f9d7562fdb9dc0ada3a7aba5dbbe9d965e2a105d "nfsd4: share file descriptors between stateid's" didn't correctly account for O_RDWR opens. Symptoms include leaked files, resulting in failures to unmount and/or warnings about orphaned inodes on reboot. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: don't allow setting maxblksize after svc createdJ. Bruce Fields2010-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It's harmless to set this after the server is created, but also ineffective, since the value is only used at the time of svc_create_pooled(). So fail the attempt, in keeping with the pattern set by write_versions, write_{lease,grace}time and write_recoverydir. (This could break userspace that tried to write to nfsd/max_block_size between setting up sockets and starting the server. However, such code wouldn't have worked anyway, and I don't know of any examples--rpc.nfsd in nfs-utils, probably the only user of the interface, doesn't do that.) Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: initialize nfsd versions before creating svcJ. Bruce Fields2010-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 59db4a0c102e0de226a3395dbf25ea51bf845937 "nfsd: move more into nfsd_startup()" inadvertently moved nfsd_versions after nfsd_create_svc(). On older distributions using an rpc.nfsd that does not explicitly set the list of nfsd versions, this results in svc-create_pooled() being called with an empty versions array. The resulting incomplete initialization leads to a NULL dereference in svc_process_common() the first time a client accesses the server. Move nfsd_reset_versions() back before the svc_create_pooled(); this time, put it closer to the svc_create_pooled() call, to make this mistake more difficult in the future. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd41: Fix a crash when a callback is retriedBoaz Harrosh2010-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a callback is retried at nfsd4_cb_recall_done() due to some error, the returned rpc reply crashes here: @@ -514,6 +514,7 @@ decode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_cb_sequence *res, u32 dummy; __be32 *p; + BUG_ON(!res); if (res->cbs_minorversion == 0) return 0; [BUG_ON added for demonstration] This is because the nfsd4_cb_done_sequence() has NULLed out the task->tk_msg.rpc_resp pointer. Also eventually the rpc would use the new slot without making sure it is free by calling nfsd41_cb_setup_sequence(). This problem was introduced by a 4.1 protocol addition patch: [0421b5c5] nfsd41: Backchannel: Implement cb_recall over NFSv4.1 Which was overlooking the possibility of an RPC callback retries. For not-4.1 case redoing the _prepare is harmless. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: fix startup/shutdown order bugJ. Bruce Fields2010-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | We must create the server before we can call init_socks or check the number of threads. Symptoms were a NULL pointer dereference in nfsd_svc(). Problem identified by Jeff Layton. Also fix a minor cleanup-on-error case in nfsd_startup(). Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: minor nfsd read api cleanupJ. Bruce Fields2010-07-30
| | | | | | | | | | | | | | | | | | Christoph points that the NFSv2/v3 callers know which case they want here, so we may as well just call the file=NULL case directly instead of making this conditional. Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * gcc-4.6: nfsd: fix initialized but not read warningsAndi Kleen2010-07-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes at least one real minor bug: the nfs4 recovery dir sysctl would not return its status properly. Also I finished Al's 1e41568d7378d ("Take ima_path_check() in nfsd past dentry_open() in nfsd_open()") commit, it moved the IMA code, but left the old path initializer in there. The rest is just dead code removed I think, although I was not fully sure about the "is_borc" stuff. Some more review would be still good. Found by gcc 4.6's new warnings. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: share file descriptors between stateid'sJ. Bruce Fields2010-07-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The vfs doesn't really allow us to "upgrade" a file descriptor from read-only to read-write, and our attempt to do so in nfs4_upgrade_open is ugly and incomplete. Move to a different scheme where we keep multiple opens, shared between open stateid's, in the nfs4_file struct. Each file will be opened at most 3 times (for read, write, and read-write), and those opens will be shared between all clients and openers. On upgrade we will do another open if necessary instead of attempting to upgrade an existing open. We keep count of the number of readers and writers so we know when to close the shared files. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: fix openmode checking on IO using lock stateidJ. Bruce Fields2010-07-29
| | | | | | | | | | | | | | | | | | | | | | It is legal to perform a write using the lock stateid that was originally associated with a read lock, or with a file that was originally opened for read, but has since been upgraded. So, when checking the openmode, check the mode associated with the open stateid from which the lock was derived. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: miscellaneous process_open2 cleanupJ. Bruce Fields2010-07-29
| | | | | | | | | | | | Move more work into helper functions. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: don't pretend to support write delegationsJ. Bruce Fields2010-07-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The delegation code mostly pretends to support either read or write delegations. However, correct support for write delegations would require, for example, breaking of delegations (and/or implementation of cb_getattr) on stat. Currently all that stops us from handing out delegations is a subtle reference-counting issue. Avoid confusion by adding an earlier check that explicitly refuses write delegations. For now, though, I'm not going so far as to rip out existing half-support for write delegations, in case we get around to using that soon. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: bypass readahead cache when have struct fileJ. Bruce Fields2010-07-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The readahead cache compensates for the fact that the NFS server currently does an open and close on every IO operation in the NFSv2 and NFSv3 case. In the NFSv4 case we have long-lived struct files associated with client opens, so there's no need for this. In fact, concurrent IO's using trying to modify the same file->f_ra may cause problems. So, don't bother with the readahead cache in that case. Note eventually we'll likely do this in the v2/v3 case as well by keeping a cache of struct files instead of struct file_ra_state's. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: minor nfsd_svc() cleanupJ. Bruce Fields2010-07-23
| | | | | | | | | | | | More idiomatic to put the error case in the if clause. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: move more into nfsd_startup()J. Bruce Fields2010-07-23
| | | | | | | | | | | | | | | | This is just cleanup--it's harmless to call nfsd_rachache_init, nfsd_init_socks, and nfsd_reset_versions more than once. But there's no point to it. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: just keep single lockd reference for nfsdJeff Layton2010-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | Right now, nfsd keeps a lockd reference for each socket that it has open. This is unnecessary and complicates the error handling on startup and shutdown. Change it to just do a lockd_up when starting the first nfsd thread just do a single lockd_down when taking down the last nfsd thread. Because of the strange way the sv_count is handled this requires an extra flag to tell whether the nfsd_serv holds a reference for lockd or not. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: clean up nfsd_create_serv error handlingJeff Layton2010-07-23
| | | | | | | | | | | | | | | | There doesn't seem to be any need to reset the nfssvc_boot time if the nfsd startup failed. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: fix error handling in __write_ports_addxprtJeff Layton2010-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __write_ports_addxprt calls nfsd_create_serv. That increases the refcount of nfsd_serv (which is tracked in sv_nrthreads). The service only decrements the thread count on error, not on success like __write_ports_addfd does, so using this interface leaves the nfsd thread count high. Fix this by having this function call svc_destroy() on error to release the reference (and possibly to tear down the service) and simply decrement the refcount without tearing down the service on success. This makes the sv_threads handling work basically the same in both __write_ports_addxprt and __write_ports_addfd. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: fix error handling when starting nfsd with rpcbind downJeff Layton2010-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The refcounting for nfsd is a little goofy. What happens is that we create the nfsd RPC service, attach sockets to it but don't actually start the threads until someone writes to the "threads" procfile. To do this, __write_ports_addfd will create the nfsd service and then will decrement the refcount when exiting but won't actually destroy the service. This is fine when there aren't errors, but when there are this can cause later attempts to start nfsd to fail. nfsd_serv will be set, and that causes __write_versions to return EBUSY. Fix this by calling svc_destroy on nfsd_serv when this function is going to return error. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: fix v4 state shutdown error pathsJeff Layton2010-07-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If someone tries to shut down the laundry_wq while it isn't up it'll cause an oops. This can happen because write_ports can create a nfsd_svc before we really start the nfs server, and we may fail before the server is ever started. Also make sure state is shutdown on error paths in nfsd_svc(). Use a common global nfsd_up flag instead of nfs4_init, and create common helper functions for nfsd start/shutdown, as there will be other work that we want done only when we the number of nfsd threads transitions between zero and nonzero. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: remove unused assignment from nfsd_linkJ. Bruce Fields2010-07-23
| | | | | | | | | | | | | | Trivial cleanup, since "dest" is never used. Reported-by: Anshul Madan <Anshul.Madan@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * NFSD: Fill in WCC data for REMOVE, RMDIR, MKNOD, and MKDIRChuck Lever2010-07-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some well-known NFSv3 clients drop their directory entry caches when they receive replies with no WCC data. Without this data, they employ extra READ, LOOKUP, and GETATTR requests to ensure their directory entry caches are up to date, causing performance to suffer needlessly. In order to return WCC data, our server has to have both the pre-op and the post-op attribute data on hand when a reply is XDR encoded. The pre-op data is filled in when the incoming fh is locked, and the post-op data is filled in when the fh is unlocked. Unfortunately, for REMOVE, RMDIR, MKNOD, and MKDIR, the directory fh is not unlocked until well after the reply has been XDR encoded. This means that encode_wcc_data() does not have wcc_data for the parent directory, so none is returned to the client after these operations complete. By unlocking the parent directory fh immediately after the internal operations for each NFS procedure is complete, the post-op data is filled in before XDR encoding starts, so it can be returned to the client properly. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: comment nitpickJ. Bruce Fields2010-07-06
| | | | | | | | | | Reported-by: "Madan, Anshul" <Anshul.Madan@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: fix delegation recall race use-after-freeJ. Bruce Fields2010-06-24
| | | | | | | | | | | | | | | | | | | | When the rarely-used callback-connection-changing setclientid occurs simultaneously with a delegation recall, we rerun the recall by requeueing it on a workqueue. But we also need to take a reference on the delegation in that case, since the delegation held by the rpc itself will be released by the rpc_release callback. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: fix deleg leak on callback errorJ. Bruce Fields2010-06-24
| | | | | | | | Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: remove some debugging codeJ. Bruce Fields2010-06-22
| | | | | | | | | | | | This is overkill. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd: nfs4callback encode_stateid helper functionBenny Halevy2010-06-22
| | | | | | | | | | | | | | | | | | | | | | | | To be used also for the pnfs cb_layoutrecall callback Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd4: fix cb_recall encoding] "nfsd: nfs4callback encode_stateid helper function" forgot to reserve more space after return from the new helper. Reported-by: Michael Groshans <groshans@citi.umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: translate memory errors to delay, not serverfaultJ. Bruce Fields2010-06-22
| | | | | | | | | | | | | | If the server is out of memory is better for clients to back off and retry than to just error out. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4; fix session reference count leakJ. Bruce Fields2010-06-22
| | | | | | | | | | | | | | Note the session has to be put() here regardless of what happens to the client. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: don't bother storing callback reply tagJ. Bruce Fields2010-05-31
| | | | | | | | | | | | We don't use this, and probably never will. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: fix use of op_share_accessJ. Bruce Fields2010-05-31
| | | | | | | | | | | | | | | | | | NFSv4.1 adds additional flags to the share_access argument of the open call. These flags need to be masked out in some of the existing code, but current code does that inconsistently. Tested-by: Michael Groshans <groshans@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: treat more recall errors as failuresJ. Bruce Fields2010-05-31
| | | | | | | | | | | | | | | | | | | | | | If a recall fails for some unexpected reason, instead of ignoring it and treating it like a success, it's safer to treat it as a failure, preventing further delgation grants and returning CB_PATH_DOWN. Also put put switches in a (two me) more logical order, with normal case first. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd4: remove extra put() on callback errorsJ. Bruce Fields2010-05-31
| | | | | | | | | | | | | | Since rpc_call_async() guarantees that the release method will be called even on failure, this put is wrong. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | Merge branch 'for-2.6.35' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-06-09
|\ \ | |/ |/| | | | | | | * 'for-2.6.35' of git://linux-nfs.org/~bfields/linux: nfsd4: shut down callback queue outside state lock nfsd: nfsd_setattr needs to call commit_metadata
| * Merge branch 'for-2.6.34-incoming' into for-2.6.35-incomingJ. Bruce Fields2010-06-08
| |\
| | * nfsd: nfsd_setattr needs to call commit_metadataChristoph Hellwig2010-06-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The conversion of write_inode_now calls to commit_metadata in commit f501912a35c02eadc55ca9396ece55fe36f785d0 missed out the call in nfsd_setattr. But without this conversion we can't guarantee that a SETATTR request has actually been commited to disk with XFS, which causes a regression from 2.6.32 (only for NFSv2, but anyway). Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | nfsd4: shut down callback queue outside state lockJ. Bruce Fields2010-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | This reportedly causes a lockdep warning on nfsd shutdown. That looks like a false positive to me, but there's no reason why this needs the state lock anyway. Reported-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | | kernel-wide: replace USHORT_MAX, SHORT_MAX and SHORT_MIN with USHRT_MAX, ↵Alexey Dobriyan2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SHRT_MAX and SHRT_MIN - C99 knows about USHRT_MAX/SHRT_MAX/SHRT_MIN, not USHORT_MAX/SHORT_MAX/SHORT_MIN. - Make SHRT_MIN of type s16, not int, for consistency. [akpm@linux-foundation.org: fix drivers/dma/timb_dma.c] [akpm@linux-foundation.org: fix security/keys/keyring.c] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | sanitize vfs_fsync calling conventionsChristoph Hellwig2010-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the last user passing a NULL file pointer is gone we can remove the redundant dentry argument and associated hacks inside vfs_fsynmc_range. The next step will be removig the dentry argument from ->fsync, but given the luck with the last round of method prototype changes I'd rather defer this until after the main merge window. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | nfsd: open a file descriptor for fsync in nfs4 recoveryChristoph Hellwig2010-05-21
|/ / | | | | | | | | | | | | | | | | | | | | | | Instead of just looking up a path use do_filp_open to get us a file structure for the nfs4 recovery directory. This allows us to get rid of the last non-standard vfs_fsync caller with a NULL file pointer. [AV: should be using fput(), not filp_close()] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Revert "nfsd4: distinguish expired from stale stateids"J. Bruce Fields2010-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 78155ed75f470710f2aecb3e75e3d97107ba8374. We're depending here on the boot time that we use to generate the stateid being monotonic, but get_seconds() is not necessarily. We still depend at least on boot_time being different every time, but that is a safer bet. We have a few reports of errors that might be explained by this problem, though we haven't been able to confirm any of them. But the minor gain of distinguishing expired from stale errors seems not worth the risk. Conflicts: fs/nfsd/nfs4state.c Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: safer initialization order in find_file()Pavel Emelyanov2010-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The alloc_init_file() first adds a file to the hash and then initializes its fi_inode, fi_id and fi_had_conflict. The uninitialized fi_inode could thus be erroneously checked by the find_file(), so move the hash insertion lower. The client_mutex should prevent this race in practice; however, we eventually hope to make less use of the client_mutex, so the ordering here is an accident waiting to happen. I didn't find whether the same can be true for two other fields, but the common sense tells me it's better to initialize an object before putting it into a global hash table :) Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfs4: minor callback code simplification, commentJ. Bruce Fields2010-05-18
| | | | | | | | | | | | | | | | | | | | | | Note the position in the version array doesn't have to match the actual rpc version number--to me it seems clearer to maintain the distinction. Also document choice of rpc callback version number, as discussed in e.g. http://www.ietf.org/mail-archive/web/nfsv4/current/msg07985.html and followups. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | NFSD: don't report compiled-out versions as presentPavel Emelyanov2010-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The /proc/fs/nfsd/versions file calls nfsd_vers() to check whether the particular nfsd version is present/available. The problem is that once I turn off e.g. NFSD-V4 this call returns -1 which is true from the callers POV which is wrong. The proposal is to report false in that case. The bug has existed since 6658d3a7bbfd1768 "[PATCH] knfsd: remove nfsd_versbits as intermediate storage for desired versions". Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: stable@kernel.org Acked-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd4: implement reclaim_completeJ. Bruce Fields2010-05-13
| | | | | | | | | | | | | | This is a mandatory operation. Also, here (not in open) is where we should be committing the reboot recovery information. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd4: nfsd4_destroy_session must set callback client under the state lockBenny Halevy2010-05-13
| | | | | | | | | | | | | | | | nfsd4_set_callback_client must be called under the state lock to atomically set or unset the callback client and shutting down the previous one. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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