Commit Graph

740 Commits

Author SHA1 Message Date
Poul-Henning Kamp
9c83534dd8 Make VOP_BMAP return a struct bufobj for the underlying storage device
instead of a vnode for it.

The vnode_pager does not and should not have any interest in what
the filesystem uses for backend.

(vfs_cluster doesn't use the backing store argument.)
2004-11-15 09:18:27 +00:00
Poul-Henning Kamp
d4cfa2b5e3 Get even closer to not crashing ext2fs 2004-11-06 18:24:33 +00:00
Poul-Henning Kamp
057b5a5e38 Get closer to unbreaking ext2fs 2004-11-06 18:18:58 +00:00
Poul-Henning Kamp
5349c79d75 Properly implement a default version of VOP_GETWRITEMOUNT.
Remove improper access to vop_stdgetwritemount() which should and
will instead rely on the VOP default path.
2004-11-06 11:41:22 +00:00
Poul-Henning Kamp
48b67bb7fd Move EXT2FS to GEOM backing instead of DEVFS.
For details, please see src/sys/ufs/ffs/ffs_vfsops.c 1.250.
2004-10-29 10:42:30 +00:00
Poul-Henning Kamp
f00f5d71c2 Reduce the locking activity by epsilon by checking VNON condition before
releasing the mountlock.
2004-10-28 08:22:11 +00:00
Poul-Henning Kamp
d83b7498a4 Eliminate unnecessary KASSERTs.
Don't use bp->b_vp in VOP_STRATEGY: the vnode is passed in as an argument.
2004-10-27 06:48:21 +00:00
Poul-Henning Kamp
156cb26583 Loose the v_dirty* and v_clean* alias macros.
Check the count field where we just want to know the full/empty state,
rather than using TAILQ_EMPTY() or TAILQ_FIRST().
2004-10-25 09:14:03 +00:00
Poul-Henning Kamp
b792bebeea Move the buffer method vector (buf->b_op) to the bufobj.
Extend it with a strategy method.

Add bufstrategy() which do the usual VOP_SPECSTRATEGY/VOP_STRATEGY
song and dance.

Rename ibwrite to bufwrite().

Move the two NFS buf_ops to more sensible places, add bufstrategy
to them.

Add inlines for bwrite() and bstrategy() which calls through
buf->b_bufobj->b_ops->b_{write,strategy}().

Replace almost all VOP_STRATEGY()/VOP_SPECSTRATEGY() calls with bstrategy().
2004-10-24 20:03:41 +00:00
Poul-Henning Kamp
494eb176e7 Add b_bufobj to struct buf which eventually will eliminate the need for b_vp.
Initialize b_bufobj for all buffers.

Make incore() and gbincore() take a bufobj instead of a vnode.

Make inmem() local to vfs_bio.c

Change a lot of VI_[UN]LOCK(bp->b_vp) to BO_[UN]LOCK(bp->b_bufobj)
also VI_MTX() to BO_MTX(),

Make buf_vlist_add() take a bufobj instead of a vnode.

Eliminate other uses of bp->b_vp where bp->b_bufobj will do.

Various minor polishing: remove "register", turn panic into KASSERT,
use new function declarations, TAILQ_FOREACH_SAFE() etc.
2004-10-22 08:47:20 +00:00
Poul-Henning Kamp
87d451b95e Desupport device nodes on EXT2 filesystems. 2004-09-27 20:38:46 +00:00
Poul-Henning Kamp
961da2716b Give cluster_write() an explicit vnode argument.
In the future a struct buf will not automatically point out a vnode for us.
2004-09-27 19:14:10 +00:00
Poul-Henning Kamp
1affa3adc8 Create simple function init_va_filerev() for initializing a va_filerev
field.

Replace three instances of longhaired initialization va_filerev fields.

Added XXX comment wondering why we don't use random bits instead of
uptime of the system for this purpose.
2004-09-07 09:17:05 +00:00
John-Mark Gurney
ad3b9257c2 Add locking to the kqueue subsystem. This also makes the kqueue subsystem
a more complete subsystem, and removes the knowlege of how things are
implemented from the drivers.  Include locking around filter ops, so a
module like aio will know when not to be unloaded if there are outstanding
knotes using it's filter ops.

Currently, it uses the MTX_DUPOK even though it is not always safe to
aquire duplicate locks.  Witness currently doesn't support the ability
to discover if a dup lock is ok (in some cases).

Reviewed by:	green, rwatson (both earlier versions)
2004-08-15 06:24:42 +00:00
Poul-Henning Kamp
5e8c582ac2 Put a version element in the VFS filesystem configuration structure
and refuse initializing filesystems with a wrong version.  This will
aid maintenance activites on the 5-stable branch.

s/vfs_mount/vfs_omount/

s/vfs_nmount/vfs_mount/

Name our filesystems mount function consistently.

Eliminate the namiedata argument to both vfs_mount and vfs_omount.
It was originally there to save stack space.  A few places abused
it to get hold of some credentials to pass around.  Effectively
it is unused.

Reorganize the root filesystem selection code.
2004-07-30 22:08:52 +00:00
Poul-Henning Kamp
d634f69316 Remove global variable rootdevs and rootvp, they are unused as such.
Add local rootvp variables as needed.

Remove checks for miniroot's in the swappartition.  We never did that
and most of the filesystems could never be used for that, but it had
still been copy&pasted all over the place.
2004-07-28 20:21:04 +00:00
Colin Percival
56f21b9d74 Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is
somewhat clearer, but more importantly allows for a consistent naming
scheme for suser_cred flags.

The old name is still defined, but will be removed in a few days (unless I
hear any complaints...)

Discussed with:	rwatson, scottl
Requested by:	jhb
2004-07-26 07:24:04 +00:00
Alfred Perlstein
f257b7a54b Make VFS_ROOT() and vflush() take a thread argument.
This is to allow filesystems to decide based on the passed thread
which vnode to return.
Several filesystems used curthread, they now use the passed thread.
2004-07-12 08:14:09 +00:00
Marcel Moolenaar
6d408d58d0 Update for the KDB framework:
o  Make debugging code conditional upon KDB instead of DDB.
2004-07-10 21:21:55 +00:00
Poul-Henning Kamp
e3c5a7a4dd When we traverse the vnodes on a mountpoint we need to look out for
our cached 'next vnode' being removed from this mountpoint.  If we
find that it was recycled, we restart our traversal from the start
of the list.

Code to do that is in all local disk filesystems (and a few other
places) and looks roughly like this:

		MNT_ILOCK(mp);
	loop:
		for (vp = TAILQ_FIRST(&mp...);
		    (vp = nvp) != NULL;
		    nvp = TAILQ_NEXT(vp,...)) {
			if (vp->v_mount != mp)
				goto loop;
			MNT_IUNLOCK(mp);
			...
			MNT_ILOCK(mp);
		}
		MNT_IUNLOCK(mp);

The code which takes vnodes off a mountpoint looks like this:

	MNT_ILOCK(vp->v_mount);
	...
	TAILQ_REMOVE(&vp->v_mount->mnt_nvnodelist, vp, v_nmntvnodes);
	...
	MNT_IUNLOCK(vp->v_mount);
	...
	vp->v_mount = something;

(Take a moment and try to spot the locking error before you read on.)

On a SMP system, one CPU could have removed nvp from our mountlist
but not yet gotten to assign a new value to vp->v_mount while another
CPU simultaneously get to the top of the traversal loop where it
finds that (vp->v_mount != mp) is not true despite the fact that
the vnode has indeed been removed from our mountpoint.

Fix:

Introduce the macro MNT_VNODE_FOREACH() to traverse the list of
vnodes on a mountpoint while taking into account that vnodes may
be removed from the list as we go.  This saves approx 65 lines of
duplicated code.

Split the insmntque() which potentially moves a vnode from one mount
point to another into delmntque() and insmntque() which does just
what the names say.

Fix delmntque() to set vp->v_mount to NULL while holding the
mountpoint lock.
2004-07-04 08:52:35 +00:00
Bruce Evans
82d8695afb Fixed misformatting of code and breaking of a comment in previous commit. 2004-06-20 03:36:31 +00:00
Bruce Evans
addc95fee3 Fixed misformatting in previous commit. 2004-06-20 03:34:21 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Poul-Henning Kamp
4d453ef101 Properly vector all bwrite() and BUF_WRITE() calls through the same path
and s/BUF_WRITE()/bwrite()/ since it now does the same as bwrite().
2004-03-11 18:02:36 +00:00
Poul-Henning Kamp
2b348f7429 Remove unused mnt_reservedvnlist field. 2004-03-11 16:59:57 +00:00
Poul-Henning Kamp
651b11eaf2 Remove unused second arg to vfinddev().
Don't call addaliasu() on VBLK nodes.
2004-03-11 16:33:11 +00:00
Tim J. Robbins
3722550aa6 Enforce the file size limit in VOP_WRITE() as well as VOP_TRUNCATE();
pointed out by bde.
2004-02-19 09:06:06 +00:00
Tim J. Robbins
ba122e68e0 Add partial support for large (>4GB) files on ext2 filesystems. This
support is partial in that it will refuse to create large files on
filesystems that haven't been upgraded to EXT2_DYN_REV or that don't
have the EXT2_FEATURE_RO_COMPAT_LARGE_FILE flag set in the superblock.

MFC after:	2 weeks
2004-02-18 14:08:25 +00:00
Bruce Evans
053791db10 Fixed misspellings of "ext2_*" as "ufs_*" and " "ext2fs_*", and of
"independent" as "dependent" Fixed some other relatively minor wording
and formatting errors.
2004-02-15 08:19:42 +00:00
Bruce Evans
175aef1cdb Removed support for the unsupported option READONLY. It just forced
dishonoring of requests for read-write mounts.
2004-02-15 07:15:58 +00:00
Bruce Evans
2211aa126a MFffs (ffs_vfsops.c 1.76 (part of the big soft updates commit): lock
the vnode around calls to vinvalbuf()).  Apparently no one has tested
ext2fs with DEBUG_VOP_LOCKS.  Vnode locking for vinvalbuf() might not
be required in non-soft-updates cases, but it is now asserted.

MFffs (uncommitted related and nearby cleanups: don't unlock the vnode
after vinvalbuf() only to have to relock it almost immediately; don't
refer to devices classified by vn_isdisk() as block devices).
2004-02-13 20:23:16 +00:00
Bruce Evans
e7a4845084 Fixed longstanding brokenness of inode updates. The waitfor flag was
dishonored in rev.1.1 by commenting out the code that honored it.  This
gave the worst disadvantages of async mounts in an uncontrollable way.

Honoring the flag costs about 50% in real time in worst cases on a new
but not very fast ATA drive with write caching (probably more on drives
without write caching).  The old misbehavior can be recovered using
async mounts after implementing them in mount_ext2fs(8) (just put the
MNT_ASYNC flag in mount_ext2fs's table of supported options like it
is in mount's table).
2004-02-13 17:49:03 +00:00
Bruce Evans
67406320ff MFffs (ffs_vfsops.c 1.227: clean up open mode bandaid). This reduces
gratuitous differences with ffs a little.
2004-02-12 17:54:58 +00:00
John Baldwin
91d5354a2c Locking for the per-process resource limits structure.
- struct plimit includes a mutex to protect a reference count.  The plimit
  structure is treated similarly to struct ucred in that is is always copy
  on write, so having a reference to a structure is sufficient to read from
  it without needing a further lock.
- The proc lock protects the p_limit pointer and must be held while reading
  limits from a process to keep the limit structure from changing out from
  under you while reading from it.
- Various global limits that are ints are not protected by a lock since
  int writes are atomic on all the archs we support and thus a lock
  wouldn't buy us anything.
- All accesses to individual resource limits from a process are abstracted
  behind a simple lim_rlimit(), lim_max(), and lim_cur() API that return
  either an rlimit, or the current or max individual limit of the specified
  resource from a process.
- dosetrlimit() was renamed to kern_setrlimit() to match existing style of
  other similar syscall helper functions.
- The alpha OSF/1 compat layer no longer calls getrlimit() and setrlimit()
  (it didn't used the stackgap when it should have) but uses lim_rlimit()
  and kern_setrlimit() instead.
- The svr4 compat no longer uses the stackgap for resource limits calls,
  but uses lim_rlimit() and kern_setrlimit() instead.
- The ibcs2 compat no longer uses the stackgap for resource limits.  It
  also no longer uses the stackgap for accessing sysctl's for the
  ibcs2_sysconf() syscall but uses kernel_sysctl() instead.  As a result,
  ibcs2_sysconf() no longer needs Giant.
- The p_rlimit macro no longer exists.

Submitted by:	mtm (mostly, I only did a few cleanups and catchups)
Tested on:	i386
Compiled on:	alpha, amd64
2004-02-04 21:52:57 +00:00
Tim J. Robbins
3215f33192 Copy workaround from FFS: open device for write access even if
the user requests a read-only mount. This is necessary because we
don't do the VOP_OPEN again if they upgrade a read-only mount to
read-write.

Noticed by:	bde
2004-01-24 08:43:06 +00:00
Alexander Kabaev
6bd39fe978 Spell magic '16' number as IO_SEQSHIFT. 2004-01-19 20:03:43 +00:00
David E. O'Brien
076fcd1776 This commit was generated by cvs2svn to compensate for changes in r124361,
which included commits to RCS files with non-trunk default branches.
2004-01-11 03:34:02 +00:00
David E. O'Brien
fbee6927b8 Vendor import emu10k1.h from version 1.0.1 of the ALSA driver.
ftp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.1.tar.bz2
  or http://www.alsa-project.org/alsa/cvs/alsa-kernel/include/emu10k1.h
2004-01-11 03:34:02 +00:00
David E. O'Brien
2511c244ad Sync with Creative's 8010.h rev 1.51. 2004-01-09 06:38:11 +00:00
David E. O'Brien
a554deb2a8 Dike out some very Linux-specific parts that we can't compile with.
Also protect AC97_MUTE which is also defined in our own ac97.h.
2004-01-09 05:08:32 +00:00
David E. O'Brien
fca6c85647 Vendor import revision 1.9 of ac97_codec.h (we renamed the file) from
http://cvs.sourceforge.net/viewcvs.py/emu10k1/emu10k1/ac97_codec.h
2004-01-09 05:05:04 +00:00
David E. O'Brien
03adcebca3 This commit was generated by cvs2svn to compensate for changes in r124273,
which included commits to RCS files with non-trunk default branches.
2004-01-09 05:05:04 +00:00
Bruce Evans
6e347ed298 Fixed a reference to a nonexistent variable in previous commit. Renaming
of ffs_reload()'s mountp parameter to mp in rev.1.28 of ffs_vnops.c
had not been merged here.

ext2fs_reload() is still missing locking from not merging other changes
to ffs_reload(), but none of these is related to recent locking changes.
2003-11-05 11:56:58 +00:00
Alexander Kabaev
ca430f2e92 Remove mntvnode_mtx and replace it with per-mountpoint mutex.
Introduce two new macros MNT_ILOCK(mp)/MNT_IUNLOCK(mp) to
operate on this mutex transparently.

Eventually new mutex will be protecting more fields in
struct mount, not only vnode list.

Discussed with: jeff
2003-11-05 04:30:08 +00:00
Marcel Moolenaar
63e69c75fb Remove alpha-bitops.h now that it's unused. It's in the attic if
we want it again.
2003-11-03 07:10:53 +00:00
Alexander Kabaev
45d45c6cde Use VOP_UNLOCK/vrele instead of vput. td was erecived as a parameter
and one cannot be sure it is equal to curthread.
2003-11-03 04:46:19 +00:00
Alexander Kabaev
cb9ddc80ae Take care not to call vput if thread used in corresponding vget
wasn't curthread, i.e. when we receive a thread pointer to use
as a function argument. Use VOP_UNLOCK/vrele in these cases.

The only case there td != curthread known at the moment is
boot() calling sync with thread0 pointer.

This fixes the panic on shutdown people have reported.
2003-11-02 04:52:53 +00:00
Alexander Kabaev
492c1e68fb Temporarily undo parts of the stuct mount locking commit by jeff.
It is unsafe to hold a mutex across vput/vrele calls.

This will be redone when a better locking strategy is agreed upon.

Discussed with: jeff
2003-11-01 05:51:54 +00:00
Marcel Moolenaar
3c6441a736 Fix the alpha tinderbox. The alpha specific bitops used by the bitmap
code has the typical branch prediction detour, which creates cross-
section branches. A LINT kernel is apparently large enough nowadays
that the .text and .text2 sections cannot always be layed-out so that
branches between them reach.
The fix is to stop using the alpha-specific bitops and instead use
the portable implementation used by all platforms other than alpha
and i386.
2003-10-29 07:35:53 +00:00
Poul-Henning Kamp
2c18019f14 DuH!
bp->b_iooffset (the spot on the disk), not bp->b_offset (the offset in
the file)
2003-10-18 14:10:28 +00:00
Poul-Henning Kamp
60efe2c932 Initialize bp->b_offset before calling VOP_[SPEC]STRATEGY() 2003-10-18 11:08:04 +00:00
Jeff Roberson
6acdfd69be - File systems that wish to inspect the vnode contents or their private
v_data field before calling vget/vn_lock must check VI_XLOCK manually to
   be sure that v_data is still valid.  Implement this check in two places
   here.
2003-10-05 06:43:03 +00:00
Jeff Roberson
fcde834c1f - Don't cache_purge() in ext2_reclaim. vclean() does it for us so
this is redundant.
2003-10-05 02:44:22 +00:00
Jeff Roberson
80cd3a0804 - Don't use vrecycle() call vgonel() directly after grabing the vnode
interlock.  We do this so that we still hold the interlock when we lock
   the vnode later.  This prevents races with the mnt vnode list.
2003-10-04 16:09:40 +00:00
Jeff Roberson
7637e5854b - Clean-up comments that refer to the use of B_LOCKED. 2003-08-28 00:56:39 +00:00
Jeff Roberson
7abc12de03 - In LCK_BUF() simply change the owner of the buf to the kernel.
- In ULCK_BUF we no longer need to acquire the lock, just write the buf out.
 - The combination of these changes eliminates one more use of B_LOCKED which
   is in the way of making the buffer cache SMP safe.  In the long term
   ext2fs should probably not try to optimize the use of their metadata bufs
   with a private cache.  This will starve the rest of the system for buffers
   in the extreme case.

Discussed with:	bde (A long time ago..)
Tested on:	md disk/x86
2003-08-28 00:52:23 +00:00
Marcel Moolenaar
cc56683de7 Change of plans: Add ext2_bitops.h with generic and portable
implementations. Use those on platforms that don't have MD
headers. Remove the ia64 MD header. We're going to use the C
implementation there.

Suggested by: bde
2003-08-25 01:39:47 +00:00
Marcel Moolenaar
fcf18c7375 Add compilation support for extfs on ia64, primarily to support LINT.
The functions in ia64-bitops.h merely call panic() for now. They need
to be implemented some day, just not today.
2003-08-23 03:58:11 +00:00
Poul-Henning Kamp
a8d43c90af Add a "int fd" argument to VOP_OPEN() which in the future will
contain the filedescriptor number on opens from userland.

The index is used rather than a "struct file *" since it conveys a bit
more information, which may be useful to in particular fdescfs and /dev/fd/*

For now pass -1 all over the place.
2003-07-26 07:32:23 +00:00
Peter Wemm
a35b33869d Initiate de-orbit burn for fpu-less operation. 386+387 is still
theoretically supportable, but you'd really be happier with FreeBSD 2.1.8
on it.
2003-07-22 08:11:17 +00:00
Poul-Henning Kamp
cefb5754dd Add the same KASSERT to all VOP_STRATEGY and VOP_SPECSTRATEGY implementations
to check that the buffer points to the correct vnode.
2003-06-15 18:53:00 +00:00
Poul-Henning Kamp
7652131bee Initialize struct vfsops C99-sparsely.
Submitted by:   hmp
Reviewed by:	phk
2003-06-12 20:48:38 +00:00
David E. O'Brien
dfbebb8f61 Vendor import emu10k1.h from version 0.9.4 of the ALSA driver (which
includes some needed Audigy support).  This can be found at
ftp://ftp.alsa-project.org/pub/driver/alsa-driver-0.9.4.tar.bz2
and http://www.alsa-project.org/alsa/cvs/alsa-kernel/include/emu10k1.h
2003-06-07 20:54:30 +00:00
David E. O'Brien
1021f44ab9 This commit was generated by cvs2svn to compensate for changes in r115990,
which included commits to RCS files with non-trunk default branches.
2003-06-07 20:54:30 +00:00
Poul-Henning Kamp
5eed219cef Remove extra ';'
Found by:       FlexeLint
2003-05-31 18:52:38 +00:00
David E. O'Brien
318444e86f Vendor import revision 1.8 of ac97_codec.h (we renamed the file) from
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/emu10k1/emu10k1/ac97_codec.h
2003-04-21 02:27:52 +00:00
David E. O'Brien
915dbb90f2 This commit was generated by cvs2svn to compensate for changes in r113778,
which included commits to RCS files with non-trunk default branches.
2003-04-21 02:27:52 +00:00
David E. O'Brien
b18e94c0ba Vendor import revision 1.51 of 8010.h (we renamed the file) from
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/emu10k1/emu10k1/8010.h.
This includes some Audigy support.
2003-04-18 04:17:08 +00:00
David E. O'Brien
aca6bb0d8c Sync with Creative's 8010.h rev 1.39. 2003-04-18 04:13:38 +00:00
David E. O'Brien
11e9b2d70a Vendor import revision 1.39 of 8010.h (we renamed the file) from
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/emu10k1/emu10k1/8010.h.
Rev 1.39 best matches our rev 1.3.
2003-04-18 03:57:22 +00:00
John Baldwin
8804bf6b03 Use local struct proc variables to reduce repeated td->td_proc dereferences
and improve readability.
2003-04-17 22:02:47 +00:00
Jeff Roberson
f5f0dee483 - Lock the buf before clearing flags. 2003-03-13 07:07:16 +00:00
Jeff Roberson
7261f5f68e - Add a new 'flags' parameter to getblk().
- Define one flag GB_LOCK_NOWAIT that tells getblk() to pass the LK_NOWAIT
   flag to the initial BUF_LOCK().  This will eventually be used in cases
   were we want to use a buffer only if it is not currently in use.
 - Convert all consumers of the getblk() api to use this extra parameter.

Reviwed by:	arch
Not objected to by:	mckusick
2003-03-04 00:04:44 +00:00
Nate Lawson
99648386d3 Finish cleanup of vprint() which was begun with changing v_tag to a string.
Remove extraneous uses of vop_null, instead defering to the default op.
Rename vnode type "vfs" to the more descriptive "syncer".
Fix formatting for various filesystems that use vop_print.
2003-03-03 19:15:40 +00:00
Dag-Erling Smørgrav
8994a245e0 Clean up whitespace, s/register //, refrain from strong urge to ANSIfy. 2003-03-02 15:56:49 +00:00
Dag-Erling Smørgrav
c952458814 uiomove-related caddr_t -> void * (just the low-hanging fruit) 2003-03-02 15:50:23 +00:00
Jeff Roberson
17661e5ac4 - Add an interlock argument to BUF_LOCK and BUF_TIMELOCK.
- Remove the buftimelock mutex and acquire the buf's interlock to protect
   these fields instead.
 - Hold the vnode interlock while locking bufs on the clean/dirty queues.
   This reduces some cases from one BUF_LOCK with a LK_NOWAIT and another
   BUF_LOCK with a LK_TIMEFAIL to a single lock.

Reviewed by:	arch, mckusick
2003-02-25 03:37:48 +00:00
David E. O'Brien
71655cc2c9 This commit was generated by cvs2svn to compensate for changes in r111368,
which included commits to RCS files with non-trunk default branches.
2003-02-23 21:58:31 +00:00
David E. O'Brien
e242322ffe Import Linux's linux/include/asm-sparc64/bitopts.h.
This is taken from the 2.4.3 Linux sources as shipped on Red Hat 7.1 Alpha.
2003-02-23 21:58:31 +00:00
David E. O'Brien
068bd9b1d9 Import Linux's linux/include/asm-sparc64/bitopts.h.
This is taken from the 2.4.3 Linux sources as shipped on Red Hat 7.1 Alpha.
2003-02-23 21:58:31 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Jeff Roberson
c10a177610 - Use the new vop_stdfsync instead of recreating our own. 2003-02-09 12:28:51 +00:00
Poul-Henning Kamp
a439334437 Use VOP_SPECSTRATEGY() instead of VOP_STRATEGY(). 2003-01-28 21:46:21 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Poul-Henning Kamp
c6e3ae999b Since Jeffr made the std* functions the default in rev 1.63 of
kern/vfs_defaults.c it is wrong for the individual filesystems to use
the std* functions as that prevents override of the default.

Found by:       src/tools/tools/vop_table
2003-01-04 08:47:19 +00:00
Poul-Henning Kamp
862702306b Convert calls to BUF_STRATEGY to VOP_STRATEGY calls. This is a no-op since
all BUF_STRATEGY did in the first place was call VOP_STRATEGY.
2003-01-03 06:32:15 +00:00
Jens Schweikhardt
9d5abbddbf Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.
2003-01-01 18:49:04 +00:00
Jens Schweikhardt
d64ada501a Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/
Add FreeBSD Id tag where missing.
2002-12-30 21:18:15 +00:00
Bruce Evans
eb5b0bc42e MFufs 1.33:
In the 'found' case for ext2_lookup() the underlying bp's data was
    being accessed after the bp had been releaed.  A simple move of the
    brelse() solves the problem.

The PR reports that this caused panics running the GDB testsuite unless
NO_GEOM is configured.

PR:		44060
Reported by:	Mark Kettenis <kettenis@chello.nl>
MFC after:	3 days
2002-10-18 21:41:41 +00:00
Poul-Henning Kamp
3899c8a38f Be consistent about functions being static.
Fix misindentation.

Spotted by:	DARPA & NAI Labs.
2002-10-16 10:14:34 +00:00
Kirk McKusick
a5b65058d5 Regularize the vop_stdlock'ing protocol across all the filesystems
that use it. Specifically, vop_stdlock uses the lock pointed to by
vp->v_vnlock. By default, getnewvnode sets up vp->v_vnlock to
reference vp->v_lock. Filesystems that wish to use the default
do not need to allocate a lock at the front of their node structure
(as some still did) or do a lockinit. They can simply start using
vn_lock/VOP_UNLOCK. Filesystems that wish to manage their own locks,
but still use the vop_stdlock functions (such as nullfs) can simply
replace vp->v_vnlock with a pointer to the lock that they wish to
have used for the vnode. Such filesystems are responsible for
setting the vp->v_vnlock back to the default in their vop_reclaim
routine (e.g., vp->v_vnlock = &vp->v_lock).

In theory, this set of changes cleans up the existing filesystem
lock interface and should have no function change to the existing
locking scheme.

Sponsored by:	DARPA & NAI Labs.
2002-10-14 03:20:36 +00:00
Jeff Roberson
431886406c - Lock access to the buf lists.
- Use vrefcnt() where appropriate.
2002-09-25 02:34:56 +00:00
Don Lewis
fa288043e2 VOP_FSYNC() requires that it's vnode argument be locked, which nfs_link()
wasn't doing.  Rather than just lock and unlock the vnode around the call
to VOP_FSYNC(), implement rwatson's suggestion to lock the file vnode
in kern_link() before calling VOP_LINK(), since the other filesystems
also locked the file vnode right away in their link methods.  Remove the
locking and and unlocking from the leaf filesystem link methods.

Reviewed by:	rwatson, bde  (except for the unionfs_link() changes)
2002-09-19 13:32:45 +00:00
Nate Lawson
86ed6d45ac Remove any VOP_PRINT that redundantly prints the tag.
Move lockmgr_printinfo() into vprint() for everyone's benefit.

Suggested by: bde
2002-09-18 20:42:04 +00:00
Nate Lawson
06be2aaa83 Remove all use of vnode->v_tag, replacing with appropriate substitutes.
v_tag is now const char * and should only be used for debugging.

Additionally:
1. All users of VT_NTS now check vfsconf->vf_type VFCF_NETWORK
2. The user of VT_PROCFS now checks for the new flag VV_PROCDEP, which
is propagated by pseudofs to all child vnodes if the fs sets PFS_PROCDEP.

Suggested by:   phk
Reviewed by:    bde, rwatson (earlier version)
2002-09-14 09:02:28 +00:00
Bruce Evans
d3a7b5e70e vfs_syscalls.c:
Changed rename(2) to follow the letter of the POSIX spec.  POSIX
requires rename() to have no effect if its args "resolve to the same
existing file".  I think "file" can only reasonably be read as referring
to the inode, although the rationale and "resolve" seem to say that
sameness is at the level of (resolved) directory entries.

ext2fs_vnops.c, ufs_vnops.c:
Replaced code that gave the historical BSD behaviour of removing one
link name by checks that this code is now unreachable.  This fixes
some races.  All vnodes needed to be unlocked for the removal, and
locking at another level using something like IN_RENAME was not even
attempted, so it was possible for rename(x, y) to return with both x
and y removed even without any unlink(2) syscalls (one process can
remove x using rename(x, y) and another process can remove y using
rename(y, x)).

Prodded by:	alfred
MFC after:	8 weeks
PR:		42617
2002-09-10 11:09:13 +00:00
Robert Watson
9ca435893b In order to better support flexible and extensible access control,
make a series of modifications to the credential arguments relating
to file read and write operations to cliarfy which credential is
used for what:

- Change fo_read() and fo_write() to accept "active_cred" instead of
  "cred", and change the semantics of consumers of fo_read() and
  fo_write() to pass the active credential of the thread requesting
  an operation rather than the cached file cred.  The cached file
  cred is still available in fo_read() and fo_write() consumers
  via fp->f_cred.  These changes largely in sys_generic.c.

For each implementation of fo_read() and fo_write(), update cred
usage to reflect this change and maintain current semantics:

- badfo_readwrite() unchanged
- kqueue_read/write() unchanged
  pipe_read/write() now authorize MAC using active_cred rather
  than td->td_ucred
- soo_read/write() unchanged
- vn_read/write() now authorize MAC using active_cred but
  VOP_READ/WRITE() with fp->f_cred

Modify vn_rdwr() to accept two credential arguments instead of a
single credential: active_cred and file_cred.  Use active_cred
for MAC authorization, and select a credential for use in
VOP_READ/WRITE() based on whether file_cred is NULL or not.  If
file_cred is provided, authorize the VOP using that cred,
otherwise the active credential, matching current semantics.

Modify current vn_rdwr() consumers to pass a file_cred if used
in the context of a struct file, and to always pass active_cred.
When vn_rdwr() is used without a file_cred, pass NOCRED.

These changes should maintain current semantics for read/write,
but avoid a redundant passing of fp->f_cred, as well as making
it more clear what the origin of each credential is in file
descriptor read/write operations.

Follow-up commits will make similar changes to other file descriptor
operations, and modify the MAC framework to pass both credentials
to MAC policy modules so they can implement either semantic for
revocation.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-15 20:55:08 +00:00
Robert Watson
c08b677fb5 Pass IO_NOMACCHECK to vn_rdwr() in the following checks to prevent
enforcement of MAC policy on the read or write operations:

- In ext2fs, don't enforce MAC on loop-back reads and writes supporting
  directory read operations in lookup(), directory modifications in
  rename(), directory write operations in mkdir(), symlink write
  operations in symlink().

- In the NFS client locking code, perform vn_rdwr() on the NFS locking
  socket without enforcing MAC, since the write is done on behalf of
  the kernel NFS implementation rather than the user process.

- In UFS, don't enforce MAC on loop-back reads and writes supporting
  directory read operations in lookup(), and symlink write operations
  in symlink().

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-12 16:43:04 +00:00
Jeff Roberson
e6e370a7fe - Replace v_flag with v_iflag and v_vflag
- v_vflag is protected by the vnode lock and is used when synchronization
   with VOP calls is needed.
 - v_iflag is protected by interlock and is used for dealing with vnode
   management issues.  These flags include X/O LOCK, FREE, DOOMED, etc.
 - All accesses to v_iflag and v_vflag have either been locked or marked with
   mp_fixme's.
 - Many ASSERT_VOP_LOCKED calls have been added where the locking was not
   clear.
 - Many functions in vfs_subr.c were restructured to provide for stronger
   locking.

Idea stolen from:	BSD/OS
2002-08-04 10:29:36 +00:00
Ian Dowse
efdc5c8a0f Use hashdestroy() now that it exists. 2002-06-30 03:01:44 +00:00
Peter Wemm
e8aef1d3b5 Use suword16/fuword16 instead of susword/fusword - this has two different
definitions so far.. 16 bit on x86 and appears to be 32 bit on sparc64.
Be explicit to avoid suprises.
2002-06-20 07:23:08 +00:00
Maxime Henrion
ad841cb9b2 Convert ext2fs to nmount(2). 2002-05-24 17:38:01 +00:00
Ian Dowse
6a681d9a3c Add an ext2_uninit() routine that undoes the actions performed by
ext2_init(). This permits the ext2fs module to be unloaded without
causing panics and leaking memory.
2002-05-18 22:18:17 +00:00
Ian Dowse
ca305f613f Fix two off-by-one errors when sanity-checking inode numbers. In
ext2fs, inode numbers start at 1, so the maximum valid inode number
is (s_inodes_per_group * s_groups_count), not one less. This is
just a minimal change to avoid unnecessary panics and errors; some
other related bugs that Bruce Evans mentioned to me are not addressed.

Reviewed by:	bde (ages ago)
2002-05-18 21:33:07 +00:00
Ian Dowse
39e24f84ac Use explicitly-sized types where necessary to make ext2fs work again
after the change to a 64-bit daddr_t.
2002-05-18 19:12:38 +00:00
Ian Dowse
79af20a81c Give ext2fs its own static "dirchk" variable instead of using ufs's
variable. Make this accessible as the sysctl vfs.e2fs.dirchk.
2002-05-16 20:53:04 +00:00
Ian Dowse
13a263882f Remove register keyword. 2002-05-16 19:43:28 +00:00
Ian Dowse
9504abaad7 Complete the separation of ext2fs from ufs by copying the remaining
shared code and converting all ufs references. Originally it may
have made sense to share common features between the two filesystems,
but recently it has only caused problems, the UFS2 work being the
final straw.

All UFS_* indirect calls are now direct calls to ext2_* functions,
and ext2fs-specific mount and inode structures have been introduced.
2002-05-16 19:08:03 +00:00
Ian Dowse
cf6b7c4adc Following a repo-copy from src/sys/ufs/ufs, rename functions and
structures etc. to ext2fs-specific names, and remove ufs-specific
code that is no longer required. As a first stage, the code will
still convert back and forth between the on-disk format and struct
inode, so the struct dinode fields have been added to struct inode
for now.

Note that these files are not yet connected to the build.
2002-05-14 17:14:01 +00:00
Poul-Henning Kamp
98b0c78978 Make daddr_t and u_daddr_t 64bits wide.
Retire daddr64_t and use daddr_t instead.

Sponsored by:	DARPA & NAI Labs.
2002-05-14 11:09:43 +00:00
Bruce Evans
a8fae7e580 Fixed syntax errors (tokens after #endif). 2002-05-13 12:55:30 +00:00
Bruce Evans
a10e4c9532 Fixed syntax errors (garbage after #endif; just editing errors in this
case).  These errors and related style bugs swere cloned from ufs
shortly after they were committed to ufs.  They were mostly fixed in
ufs long ago.
2002-05-13 12:39:46 +00:00
Poul-Henning Kamp
05f4ff5da1 Remove register keyword.
Sponsored by:	DARPA & NAI Labs.
Submitted by:	mckusick
2002-05-13 09:22:31 +00:00
Poul-Henning Kamp
7110af7577 ARGH! SBLOCK is not unused. Try to get this right.
BBSIZE belongs in <sys/disklabel.h> (but shouldn't be a constant).

Define SBLOCK again, using the right math.

Sponsored by: DARPA & NAI Labs.
2002-05-12 20:21:40 +00:00
Poul-Henning Kamp
7cb71b749c Remove #define for BBOFF, it is assumed == 0 so many places that we might
as well forget about it.  In fact the only thing which used it was the
SBOFF macro.

Sponsored by: DARPA & NAI Labs.
2002-05-12 20:00:21 +00:00
Poul-Henning Kamp
16910634dd Remove unused BBLOCK and SBLOCK #defines.
Sponsored by: DARPA & NAI Labs.
2002-05-12 19:56:31 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on:	i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
John Baldwin
44731cab3b Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API.  The entire API now consists of two functions
similar to the pre-KSE API.  The suser() function takes a thread pointer
as its only argument.  The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0.  The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on:	smp@
2002-04-01 21:31:13 +00:00
Bruce Evans
0508986cce In ffs_mountffs(), set mnt_iosize_max to si_iosize_max unconditionally
provided the latter is nonzero.  At this point, the former is a fairly
arbitrary default value (DFTPHYS), so changing it to any reasonable
value specified by the device driver is safe.  Using the maximum of
these limits broke ffs clustered i/o for devices whose si_iosize_max
is < DFLTPHYS.  Using the minimum would break device drivers' ability
to increase the active limit from DFTLPHYS up to MAXPHYS.

Copied the code for this and the associated (unnecessary?) fixup of
mp_iosize_max to all other filesystems that use clustering (ext2fs and
msdosfs).  It was completely missing.

PR:		36309
MFC-after:	1 week
2002-03-30 15:12:57 +00:00
Bruce Evans
f47e870c55 Moved $FreeBSD$ to the correct place. 2002-03-23 13:48:10 +00:00
Bruce Evans
d4ee5a13d3 Repaired CSRG id. This file was not in Lite1; it was just cloned from a
file with a in Lite1 before being cvs-added to FreeBSD.
2002-03-23 13:41:52 +00:00
Bruce Evans
995b73dcc3 Fixed some style bugs in the removal of __P(()). Continuation lines
were not outdented to preserve non-KNF lining up of code with parentheses.
Switch to KNF formatting.
2002-03-23 13:10:13 +00:00
Alfred Perlstein
6f1e855112 Remove __P. 2002-03-19 22:40:48 +00:00
Kirk McKusick
a0595d0249 Add a flags parameter to VFS_VGET to pass through the desired
locking flags when acquiring a vnode. The immediate purpose is
to allow polling lock requests (LK_NOWAIT) needed by soft updates
to avoid deadlock when enlisting other processes to help with
the background cleanup. For the future it will allow the use of
shared locks for read access to vnodes. This change touches a
lot of files as it affects most filesystems within the system.
It has been well tested on FFS, loopback, and CD-ROM filesystems.
only lightly on the others, so if you find a problem there, please
let me (mckusick@mckusick.com) know.
2002-03-17 01:25:47 +00:00
Kirk McKusick
0d2af52141 Introduce the new 64-bit size disk block, daddr64_t. Change
the bio and buffer structures to have daddr64_t bio_pblkno,
b_blkno, and b_lblkno fields which allows access to disks
larger than a Terabyte in size. This change also requires
that the VOP_BMAP vnode operation accept and return daddr64_t
blocks. This delta should not affect system operation in
any way. It merely sets up the necessary interfaces to allow
the development of disk drivers that work with these larger
disk block addresses. It also allows for the development of
UFS2 which will use 64-bit block addresses.
2002-03-15 18:49:47 +00:00
Poul-Henning Kamp
c836b2737b Remove use of the bogus ioctl DIOCGPART.
It was used to initialize an unused variable, because ext2fs was
copy&pasted from UFS rather than copy,paste&cleaned from UFS.

Suggested by:	bde
2002-03-11 10:11:00 +00:00
Bruce Evans
ffb382b4dc Deverbosified previous 2 commits (removed the rotted list of reasons why
<sys/systm.h> is included instead of adding to it).

Approved by:	previous committer
2002-03-02 11:14:13 +00:00
Mark Murray
6df66172e3 Adjust the includes a bit.
Requested by:	bde
2002-02-28 17:41:42 +00:00
Mark Murray
6764eb8e7b Warning fix. (Very basic - add the right include so that rdtsc() gets
a prototype).
2002-02-28 08:37:18 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
David E. O'Brien
6e551fb628 Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.
2001-12-10 08:09:49 +00:00
Giorgos Keramidas
a98556d61f Change constraints to use "+" in inline asm instead of mapping input
to output parameters with "0".

Reviewed by:	jhb
2001-11-12 21:58:27 +00:00
Matthew Dillon
6b8bd2efc1 Add mnt_reservedvnlist so we can MFC to 4.x, in order to make all mount
structure changes now rather then piecemeal later on.  mnt_nvnodelist
currently holds all the vnodes under the mount point.  This will eventually
be split into a 'dirty' and 'clean' list.  This way we only break kld's once
rather then twice.  nvnodelist will eventually turn into the dirty list
and should remain compatible with the klds.
2001-11-04 18:55:42 +00:00
Matthew Dillon
c72ccd014d Change the vnode list under the mount point from a LIST to a TAILQ
in preparation for an implementation of limiting code for kern.maxvnodes.

MFC after:	3 days
2001-10-23 01:21:29 +00:00
Ian Dowse
5d76690a7f The addition of i_dirhash to struct inode pushed RELENG_4's
sizeof(struct inode) into a new malloc bucket on the i386. This
didn't happen in -current due to the removal of i_lock, but it does
no harm to apply the workaround to -current first.

Reduce the size of the i_spare[] array in struct inode from 4 to
3 entries, and change ext2fs to use i_din.di_spare[1] so that it
does not need i_spare[3].

Reviewed by:	bde
MFC after:	3 days
2001-09-24 18:29:20 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Peter Wemm
8771bd7eb0 Do not depend on pcb_savefpu backwards compat #define. 2001-07-12 12:19:11 +00:00
Ian Dowse
9b5ad47fb7 Bring in dirhash, a simple hash-based lookup optimisation for large
directories. When enabled via "options UFS_DIRHASH", in-core hash
arrays are maintained for large directories. These allow all
directory operations to take place quickly instead of requiring
long linear searches. For now anyway, dirhash is not enabled by
default.

The in-core hash arrays have a memory requirement that is approximately
half the size of the size of the on-disk directory file. A number
of new sysctl variables allow control over which directories get
hashed and over the maximum amount of memory that dirhash will use:

  vfs.ufs.dirhash_minsize
    The minimum on-disk directory size for which hashing should be
    used. The default is 2560 (2.5k).

  vfs.ufs.dirhash_maxmem
    The system-wide maximum total memory to be used by dirhash data
    structures. The default is 2097152 (2MB).

The current amount of memory being used by dirhash is visible
through the read-only sysctl variable vfs.ufs.dirhash_maxmem.
Finally, some extra sanity checks that are enabled by default, but
which may have an impact on performance, can be disabled by setting
vfs.ufs.dirhash_docheck to 0.

Discussed on: -fs, -hackers
2001-07-10 21:21:29 +00:00
John Baldwin
ed87274d16 Fix more mntvnode and vnode interlock order reversals. 2001-06-28 22:21:33 +00:00
John Baldwin
797c3dba25 Fix a mntvnode and vnode interlock reversal. 2001-06-28 03:52:04 +00:00
Cameron Grant
10a31b01bf new (gpl licensed) firmware image for cs4280/cs46xx sound chips 2001-05-30 22:28:30 +00:00
Poul-Henning Kamp
c7a3e2379c Remove last vestiges of MFS. 2001-05-29 21:21:53 +00:00
Scott Long
6d45b2bf31 Close the opening comment line on these two files that mysteriouly vanished. 2001-05-27 21:07:39 +00:00
Bruce Evans
03c0300c01 Oops. Unremove vestiges of the old, broken sound drivers. They are now
used in new drivers.
2001-05-24 18:19:00 +00:00
Bruce Evans
dd015692a7 Remove vestiges of the old, broken sound drivers. 2001-05-24 16:52:13 +00:00
Ian Dowse
0864ef1e8a Change the second argument of vflush() to an integer that specifies
the number of references on the filesystem root vnode to be both
expected and released. Many filesystems hold an extra reference on
the filesystem root vnode, which must be accounted for when
determining if the filesystem is busy and then released if it isn't
busy. The old `skipvp' approach required individual filesystem
xxx_unmount functions to re-implement much of vflush()'s logic to
deal with the root vnode.

All 9 filesystems that hold an extra reference on the root vnode
got the logic wrong in the case of forced unmounts, so `umount -f'
would always fail if there were any extra root vnode references.
Fix this issue centrally in vflush(), now that we can.

This commit also fixes a vnode reference leak in devfs, which could
result in idle devfs filesystems that refuse to unmount.

Reviewed by:	phk, bp
2001-05-16 18:04:37 +00:00
Kirk McKusick
9ccb939ef0 When running with soft updates, track the number of blocks and files
that are committed to being freed and reflect these blocks in the
counts returned by statfs (and thus also by the `df' command). This
change allows programs such as those that do news expiration to
know when to stop if they are trying to create a certain percentage
of free space. Note that this change does not solve the much harder
problem of making this to-be-freed space available to applications
that want it (thus on a nearly full filesystem, you may still
encounter out-of-space conditions even though the free space will
show up eventually). Hopefully this harder problem will be the
subject of a future enhancement.
2001-05-08 07:42:20 +00:00
Poul-Henning Kamp
cf94807d03 Remove blatantly pointless call to VOP_BMAP(). 2001-05-01 09:12:05 +00:00
Poul-Henning Kamp
a62615e59b Implement vop_std{get|put}pages() and add them to the default vop[].
Un-copy&paste all the VOP_{GET|PUT}PAGES() functions which do nothing but
the default.
2001-05-01 08:34:45 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by:	bde (with reservations)
2001-05-01 08:13:21 +00:00
Poul-Henning Kamp
855aa097af VOP_BALLOC was never really a VOP in the first place, so convert it
to UFS_BALLOC like the other "between UFS and FFS function interfaces".
2001-04-29 12:36:52 +00:00
Poul-Henning Kamp
bdb8855550 Make a panic less misleading. 2001-04-29 11:45:15 +00:00
Poul-Henning Kamp
954a0e256e Remove two unused arguments from ufs_bmaparray(). 2001-04-29 10:24:58 +00:00
Greg Lehey
60fb0ce365 Revert consequences of changes to mount.h, part 2.
Requested by:	bde
2001-04-29 02:45:39 +00:00
Bruce Evans
e8a28f87d8 MFffs ffs_balloc.c 1.5.
Long ago, bread() set b_blkno to the disk block number as a side effect
of doing physical i/o (or it just retained the setting from when the
i/o was done).  The setting is lost when buffers go away and then are
reconsituted from VM.  bread() originally compensated by doing a
VOP_BMAP() to recover b_blkno, but this was no good since it sometimes
caused extra i/o or even deadlock for bread()ing metadata to do the
bmap.  This was fixed in vfs_bio.c 1.33 (1995/03/03) and ffs_balloc.c
1.5, etc., by removing the VOP_BMAP() from bread() and breadn(), and
changing all (?) places that used b_blkno to set it if necessary.

ext2fs was not imported until later in 1995 and was still depending on
the old behaviour of bread() in at least ext2_balloc().  This caused
filesystem and file corruption by clobbering direct block numbers in
inodes.
2001-04-25 10:33:09 +00:00
Poul-Henning Kamp
a13234bb35 Move the netexport structure from the fs-specific mountstructure
to struct mount.

This makes the "struct netexport *" paramter to the vfs_export
and vfs_checkexport interface unneeded.

Consequently that all non-stacking filesystems can use
vfs_stdcheckexp().

At the same time, make it a pointer to a struct netexport
in struct mount, so that we can remove the bogus AF_MAX
and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
Greg Lehey
d98dc34f52 Correct #includes to work with fixed sys/mount.h. 2001-04-23 09:05:15 +00:00
Kirk McKusick
589c7af992 Fixes to track snapshot copy-on-write checking in the specinfo
structure rather than assuming that the device vnode would reside
in the FFS filesystem (which is obviously a broken assumption with
the device filesystem).
2001-03-07 07:09:55 +00:00
John Baldwin
19eb87d22a Grab the process lock while calling psignal and before calling psignal. 2001-03-07 03:37:06 +00:00
Adrian Chadd
f3a90da995 Reviewed by: jlemon
An initial tidyup of the mount() syscall and VFS mount code.

This code replaces the earlier work done by jlemon in an attempt to
make linux_mount() work.

* the guts of the mount work has been moved into vfs_mount().

* move `type', `path' and `flags' from being userland variables into being
  kernel variables in vfs_mount(). `data' remains a pointer into
  userspace.

* Attempt to verify the `type' and `path' strings passed to vfs_mount()
  aren't too long.

* rework mount() and linux_mount() to take the userland parameters
  (besides data, as mentioned) and pass kernel variables to vfs_mount().
  (linux_mount() already did this, I've just tidied it up a little more.)

* remove the copyin*() stuff for `path'. `data' still requires copyin*()
  since its a pointer into userland.

* set `mount->mnt_statf_mntonname' in vfs_mount() rather than in each
  filesystem.  This variable is generally initialised with `path', and
  each filesystem can override it if they want to.

* NOTE: f_mntonname is intiailised with "/" in the case of a root mount.
2001-03-01 21:00:17 +00:00
Jake Burkholder
02318dac2c Remove the leading underscore from all symbols defined in x86 asm
and used in C or vice versa.  The elf compiler uses the same names
for both.  Remove asnames.h with great prejudice; it has served its
purpose.

Note that this does not affect the ability to generate an aout kernel
due to gcc's -mno-underscores option.

moral support from:	peter, jhb
2001-02-25 06:29:04 +00:00
Jeroen Ruigrok van der Werven
7c63796828 Preceed/preceeding are not english words. Use precede or preceding. 2001-02-18 10:25:42 +00:00
Bosko Milekic
9ed346bab0 Change and clean the mutex lock interface.
mtx_enter(lock, type) becomes:

mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)

similarily, for releasing a lock, we now have:

mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.

The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.

Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:

MTX_QUIET and MTX_NOSWITCH

The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:

mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.

Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.

Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.

Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.

Finally, caught up to the interface changes in all sys code.

Contributors: jake, jhb, jasone (in no particular order)
2001-02-09 06:11:45 +00:00
Poul-Henning Kamp
fc2ffbe604 Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)
2001-02-04 13:13:25 +00:00
Poul-Henning Kamp
ef9e85abba Use <sys/queue.h> macro API. 2001-02-04 12:37:48 +00:00
Poul-Henning Kamp
b99cfaf32c Remove a DIAGNOSTIC check which belongs in <sys/queue.h> if anyplace at all. 2001-02-04 11:53:51 +00:00
Scott Long
a5108eaebf Driver for the ESS Maestro3 and Allegro sound chips. Note that due to the
amount of GPL'd firmware in the driver, it will only be built as a module.

Approved by:	cg
2001-02-01 20:29:16 +00:00
John Baldwin
ba88dfc733 Back out proc locking to protect p_ucred for obtaining additional
references along with the actual obtaining of additional references.
2001-01-27 00:01:31 +00:00
Jason Evans
1b367556b5 Convert all simplelocks to mutexes and remove the simplelock implementations. 2001-01-24 12:35:55 +00:00
John Baldwin
c797833a37 Proc locking. 2001-01-23 23:51:56 +00:00
John Baldwin
157403fff0 Proc locking, mostly protecting p_ucred while obtaining additional
references.
2001-01-23 22:41:15 +00:00
Sergey Babkin
bf374e5b67 Completed move of Digiboard drivers to dev/dgb 2001-01-08 02:47:37 +00:00
Sergey Babkin
e3fc8aba7f Changed the copyright notice to BSD-style. The original GPL copyright
was used due to confusion. Now this code should be moved out of the
gnu ghetto subdirectory.
2001-01-05 02:12:02 +00:00
Matthew Dillon
6ddaf0f45e Avoid a data-consistency race between write() and mmap()
by ensuring that newly allocated blocks are zerod.  The
race can occur even in the case where the write covers
the entire block.

Reported by: Sven Berkvens <sven@berkvens.net>, Marc Olzheim <zlo@zlo.nu>
2000-12-17 23:57:05 +00:00
Matt Jacob
80e8f27bbc Put the bits in place for Alpha support for ext2. Not tested. 2000-12-09 22:32:49 +00:00
Matt Jacob
2c8380ba4a Correct to a common %ld the 5 argument to a printf. 2000-12-09 22:32:01 +00:00
Matt Jacob
f5a5fd9ed1 Use a pointer to a size_t for the 4th argument to copyinstr-
not a pointer to a u_int.
2000-12-09 22:31:34 +00:00
Bruce Evans
03b67a395f Backed out previous commit. Don't depend on namespace pollution in
<sys/buf.h>.
2000-12-02 12:03:58 +00:00
Alfred Perlstein
82625cf321 remove unneded sys/ucred.h includes 2000-11-30 18:52:32 +00:00
Bruce Evans
3a715f43c6 Quick fix for not writing group descriptor group, inode bitmaps or
block bitmaps before unmount() completes.  They were written using
bdwrite(), so they were normally written less than 32 seconds after
unmount(), but this is too late if the media is removed or the system
is rebooted soon after unmount().  sync()ing before unmount() didn't
help, because ext2fs uses buggy private caching for these blocks --
it doesn't even bdwrite() them until they are uncached or the filesystem
is unmounted.  sync()ing after unmount() didn't help, because sync()
only applies to (vnodes for) mounted filesystems.

PR:		22726
2000-11-10 14:54:15 +00:00
Bruce Evans
1c1752872f Fixed breakage of mknod() in rev.1.48 of ext2_vnops.c and rev.1.126 of
ufs_vnops.c:

1) i_ino was confused with i_number, so the inode number passed to
   VFS_VGET() was usually wrong (usually 0U).
2) ip was dereferenced after vgone() freed it, so the inode number
   passed to VFS_VGET() was sometimes not even wrong.

Bug (1) was usually fatal in ext2_mknod(), since ext2fs doesn't have
space for inode 0 on the disk; ino_to_fsba() subtracts 1 from the
inode number, so inode number 0U gives a way out of bounds array
index.  Bug(1) was usually harmless in ufs_mknod(); ino_to_fsba()
doesn't subtract 1, and VFS_VGET() reads suitable garbage (all 0's?)
from the disk for the invalid inode number 0U; ufs_mknod() returns
a wrong vnode, but most callers just vput() it; the correct vnode is
eventually obtained by an implicit VFS_VGET() just like it used to be.

Bug (2) usually doesn't happen.
2000-11-04 08:10:56 +00:00
Bruce Evans
e6410301f0 Support filesystems with the not-so-new "sparse_superblocks" feature.
When this feature is enabled, mke2fs doesn't necessarily allocate a
super block and its associated descriptor blocks for every group.
The (non-)allocations are reflected in the block bitmap.  Since the
filesystem code doesn't write to these blocks except for the first
superblock, all it has to do to support them is to not count them in
ext2_statfs() and not attempt to check them at mount time in
ext2_check_blocks_bitmap() (the check has never been enabled in
FreeBSD anyway).
2000-11-03 16:41:48 +00:00
Poul-Henning Kamp
cf9fa8e725 Move suser() and suser_xxx() prototypes and a related #define from
<sys/proc.h> to <sys/systm.h>.

Correctly document the #includes needed in the manpage.

Add one now needed #include of <sys/systm.h>.
Remove the consequent 48 unused #includes of <sys/proc.h>.
2000-10-29 16:06:56 +00:00
Poul-Henning Kamp
9f69a4578a Weaken a bogus dependency on <sys/proc.h> in <sys/buf.h> by #ifdef'ing
the offending inline function (BUF_KERNPROC) on it being #included
already.

I'm not sure BUF_KERNPROC() is even the right thing to do or in the
right place or implemented the right way (inline vs normal function).

Remove consequently unneeded #includes of <sys/proc.h>
2000-10-29 14:54:55 +00:00
Poul-Henning Kamp
53ce36d17a Remove unneeded #include <sys/proc.h> lines. 2000-10-29 13:57:19 +00:00
Poul-Henning Kamp
46aa3347cb Convert all users of fldoff() to offsetof(). fldoff() is bad
because it only takes a struct tag which makes it impossible to
use unions, typedefs etc.

Define __offsetof() in <machine/ansi.h>

Define offsetof() in terms of __offsetof() in <stddef.h> and <sys/types.h>

Remove myriad of local offsetof() definitions.

Remove includes of <stddef.h> in kernel code.

NB: Kernelcode should *never* include from /usr/include !

Make <sys/queue.h> include <machine/ansi.h> to avoid polluting the API.

Deprecate <struct.h> with a warning.  The warning turns into an error on
01-12-2000 and the file gets removed entirely on 01-01-2001.

Paritials reviews by:   various.
Significant brucifications by:  bde
2000-10-27 11:45:49 +00:00
Poul-Henning Kamp
db7e3af111 Remove unneeded #include <machine/clock.h> 2000-10-15 14:19:01 +00:00
Eivind Eklund
7eb9fca557 Blow away the v_specmountpoint define, replacing it with what it was
defined as (rdev->si_mountpoint)
2000-10-09 17:31:39 +00:00
Jason Evans
a18b1f1d4d Convert lockmgr locks from using simple locks to using mutexes.
Add lockdestroy() and appropriate invocations, which corresponds to
lockinit() and must be called to clean up after a lockmgr lock is no
longer needed.
2000-10-04 01:29:17 +00:00
Peter Wemm
2da5dbec3e Put on my nuclear-grade asbestos suit and cvs rm the old, broken, sound
drivers (again).  These drivers have not compiled for 5-6 months.
Now that the new sound code supports MIDI, the major reason we had for
reviving it is gone.  It is a far better investment polishing the new
midi code than trying to keep this on life support.  Come 5.0-REL, if
there are major shortcomings in the pcm sound driver then maybe we can
rethink this, but until then we should focus on pcm.

Remember, these have not been compilable since ~April-May this year.
2000-10-02 03:13:50 +00:00
Boris Popov
e500f61fde ext2fs depends on ufs code, so update it to properly handle v_lock field.
Noticed by:	bde
2000-09-26 01:31:46 +00:00
Boris Popov
67e871664b Add a lock structure to vnode structure. Previously it was either allocated
separately (nfs, cd9660 etc) or keept as a first element of structure
referenced by v_data pointer(ffs). Such organization leads to known problems
with stacked filesystems.

From this point vop_no*lock*() functions maintain only interlock lock.
vop_std*lock*() functions maintain built-in v_lock structure using lockmgr().
vop_sharedlock() is compatible with vop_stdunlock(), but maintains a shared
lock on vnode.

If filesystem wishes to export lockmgr compatible lock, it can put an address
of this lock to v_vnlock field. This indicates that the upper filesystem
can take advantage of it and use single lock structure for entire (or part)
of stack of vnodes. This field shouldn't be examined or modified by VFS code
except for initialization purposes.

Reviewed in general by:	mckusick
2000-09-25 15:24:04 +00:00
Bruce Evans
96cae770d3 Fixed some serious bugs in ext2_readdir():
The cookie buffer was usually overrun by a large amount whenever
cookies were used.  Cookies are used by nfs and the Linuxulator, so
this bug usually caused panics whenever an ext2fs filesystem was nfs
mounted or a Linux utility that calls readdir() was run on an ext2fs
filesystem.

The directory buffer was sometimes overrun by a small amount.  This
sometimes caused panics and wrong results even for FreeBSD utilities,
but it was usually harmless because FreeBSD utilities use a large
enough buffer size (4K).  Linux utilities usually triggered the bug
since they use a too-small buffer size (512 bytes), at least with the
old RedHat utilities that I tested with.

PR:	19407 (this fix is incomplete or for a slightly different bug)
2000-09-12 17:10:39 +00:00
Cameron Grant
90d27234a9 sync CCR register definitions with creative sources 2000-08-06 20:58:11 +00:00
Kirk McKusick
9b97113391 This patch corrects the first round of panics and hangs reported
with the new snapshot code.

Update addaliasu to correctly implement the semantics of the old
checkalias function. When a device vnode first comes into existence,
check to see if an anonymous vnode for the same device was created
at boot time by bdevvp(). If so, adopt the bdevvp vnode rather than
creating a new vnode for the device. This corrects a problem which
caused the kernel to panic when taking a snapshot of the root
filesystem.

Change the calling convention of vn_write_suspend_wait() to be the
same as vn_start_write().

Split out softdep_flushworklist() from softdep_flushfiles() so that
it can be used to clear the work queue when suspending filesystem
operations.

Access to buffers becomes recursive so that snapshots can recursively
traverse their indirect blocks using ffs_copyonwrite() when checking
for the need for copy on write when flushing one of their own indirect
blocks. This eliminates a deadlock between the syncer daemon and a
process taking a snapshot.

Ensure that softdep_process_worklist() can never block because of a
snapshot being taken. This eliminates a problem with buffer starvation.

Cleanup change in ffs_sync() which did not synchronously wait when
MNT_WAIT was specified. The result was an unclean filesystem panic
when doing forcible unmount with heavy filesystem I/O in progress.

Return a zero'ed block when reading a block that was not in use at
the time that a snapshot was taken. Normally, these blocks should
never be read. However, the readahead code will occationally read
them which can cause unexpected behavior.

Clean up the debugging code that ensures that no blocks be written
on a filesystem while it is suspended. Snapshots must explicitly
label the blocks that they are writing during the suspension so that
they do not cause a `write on suspended filesystem' panic.

Reorganize ffs_copyonwrite() to eliminate a deadlock and also to
prevent a race condition that would permit the same block to be
copied twice. This change eliminates an unexpected soft updates
inconsistency in fsck caused by the double allocation.

Use bqrelse rather than brelse for buffers that will be needed
soon again by the snapshot code. This improves snapshot performance.
2000-07-24 05:28:33 +00:00
Kirk McKusick
f2a2857bb3 Add snapshots to the fast filesystem. Most of the changes support
the gating of system calls that cause modifications to the underlying
filesystem. The gating can be enabled by any filesystem that needs
to consistently suspend operations by adding the vop_stdgetwritemount
to their set of vnops. Once gating is enabled, the function
vfs_write_suspend stops all new write operations to a filesystem,
allows any filesystem modifying system calls already in progress
to complete, then sync's the filesystem to disk and returns. The
function vfs_write_resume allows the suspended write operations to
begin again. Gating is not added by default for all filesystems as
for SMP systems it adds two extra locks to such critical kernel
paths as the write system call. Thus, gating should only be added
as needed.

Details on the use and current status of snapshots in FFS can be
found in /sys/ufs/ffs/README.snapshot so for brevity and timelyness
is not included here. Unless and until you create a snapshot file,
these changes should have no effect on your system (famous last words).
2000-07-11 22:07:57 +00:00
Alexander Langer
0cca1cc078 Fix typo (accessable --> accessible).
PR:		18588
Submitted by:	Anatoly Vorobey <mellon@pobox.com>
Reviewed by:	asmodai
2000-06-14 17:53:40 +00:00
Bruce Evans
61b9b2965c The change to do a longword compare in the previous commit just broke an
apparently-intended micro-optimization ("testb" is equivalent and smaller)
and added a style bug (the size suffix for "testl" was missing).
linux-2.3.35 already had the correct fix.
2000-06-03 11:09:09 +00:00
Peter Wemm
6a4c2576dc Mass update of isa drivers using compatability shims to use
COMPAT_ISA_DRIVER() so that we can get rid of the evil isa_compat.h table.
2000-05-28 13:40:48 +00:00