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* Remove explicit locking of struct file.Jeff Roberson2007-12-301-1/+8
| | | | | | | | | | | | | | | | - Introduce a finit() which is used to initailize the fields of struct file in such a way that the ops vector is only valid after the data, type, and flags are valid. - Protect f_flag and f_count with atomic operations. - Remove the global list of all files and associated accounting. - Rewrite the unp garbage collection such that it no longer requires the global list of all files and instead uses a list of all unp sockets. - Mark sockets in the accept queue so we don't incorrectly gc them. Tested by: kris, pho Notes: svn path=/head/; revision=174988
* Revise locking strategy used for UNIX domain sockets in order to improveRobert Watson2007-02-261-0/+1
| | | | | | | | | | | | | | | | | | | | | concurrency: - Add per-unpcb mutexes protecting unpcb connection state, fields, etc. - Replace global UNP mutex with a global UNP rwlock, which will protect the UNIX domain socket connection topology, v_socket, and be acquired exclusively before acquiring more than per-unpcb at a time in order to avoid lock order issues. In performance measurements involving MySQL, this change has little or no overhead on UP (+/- 1%), but leads to a significant (5%-30%) improvement in multi-processor measurements using the sysbench and supersmack benchmarks. Much testing by: kris Approved by: re (kensmith) Notes: svn path=/head/; revision=167030
* - Close a race between enumerating UNIX domain socket pcb structures viaJohn Baldwin2007-01-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | sysctl and socket teardown by adding a reference count to the UNIX domain pcb object and fixing the sysctl that enumerates unpcbs to grab a reference on each unpcb while it builds the list to copy out to userland. - Close a race between UNIX domain pcb garbage collection (unp_gc()) and file descriptor teardown (fdrop()) by adding a new garbage collection flag FWAIT. unp_gc() sets FWAIT while it walks the message buffers in a UNIX domain socket looking for nested file descriptor references and clears the flag when it is finished. fdrop() checks to see if the flag is set on a file descriptor whose refcount just dropped to 0 and waits for unp_gc() to clear the flag before completely destroying the file descriptor. MFC after: 1 week Reviewed by: rwatson Submitted by: ups Hopefully makes the panics go away: mx1 Notes: svn path=/head/; revision=165810
* Add two new unpcb flags, UNP_BINDING and UNP_CONNECTING, which will beRobert Watson2006-07-231-0/+8
| | | | | | | | | | | used to mark UNIX domain sockets as being in the process of binding or connecting. Use these to prevent simultaneous bind or connect operations by multiple threads or processes on the same socket at the same time, which closes race conditions present in the UNIX domain socket implementation since inception. Notes: svn path=/head/; revision=160590
* Implement unix(4) socket options LOCAL_CREDS and LOCAL_CONNWAIT.Matthew N. Dodd2005-04-131-0/+2
| | | | | | | | | | | - Add unp_addsockcred() (for LOCAL_CREDS). - Add an argument to unp_connect2() to differentiate between PRU_CONNECT and PRU_CONNECT2. (for LOCAL_CONNWAIT) Obtained from: NetBSD (with some changes) Notes: svn path=/head/; revision=144978
* /* -> /*- 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 vestiges of no longer needed unp_rvnode field.Jeffrey Hsu2003-02-061-1/+0
| | | | | | | Approved by: phk (who originally added it in rev 1.8 of unpcb.h) Notes: svn path=/head/; revision=110430
* Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/Jens Schweikhardt2002-12-301-1/+1
| | | | | | | Add FreeBSD Id tag where missing. Notes: svn path=/head/; revision=108470
* More s/file system/filesystem/gTom Rhodes2002-05-161-1/+1
| | | | Notes: svn path=/head/; revision=96755
* style(9) the structure definitions.David E. O'Brien2001-09-051-3/+3
| | | | Notes: svn path=/head/; revision=83045
* Implement a LOCAL_PEERCRED socket option which returns aDima Dorfman2001-08-171-0/+19
| | | | | | | | | | | | | | `struct xucred` with the credentials of the connected peer. Obviously this only works (and makes sense) on SOCK_STREAM sockets. This works for both the connect(2) and listen(2) callers. There is precise documentation of the semantics in unix(4). Reviewed by: dwmalone (eyeballed) Notes: svn path=/head/; revision=81857
* Back out the previous change to the queue(3) interface.Jake Burkholder2000-05-261-3/+3
| | | | | | | | | 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 Burkholder2000-05-231-3/+3
| | | | | | | | | | | 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
* This Implements the mumbled about "Jail" feature.Poul-Henning Kamp1999-04-281-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a seriously beefed up chroot kind of thing. The process is jailed along the same lines as a chroot does it, but with additional tough restrictions imposed on what the superuser can do. For all I know, it is safe to hand over the root bit inside a prison to the customer living in that prison, this is what it was developed for in fact: "real virtual servers". Each prison has an ip number associated with it, which all IP communications will be coerced to use and each prison has its own hostname. Needless to say, you need more RAM this way, but the advantage is that each customer can run their own particular version of apache and not stomp on the toes of their neighbors. It generally does what one would expect, but setting up a jail still takes a little knowledge. A few notes: I have no scripts for setting up a jail, don't ask me for them. The IP number should be an alias on one of the interfaces. mount a /proc in each jail, it will make ps more useable. /proc/<pid>/status tells the hostname of the prison for jailed processes. Quotas are only sensible if you have a mountpoint per prison. There are no privisions for stopping resource-hogging. Some "#ifdef INET" and similar may be missing (send patches!) If somebody wants to take it from here and develop it into more of a "virtual machine" they should be most welcome! Tools, comments, patches & documentation most welcome. Have fun... Sponsored by: http://www.rndassociates.com/ Run for almost a year by: http://www.servetheweb.com/ Notes: svn path=/head/; revision=46155
* Convert socket structures to be type-stable and add a version number.Garrett Wollman1998-05-151-4/+39
| | | | | | | | | | | | | | | | | | | | | | Define a parameter which indicates the maximum number of sockets in a system, and use this to size the zone allocators used for sockets and for certain PCBs. Convert PF_LOCAL PCB structures to be type-stable and add a version number. Define an external format for infomation about socket structures and use it in several places. Define a mechanism to get all PF_LOCAL and PF_INET PCB lists through sysctl(3) without blocking network interrupts for an unreasonable length of time. This probably still has some bugs and/or race conditions, but it seems to work well enough on my machines. It is now possible for `netstat' to get almost all of its information via the sysctl(3) interface rather than reading kmem (changes to follow). Notes: svn path=/head/; revision=36079
* Fix all areas of the system (or at least all those in LINT) to avoid storingGarrett Wollman1997-08-161-2/+2
| | | | | | | | | | | socket addresses in mbufs. (Socket buffers are the one exception.) A number of kernel APIs needed to get fixed in order to make this happen. Also, fix three protocol families which kept PCBs in mbufs to not malloc them instead. Delete some old compatibility cruft while we're at it, and add some new routines in the in_cksum family. Notes: svn path=/head/; revision=28270
* 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
* 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
* Made them all idempotent.Paul Richards1994-08-211-1/+6
| | | | | | | | Reviewed by: Submitted by: Notes: svn path=/head/; revision=2165
* Added $Id$David Greenman1994-08-021-0/+1
| | | | Notes: svn path=/head/; revision=1817
* BSD 4.4 Lite Kernel SourcesRodney W. Grimes1994-05-241-0/+73
Notes: svn path=/head/; revision=1541
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