Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 971 (dynamic volume management)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971

This is plain wrong. this must always be the xlator that receives the callback.
Use cookie to access the child subvolume on which the fop was issued.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1410 (nfs uses this for child translator during frame creation)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1410

..for fixing mem-accounting for NFS in mainline.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1280 (gf_mem_set_acct_info goes into spinlock busyloop, never returns)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1280

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 1274 (nfs fails to start)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1274

nfsx has followed traditional approach of exporting whole volumes
as NFS exports. The Platform requires and some users have approached us for
introducing exports of only specific directories instead of full Gluster
volumes. This commit introduces this support through two nfsx options:

Option 1:

=========
option nfs3.<volume-name>.export-dir <subdir1-in-vol>,<subdir2-in-vol>,..<subdirN-in-vol>

export-dir will allow the export of a particular dir as a single export
by itself. For eg.:

volume posix
        type storage/posix
        option directory /export/
end-volume

volume posix-ac
        type features/access-control
        subvolumes posix
end-volume

volume nfs
        type nfs/server
        subvolumes posix-ac
        option rpc-auth.addr.allow *
        option nfs3.posix-ac.export-dir /homes/shehjart
end-volume

A comma separate list of sub-directories will set up those dirs as separated exports.
At the nfs client, the mount command will be:

$ mount <nfsserver>:/posix-ac/homes/shehjart /mnt

Option 2:
=========
option nfs3.<volume-name>.export-volumes <on|off>

There can be situations where users only want the directory level
exports and require that volume exports be completely disabled. The
above option allows us to do this. By default, volume exports are
enabled. From the earlier example, replacing <volume-name> with
posix-ac, will disable mounting of the posix-ac volume as a whole.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 989 (Support directory exports in nfsx)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=989

Introduces two new options:

1. nfs3.*.trusted-write: Forces UNSTABLE writes to return STABLE to NFS
clients to prevent the clients from sending a COMMIT. STABLE writes
are still handled in a sync manner and so are COMMITs if they're sent
at all.

2. nfs3.*.trusted-sync: Forces all WRITEs and COMMITs to return STABLE
return flags to NFS clients to avoid the overhead of STABLE writes, and
COMMITs that follow UNSTABLE writes. This includes the trusted-write
functionality. In addition to the trusted-write, it also writes
STABLE writes in an UNSTABLE manner.

Both violate the NFS protocol but allow better write perf in most
configurations. Use with caution.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 924 (Slow NFS synchronous writes)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=924

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

Signed-off-by: Vijay Bellur <vijay@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 329 (Replacing memory allocation functions with mem-type functions)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=329

Memory accounting Changes. Thanks to Vinayak Hegde and Csaba Henk for their
contributions.

Signed-off-by: Vijay Bellur <vijay@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 329 (Replacing memory allocation functions with mem-type functions)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=329

This is not needed anymore and also conflicts with changes being
made for DVM.
Should have been removed with the bug fix for bz 770.

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 770 (NFS Xlator - Crash when both GlusterFS server/NFS Server are in the same file)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=770