OST_CONNECTs to complete at startup) on HEAD

some patches fix for lustre in FC3

b_cmobd_merge should not be used for any further development or testing!

cMD_PRE_CMD_SMASH are the relevant tags.

The pre-smashing contents of HEAD will be committed by yury into b_cmd as a
merge of the two branches.  These will be stabilized on b_cmd and eventually
landed onto HEAD.

b=3043, b=3258, b=3219, b=2410

Protect conn_cnt check and update with exp_lock in
target_handle_connect.

Add a test to replay since, and add an OBD_FAIL style macro to create
a race condition in a specific location called OBD_RACE.

- remove extN/ files

* bug fixes
 - Fix ldlm_lock_match on the MDS to avoid matching remote locks (592)
 - Fix fsfilt_extN_readpage() to read a full page of directory
   entries, or fake the remainder if PAGE_SIZE != blocksize (500)
 - Avoid extra mdc_getattr() in ll_intent_lock when possible (534, 604)
 - Fix imbalanced LOV object allocation and out-of-bound access (469)
 - Most intent operations were removed, in favour of a new RPC mode
   that does a single RPC to the server and bypasses most of the VFS
 - All LDLM resource ID arrays were removed in favour of ldlm_res_id
 - Aggressively cancel local locks on DLM servers
 - mds_reint_unlink sends EA to the client if it's the last nlink.
   client uses that EA to unlink OST objects.
 - mds_reint_{rename,unlink,link} were rewritten to take ordered locks
 - recursive symlinks were fixed (440)
 - fixed NULL deref in DEBUG_REQ
 - filter_update_lastobjid no longer calls sync, which annoyed extN
 - fixed multi-client small-writes to a single file problem (445)
 - fixed mtime updates during file writes (607)
 - fixed vector writes on obdfilter causing problems when ENOSPC (670)
 - fixed bug in obd_brw_read/write() (under guise of testing 367)
 - fixed Linux OST size reporting problem (444, 656)
 - OST now updates object mtime with writes or setattr (607, 619)
 - client verifies file size before zeroing page past EOF (445)
 - OST now writes last allocated objid to disk with allocation (108)
 - LOV on echo now works (409)
 * protocol changes
 - mds_reint_unlink sends a new buffer, with the EA included.  this
   buffer is only valid if body->valid & OBD_MD_FLEASIZE, which is only
   set if a regular file was being unlinked, and it was the last link
 - use PtlGet from the target for bulk writes (315)
 - OST now updates object mtime with writes or setattr (607, 619)
 - LDLM now has a grant-time callback to revalidate locked items, if
   necessary (604)
 - Many MDS operations were reorganized to combat race conditions
* other changes
 - Merge b_intel branch (updated lprocfs code) - now at /proc/fs/lustre
 - configure check to avoid gcc version 2.96 20000731-2.96-98 (606)

* Big doc comment for l_wait_event.
* Only fire the timeout once from l_wait_event.
* Made timeout and the recovery-upcall path configurable via sysctl.
* Added OBD_FAIL_OSC codes for simulating simple client failure.
* Tentative rewiring of recovd into client connections, needs more thought
  and then more typing. We do fire the upcall, at least.
* Use the provided cluuid instead of NULL wherever it's handy already.
* Protect (feebly) against waiting for recovery that will never happen,
  in sync_io_timeout.
* Add timeouts to bulk operations in MDS and OST -- a recovery stub is now
  triggered, but nothing else.
* Document the unpleasant business in osc_brw_{read,write} as pertains to
  errors in the callbacks and cleanup of descriptors.
* Remove now-unused ptlrpc_check_bulk_{sent,received}.

	the older 2.4.9 kernel (i_blkbits does not exist there), and add
	in the missing fixup for i_diskblocks
ALL: add in test framework for simulating errors, dropped packets, etc.
	does not yet integrate with the ext3 on-disk error interface

  depended on it.
- Added code to drop packets based on /proc/sys/obd/drop_packet
- De-tabbified and switched a bunch of code to use RETURN and GOTO

- removed unused obd_print_entry code
- fixed the llmount.sh debug level default
- minor debugging cleanups
- moved mdc_reint to where it's actually used

'CERROR's.  Also contains a lot of cleanup, removing things like __FUNCTION__
from CDEBUG and CERROR statements which already display that information.

- started using CERROR, which goes both to the console and the ringbuffer,
  instead of printk

        * include/linux/obd_class.h: added obd_devicename member to
          struct obd_device (name is either ptr to dentry or uuid).
        * ext2obd/ext2_obd.c: setup() converts dentry into rdev number.
          class/class_obd.c: setup() converts name into obd_device dentry
          class/obdcontrol: setup() passes /dev/obd name into ioctl
          (used to be rdev number and if invalid rdev number was passed
           old ext2_obd.c would crash kernel when trying to read superblock).
        * class/obdcontrol: added "status, procsys, script, insmod, rmmod,
          lsmod, shell and close" commands for obdcontrol. This allows
          easier scripting from within obdcontrol. Introduced ability to
          maintain multiple open obd devices from a single obdcontrol
          session.  Device command toggles device context. Obdcontrol
          maintains multiple open file handles. "script <file>" command is
          useful for "sourcing" scripts without leaving obdcontrol.
          shell <command> allows any shell command to be executed from
          within obdcontrol.
        * class/proc_lustre.c: added support for /proc/lustre/obd/<n>/status.
          These are read-only /proc entries that track /dev/obd<n>
          internal state.
        * obdtrace/* & include/linux/obd_class.h: obd_trace a logical obd
          module useful for tracing and performance debug of the Lustre
          obd protocol stack. obdtrace module creates
          /proc/lustre/obd/<n>/stats file. Reading this /proc file shows
          per OBD performance statistics.  Any write to this /proc file
          resets the counters for this OBD.
        * scripts/obdtrace_demo.scr: Example of obdtrace that
          takes advantage of new obdcontrol functionality.
        * doc/obdtrace_demo.txt: shows obdtrace capabilities.

ext2obd works (except _write and _read which aren't that important).

    inodes from the list here, but instead let flush_reqs do it, which also
    does an iput() on the inode.
others: clean up for printk() when EXT2_OBD_DEBUG is not set

    Many bugfixes
    INOFS added
    SNAP added

   See ChangeLog for details

Improved configuration scripts

Removed compiler warnings from re-defining ext2_error