r=alex
d=17

fix design defect. plugins are needed struct inode to check its flags

r=wangdi

small fixes to provide correct operation order, fix double messages due to using both RETURN and EXIT macro, always initialize several s_ops, plugin framework was added.

r=wangdi

smfs fixes to make it works in 2.6.7 kernel and in conformity with smfs hld/dld documents.

- changed mds_alloc_inode_sid() to allocate lustre_id in memory if there is
no passed one. This makes mds stuff do not use lustre_id allocated on stack
if there is only need to allocate inode sid without using it later. This
makes stack consumption smaller by 40 bytes in each such a case.

- in mds_setup() whrn comparing strings passed from userspace use strncmp()
- root lustre_id should be set up also in cases when there is no profile.
- making do not use lustre_id allocated on stack in places where it is possible.

- moving mds_finish_transno() calling to place where dput() for dchild is
already called to make sure, that unlink op got to current transaction.

- lots of changes in lconf. MDSDEV stuff is changed substantionaly. Removing
bugs prone code, replacing it by new one about setting up MDS, LMV, etc.
Added more verbose messages about MDS, LMV configuration. Removed redundant
stuff about forming mount options. It now is moved to function and be used from
few places.

- fixes in CMOBD and COBD objects about using LMV.

- fixed double client_ref adding to LMV, what led to double client config
writing on MDS setup.

 - add a flag in lustre_msg which indicate message type
 - add a security descriptor into most of messages send to MDSs, which
   include the uid, supplementary groups array etc.
 - add group hash
 - MDS retrive local groups database through upcall, and set/merge with
   which sent from client based on policies (here not totally finished)
 - move root_squash test into separate sanity-sec.sh

- lsmfs.sh changes to make it usable for testing smfs with no log maintaining.

2)update snapfs on smfs
3)add snap_utils on lctl.c
4)some minor fix on smfs

2)some minor fix for building 2.6

2)some cleanup in smfs

2)remove clonefs in llite, we do not need them now
3)add snap_dot_info in snap_super_info

r=adilger

- replay of unlink. landed for testing on china cluster

2)add clientfsoption in lmc and lconf
3)some fix in cobd for cache miss handler

2 some fix for regular file cow

2)add snap cow for obdfilter
3)some fix in smfs_cow

  move primary cowed inode to cowed dir.
2)move MSG_CONNECT_INITIAL check before obd_uuid equal check, otherwise,
  it will bring some problems in cmobd_setup.
3)set imp_conn_cnt to 0 in ptlrpc_disconnect_import