tree 4601cf090fbfec31fbd554a27c67c717a7caba4b
parent 272eb01485dda98e3b8910c7c1a53d597616b0a0
author Al Viro <viro@zeniv.linux.org.uk> 1230619701 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1230764863 -0500

nfsd/create race fixes, infrastructure

new helpers - insert_inode_locked() and insert_inode_locked4().
Hash new inode, making sure that there's no such inode in icache
already.  If there is and it does not end up unhashed (as would
happen if we have nfsd trying to resolve a bogus fhandle), fail.
Otherwise insert our inode into hash and succeed.

In either case have i_state set to new+locked; cleanup ends up
being simpler with such calling conventions.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>