Commit Graph

16 Commits

Author SHA1 Message Date
Ulrich Spörlein
9a14aa017b Convert files to UTF-8 2012-01-15 13:23:18 +00:00
Dag-Erling Smørgrav
388596dffc Make pseudofs (and consequently procfs, linprocfs and linsysfs) MPSAFE. 2007-04-15 17:10:01 +00:00
Dag-Erling Smørgrav
f61bc4ea5e Further pseudofs improvements:
The pfs_info mutex is only needed to lock pi_unrhdr.  Everything else
in struct pfs_info is modified only while Giant is held (during
vfs_init() / vfs_uninit()); add assertions to that effect.

Simplify pfs_destroy somewhat.

Remove superfluous arguments from pfs_fileno_{alloc,free}(), and the
assertions which were added in the previous commit to ensure they were
consistent.

Assert that Giant is held while the vnode cache is initialized and
destroyed.  Also assert that the cache is empty when it is destroyed.

Rename the vnode cache mutex for consistency.

Fix a long-standing bug in pfs_getattr(): it would uncritically return
the node's pn_fileno as st_ino.  This would result in st_ino being 0
if the node had not previously been visited by readdir(), and also in
an incorrect st_ino for process directories and any files contained
therein.  Correct this by abstracting the fileno manipulations
previously done in pfs_readdir() into a new function, pfs_fileno(),
which is used by both pfs_getattr() and pfs_readdir().
2007-04-14 14:08:30 +00:00
Dag-Erling Smørgrav
15bad11fdb Add a flag to struct pfs_vdata to mark the vnode as dead (e.g. process-
specific nodes when the process exits)

Move the vnode-cache-walking loop which was duplicated in pfs_exit() and
pfs_disable() into its own function, pfs_purge(), which looks for vnodes
marked as dead and / or belonging to the specified pfs_node and reclaims
them.  Note that this loop is still extremely inefficient.

Add a comment in pfs_vncache_alloc() explaining why we have to purge the
vnode from the vnode cache before returning, in case anyone should be
tempted to remove the call to cache_purge().

Move the special handling for pfstype_root nodes into pfs_fileno_alloc()
and pfs_fileno_free() (the root node's fileno must always be 2).  This
also fixes a bug where pfs_fileno_free() would reclaim the root node's
fileno, triggering a panic in the unr code, as that fileno was never
allocated from unr to begin with.

When destroying a pfs_node, release its fileno and purge it from the
vnode cache.  I wish we could put off the call to pfs_purge() until
after the entire tree had been destroyed, but then we'd have vnodes
referencing freed pfs nodes.  This probably doesn't matter while we're
still under Giant, but might become an issue later.

When destroying a pseudofs instance, destroy the tree before tearing
down the fileno allocator.

In pfs_mount(), acquire the mountpoint interlock when required.

MFC after:	3 weeks
2007-04-11 22:40:57 +00:00
Poul-Henning Kamp
7f661c6ba1 Use subr_unit 2005-03-19 08:22:36 +00:00
Dag-Erling Smørgrav
de52d21a02 fbsdidize. 2005-03-14 15:54:11 +00:00
Alexander Kabaev
104a9b7e3e Deprecate machine/limits.h in favor of new sys/limits.h.
Change all in-tree consumers to include <sys/limits.h>

Discussed on:	standards@
Partially submitted by: Craig Rodrigues <rodrigc@attbi.com>
2003-04-29 13:36:06 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Dag-Erling Smørgrav
a3d37b1322 Gratuitous whitespace cleanup. 2002-06-06 16:59:24 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on:	i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
Dag-Erling Smørgrav
41aa8697b5 Reduce the number of #include dependencies by declaring some of the structs
used in pseudofs.h as opaque structs.
2001-11-03 03:07:09 +00:00
Dag-Erling Smørgrav
21ceb6efa2 For some reason, though the module builds just fine without <sys/lock.h>,
LINT fails to build without it.
2001-06-11 15:04:48 +00:00
Dag-Erling Smørgrav
649ad985c9 Add support for process-dependent directories. This means that save for
the lack of a man page, pseudofs is mostly complete now.
2001-06-10 18:39:21 +00:00
Dag-Erling Smørgrav
49fa664f4e Add missing #include of <sys/mutex.h>. 2001-06-10 10:36:16 +00:00
Dag-Erling Smørgrav
9733a80839 Let pseudofs into the warmth of the FreeBSD CVS repo.
It's not finished yet (I still have to find a way to implement process-
dependent nodes without consuming too much memory, and the permission
system needs tightening up), but it's becoming hard to work on without
a repo (I've accidentally almost nuked it once already), and it works
(except for the lack of process-dependent nodes, that is).

I was supposed to commit this a week ago, but timed out waiting for jkh
to reply to some questions I had. Pass him a spoonful of bad karma :)
2001-04-07 19:51:12 +00:00