CVS log for pvfs2/src/io/buffer/state.c
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revert style changes back to previous versions.

run maint/pvfs2indent-80col.sh on all .c files to correct style :)

Reverse merge from trunk to lockd-branch...

reverse merge of trunk to branch

Includes reverse merges from trunk
in addition, it includes fixes for readdir and readdirplus to have a variable length
number of directory entries passed in from client-core using a trailer page (currently).
However, there is nothing that prevents us from sharing those pages with the kernel using vmap
and friends which is the next logical step.
So client-core now does a readdir/readdirplus and writev's the trailer page (which is essentially
an encoded version of the readdir/readdirplus response) to the kmod.
The kernel module decodes that and copies it to the user-space app (which issued the getdents/getdents_plus
system call)
Added/edited the getdents.c test program in the test/posix sub directory to issue
getdents/getdents64/getdents_plus/getdents64_plus system calls
Also fixed a critical bug that was somehow never triggered in readdir if the buffer size
provided by glibc/user was not sufficient enough and we advance the f_pos token beyond where we stopped.

remove some duplicate declarations

fixes to small io stuff to get test-zero-fill working again.  Also committing updates from HEAD to make things easier for merge.

* malloc.h is obsolete in freebsd, check for it
* No error.h in freebsd
* linux allows Lu,Lx, and Ld to be interchangeable with llu,llx, and
lld.  Other platforms (solaris, bsd) don't.  Replaced all the L*
with ll*.
* bsd doesn't have mntent.h.  use fstab.h and our own funcs.
* bsd doesn't know about ssize_t.  Use size_t instead.
* bsd doesn't have asm errnos.  Check for each of those
errno macros and if not defined define to -1
* check for db3/db.h db4/db.h header if db path is specified using
--with-db
* darwin has aio support builtin, doesn't need -lrt
* remove kernel stuff in pvfs2-types.h that sets WORDSIZE.  gcc
defines __LP64__ on archs with 64bit longs so we use that instead.
* darwin's open doesn't accept O_LARGEFILE.  off_t is an int64 by
default.  define O_LARGEFILE if it hasn't been.
* need to run ranlib on darwin after libpvfs2.a gets installed to regenerate
table of contents

Changes to the buffer code:
    1) Simplify the concurrency control in the buffer code. The upper
       layer is responsible for the write-sharing control.
    2) Separate cache mangement code from other code. "ncac-lru.c" is
       for LRU policy. "ncac-arc" is for ARC policy which is added soon.
    3) Bug fixes in the list access.

Still working on it for writes and more testing.

some warning cleanups (at least on ppc)

bug fix.
  -- All extents associated with a same Trove request were not linked
     correctly for more than two extents.

some warning removals

Initial buffer cache implementation on top of Trove.