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2011-01-06pnfs: add CB_LAYOUTRECALL handlingFred Isaman4-20/+194
This is the heart of the wave 2 submission. Add the code to trigger drain and forget of any afected layouts. In addition, we set a "barrier", below which any LAYOUTGET reply is ignored. This is to compensate for the fact that we do not wait for outstanding LAYOUTGETs to complete as per section 12.5.5.2.1 of RFC 5661. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: CB_LAYOUTRECALL xdr codeFred Isaman3-1/+93
This is the xdr decoding for CB_LAYOUTRECALL. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: change lo refcounting to atomic_tFred Isaman2-24/+28
This will be required to allow us to grab reference outside of i_lock. While we are at it, make put_layout_hdr take the same argument as all the related functions. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: check that partial LAYOUTGET return is ignoredFred Isaman1-0/+11
Either a bad server reply, or our ignoring of multiple array segments in a reply, can cause a reply to not meet our requirements. Ensure that we ignore such replies. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: add layout to client list before sending rpcFred Isaman1-8/+19
Since this list will be used to search for layouts to recall, this is necessary to avoid a race where the recall comes in, sees there is nothing in the client list, and prepares to return NOMATCHING, while the LAYOUTGET gets processed before the recall updates the stateid. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: serialize LAYOUTGET(openstateid)Fred Isaman4-10/+27
We shouldn't send a LAYOUTGET(openstateid) unless all outstanding RPCs using the previous stateid are completed. This requires choosing the stateid to encode earlier, so we can abort if one is not available (we want to use the open stateid, but a LAYOUTGET is already out using it), and adding a count of the number of outstanding rpc calls using layout state (which for now consist solely of LAYOUTGETs). Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: layoutget rpc code cleanupFred Isaman1-9/+10
No functional changes, just some code minor code rearrangement and comments. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: change how lsegs are removed from layout listFred Isaman3-44/+96
This is to prepare the way for sensible io draining. Instead of just removing the lseg from the list, we instead clear the VALID flag (preventing new io from grabbing references to the lseg) and remove the reference holding it in the list. Thus the lseg will be removed once any io in progress completes and any references still held are dropped. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: change layout state seqlock to a spinlockFred Isaman3-61/+27
This prepares for future changes, where the layout state needs to change atomically with several other variables. In particular, it will need to know if lo->segs is empty, as we test that instead of manipulating the NFS_LAYOUT_STATEID_SET bit. Moreover, the layoutstateid is not really a read-mostly structure, as it is written almost as often as it is read. The behavior of pnfs_get_layout_stateid is also slightly changed, so that it no longer changes the stateid. Its name is changed to +pnfs_choose_layoutget_stateid. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: add prefix to struct pnfs_layout_hdr fieldsFred Isaman3-56/+56
Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: add prefix to struct pnfs_layout_segment fieldsFred Isaman3-39/+39
While we are renaming all the fields, change lo->state to lo->plh_flags. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: remove unnecessary field lgp->statusFred Isaman1-2/+1
Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: fix incorrect comment in destroy_lsegFred Isaman1-1/+1
Comment references get_layout_hdr_locked, which never existed in submitted code. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS rename client back channel transport fieldAndy Adamson1-6/+6
Differentiate from server backchannel Signed-off-by: Andy Adamson <andros@netapp.com> Acked-by: Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS add session back channel drainingAndy Adamson5-15/+85
Currently session draining only drains the fore channel. The back channel processing must also be drained. Use the back channel highest_slot_used to indicate that a callback is being processed by the callback thread. Move the session complete to be per channel. When the session is draininig, wait for any current back channel processing to complete and stop all new back channel processing by returning NFS4ERR_DELAY to the back channel client. Drain the back channel, then the fore channel. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS RPC_AUTH_GSS unsupported on v4.1 back channelAndy Adamson1-0/+3
Signed-off-by: Andy Adamson <andros@netapp.com> Acked-by: Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS refactor nfs_find_client and reference client across callback processingAndy Adamson6-188/+245
Fixes a bug where the nfs_client could be freed during callback processing. Refactor nfs_find_client to use minorversion specific means to locate the correct nfs_client structure. In the NFS layer, V4.0 clients are found using the callback_ident field in the CB_COMPOUND header. V4.1 clients are found using the sessionID in the CB_SEQUENCE operation which is also compared against the sessionID associated with the back channel thread after a successful CREATE_SESSION. Each of these methods finds the one an only nfs_client associated with the incoming callback request - so nfs_find_client_next is not needed. In the RPC layer, the pg_authenticate call needs to find the nfs_client. For the v4.0 callback service, the callback identifier has not been decoded so a search by address, version, and minorversion is used. The sessionid for the sessions based callback service has (usually) not been set for the pg_authenticate on a CB_NULL call which can be sent prior to the return of a CREATE_SESSION call, so the sessionid associated with the back channel thread is not used to find the client in pg_authenticate for CB_NULL calls. Pass the referenced nfs_client to each CB_COMPOUND operation being proceesed via the new cb_process_state structure. The reference is held across cb_compound processing. Use the new cb_process_state struct to move the NFS4ERR_RETRY_UNCACHED_REP processing from process_op into nfs4_callback_sequence where it belongs. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS associate sessionid with callback connectionAndy Adamson3-0/+38
The sessions based callback service is started prior to the CREATE_SESSION call so that it can handle CB_NULL requests which can be sent before the CREATE_SESSION call returns and the session ID is known. Set the callback sessionid after a sucessful CREATE_SESSION. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS implement v4.0 callback_identAndy Adamson4-0/+54
Use the small id to pointer translator service to provide a unique callback identifier per SETCLIENTID call used to identify the v4.0 callback service associated with the clientid. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS do not clear minor version at nfs_client freeAndy Adamson1-13/+9
Resetting the client minor version operations causes nfs4_destroy_callback to fail to shutdown the NFSv4.1 callback service. There is no reason to reset the client minorversion operations when the nfs_client struct is being freed. Remove the minorverion reset and rename the function. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06NFS use svc_create_xprt for NFSv4.1 callback serviceAndy Adamson1-10/+18
The new back channel transport means we call the normal creation routine as well as svc_xprt_put. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04nfsv4: Switch to generic xattr handling codeAneesh Kumar K.V4-37/+44
This patch make nfsv4 use the generic xattr handling code to get the nfsv4 acl. This will help us to add richacl support to nfsv4 in later patches Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04nfs: Set MS_POSIXACL alwaysAneesh Kumar K.V3-2/+16
We want to skip VFS applying mode for NFS. So set MS_POSIXACL always and selectively use umask. Ideally we would want to use umask only when we don't have inheritable ACEs set. But NFS currently don't allow to send umask to the server. So this is best what we can do and this is consistent with NFSv3 Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04NFS: use ERR_CAST()Namhyung Kim1-1/+1
Use ERR_CAST() intead of wierd-looking cast. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04nfs: fix mispelling of idmap CONFIG symbolJ. Bruce Fields1-1/+1
Trivial, but confusing when you're trying to grep through this code.... Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04lockd: double unlock in next_host_state()Dan Carpenter1-1/+0
We unlock again after we goto out. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-04NFS: Don't leak in nfs_proc_symlink()Jesper Juhl1-1/+2
Hi, In fs/nfs/proc.c::nfs_proc_symlink() we will leak memory if either nfs_alloc_fhandle() or nfs_alloc_fattr() returns NULL but the other one doesn't. This patch ensures memory allocated by one when the other fails is always released (this is safe since nfs_free_fattr() and nfs_free_fhandle() both call kfree which deals gracefully with NULL pointers). Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-21NFSv4: Convert a few commas into semicolons...Trond Myklebust2-9/+9
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-21NFS: suppressing showing of default mount port value in /proc fixedStanislav Kinsbursky1-1/+3
Update: added check for zero value as it was before (note: can't simply check mountd_port for positive value because it's typeof unsigned short) Default value for mount server port is set to NFS_UNSPEC_PORT (-1) and will not be changed during parsing mount options for mound data version 6. This default value will be showed for mountport in /proc/mounts always since current default check is for zero value. This small mistake leads to big problem, because during umount.nfs execution from old user-space utils (at least nfs-utils 1.0.9) this value will be used as the server port to connect to. This request will be rejected (since port is 65535) and thus nfs mount point can't be unmounted. Note from Chuck Lever (chuck.lever@oracle.com): this is only possible if /etc/mtab is a link to /proc/mounts. Not all systems have this configuration. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-21nfs4: fix units bug causing hang on recoveryJ. Bruce Fields1-1/+1
Note that cl_lease_time is in jiffies. This can cause a very long wait in the NFS4ERR_CLID_INUSE case. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-21nfs: Take advantage of kmem_cache_zalloc() in nfs_page_alloc()Jesper Juhl1-5/+2
Take advantage of kmem_cache_zalloc() in nfs_page_alloc(). Save a call to memset() and a few bytes. Before: [jj@dragon linux-2.6]$ size fs/nfs/pagelist.o text data bss dec hex filename 1765 0 8 1773 6ed fs/nfs/pagelist.o After: [jj@dragon linux-2.6]$ size fs/nfs/pagelist.o text data bss dec hex filename 1749 0 8 1757 6dd fs/nfs/pagelist.o Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-21NFS: Remove redundant unlikely()Tobias Klauser1-1/+1
IS_ERR() already implies unlikely(), so it can be omitted here. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Remove src_sap and src_len from nlm_lookup_host_info structChuck Lever1-8/+7
Clean up. The contents of the src_sap field is not used in nlm_alloc_host(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Remove nlm_lookup_host()Chuck Lever1-69/+0
Clean up. Remove the now unused helper nlm_lookup_host(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Make nrhosts an unsigned longChuck Lever1-3/+3
Clean up. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Rename nlm_hostsChuck Lever1-8/+8
Clean up. nlm_hosts now contains only server-side entries. Rename it to match convention of client side cache. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Clean up nlmsvc_lookup_host()Chuck Lever3-36/+89
Clean up. Change nlmsvc_lookup_host() to be purpose-built for server-side nlm_host management. This replaces the generic nlm_lookup_host() helper function, just like on the client side. The lookup logic is specialized for server host lookups. The server side cache also gets its own specialized equivalent of the nlm_release_host() function. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Create client-side nlm_host cacheChuck Lever3-14/+77
NFS clients don't need the garbage collection processing that is performed on nlm_host structures. The client picks up an nlm_host at mount time and holds a reference to it until the file system is unmounted. Servers, on the other hand, don't have a precise way to tell when an nlm_host is no longer being used, so zero refcount nlm_host entries are left to expire in the cache after a time. Basically there's nothing holding a reference to an nlm_host between individual server-side NLM requests, but we can't afford the expense of recreating them for every new NLM request from a client. The nlm_host cache adds some lifetime hysteresis to entries in the cache so the next time a particular nlm_host is needed, it's likely to be discovered by a lookup rather than created from whole cloth. With the new implementation, client nlm_host cache items are no longer garbage collected, and are destroyed directly by a new release function specialized for client entries, nlmclnt_release_host(). They are cached in their own data structure, and have their own lookup logic, simplified and specialized for client nlm_host entries. However, the client nlm_host cache still shares reboot recovery logic with the server nlm_host cache. The NSM "peer rebooted" downcall for clients and servers still come through the same RPC call. This is a legacy formal API that would be difficult to alter, and besides, the user space NSM implementation can't tell the difference between peers that are clients or servers. For this reason, the client cache continues to share the nlm_host_mutex (and reboot recovery logic) with the server cache. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Split nlm_release_call()Chuck Lever4-12/+20
The nlm_release_call() function is invoked from both the server and the client side. We're about to introduce a distinct server- and client-side nlm_release_host(), so nlm_release_call() must first be split into a client-side and a server-side version. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Add nlm_destroy_host_locked()Chuck Lever1-8/+11
Refactor the tail of nlm_gc_hosts() into nlm_destroy_host() so that this logic can be used separately from garbage collection. Rename it _locked() to document that it must be called with the hosts cache mutex held. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: Add nlm_alloc_host()Chuck Lever1-45/+65
Refactor nlm_host allocation and initialization into a separate function. This will be the common piece of server and client nlm_host lookup logic after the nlm_host cache is split. Small change: use kmalloc() instead of kzalloc(), as we're overwriting almost all fields in the new nlm_host struct with non-zero values immediately after it is allocated. An added benefit is we now have an explicit reference to each field name where it is initialized (for all you cscope fans out there). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: reorganize nlm_host_rebootedJ. Bruce Fields1-24/+34
Minor reorganization; no change in behavior. This will save some duplicated code after we split the client and server host caches. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> [ cel: Forward-ported to 2.6.37 ] Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16lockd: define host_for_each{_safe} macrosJ. Bruce Fields1-52/+55
We've got a lot of loops like this, and I find them a little easier to read with the macros. More such loops are coming. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> [ cel: Forward-ported to 2.6.37 ] Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16SUNRPC: New xdr_streams XDR decoder APIChuck Lever8-530/+468
Now that all client-side XDR decoder routines use xdr_streams, there should be no need to support the legacy calling sequence [rpc_rqst *, __be32 *, RPC res *] anywhere. We can construct an xdr_stream in the generic RPC code, instead of in each decoder function. This is a refactoring change. It should not cause different behavior. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16SUNRPC: New xdr_streams XDR encoder APIChuck Lever8-759/+542
Now that all client-side XDR encoder routines use xdr_streams, there should be no need to support the legacy calling sequence [rpc_rqst *, __be32 *, RPC arg *] anywhere. We can construct an xdr_stream in the generic RPC code, instead of in each encoder function. Also, all the client-side encoder functions return 0 now, making a return value superfluous. Take this opportunity to convert them to return void instead. This is a refactoring change. It should not cause different behavior. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16NFS: Remove unused UMNT response data structureChuck Lever1-2/+0
Clean up. The UMNT request has a NULL response. There's no need to set up a mountres structure for it. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16NFS: Avoid return code checking in mount XDR encoder functionsChuck Lever1-20/+15
Clean up. The trend in the other XDR encoder functions is to BUG() when encoding problems occur, since a problem here is always due to a local coding error. Then, instead of a status, zero is unconditionally returned. Update the mount client XDR encoders to behave this way. To finish the update, use the new-style be32_to_cpup() and cpu_to_be32() macros, and compute the buffer sizes using raw integers instead of sizeof(). This matches the conventions used in other XDR functions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16NSM: Avoid return code checking in NSM XDR encoder functionsChuck Lever1-43/+25
Clean up. The trend in the other XDR encoder functions is to BUG() when encoding problems occur, since a problem here is always due to a local coding error. Then, instead of a status, zero is unconditionally returned. Update the NSM XDR encoders to behave this way. To finish the update, use the new-style be32_to_cpup() and cpu_to_be32() macros, and compute the buffer sizes using raw integers instead of sizeof(). This matches the conventions used in other XDR functions Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16NFS: Squelch compiler warning in decode_getdeviceinfo()Chuck Lever1-1/+1
Clean up. .../linux/nfs-2.6/fs/nfs/nfs4xdr.c: In function ‘decode_getdeviceinfo’: .../linux/nfs-2.6/fs/nfs/nfs4xdr.c:5008: warning: comparison between signed and unsigned integer expressions Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2010-12-16NFS: Simplify ->decode_dirent() calling sequenceChuck Lever6-41/+59
Clean up. The pointer returned by ->decode_dirent() is no longer used as a pointer. The only call site (xdr_decode() in fs/nfs/dir.c) simply extracts the errno value encoded in the pointer. Replace the returned pointer with a standard integer errno return value. Also, pass the "server" argument as part of the nfs_entry instead of as a separate parameter. It's faster to derive "server" in nfs_readdir_xdr_to_array() since we already have the directory's inode handy. "server" ought to be invariant for a set of entries in the same directory, right? The legacy versions of decode_dirent() don't use "server" anyway, so it's wasted work for them to derive and pass "server" for each entry. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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