Commit Graph

6 Commits

Author SHA1 Message Date
Trond Myklebust
e6dfa553cf NFSv4: Remove obsolete state_owner and lock_owner semaphores
OPEN, CLOSE, etc no longer need these semaphores to ensure ordering of
 requests.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-10-18 14:20:13 -07:00
Trond Myklebust
cee54fc944 NFSv4: Add functions to order RPC calls
NFSv4 file state-changing functions such as OPEN, CLOSE, LOCK,... are all
 labelled with "sequence identifiers" in order to prevent the server from
 reordering RPC requests, as this could cause its file state to
 become out of sync with the client.

 Currently the NFS client code enforces this ordering locally using
 semaphores to restrict access to structures until the RPC call is done.
 This, of course, only works with synchronous RPC calls, since the
 user process must first grab the semaphore.
 By dropping semaphores, and instead teaching the RPC engine to hold
 the RPC calls until they are ready to be sent, we can extend this
 process to work nicely with asynchronous RPC calls too.

 This patch adds a new list called "rpc_sequence" that defines the order
 of the RPC calls to be sent. We add one such list for each state_owner.
 When an RPC call is ready to be sent, it checks if it is top of the
 rpc_sequence list. If so, it proceeds. If not, it goes back to sleep,
 and loops until it hits top of the list.
 Once the RPC call has completed, it can then bump the sequence id counter,
 and remove itself from the rpc_sequence list, and then wake up the next
 sleeper.

 Note that the state_owner sequence ids and lock_owner sequence ids are
 all indexed to the same rpc_sequence list, so OPEN, LOCK,... requests
 are all ordered w.r.t. each other.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-10-18 14:20:12 -07:00
Trond Myklebust
8d0a8a9d0e [PATCH] NFSv4: Clean up nfs4 lock state accounting
Ensure that lock owner structures are not released prematurely.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22 16:07:42 -04:00
Reuben Farrelly
c56c275022 [PATCH] NFSv4: Fix build warning
From: Reuben Farrelly <reuben-lkml@reub.net>

 With gcc-4.0:

 fs/nfs/nfs4proc.c:2976: error: static declaration of
 'nfs4_file_inode_operations' follows non-static declaration
 fs/nfs/nfs4_fs.h:179: error: previous declaration of
 'nfs4_file_inode_operations' was here

 Signed-off-by: Andrew Morton <akpm@osdl.org>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22 16:07:29 -04:00
J. Bruce Fields
6b3b5496d7 [PATCH] NFSv4: Add {get,set,list}xattr methods for nfs4
Add {get,set,list}xattr methods for nfs4.  The new methods are no-ops, to be
 used by subsequent ACL patch.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22 16:07:10 -04:00
Trond Myklebust
4ce79717ce [PATCH] NFS: Header file cleanup...
- Move NFSv4 state definitions into a private header file.
 - Clean up gunk in nfs_fs.h

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-06-22 16:07:06 -04:00