Cross Reference: /src/sys/miscfs/genfs/genfs

History log of /src/sys/miscfs/genfs/genfs_vnops.c
Revision	Date	Author	Comments
1.220	03-Mar-2023	hannken	Fix genfs_can_chtimes() to also handle the condition: If the time pointer is null, then write permission on the file is also sufficient. From FreeBSD. Should fix PR kern/57246 "NFS group permissions regression"
1.219	27-Mar-2022	christos	branches: 1.219.4; dedup the eofs link/symlink methods
1.218	27-Mar-2022	christos	Expose groupmember as kauth_cred_groupmember and use it.
1.217	19-Mar-2022	hannken	Remove now unused genfs_nolock(), genfs_nounlock() and genfs_noislocked().
1.216	20-Oct-2021	thorpej	Overhaul of the EVFILT_VNODE kevent(2) filter: - Centralize vnode kevent handling in the VOP_() wrappers, rather than forcing each individual file system to deal with it (except VOP_RENAME(), because VOP_RENAME() is a mess and we currently have 2 different ways of handling it; at least it's reasonably well-centralized in the "new" way). - Add support for NOTE_OPEN, NOTE_CLOSE, NOTE_CLOSE_WRITE, and NOTE_READ, compatible with the same events in FreeBSD. - Track which kevent notifications clients are interested in receiving to avoid doing work for events no one cares about (avoiding, e.g. taking locks and traversing the klist to send a NOTE_WRITE when someone is merely watching for a file to be deleted, for example). In support of the above: - Add support in vnode_if.sh for specifying PRE- and POST-op handlers, to be invoked before and after vop_pre() and vop_post(), respectively. Basic idea from FreeBSD, but implemented differently. - Add support in vnode_if.sh for specifying CONTEXT fields in the vop__args structures. These context fields are used to convey information between the file system VOP function and the VOP wrapper, but do not occupy an argument slot in the VOP_*() call itself. These context fields are initialized and subsequently interpreted by PRE- and POST-op handlers. - Version VOP_REMOVE(), uses the a context field for the file system to report back the resulting link count of the target vnode. Return this in tmpfs, udf, nfs, chfs, ext2fs, lfs, and ufs. NetBSD 9.99.92.
1.215	11-Oct-2021	thorpej	Mark the EVFILT_VNODE filters MP-safe.
1.214	11-Oct-2021	thorpej	Setting EV_EOF requires modifying kn->kn_flags. However, that relies on holding the kq_lock of that note's kq. Rather than exposing this directly, add new knote_set_eof() and knote_clear_eof() functions that handle the necessary locking and don't leak as many implementation details to modules. NetBSD 9.99.91
1.213	10-Oct-2021	thorpej	Must hold kn->kn_kq->kq_lock to modify kn->kn_flags.
1.212	26-Sep-2021	thorpej	Change the kqueue filterops::f_isfd field to filterops::f_flags, and define a flag FILTEROP_ISFD that has the meaning of the prior f_isfd. Field and flag name aligned with OpenBSD. This does not constitute a functional or ABI change, as the field location and size, and the value placed in that field, are the same as the previous code, but we're bumping __NetBSD_Version__ so 3rd-party module source code can adapt, as needed. NetBSD 9.99.89
1.211	29-Jun-2021	dholland	- Add a new vnode op: VOP_PARSEPATH. - Move namei_getcomponent to genfs_vnops.c and call it genfs_parsepath. - Add a parsepath entry to every vnode ops table. VOP_PARSEPATH takes a directory vnode to be searched and a complete following path and chooses how much of that path to consume. To begin with, all parsepath calls are genfs_parsepath, which locates the first '/' as always. Note that the call doesn't take the whole struct componentname, only the string. The other bits of struct componentname should not be needed and there's no reason to cause potential complications by exposing them.
1.210	05-Sep-2020	riastradh	branches: 1.210.6; Round of uvm.h cleanup. The poorly named uvm.h is generally supposed to be for uvm-internal users only. - Narrow it to files that actually need it -- mostly files that need to query whether curlwp is the pagedaemon, which should maybe be exposed by an external header. - Use uvm_extern.h where feasible and uvm_*.h for things not exposed by it. We should split up uvm_extern.h but this will serve for now to reduce the uvm.h dependencies. - Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use UVMHIST(ubchist), since ubchist is declared in uvm.h but the reference evaporates if UVMHIST is not defined, so we reduce header file dependencies. - Make uvm_device.h and uvm_swap.h independently includable while here. ok chs@
1.209	07-Aug-2020	christos	accmode should be accmode_t
1.208	27-Jun-2020	christos	Introduce genfs_pathconf() and use it for the default case in all filesystems.
1.207	20-May-2020	christos	Fix EPERM vs EACCES on chtimes (thanks @hannken)
1.206	18-May-2020	christos	remove debugging, it is just clutter.
1.205	18-May-2020	christos	Fix EPERM vs EACCES return.
1.204	16-May-2020	christos	Add ACL support for FFS. From FreeBSD.
1.203	25-Apr-2020	christos	Allow root to access and modify system space extended attributes. XXX: this routine should not be using the string, but the attribute namespace. I have fixed this in the ACL code.
1.202	23-Feb-2020	ad	Merge from ad-namecache: - Have a stab at clustering the members of vnode_t and vnode_impl_t in a more cache-conscious way. With that done, go back to adjusting v_usecount with atomics and keep vi_lock directly in vnode_impl_t (saves KVA). - Allow VOP_LOCK(LK_NONE) for the benefit of VFS_VGET() and VFS_ROOT(). Make sure LK_UPGRADE always comes with LK_NOWAIT. - Make cwdinfo use mostly lockless.
1.201	23-Feb-2020	ad	UVM locking changes, proposed on tech-kern: - Change the lock on uvm_object, vm_amap and vm_anon to be a RW lock. - Break v_interlock and vmobjlock apart. v_interlock remains a mutex. - Do partial PV list locking in the x86 pmap. Others to follow later.
1.200	01-Dec-2019	ad	branches: 1.200.2; Minor vnode locking changes: - Stop using atomics to maniupulate v_usecount. It was a mistake to begin with. It doesn't work as intended unless the XLOCK bit is incorporated in v_usecount and we don't have that any more. When I introduced this 10+ years ago it was to reduce pressure on v_interlock but it doesn't do that, it just makes stuff disappear from lockstat output and introduces problems elsewhere. We could do atomic usecounts on vnodes but there has to be a well thought out scheme. - Resurrect LK_UPGRADE/LK_DOWNGRADE which will be needed to work effectively when there is increased use of shared locks on vnodes. - Allocate the vnode lock using rw_obj_alloc() to reduce false sharing of struct vnode. - Put all of the LRU lists into a single cache line, and do not requeue a vnode if it's already on the correct list and was requeued recently (less than a second ago). Kernel build before and after: 119.63s real 1453.16s user 2742.57s system 115.29s real 1401.52s user 2690.94s system
1.199	25-Oct-2017	maya	branches: 1.199.4; Use C99 initializer for filterops Mostly done with spatch with touchups for indentation @@ expression a; identifier b,c,d; identifier p; @@ const struct filterops p = - { a, b, c, d + { + .f_isfd = a, + .f_attach = b, + .f_detach = c, + .f_event = d, };
1.198	01-Jul-2017	christos	Provide EVFILT_WRITE; this is what FreeBSD does and go wants it. Makes go unit tests pass.
1.197	04-Jun-2017	hannken	Locking a layer vnode using the regular bypass routine is no longer racy. Undo the change from 2017-03-30 11:16:52, commitid eurqbzuGxGRlryLz and make vi_lock a krwlock_t again.
1.196	04-Jun-2017	hannken	Now that FSTRANS is part of VOP_LOCK() remove FSTRANS and vdead_check() from genfs_.lock() and assert the vnode state once the vnode is locked.
1.195	11-Apr-2017	riastradh	branches: 1.195.4; Eliminate now-unused WILLUNLOCK vop flag.
1.194	30-Mar-2017	hannken	Locking a layer vnode is racy as it may become reclaimed before calling the operation on the lower vnode. Replace vi_lock with a rw_obj and change layered file systems to share the lock with the lower vnode. Layered file systems now use genfs_lock()/_unlock/_islocked(). Welcome to 7.99.67
1.193	11-Jan-2017	hannken	branches: 1.193.2; Move vnode member v_lock as vi_lock to vnode_impl.h.
1.192	24-Mar-2014	hannken	branches: 1.192.4; 1.192.6; 1.192.8; 1.192.10; 1.192.14; - Make VI_XLOCK, VI_CLEAN and VI_LOCKSHARE private to kern/vfs_*.c. - Make vwait() static. - Add vdead_check() to check a vnode for being or becoming dead. Discussed on tech-kern. Welcome to 6.99.38
1.191	12-Mar-2014	hannken	Restructure genfs_deadlock() and genfs_lock() to always lock before testing for dead node. Use ISSET() to test flags, add assertions. Save the mount for fstrans_done() before genfs_unlock() unlocks the node.
1.190	27-Feb-2014	hannken	The current implementation of vn_lock() is racy. Modification of the vnode operations vector for active vnodes is unsafe because it is not known whether deadfs or the original file system will be called. - Pass down LK_RETRY to the lock operation (hint for deadfs only). - Change deadfs lock operation to return ENOENT if LK_RETRY is unset. - Change all other lock operations to check for dead vnode once the vnode is locked and unlock and return ENOENT in this case. With these changes in place vnode lock operations will never succeed after vclean() has marked the vnode as VI_XLOCK and before vclean() has changed the operations vector. Adresses PR kern/37706 (Forced unmount of file systems is unsafe) Discussed on tech-kern. Welcome to 6.99.33
1.189	30-Mar-2012	njoly	branches: 1.189.2; 1.189.4; uid mismatch for file flags changes is expected to fail with EPERM not EACCES.
1.188	13-Mar-2012	elad	Replace the remaining KAUTH_GENERIC_ISSUSER authorization calls with something meaningful. All relevant documentation has been updated or written. Most of these changes were brought up in the following messages: http://mail-index.netbsd.org/tech-kern/2012/01/18/msg012490.html http://mail-index.netbsd.org/tech-kern/2012/01/19/msg012502.html http://mail-index.netbsd.org/tech-kern/2012/02/17/msg012728.html Thanks to christos, manu, njoly, and jmmv for input. Huge thanks to pgoyette for spinning these changes through some build cycles and ATF.
1.187	12-Jun-2011	rmind	branches: 1.187.2; 1.187.6; Welcome to 5.99.53! Merge rmind-uvmplock branch: - Reorganize locking in UVM and provide extra serialisation for pmap(9). New lock order: [vmpage-owner-lock] -> pmap-lock. - Simplify locking in some pmap(9) modules by removing P->V locking. - Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs). - Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner. Add TLBSTATS option for x86 to collect statistics about TLB shootdowns. - Unify /dev/mem et al in MI code and provide required locking (removes kernel-lock on some ports). Also, avoid cache-aliasing issues. Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches formed the core changes of this branch.
1.186	27-Dec-2010	hannken	branches: 1.186.6; Extend the range of fstrans transactions to a sequence of vnode operations on a locked vnode. This leaves a suspended file system and therefore a snapshot with either all or no operations of such a sequence done.
1.185	30-Nov-2010	dholland	Abolish the SAVENAME and HASBUF flags. There is now always a buffer, so the path in a struct componentname is now always valid during VOP calls.
1.184	30-Nov-2010	dholland	Abolish struct componentname's cn_pnbuf. Use the path buffer in the pathbuf object passed to namei as work space instead. (For now a pnbuf pointer appears in struct nameidata, to support certain unclean things that haven't been fixed yet, but it will be going away in the future.) This removes the need for the SAVENAME and HASBUF namei flags.
1.183	01-Sep-2010	chs	replace the earlier workaround for PR 40389 with a better fix. the earlier change caused data corruption by freeing pages without invaliding their mappings. instead of the trylock/retry, just take the genfs-node lock before calling VOP_GETPAGES() and pass a new flag to tell it that we're already holding this lock.
1.182	01-Jul-2010	hannken	Remove vlockmgr(). Generic vnode lock operations now use a rwlock located in the vnode. All LK_* flags move from sys/lock.h to sys/vnode.h. Calls to vlockmgr() in file systems get replaced with VOP_LOCK() or VOP_UNLOCK(). Welcome to 5.99.34. Discussed on tech-kern.
1.181	24-Jun-2010	hannken	Clean up vnode lock operations pass 2: VOP_UNLOCK(vp, flags) -> VOP_UNLOCK(vp): Remove the unneeded flags argument. Welcome to 5.99.32. Discussed on tech-kern.
1.180	24-Jun-2010	hannken	genfs_nolock(): LK_INTERLOCK flag no longer possible.
1.179	24-Jun-2010	hannken	Clean up vnode lock operations: - VOP_LOCK(vp, flags): Limit the set of allowed flags to LK_EXCLUSIVE, LK_SHARED and LK_NOWAIT. LK_INTERLOCK is no longer allowed as it makes no sense here. - VOP_ISLOCKED(vp): Remove the for some time unused return value LK_EXCLOTHER. Mark this operation as "diagnostic only". Making a lock decision based on this operation is no longer allowed. Discussed on tech-kern.
1.178	06-Jun-2010	hannken	Change layered file systems to always pass the locking VOP's down to the leaf file system. Remove now unused member v_vnlock from struct vnode. Welcome to 5.99.30 Discussed on tech-kern.
1.177	08-Apr-2010	pooka	Call VOP_ABORTOP in genfs_eopnotsupp. This prevents file system authors from having to get down on their knees and pray they won't get POGA'd() again. This plugs componentname leaks in at least smbfs and buggy puffs servers (buggy servers shouldn't be able to leak kernel memory). ) principle of greatest astonishment
1.176	27-Jan-2010	uebayasi	branches: 1.176.2; 1.176.4; Don't forget to tell the result of rw_tryenter().
1.175	27-Jan-2010	uebayasi	Add genfs_node_rdtrylock().
1.174	20-Nov-2009	roy	Allow chown if caller is in the new group.
1.173	20-Nov-2009	pooka	Disallow chown for files the caller does not own.
1.172	23-Jun-2009	elad	Move the implementation of vaccess() to genfs_can_access(), in line with the other routines of the same spirit. Adjust file-system code to use it. Keep vaccess() for KPI compatibility and to keep element of least surprise. A "diagnostic" message warning that vaccess() is deprecated will be printed when it's used (obviously, only in DIAGNOSTIC kernels). No objections on tech-kern@: http://mail-index.netbsd.org/tech-kern/2009/06/21/msg005310.html
1.171	07-May-2009	elad	Extract the open-coded authorization logic for chtimes() from various file-systems and put it in a single function, genfs_can_chtimes(). This also makes UDF follow the same policy as all other file-systems. Mailing list reference: http://mail-index.netbsd.org/tech-kern/2009/04/27/msg004951.html
1.170	25-Apr-2009	elad	Add genfs_can_mount() and use it to prevent some more code duplication of the security checks when mounting a device (VOP_ACCESS() + kauth(9) call)). Proposed with no objections on tech-kern@: http://mail-index.netbsd.org/tech-kern/2009/04/20/msg004859.html The vnode is always expected to be locked, so no locking is done outside the file-system code.
1.169	22-Apr-2009	elad	Per discussion on tech-kern@: - Replace use of label/goto with returns - Rename, change prototype of, and move functions from vfs_subr.c to genfs_vnops.c
1.168	18-Apr-2009	pooka	Move genfs_null_putpages() from genfs_io.c to genfs_vnops.c -- it does not really do i/o.
1.167	28-Apr-2008	martin	branches: 1.167.8; 1.167.10; 1.167.14; 1.167.16; 1.167.18; Remove clause 3 and 4 from TNF licenses
1.166	19-Apr-2008	hannken	branches: 1.166.2; Remove stale include <sys/fstrans.h>.
1.165	21-Mar-2008	ad	branches: 1.165.2; Catch up with descriptor handling changes. See kern_descrip.c revision 1.173 for details.
1.164	05-Feb-2008	ad	branches: 1.164.6; Lock v_knlist with the vnode interlock. PR kern/37881.
1.163	30-Jan-2008	ad	Replace struct lock on vnodes with a simpler lock object built on krwlock_t. This is a step towards removing lockmgr and simplifying vnode locking. Discussed on tech-kern.
1.162	25-Jan-2008	riz	Since VOP_LEASE is gone, remove genfs_lease_check() too. Now my kernel builds again. :)
1.161	17-Jan-2008	ad	Fix v_freelisthd assertion failure during call to vdevdone(). No calling VOPs without a vnode reference!
1.160	02-Jan-2008	ad	Merge vmlocking2 to head.
1.159	05-Dec-2007	pooka	branches: 1.159.4; Do not "return 1" from kqfilter for errors. That value is passed directly to the userland caller and results in a mysterious EPERM. Instead, return EINVAL or something else sensible depending on the case.
1.158	17-Oct-2007	pooka	branches: 1.158.4; 1.158.6; Split I/O-related routines (getpages, putpages, etc.) which are heavily tied to uvm out of genfs_vnops into genfs_io.c
1.157	10-Oct-2007	ad	Merge from vmlocking: - Split vnode::v_flag into three fields, depending on field locking. - simple_lock -> kmutex in a few places. - Fix some simple locking problems.
1.156	29-Jul-2007	ad	branches: 1.156.4; 1.156.6; 1.156.8; 1.156.10; It's not a good idea for device drivers to modify b_flags, as they don't need to understand the locking around that field. Instead of setting B_ERROR, set b_error instead. b_error is 'owned' by whoever completes the I/O request.
1.155	09-Jul-2007	ad	branches: 1.155.2; Merge some of the less invasive changes from the vmlocking branch: - kthread, callout, devsw API changes - select()/poll() improvements - miscellaneous MT safety improvements
1.154	05-Jun-2007	yamt	improve post-ubc file overwrite performance in common cases. ie. when it's safe, actually overwrite blocks rather than doing read-modify-write. also fixes PR/33152 and PR/36303.
1.153	17-May-2007	hannken	Fstrans_start() always returns zero, so change its type to void.
1.152	13-May-2007	yamt	use a cached value of v_size. no functional changes.
1.151	24-Apr-2007	perseant	Split the VOP interface part of genfs_putpages() from the code. The new function that does the work, genfs_do_putpages(), now takes as an argument a pointer to the page that would be waited on, if PGO_BUSYWAIT were not set. This allows a consumer, e.g. lfs_putpages(), to perform an action outside the scope of UVM before sleeping on the page in question.
1.150	04-Mar-2007	christos	branches: 1.150.2; 1.150.4; Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
1.149	22-Feb-2007	thorpej	TRUE -> true, FALSE -> false
1.148	21-Feb-2007	thorpej	Replace the Mach-derived boolean_t type with the C99 bool type. A future commit will replace use of TRUE and FALSE with true and false.
1.147	20-Feb-2007	ad	Add genfs_node_destroy(). Fixes a lock "leak" seen when running LOCKDEBUG kernels.
1.146	15-Feb-2007	ad	branches: 1.146.2; Replace some uses of lockmgr() / simplelocks.
1.145	09-Feb-2007	ad	Merge newlock2 to head.
1.144	29-Jan-2007	hannken	Change fstrans enum types to upper case. No functional change. From Antti Kantee <pooka@netbsd.org>
1.143	19-Jan-2007	hannken	New file system suspension API to replace vn_start_write and vn_finished_write. The suspension helpers are now put into file system specific operations. This means every file system not supporting these helpers cannot be suspended and therefore snapshots are no longer possible. Implemented for file systems of type ffs. The new API is enabled on a kernel option NEWVNGATE. This option is not enabled by default in any kernel config. Presented and discussed on tech-kern with much input from Bill Studenmund <wrstuden@netbsd.org> and YAMAMOTO Takashi <yamt@netbsd.org>. Welcome to 4.99.9 (new vfs op vfs_suspendctl).
1.142	27-Dec-2006	yamt	remove nqnfs.
1.141	15-Dec-2006	yamt	put ->K loaned pages on the page queue, so that page loaning doesn't disturb pagedaemon/pdpolicy.
1.140	30-Nov-2006	pooka	branches: 1.140.2; 1.140.4; * update comments before putpages(): the vm object is always returned unlocked instead of locked. chuq agrees * use slock set to &uobj->vmobjlock also for the last simple lock operation to be consistent with the rest of the function
1.139	25-Nov-2006	christos	instead of const int, use a #define which most of the time will evaluate in a compile-time constant.
1.138	16-Nov-2006	christos	__unused removal on arguments; approved by core.
1.137	20-Oct-2006	reinoud	Replace the LIST structure mp->mnt_vnodelist to a TAILQ structure since all vnodes were synced and processed backwards. This meant that the last accessed node was processed first and the earlierst last. An extra benefit is the removal of the ugly hack from the Berkly days on LFS. In the proces, i've also replaced the various variations hand written loops by the TAILQ_FOREACH() macro's.
1.136	14-Oct-2006	yamt	add wrapper functions of lockmgr on g_glock.
1.135	14-Oct-2006	yamt	genfs_getpages: use kmem_zalloc.
1.134	14-Oct-2006	yamt	genfs_do_io: iodone handler should be called at splbio.
1.133	12-Oct-2006	yamt	genfs_putpages: don't try to deactivate loaned pages. reported and tested by Nicolas Joly on current-users@.
1.132	12-Oct-2006	thorpej	genfs_lease_check(): Consume the arguments even if NFSSERVER is not defined.
1.131	12-Oct-2006	christos	- sprinkle __unused on function decls. - fix a couple of unused bugs - no more -Wno-unused for i386
1.130	05-Oct-2006	chs	add support for O_DIRECT (I/O directly to application memory, bypassing any kernel caching for file data).
1.129	15-Sep-2006	yamt	branches: 1.129.2; merge yamt-pdpolicy branch. - separate page replacement policy from the rest of kernel - implement an alternative replacement policy
1.128	23-Jul-2006	ad	branches: 1.128.4; Use the LWP cached credentials where sane.
1.127	22-Jul-2006	yamt	- genfs_getpages: in the case of PGO_LOCKED, check if we can acquire g_glock as suggested by Chuck Silvers on tech-kern@. - genfs_rel_pages: handle PGO_DONTCARE so that it can be used for the above.
1.126	22-Jul-2006	yamt	- in genfs_getpages, take g_glock earlier so that it can't be intervened by truncation. it also fixes a deadlock. (g_glock vs pages locking order) - uvm_vnp_setsize: modify v_size while holding v_interlock. reviewed by Chuck Silvers.
1.125	14-May-2006	elad	integrate kauth.
1.124	11-Apr-2006	yamt	genfs_getpages: - use "overwrite" variable consistently. - remove a set-only variable. no functional changes.
1.123	30-Mar-2006	yamt	some cleanups after the introduction of GOP_SIZE_MEM flag. - remove GOP_SIZE_READ/GOP_SIZE_WRITE flags. they have not been used since the change. - ufs_balloc_range: remove code which has been no-op since the change. thanks Konrad Schroder for explaining the original intention of the code. - ffs_gop_size: don't extend past eof, in the case of GOP_SIZE_MEM. otherwise genfs_getpages end up to allocate pages past eof unnecessarily.
1.122	01-Mar-2006	yamt	branches: 1.122.2; 1.122.4; 1.122.6; merge yamt-uio_vmspace branch. - use vmspace rather than proc or lwp where appropriate. the latter is more natural to specify an address space. (and less likely to be abused for random purposes.) - fix a swdmover race.
1.121	16-Jan-2006	reinoud	branches: 1.121.2; 1.121.4; Add genfs support for directories and softlinks next to regular files and block devices. Discussed on tech-kern and ok'd by Chuck
1.120	11-Jan-2006	yamt	use nestiobuf api for genfs.
1.119	04-Jan-2006	yamt	- add simple functions to allocate/free a buffer for i/o. - make bufpool static.
1.118	24-Dec-2005	perry	branches: 1.118.2; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.117	15-Dec-2005	yamt	fix lock/unlock mismatch in rev.1.115. reported by Chris Tribo on current-users@.
1.116	11-Dec-2005	christos	merge ktrace-lwp.
1.115	03-Dec-2005	yamt	genfs_compat_getpages: add minimum support of async get. ie. ignore them. should fix a crash reported by Jukka Salmi on current-users@.
1.114	02-Dec-2005	yamt	genfs_gop_write: use devvp directly as genfs_getpages does.
1.113	02-Dec-2005	yamt	genfs_putpages: initialize marker pages only when needed.
1.112	30-Nov-2005	yamt	revert rev.1.111 as it isn't necessary or correct. - currently no one in tree has a problem with zero b_lblkno, afaik. - this buf is used for "devvp", so it doesn't make sense to use lbn in the "vp".
1.111	30-Nov-2005	reinoud	Learn genfs that (struct buf *)->b_lblkno allways need to point to the logical block number of the file instead of allways zero.
1.110	29-Nov-2005	yamt	merge yamt-readahead branch.
1.109	12-Nov-2005	yamt	branches: 1.109.2; genfs_getpages: - add an assertion. - call VOP_STRATEGY of underlying vnode directly, rather than through the filesystem vnode. - no need to set b_dev here because VOP_STRATEGY will take care of it.
1.108	02-Nov-2005	yamt	merge yamt-vop branch. remove following VOPs. VOP_BLKATOFF VOP_VALLOC VOP_BALLOC VOP_REALLOCBLKS VOP_VFREE VOP_TRUNCATE VOP_UPDATE
1.107	07-Oct-2005	elad	branches: 1.107.2; Remove Veriexec bits from genfs, don't #if 0 them.
1.106	07-Oct-2005	elad	Various fixes from blymn@ and myself. Also, put genfs changes under #if 0, and don't do per-page fingerprints until this is properly discussed, as requested by yamt@.
1.105	05-Oct-2005	elad	Introduce per-page fingerprints in Veriexec. This closes a hole pointed out by Thor Lancelot Simon on tech-kern ~3 years ago. The problem was with running binaries from remote storage, where our kernel (and Veriexec) has no control over any changes to files. An attacker could, after the fingerprint has been verified and program loaded to memory, inject malicious code into the backing store on the remote storage, followed by a forced flush, causing a page-in of the malicious data from backing store, bypassing integrity checks. Initial implementation by Brett Lymn.
1.104	26-Jul-2005	yamt	don't write-protect wired pages. pointed by Chuck Silvers. for now, leave a vnode on the syncer's queue, as suggested by him.
1.103	23-Jul-2005	yamt	update file timestamps for nfsd loaned-read and mmap. PR/25279. discussed on tech-kern@.
1.102	17-Jul-2005	yamt	genfs_putpages: don't bother to clean the vnode unless VONWORKLST.
1.101	17-Jul-2005	yamt	ensure that vnodes with dirty pages are always on syncer's queue. - genfs_putpages: wait for i/o completion of PG_RELEASED/PG_PAGEOUT pages by setting "wasclean" false when encountering them. suggested by Stephan Uphoff in PR/24596 (1). - genfs_putpages: write protect pages when cleaning out, if we're going to take the vnode off the syncer's queue. uvm_fault: don't write-map pages unless its vnode is already on the syncer's queue. fix PR/24596 (3) but in the different way from the suggested fix. (to keep our current behaviour, ie. not to require explicit msync. discussed on tech-kern@.) - genfs_putpages: don't mistakenly take a vnode off the queue by introducing a generation number in genfs_node. genfs_getpages: increment the generation number. suggested by Stephan Uphoff in PR/24596 (2). - add some assertions.
1.100	17-Jul-2005	yamt	- introduce PGO_NOBLOCKALLOC and use it for ubc mapping to prevent unnecessary block allocations in the case that page size > block size. - ufs_balloc_range: use VM_PROT_WRITE+PGO_NOBLOCKALLOC rather than VM_PROT_READ.
1.99	16-Jul-2005	yamt	genfs_getpages: don't forget to put the vnode onto the syncer's work queue even in the case of PGO_LOCKED.
1.98	28-Jun-2005	yamt	branches: 1.98.2; - constify genfs_ops. - use member designators.
1.97	29-May-2005	christos	- sprinkle const - avoid shadowed variables.
1.96	26-Feb-2005	perry	branches: 1.96.2; nuke trailing whitespace
1.95	16-Feb-2005	chs	undo the part of rev. 1.93 that turned the past-EOF check into an assertion. read() can't request pages past EOF, but mmap() can. apparently I had disengaged the brain when I said that was ok.
1.94	25-Jan-2005	wrstuden	Extend fsync_range(2) to support the FDISKSYNC flag, which requests that the sync be propogated out through the disk drive caches.
1.93	25-Jan-2005	drochner	branches: 1.93.2; -in the read-ahead code, avoid to issue read requests at/past EOF -because noone should request reads past EOF, or writes past EOF which are not explicitely marked as file-extending (PGO_PASTEOF), turn a boundary check into a KASSERT approved by Chuck Silvers
1.92	22-Dec-2004	dbj	branches: 1.92.2; check for _KERNEL_OPT around opt include
1.91	04-Oct-2004	enami	Backout previous; seeing many busy page on the pageq is normal.
1.90	03-Oct-2004	enami	So that not to leave pages busy unnecessarily, bound to specified region when building cluster if we aren't pagedaemon and clean entire cluster if we are pagedaemon.
1.89	03-Oct-2004	enami	Count obj pages freed by pagedaemon.
1.88	17-Sep-2004	skrll	There's no need to pass a proc value when using UIO_SYSSPACE with vn_rdwr(9) and uiomove(9). OK'd by Jason Thorpe
1.87	27-May-2004	yamt	- remove a comment which is no longer true. - add "XXX vn_lock" comments where we can call VOP_READ/WRITE without vnode lock held. (genfs_compat_*)
1.86	25-May-2004	hannken	Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD. - Not enabled by default. Needs kernel option FFS_SNAPSHOT. - Change parameters of ffs_blkfree. - Let the copy-on-write functions return an error so spec_strategy may fail if the copy-on-write fails. - Change genfs_lock() to use vp->v_vnlock instead of &vp->v_lock. - Add flag B_METAONLY to VOP_BALLOC to return indirect block buffer. - Add a function ffs_checkfreefile needed for snapshot creation. - Add special handling of snapshot files: Snapshots may not be opened for writing and the attributes are read-only. Use the mtime as the time this snapshot was taken. Deny mtime updates for snapshot files. - Add function transferlockers to transfer any waiting processes from one lock to another. - Add vfsop VFS_SNAPSHOT to take a snapshot and make it accessible through a vnode. - Add snapshot support to ls, fsck_ffs and dump. Welcome to 2.0F. Approved by: Jason R. Thorpe <thorpej@netbsd.org>
1.85	25-Jan-2004	hannken	Make VOP_STRATEGY(bp) a real VOP as discussed on tech-kern. VOP_STRATEGY(bp) is replaced by one of two new functions: - VOP_STRATEGY(vp, bp) Call the strategy routine of vp for bp. - DEV_STRATEGY(bp) Call the d_strategy routine of bp->b_dev for bp. DEV_STRATEGY(bp) is used only for block-to-block device situations.
1.84	10-Jan-2004	yamt	store a i/o priority hint in struct buf for buffer queue discipline.
1.83	27-Nov-2003	pk	genfs_revoke: use ltsleep() to release the vnode spin lock to avoid a sleep/wakeup race.
1.82	24-Sep-2003	yamt	fix a bug of lfs. genfs_getpages() can read in more blocks than it should due to faked filesize of lfs_gop_size(). it's a security problem and it makes gcc3 "internal error" to fix this, - in genfs_getpages(), always calculate diskeof and memeof separately so that filesystems (in this case, lfs) can use different strategies for them. - introduce GOP_SIZE_MEM flag and use it to request in-core filesize. (it was an intention of GOP_SIZE_READ, but after the above change _READ is not a straightforward name) after this, no one uses GOP_SIZE_{READ,WRITE} anymore but leave them for now.
1.81	07-Aug-2003	agc	Move UCB-licensed code from 4-clause to 3-clause licence. Patches provided by Joel Baker in PR 22364, verified by myself.
1.80	29-Jun-2003	fvdl	branches: 1.80.2; Back out the lwp/ktrace changes. They contained a lot of colateral damage, and need to be examined and discussed more.
1.79	28-Jun-2003	darrenr	Pass lwp pointers throughtout the kernel, as required, so that the lwpid can be inserted into ktrace records. The general change has been to replace "struct proc " with "struct lwp " in various function prototypes, pass the lwp through and use l_proc to get the process pointer when needed. Bump the kernel rev up to 1.6V
1.78	17-Jun-2003	simonb	Micro-optimisation- move the "pgs == NULL" check from the previous change to immediately after the malloc call. This can't fail in the non-malloc case. Reviewd by YAMAMOTO Takashi.
1.77	15-Jun-2003	yamt	genfs_getpages: if number of pages requested is >16, use malloc/free for array of pointers to vm_page. otherwise, use on-stack array as used to. this change fixes assertion failure when nfsd gets a big read request that isn't aligned with filesystem block. discussed on tech-kern.
1.76	23-Apr-2003	tls	Correct use of MAXBSIZE where MAXPHYS was intended. This is a necessary first step towards per-device MAXPHYS, and has the beneficial side effect of allowing clustering to MAXPHYS even on systems that need to run with a reduced MAXBSIZE to get more metadata buffers.
1.75	10-Apr-2003	jdolecek	use former genfs_eopnotsupp_rele() as genfs_eopnotsupp(), so that vnodes are vput()/vrele()d as necessary - some filesystems did use the wrong one for some ops, and it's just safer to not take the chance based on suggestion by Bill Studenmund
1.74	10-Apr-2003	jdolecek	improve genfs_eopnotsupp_rele() so that's usable for vop_rename, which uses WILLPUT for member which may be NULL handle correctly dvp == vp case for WILLPUT members, so this works for vop_remove, vop_rename thanks Bill Studenmund for code&comments on this
1.73	25-Feb-2003	thorpej	Add a new BUF_INIT() macro which initializes b_dep and b_interlock, and use it. This fixes a few places where either b_dep or b_interlock were not properly initialized.
1.72	17-Feb-2003	perseant	Add code to UBCify LFS. This is still behind "#ifdef LFS_UBC" for now (there are still some details to work out) but expect that to go away soon. To support these basic changes (creation of lfs_putpages, lfs_gop_write, mods to lfs_balloc) several other changes were made, to wit: * Create a writer daemon kernel thread whose purpose is to handle page writes for the pagedaemon, but which also takes over some of the functions of lfs_check(). This thread is started the first time an LFS is mounted. * Add a "flags" parameter to GOP_SIZE. Current values are GOP_SIZE_READ, meaning that the call should return the size of the in-core version of the file, and GOP_SIZE_WRITE, meaning that it should return the on-disk size. One of GOP_SIZE_READ or GOP_SIZE_WRITE must be specified. * Instead of using malloc(...M_WAITOK) for everything, reserve enough resources to get by and use malloc(...M_NOWAIT), using the reserves if necessary. Use the pool subsystem for structures small enough that this is feasible. This also obsoletes LFS_THROTTLE. And a few that are not strictly necessary: * Moves the LFS inode extensions off onto a separately allocated structure; getting closer to LFS as an LKM. "Welcome to 1.6O." * Unified GOP_ALLOC between FFS and LFS. * Update LFS copyright headers to correct values. * Actually cast to unsigned in lfs_shellsort, like the comment says. * Keep track of which segments were empty before the previous checkpoint; any segments that pass two checkpoints both dirty and empty can be summarily cleaned. Do this. Right now lfs_segclean still works, but this should be turned into an effectless compatibility syscall.
1.71	05-Feb-2003	pk	Make the buffer cache code MP-safe.
1.70	21-Jan-2003	christos	step 3. Assign lwp properly if null, so that we can PHOLD without segfaulting.
1.69	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.68	15-Nov-2002	yamt	genfs_compat_gop_write: set uio_iovcnt correctly.
1.67	25-Oct-2002	yamt	use B_ASYNC for children of nested buffers in genfs_getpages. ok'ed by Chuck Silvers.
1.66	23-Oct-2002	jdolecek	merge kqueue branch into -current kqueue provides a stateful and efficient event notification framework currently supported events include socket, file, directory, fifo, pipe, tty and device changes, and monitoring of processes and signals kqueue is supported by all writable filesystems in NetBSD tree (with exception of Coda) and all device drivers supporting poll(2) based on work done by Jonathan Lemon for FreeBSD initial NetBSD port done by Luke Mewburn and Jason Thorpe
1.65	21-Oct-2002	fvdl	Use B_ASYNC in the !PGO_SYNCIO case. Gets back most, if not all, NFS read throughput performance lost since the introduction of UBC. Spotted by YAMAMOTO Takashi, many thanks to him.
1.64	29-May-2002	enami	Add missing pageq lock while uvm_pagefree() is called (either directly or indirectly). Reviewed by chuq.
1.63	18-May-2002	enami	branches: 1.63.2; Just give up to do readahead rather than waiting busy pages. While I'm here, added few patchable variable so that one can easily measure readahead behaviour.
1.62	14-May-2002	perseant	branches: 1.62.2; Protect v_synclist with splbio(); note that LIST_REMOVE is not an idempotent operation if more than one LIST_REMOVE happens on interrupt, so both the test for VONWORKLIST and the LIST_REMOVE(vp, v_synclist) need to be in splbio().
1.61	10-May-2002	enami	Redo rev. 1.57 a bit different way; don't use `tpg' since it may be freed. Subtract the number of pages behind us when calculating new offset instead.
1.60	10-May-2002	enami	Don't modify the local variable `n' in genfs_putpages(). It should contain the number of elements in the page array at the beginning of every iteration.
1.59	09-May-2002	enami	When traversing by list, if the page next to us is a page in the cluster, advance the pointer.
1.58	09-May-2002	enami	- In genfs_putpages(), no need to restrict the cluster within the given region. - In uvm_aio_aiodone(), remove assertions no longer true.
1.57	06-May-2002	enami	Since npages may includes number of pages behind us, we can't use it to update current offset. Instead, use the last page in the run of pages to calculate new offset.
1.56	06-May-2002	enami	Stylistic change; introduce new local variable and use it instead of sprinkling different expression to test if we're pagedaemon.
1.55	26-Apr-2002	enami	We don't need to re-activate page in genfs_putpages() when GOP_WRITE returns ENOMEM (temporary memory shortage) since it is already handled in uvm_aio_aiodone() for both async/sync case. Discussed with chuq.
1.54	16-Apr-2002	enami	genfs_{compat_}getpages(): For PGO_LOCKED request, it is safe to return read only page if it was due to read fault. This avoid many unnecessary read fault introduced by recent nfs_bio.c change. Reviewed by chuq.
1.53	16-Apr-2002	enami	KNF and other misc. cosmetic changes.
1.52	22-Mar-2002	chs	in genfs_compat_getpages(), clear any part of a page that VOP_READ() doesn't fill in (eg. because it's past EOF).
1.51	17-Mar-2002	atatat	Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for indicating an unhandled "command". ERESTART is -1, which can lead to confusion. ERESTART has been moved to -3 and EPASSTHROUGH has been placed at -4. No ioctl code should now return -1 anywhere. The ioctl() system call is now properly restartable.
1.50	02-Mar-2002	chs	don't yield the cpu in genfs_putpages() if we're the pagedaemon. pointed out by enami. fixes PR 15784.
1.49	19-Feb-2002	chs	fix two problems: - when yielding the cpu while using the vnode's page list, use a marker page to keep our place in the list (like the other cases where we drop the lock). - wait until no one else has the page busy before deciding if the page needs to be cleaned. a page will be dirty while it's being initialized but will be marked clean before PG_BUSY is cleared. both found by enami.
1.48	13-Feb-2002	enami	Don't bother to subtract 0.
1.47	12-Feb-2002	enami	Don't leave junk in pgs[] array since it will be passed to uvn_findpages() again.
1.46	26-Jan-2002	chs	in genfs_putpages(): - yield the cpu if we've taken too long. - when traversing by offset, skip over any pages that we clustered.
1.45	31-Dec-2001	chs	in genfs_gop_write(), actually set the B_ASYNC flag on buffers that we're not going to wait for. this doesn't matter for real devices since we call VOP_STRATEGY() directly, but NFS uses this flag to decide whether or not to hand the buffer off to an nfsiod thread.
1.44	31-Dec-2001	chs	in genfs_putpages(), we must wait for any pending write i/os to complete if the putpages request is synchronous.
1.43	18-Dec-2001	chs	add some compatibility routines to allow mmap() to work non-UBCified filesystems (in the same non-coherent fashion that they worked before).
1.42	06-Dec-2001	chs	add a VOP_PUTPAGES method for all the filesystems that don't have pages, just unlock the interlock.
1.41	30-Nov-2001	christos	PR/14781: Matthew Fredette: Clamp the number of read-ahead pages to 16 because other code has this limit. Also while I am here, convert the magic 16 into a #define constant and use it in the appropriate places. This is a temporary fix, since all this read-ahead business is XXXUBC anyway.
1.40	10-Nov-2001	lukem	add RCSIDs
1.39	03-Oct-2001	enami	branches: 1.39.2; s/genfs_do_putpages/genfs_gop_write/ in uvmhist.
1.38	21-Sep-2001	chs	when zeroing pages past EOF, don't zero the page containing EOF if it already contains valid data. should fix PRs 13361 and 13436.
1.37	15-Sep-2001	chs	a whole bunch of changes to improve performance and robustness under load: - remove special treatment of pager_map mappings in pmaps. this is required now, since I've removed the globals that expose the address range. pager_map now uses pmap_kenter_pa() instead of pmap_enter(), so there's no longer any need to special-case it. - eliminate struct uvm_vnode by moving its fields into struct vnode. - rewrite the pageout path. the pager is now responsible for handling the high-level requests instead of only getting control after a bunch of work has already been done on its behalf. this will allow us to UBCify LFS, which needs tighter control over its pages than other filesystems do. writing a page to disk no longer requires making it read-only, which allows us to write wired pages without causing all kinds of havoc. - use a new PG_PAGEOUT flag to indicate that a page should be freed on behalf of the pagedaemon when it's unlocked. this flag is very similar to PG_RELEASED, but unlike PG_RELEASED, PG_PAGEOUT can be cleared if the pageout fails due to eg. an indirect-block buffer being locked. this allows us to remove the "version" field from struct vm_page, and together with shrinking "loan_count" from 32 bits to 16, struct vm_page is now 4 bytes smaller. - no longer use PG_RELEASED for swap-backed pages. if the page is busy because it's being paged out, we can't release the swap slot to be reallocated until that write is complete, but unlike with vnodes we don't keep a count of in-progress writes so there's no good way to know when the write is done. instead, when we need to free a busy swap-backed page, just sleep until we can get it busy ourselves. - implement a fast-path for extending writes which allows us to avoid zeroing new pages. this substantially reduces cpu usage. - encapsulate the data used by the genfs code in a struct genfs_node, which must be the first element of the filesystem-specific vnode data for filesystems which use genfs_{get,put}pages(). - eliminate many of the UVM pagerops, since they aren't needed anymore now that the pager "put" operation is a higher-level operation. - enhance the genfs code to allow NFS to use the genfs_{get,put}pages instead of a modified copy. - clean up struct vnode by removing all the fields that used to be used by the vfs_cluster.c code (which we don't use anymore with UBC). - remove kmem_object and mb_object since they were useless. instead of allocating pages to these objects, we now just allocate pages with no object. such pages are mapped in the kernel until they are freed, so we can use the mapping to find the page to free it. this allows us to remove splvm() protection in several places. The sum of all these changes improves write throughput on my decstation 5000/200 to within 1% of the rate of NetBSD 1.5 and reduces the elapsed time for "make release" of a NetBSD 1.5 source tree on my 128MB pc to 10% less than a 1.5 kernel took.
1.36	17-Aug-2001	chs	branches: 1.36.2; make genfs get/put work for block devices as well: - the "fs bshift" for block devices is always DEV_BSHIFT. - retrieve the device vnode from VOP_BMAP() and use that to set b_dev in page i/o buffers.
1.35	14-Jun-2001	chs	branches: 1.35.2; be sure to allocate dirty zeroed pages to cover blocks we allocate to resolve a write fault. fixes PR 13201. also, be sure to allocate blocks for write faults to holes even if the page is already in memory. fixes PR 13189.
1.34	28-May-2001	chs	add a genfs_mmap() and change all of the disk-based filesystems to implement VOP_MMAP() with the genfs version, in preparation for actually using this VOP.
1.33	26-May-2001	chs	replace vm_page_t with struct vm_page *.
1.32	10-Mar-2001	chs	eliminate the VM_PAGER_* error codes in favor of the traditional E* codes. the mapping is: VM_PAGER_OK 0 VM_PAGER_BAD <unused> VM_PAGER_FAIL <unused> VM_PAGER_PEND 0 (see below) VM_PAGER_ERROR EIO VM_PAGER_AGAIN EAGAIN VM_PAGER_UNLOCK EBUSY VM_PAGER_REFAULT ERESTART for async i/o requests, it used to be possible for the request to be convert to sync, and the pager would return VM_PAGER_OK or VM_PAGER_PEND to indicate whether the caller should perform post-i/o cleanup. this is no longer allowed; pagers must now return 0 to indicate that the async i/o was successfully started, and the caller never needs to worry about doing the post-i/o cleanup.
1.31	28-Feb-2001	chs	branches: 1.31.2; in genfs_getpages(), don't try to optimize zeroing past EOF. fixes PR 12297.
1.30	27-Feb-2001	chs	distinguish between a file's in-memory EOF (which marks the offset at which we disallow creation of page cache pages) and its on-disk EOF (which marks the offset at which there is not (yet) data on disk that we need to read when creating pages). for requests with PGO_PASTEOF, the in-memory EOF maybe be much larger than the on-disk EOF.
1.29	18-Feb-2001	chs	fix a couple more bugs: - in genfs_getpages(), unbusy any pages that we don't free in the error path. - in genfs_putpages(), if we get a bmap error, record that in the master buf.
1.28	12-Feb-2001	fvdl	Oops, removal unintenionally commited debug code.
1.27	12-Feb-2001	fvdl	Format arg nit.
1.26	05-Feb-2001	chs	fix several bugs: - in the cases where we skip over the i/o loop, increment npages by ridx so that when the cleanup code starts processing the pgs array at index 0 it'll actually process all of the pages. - process the PG_RELEASED flag when unbusying pages. - add some missing MP locking. - use MIN() and MAX() instead of min() and max() since the latter are functions which take arguments of type "int" but we call them with values of type "off_t", so the values could be truncated. - in the PGO_PASTEOF case, use the larger of the current file size and the end of the requested range of pages as the file size for this request. this fixes some problems with sparsing writes to large offsets.
1.25	22-Jan-2001	fvdl	Cast lbn to off_t in a few places, to avoid daddr_t overflow and all sorts of havoc. From Bill Sommerfeld.
1.24	27-Dec-2000	chs	several bugs: - in genfs_getpages() don't start read-ahead if we get an error on the sync read, and always start read-ahead after the range of the sync read if we do any at all. - off-by-one error in genfs_size().
1.23	09-Dec-2000	chs	only zero the part of the page after EOF if we're actually initializing the page.
1.22	27-Nov-2000	chs	allow building without SOFTDEP by adding the pageiodone hook to bio_ops.
1.21	27-Nov-2000	chs	Initial integration of the Unified Buffer Cache project.
1.20	19-Sep-2000	fvdl	Adapt for VOP_FSYNC parameter change.
1.19	03-Aug-2000	thorpej	Convert namei pathname buffer allocation to use the pool allocator.
1.18	29-May-2000	mycroft	branches: 1.18.2; Stylistic change.
1.17	13-May-2000	perseant	branches: 1.17.2; Change the sementics of the last parameter from a boolean ("waitfor") to a set of flags ("flags"). Two flags are defined, UPDATE_WAIT and UPDATE_DIROP. Under the old semantics, VOP_UPDATE would block if waitfor were set, under the assumption that directory operations should be done synchronously. At least LFS and FFS+softdep do not make this assumption; FFS+softdep got around the problem by enclosing all relevant calls to VOP_UPDATE in a "if(!DOINGSOFTDEP(vp))", while LFS simply ignored waitfor, one of the reasons why NFS-serving an LFS filesystem did not work properly. Under the new semantics, the UPDATE_DIROP flag is a hint to the fs-specific update routine that the call comes from a dirop routine, and should be wait for, or not, accordingly. Closes PR#8996.
1.16	30-Mar-2000	augustss	Register, begone!
1.15	15-Nov-1999	fvdl	Add Kirk McKusick's soft updates code to the trunk. Not enabled by default, as the copyright on the main file (ffs_softdep.c) is such that is has been put into gnusrc. options SOFTDEP will pull this in. This code also contains the trickle syncer. Bump version number to 1.4O
1.14	23-Oct-1999	fvdl	Remove some mentioned members in the vop {un}lock args struct that we do not actually have.
1.13	03-Aug-1999	wrstuden	branches: 1.13.2; 1.13.4; 1.13.6; Add support for fcntl(2) to generate VOP_FCNTL calls. Any fcntl call with F_FSCTL set and F_SETFL calls generate calls to a new fileop fo_fcntl. Add genfs_fcntl() and soo_fcntl() which return 0 for F_SETFL and EOPNOTSUPP otherwise. Have all leaf filesystems use genfs_fcntl(). Reviewed by: thorpej Tested by: wrstuden
1.12	08-Jul-1999	wrstuden	Introduce layer library in genfs. This set of files abstracts most of the functionality of nullfs. The latter is now just a mount & unmount routine, and a few tables. umapfs borrow most of this infrastructure. Both fs's are now nfs-exportable. All layered fs's share a common format to private mount & private vnode structs (which a particular fs can extend). Also add genfs_noerr_rele(), a vnode op which will vrele/vput operand vnodes appropriately.
1.11	05-Mar-1999	mycroft	branches: 1.11.4; Pass null pointers to VOP_UPDATE rather than having all the callers fetch the current time themselves.
1.10	13-Aug-1998	kleink	Add genfs_einval(), which does the obvious thing.
1.9	10-Aug-1998	matthias	create miscfs/genfs/genfs_vnops.c:genfs_enoioctl and make all the other filesystems use it instead of a private version.
1.8	25-Jun-1998	thorpej	- Rename nqnfs_vop_lease_check() to genfs_lease_check(). If NFSSERVER is not in the kernel, genfs_lease_check() is simply a no-op. This allows LKM'd file systems to be exported (previously did not work properly due to a compile-time decision based on -DNFSSERVER). - defopt NFSSERVER
1.7	05-Jun-1998	kleink	* Convert fsync vnode operator implementations and usage from the old waitfor argument and MNT_WAIT/MNT_NOWAIT to flags and FSYNC_WAIT. * In genfs_fsync(), honor the FSYNC_NODATA flag.
1.6	01-Mar-1998	fvdl	Merge with Lite2 + local changes
1.5	05-Jan-1998	perry	RCSID Police.
1.4	11-Apr-1997	kleink	Implement a POSIX compliant genfs VOP_SEEK() and use it in the appropriate places; by Chris G. Demetriou and myself.
1.3	07-Sep-1996	mycroft	Implement poll(2).
1.2	05-Sep-1996	thorpej	Remove some unused variables.
1.1	01-Sep-1996	mycroft	Add a set of generic file system operations that most file systems use. Also, fix some time stamp bogosities.
1.11.4.7	31-Aug-1999	perseant	Rudimentary support for LFS under UBC: - LFS-specific VOP_BALLOC and VOP_PUTPAGES vnode ops. - getblk VREG panic #ifdef'd out (can be reinstated when Ifile is internalized and Ifile can be made another type from VREG) - interface to VOP_PUTPAGES changed to pass all pager flags, not just sync. FS putpages routines must know about the pager flags. - new LFS magic disk address, -2 ("unwritten"), meaning accounted for but not assigned to a fixed disk location (since LFS does these two things separately, and the previous accounting method using buffer headers no longer will work). Changed references to (foo == (daddr_t)-1) to (foo < 0). Since disk drivers reject all addresses < 0, this should not present a problem for other FSs.
1.11.4.6	09-Aug-1999	chs	create a new type "voff_t" for uvm_object offsets and define it to be "off_t". also, remove pgo_asyncget().
1.11.4.5	02-Aug-1999	thorpej	Update from trunk.
1.11.4.4	31-Jul-1999	chs	genfs_getpages() now handles: - faults on offsets past the nominal EOF during extending writes. - returning multiple pages in the !PGO_LOCKED case if multiple pages are requested. - using new VOP_BALLOC() interface to for allocating getpages with blocksize<pagesize. genfs_putpages() now handles: - writing pages which do not have full backing store allocated.
1.11.4.3	12-Jul-1999	chs	fix the PGO_OVERWRITE case, I don't know how it was working before. tidy a few other bits.
1.11.4.2	11-Jul-1999	chs	yet another major rework of the generic getpages. we now do the block allocations for allocating getpages operations after reading the pages. for nested i/os, use b_resid rather than b_bcount to track the amount left to go. return values for getpages/putpages are now unix errnos rather than VM_PAGER_*. readahead is gone again for the moment.
1.11.4.1	04-Jul-1999	chs	create genfs_getpages() and genfs_putpages(). these should be able to handle most of the local-disk filesystems.
1.13.6.1	27-Dec-1999	wrstuden	Pull up to last week's -current.
1.13.4.2	15-Nov-1999	fvdl	Sync with -current
1.13.4.1	19-Oct-1999	fvdl	Bring in Kirk McKusick's FFS softdep code on a branch.
1.13.2.6	12-Mar-2001	bouyer	Sync with HEAD.
1.13.2.5	11-Feb-2001	bouyer	Sync with HEAD.
1.13.2.4	05-Jan-2001	bouyer	Sync with HEAD
1.13.2.3	13-Dec-2000	bouyer	Sync with HEAD (for UBC fixes).
1.13.2.2	08-Dec-2000	bouyer	Sync with HEAD.
1.13.2.1	20-Nov-2000	bouyer	Update thorpej_scsipi to -current as of a month ago
1.17.2.1	22-Jun-2000	minoura	Sync w/ netbsd-1-5-base.
1.18.2.1	14-Dec-2000	he	Pull up revision 1.20 (requested by fvdl): Improve NFS performance, possibly with as much as 100% in throughput. Please note: this implies a kernel interface change, VOP_FSYNC gains two arguments.
1.31.2.22	07-Jan-2003	thorpej	In the SA universe, the switch-to-this-LWP decision is made at a different level than where preempt() calls are made, which renders the "newlwp" argument useless. Replace it with a "more work to do" boolean argument. Returning to userspace preempt() calls pass 0. "Voluntary" preemptions in e.g. uiomove() pass 1. This will be used to indicate to the SA subsystem that the LWP is not yet finished in the kernel. Collapse the SA vs. non-SA cases of preempt() together, making the conditional code block much smaller, and don't call sa_preempt() if more work is to come. NOTE: THIS IS NOT A COMPLETE FIX TO THE preempt()-in-uiomove() PROBLEM THAT CURRENTLY EXISTS FOR SA PROCESSES.
1.31.2.21	11-Dec-2002	thorpej	Sync with HEAD.
1.31.2.20	11-Nov-2002	nathanw	Catch up to -current
1.31.2.19	23-Oct-2002	thorpej	Fix a merge botch.
1.31.2.18	23-Oct-2002	thorpej	Sync with rev. 1.65.
1.31.2.17	16-Jul-2002	nathanw	pagedaemon_proc really should be a proc, not a LWP.
1.31.2.16	12-Jul-2002	nathanw	No longer need to pull in lwp.h; proc.h pulls it in for us.
1.31.2.15	24-Jun-2002	nathanw	Curproc->curlwp renaming. Change uses of "curproc->l_proc" back to "curproc", which is more like the original use. Bare uses of "curproc" are now "curlwp". "curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL) so that it is always safe to reference curproc (dereferencing curproc is another story, but that's always been true).
1.31.2.14	20-Jun-2002	nathanw	Catch up to -current.
1.31.2.13	17-Apr-2002	nathanw	Catch up to -current.
1.31.2.12	01-Apr-2002	nathanw	Catch up to -current. (CVS: It's not just a program. It's an adventure!)
1.31.2.11	28-Feb-2002	nathanw	LWPify.
1.31.2.10	28-Feb-2002	nathanw	Catch up to -current.
1.31.2.9	09-Jan-2002	nathanw	curproc ==> curproc->l_proc
1.31.2.8	08-Jan-2002	nathanw	Catch up to -current.
1.31.2.7	14-Nov-2001	nathanw	Catch up to -current.
1.31.2.6	08-Oct-2001	nathanw	Catch up to -current.
1.31.2.5	21-Sep-2001	nathanw	Catch up to -current.
1.31.2.4	24-Aug-2001	nathanw	Catch up with -current.
1.31.2.3	21-Jun-2001	nathanw	Catch up to -current.
1.31.2.2	09-Apr-2001	nathanw	Catch up with -current.
1.31.2.1	05-Mar-2001	nathanw	Initial commit of scheduler activations and lightweight process support.
1.35.2.8	02-Oct-2002	jdolecek	knote data is now 64bit, g/c obsolete comment
1.35.2.7	29-Sep-2002	jdolecek	don't need cast to (caddr_t) for kn_hook anymore
1.35.2.6	25-Sep-2002	jdolecek	implement genfs_kqfilter() - this is based upon ufs_kqfilter(), but uses vp->v_size for EVFILT_READ
1.35.2.5	23-Jun-2002	jdolecek	catch up with -current on kqueue branch
1.35.2.4	16-Mar-2002	jdolecek	Catch up with -current.
1.35.2.3	11-Feb-2002	jdolecek	Sync w/ -current.
1.35.2.2	10-Jan-2002	thorpej	Sync kqueue branch with -current.
1.35.2.1	25-Aug-2001	thorpej	Merge Aug 24 -current into the kqueue branch.
1.36.2.5	11-Oct-2001	fvdl	Catch up with -current. Fix some bogons in the sparc64 kbd/ms attach code. cd18xx conversion provided by mrg.
1.36.2.4	01-Oct-2001	fvdl	Catch up with -current.
1.36.2.3	27-Sep-2001	fvdl	Put back line that got misplaced somehow.
1.36.2.2	26-Sep-2001	fvdl	* add a VCLONED vnode flag that indicates a vnode representing a cloned device. * rename REVOKEALL to REVOKEALIAS, and add a REVOKECLONE flag, to pass to VOP_REVOKE * the revoke system call will revoke all aliases, as before, but not the clones * vdevgone is called when detaching a device, so make it use REVOKECLONE to get rid of all clones as well * clean up all uses of VOP_OPEN wrt. locking. * add a few VOPS to spec_vnops that need to do something when it's a clone vnode (access and getattr) * add a copy of the vnode vattr structure of the original 'master' vnode to the specinfo of a cloned vnode. could possibly redirect getattr to the 'master' vnode, but this has issues with revoke * add a vdev_reassignvp function that disassociates a vnode from its original device, and reassociates it with the specified dev_t. to be used by cloning devices only, in case a new minor is allocated. * change all direct references in drivers to v_devcookie and v_rdev to vdev_privdata(vp) and vdev_rdev(vp). for diagnostic purposes when debugging race conditions that still exist wrt. locking and revoking vnodes. * make the locking state of a vnode consistent when passed to d_open and d_close (unlocked). locked would be better, but has some deadlock issues
1.36.2.1	07-Sep-2001	thorpej	Commit my "devvp" changes to the thorpej-devvp branch. This replaces the use of dev_t in most places with a struct vnode *. This will form the basic infrastructure for real cloning device support (besides being architecurally cleaner -- it'll be good to get away from using numbers to represent objects).
1.39.2.1	12-Nov-2001	thorpej	Sync the thorpej-mips-cache branch with -current.
1.62.2.1	30-May-2002	gehenna	Catch up with -current.
1.63.2.3	26-Aug-2003	tron	Pull up revision 1.76 (requested by tls in ticket #1434): Correct use of MAXBSIZE where MAXPHYS was intended. This is a necessary first step towards per-device MAXPHYS, and has the beneficial side effect of allowing clustering to MAXPHYS even on systems that need to run with a reduced MAXBSIZE to get more metadata buffers.
1.63.2.2	23-Oct-2002	lukem	Pull up revision 1.65 (requested by fvdl in ticket #935): Use B_ASYNC in the !PGO_SYNCIO case. Gets back most, if not all, NFS read throughput performance lost since the introduction of UBC. Spotted by YAMAMOTO Takashi, many thanks to him.
1.63.2.1	01-Jun-2002	tv	Pull up revision 1.64 (requested by enami in ticket #114): Add missing pageq lock while uvm_pagefree() is called (either directly or indirectly). Reviewed by chuq.
1.80.2.11	11-Dec-2005	christos	Sync with head.
1.80.2.10	10-Nov-2005	skrll	Sync with HEAD. Here we go again...
1.80.2.9	04-Mar-2005	skrll	Sync with HEAD. Hi Perry!
1.80.2.8	17-Feb-2005	skrll	Sync with HEAD.
1.80.2.7	04-Feb-2005	skrll	Sync with HEAD.
1.80.2.6	17-Jan-2005	skrll	Sync with HEAD.
1.80.2.5	19-Oct-2004	skrll	Sync with HEAD
1.80.2.4	21-Sep-2004	skrll	Fix the sync with head I botched.
1.80.2.3	18-Sep-2004	skrll	Sync with HEAD.
1.80.2.2	03-Aug-2004	skrll	Sync with HEAD
1.80.2.1	02-Jul-2003	darrenr	Apply the aborted ktrace-lwp changes to a specific branch. This is just for others to review, I'm concerned that patch fuziness may have resulted in some errant code being generated but I'll look at that later by comparing the diff from the base to the branch with the file I attempt to apply to it. This will, at the very least, put the changes in a better context for others to review them and attempt to tinker with removing passing of 'struct lwp' through the kernel.
1.92.2.1	29-Apr-2005	kent	sync with -current
1.93.2.3	19-Mar-2005	yamt	sync with head. xen and whitespace. xen part is not finished.
1.93.2.2	12-Feb-2005	yamt	sync with head.
1.93.2.1	25-Jan-2005	yamt	file genfs_vnops.c was added on branch yamt-km on 2005-02-12 18:17:53 +0000
1.96.2.1	24-Aug-2005	riz	Pull up following revision(s) (requested by yamt in ticket #688): sys/miscfs/genfs/genfs_vnops.c: revision 1.98 via patch sys/ufs/ffs/ffs_vfsops.c: revision 1.165 sys/ufs/lfs/lfs_extern.h: revision 1.69 sys/fs/filecorefs/filecore_vfsops.c: revision 1.20 sys/nfs/nfs_node.c: revision 1.80 sys/fs/smbfs/smbfs_node.c: revision 1.24 sys/fs/cd9660/cd9660_vfsops.c: revision 1.24 sys/fs/msdosfs/msdosfs_denode.c: revision 1.8 sys/miscfs/genfs/genfs_node.h: revision 1.6 sys/ufs/lfs/lfs_vfsops.c: revision 1.183 sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.86 sys/fs/adosfs/advfsops.c: revision 1.23 sys/fs/ntfs/ntfs_vfsops.c: revision 1.31 - constify genfs_ops. - use member designators. sys/miscfs/genfs/genfs_vnops.c: revision 1.99 via patch genfs_getpages: don't forget to put the vnode onto the syncer's work que ue even in the case of PGO_LOCKED. sys/uvm/uvm_bio.c: revision 1.40 sys/uvm/uvm_pager.h: revision 1.29 sys/miscfs/genfs/genfs_vnops.c: revision 1.100 via patch sys/ufs/ufs/ufs_inode.c: revision 1.50 - introduce PGO_NOBLOCKALLOC and use it for ubc mapping to prevent unnecessary block allocations in the case that page size > block size. - ufs_balloc_range: use VM_PROT_WRITE+PGO_NOBLOCKALLOC rather than VM_PROT_READ. sys/uvm/uvm_fault.c: revision 1.96 sys/miscfs/genfs/genfs_vnops.c: revision 1.101 via patch sys/uvm/uvm_object.h: revision 1.19 sys/miscfs/genfs/genfs_node.h: revision 1.7 ensure that vnodes with dirty pages are always on syncer's queue. - genfs_putpages: wait for i/o completion of PG_RELEASED/PG_PAGEOUT pages by setting "wasclean" false when encountering them. suggested by Stephan Uphoff in PR/24596 (1). - genfs_putpages: write protect pages when cleaning out, if we're going to take the vnode off the syncer's queue. uvm_fault: don't write-map pages unless its vnode is already on the syncer's queue. fix PR/24596 (3) but in the different way from the suggested fix. (to keep our current behaviour, ie. not to require explicit msync. discussed on tech-kern@.) - genfs_putpages: don't mistakenly take a vnode off the queue by introducing a generation number in genfs_node. genfs_getpages: increment the generation number. suggested by Stephan Uphoff in PR/24596 (2). - add some assertions. sys/miscfs/genfs/genfs_vnops.c: revision 1.102 via patch genfs_putpages: don't bother to clean the vnode unless VONWORKLST. sys/ufs/ffs/ffs_vnops.c: revision 1.71 ffs_full_fsync: because VBLK/VCHR can be mmap'ed, do VOP_PUTPAGES for them as well. sys/uvm/uvm_fault.c: revision 1.97 uvm_fault: check a correct object in the case of layered filesystems. fix PR/30811 from Jukka Salmi. sys/uvm/uvm_object.h: revision 1.20 sys/ufs/ffs/ffs_vfsops.c: revision 1.167 sys/uvm/uvm_bio.c: revision 1.41 sys/ufs/ufs/ufs_vnops.c: revision 1.129 sys/uvm/uvm_mmap.c: revision 1.92 sys/uvm/uvm_fault.c: revision 1.98 sys/kern/vfs_subr.c: revision 1.252 sys/fs/msdosfs/denode.h: revision 1.5 sys/miscfs/genfs/genfs_vnops.c: revision 1.103 via patch sys/fs/msdosfs/msdosfs_denode.c: revision 1.9 sys/sys/vnode.h: revision 1.141 sys/ufs/ufs/ufs_inode.c: revision 1.51 sys/ufs/ufs/ufs_extern.h: revision 1.45 via patch sys/miscfs/genfs/genfs_node.h: revision 1.8 sys/ufs/lfs/lfs_vfsops.c: revision 1.184 sys/uvm/uvm_pager.h: revision 1.30 sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.87 update file timestamps for nfsd loaned-read and mmap. PR/25279. discussed on tech-kern@. sys/miscfs/genfs/genfs_vnops.c: revision 1.104 via patch don't write-protect wired pages. pointed by Chuck Silvers. for now, leave a vnode on the syncer's queue, as suggested by him. sys/ufs/ffs/ffs_vnops.c: revision 1.72 revert VCHR part of ffs_vnops.c 1.71. as VCHR uses the device pager, no point to call VOP_PUTPAGES here. pointed by Chuck Silvers.
1.98.2.10	24-Mar-2008	yamt	sync with head.
1.98.2.9	11-Feb-2008	yamt	sync with head.
1.98.2.8	04-Feb-2008	yamt	sync with head.
1.98.2.7	21-Jan-2008	yamt	sync with head
1.98.2.6	07-Dec-2007	yamt	sync with head
1.98.2.5	27-Oct-2007	yamt	sync with head.
1.98.2.4	03-Sep-2007	yamt	sync with head.
1.98.2.3	26-Feb-2007	yamt	sync with head.
1.98.2.2	30-Dec-2006	yamt	sync with head.
1.98.2.1	21-Jun-2006	yamt	sync with head.
1.107.2.1	20-Oct-2005	yamt	remove genfs_fsync.
1.109.2.4	19-Nov-2005	yamt	remove contextless read-ahead code.
1.109.2.3	18-Nov-2005	yamt	- associate read-ahead context to vnode, rather than file. - revert VOP_READ prototype.
1.109.2.2	15-Nov-2005	yamt	adapt ffs, lfs, nfs.
1.109.2.1	14-Nov-2005	yamt	disable genfs readahead.
1.118.2.3	01-Feb-2006	yamt	sync with head.
1.118.2.2	15-Jan-2006	yamt	sync with head.
1.118.2.1	31-Dec-2005	yamt	adapt some random parts of kernel to uio_vmspace.
1.121.4.2	01-Jun-2006	kardel	Sync with head.
1.121.4.1	22-Apr-2006	simonb	Sync with head.
1.121.2.1	09-Sep-2006	rpaulo	sync with head
1.122.6.2	24-May-2006	tron	Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
1.122.6.1	31-Mar-2006	tron	Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.
1.122.4.3	06-May-2006	christos	- Move kauth_cred_t declaration to <sys/types.h> - Cleanup struct ucred; forward declarations that are unused. - Don't include <sys/kauth.h> in any header, but include it in the c files that need it. Approved by core.
1.122.4.2	19-Apr-2006	elad	sync with head.
1.122.4.1	08-Mar-2006	elad	Adapt to kernel authorization KPI.
1.122.2.5	11-Aug-2006	yamt	sync with head
1.122.2.4	24-May-2006	yamt	sync with head.
1.122.2.3	11-Apr-2006	yamt	sync with head
1.122.2.2	01-Apr-2006	yamt	sync with head.
1.122.2.1	05-Mar-2006	yamt	separate page replacement policy from the rest of kernel.
1.128.4.4	01-Feb-2007	ad	Sync with head.
1.128.4.3	30-Jan-2007	ad	Remove support for SA. Ok core@.
1.128.4.2	12-Jan-2007	ad	Sync with head.
1.128.4.1	18-Nov-2006	ad	Sync with head.
1.129.2.3	18-Dec-2006	yamt	sync with head.
1.129.2.2	10-Dec-2006	yamt	sync with head.
1.129.2.1	22-Oct-2006	yamt	sync with head
1.140.4.1	03-Sep-2007	wrstuden	Sync w/ NetBSD-4-RC_1
1.140.2.1	05-Jun-2007	bouyer	Pull up following revision(s) (requested by perseant in ticket #703): sys/miscfs/genfs/genfs.h 1.21 sys/miscfs/genfs/genfs_vnops.c 1.151 sys/ufs/lfs/lfs.h 1.119, 1.120 sys/ufs/lfs/lfs_bio.c 1.99-101 sys/ufs/lfs/lfs_extern.h 1.89 sys/ufs/lfs/lfs_inode.c 1.108, 1.109 sys/ufs/lfs/lfs_segment.c 1.197, 1.199, 1.200 sys/ufs/lfs/lfs_subr.c 1.69, 1.70 sys/ufs/lfs/lfs_syscalls.c 1.119 sys/ufs/lfs/lfs_vfsops.c 1.234, 1.235 sys/ufs/lfs/lfs_vnops.c 1.195, 1.196, 1.200, 1.202-206 Reduce busy waiting in lfs_putpages(), and other LFS improvements.
1.146.2.4	17-May-2007	yamt	sync with head.
1.146.2.3	07-May-2007	yamt	sync with head.
1.146.2.2	12-Mar-2007	rmind	Sync with HEAD.
1.146.2.1	27-Feb-2007	yamt	- sync with head. - move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.
1.150.4.1	11-Jul-2007	mjf	Sync with head.
1.150.2.15	23-Oct-2007	ad	Sync with head.
1.150.2.14	16-Sep-2007	ad	Checkpoint work in progress on the vnode lifecycle and reference counting stuff. This makes it work properly without kernel_lock and fixes a few quite old bugs. See vfs_subr.c 1.283.2.17 for details.
1.150.2.13	01-Sep-2007	yamt	fix a race and add a comment about it.
1.150.2.12	24-Aug-2007	ad	Sync with buffer cache locking changes. See buf.h/vfs_bio.c for details. Some minor portions are incomplete and needs to be verified as a whole.
1.150.2.11	21-Aug-2007	yamt	fix some races around pagedaemon and uvm_wait. ok'ed by Andrew Doran.
1.150.2.10	19-Aug-2007	ad	- Back out the biodone() changes. - Eliminate B_ERROR (from HEAD).
1.150.2.9	23-Jun-2007	ad	- Lock v_cleanblkhd, v_dirtyblkhd, v_numoutput with the vnode's interlock. Get rid of global_v_numoutput_lock. Partially incomplete as the buffer cache locking doesn't work very well and needs an overhaul. - Some changes to try and make softdep MP safe. Untested.
1.150.2.8	17-Jun-2007	ad	- Increase the number of thread priorities from 128 to 256. How the space is set up is to be revisited. - Implement soft interrupts as kernel threads. A generic implementation is provided, with hooks for fast-path MD code that can run the interrupt threads over the top of other threads executing in the kernel. - Split vnode::v_flag into three fields, depending on how the flag is locked (by the interlock, by the vnode lock, by the file system). - Miscellaneous locking fixes and improvements.
1.150.2.7	09-Jun-2007	ad	Sync with head.
1.150.2.6	08-Jun-2007	ad	Sync with head.
1.150.2.5	13-Apr-2007	ad	- Fix a (new) bug where vget tries to acquire freed vnodes' interlocks. - Minor locking fixes.
1.150.2.4	09-Apr-2007	ad	- Add two new arguments to kthread_create1: pri_t pri, bool mpsafe. - Fork kthreads off proc0 as new LWPs, not new processes.
1.150.2.3	05-Apr-2007	ad	Compile fixes.
1.150.2.2	21-Mar-2007	ad	- Replace more simple_locks, and fix up in a few places. - Use condition variables. - LOCK_ASSERT -> KASSERT.
1.150.2.1	13-Mar-2007	ad	Pull in the initial set of changes for the vmlocking branch.
1.155.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.156.10.2	29-Jul-2007	ad	It's not a good idea for device drivers to modify b_flags, as they don't need to understand the locking around that field. Instead of setting B_ERROR, set b_error instead. b_error is 'owned' by whoever completes the I/O request.
1.156.10.1	29-Jul-2007	ad	file genfs_vnops.c was added on branch matt-mips64 on 2007-07-29 12:15:47 +0000
1.156.8.2	18-Oct-2007	yamt	sync with head.
1.156.8.1	14-Oct-2007	yamt	sync with head.
1.156.6.3	23-Mar-2008	matt	sync with HEAD
1.156.6.2	09-Jan-2008	matt	sync with HEAD
1.156.6.1	06-Nov-2007	matt	sync with HEAD
1.156.4.2	09-Dec-2007	jmcneill	Sync with HEAD.
1.156.4.1	26-Oct-2007	joerg	Sync with HEAD. Follow the merge of pmap.c on i386 and amd64 and move pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup code to restore CR4 before jumping back into kernel space as the large page option might cover that.
1.158.6.2	08-Dec-2007	ad	Sync with head.
1.158.6.1	04-Dec-2007	ad	Pull the vmlocking changes into a new branch.
1.158.4.2	18-Feb-2008	mjf	Sync with HEAD.
1.158.4.1	08-Dec-2007	mjf	Sync with HEAD.
1.159.4.2	19-Jan-2008	bouyer	Sync with HEAD
1.159.4.1	02-Jan-2008	bouyer	Sync with HEAD
1.164.6.2	02-Jun-2008	mjf	Sync with HEAD.
1.164.6.1	03-Apr-2008	mjf	Sync with HEAD.
1.165.2.1	18-May-2008	yamt	sync with head.
1.166.2.7	09-Oct-2010	yamt	sync with head
1.166.2.6	11-Aug-2010	yamt	sync with head.
1.166.2.5	11-Mar-2010	yamt	sync with head
1.166.2.4	18-Jul-2009	yamt	sync with head.
1.166.2.3	16-May-2009	yamt	sync with head
1.166.2.2	04-May-2009	yamt	sync with head.
1.166.2.1	16-May-2008	yamt	sync with head.
1.167.18.1	20-May-2011	matt	bring matt-nb5-mips64 up to date with netbsd-5-1-RELEASE (except compat).
1.167.16.1	07-Sep-2010	bouyer	Pull up following revision(s) (requested by chs in ticket #1448): sys/uvm/uvm_pager.h: revision 1.39 via patch sys/miscfs/genfs/genfs_vnops.c: revision 1.183 via patch sys/ufs/ufs/ufs_inode.c: revision 1.83 via patch sys/miscfs/genfs/genfs_io.c: revision 1.40 via patch sys/miscfs/genfs/genfs_node.h: revision 1.20 via patch replace the earlier workaround for PR 40389 with a better fix. the earlier change caused data corruption by freeing pages without invaliding their mappings. instead of the trylock/retry, just take the genfs-node lock before calling VOP_GETPAGES() and pass a new flag to tell it that we're already holding this lock.
1.167.14.2	23-Jul-2009	jym	Sync with HEAD.
1.167.14.1	13-May-2009	jym	Sync with HEAD. Commit is split, to avoid a "too many arguments" protocol error.
1.167.10.1	07-Sep-2010	bouyer	Pull up following revision(s) (requested by chs in ticket #1448): sys/uvm/uvm_pager.h: revision 1.39 via patch sys/miscfs/genfs/genfs_vnops.c: revision 1.183 via patch sys/ufs/ufs/ufs_inode.c: revision 1.83 via patch sys/miscfs/genfs/genfs_io.c: revision 1.40 via patch sys/miscfs/genfs/genfs_node.h: revision 1.20 via patch replace the earlier workaround for PR 40389 with a better fix. the earlier change caused data corruption by freeing pages without invaliding their mappings. instead of the trylock/retry, just take the genfs-node lock before calling VOP_GETPAGES() and pass a new flag to tell it that we're already holding this lock.
1.167.8.1	28-Apr-2009	skrll	Sync with HEAD.
1.176.4.4	05-Mar-2011	rmind	sync with head
1.176.4.3	03-Jul-2010	rmind	sync with head
1.176.4.2	30-May-2010	rmind	sync with head
1.176.4.1	16-Mar-2010	rmind	Change struct uvm_object::vmobjlock to be dynamically allocated with mutex_obj_alloc(). It allows us to share the locks among UVM objects.
1.176.2.3	22-Oct-2010	uebayasi	Sync with HEAD (-D20101022).
1.176.2.2	17-Aug-2010	uebayasi	Sync with HEAD.
1.176.2.1	30-Apr-2010	uebayasi	Sync with HEAD.
1.186.6.1	23-Jun-2011	cherry	Catchup with rmind-uvmplock merge.
1.187.6.1	05-Apr-2012	mrg	sync to latest -current.
1.187.2.2	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.187.2.1	17-Apr-2012	yamt	sync with head
1.189.4.1	18-May-2014	rmind	sync with head
1.189.2.2	03-Dec-2017	jdolecek	update from HEAD
1.189.2.1	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.192.14.1	08-Jul-2017	snj	Pull up following revision(s) (requested by christos in ticket #1442): sys/kern/kern_event.c: revision 1.92 via patch sys/miscfs/genfs/genfs_vnops.c: revision 1.198 via patch sys/sys/event.h: revision 1.30 via patch Provide EVFILT_WRITE; this is what FreeBSD does and go wants it. Makes go unit tests pass. -- fix file descriptor locking (from joerg). fixes kernel crashes by running go
1.192.10.2	26-Apr-2017	pgoyette	Sync with HEAD
1.192.10.1	20-Mar-2017	pgoyette	Sync with HEAD
1.192.8.1	08-Jul-2017	snj	Pull up following revision(s) (requested by christos in ticket #1442): sys/kern/kern_event.c: revision 1.92 via patch sys/miscfs/genfs/genfs_vnops.c: revision 1.198 via patch sys/sys/event.h: revision 1.30 via patch Provide EVFILT_WRITE; this is what FreeBSD does and go wants it. Makes go unit tests pass. -- fix file descriptor locking (from joerg). fixes kernel crashes by running go
1.192.6.2	28-Aug-2017	skrll	Sync with HEAD
1.192.6.1	05-Feb-2017	skrll	Sync with HEAD
1.192.4.1	08-Jul-2017	snj	Pull up following revision(s) (requested by christos in ticket #1442): sys/kern/kern_event.c: revision 1.92 via patch sys/miscfs/genfs/genfs_vnops.c: revision 1.198 via patch sys/sys/event.h: revision 1.30 via patch Provide EVFILT_WRITE; this is what FreeBSD does and go wants it. Makes go unit tests pass. -- fix file descriptor locking (from joerg). fixes kernel crashes by running go
1.193.2.1	21-Apr-2017	bouyer	Sync with HEAD
1.195.4.2	05-Jul-2017	snj	Pull up following revision(s) (requested by christos in ticket #91): sys/kern/kern_event.c: revision 1.92 sys/miscfs/genfs/genfs_vnops.c: revision 1.198 sys/sys/event.h: revision 1.30 Provide EVFILT_WRITE; this is what FreeBSD does and go wants it. Makes go unit tests pass. -- fix file descriptor locking (from joerg). fixes kernel crashes by running go
1.195.4.1	04-Jun-2017	bouyer	pullup the following revisions, requested by hannken in ticket #2: src/share/man/man9/fstrans.9 1.25 src/sys/kern/vfs_mount.c 1.66 src/sys/kern/vfs_subr.c 1.468 src/sys/kern/vfs_trans.c 1.46 src/sys/kern/vfs_vnode.c 1.94, 1.95, 1.96 src/sys/kern/vnode_if.c 1.105, 1.106 src/sys/kern/vnode_if.sh 1.65, 1.66 src/sys/kern/vnode_if.src 1.76 src/sys/miscfs/genfs/genfs_io.c 1.69 src/sys/miscfs/genfs/genfs_vnops.c 1.196, 1.197 src/sys/miscfs/genfs/layer_extern.h 1.40 src/sys/miscfs/genfs/layer_vfsops.c 1.51 src/sys/miscfs/genfs/layer_vnops.c 1.67 src/sys/miscfs/nullfs/null_vnops.c 1.42 src/sys/miscfs/overlay/overlay_vnops.c 1.24 src/sys/miscfs/umapfs/umap_vnops.c 1.60 src/sys/rump/include/rump/rumpvnode_if.h 1.29, 1.30 src/sys/rump/librump/rumpkern/emul.c 1.182 src/sys/rump/librump/rumpvfs/rumpvnode_if.c 1.29, 1.30 src/sys/sys/fstrans.h 1.11 src/sys/sys/vnode.h 1.278 src/sys/sys/vnode_if.h 1.100, 1.101 src/sys/sys/vnode_impl.h 1.14, 1.15 src/sys/ufs/lfs/lfs_pages.c 1.12 Vnode state, lock and fstrans cleanup: - Rename vnode state "VS_ACTIVE" to "VS_LOADED" and add synthetic state "VS_ACTIVE" to assert a loaded vnode with usecount > 0. - Redo FSTRANS in vnode_if.c and use it for VOP_LOCK and VOP_UNLOCK. - Cleanup the genfs lock operations. - Make "struct vnode_impl" member "vi_lock" a krwlock_t again. - Remove the lock type argument from fstrans_start and fstrans_start_nowait, remove now unused FSTRANS state "FSTRANS_SUSPENDING".
1.199.4.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.200.2.4	29-Feb-2020	ad	Sync with head.
1.200.2.3	24-Jan-2020	ad	vnodes: - Have own v_usecount again, don't share the uvm_object's refcount. - Cluster the members of vnode_t and vnode_impl_t in a cache-concious way. - Go back to having vi_lock directly in vnode_impl_t. - Go back to having v_usecount adjusted with atomics. - Start adjusting v_holdcnt with atomics, too. - Put all the namecache stuff back into vnode_impl_t.
1.200.2.2	22-Jan-2020	ad	Make sure LK_UPGRADE always comes with LK_NOWAIT; dropping the lock in here is unclean and I wonder if it could screw over fstrans.
1.200.2.1	18-Jan-2020	ad	Allow VOP_LOCK(LK_NONE).
1.210.6.1	01-Aug-2021	thorpej	Sync with HEAD.
1.219.4.1	05-Mar-2023	martin	Pull up following revision(s) (requested by hannken in ticket #111): sys/miscfs/genfs/genfs_vnops.c: revision 1.220 Fix genfs_can_chtimes() to also handle the condition: If the time pointer is null, then write permission on the file is also sufficient. From FreeBSD. Should fix PR kern/57246 "NFS group permissions regression"

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