linux.git/drivers/md/dm-crypt.c, branch v2.6.22

dm crypt: add null iv

2007-05-09T19:30:46+00:00

Add a new IV generation method 'null' to read old filesystem images created
with SuSE's loop_fish2 module.

Signed-off-by: Ludwig Nussel 
Acked-By: Christophe Saout 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dm crypt: use smaller bvecs in clones

2007-05-09T19:30:46+00:00

Allocate smaller clones

With the previous dm-crypt fixes, there is no need for the clone bios to have
the same bvec size as the original - we just need to make them big enough for
the remaining number of pages.  The only requirement is that we clear the
"out" index in convert_context, so that crypt_convert starts storing data at
the right position within the clone bio.

Signed-off-by: Olaf Kirch 
Signed-off-by: Alasdair G Kergon 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dm crypt: fix remove first_clone

2007-05-09T19:30:46+00:00

Get rid of first_clone in dm-crypt

This gets rid of first_clone, which is not really needed.  Apparently, cloned
bios used to share their bvec some time way in the past - this is no longer
the case.  Contrarily, this even hurts us if we try to create a clone off
first_clone after it has completed, and crypt_endio has destroyed its bvec.

Signed-off-by: Olaf Kirch 
Signed-off-by: Alasdair G Kergon 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dm crypt: fix avoid cloned bio ref after free

2007-05-09T19:30:46+00:00

Do not access the bio after generic_make_request

We should never access a bio after generic_make_request - there's no guarantee
it still exists.

Signed-off-by: Olaf Kirch 
Signed-off-by: Alasdair G Kergon 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dm crypt: fix call to clone_init

2007-05-09T19:30:46+00:00

Call clone_init early

We need to call clone_init as early as possible - at least before call
bio_put(clone) in any error path.  Otherwise, the destructor will try to
dereference bi_private, which may still be NULL.

Signed-off-by: Olaf Kirch 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

dm crypt: disable barriers

2007-05-09T19:30:46+00:00

Disable barriers in dm-crypt because of current workqueue processing can
reorder requests.

This must be addresed later but for now disabling barriers is needed to
prevent data corruption.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[BLOCK] Don't pin lots of memory in mempools

2007-04-30T07:08:17+00:00

Currently we scale the mempool sizes depending on memory installed
in the machine, except for the bio pool itself which sits at a fixed
256 entry pre-allocation.

There's really no point in "optimizing" this OOM path, we just need
enough preallocated to make progress. A single unit is enough, lets
scale it down to 2 just to be on the safe side.

This patch saves ~150kb of pinned kernel memory on a 32-bit box.

Signed-off-by: Jens Axboe

[PATCH] dm: map and endio symbolic return codes

2006-12-08T16:29:09+00:00

Update existing targets to use the new symbols for return values from target
map and end_io functions.

There is no effect on behaviour.

Test results:
Done build test without errors.

Signed-off-by: Kiyoshi Ueda 
Signed-off-by: Jun'ichi Nomura 
Signed-off-by: Alasdair G Kergon 
Cc: dm-devel@redhat.com
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] LOG2: Implement a general integer log2 facility in the kernel

2006-12-08T16:28:51+00:00

This facility provides three entry points:

	ilog2()		Log base 2 of unsigned long
	ilog2_u32()	Log base 2 of u32
	ilog2_u64()	Log base 2 of u64

These facilities can either be used inside functions on dynamic data:

	int do_something(long q)
	{
		...;
		y = ilog2(x)
		...;
	}

Or can be used to statically initialise global variables with constant values:

	unsigned n = ilog2(27);

When performing static initialisation, the compiler will report "error:
initializer element is not constant" if asked to take a log of zero or of
something not reducible to a constant.  They treat negative numbers as
unsigned.

When not dealing with a constant, they fall back to using fls() which permits
them to use arch-specific log calculation instructions - such as BSR on
x86/x86_64 or SCAN on FRV - if available.

[akpm@osdl.org: MMC fix]
Signed-off-by: David Howells 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Herbert Xu 
Cc: David Howells 
Cc: Wojtek Kaniewski 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

2006-12-07T17:05:15+00:00

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (48 commits)
  [NETFILTER]: Fix non-ANSI func. decl.
  [TG3]: Identify Serdes devices more clearly.
  [TG3]: Use msleep.
  [TG3]: Use netif_msg_*.
  [TG3]: Allow partial speed advertisement.
  [TG3]: Add TG3_FLG2_IS_NIC flag.
  [TG3]: Add 5787F device ID.
  [TG3]: Fix Phy loopback.
  [WANROUTER]: Kill kmalloc debugging code.
  [TCP] inet_twdr_hangman: Delete unnecessary memory barrier().
  [NET]: Memory barrier cleanups
  [IPSEC]: Fix inetpeer leak in ipv4 xfrm dst entries.
  audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=n
  audit: Add auditing to ipsec
  [IRDA] irlan: Fix compile warning when CONFIG_PROC_FS=n
  [IrDA]: Incorrect TTP header reservation
  [IrDA]: PXA FIR code device model conversion
  [GENETLINK]: Fix misplaced command flags.
  [NETLIK]: Add a pointer to the Generic Netlink wiki page.
  [IPV6] RAW: Don't release unlocked sock.
  ...