Commit Graph

565 Commits

Author SHA1 Message Date
Poul-Henning Kamp
c428d4c048 Kill the cdevsw->d_maxio field.
d_maxio is replaced by the dev->si_iosize_max field which the driver
should be set in all calls to cdevsw->d_open if it has a better
idea than the system wide default.

The field is a generic dev_t field (ie: not disk specific) so that
tapes and other devices can use physio as well.
1999-09-22 19:56:14 +00:00
Matthew Dillon
67ddfcaf69 More removals of vnode->v_lastr, replaced by preexisting seqcount
heuristic to detect sequential operation.

    VM-related forced clustering code removed from ufs in preparation for a
    commit to vm/vm_fault.c that does it more generally.

Reviewed by: David Greenman <dg@root.com>, Alan Cox <alc@cs.rice.edu>
1999-09-20 23:27:58 +00:00
Matthew Dillon
8411bf657d Fix handling of a device EOF that occurs in the middle of a block. The
transfer size calculation was incorrect resulting in the last read being
    potentially larger then the actual extent of the device.

    EOF and write handling has not yet been fixed.

Reviewed by:	Tor.Egge@fast.no
1999-09-20 23:17:47 +00:00
Poul-Henning Kamp
fae03f66d1 Step one of replacing devsw->d_maxio with si_bsize_max.
Rename dev->si_bsize_max to si_iosize_max and set it in spec_open
if the device didn't.

Set vp->v_maxio from dev->si_bsize_max in spec_open rather than
in ufs_bmap.c
1999-09-20 19:57:28 +00:00
Matthew Dillon
bb01f28e97 Add vfs.enable_userblk_io sysctl to control whether user reads and writes
to buffered block devices are allowed.  The default is to be backwards
    compatible, i.e. reads and writes are allowed.

    The idea is for a larger crowd to start running with this disabled and
    see what problems, if any, crop up, and then to change the default to
    off and see if any problems crop up in the next 6 months prior to
    potentially removing support entirely.  There are still a few people,
    Julian and myself included, who believe the buffered block device
    access from usermode to be useful.

    Remove use of vnode->v_lastr from buffered block device I/O in
    preparation for removal of vnode->v_lastr field, replacing it with
    the already existing seqcount metric to detect sequential operation.

Reviewed by:	Alan Cox <alc@cs.rice.edu>, David Greenman <dg@root.com>
1999-09-17 06:10:27 +00:00
Alfred Perlstein
c24fda81c9 Seperate the export check in VFS_FHTOVP, exports are now checked via
VFS_CHECKEXP.

Add fh(open|stat|stafs) syscalls to allow userland to query filesystems
based on (network) filehandle.

Obtained from:	NetBSD
1999-09-11 00:46:08 +00:00
Julian Elischer
85a219d201 Changes to centralise the default blocksize behaviour.
More likely to follow.

Submitted by: phk@freebsd.org
1999-09-09 19:08:44 +00:00
Alfred Perlstein
5a5fccc8e7 All unimplemented VFS ops now have entries in kern/vfs_default.c that return
reasonable defaults.

This avoids confusing and ugly casting to eopnotsupp or making dummy functions.
Bogus casting of filesystem sysctls to eopnotsupp() have been removed.

This should make *_vfsops.c more readable and reduce bloat.

Reviewed by:	msmith, eivind
Approved by:	phk
Tested by:	Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
1999-09-07 22:42:38 +00:00
Bruce Evans
a0f40f54aa Get rid of the NULLFS_DIAGNOSTIC option. This option was as useful as
the other XXXFS_DIAGNOSTIC options (not very) and mostly controlled
tracing of normal operation.  Use `#ifdef DEBUG' for non-diagnostics
and `#ifdef DIAGNOSTIC' for diagnostics.
1999-09-04 12:35:09 +00:00
Bruce Evans
622163afbe Fixed the previous change. Some more code controlled by UMAPFS_DIAGNOSTIC
is actually for diagnostics; control it with DIAGNOSTIC and not DDB.
1999-09-04 11:51:41 +00:00
Julian Elischer
1f7e07329d Print out the device name when there is an uninitialised IO size or IO error
in spec_getpages().

Submitted by:	phk suggested the idea.
1999-09-03 09:14:36 +00:00
Julian Elischer
c5d6480694 Add a catchall to set default blocksize values for disk like devices.
Submitted by:	phk@freebsd.org
1999-09-03 08:26:46 +00:00
Julian Elischer
7012bab988 Revert a bunch of contraversial changes by PHK. After
a quick think and discussion among various people some form of some of
these changes will probably be recommitted.

The reversion requested was requested by dg while discussions proceed.
PHK has indicated that he can live with this, and it has been agreed
that some form of some of these changes may return shortly after further
discussion.
1999-09-03 05:16:59 +00:00
Poul-Henning Kamp
fd559c6fc1 Fix the sense of the vn_isdisk() check. 1999-09-01 15:17:18 +00:00
Poul-Henning Kamp
3b7df19ba4 Set the buffersize for non BSDFFS labeled partitions to
max(dev->si_bsize_phys, BLKDEV_IOSIZE).

Requested by:   davidg
1999-08-31 21:46:42 +00:00
Poul-Henning Kamp
586e1b7b46 Make buffered acces to bdevs from userland controllable with
a sysctl vfs.bdev_access.
1999-08-31 21:01:57 +00:00
Poul-Henning Kamp
02e1576966 Make bdev userland access work like cdev userland access unless
the highly non-recommended option ALLOW_BDEV_ACCESS is used.

(bdev access is evil because you don't get write errors reported.)

Kill si_bsize_best before it kills Matt :-)

Use the specfs routines rather having cloned copies in devfs.
1999-08-30 07:56:23 +00:00
Bruce Evans
4047cd0bb2 Converted the silly SAFTEY option into a new-style option by renaming it to
DIAGNOSTIC.

Fixed an English style bug in the panic messages controlled by SAFETY.
1999-08-30 07:08:04 +00:00
Bruce Evans
8021ba879a Changed old-style option UNION_DIAGNOSTIC to DEBUG and fixed printf
format errors exposed by this.  It has nothing to do with diagnostics
since it does little more than control tracing of normal operation.
Actual diagnostics for the union file system are still controlled by
the DIAGNOSTIC option.
1999-08-29 10:03:35 +00:00
Bruce Evans
b00b6d73dd Changed old-style options UMAPFS_DIAGNOSTIC and UMAP_DIAGNOSTIC to DEBUG
or DDB and fixed printf format errors exposed by this.  The options had
little to do with diagnostics; they mostly controlled tracing of normal
operation.
1999-08-29 09:54:17 +00:00
Poul-Henning Kamp
94db13fe98 Fix various trivial warnings from LINT 1999-08-28 19:44:07 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Poul-Henning Kamp
dbafb3660f Simplify the handling of VCHR and VBLK vnodes using the new dev_t:
Make the alias list a SLIST.

        Drop the "fast recycling" optimization of vnodes (including
        the returning of a prexisting but stale vnode from checkalias).
        It doesn't buy us anything now that we don't hardlimit
        vnodes anymore.

        Rename checkalias2() and checkalias() to addalias() and
        addaliasu() - which takes dev_t and udev_t arg respectively.

        Make the revoke syscalls use vcount() instead of VALIASED.

        Remove VALIASED flag, we don't need it now and it is faster
        to traverse the much shorter lists than to maintain the
        flag.

        vfs_mountedon() can check the dev_t directly, all the vnodes
        point to the same one.

Print the devicename in specfs/vprint().

Remove a couple of stale LFS vnode flags.

Remove unimplemented/unused LK_DRAINED;
1999-08-26 14:53:31 +00:00
Poul-Henning Kamp
41d2e3e09e Introduce vn_isdisk(struct vnode *vp) function, and use it to test for diskness. 1999-08-25 12:24:39 +00:00
Julian Elischer
bb70475a92 Fix comment to match reality..
vop_strategy gets a vnode argument these days.
1999-08-25 00:26:34 +00:00
Bruce Evans
939cb7521a Initialise fsids with (user) device numbers again. Bitrot when dev_t's
were changed to pointers was obscured by casting dev_t's to longs.
fsids haven't even been comprised of longs since the Lite2 merge.
1999-08-23 21:07:13 +00:00
Poul-Henning Kamp
9dcbe2404a Convert DEVFS hooks in (most) drivers to make_dev().
Diskslice/label code not yet handled.

Vinum, i4b, alpha, pc98 not dealt with (left to respective Maintainers)

Add the correct hook for devfs to kern_conf.c

The net result of this excercise is that a lot less files depends on DEVFS,
and devtoname() gets more sensible output in many cases.

A few drivers had minor additional cleanups performed relating to cdevsw
registration.

A few drivers don't register a cdevsw{} anymore, but only use make_dev().
1999-08-23 20:59:21 +00:00
Marcel Moolenaar
63a9927353 Let processes retrieve their argv through procfs. Revert to the original
behaviour in all other cases.

Submitted by: Andrew Gordon <arg@arg1.demon.co.uk>
1999-08-19 19:41:08 +00:00
Alan Cox
2c28a10540 Add the (inline) function vm_page_undirty for clearing the dirty bitmask
of a vm_page.

Use it.

Submitted by:	dillon
1999-08-17 04:02:34 +00:00
Poul-Henning Kamp
49ff4debd3 Spring cleaning around strategy and disklabels/slices:
Introduce BUF_STRATEGY(struct buf *, int flag) macro, and use it throughout.
please see comment in sys/conf.h about the flag argument.

Remove strategy argument from all the diskslice/label/bad144
implementations, it should be found from the dev_t.

Remove bogus and unused strategy1 routines.

Remove open/close arguments from dssize().  Pick them up from dev_t.

Remove unused and unfinished setgeom support from diskslice/label/bad144 code.
1999-08-14 11:40:51 +00:00
Poul-Henning Kamp
2820b2e762 Add support for device drivers which want to track all open/close
operations.  This allows a device driver better insight into
what is going on that the current:

        proc1:  open /dev/foo R/O
                        devsw->open( R/O, proc1 )
        proc2:  open /dev/foo R/W
                        devsw->open( R/W, proc2 )
        proc2:  close
                        /* nothing, but device is
                           really only R/O open */
        proc1:  close
                        devsw->close( R/O, proc1 )
1999-08-13 16:29:27 +00:00
Poul-Henning Kamp
b3d7d91f32 Don't examine vp->v_tag (see comment in vnode.h) 1999-08-13 13:05:08 +00:00
Poul-Henning Kamp
608bb3ffdf Remove spec_getattr(), which as far as I can tell can never be called from the current code-paths, and if it were, would panic on any unmounted bdev. 1999-08-13 10:53:58 +00:00
Poul-Henning Kamp
7dc5cd047f The bdevsw() and cdevsw() are now identical, so kill the former. 1999-08-13 10:29:38 +00:00
Poul-Henning Kamp
4d4f932326 s/v_specinfo/v_rdev/ 1999-08-13 10:10:12 +00:00
Poul-Henning Kamp
0ef1c82630 Decommision miscfs/specfs/specdev.h. Most of it goes into <sys/conf.h>,
a few lines into <sys/vnode.h>.

Add a few fields to struct specinfo, paving the way for the fun part.
1999-08-08 18:43:05 +00:00
Bruce Evans
dd26feb90b Fixed printf format errors (%qu -> %llu; the arg was already unsigned long
long to hide problems on alphas).
1999-08-08 13:43:51 +00:00
Bruce Evans
f09d6e3daa Fixed all printf format errors reported by gcc -Wformat on i386's:
- %q -> %ll; don't assume that the promotion of off_t is quad_t; only
  assume that off_t's are representable as long longs.
- printing of dev_t's was completely broken.

Fixed nearby printf format errors not reported by gcc -Wformat on i386's:
- printing of ino_t's and pointers was sloppy.
1999-08-08 13:22:05 +00:00
Robert V. Baron
962e236ec0 The dev returned here is what is found in the st_dev field.
This should not be further translated ... hence the 0.
1999-08-02 20:55:11 +00:00
Bruce Evans
a2a0b22c90 Don't set DE_ACCESS for unsuccessful reads.
Translated from: a similar fix in ufs_readwrite.c rev.1.61.

Don't forget to set DE_ACCESS for short reads.

Check for invalid (negative) offsets before checking for reads of
0 bytes, as in ufs, although checking for invalid offsets at all
is probably a bug.
1999-07-25 04:01:32 +00:00
Poul-Henning Kamp
14b672a638 Remove the RCS "Log" and all the verbiage it has generated. 1999-07-21 12:51:36 +00:00
Poul-Henning Kamp
698bfad7f2 Now a dev_t is a pointer to struct specinfo which is shared by all specdev
vnodes referencing this device.

Details:
        cdevsw->d_parms has been removed, the specinfo is available
        now (== dev_t) and the driver should modify it directly
        when applicable, and the only driver doing so, does so:
        vn.c.  I am not sure the logic in checking for "<" was right
        before, and it looks even less so now.

        An intial pool of 50 struct specinfo are depleted during
        early boot, after that malloc had better work.  It is
        likely that fewer than 50 would do.

        Hashing is done from udev_t to dev_t with a prime number
        remainder hash, experiments show no better hash available
        for decent cost (MD5 is only marginally better)  The prime
        number used should not be close to a power of two, we use
        83 for now.

        Add new checkalias2() to get around the loss of info from
        dev2udev() in bdevvp();

        The aliased vnodes are hung on a list straight of the dev_t,
        and speclisth[SPECSZ] is unused.  The sharing of struct
        specinfo means that the v_specnext moves into the vnode
        which grows by 4 bytes.

        Don't use a VBLK dev_t which doesn't make sense in MFS, now
        we hang a dummy cdevsw on B/Cmaj 253 so that things look sane.

	Storage overhead from all of this is O(50k).

        Bump __FreeBSD_version to 400009

The next step will add the stuff needed so device-drivers can start to
hang things from struct specinfo
1999-07-20 09:47:55 +00:00
Poul-Henning Kamp
4fcd91ddf1 Don't access the device with vp->v_specinfo->si_rdev, use vp->v_rdev. 1999-07-20 07:18:17 +00:00
Poul-Henning Kamp
f008cfcc1a I have not one single time remembered the name of this function correctly
so obviously I gave it the wrong name.  s/umakedev/makeudev/g
1999-07-17 18:43:50 +00:00
Poul-Henning Kamp
46dcdb370e Allow jailed proccesses to open non-process vnodes like the root of the fs. 1999-07-09 21:31:44 +00:00
Peter Wemm
ebce412ca2 Use %q rather than rolling a custom routine. 1999-07-09 17:56:59 +00:00
Jonathan Lemon
d6c4f01106 Support for i386 hardware breakpoints.
Submitted by:	Brian Dean <brdean@unx.sas.com>
1999-07-09 04:18:32 +00:00
Jonathan Lemon
ab001a72be Implement support for hardware debug registers on the i386.
Submitted by:	Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
Poul-Henning Kamp
8947a90a90 Make sure that stat(2) and friends always return a valid st_dev field.
Pseudo-FS need not fill in the va_fsid anymore, the syscall code
will use the first half of the fsid, which now looks like a udev_t
with major 255.
1999-07-02 16:29:47 +00:00
Peter Wemm
919d1ea275 move <sys/systm.h> before <sys/buf.h> 1999-07-01 22:12:39 +00:00