Commit Graph

1414 Commits

Author SHA1 Message Date
truckman
6174e9d812 Switch from using the vnode interlock to a private mutex in fifo_open()
to avoid lock order problems when manipulating the sockets associated
with the fifo.

Minor optimization of a couple of calls to fifo_cleanup() from
fifo_open().
2004-05-17 20:16:40 +00:00
alc
b57e5e03fd Make vm_page's PG_ZERO flag immutable between the time of the page's
allocation and deallocation.  This flag's principal use is shortly after
allocation.  For such cases, clearing the flag is pointless.  The only
unusual use of PG_ZERO is in vfs_bio_clrbuf().  However, allocbuf() never
requests a prezeroed page.  So, vfs_bio_clrbuf() never sees a prezeroed
page.

Reviewed by:	tegge@
2004-05-06 05:03:23 +00:00
phk
200ffbe56d Do not drop Giant around the poll method yet, we're not ready for it. 2004-04-12 21:52:52 +00:00
imp
b49b7fe799 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
pjd
a003db5b61 Remove ps_argsopen from this check, because of two reasons:
1. This check if wrong, because it is true by default
   (kern.ps_argsopen is 1 by default) (p_cansee() is not even checked).
2. Sysctl kern.ps_argsopen is going away.
2004-04-01 00:04:23 +00:00
rwatson
8eeaad5c11 Export uipc_connect2() from uipc_usrreq.c instead of unp_connect2(),
and consume that interface in portalfs and fifofs instead.  In the
new world order, unp_connect2() assumes that the unpcb mutex is
held, whereas uipc_connect2() validates that the passed sockets are
UNIX domain sockets, then grabs the mutex.

NB: the portalfs and fifofs code gets down and dirty with UNIX domain
sockets.  Maybe this is a bad thing.
2004-03-31 01:41:30 +00:00
scottl
5cbc345b39 Catch all cases where bread() returns an error and a valid *bp, and release
the *bp.

Obtained from:	DragonFlyBSD
2004-03-30 05:01:48 +00:00
peter
1f224a3d83 Clean up the stub fake vnode locking implemenations. The main reason this
stuff was here (NFS) was fixed by Alfred in November.  The only remaining
consumer of the stub functions was umapfs, which is horribly horribly
broken.  It has missed out on about the last 5 years worth of maintenence
that was done on nullfs (from which umapfs is derived).  It needs major
work to bring it up to date with the vnode locking protocol.  umapfs really
needs to find a caretaker to bring it into the 21st century.

Functions GC'ed:
vop_noislocked, vop_nolock, vop_nounlock, vop_sharedlock.
2004-03-29 22:41:21 +00:00
rwatson
67b7ca7cb8 Don't reject FAT file systems with a number of "Heads" greater than
255; USB keychains exist that use 256 as the number of heads.  This
check has also been removed in Darwin (along with most of the other
head/sector sanity checks).
2004-03-14 23:28:12 +00:00
green
da8d4a51f1 When taking event callbacks (like process_exit) out from under Giant, those
which do not lock Giant themselves will be exposed.  Unbreak pfs_exit().
2004-03-14 15:57:45 +00:00
phk
5c532f7fd4 When I was a kid my work table was one cluttered mess an cleaning it up
were a rather overwhelming task.  I soon learned that if you don't know
where you're going to store something, at least try to pile it next to
something slightly related in the hope that a pattern emerges.

Apply the same principle to the ffs/snapshot/softupdates code which have
leaked into specfs:  Add yet a buf-quasi-method and call it from the
only two places I can see it can make a difference and implement the
magic in ffs_softdep.c where it belongs.

It's not pretty, but at least it's one less layer violated.
2004-03-11 18:50:33 +00:00
phk
eeb7579130 Remove unused second arg to vfinddev().
Don't call addaliasu() on VBLK nodes.
2004-03-11 16:33:11 +00:00
phk
263999b14d Don't call devsw() more than we need to, and in particular do not expose
ourselves to device removal by not checking for it the second time.

Use count_dev(dev) rather than vcount(vp)
2004-03-10 20:56:28 +00:00
scottl
be64b495ab Change __FUNCTION__ to __func__
Submitted by:	Stefan Farfeleder
2004-03-03 07:43:34 +00:00
rwatson
b0b5f961bd Rename dup_sockaddr() to sodupsockaddr() for consistency with other
functions in kern_socket.c.

Rename the "canwait" field to "mflags" and pass M_WAITOK and M_NOWAIT
in from the caller context rather than "1" or "0".

Correct mflags pass into mac_init_socket() from previous commit to not
include M_ZERO.

Submitted by:	sam
2004-03-01 03:14:23 +00:00
phk
4666e8d5fb Do not attempt to open NODEV 2004-02-24 09:59:35 +00:00
tjr
a3493bb58a Fix comment containing vop_readdir_args contents: a_cookies is really
u_long ** not u_long *.
2004-02-23 01:43:00 +00:00
tjr
aeed6d0ca3 cookies is an array of u_long, not u_int, so MALLOC() it accordingly.
Allocating it with the wrong size could have caused corruption on
64-bit architectures.
2004-02-23 01:40:46 +00:00
bde
4159786890 Fixed a serious off by 1 error. The cluster-in-use bitmap was overrun
by 1 u_int if the number of clusters was 1 more than a multiple of
(8 * sizeof(u_int)).  The bitmap is malloced and large (often huge), so
fatal overrun probably only occurred if the number of clusters was 1
more than 1 multiple of PAGE_SIZE/8.
2004-02-21 22:47:19 +00:00
phk
5551e292d8 Device megapatch 6/6:
This is what we came here for:  Hang dev_t's from their cdevsw,
refcount cdevsw and dev_t and generally keep track of things a lot
better than we used to:

Hold a cdevsw reference around all entrances into the device driver,
this will be necessary to safely determine when we can unload driver
code.

Hold a dev_t reference while the device is open.

KASSERT that we do not enter the driver on a non-referenced dev_t.

Remove old D_NAG code, anonymous dev_t's are not a problem now.

When destroy_dev() is called on a referenced dev_t, move it to
dead_cdevsw's list.  When the refcount drops, free it.

Check that cdevsw->d_version is correct.  If not, set all methods
to the dead_*() methods to prevent entrance into driver.  Print
warning on console to this effect.  The device driver may still
explode if it is also incompatible with newbus, but in that case
we probably didn't get this far in the first place.
2004-02-21 21:57:26 +00:00
phk
39fb4aef3d Device megapatch 5/6:
Remove the unused second argument from udev2dev().

Convert all remaining users of makedev() to use udev2dev().  The
semantic difference is that udev2dev() will only locate a pre-existing
dev_t, it will not line makedev() create a new one.

Apart from the tiny well controlled windown in D_PSEUDO drivers,
there should no longer be any "anonymous" dev_t's in the system
now, only dev_t's created with make_dev() and make_dev_alias()
2004-02-21 21:32:15 +00:00
phk
ad925439e0 Device megapatch 4/6:
Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
2004-02-21 21:10:55 +00:00
phk
df260dfa17 Report the correct length for symlink entries. 2004-02-19 19:09:52 +00:00
tjr
ab89ce797c Use size_t or ssize_t wherever appropriate instead of casting from int *
to size_t *, which is incorrect because they may have different widths.
This caused some subtle forms of corruption, the mostly frequently
reported one being that the last character of a filename was sometimes
duplicated on amd64.
2004-02-19 09:56:58 +00:00
trhodes
768a8affab Do not place dirmask in unnamed padding. Move it to the bottom of this
list where it should have been added originally.

Prodded by:	bde
2004-02-17 16:53:41 +00:00
tjr
e426f6c0bc If the "next free cluster" field of the FSInfo block is 0xFFFFFFFF,
it means that the correct value is unknown. Since this value is just
a hint to improve performance, initially assume that the first non-reserved
cluster is free, then correct this assumption if necessary before writing
the FSInfo block back to disk.

PR:		62826
MFC after:	2 weeks
2004-02-17 08:51:49 +00:00
phk
758f11d127 White-space align a struct definition.
Move a SYSINIT to the file where it belongs.
2004-02-15 21:43:08 +00:00
bde
4dca0a78ca Fixed some style bugs:
- 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.
2004-02-14 04:41:13 +00:00
bde
c40486fc06 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
nectar
a96542610a Fix a panic in pseudofs(9) that could occur when doing an I/O
operation with a large request or large offset.

Reported by:	Joel Ray Holveck <joelh@piquan.org>
Submitted by:	des
2004-02-10 21:06:47 +00:00
tjr
40b810244f Fixes problems that occurred when a file was removed and a directory
created with the same name, and vice versa:
- Immediately recycle vnodes of files & directories that have been deleted
or renamed.
- When looking an entry in the VFS name cache or smbfs's private
cache, make sure the vnode type is consistent with the type of file
the server thinks it is, and re-create the vnode if it isn't.

The alternative to this is to recycle vnodes unconditionally when their
use count drops to 0, but this would make all the caching we do
mostly useless.

PR:		62342
MFC after:	2 weeks
2004-02-10 05:53:02 +00:00
jhb
279b2b8278 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
cperciva
b9ee343f9e Fix style(9) of my previous commit.
Noticed by: nate
Approved by: nate, rwatson (mentor)
2004-01-21 18:03:54 +00:00
cperciva
f2970382f1 Allow devfs path rules to work on directories. Without this fix,
devfs rule add path fd unhide
is a no-op, while it should unhide the fd subdirectory.

Approved by: phk, rwatson (mentor)
PR: kern/60897
2004-01-21 16:43:29 +00:00
kan
1968ea331b Spell magic '16' number as IO_SEQSHIFT. 2004-01-19 20:03:43 +00:00
green
c684933315 Do not allow operations which cause known file-system corruption. 2004-01-16 22:55:25 +00:00
green
f5f86e003a Remove a warning. 2004-01-16 22:54:33 +00:00
green
b67f04e53c Fix an upper-vnode leak created in revision 1.52. When an upper-layer
file has been removed, it should be purged from the cache, but it need
not be removed from the directory stack causing corruption; instead,
it will simply be removed once the last references and holds on it
are dropped at the end of the unlink/rmdir system calls, and the
normal !UN_CACHED VOP_INACTIVE() handler for unionfs finishes it off.

This is easily reproduced by repeated "echo >file; rm file" on a
unionfs mount.  Strangely, "echo -n >file; rm file" didn't make
it happen.
2004-01-16 16:31:01 +00:00
tjr
17a33cbd75 Fix an inverted test for NOPEN in the unused function smb_smb_flush(). 2004-01-12 14:43:49 +00:00
truckman
5be717c021 Don't try to unlock the directory vnode in null_lookup() if the lock is
shared with the underlying file system and the lookup in the underlying
file system did the unlock for us.
2004-01-11 23:44:32 +00:00
tjr
c2134f4017 Restore closing of SMB find handle in smbfs_close(). 2004-01-10 03:45:30 +00:00
rwatson
b3dbc3d2f9 Lock p->p_textvp before calling vn_fullpath() on it. Note the
potential lock order concern due to the vnode lock held
simultaneously by the caller into procfs.

Reported by:	kuriyama
Approved by:	des
2004-01-07 17:58:51 +00:00
tjr
b872c27d4a In smbfs_inactive(), only invalidate the node's attribute cache if we
had to send a file close request to the server.
2004-01-04 00:57:22 +00:00
tjr
6bccc23255 Pass ACL, extended attribute and MAC vnode ops down the vnode stack. 2004-01-03 00:36:46 +00:00
phk
5b996ad186 Improve on POLA by populating DEVFS before doing devfs(8) rule ioctls.
PR:	60687
Spotted by:	Colin Percival <cperciva@daemonology.net>
2004-01-02 19:02:28 +00:00
bde
a3659bc228 Fixed some (most) style bugs in rev.1.33. Mainly 4-char indentation
(msdosfs uses normal 8-char indentation almost everywhere else),
too-long lines, and minor English usage errors.  The verbose formal
comment before the new function is still abnormal.
2003-12-29 11:59:05 +00:00
bde
783363bac1 Fixed some minor style bugs in rev.1.144. All related to msdosfs_advlock()
(mainly unsorting).  There were no changes related to the dirty flag
here.  The reference NetBSD implementation put msdosfs_advlock() in a
different place.  This commit only moves its declarations and changes
some of the function body to be like the NetBSD version.
2003-12-29 10:12:02 +00:00
bde
e56230b222 Fixed style bugs in rev.1.112. The bugs started with obscure magic
numbers in comments (Apple PR numbers?) and didn't improve.
2003-12-29 09:50:42 +00:00
bde
7d91626477 v_vxproc was a bogus name for a thread (pointer). 2003-12-28 09:12:56 +00:00
trhodes
7dde93f1df Make msdosfs support the dirty flag in FAT16 and FAT32.
Enable lockf support.

PR:		55861
Submitted by:	Jun Su <junsu@m-net.arbornet.org> (original version)
Reviewed by:	make universe
2003-12-26 17:19:19 +00:00