783 lines
21 KiB
C
783 lines
21 KiB
C
/*
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*
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* Coda: an Experimental Distributed File System
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* Release 3.1
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*
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* Copyright (c) 1987-1998 Carnegie Mellon University
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* All Rights Reserved
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation, and
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* that credit is given to Carnegie Mellon University in all documents
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* and publicity pertaining to direct or indirect use of this code or its
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* derivatives.
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*
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* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
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* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
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* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
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* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
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* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
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* ANY DERIVATIVE WORK.
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*
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* Carnegie Mellon encourages users of this software to return any
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* improvements or extensions that they make, and to grant Carnegie
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* Mellon the rights to redistribute these changes without encumbrance.
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*
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* @(#) src/sys/cfs/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
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* $Id: coda_vfsops.c,v 1.12 1999/05/08 06:39:04 phk Exp $
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*
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1989 Carnegie-Mellon University
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* All rights reserved. The CMU software License Agreement specifies
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* the terms and conditions for use and redistribution.
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*/
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/*
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* This code was written for the Coda file system at Carnegie Mellon
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* University. Contributers include David Steere, James Kistler, and
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* M. Satyanarayanan.
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*/
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/*
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* HISTORY
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* $Log: coda_vfsops.c,v $
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* Revision 1.12 1999/05/08 06:39:04 phk
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* I got tired of seeing all the cdevsw[major(foo)] all over the place.
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*
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* Made a new (inline) function devsw(dev_t dev) and substituted it.
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*
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* Changed to the BDEV variant to this format as well: bdevsw(dev_t dev)
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*
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* DEVFS will eventually benefit from this change too.
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*
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* Revision 1.11 1999/01/17 20:25:17 peter
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* Clean up the KLD/LKM goop a bit.
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*
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* Revision 1.10 1998/12/04 22:54:43 archie
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* Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
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* for possible buffer overflow problems. Replaced most sprintf()'s
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* with snprintf(); for others cases, added terminating NUL bytes where
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* appropriate, replaced constants like "16" with sizeof(), etc.
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*
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* These changes include several bug fixes, but most changes are for
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* maintainability's sake. Any instance where it wasn't "immediately
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* obvious" that a buffer overflow could not occur was made safer.
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*
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* Reviewed by: Bruce Evans <bde@zeta.org.au>
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* Reviewed by: Matthew Dillon <dillon@apollo.backplane.com>
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* Reviewed by: Mike Spengler <mks@networkcs.com>
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*
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* Revision 1.9 1998/11/16 19:48:26 rvb
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* A few bug fixes for Robert Watson
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*
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* Revision 1.8 1998/11/03 08:55:06 peter
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* Support KLD. We register and unregister two modules. "coda" (the vfs)
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* via VFS_SET(), and "codadev" for the cdevsw entry. From kldstat -v:
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* 3 1 0xf02c5000 115d8 coda.ko
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* Contains modules:
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* Id Name
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* 2 codadev
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* 3 coda
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*
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* Revision 1.7 1998/09/29 20:19:45 rvb
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* Fixes for lkm:
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* 1. use VFS_LKM vs ACTUALLY_LKM_NOT_KERNEL
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* 2. don't pass -DCODA to lkm build
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*
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* Revision 1.6 1998/09/25 17:38:32 rvb
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* Put "stray" printouts under DIAGNOSTIC. Make everything build
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* with DEBUG on. Add support for lkm. (The macro's don't work
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* for me; for a good chuckle look at the end of coda_fbsd.c.)
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*
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* Revision 1.5 1998/09/13 13:57:59 rvb
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* Finish conversion of cfs -> coda
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*
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* Revision 1.4 1998/09/11 18:50:17 rvb
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* All the references to cfs, in symbols, structs, and strings
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* have been changed to coda. (Same for CFS.)
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*
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* Revision 1.2 1998/09/02 19:09:53 rvb
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* Pass2 complete
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*
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* Revision 1.1.1.1 1998/08/29 21:14:52 rvb
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* Very Preliminary Coda
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*
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* Revision 1.11 1998/08/28 18:12:22 rvb
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* Now it also works on FreeBSD -current. This code will be
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* committed to the FreeBSD -current and NetBSD -current
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* trees. It will then be tailored to the particular platform
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* by flushing conditional code.
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*
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* Revision 1.10 1998/08/18 17:05:19 rvb
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* Don't use __RCSID now
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*
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* Revision 1.9 1998/08/18 16:31:44 rvb
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* Sync the code for NetBSD -current; test on 1.3 later
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*
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* Revision 1.8 98/02/24 22:22:48 rvb
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* Fixes up mainly to flush iopen and friends
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*
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* Revision 1.7 98/01/23 11:53:45 rvb
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* Bring RVB_CODA1_1 to HEAD
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*
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* Revision 1.6.2.6 98/01/23 11:21:07 rvb
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* Sync with 2.2.5
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*
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* Revision 1.6.2.5 98/01/22 13:05:33 rvb
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* Move make_coda_node ctlfid later so vfsp is known
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*
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* Revision 1.6.2.4 97/12/19 14:26:05 rvb
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* session id
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*
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* Revision 1.6.2.3 97/12/16 12:40:11 rvb
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* Sync with 1.3
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*
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* Revision 1.6.2.2 97/12/10 11:40:25 rvb
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* No more ody
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*
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* Revision 1.6.2.1 97/12/06 17:41:24 rvb
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* Sync with peters coda.h
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*
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* Revision 1.6 97/12/05 10:39:21 rvb
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* Read CHANGES
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*
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* Revision 1.5.14.8 97/11/24 15:44:46 rvb
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* Final cfs_venus.c w/o macros, but one locking bug
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*
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* Revision 1.5.14.7 97/11/21 13:22:03 rvb
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* Catch a few coda_calls in coda_vfsops.c
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*
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* Revision 1.5.14.6 97/11/20 11:46:48 rvb
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* Capture current cfs_venus
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*
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* Revision 1.5.14.5 97/11/18 10:27:17 rvb
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* cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
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* cfs_nb_foo and cfs_foo are joined
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*
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* Revision 1.5.14.4 97/11/13 22:03:01 rvb
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* pass2 cfs_NetBSD.h mt
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*
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* Revision 1.5.14.3 97/11/12 12:09:40 rvb
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* reorg pass1
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*
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* Revision 1.5.14.2 97/10/29 16:06:28 rvb
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* Kill DYING
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*
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* Revision 1.5.14.1 1997/10/28 23:10:17 rvb
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* >64Meg; venus can be killed!
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*
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* Revision 1.5 1997/01/13 17:11:07 bnoble
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* Coda statfs needs to return something other than -1 for blocks avail. and
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* files available for wabi (and other windowsish) programs to install
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* there correctly.
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*
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* Revision 1.4 1996/12/12 22:11:00 bnoble
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* Fixed the "downcall invokes venus operation" deadlock in all known cases.
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* There may be more
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*
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* Revision 1.3 1996/11/08 18:06:12 bnoble
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* Minor changes in vnode operation signature, VOP_UPDATE signature, and
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* some newly defined bits in the include files.
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*
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* Revision 1.2 1996/01/02 16:57:04 bnoble
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* Added support for Coda MiniCache and raw inode calls (final commit)
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*
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* Revision 1.1.2.1 1995/12/20 01:57:32 bnoble
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* Added CODA-specific files
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*
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* Revision 3.1.1.1 1995/03/04 19:08:02 bnoble
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* Branch for NetBSD port revisions
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*
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* Revision 3.1 1995/03/04 19:08:01 bnoble
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* Bump to major revision 3 to prepare for NetBSD port
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*
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* Revision 2.4 1995/02/17 16:25:22 dcs
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* These versions represent several changes:
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* 1. Allow venus to restart even if outstanding references exist.
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* 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d
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* 3. Allow ody_expand to return many members, not just one.
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*
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* Revision 2.3 94/10/14 09:58:21 dcs
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* Made changes 'cause sun4s have braindead compilers
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*
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* Revision 2.2 94/10/12 16:46:33 dcs
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* Cleaned kernel/venus interface by removing XDR junk, plus
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* so cleanup to allow this code to be more easily ported.
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*
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* Revision 1.3 93/05/28 16:24:29 bnoble
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* *** empty log message ***
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*
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* Revision 1.2 92/10/27 17:58:24 lily
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* merge kernel/latest and alpha/src/cfs
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*
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* Revision 2.3 92/09/30 14:16:32 mja
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* Added call to coda_flush to coda_unmount.
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* [90/12/15 dcs]
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*
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* Added contributors blurb.
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* [90/12/13 jjk]
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*
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* Revision 2.2 90/07/05 11:26:40 mrt
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* Created for the Coda File System.
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* [90/05/23 dcs]
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*
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* Revision 1.3 90/05/31 17:01:42 dcs
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* Prepare for merge with facilities kernel.
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*
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*
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*/
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#include <vcoda.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <sys/namei.h>
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#include <sys/mount.h>
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#include <sys/select.h>
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#include <coda/coda.h>
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#include <coda/cnode.h>
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#include <coda/coda_vfsops.h>
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#include <coda/coda_venus.h>
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#include <coda/coda_subr.h>
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#include <coda/coda_opstats.h>
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#include <miscfs/specfs/specdev.h>
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MALLOC_DEFINE(M_CODA, "CODA storage", "Various Coda Structures");
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int codadebug = 0;
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int coda_vfsop_print_entry = 0;
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#define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
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struct vnode *coda_ctlvp;
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struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */
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/* structure to keep statistics of internally generated/satisfied calls */
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struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE];
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#define MARK_ENTRY(op) (coda_vfsopstats[op].entries++)
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#define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++)
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#define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++)
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#define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++)
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extern int coda_nc_initialized; /* Set if cache has been initialized */
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extern int vc_nb_open __P((dev_t, int, int, struct proc *));
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int
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coda_vfsopstats_init(void)
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{
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register int i;
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for (i=0;i<CODA_VFSOPS_SIZE;i++) {
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coda_vfsopstats[i].opcode = i;
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coda_vfsopstats[i].entries = 0;
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coda_vfsopstats[i].sat_intrn = 0;
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coda_vfsopstats[i].unsat_intrn = 0;
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coda_vfsopstats[i].gen_intrn = 0;
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}
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return 0;
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}
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/*
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* cfs mount vfsop
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* Set up mount info record and attach it to vfs struct.
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*/
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/*ARGSUSED*/
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int
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coda_mount(vfsp, path, data, ndp, p)
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struct mount *vfsp; /* Allocated and initialized by mount(2) */
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char *path; /* path covered: ignored by the fs-layer */
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caddr_t data; /* Need to define a data type for this in netbsd? */
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struct nameidata *ndp; /* Clobber this to lookup the device name */
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struct proc *p; /* The ever-famous proc pointer */
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{
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struct vnode *dvp;
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struct cnode *cp;
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dev_t dev;
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struct coda_mntinfo *mi;
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struct vnode *rootvp;
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ViceFid rootfid;
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ViceFid ctlfid;
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int error;
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ENTRY;
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coda_vfsopstats_init();
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coda_vnodeopstats_init();
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MARK_ENTRY(CODA_MOUNT_STATS);
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if (CODA_MOUNTED(vfsp)) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return(EBUSY);
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}
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/* Validate mount device. Similar to getmdev(). */
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p);
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error = namei(ndp);
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dvp = ndp->ni_vp;
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if (error) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return (error);
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}
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if (dvp->v_type != VCHR) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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vrele(dvp);
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return(ENXIO);
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}
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dev = dvp->v_specinfo->si_rdev;
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vrele(dvp);
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if (major(dev) >= nchrdev || major(dev) < 0) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return(ENXIO);
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}
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/*
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* See if the device table matches our expectations.
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*/
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if (devsw(dev)->d_open != vc_nb_open)
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{
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return(ENXIO);
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}
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if (minor(dev) >= NVCODA || minor(dev) < 0) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return(ENXIO);
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}
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/*
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* Initialize the mount record and link it to the vfs struct
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*/
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mi = &coda_mnttbl[minor(dev)];
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if (!VC_OPEN(&mi->mi_vcomm)) {
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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return(ENODEV);
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}
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/* No initialization (here) of mi_vcomm! */
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vfsp->mnt_data = (qaddr_t)mi;
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vfs_getnewfsid (vfsp);
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mi->mi_vfsp = vfsp;
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/*
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* Make a root vnode to placate the Vnode interface, but don't
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* actually make the CODA_ROOT call to venus until the first call
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* to coda_root in case a server is down while venus is starting.
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*/
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rootfid.Volume = 0;
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rootfid.Vnode = 0;
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rootfid.Unique = 0;
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cp = make_coda_node(&rootfid, vfsp, VDIR);
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rootvp = CTOV(cp);
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rootvp->v_flag |= VROOT;
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ctlfid.Volume = CTL_VOL;
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ctlfid.Vnode = CTL_VNO;
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ctlfid.Unique = CTL_UNI;
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/* cp = make_coda_node(&ctlfid, vfsp, VCHR);
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The above code seems to cause a loop in the cnode links.
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I don't totally understand when it happens, it is caught
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when closing down the system.
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*/
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cp = make_coda_node(&ctlfid, 0, VCHR);
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coda_ctlvp = CTOV(cp);
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/* Add vfs and rootvp to chain of vfs hanging off mntinfo */
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mi->mi_vfsp = vfsp;
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mi->mi_rootvp = rootvp;
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/* set filesystem block size */
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vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */
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/* Set f_iosize. XXX -- inamura@isl.ntt.co.jp.
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For vnode_pager_haspage() references. The value should be obtained
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from underlying UFS. */
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/* Checked UFS. iosize is set as 8192 */
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vfsp->mnt_stat.f_iosize = 8192;
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/* error is currently guaranteed to be zero, but in case some
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code changes... */
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CODADEBUG(1,
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myprintf(("coda_mount returned %d\n",error)););
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if (error)
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MARK_INT_FAIL(CODA_MOUNT_STATS);
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else
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MARK_INT_SAT(CODA_MOUNT_STATS);
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return(error);
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}
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int
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coda_start(vfsp, flags, p)
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struct mount *vfsp;
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int flags;
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struct proc *p;
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{
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ENTRY;
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return (0);
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}
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int
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coda_unmount(vfsp, mntflags, p)
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struct mount *vfsp;
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int mntflags;
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struct proc *p;
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{
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struct coda_mntinfo *mi = vftomi(vfsp);
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int active, error = 0;
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ENTRY;
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MARK_ENTRY(CODA_UMOUNT_STATS);
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if (!CODA_MOUNTED(vfsp)) {
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MARK_INT_FAIL(CODA_UMOUNT_STATS);
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return(EINVAL);
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}
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if (mi->mi_vfsp == vfsp) { /* We found the victim */
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if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
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return (EBUSY); /* Venus is still running */
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#ifdef DEBUG
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printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
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#endif
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vrele(mi->mi_rootvp);
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active = coda_kill(vfsp, NOT_DOWNCALL);
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mi->mi_rootvp->v_flag &= ~VROOT;
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error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE);
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printf("coda_unmount: active = %d, vflush active %d\n", active, error);
|
|
error = 0;
|
|
/* I'm going to take this out to allow lookups to go through. I'm
|
|
* not sure it's important anyway. -- DCS 2/2/94
|
|
*/
|
|
/* vfsp->VFS_DATA = NULL; */
|
|
|
|
/* No more vfsp's to hold onto */
|
|
mi->mi_vfsp = NULL;
|
|
mi->mi_rootvp = NULL;
|
|
|
|
if (error)
|
|
MARK_INT_FAIL(CODA_UMOUNT_STATS);
|
|
else
|
|
MARK_INT_SAT(CODA_UMOUNT_STATS);
|
|
|
|
return(error);
|
|
}
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* find root of cfs
|
|
*/
|
|
int
|
|
coda_root(vfsp, vpp)
|
|
struct mount *vfsp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct coda_mntinfo *mi = vftomi(vfsp);
|
|
struct vnode **result;
|
|
int error;
|
|
struct proc *p = curproc; /* XXX - bnoble */
|
|
ViceFid VFid;
|
|
|
|
ENTRY;
|
|
MARK_ENTRY(CODA_ROOT_STATS);
|
|
result = NULL;
|
|
|
|
if (vfsp == mi->mi_vfsp) {
|
|
if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) ||
|
|
(VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) ||
|
|
(VTOC(mi->mi_rootvp)->c_fid.Unique != 0))
|
|
{ /* Found valid root. */
|
|
*vpp = mi->mi_rootvp;
|
|
/* On Mach, this is vref. On NetBSD, VOP_LOCK */
|
|
#if 1
|
|
vref(*vpp);
|
|
vn_lock(*vpp, LK_EXCLUSIVE, p);
|
|
#else
|
|
vget(*vpp, LK_EXCLUSIVE, p);
|
|
#endif
|
|
MARK_INT_SAT(CODA_ROOT_STATS);
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid);
|
|
|
|
if (!error) {
|
|
/*
|
|
* Save the new rootfid in the cnode, and rehash the cnode into the
|
|
* cnode hash with the new fid key.
|
|
*/
|
|
coda_unsave(VTOC(mi->mi_rootvp));
|
|
VTOC(mi->mi_rootvp)->c_fid = VFid;
|
|
coda_save(VTOC(mi->mi_rootvp));
|
|
|
|
*vpp = mi->mi_rootvp;
|
|
#if 1
|
|
vref(*vpp);
|
|
vn_lock(*vpp, LK_EXCLUSIVE, p);
|
|
#else
|
|
vget(*vpp, LK_EXCLUSIVE, p);
|
|
#endif
|
|
|
|
MARK_INT_SAT(CODA_ROOT_STATS);
|
|
goto exit;
|
|
} else if (error == ENODEV || error == EINTR) {
|
|
/* Gross hack here! */
|
|
/*
|
|
* If Venus fails to respond to the CODA_ROOT call, coda_call returns
|
|
* ENODEV. Return the uninitialized root vnode to allow vfs
|
|
* operations such as unmount to continue. Without this hack,
|
|
* there is no way to do an unmount if Venus dies before a
|
|
* successful CODA_ROOT call is done. All vnode operations
|
|
* will fail.
|
|
*/
|
|
*vpp = mi->mi_rootvp;
|
|
#if 1
|
|
vref(*vpp);
|
|
vn_lock(*vpp, LK_EXCLUSIVE, p);
|
|
#else
|
|
vget(*vpp, LK_EXCLUSIVE, p);
|
|
#endif
|
|
|
|
MARK_INT_FAIL(CODA_ROOT_STATS);
|
|
error = 0;
|
|
goto exit;
|
|
} else {
|
|
CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); );
|
|
MARK_INT_FAIL(CODA_ROOT_STATS);
|
|
|
|
goto exit;
|
|
}
|
|
|
|
exit:
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
coda_quotactl(vfsp, cmd, uid, arg, p)
|
|
struct mount *vfsp;
|
|
int cmd;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
ENTRY;
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Get file system statistics.
|
|
*/
|
|
int
|
|
coda_nb_statfs(vfsp, sbp, p)
|
|
register struct mount *vfsp;
|
|
struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
ENTRY;
|
|
/* MARK_ENTRY(CODA_STATFS_STATS); */
|
|
if (!CODA_MOUNTED(vfsp)) {
|
|
/* MARK_INT_FAIL(CODA_STATFS_STATS);*/
|
|
return(EINVAL);
|
|
}
|
|
|
|
bzero(sbp, sizeof(struct statfs));
|
|
/* XXX - what to do about f_flags, others? --bnoble */
|
|
/* Below This is what AFS does
|
|
#define NB_SFS_SIZ 0x895440
|
|
*/
|
|
/* Note: Normal fs's have a bsize of 0x400 == 1024 */
|
|
sbp->f_type = vfsp->mnt_vfc->vfc_typenum;
|
|
sbp->f_bsize = 8192; /* XXX */
|
|
sbp->f_iosize = 8192; /* XXX */
|
|
#define NB_SFS_SIZ 0x8AB75D
|
|
sbp->f_blocks = NB_SFS_SIZ;
|
|
sbp->f_bfree = NB_SFS_SIZ;
|
|
sbp->f_bavail = NB_SFS_SIZ;
|
|
sbp->f_files = NB_SFS_SIZ;
|
|
sbp->f_ffree = NB_SFS_SIZ;
|
|
bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
|
|
snprintf(sbp->f_mntonname, sizeof(sbp->f_mntonname), "/coda");
|
|
snprintf(sbp->f_mntfromname, sizeof(sbp->f_mntfromname), "CODA");
|
|
/* MARK_INT_SAT(CODA_STATFS_STATS); */
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Flush any pending I/O.
|
|
*/
|
|
int
|
|
coda_sync(vfsp, waitfor, cred, p)
|
|
struct mount *vfsp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
ENTRY;
|
|
MARK_ENTRY(CODA_SYNC_STATS);
|
|
MARK_INT_SAT(CODA_SYNC_STATS);
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
coda_vget(vfsp, ino, vpp)
|
|
struct mount *vfsp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
ENTRY;
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* fhtovp is now what vget used to be in 4.3-derived systems. For
|
|
* some silly reason, vget is now keyed by a 32 bit ino_t, rather than
|
|
* a type-specific fid.
|
|
*/
|
|
int
|
|
coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
|
|
register struct mount *vfsp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **creadanonp;
|
|
{
|
|
struct cfid *cfid = (struct cfid *)fhp;
|
|
struct cnode *cp = 0;
|
|
int error;
|
|
struct proc *p = curproc; /* XXX -mach */
|
|
ViceFid VFid;
|
|
int vtype;
|
|
|
|
ENTRY;
|
|
|
|
MARK_ENTRY(CODA_VGET_STATS);
|
|
/* Check for vget of control object. */
|
|
if (IS_CTL_FID(&cfid->cfid_fid)) {
|
|
*vpp = coda_ctlvp;
|
|
vref(coda_ctlvp);
|
|
MARK_INT_SAT(CODA_VGET_STATS);
|
|
return(0);
|
|
}
|
|
|
|
error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype);
|
|
|
|
if (error) {
|
|
CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)
|
|
*vpp = (struct vnode *)0;
|
|
} else {
|
|
CODADEBUG(CODA_VGET,
|
|
myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n",
|
|
VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); )
|
|
|
|
cp = make_coda_node(&VFid, vfsp, vtype);
|
|
*vpp = CTOV(cp);
|
|
}
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
coda_vptofh(vnp, fidp)
|
|
struct vnode *vnp;
|
|
struct fid *fidp;
|
|
{
|
|
ENTRY;
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
int
|
|
coda_init(struct vfsconf *vfsp)
|
|
{
|
|
ENTRY;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* To allow for greater ease of use, some vnodes may be orphaned when
|
|
* Venus dies. Certain operations should still be allowed to go
|
|
* through, but without propagating ophan-ness. So this function will
|
|
* get a new vnode for the file from the current run of Venus. */
|
|
|
|
int
|
|
getNewVnode(vpp)
|
|
struct vnode **vpp;
|
|
{
|
|
struct cfid cfid;
|
|
struct coda_mntinfo *mi = vftomi((*vpp)->v_mount);
|
|
|
|
ENTRY;
|
|
|
|
cfid.cfid_len = (short)sizeof(ViceFid);
|
|
cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */
|
|
/* XXX ? */
|
|
|
|
/* We're guessing that if set, the 1st element on the list is a
|
|
* valid vnode to use. If not, return ENODEV as venus is dead.
|
|
*/
|
|
if (mi->mi_vfsp == NULL)
|
|
return ENODEV;
|
|
|
|
return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
|
|
NULL, NULL);
|
|
}
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
/* get the mount structure corresponding to a given device. Assume
|
|
* device corresponds to a UFS. Return NULL if no device is found.
|
|
*/
|
|
struct mount *devtomp(dev)
|
|
dev_t dev;
|
|
{
|
|
struct mount *mp, *nmp;
|
|
|
|
for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
if (((VFSTOUFS(mp))->um_dev == dev)) {
|
|
/* mount corresponds to UFS and the device matches one we want */
|
|
return(mp);
|
|
}
|
|
}
|
|
/* mount structure wasn't found */
|
|
return(NULL);
|
|
}
|
|
|
|
struct vfsops coda_vfsops = {
|
|
coda_mount,
|
|
coda_start,
|
|
coda_unmount,
|
|
coda_root,
|
|
coda_quotactl,
|
|
coda_nb_statfs,
|
|
coda_sync,
|
|
coda_vget,
|
|
(int (*) (struct mount *, struct fid *, struct sockaddr *, struct vnode **,
|
|
int *, struct ucred **))
|
|
eopnotsupp,
|
|
(int (*) (struct vnode *, struct fid *)) eopnotsupp,
|
|
coda_init,
|
|
};
|
|
|
|
VFS_SET(coda_vfsops, coda, VFCF_NETWORK);
|