Commit Graph

16 Commits

Author SHA1 Message Date
Edward Tomasz Napierala
bb3fd7ff4f Remove unused variable. 2009-09-08 17:20:17 +00:00
Edward Tomasz Napierala
8edfe76ab5 Fix a panic which (reportedly) can happen when unmounting a filesystem
with I/O requests in flight on kernels compiled with "options INVARIANTS".
Also, make it obvious it's not right to call g_valid_obj() (and macros
using it, e.g. G_VALID_CONSUMER()) without topology lock held.

Approved by:	re (kib)
Reported by:	pho
2009-07-01 20:16:29 +00:00
Edward Tomasz Napierala
38153e80f7 Prevent a panic that happens on SMP machines when removing a disk with
many writes queued up.

Reviewed by:	phk, scottl
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation
2009-01-11 13:51:04 +00:00
Edward Tomasz Napierala
ce8be7b8b0 Implement g_vfs_orphan(). Without it, the filesystem never closes
the device, which means refcount on periph drivers never drops,
which means cam_sim_free() never returns, which results in umass
sleeping there ad infinitum.

Submitted by:	pjd
Reviewed by:	scottl, pjd
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation
2008-12-16 17:04:52 +00:00
Attilio Rao
0d7935fd01 Remove the struct thread unuseful argument from bufobj interface.
In particular following functions KPI results modified:
- bufobj_invalbuf()
- bufsync()

and BO_SYNC() "virtual method" of the buffer objects set.
Main consumers of bufobj functions are affected by this change too and,
in particular, functions which changed their KPI are:
- vinvalbuf()
- g_vfs_close()

Due to the KPI breakage, __FreeBSD_version will be bumped in a later
commit.

As a side note, please consider just temporary the 'curthread' argument
passing to VOP_SYNC() (in bufsync()) as it will be axed out ASAP

Reviewed by:	kib
Tested by:	Giovanni Trematerra <giovanni dot trematerra at gmail dot com>
2008-10-10 21:23:50 +00:00
Konstantin Belousov
2cc7d26f7f Cylinder group bitmaps and blocks containing inode for a snapshot
file are after snaplock, while other ffs device buffers are before
snaplock in global lock order. By itself, this could cause deadlock
when bdwrite() tries to flush dirty buffers on snapshotted ffs. If,
during the flush, COW activity for snapshot needs to allocate block
and ffs_alloccg() selects the cylinder group that is being written
by bdwrite(), then kernel would panic due to recursive buffer lock
acquision.

Avoid dealing with buffers in bdwrite() that are from other side of
snaplock divisor in the lock order then the buffer being written. Add
new BOP, bop_bdwrite(), to do dirty buffer flushing for same vnode in
the bdwrite(). Default implementation, bufbdflush(), refactors the code
from bdwrite(). For ffs device buffers, specialized implementation is
used.

Reviewed by:	tegge, jeff, Russell Cattelan (cattelan xfs org, xfs changes)
Tested by:	Peter Holm
X-MFC after:	3 weeks (if ever: it changes ABI)
2007-01-23 10:01:19 +00:00
Jeff Roberson
420239c773 - Lock Giant if needed around the call to vnode_create_vobject(). This is
only important if devfs is not mpsafe.

Sponsored by:	Isilon Systems, Inc.
Found by:	kris
2006-03-02 05:37:44 +00:00
Poul-Henning Kamp
dfd4be14bd Try to unbreak the vnode locking around vop_reclaim() (based mostly on
patch from kan@).

Pull bufobj_invalbuf() out of vinvalbuf() and make g_vfs call it on
close.  This is not yet a generally safe function, but for this very
specific use it is safe.  This solves the problem with buffers not
being flushed by unmount or after failed mount attempts.
2005-02-19 11:44:57 +00:00
Poul-Henning Kamp
07e95ed633 Make various random things static 2005-02-10 12:10:35 +00:00
Jeff Roberson
1907e62037 - If mpsafevfs is off, acquire giant around all calls to bufdone().
Sponsored by:   Isilon Systems, Inc.
2005-01-28 16:04:44 +00:00
Poul-Henning Kamp
84a6975215 Introduce and use g_vfs_close(). 2005-01-25 15:52:04 +00:00
Poul-Henning Kamp
bc0fc6fcc3 Create a correctly sized vnode objects for disk devices. 2005-01-24 22:41:21 +00:00
Jeff Roberson
e9f3e3f8ca - Don't acquire giant around calls to bufdone().
Sponsored By:   Isilon Systems, Inc.
2005-01-24 10:47:46 +00:00
Poul-Henning Kamp
6ef8480a88 Add BO_SYNC() and add a default which uses the secret vnode pointer
and VOP_FSYNC() for now.
2005-01-11 10:43:08 +00:00
Poul-Henning Kamp
f9eeb89522 Finish cut&paste adjustments.
Spotted by:	tegge
2004-11-04 07:17:08 +00:00
Poul-Henning Kamp
4d13ab3da2 Add GEOM class "VFS" for filesystems and other buffer cache users
of GEOM devices.

There is nothing magic about this, it just gives a bufobj interface
to GEOM.
2004-10-29 09:56:56 +00:00