Merge b_md into HEAD
* 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)