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* Typo out->in.Konstantin Belousov2019-10-101-1/+1
| | | | | | | | Sponsored by: The FreeBSD Foundation MFC after: 3 days Notes: svn path=/head/; revision=353413
* sys: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326023
* Renumber copyright clause 4Warner Losh2017-02-281-1/+1
| | | | | | | | | | | | Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96 Notes: svn path=/head/; revision=314436
* The advisory lock may be activated or activated and removed during theKonstantin Belousov2009-05-241-0/+1
| | | | | | | | | | | | | | | | | | sleep waiting for conditions when the lock may be granted. To prevent lf_setlock() from accessing possibly freed memory, add reference counting to the struct lockf_entry. Bump refcount around the sleep. Make lf_free_lock() return non-zero when structure was freed, and use this after the sleep to return EINTR to the caller. The error code might need a clarification, but we cannot return success to usermode, since the lock is not owned anymore. Reviewed by: dfr Tested by: pho MFC after: 1 month Notes: svn path=/head/; revision=192685
* Re-implement the client side of rpc.lockd in the kernel. This implementationDoug Rabson2008-06-261-0/+5
| | | | | | | | | | | | | | | provides the correct semantics for flock(2) style locks which are used by the lockf(1) command line tool and the pidfile(3) library. It also implements recovery from server restarts and ensures that dirty cache blocks are written to the server before obtaining locks (allowing multiple clients to use file locking to safely share data). Sponsored by: Isilon Systems PR: 94256 MFC after: 2 weeks Notes: svn path=/head/; revision=180025
* Move the head of byte-level advisory lock list from theKonstantin Belousov2008-04-161-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | filesystem-specific vnode data to the struct vnode. Provide the default implementation for the vop_advlock and vop_advlockasync. Purge the locks on the vnode reclaim by using the lf_purgelocks(). The default implementation is augmented for the nfs and smbfs. In the nfs_advlock, push the Giant inside the nfs_dolock. Before the change, the vop_advlock and vop_advlockasync have taken the unlocked vnode and dereferenced the fs-private inode data, racing with with the vnode reclamation due to forced unmount. Now, the vop_getattr under the shared vnode lock is used to obtain the inode size, and later, in the lf_advlockasync, after locking the vnode interlock, the VI_DOOMED flag is checked to prevent an operation on the doomed vnode. The implementation of the lf_purgelocks() is submitted by dfr. Reported by: kris Tested by: kris, pho Discussed with: jeff, dfr MFC after: 2 weeks Notes: svn path=/head/; revision=178243
* Add the new kernel-mode NFS Lock Manager. To use it instead of theDoug Rabson2008-03-261-18/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | user-mode lock manager, build a kernel with the NFSLOCKD option and add '-k' to 'rpc_lockd_flags' in rc.conf. Highlights include: * Thread-safe kernel RPC client - many threads can use the same RPC client handle safely with replies being de-multiplexed at the socket upcall (typically driven directly by the NIC interrupt) and handed off to whichever thread matches the reply. For UDP sockets, many RPC clients can share the same socket. This allows the use of a single privileged UDP port number to talk to an arbitrary number of remote hosts. * Single-threaded kernel RPC server. Adding support for multi-threaded server would be relatively straightforward and would follow approximately the Solaris KPI. A single thread should be sufficient for the NLM since it should rarely block in normal operation. * Kernel mode NLM server supporting cancel requests and granted callbacks. I've tested the NLM server reasonably extensively - it passes both my own tests and the NFS Connectathon locking tests running on Solaris, Mac OS X and Ubuntu Linux. * Userland NLM client supported. While the NLM server doesn't have support for the local NFS client's locking needs, it does have to field async replies and granted callbacks from remote NLMs that the local client has contacted. We relay these replies to the userland rpc.lockd over a local domain RPC socket. * Robust deadlock detection for the local lock manager. In particular it will detect deadlocks caused by a lock request that covers more than one blocking request. As required by the NLM protocol, all deadlock detection happens synchronously - a user is guaranteed that if a lock request isn't rejected immediately, the lock will eventually be granted. The old system allowed for a 'deferred deadlock' condition where a blocked lock request could wake up and find that some other deadlock-causing lock owner had beaten them to the lock. * Since both local and remote locks are managed by the same kernel locking code, local and remote processes can safely use file locks for mutual exclusion. Local processes have no fairness advantage compared to remote processes when contending to lock a region that has just been unlocked - the local lock manager enforces a strict first-come first-served model for both local and remote lockers. Sponsored by: Isilon Systems PR: 95247 107555 115524 116679 MFC after: 2 weeks Notes: svn path=/head/; revision=177633
* Correct typo in commentChristian S.J. Peron2007-05-171-1/+1
| | | | Notes: svn path=/head/; revision=169660
* - Fix leak of struct nlminfo on process exit.Gleb Smirnoff2005-10-261-4/+0
| | | | | | | | | | - Fix malloc type collision, that made the above problem difficult to understand. Reported by: Vladimir Sharun <sharun ukr.net> Notes: svn path=/head/; revision=151695
* - Make lf_print static and move its prototype into kern_lockf.cJeff Roberson2005-01-251-5/+0
| | | | | | | | | | - Protect all of the advlock code with Giant as some filesystems may not be entering with Giant held now. Sponsored by: Isilon Systems, Inc. Notes: svn path=/head/; revision=140808
* /* -> /*- for license, minor formatting changesWarner Losh2005-01-071-1/+1
| | | | Notes: svn path=/head/; revision=139825
* Remove advertising clause from University of California Regent's license,Warner Losh2004-04-071-4/+0
| | | | | | | | | per letter dated July 22, 1999. Approved by: core Notes: svn path=/head/; revision=127976
* Remove __PAlfred Perlstein2002-03-191-3/+3
| | | | Notes: svn path=/head/; revision=92719
* Wrap around MALLOC_DECLARE() invocation with #ifdef.Boris Popov2001-05-031-0/+2
| | | | Notes: svn path=/head/; revision=76235
* Implement client side NFS locks.Alfred Perlstein2001-04-171-0/+2
| | | | | | | | Obtained from: BSD/os Import Ok'd by: mckusick, jkh, motd on builder.freebsd.org Notes: svn path=/head/; revision=75631
* Back out the previous change to the queue(3) interface.Jake Burkholder2000-05-261-2/+2
| | | | | | | | | It was not discussed and should probably not happen. Requested by: msmith and others Notes: svn path=/head/; revision=60938
* Change the way that the queue(3) structures are declared; don't assume thatJake Burkholder2000-05-231-2/+2
| | | | | | | | | | | the type argument to *_HEAD and *_ENTRY is a struct. Suggested by: phk Reviewed by: phk Approved by: mdodd Notes: svn path=/head/; revision=60833
* $Id$ -> $FreeBSD$Peter Wemm1999-08-281-1/+1
| | | | Notes: svn path=/head/; revision=50477
* Forward declare a struct and #include <sys/queue.h> so that this fileBruce Evans1998-02-031-1/+5
| | | | | | | is more "self"-sufficent. Notes: svn path=/head/; revision=33057
* Some staticized variables were still declared to be extern.Bruce Evans1997-09-071-3/+1
| | | | Notes: svn path=/head/; revision=29179
* Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are notPeter Wemm1997-02-221-1/+1
| | | | | | | ready for it yet. Notes: svn path=/head/; revision=22975
* This is the kernel Lite/2 commit. There are some requisite userlandJohn Dyson1997-02-101-8/+12
| | | | | | | | | | | | | | | | | | changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org> Notes: svn path=/head/; revision=22521
* Make the long-awaited change from $Id$ to $FreeBSD$Jordan K. Hubbard1997-01-141-1/+1
| | | | | | | | | | | This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise. Notes: svn path=/head/; revision=21673
* Removed bogus _BEGIN_DECLS/_END_DECLS.Bruce Evans1996-05-011-7/+3
| | | | | | | | | Removed unused struct tag declarations in cloned code. Added or cleaned up idempotency ifdefs. Notes: svn path=/head/; revision=15493
* A Major staticize sweep. Generates a couple of warnings that I'll dealPoul-Henning Kamp1995-12-141-11/+1
| | | | | | | | | with later. A number of unused vars removed. A number of unused procs removed or #ifdefed. Notes: svn path=/head/; revision=12819
* Made them all idempotent.Paul Richards1994-08-211-1/+6
| | | | | | | | Reviewed by: Submitted by: Notes: svn path=/head/; revision=2165
* Made lockf advisory locking code generic (rather than ufs specific), andDavid Greenman1994-08-081-0/+81
use it in NFS. This is required both for diskless support and for POSIX compliance. Note: the support in NFS is only for the local node. Submitted by: based on work originally done by Yuval Yurom Notes: svn path=/head/; revision=1960
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