Commit Graph

450 Commits

Author SHA1 Message Date
Bruce Evans
a395dbb153 Avoid a 64-bit division in procfs_readdir(). Fixed related overflows.
Check args using the same expression as in fdesc and kernfs.  The check
was actually already correct, modulo overflow.  It could be tightened
up to either allow huge (aligned) offsets, treating them as EOF, or
disallow all offsets beyond EOF.

Didn't fix invalid address calculation &foo[i] where i may be out of
bounds.

Didn't fix shooting of foot using a private unportable dirent struct.
1998-06-14 12:53:39 +00:00
Bruce Evans
a41878a77a Avoid a 64-bit division in fdesc_readdir(). Fixed related overflows
and missing arg checking.

Panic instead of returning bogus error codes or forgetting to check
all cases if fdesc_readdir() gets called for a non-directory.  This
can't happen.
1998-06-14 08:46:41 +00:00
Doug Rabson
9d8b200937 Make these files compile. 1998-06-10 21:21:31 +00:00
Alexander Langer
6ead682113 ENOPNOTSUPP --> EOPNOTSUPP
PR:		6906
Submitted by:	Steven G. Kargl <kargl@troutmask.apl.washington.edu>
1998-06-10 19:56:06 +00:00
Dmitrij Tejblum
40b0939a15 Back out previous change. This behavior is at least completely
"susv2"-compliant.
1998-06-10 13:46:46 +00:00
Dmitrij Tejblum
75065d2cd8 Also return EOPNOTSUPP rather than EINVAL for not supported owner and group
changes.
1998-06-10 11:36:01 +00:00
Peter Wemm
7a204420d3 Don't silently accept attempts to change flags where they are not
supported.
1998-06-10 06:34:57 +00:00
Peter Wemm
c3a24f69d9 Return EOPNOTSUPP rather than EINVAL for flags that are not supported. 1998-06-10 06:30:31 +00:00
Dmitrij Tejblum
ffbdd68eba Fix typo in a comment. 1998-06-09 13:20:29 +00:00
Doug Rabson
ecbb00a262 This commit fixes various 64bit portability problems required for
FreeBSD/alpha.  The most significant item is to change the command
argument to ioctl functions from int to u_long.  This change brings us
inline with various other BSD versions.  Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.
1998-06-07 17:13:14 +00:00
John Dyson
cf2819ccb8 Make flushing dirty pages work correctly on filesystems that
unexpectedly do not complete writes even with sync I/O requests.
This should help the behavior of mmaped files when using
softupdates (and perhaps in other circumstances also.)
1998-05-21 07:47:58 +00:00
Tor Egge
afc6ea238f Disallow reading the current kernel stack. Only the user structure and
the current registers should be accessible.
Reviewed by:	David Greenman <dg@root.com>
1998-05-19 00:00:14 +00:00
Dmitrij Tejblum
af9f1d50ae Fix priority bug in previous commit.
Submitted by:	bde
1998-05-18 10:24:26 +00:00
Dmitrij Tejblum
011cdb576c Fix support for pre-Win95 filesystems: Make it possible to lookup just
created short file name. Don't insert "generation numbers".
1998-05-17 21:18:08 +00:00
Dmitrij Tejblum
058ef24617 Remove bogus LK_RETRY.
Submitted by:	bde
1998-05-17 21:03:35 +00:00
Bruce Evans
5097a20d6e Don't forget to clean up after an error reading the directory entry
in deget().
1998-05-17 18:09:28 +00:00
Bruce Evans
84de3fb77d Removed vestiges of pre-Lite2 locking. 1998-05-17 18:00:45 +00:00
Poul-Henning Kamp
c21410e119 s/nanoruntime/nanouptime/g
s/microruntime/microuptime/g

Reviewed by:	bde
1998-05-17 11:53:46 +00:00
Søren Schmidt
0e1e9fdca6 Cleanup after Garret, include unpch.h to get at various macros.. 1998-05-17 09:37:39 +00:00
Dmitrij Tejblum
191e6fd0b6 Fix off by ane error in previous commit.
This caused following commands:
	mkdir z
	cd z
	touch A B
	mv B A
corrupt the '..' entry in 'z'.

Reported by:	bde
1998-05-09 09:36:38 +00:00
Mike Smith
7be2d30077 In the words of the submitter:
---------
Make callers of namei() responsible for releasing references or locks
instead of having the underlying filesystems do it.  This eliminates
redundancy in all terminal filesystems and makes it possible for stacked
transport layers such as umapfs or nullfs to operate correctly.

Quality testing was done with testvn, and lat_fs from the lmbench suite.

Some NFS client testing courtesy of Patrik Kudo.

vop_mknod and vop_symlink still release the returned vpp.  vop_rename
still releases 4 vnode arguments before it returns.  These remaining cases
will be corrected in the next set of patches.
---------

Submitted by:	Michael Hancock <michaelh@cet.co.jp>
1998-05-07 04:58:58 +00:00
Mike Smith
79cc756d8b As described by the submitter:
Reverse the VFS_VRELE patch.  Reference counting of vnodes does not need
to be done per-fs.  I noticed this while fixing vfs layering violations.
Doing reference counting in generic code is also the preference cited by
John Heidemann in recent discussions with him.

The implementation of alternative vnode management per-fs is still a valid
requirement for some filesystems but will be revisited sometime later,
most likely using a different framework.

Submitted by:	Michael Hancock <michaelh@cet.co.jp>
1998-05-06 05:29:41 +00:00
Dmitrij Tejblum
c681be377c Use DFLTBSIZE instead of MAXBSIZE for pm_fatblksize.
In msdosfs_sync: spelling fix, formatting changes; fix MNT_LAZY (sync
modified denodes, don't sync device)

Mostly submitted by (and with hints from):	bde

Increase limit for maximum disk size: as far as I can see previous limit was
gratuitously too low.
1998-04-29 12:55:51 +00:00
John Dyson
c0877f103f Tighten up management of memory and swap space during map allocation,
deallocation cycles.  This should provide a measurable improvement
on swap and memory allocation on loaded systems.  It is unlikely a
complete solution.  Also, provide more map info with procfs.
Chuck Cranor spurred on this improvement.
1998-04-29 04:28:22 +00:00
Julian Elischer
ff1f112b1a The 'mountroot' option is obviously pointless for an LKM
so allow LKM compilation to succeed by making it go away for that case.
Saves needing to include opt_devfs.h which an LKM cannot rely on anyhow.
1998-04-20 23:18:46 +00:00
Julian Elischer
c0bab11dfe Make the devfs SLICE option a standard type option.
(hopefully it will go away eventually anyhow)
1998-04-20 03:57:41 +00:00
Julian Elischer
3e425b968d Add changes and code to implement a functional DEVFS.
This code will be turned on with the TWO options
DEVFS and SLICE. (see LINT)
Two labels PRE_DEVFS_SLICE and POST_DEVFS_SLICE will deliniate these changes.

/dev will be automatically mounted by init (thanks phk)
on bootup. See /sys/dev/slice/slice.4 for more info.
All code should act the same without these options enabled.

Mike Smith, Poul Henning Kamp, Soeren, and a few dozen others

This code does not support the following:
bad144 handling.
Persistance. (My head is still hurting from the last time we discussed this)
ATAPI flopies are not handled by the SLICE code yet.

When this code is running, all major numbers are arbitrary and COULD
be dynamically assigned. (this is not done, for POLA only)
Minor numbers for disk slices ARE arbitray and dynamically assigned.
1998-04-19 23:32:49 +00:00
Dag-Erling Smørgrav
dc73342347 Seventy-odd "its" / "it's" typos in comments fixed as per kern/6108. 1998-04-17 22:37:19 +00:00
Bruce Evans
c1087c1324 Support compiling with `gcc -ansi'. 1998-04-15 17:47:40 +00:00
Dmitrij Tejblum
206faeeef7 Add a missing LK_RETRY.
Noticed by: Bruce (almost 2 monts ago)

Remove a debugging printf.
1998-04-15 11:04:53 +00:00
Poul-Henning Kamp
7cd5051bec Use random() rather then than homegrown stuff. 1998-04-06 11:39:04 +00:00
Andrey A. Chernov
aaf0bb1961 Print explanation diagnostics when mount is impossible
Submitted by: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-04-05 13:10:11 +00:00
Poul-Henning Kamp
00af9731c9 Time changes mark 2:
* Figure out UTC relative to boottime.  Four new functions provide
      time relative to boottime.

    * move "runtime" into struct proc.  This helps fix the calcru()
      problem in SMP.

    * kill mono_time.

    * add timespec{add|sub|cmp} macros to time.h.  (XXX: These may change!)

    * nanosleep, select & poll takes long sleeps one day at a time

Reviewed by:    bde
Tested by:      ache and others
1998-04-04 13:26:20 +00:00
Andrey A. Chernov
32d3966f1a Fix dead hang writing to FAT
Submitted by: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-03-28 07:22:03 +00:00
Poul-Henning Kamp
a0502b19d4 Add two new functions, get{micro|nano}time.
They are atomic, but return in essence what is in the "time" variable.
gettime() is now a macro front for getmicrotime().

Various patches to use the two new functions instead of the various
hacks used in their absence.

Some puntuation and grammer patches from Bruce.

A couple of XXX comments.
1998-03-26 20:54:05 +00:00
KATO Takenori
a8e4411603 Deleted 1024bytes/sector floppy code for PC-98 arch. The
1024bytes/sector code has not worked for long time and it should be
re-implemented.
1998-03-20 02:33:42 +00:00
KATO Takenori
b2bde4cb07 If lowervp is NULLVP, vap was clobbered.
Submitted by:	Naofumi Honda <honda@Kururu.math.sci.hokudai.ac.jp>
Obtained from:	NetBSD/pc98
1998-03-17 08:47:50 +00:00
Julian Elischer
b1897c197c Reviewed by: dyson@freebsd.org (john Dyson), dg@root.com (david greenman)
Submitted by:	Kirk McKusick (mcKusick@mckusick.com)
Obtained from:  WHistle development tree
1998-03-08 09:59:44 +00:00
John Dyson
2abc1ef602 Initialize b_resid, and also print out better diagnostics on I/O
errors.  This will allow for better tracking of user error reports.
1998-03-08 08:46:18 +00:00
John Dyson
8f9110f6a1 This mega-commit is meant to fix numerous interrelated problems. There
has been some bitrot and incorrect assumptions in the vfs_bio code.  These
problems have manifest themselves worse on NFS type filesystems, but can
still affect local filesystems under certain circumstances.  Most of
the problems have involved mmap consistancy, and as a side-effect broke
the vfs.ioopt code.  This code might have been committed seperately, but
almost everything is interrelated.

1)	Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that
	are fully valid.
2)	Rather than deactivating erroneously read initial (header) pages in
	kern_exec, we now free them.
3)	Fix the rundown of non-VMIO buffers that are in an inconsistent
	(missing vp) state.
4)	Fix the disassociation of pages from buffers in brelse.  The previous
	code had rotted and was faulty in a couple of important circumstances.
5)	Remove a gratuitious buffer wakeup in vfs_vmio_release.
6)	Remove a crufty and currently unused cluster mechanism for VBLK
	files in vfs_bio_awrite.  When the code is functional, I'll add back
	a cleaner version.
7)	The page busy count wakeups assocated with the buffer cache usage were
	incorrectly cleaned up in a previous commit by me.  Revert to the
	original, correct version, but with a cleaner implementation.
8)	The cluster read code now tries to keep data associated with buffers
	more aggressively (without breaking the heuristics) when it is presumed
	that the read data (buffers) will be soon needed.
9)	Change to filesystem lockmgr locks so that they use LK_NOPAUSE.  The
	delay loop waiting is not useful for filesystem locks, due to the
	length of the time intervals.
10)	Correct and clean-up spec_getpages.
11)	Implement a fully functional nfs_getpages, nfs_putpages.
12)	Fix nfs_write so that modifications are coherent with the NFS data on
	the server disk (at least as well as NFS seems to allow.)
13)	Properly support MS_INVALIDATE on NFS.
14)	Properly pass down MS_INVALIDATE to lower levels of the VM code from
	vm_map_clean.
15)	Better support the notion of pages being busy but valid, so that
	fewer in-transit waits occur.  (use p->busy more for pageouts instead
	of PG_BUSY.)  Since the page is fully valid, it is still usable for
	reads.
16)	It is possible (in error) for cached pages to be busy.  Make the
	page allocation code handle that case correctly.  (It should probably
	be a printf or panic, but I want the system to handle coding errors
	robustly.  I'll probably add a printf.)
17)	Correct the design and usage of vm_page_sleep.  It didn't handle
	consistancy problems very well, so make the design a little less
	lofty.  After vm_page_sleep, if it ever blocked, it is still important
	to relookup the page (if the object generation count changed), and
	verify it's status (always.)
18)	In vm_pageout.c, vm_pageout_clean had rotted, so clean that up.
19)	Push the page busy for writes and VM_PROT_READ into vm_pageout_flush.
20)	Fix vm_pager_put_pages and it's descendents to support an int flag
	instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
Mike Smith
651ae11e2f Trivial filesystem getpages/putpages implementations, set the second.
These should be considered the first steps in a work-in-progress.
Submitted by:	Terry Lambert <terry@freebsd.org>
1998-03-06 09:46:52 +00:00
John Dyson
aeb52ab0eb Fix certain kinds of block device operations. For example, tunefs on
a block device shouldn't crash the system anymore.
1998-03-04 06:44:59 +00:00
Mike Smith
3f75478c2e Patch to the last commit; attempt to unspam stuff from NetBSD.
Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-03-03 02:50:24 +00:00
Mike Smith
34bdbbd0de The intent is to get rid of WILLRELE in vnode_if.src by making
a complement to all ops that return a vpp, VFS_VRELE.  This is
initially only for file systems that implement the following ops
that do a WILLRELE:

	vop_create, vop_whiteout, vop_mknod, vop_remove, vop_link,
	vop_rename, vop_mkdir, vop_rmdir, vop_symlink

This is initial DNA that doesn't do anything yet.  VFS_VRELE is
implemented but not called.

A default vfs_vrele was created for fs implementations that use the
standard vnode management routines.

VFS_VRELE implementations were made for the following file systems:

Standard (vfs_vrele)
	ffs mfs nfs msdosfs devfs ext2fs

Custom
	union umapfs

Just EOPNOTSUPP
	fdesc procfs kernfs portal cd9660

These implementations may change as VOP changes are implemented.

In the next phase, in the vop implementations calls to vrele and the vrele
part of vput will be moved to the top layer vfs_vnops and made visible
to all layers.  vput will be replaced by unlock in these cases.  Unlocking
will still be done in the per fs layer but the refcount decrement will be
triggered at the top because it doesn't hurt to hold a vnode reference a
little longer.  This will have minimal impact on the structure of the
existing code.

This will only be done for vnode arguments that are released by the various
fs vop implementations.

Wider use of VFS_VRELE will likely require restructuring of the code.

Reviewed by:	phk, dyson, terry et. al.
Submitted by:	Michael Hancock <michaelh@cet.co.jp>
1998-03-01 22:46:53 +00:00
Mike Smith
ea0665cd2b Fix mmap() on msdosfs. In the words of the submitter:
|In the process of evaluating the getpages/putpages issues I discovered
|that mmap on MSDOSFS does not work. This is because I blindly merged
|NetBSD changes in msdosfs_bmap and msdosfs_strategy. Apparently, their
|blocksize is always DEV_BSIZE (even in files), while in FreeBSD
|blocksize in files is v_mount->mnt_stat.f_iosize (i.e. clustersize in
|MSDOSFS case). The patch is below.

Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-03-01 21:26:09 +00:00
Mike Smith
cce0eefd5a Fix a problem with the conversion of Unix filenames into the VFAT
namespace.
Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-02-27 12:22:22 +00:00
Mike Smith
69a36f24fb Fixes for some bugs in the VFAT/FAT32 support:
- 'mv longnamedfile1 longnamedfile2' would cause longnamedfile2 to lose its
   long name.
 - Long names have trailing spaces/dots stripped for lookup as well as
   assignment.
 - A lockup when the mdsosfs was accessed from within the Linux emulator is fixed.
 - A bug whereby long filenames were recognised by Microsoft operating systems but
   not FreeBSD is fixed.

Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
1998-02-26 06:45:46 +00:00
KATO Takenori
589421d418 Deleted KLOCK-hack. 1998-02-26 03:23:56 +00:00
Andrey A. Chernov
5114f1d7c6 Back out "always view in lowercase" part
Return to previous variant "comparing in lowercase" in winChkName
1998-02-24 14:13:16 +00:00
Andrey A. Chernov
7391f6114e Implement loadable DOS<->local conversion tables for DOS names
Always create DOS name in uppercase
Always view DOS name in lowercase
1998-02-23 16:44:37 +00:00
KATO Takenori
efa0ac5b6f Fix signatures of NEC's DOS formats.
Submitted by:	Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>
1998-02-23 14:57:50 +00:00
Andrey A. Chernov
64fb806ca2 Oops, add missing bcopy of upper->lower table 1998-02-23 09:59:08 +00:00
Andrey A. Chernov
b998efa98d Implement loadable upper->lower local conversion table 1998-02-23 09:39:29 +00:00
Andrey A. Chernov
a4f93748d2 Reduce new arguments number added in my changes 1998-02-22 18:00:54 +00:00
Andrey A. Chernov
4d63452f4e Add Unicode support to winChkName, now lookup works! 1998-02-22 17:26:27 +00:00
Andrey A. Chernov
13df76f25a Implement loadable local<->unicode file names conversion
Note: it produce correct names only for Win95, DOS names are still
incorrect and need similar work
mount_msdos support coming soon
1998-02-22 15:09:54 +00:00
Andrey A. Chernov
794d43e27f Replace all unknown Unicode characters with '?' in win->unix mapping 1998-02-22 12:22:23 +00:00
Andrey A. Chernov
2b5b6623f6 Add initial support to map 0x4XX Unicode Cyrillic range names:
only win->unix part is implemented at this time with 256-byte
table defaulted to KOI8-R (will be loadable in future).
Since back mapping not supported yet, you'll get "No such file or directory"
on each Cyrillic name with 'ls -l', only 'echo *' work at this moment.
Teach current code to understand Unicode a bit.
1998-02-22 12:05:42 +00:00
Bruce Evans
39e4376ba7 Removed unused #includes. 1998-02-20 13:11:54 +00:00
Jordan K. Hubbard
952a6212d9 Update MSDOSFS code using NetBSD's msdosfs as a guide to support
FAT32 partitions.  Unfortunately, we looked around here at
Walnut Creek CDROM for any newer FAT32-supporting versions
of Win95 and we were unsuccessful; only the older stuff here.
So this is untested beyond simply making sure it compiles and
someone with access to an actual FAT32 fs will have
to let us know how well it actually works.
Submitted by:	Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>
Obtained from:	NetBSD
1998-02-18 09:28:47 +00:00
KATO Takenori
3e7e515734 Deleted unused variable. 1998-02-10 08:04:31 +00:00
KATO Takenori
d6476ada99 Undo UN_KLOCK hack except union_allocvp(). Now, vput() doesn't lock
the vnode.
1998-02-10 03:32:07 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
KATO Takenori
ca6f868824 Fixed pagefault when cred == NOCRED.
PR:		5632
1998-02-07 01:36:24 +00:00
KATO Takenori
39ca14f032 Fixed number of entries in gid-mapfile.
PR:		5640
1998-02-07 01:34:32 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
KATO Takenori
87884aad6e Workarround for DIAGNOSTIC kernel's panic in union_lookup().
Union_removed_upper() clobbers cache when file is removed.
Upper vp will be removed by union_reclaim().
1998-02-06 02:42:21 +00:00
John Dyson
95461b450d 1) Start using a cleaner and more consistant page allocator instead
of the various ad-hoc schemes.
2)	When bringing in UPAGES, the pmap code needs to do another vm_page_lookup.
3)	When appropriate, set the PG_A or PG_M bits a-priori to both avoid some
	processor errata, and to minimize redundant processor updating of page
	tables.
4)	Modify pmap_protect so that it can only remove permissions (as it
	originally supported.)  The additional capability is not needed.
5)	Streamline read-only to read-write page mappings.
6)	For pmap_copy_page, don't enable write mapping for source page.
7)	Correct and clean-up pmap_incore.
8)	Cluster initial kern_exec pagin.
9)	Removal of some minor lint from kern_malloc.
10)	Correct some ioopt code.
11)	Remove some dead code from the MI swapout routine.
12)	Correct vm_object_deallocate (to remove backing_object ref.)
13)	Fix dead object handling, that had problems under heavy memory load.
14)	Add minor vm_page_lookup improvements.
15)	Some pages are not in objects, and make sure that the vm_page.c can
	properly support such pages.
16)	Add some more page deficit handling.
17)	Some minor code readability improvements.
1998-02-05 03:32:49 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Bruce Evans
9cf2c3e77a Forward declare some structs so that this file is more self-sufficient. 1998-02-03 21:52:02 +00:00
Bruce Evans
c53e436efc Forward declare some structs so that this file is more self-sufficient.
Don't declare kernel objects or functions unless KERNEL is defined.
1998-02-03 21:39:30 +00:00
KATO Takenori
4e649c4174 Declare the variable `i' when UMAP_DIAGNOSTIC is defined. 1998-02-03 14:30:01 +00:00
Eivind Eklund
3f2076daf5 Make the debug options new-style.
This also zaps a DPT option from lint; it wasn't referenced from
anywhere.
1998-01-31 07:23:16 +00:00
KATO Takenori
9758931d62 Fixed typo in comment. 1998-01-25 09:44:33 +00:00
John Dyson
2d8acc0f4a VM level code cleanups.
1)	Start using TSM.
	Struct procs continue to point to upages structure, after being freed.
	Struct vmspace continues to point to pte object and kva space for kstack.
	u_map is now superfluous.
2)	vm_map's don't need to be reference counted.  They always exist either
	in the kernel or in a vmspace.  The vmspaces are managed by reference
	counts.
3)	Remove the "wired" vm_map nonsense.
4)	No need to keep a cache of kernel stack kva's.
5)	Get rid of strange looking ++var, and change to var++.
6)	Change more data structures to use our "zone" allocator.  Added
	struct proc, struct vmspace and struct vnode.  This saves a significant
	amount of kva space and physical memory.  Additionally, this enables
	TSM for the zone managed memory.
7)	Keep ioopt disabled for now.
8)	Remove the now bogus "single use" map concept.
9)	Use generation counts or id's for data structures residing in TSM, where
	it allows us to avoid unneeded restart overhead during traversals, where
	blocking might occur.
10)	Account better for memory deficits, so the pageout daemon will be able
	to make enough memory available (experimental.)
11)	Fix some vnode locking problems. (From Tor, I think.)
12)	Add a check in ufs_lookup, to avoid lots of unneeded calls to bcmp.
	(experimental.)
13)	Significantly shrink, cleanup, and make slightly faster the vm_fault.c
	code.  Use generation counts, get rid of unneded collpase operations,
	and clean up the cluster code.
14)	Make vm_zone more suitable for TSM.

This commit is partially as a result of discussions and contributions from
other people, including DG, Tor Egge, PHK, and probably others that I
have forgotten to attribute (so let me know, if I forgot.)

This is not the infamous, final cleanup of the vnode stuff, but a necessary
step.  Vnode mgmt should be correct, but things might still change, and
there is still some missing stuff (like ioopt, and physical backing of
non-merged cache files, debugging of layering concepts.)
1998-01-22 17:30:44 +00:00
KATO Takenori
bda1412586 Delete unused code in union_fsync(). 1998-01-22 02:14:59 +00:00
KATO Takenori
3ae6029808 - Move SETKLOC and CLEARKLOCK macros into uion.h.
- Set UN_ULOCK in union_lock() when UN_KLOCK is set.  Caller expects
  that vnode is locked correctly, and may call another function which
  expects locked vnode and may unlock the vnode.
- Do not assume the behavior of inside functions in FreeBSD's
  vfs_suber.c is same as 4.4BSD-Lite2.  Vnode may be locked in
  vget() even though flag is zero.  (Locked vnode is, of course,
  unlocked before returning from vget.)
1998-01-20 10:02:54 +00:00
KATO Takenori
471f80601f Workarround for locking violation while recycling vnode which union fs
used in freelist.
1998-01-18 08:17:48 +00:00
KATO Takenori
afc2a5581f Improve and revise fixes for locking violation.
Obtained from:	NetBSD/pc98
1998-01-18 07:56:41 +00:00
John Dyson
95e5e988e0 Make our v_usecount vnode reference count work identically to the
original BSD code.  The association between the vnode and the vm_object
no longer includes reference counts.  The major difference is that
vm_object's are no longer freed gratuitiously from the vnode, and so
once an object is created for the vnode, it will last as long as the
vnode does.

When a vnode object reference count is incremented, then the underlying
vnode reference count is incremented also.  The two "objects" are now
more intimately related, and so the interactions are now much less
complex.

When vnodes are now normally placed onto the free queue with an object still
attached.  The rundown of the object happens at vnode rundown time, and
happens with exactly the same filesystem semantics of the original VFS
code.  There is absolutely no need for vnode_pager_uncache and other
travesties like that anymore.

A side-effect of these changes is that SMP locking should be much simpler,
the I/O copyin/copyout optimizations work, NFS should be more ponderable,
and further work on layered filesystems should be less frustrating, because
of the totally coherent management of the vnode objects and vnodes.

Please be careful with your system while running this code, but I would
greatly appreciate feedback as soon a reasonably possible.
1998-01-06 05:26:17 +00:00
Sean Eric Fagan
dd30ff81d9 Use CHECKIO in procfs_ioctl() to ensure that any changes in UID/GID result
in the expected failure.
1998-01-06 01:37:12 +00:00
Bruce Evans
cf6347f79b Fixed missing initialization of mp->mnt_stat. At least vm depends on
at least mp->mnt_stat.f_iosize being nonzero.

PR:		5212
1998-01-01 08:28:26 +00:00
Bruce Evans
a954e88d0b Fixed a missing/misplaced/misstyled prototype. 1997-12-30 08:46:44 +00:00
John Dyson
2be70f79f6 Lots of improvements, including restructring the caching and management
of vnodes and objects.  There are some metadata performance improvements
that come along with this.  There are also a few prototypes added when
the need is noticed.  Changes include:

1) Cleaning up vref, vget.
2) Removal of the object cache.
3) Nuke vnode_pager_uncache and friends, because they aren't needed anymore.
4) Correct some missing LK_RETRY's in vn_lock.
5) Correct the page range in the code for msync.

Be gentle, and please give me feedback asap.
1997-12-29 00:25:11 +00:00
Bruce Evans
675ea6f083 Unspammed nested include of <vm/vm_zone.h>. 1997-12-27 02:56:39 +00:00
Joerg Wunsch
7301b27b15 Properly clean out the SI_MOUNTEDON flag iff the mount attempt fails
half the way down.  Otherwise, further attempts to mount the device
will be rejected with BUSY.

IMHO, this flag can completely go away for cd9660.  There's no reason
you need to prevent CDs from being mounted multiple times, and in case
of multisession CDs it can even make sense to mount two different
sessions by the same time (to different mount points, otherwise it
would be pointless ;).
1997-12-21 21:40:02 +00:00
Sean Eric Fagan
d5f81602a7 Clear the p_stops field on change of user/group id, unless the correct
flag is set in the p_pfsflags field.  This, essentially, prevents an SUID
proram from hanging after being traced.  (E.g., "truss /usr/bin/rlogin" would
fail, but leave rlogin in a stopevent state.)  Yet another case where procctl
is (hopefully ;)) no longer needed in the general case.

Reviewed by:	bde (thanks bruce :))
1997-12-20 03:05:47 +00:00
Bruce Evans
b3a66dd356 Set the sender's low watermark to match the maximum size for atomic
writes that we advertise (PIPE_BUF = 512).
1997-12-19 18:58:14 +00:00
Garrett Wollman
1cbbd625cc Add support for poll(2) on files. vop_nopoll() now returns POLLNVAL
if one of the new poll types is requested; hopefully this will not break
any existing code.  (This is done so that programs have a dependable
way of determining whether a filesystem supports the extended poll types
or not.)

The new poll types added are:

	POLLWRITE - file contents may have been modified
	POLLNLINK - file was linked, unlinked, or renamed
	POLLATTRIB - file's attributes may have been changed
	POLLEXTEND - file was extended

Note that the internal operation of poll() means that it is impossible
for two processes to reliably poll for the same event (this could
be fixed but may not be worth it), so it is not possible to rewrite
`tail -f' to use poll at this time.
1997-12-15 03:09:59 +00:00
Bruce Evans
80987b7a3b Fixed EOF handing.
1. SS_CANTRCVMORE was initially set on the wrong socket, so reads
when there has never been a writer on the socket did not return 0.
Note that such reads are only possible if the fifo was opened in
(O_RDONLY | O_NONBLOCK) mode.

2. SS_CANTSENDMORE was initially set on the wrong socket, but this
was harmless because the wrong socket is never sent from and there
is no need to set the flag initially on the right socket (since open
in (O_WRONLY | O_NONBLOCK) mode fails if there is no reader...).

3. SS_CANTRCVMORE was cleared when read() returns.  This broke the
case where read() returns 0 - subsequent reads are supposed to
return 0 until a writer appears.  There is no need to clear the
flag when read() returns, since it is cleared correctly when a
writer appears.
1997-12-13 13:49:59 +00:00
Bruce Evans
5fb0d3e0b3 Restored fifo_pathconf() from rev.1.32. vop_stdpathconf() is too
general to be of much use.  Using it here weakened the _PC_MAX_CANON,
_PC_MAX_INPUT and _PC_VDISABLE cases.

fifo_pathconf() is not quite correct either.  _PC_CHOWN_RESTRICTED
and _PC_LINK_MAX should be handled by the host file system.  For
directories, the host file system should let us handle _PC_PIPE_BUF.
1997-12-13 12:58:09 +00:00
Sean Eric Fagan
d7b7dcba41 Change the ioctls for procfs around a bit; in particular, whever possible,
change from

	ioctl(fd, PIOC<foo>, &i);

to

	ioctl(fd, PIOC<foo>, i);

This is going from the _IOW to _IO ioctl macro.  The kernel, procctl, and
truss must be in synch for it all to work (not doing so will get errors about
inappropriate ioctl's, fortunately).  Hopefully I didn't forget anything :).
1997-12-13 03:13:49 +00:00
Sean Eric Fagan
ba9d19e99b Fix a problem with procfs_exit() that resulted in missing some procfs
nodes; this also apparantly caused a panic in some circumstances.
Also, since procfs_exit() is getting rid of the nodes when a process
exits, don't bother checking for the process' existance in procfs_inactive().
1997-12-12 03:33:43 +00:00
Sean Eric Fagan
7486d3658f Code to prevent a panic caused by procfs_exit(). Note that i don't know
what is teh root cause -- but, sometimes, a procfs vnode in pfshead is
apparantly corrupt (or a UFS vnode instead).  Without this patch, I can
get it to panic by doing (in csh)

	while (1)
		ps auxwww
	end

and it will panic when the PID's wrap.  With it, it does not panic.
Yes -- I know that this is NOT the right way to fix it.  But I haven't
been able to get it to panic yet (which confuses me).  I am going to
be looking into the vgone() code now, as that may be a part of it.
1997-12-09 05:03:41 +00:00
Sean Eric Fagan
bfcfe2e1b1 A couple of fixes from bruce: first of all, psignal is a void (stupid
me; unfortunately, also makes it hard ot check for errors); second, I had
managed to forget a change to PIOCSFL (it should be _IOW, not _IOR) I had
in my local copy, and Bruce called me on it.

Submitted by:	bde
1997-12-08 22:09:39 +00:00
Sean Eric Fagan
847e5f5f9a Use at_exit() to invoke procfs_exit() instead of calling it directly.
Note that an unload facility should be used to call rm_at_exit() (if
procfs is being loaded as an LKM and is subsequently removed), but it
was non-obvious how to do this in the VFS framework.

Reviewed by:	Julian Elischer
1997-12-08 01:06:36 +00:00
Sean Eric Fagan
d99616387e Clear the stop events and wakeup the process on teh last close of the
procfs/mem file.  While this doesn't prevent an unkillable process, it
means that a broken truss prorgam won't do it accidently now (well,
there's a small window of opportunity).  Note that this requires the
change to truss I am about to commit.
1997-12-07 04:01:03 +00:00
Sean Eric Fagan
2a024a2b05 Changes to allow event-based process monitoring and control. 1997-12-06 04:11:14 +00:00
Bruce Evans
1cd52ec333 Don't include <sys/lock.h> in headers when only `struct simplelock' is
required.  Fixed everything that depended on the pollution.
1997-12-05 19:55:52 +00:00
Poul-Henning Kamp
80b301c385 Staticize. 1997-11-18 15:07:35 +00:00