Commit Graph

550 Commits

Author SHA1 Message Date
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
Poul-Henning Kamp
b7ffb34243 Pull the rug under block mode devices. they return ENXIO on open(2) now. 2000-07-03 13:48:37 +00:00
Chris Costello
726bd7bebf fdesc_getattr:
Don't fake any file types, just set vap->va_type to IFTOVT(stb.st_mode).
  If something does not report its mode, vap->va_type is set to VNON
  accordingly.
2000-06-28 19:18:25 +00:00
Alfred Perlstein
974c7068d7 by changing the logic here we can support dynamic additions of new
filetypes.

Reviewed by: green
2000-06-27 22:46:35 +00:00
Alfred Perlstein
70cb8de9ba if there are leading zeros fail the lookup
Pointed out by: Alexander Viro <viro@math.psu.edu>
2000-06-27 21:37:17 +00:00
Chris Costello
04e58856a6 Rename the VRXEC' macro used to clear read and exec bits to FDRX' so
as not to impede upon VFS namespace.
2000-06-20 20:34:11 +00:00
Poul-Henning Kamp
a2e7a027a7 Virtualizes & untangles the bioops operations vector.
Ref: Message-ID: <18317.961014572@critter.freebsd.dk> To: current@
2000-06-16 08:48:51 +00:00
Chris Costello
0b1574bd33 Remove unused include <sys/socketvar.h>. 2000-06-15 20:13:51 +00:00
Chris Costello
3b5ec07347 Replace vattr_null() with VATTR_NULL() and do not explicity set vattr
fields to VNOVAL afterwards.
2000-06-15 17:19:22 +00:00
Jonathan M. Bresler
caea99a368 before this commit, specfs reported disk partitions
using decimal major and minor numbers.  "ls -l" reports
	disk partitions using decimal major numbers and hex
	minor numbers.

	make specfs use decimal major numbers and hex minor numbers,
	just like "ls -l"
2000-06-12 10:20:18 +00:00
Chris Costello
f574046378 Instead of completely disallowing VOP_SETATTR, just do it where there is
an underlying vnode.

Suggested by:	bde
2000-06-06 00:35:39 +00:00
Chris Costello
c1e15e06bb Update the comment for fdesc_setattr to reflect that we no longer
actually setattr() on underlying vnodes.
2000-06-02 07:08:18 +00:00
Chris Costello
908a81d424 - Do not allow VOP_SETATTR to modify underlying vnodes at all. This caused
problems when fetch(1) was passed `-o -'.  The rationale of this change
  is that applications attempting to change underlying vnodes for /dev/fd
  nodes are improperly written and the use of this interface should not
  ever have been encouraged.  Proper alternatives are fchmod, fchown and
  others.

  PR:		18952

- Remove stale, unused fdescnode->fd_link structure member.
2000-06-02 07:02:45 +00:00
Jake Burkholder
e39756439c Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by:		msmith and others
2000-05-26 02:09:24 +00:00
Jake Burkholder
740a1973a6 Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by:	phk
Reviewed by:	phk
Approved by:	mdodd
2000-05-23 20:41:01 +00:00
Chris Costello
38edb6a32f Adapt fdesc to be mounted on /dev/fd and remove fd, stdin, stdout and
stderr nodes.  More specific items of this patch:
  o Removed support for symbolic links, and the need for
    fdesc_readlink().
  o Put all the code from fdesc_attr() into fdesc_getattr() and removed
    fdesc_attr().  This also made it easier to properly give all nodes
    unique inode numbers.
  o The removal of all non-fd nodes allowed the removal of the fdesc_read(),
    fdesc_write(), and fdesc_ioctl() nodes, since we no longer have nodes
    that get special handling.
  o Correct the component name validity-checking in fdesc_lookup().  It
    previously detected the end of the string by checking for a terminating
    NUL, now it uses cnp->cn_namelen.
  o Handle kqueue files as FIFOs.  This is probably the closest file type
    to represent this type of file there is, and it is unfortunately not
    very representative of a kqueue.  Creation time is not supported by
    kqueue, so ctime, mtime and atime are all set to the current time when
    getattr() was called.
  o Also set st_[mca]time to the current time since there's no data in
    socket structures that can be used to fill this in (FIFOs).
  o Simplify fdesc_readdir() since it only has to report the numbered
    fd nodes.  Add `.' and `..' directory links as well.
  o Remove read bits from directories as they tend to confuse programs
    like tar(1).

Reviewed by:	phk
Discussed with:	bde (earlier on, not quite review)
2000-05-11 22:10:51 +00:00
Poul-Henning Kamp
192c06ea1b Change the "bdev-whiner" to whine when open is attempted and extend
the deadline a month.
2000-05-09 18:53:57 +00:00
Poul-Henning Kamp
9626b608de Separate the struct bio related stuff out of <sys/buf.h> into
<sys/bio.h>.

<sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall
not be made a nested include according to bdes teachings on the
subject of nested includes.

Diskdrivers and similar stuff below specfs::strategy() should no
longer need to include <sys/buf.> unless they need caching of data.

Still a few bogus uses of struct buf to track down.

Repocopy by:    peter
2000-05-05 09:59:14 +00:00
Peter Wemm
365c5db0a7 Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
Poul-Henning Kamp
2c9b67a8df Remove unneeded #include <vm/vm_zone.h>
Generated by:	src/tools/tools/kerninclude
2000-04-30 18:52:11 +00:00
Poul-Henning Kamp
eb95c536ad Remove unneeded #include <sys/kernel.h> 2000-04-29 15:36:14 +00:00
Brian Feldman
b7db19017b Move procfs_fullpath() to vfs_cache.c, with a rename to textvp_fullpath().
There's no excuse to have code in synthetic filestores that allows direct
references to the textvp anymore.

Feature requested by:	msmith
Feature agreed to by:	warner
Move requested by:	phk
Move agreed to by:	bde
2000-04-26 11:57:45 +00:00
Brian Feldman
28749c79c8 Quiet an unused variable warning by commenting out a variable declaration
that goes with a commented out statement.
2000-04-22 17:58:40 +00:00
Brian Feldman
bb529be712 There's no reason to make "file" 0500 rather than 0555. 2000-04-22 04:01:54 +00:00
Brian Feldman
081d7b00c7 Welcome back our old friend from procfs, "file"! 2000-04-22 03:44:41 +00:00
Mike Smith
387d034f45 Remove the linprocfs bits from their old location, as they've moved now. 2000-04-20 03:56:10 +00:00
Poul-Henning Kamp
3389ae9350 Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>
2000-04-19 14:58:28 +00:00
Poul-Henning Kamp
ed6aff7387 Remove unneeded <sys/buf.h> includes.
Due to some interesting cpp tricks in lockmgr, the LINT kernel shrinks
by 924 bytes.
2000-04-18 15:15:39 +00:00
Jonathan Lemon
cb679c385e Introduce kqueue() and kevent(), a kernel event notification facility. 2000-04-16 18:53:38 +00:00
Poul-Henning Kamp
8177437d85 Complete the bio/buf divorce for all code below devfs::strategy
Exceptions:
        Vinum untouched.  This means that it cannot be compiled.
        Greg Lehey is on the case.

        CCD not converted yet, casts to struct buf (still safe)

        atapi-cd casts to struct buf to examine B_PHYS
2000-04-15 05:54:02 +00:00
Poul-Henning Kamp
c244d2de43 Move B_ERROR flag to b_ioflags and call it BIO_ERROR.
(Much of this done by script)

Move B_ORDERED flag to b_ioflags and call it BIO_ORDERED.

Move b_pblkno and b_iodone_chain to struct bio while we transition, they
will be obsoleted once bio structs chain/stack.

Add bio_queue field for struct bio aware disksort.

Address a lot of stylistic issues brought up by bde.
2000-04-02 15:24:56 +00:00
Dag-Erling Smørgrav
c2c0fac9c9 Attempt to provide real values for meminfo. 2000-03-25 19:41:18 +00:00
Dag-Erling Smørgrav
8deca17b79 Linux /proc filesystem.
Submitted by:	pb
2000-03-25 13:23:02 +00:00
Poul-Henning Kamp
b99c307a21 Rename the existing BUF_STRATEGY() to DEV_STRATEGY()
substitute BUF_WRITE(foo) for VOP_BWRITE(foo->b_vp, foo)

substitute BUF_STRATEGY(foo) for VOP_STRATEGY(foo->b_vp, foo)

This patch is machine generated except for the ccd.c and buf.h parts.
2000-03-20 11:29:10 +00:00
Poul-Henning Kamp
21144e3bf1 Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new
field in struct buf: b_iocmd.  The b_iocmd is enforced to have
exactly one bit set.

B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.

Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.

Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue.  It is likely to write on your disk
where it should have been reading.

This change is a step in the direction towards a stackable BIO capability.

A lot of this patch were machine generated (Thanks to style(9) compliance!)

Vinum users:  Greg has not had time to test this yet, be careful.
2000-03-20 10:44:49 +00:00
Poul-Henning Kamp
db5f635acc Eliminate the undocumented, experimental, non-delivering and highly
dangerous MAX_PERF option.
2000-03-16 08:51:55 +00:00
Robert Watson
8f0738756c Fix bde'isms in acl/extattr syscall interface, renaming syscalls to
prettier (?) names, adding some const's around here, et al.

Reviewed by:	bde
2000-01-19 06:07:34 +00:00
Poul-Henning Kamp
ba4ad1fcea Give vn_isdisk() a second argument where it can return a suitable errno.
Suggested by:	bde
2000-01-10 12:04:27 +00:00
Peter Wemm
c447342094 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 05:07:58 +00:00
Peter Wemm
e0f9d2869a Fix typo "," vs ";"
PR:		15696
Submitted by:	Takashi Okumura <taka@cs.pitt.edu>
1999-12-27 16:03:38 +00:00
Chris Costello
1b900f573c Fix a typo that was doing something kind of silly, and that is initializing
the creation time for files to the uninitialized value:

	vap->va_ctime = vap->va_ctime;

Changed to what was intended, assigning it to the modification time (thus
making all three values of access time, modification time and creation time
the same thing).

Reviewed by:	grog
1999-12-21 06:29:00 +00:00
Eivind Eklund
a6b174a83b Include vm/vm_extern.h to get at prototypes 1999-12-20 18:26:58 +00:00
Eivind Eklund
874fa3e43e Eliminate unused variables 1999-12-20 18:26:02 +00:00
Robert Watson
91f37dcba1 Second pass commit to introduce new ACL and Extended Attribute system
calls, vnops, vfsops, both in /kern, and to individual file systems that
require a vfsop_ array entry.

Reviewed by:	eivind
1999-12-19 06:08:07 +00:00
Eivind Eklund
762e6b856c Introduce NDFREE (and remove VOP_ABORTOP) 1999-12-15 23:02:35 +00:00
Eivind Eklund
6bdfe06ad9 Lock reporting and assertion changes.
* lockstatus() and VOP_ISLOCKED() gets a new process argument and a new
  return value: LK_EXCLOTHER, when the lock is held exclusively by another
  process.
* The ASSERT_VOP_(UN)LOCKED family is extended to use what this gives them
* Extend the vnode_if.src format to allow more exact specification than
  locked/unlocked.

This commit should not do any semantic changes unless you are using
DEBUG_VFS_LOCKS.

Discussed with:	grog, mch, peter, phk
Reviewed by:	peter
1999-12-11 16:13:02 +00:00
Peter Wemm
99b30c79b0 Don't simulate a pseudo address-space beyond VM_MAXUSER_ADDRESS that
maps onto the upages.  We used to use this extensively, particularly
for ps and gdb.  Both of these have been "fixed".  ps gets the p_stats
via eproc along with all the other stats, and gdb uses the regs, fpregs
etc files.

Once apon a time the UPAGES were mapped here, but that changed back
in January '96.  This essentially kills my revisions 1.16 and 1.17.
The 2-page "hole" above the stack can be reclaimed now.
1999-12-11 10:21:34 +00:00
Poul-Henning Kamp
5ecdb702b0 Remove unused #includes.
Obtained from:	http://bogon.freebsd.dk/include
1999-12-08 08:59:40 +00:00
Kirk McKusick
e9cc475851 Collect read and write counts for filesystems. This new code
drops the counting in bwrite and puts it all in spec_strategy.
I did some tests and verified that the counts collected for writes
in spec_strategy is identical to the counts that we previously
collected in bwrite. We now also get read counts (async reads
come from requests for read-ahead blocks). Note that you need
to compile a new version of mount to get the read counts printed
out. The old mount binary is completely compatible, the only
reason to install a new mount is to get the read counts printed.

Submitted by:	Craig A Soules <soules+@andrew.cmu.edu>
Reviewed by:	Kirk McKusick <mckusick@mckusick.com>
1999-12-01 02:09:30 +00:00
Poul-Henning Kamp
c464420c89 Report swapdevices as cdevs rather than bdevs.
Remove unused dev2budev() function.
1999-11-29 21:37:18 +00:00