linux.git/fs/gfs2/locking.c, branch master

GFS2: Merge lock_dlm module into GFS2

2009-03-24T11:21:14+00:00

This is the big patch that I've been working on for some time
now. There are many reasons for wanting to make this change
such as:
 o Reducing overhead by eliminating duplicated fields between structures
 o Simplifcation of the code (reduces the code size by a fair bit)
 o The locking interface is now the DLM interface itself as proposed
   some time ago.
 o Fewer lookups of glocks when processing replies from the DLM
 o Fewer memory allocations/deallocations for each glock
 o Scope to do further optimisations in the future (but this patch is
   more than big enough for now!)

Please note that (a) this patch relates to the lock_dlm module and
not the DLM itself, that is still a separate module; and (b) that
we retain the ability to build GFS2 as a standalone single node
filesystem with out requiring the DLM.

This patch needs a lot of testing, hence my keeping it I restarted
my -git tree after the last merge window. That way, this has the maximum
exposure before its merged. This is (modulo a few minor bug fixes) the
same patch that I've been posting on and off the the last three months
and its passed a number of different tests so far.

Signed-off-by: Steven Whitehouse

GFS2: Bring back lvb-related stuff to lock_nolock to support quotas

2009-03-24T11:21:11+00:00

The quota code uses lvbs and this is currently not implemented in
lock_nolock, thereby causing panics when quota is enabled with
lock_nolock. This patch adds the relevant bits.

Signed-off-by: Abhijith Das 
Signed-off-by: Steven Whitehouse

[GFS2] Fix ordering of args for list_add

2008-06-27T08:39:34+00:00

The patch to remove lock_nolock managed to get the arguments
of this list_add backwards. This fixes it.

Signed-off-by: Steven Whitehouse

[GFS2] No lock_nolock

2008-06-27T08:39:28+00:00

This patch merges the lock_nolock module into GFS2 itself. As well as removing
some of the overhead of the module, it also means that its now impossible to
build GFS2 without a lock module (which would be a pointless thing to do
anyway).

We also plan to merge lock_dlm into GFS2 in the future, but that is a more
tricky task, and will therefore be a separate patch.

Signed-off-by: Steven Whitehouse 
Cc: David Teigland

[GFS2] Export lm_interface to kernel headers

2006-09-19T12:45:18+00:00

lm_interface.h has a few out of the tree clients such as GFS1
and userland tools.

Right now, these clients keeps a copy of the file in their build tree
that can go out of sync.

Move lm_interface.h to include/linux, export it to userland and
clean up fs/gfs2 to use the new location.

Signed-off-by: Fabio M. Di Nitto 
Signed-off-by: Steven Whitehouse

[GFS2] Use void * instead of typedef for locking module interface

2006-09-08T14:17:58+00:00

As requested by Jan Engelhardt, this removes the typedefs in the
locking module interface and replaces them with void *. Also
since we are changing the interface, I've added a few consts
as well.

Cc: Jan Engelhardt 
Cc: David Teigland 
Signed-off-by: Steven Whitehouse

[GFS2] Remove one typedef

2006-09-07T19:50:20+00:00

This removes one of the typedefs from the locking interface. It
is replaced by a forward declaration of the gfs2 superblock. The
other two are not so easy to solve since in their case, they
can refer to one of two possible structures.

Cc: David Teigland 
Cc: Jan Engelhardt 
Signed-off-by: Steven Whitehouse

[GFS2] Tidy up locking code

2006-09-04T13:49:55+00:00

As per Jan Engelhardt's second email, this removes some unused code,
and fixes up indenting in various places.

Cc: Jan Engelhardt 
Signed-off-by: Steven Whitehouse

[GFS2] Update copyright, tidy up incore.h

2006-09-01T15:05:15+00:00

As per comments from Jan Engelhardt  this
updates the copyright message to say "version" in full rather than
"v.2". Also incore.h has been updated to remove forward structure
declarations which are not required.

The gfs2_quota_lvb structure has now had endianess annotations added
to it. Also quota.c has been updated so that we now store the
lvb data locally in endian independant format to avoid needing
a structure in host endianess too. As a result the endianess
conversions are done as required at various points and thus the
conversion routines in lvb.[ch] are no longer required. I've
moved the one remaining constant in lvb.h thats used into lm.h
and removed the unused lvb.[ch].

I have not changed the HIF_ constants. That is left to a later patch
which I hope will unify the gh_flags and gh_iflags fields of the
struct gfs2_holder.

Cc: Jan Engelhardt 
Signed-off-by: Steven Whitehouse

[GFS2] Fix gfs_ prefix in locking.c

2006-08-07T15:12:30+00:00

The previous patch didn't change all the gfs_ to gfs2_ so
this is the remainder.

Signed-off-by: Steven Whitehouse