CVS log for src/sys/kern/vfs_dirhash.c

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Keyword substitution: kv
Default branch: MAIN

vfs(9): Sprinkle KNF.

No functional change intended.

Remove reference to udf_node in comment; it is FS agnostic.

s/helt/held+s/eroneously/erroneously/+s/splitted/split/+s/recommented/recommended/

Sync with HEAD

Introduce PR_ZERO to avoid open-coding memset()s everywhere. OK riastradh@.

update from HEAD

Don't next structure and enum definitions.
Don't use C++ keywords new, try, class, private, etc.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Extend generic dirhash to include an empty directory checker based on
the knowledge the dirhash has. This is done by keeping a count of the current
hash entries.

sync to netbsd-5

sync with head.

Pull up following revision(s) (requested by martin in ticket #732):
	sys/kern/vfs_dirhash.c: revision 1.10
PR port-vax/41315:
Previous code ususally works since compiler won't put gap between
those struct members but there is no reason to rely on that.
While here, I rewrite the loop using an usual idiom.  It shaves
both source and object code.

Sync with HEAD.

file vfs_dirhash.c was added on branch yamt-nfs-mp on 2009-05-04 08:13:49 +0000

Previous code ususally works since compiler won't put gap between
those struct members but there is no reason to rely on that.
While here, I rewrite the loop using an usual idiom.  It shaves
both source and object code.

Sync with HEAD.

Sync with HEAD.

Pull up following revision(s) (requested by reinoud in ticket #212):
	sys/kern/vfs_dirhash.c: revision 1.9
When reusing a directory free space slot and thus finding it on the free space
list, do free it back into the pool!

When reusing a directory free space slot and thus finding it on the free space
list, do free it back into the pool!

Update haad-dm branch to haad-dm-base2.

Pull up following revision(s) (requested by reinoud in ticket #5):
	sys/kern/vfs_dirhash.c: revision 1.8
Clarify the dirhash locking protocol and remove unnessiary #ifdef DEBUG
flag.

Pull up following revision(s) (requested by reinoud in ticket #5):
	sys/kern/vfs_dirhash.c: revision 1.7
Protect the dirhash_queue when purging hashed directories on memory
overflow situations.

Pull up following revision(s) (requested by reinoud in ticket #5):
	sys/kern/vfs_dirhash.c: revision 1.6
Remove old KASSERTS that were commented out. Since the dirhash structure is
considered part of the vnode/*_node structure it sure has to be locked or
the code using it is playing russian roulette.

Pull up following revision(s) (requested by reinoud in ticket #5):
	sys/kern/vfs_dirhash.c: revision 1.5
Cleanup dirhash and make use of the standard hash32_strn() instead of the
handcrafted one.
Note it uses hash32_strn() since arguments can be passed from namei
arguments and thus don't have to be null terminated.

Clarify the dirhash locking protocol and remove unnessiary #ifdef DEBUG
flag.

Protect the dirhash_queue when purging hashed directories on memory
overflow situations.

Remove old KASSERTS that were commented out. Since the dirhash structure is
considered part of the vnode/*_node structure it sure has to be locked or
the code using it is playing russian roulette.

Cleanup dirhash and make use of the standard hash32_strn() instead of the
handcrafted one.

Note it uses hash32_strn() since arguments can be passed from namei
arguments and thus don't have to be null terminated.

Remove old sysctl numbers not used anymore.

Make some variables static that ought to have been from the start.

Add sysctl's using CTL_CREATE to query and set the memory use of the
generic vfs dirhash code.

Sync with HEAD.

Sync with HEAD.

Sync with HEAD.

file vfs_dirhash.c was added on branch haad-dm on 2008-10-19 22:17:29 +0000

file vfs_dirhash.c was added on branch wrstuden-revivesa on 2008-10-10 22:34:14 +0000

file vfs_dirhash.c was added on branch mjf-devfs2 on 2008-10-05 20:11:32 +0000

Add generic FS agnostic directory hashing support. Currently only in use by
UDF. Future users could be msdosfs, ufs, nilfs2 (when ready), cd9660 etc.

Note that its not the same as UFS's DIRHASH support; UFS would need a good
cleanup/splitout of directory operations to adopt to this new directory
hashing support since most directory operations are interweaved with the
vnops itself. This is a TODO.