Commit Graph

200 Commits

Author SHA1 Message Date
Bruce Evans
c626216f51 Removed FIFO ifdef again (see rev.1.5). 1997-02-13 00:42:10 +00:00
Mike Pritchard
724ab19569 Add function prototypes for most of the new Lite2 functions.
Also made a few of the miscfs routines static to be
consistent.  Some modules simply required some additional
#includes to remove -Wall warnings.
1997-02-12 06:52:51 +00:00
Mike Pritchard
812ac98e83 Correct the new Lite2 #ifdef DIAGNOSTIC ffs_checkblk routine
to not return without setting a return value when it
can't read a block error or detects a bad cylinder group,
since the caller is expecting a return value.
It will now panic at this point, since the thing
to do in this case would be to return a "bad block"
status to the caller, and the caller will panic
anyways when that happens.

Also updated to panic strings in this routine to read
"ffs_checkblk: ..." instead of "checkblk: ...".
1997-02-10 17:05:30 +00:00
Mike Pritchard
04a0d5e517 Make this compile after the Lite2 merge.
A non-existent variable was being used.
1997-02-10 16:29:32 +00:00
Mike Pritchard
d2b52eb257 Make ffs_subr.c compile when DIAGNOSTIC is defined.
It looks like this was broken before the Lite2 merge :-(.
VOP_BMAP was being called with the wrong number of arguments.
1997-02-10 16:27:53 +00:00
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
John Dyson
8b612c4b4a This commit is the embodiment of some VFS read clustering improvements.
Firstly, now our read-ahead clustering is on a file descriptor basis and not
on a per-vnode basis.  This will allow multiple processes reading the
same file to take advantage of read-ahead clustering.  Secondly, there
previously was a problem with large reads still using the ramp-up
algorithm.  Of course, that was bogus, and now we read the entire
"chunk" off of the disk in one operation.   The read-ahead clustering
algorithm should use less CPU than the previous also (I hope :-)).

NOTE:  THAT LKMS MUST BE REBUILT!!!
1996-12-29 02:45:28 +00:00
John Dyson
b68a757139 Significant performance improvement for mmap'ed files. This commit
makes MADV_SEQUENTIAL much more effective.  I suggest that
we start using MADV_SEQUENTIAL on system utilities that mmap
their input files, and the I/O is predominantely sequential.
Below is a test with 'cmp' on two relatively large binary files,
where the files are so large that the caching is ineffective:

+ ls -l t1.xxx t2.xxx
-rw-r--r--  1 root  wheel  65598384 Dec 10 12:13 t1.xxx
-rw-r--r--  1 root  wheel  65598384 Dec 10 12:14 t2.xxx

+ time cmp t1.xxx t2.xxx
3.78user 0.70system 1:33.43elapsed 4%CPU

+ time cmpmadv t1.xxx t2.xxx
4.21user 1.05system 0:30.93elapsed 17%CPU

This change is as a result of an observation made by BDE.
1996-12-11 05:17:23 +00:00
Bruce Evans
4eb73cdaff Removed all references to b_cylinder (aka b_cylin). It was evil and
hasn't been used for a year or two since disksort() started sorting
on b_pblkno.
1996-12-01 16:34:41 +00:00
Søren Schmidt
7cb29d3394 This update adds the support for != 512 byte sector SCSI devices to
the sd & od drivers. There is also slight changes to fdisk & newfs
in order to comply with different sectorsizes.
Currently sectors of size 512, 1024 & 2048 are supported, the only
restriction beeing in fdisk, which hunts for the sectorsize of
the device.
This is based on patches to od.c and the other system files by
John Gumb & Barry Scott, minor changes and the sd.c patches by
me.
There also exist some patches for the msdos filesys code, but I
havn't been able to test those (yet).

	John Gumb (john@talisker.demon.co.uk)
	Barry Scott (barry@scottb.demon.co.uk)
1996-12-01 11:25:38 +00:00
Julian Elischer
3f6f17ee1e Submitted by: Archie and me.
We encountered an interesting situation where the superblock for
a file system got written to disk with the "fs_fmod" flag set to
one. It appears that this flag is normally supposed to be cleared
during ffs_sync(), but we experienced a crash, or some other weird
occurrence that left it on the disk set to 1.

Later this partition was mounted read-only... and the fs_fmod
field was never cleared, causing ffs_sync() to panic "rofs mod"
when trying to unmount that filesystem (ffs_vfsops.c: line 790).

fix:
set this bit to 0 when you load the superblock from disk.
(see more complete mail on this to hackers)
1996-11-13 01:45:56 +00:00
David Greenman
e75838f701 Eliminate an unnecessary synchronous write (and an 8K bcopy+bzero) when
truncating/deleting large files.

Reviewed by:	mckusick, dyson
Submitted by:	Kirk McKusick <mckusick@mckusick.com>, modified for
		FreeBSD by me.
1996-11-05 08:19:40 +00:00
Jeffrey Hsu
78769fbc6a struct mfsnode bloated in size by 12 bytes, so reduce spare padding by 3 longs.
We now only have 4 spare bytes before hitting the dreaded 32 byte threshold.
1996-11-04 20:53:02 +00:00
Bruce Evans
206e5b7e27 Fixed some races and misleading comments in ufs_rename().
1. When a directory is renamed to an existing (empty) directory,
it is possible for the target vnode to become the source vnode
underneath you (because another process may complete the same
rename).  It was assumed that this can't happen, and the bogus
errno EINVAL was returned.  This was fairly harmless.

Fix: return ENOENT instead, as if the source directory was renamed
a little earlier.

2. The same metamorphosis is possible for non-directories.  It was
assumed that this can't happen, and the code for handling "just
removing a link name" happened to be used.  This would have worked
except for fatal bugs in the link name removal - the link name was
assumed to still be there, and a null pointer was followed.

Fix: check the result of relookup().  This fixes PR 1930.

Notes:

(a) POSIX seems to say that removing link names shall have no effect.
BSD (4.4Lite2 at least) does something reasonable instead.

(b) The relookup() may find a file unrelated to the original.
Removing this isn't correct.  Consider 3 existing files A, B and
C, and concurrent renames: AB = rename(A, B), another AB, and
CA = rename("c", "a").  If rename() is atomic, then only the
following results are possible:

	AB, AB (fails), CA: A = original C, B = original A, C = gone
	AB, CA, AB:         A = gone,       B = original C, C = gone
	CA, AB, AB (fails): A = gone,       B = original C, C = gone

but ufs_rename() can give:

	A,AB,CA,B (sorta):  A = gone,       B = original A, C = gone

This usually doesn't matter, since getting into a race is usually
an error.
---

These fixes should be in 2.1.6 and 2.2.
1996-11-04 16:05:51 +00:00
Bruce Evans
ccb174975a Fixed lblktosize(). It overflowed at 2G. This bug only affected
ufs_read() and ufs_write().

Found by: looking at warnings for comparing the result of lblktosize()
(which is usually daddr_t = long) with file sizes (which are u_quad_t
for ufs).  File sizes should probably be off_t's to avoid warnings
when the are compared with file offsets, so the fixed lblktosize()
casts to off_t instead of u_quad_t.

Added definition of smalllblksize().  It is the same as the old
lblksize() and is more efficient for small block numbers on 32-bit
machines.

Use smalllblktosize() instead of its expansion in blksize() and
dblksize().  This keeps the line length short and makes it more
obvious that the shift can't overflow.
1996-10-12 22:12:51 +00:00
Bruce Evans
253c0899b2 Don't include <sys/conf.h> for the kernel in disk-related headers.
It is needed for implementation details but very little of it is
needed for the interface.  Include it in the few places that didn't
already include it.

Include <sys/ioccom.h> in <sys/disklabel.h> (as already in
<sys/diskslice.h>) so that all the disk-related headers are almost
self-sufficient.
1996-09-20 17:39:44 +00:00
Nate Williams
d977b72dbd Whoops, I should've used the LINT config file. More ts -> tv changes
for timespec structure.
1996-09-20 05:56:36 +00:00
Nate Williams
030e2e9ebb In sys/time.h, struct timespec is defined as:
/*
         * Structure defined by POSIX.4 to be like a timeval.
         */
        struct timespec {
                time_t  ts_sec;         /* seconds */
                long    ts_nsec;        /* and nanoseconds */
        };

        The correct names of the fields are tv_sec and tv_nsec.

Reminded by:	James Drobina <jdrobina@infinet.com>
1996-09-19 18:21:32 +00:00
Peter Wemm
7b8830a51e Argh, I have had one "uid 0 on /: file system full" too many. The problem
is that it doesn't say _what_ did it! (the core dumped console message
is very useful for listing the process name and pid).  This adds similar
information.
1996-09-17 14:38:16 +00:00
John Dyson
c645dc1239 Fix a VOP_UNLOCK panic when using options DIAGNOSTIC during dismount. 1996-09-07 17:34:57 +00:00
Justin T. Gibbs
23da239df6 Use bowrite instead of VOP_BWRITE in a few cases. This can probably be taken
further.
1996-09-06 05:36:29 +00:00
Bruce Evans
b71fec07db Eliminated nested include of <sys/unistd.h> in <sys/file.h> in the kernel.
Include it directly in the few places where it is used.

Reduced some #includes of <sys/file.h> to #includes of <sys/fcntl.h> or
nothing.
1996-09-03 14:25:27 +00:00
David Greenman
9e04304259 Implemented kernel side of MNT_NOATIME mount option. This option disables
the file access time update on reads and can be useful in reducing
filesystem overhead in cases where the access time is not important (like
Usenet news spools).
1996-09-03 07:09:11 +00:00
Bruce Evans
09a8dfa260 Don't depend in the kernel on the gcc feature of doing arithmetic on
pointers of type `void *'.  Warn about this in future.
1996-08-31 14:48:13 +00:00
John Dyson
6476c0d204 Even though this looks like it, this is not a complex code change.
The interface into the "VMIO" system has changed to be more consistant
and robust.  Essentially, it is now no longer necessary to call vn_open
to get merged VM/Buffer cache operation, and exceptional conditions
such as merged operation of VBLK devices is simpler and more correct.

This code corrects a potentially large set of problems including the
problems with ktrace output and loaded systems, file create/deletes,
etc.

Most of the changes to NFS are cosmetic and name changes, eliminating
a layer of subroutine calls.  The direct calls to vput/vrele have
been re-instituted for better cross platform compatibility.

Reviewed by: davidg
1996-08-21 21:56:23 +00:00
Bruce Evans
6ab46d52a5 Don't use NULL in non-pointer contexts. 1996-07-12 04:12:25 +00:00
Garrett Wollman
5c17ec631e Quiet a couple of -Wunused warnings. 1996-07-09 16:51:18 +00:00
David Greenman
b9355dedd9 Fixed end condition for clustered reads.
Submitted by:	Kirk McKusick via Lite-2 and email
1996-06-25 03:00:44 +00:00
Gary Palmer
c23670e294 Clean up -Wunused warnings.
Reviewed by:		bde
1996-06-12 05:11:41 +00:00
David Greenman
2f9bae59d6 Moved the fsnode MALLOC to before the call to getnewvnode() so that the
process won't possibly block before filling in the fsnode pointer (v_data)
which might be dereferenced during a sync since the vnode is put on the
mnt_vnodelist by getnewvnode.

Pointed out by Matt Day <mday@artisoft.com>
1996-06-12 03:37:57 +00:00
Gary Palmer
6ddbf1e299 Clean up various compiler warnings. Most (if not all) were benign
Reviewed by:	bde
1996-05-08 04:29:08 +00:00
Poul-Henning Kamp
ab76ac21e7 disksort() is gone, all drivers now use tqdisksort(). 1996-05-03 15:05:17 +00:00
Poul-Henning Kamp
e911eafcba removed:
CLBYTES PD_SHIFT PGSHIFT NBPG PGOFSET CLSIZELOG2 CLSIZE pdei()
        ptei() kvtopte() ptetov() ispt() ptetoav() &c &c
new:
        NPDEPG

Major macro cleanup.
1996-05-02 14:21:14 +00:00
Bruce Evans
2043dc9a22 Removed bogus _BEGIN_DECLS/_END_DECLS.
Removed unused struct tag declarations in cloned code.

Added or cleaned up idempotency ifdefs.
1996-05-01 02:16:17 +00:00
Bruce Evans
10d245c58a Yet more b_flags fixes. The previous ones broke the clearing of B_DONE
and B_READ before writing.  This was was fatal.  They also broke the
clearing of B_INVAL before doing i/o.  This didn't actually matter.

Submitted by:	mostly by joerg
1996-04-19 19:34:19 +00:00
Poul-Henning Kamp
b96b6bb1e6 Replace usage of buf->b_actf by queue.3 and buf->b_act 1996-04-08 07:54:51 +00:00
Bruce Evans
a1fbfdff14 Fixed reference counting related to relookup(). relookup() must
be called with the directory referenced, and this reference will
be dropped iff relookup() fails, so the value returned must not be
ignored.

Reviewed by:	davidg
1996-03-29 12:30:30 +00:00
Jeffrey Hsu
b9258a868b Make type compatible with Lite2.
Submitted by:	bde
1996-03-27 07:58:57 +00:00
John Dyson
847a3ba792 Handle the bogus device that MFS uses as its VBLK device. We now don't
try to VMIO open it on MFS mounts.  This will fix the mfs_badops
panic.
1996-03-02 22:18:34 +00:00
John Dyson
91477adc6e Enable VMIO for non-VDIR metadata and block device. 1996-03-02 03:45:12 +00:00
John Dyson
33309c7fc0 More b_flags fixes. 1996-03-02 01:49:51 +00:00
John Dyson
f5d1e6dae6 Fix a bug that b_flags was getting unnecessarily modified by
the slice code.  The effect up to now has been insignficant, but
improved buffer allocation code will break with this problem.
1996-03-01 19:01:04 +00:00
Mike Pritchard
86abf1c4b2 Add a prototype for the quotactl system call. 1996-02-27 07:57:57 +00:00
Bruce Evans
e6302eab11 Removed vestigial support for the obsolete FIFO option. In ext2fs
it caused null pointer panics for all fifo operations unless FIFO
was defined.
1996-02-25 20:12:36 +00:00
Mike Pritchard
6c5e9bbdf5 Fix a bunch of spelling errors in the comment fields of
a bunch of system include files.
1996-01-30 23:02:38 +00:00
John Dyson
bd7e5f992e Eliminated many redundant vm_map_lookup operations for vm_mmap.
Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish
	overhead for merged cache.
Efficiency improvement for vfs_cluster.  It used to do alot of redundant
	calls to cluster_rbuild.
Correct the ordering for vrele of .text and release of credentials.
Use the selective tlb update for 486/586/P6.
Numerous fixes to the size of objects allocated for files.  Additionally,
	fixes in the various pagers.
Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs.
Fixes in the swap pager for exhausted resources.  The pageout code
	will not as readily thrash.
Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into
	page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE),
	thereby improving efficiency of several routines.
Eliminate even more unnecessary vm_page_protect operations.
Significantly speed up process forks.
Make vm_object_page_clean more efficient, thereby eliminating the pause
	that happens every 30seconds.
Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the
	case of filesystems mounted async.
Fix a panic with busy pages when write clustering is done for non-VMIO
	buffers.
1996-01-19 04:00:31 +00:00
Bruce Evans
51ea8b57b8 Partially fixed negative and truncated "Avail" counts in df output.
This fixes PR943.

ffs/ffs_vfsops.c:
ffs_statfs() multiplied by (100 - minfree) as part of calculating the
minfree percentage (complemented in 100%), so with the standard minfree
of 8, it was broken for file systems of size >= 1TB/92 = 11GB.  Use the
standard freespace() macro instead.  This also fixes a rounding bug (the
"Avail" count was sometimes 1 too small).

ffs/* (not fixed):
The freespace() macro multiplies by minfree, so with the standard
minfree of 8, it is broken for file systems of size >= 1TB/8 = 128GB.
This bug is more serious since it affects block allocation.

ffs/ffs_alloc.c (not fixed):
Ordinary users are sometimes allowed to allocate 1 (partial) block
too many so that the "Avail" count goes negative.  E.g., if there is
1 fragment available and the file is fairly large, one more full
block is allocated.

df/df.c:
ufs_df() used/uses essentially the same code as ffs_statfs(), so it
had/has the same bugs.

ufs_df() gratuitously replaced "Avail" counts of < 0 by 0, so it
gave different results for non-mounted file systems in this case.
1996-01-14 18:55:09 +00:00
Poul-Henning Kamp
c68970939f The second cast wasn't needed.
Submitted by:	bde
1996-01-07 09:42:36 +00:00
Poul-Henning Kamp
5f7351637a Fix the asami&phk bug. This was a sign-extension bug, where a long
got multiplied by a constant before being upgraded to long long.
This should fix kern/104 and possibly kern/105.
Thanks to: dyson & asami.
1996-01-06 12:49:53 +00:00