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2009-09-15nfsd41: Backchannel: Add sequence arguments to callback RPC argumentsRicardo Labiaga
Follow the model we use in the client. Make the sequence arguments part of the regular RPC arguments. None of the callbacks that are soon to be implemented expect results that need to be passed back to the caller, so we don't define a separate RPC results structure. For session validation, the cb_sequence decoding will use a pointer to the sequence arguments that are part of the RPC argument. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> [define struct nfsd4_cb_sequence here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15nfsd41: Backchannel: callback infrastructureAndy Adamson
Keep the xprt used for create_session in cl_cb_xprt. Mark cl_callback.cb_minorversion = 1 and remember the client provided cl_callback.cb_prog rpc program number. Use it to probe the callback path. Use the client's network address to initialize as the callback's address as expected by the xprt creation routines. Define xdr sizes and code nfs4_cb_compound header to be able to send a null callback rpc. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> [get callback minorversion from fore channel's] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: change bc_sock to bc_xprt] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [pulled definition for cl_cb_xprt] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: set up backchannel's cb_addr] [moved rpc_create_args init to "nfsd: modify nfsd4.1 backchannel to use new xprt class"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15nfsd4: use common rpc_cred for all callbacksJ. Bruce Fields
Callbacks are always made using the machine's identity, so we can use a single auth_generic credential shared among callbacks to all clients and let the rpc code take care of the rest. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15nfsd4: allow nfs4 state startup to failJ. Bruce Fields
The failure here is pretty unlikely, but we should handle it anyway. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronousTrond Myklebust
Otherwise, the upcall is going to be synchronous, which may not be what the caller wants... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15nfsd4: fix null dereference creating nfsv4 callback clientJ. Bruce Fields
On setting up the callback to the client, we attempt to use the same authentication flavor the client did. We find an rpc cred to use by calling rpcauth_lookup_credcache(), which assumes that the given authentication flavor has a credentials cache. However, this is not required to be true--in particular, auth_null does not use one. Instead, we should call the auth's lookup_cred() method. Without this, a client attempting to mount using nfsv4 and auth_null triggers a null dereference. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-13nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definitionBenny Halevy
Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-13nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannelAlexandros Batsakis
[sunrpc: change idle timeout value for the backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.NeilBrown
The extra call to cache_revisit_request in cache_fresh_unlocked is not needed, as should have been fairly clear at the time of commit 4013edea9a0b6cdcb1fdf5d4011e47e068fd6efb If there are requests to be revisited, then we can be sure that CACHE_PENDING is set, so the second call is sufficient. So remove the first call. Then remove the 'new' parameter, then remove the return value for cache_fresh_locked which is only used to provide the value for 'new'. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11sunrpc/cache: change cache_defer_req to return -ve error, not boolean.NeilBrown
As "cache_defer_req" does not sound like a predicate, having it return a boolean value can be confusing. It is more consistent to return 0 for success and negative for error. Exactly what error code to return is not important as we don't differentiate between reasons why the request wasn't deferred, we only care about whether it was deferred or not. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11nfsd41: sunrpc: Added rpc server-side backchannel handlingRahul Iyer
When the call direction is a reply, copy the xid and call direction into the req->rq_private_buf.head[0].iov_base otherwise rpc_verify_header returns rpc_garbage. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [get rid of CONFIG_NFSD_V4_1] [sunrpc: refactoring of svc_tcp_recvfrom] [nfsd41: sunrpc: create common send routine for the fore and the back channels] [nfsd41: sunrpc: Use free_page() to free server backchannel pages] [nfsd41: sunrpc: Document server backchannel locking] [nfsd41: sunrpc: remove bc_connect_worker()] [nfsd41: sunrpc: Define xprt_server_backchannel()[ [nfsd41: sunrpc: remove bc_close and bc_init_auto_disconnect dummy functions] [nfsd41: sunrpc: eliminate unneeded switch statement in xs_setup_tcp()] [nfsd41: sunrpc: Don't auto close the server backchannel connection] [nfsd41: sunrpc: Remove unused functions] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: change bc_sock to bc_xprt] [nfsd41: sunrpc: move struct rpc_buffer def into a common header file] [nfsd41: sunrpc: use rpc_sleep in bc_send_request so not to block on mutex] [removed cosmetic changes] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [sunrpc: add new xprt class for nfsv4.1 backchannel] [sunrpc: v2.1 change handling of auto_close and init_auto_disconnect operations for the nfsv4.1 backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> [reverted more cosmetic leftovers] [got rid of xprt_server_backchannel] [separated "nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Cc: Trond Myklebust <trond.myklebust@netapp.com> [sunrpc: change idle timeout value for the backchannel] Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Acked-by: Trond Myklebust <trond.myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-10nfsd41: sunrpc: move struct rpc_buffer def into sunrpc.hBenny Halevy
Move struct rpc_buffer's definition into a sunrpc.h, a common, internal header file, in preparation for supporting the nfsv4.1 backchannel. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: sunrpc: #include <linux/net.h> from sunrpc.h] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04nfsd: fix leak on error in nfsv3 readdirJ. Bruce Fields
Note the !dchild->d_inode case can leak the filehandle. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04nfsd: clean up readdirplus encodingJ. Bruce Fields
Make the return from compose_entry_fh() zero or an error, even though the returned error isn't used, just to make the meaning of the return immediately obvious. Move some repeated code out of main function into helper. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04nfsd4: filehandle leak or error exit from fh_compose()J. Bruce Fields
A number of callers (nfsd4_encode_fattr(), at least) don't bother to release the filehandle returned to fh_compose() if fh_compose() returns an error. So, modify fh_compose() to release the filehandle before returning an error. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-03NFSd: Fix filehandle leak in exp_pseudoroot() and nfsd4_path()Trond Myklebust
nfsd4_path() allocates a temporary filehandle and then fails to free it before the function exits, leaking reference counts to the dentry and export that it refers to. Also, nfsd4_lookupp() puts the result of exp_pseudoroot() in a temporary filehandle which it releases on success of exp_pseudoroot() but not on failure; fix exp_pseudoroot to ensure that on failure it releases the filehandle before returning. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-02nfsd: move fsid_type choice out of fh_composeJ. Bruce Fields
More trivial cleanup. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-02nfsd: move some of fh_compose into helper functionsJ. Bruce Fields
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01nfsd41: replace page based DRC with buffer based DRCAndy Adamson
Use NFSD_SLOT_CACHE_SIZE size buffers for sessions DRC instead of holding nfsd pages in cache. Connectathon testing has shown that 1024 bytes for encoded compound operation responses past the sequence operation is sufficient, 512 bytes is a little too small. Set NFSD_SLOT_CACHE_SIZE to 1024. Allocate memory for the session DRC in the CREATE_SESSION operation to guarantee that the memory resource is available for caching responses. Allocate each slot individually in preparation for slot table size negotiation. Remove struct nfsd4_cache_entry and helper functions for the old page-based DRC. The iov_len calculation in nfs4svc_encode_compoundres is now always correct. Replay is now done in nfsd4_sequence under the state lock, so the session ref count is only bumped on non-replay. Clean up the nfs4svc_encode_compoundres session logic. The nfsd4_compound_state statp pointer is also not used. Remove nfsd4_set_statp(). Move useful nfsd4_cache_entry fields into nfsd4_slot. Signed-off-by: Andy Adamson <andros@netapp.com Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01nfsd41: replace nfserr_resource in pure nfs41 responsesAndy Adamson
nfserr_resource is not a legal error for NFSv4.1. Replace it with nfserr_serverfault for EXCHANGE_ID and CREATE_SESSION processing. We will also need to map nfserr_resource to other errors in routines shared by NFSv4.0 and NFSv4.1 Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01nfsd41: use session maxreqs for sequence target and highest slotidAndy Adamson
This fixes a bug in the sequence operation reply. The sequence operation returns the highest slotid it will accept in the future in sr_highest_slotid, and the highest slotid it prefers the client to use. Since we do not re-negotiate the session slot table yet, these should both always be set to the session ca_maxrequests. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01nfsd41: bound forechannel drc size by memory usageAndy Adamson
By using the requested ca_maxresponsesize_cached * ca_maxresponses to bound a forechannel drc request size, clients can tailor a session to usage. For example, an I/O session (READ/WRITE only) can have a much smaller ca_maxresponsesize_cached (for only WRITE compound responses) and a lot larger ca_maxresponses to service a large in-flight data window. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01NFSD: Fix a bug in the NFSv4 'supported attrs' mandatory attributeTrond Myklebust
The fact that the filesystem doesn't currently list any alternate locations does _not_ imply that the fs_locations attribute should be marked as "unsupported". Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-28nfsd41: expand solo sequence checkAndy Adamson
Compounds consisting of only a sequence operation don't need any additional caching beyond the sequence information we store in the slot entry. Fix nfsd4_is_solo_sequence to identify this case correctly. The additional check for a failed sequence in nfsd4_store_cache_entry() is redundant, since the nfsd4_is_solo_sequence call lower down catches this case. The final ce_cachethis set in nfsd4_sequence is also redundant. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27nfsd4: remove ACE4_IDENTIFIER_GROUP flag from GROUP@ entryFrank Filz
RFC 3530 says "ACE4_IDENTIFIER_GROUP flag MUST be ignored on entries with these special identifiers. When encoding entries with these special identifiers, the ACE4_IDENTIFIER_GROUP flag SHOULD be set to zero." It really shouldn't matter either way, but the point is that this flag is used to distinguish named users from named groups (since unix allows a group to have the same name as a user), so it doesn't really make sense to use it on a special identifier such as this.) Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27sunrpc: move the close processing after do recvfrom methodWei Yongjun
sunrpc: "Move close processing to a single place" (d7979ae4a050a45b78af51832475001b68263d2a) moved the close processing before the recvfrom method. This may cause the close processing never to execute. So this patch moves it to the right place. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27nfsd41: renew_client must be called under the state lockBenny Halevy
Until we work out the state locking so we can use a spin lock to protect the cl_lru, we need to take the state_lock to renew the client. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: Do not renew state on error] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: Simplify exit code] Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-25sunrpc: reply AUTH_BADCRED to RPCSEC_GSS with unknown serviceWei Yongjun
When an RPC message is received with RPCSEC_GSS with an unknown service (not RPC_GSS_SVC_NONE, RPC_GSS_SVC_INTEGRITY, or RPC_GSS_SVC_PRIVACY), svcauth_gss_accept() returns AUTH_BADCRED, but svcauth_gss_release() subsequently drops the response entirely, discarding the error. Fix that so the AUTH_BADCRED error is returned to the client. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-25knfsd: Replace lock_kernel with a mutex in nfsd pool stats.Ryusei Yamaguchi
lock_kernel() in knfsd was replaced with a mutex. The later commit 03cf6c9f49a8fea953d38648d016e3f46e814991 ("knfsd: add file to export stats about nfsd pools") did not follow that change. This patch fixes the issue. Also move the get and put of nfsd_serv to the open and close methods (instead of start and stop methods) to allow atomic check and increment of reference count in the open method (where we can still return an error). Signed-off-by: Ryusei Yamaguchi <mandel59@gmail.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Cc: Greg Banks <gnb@fmeh.org> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-24nfsd: Fix unnecessary deny bits in NFSv4 ACLFrank Filz
The group deny entries end up denying tcy even though tcy was just allowed by the allow entry. This appears to be due to: ace->access_mask = mask_from_posix(deny, flags); instead of: ace->access_mask = deny_mask_from_posix(deny, flags); Denying a previously allowed bit has no effect, so this shouldn't affect behavior, but it's ugly. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-24nfsd41: sunrpc: svc_tcp_recv_record()Alexandros Batsakis
Factor functionality out of svc_tcp_recvfrom() to simplify routine Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21nfsd: populate sin6_scope_id on callback address with scopeid from rq_addr ↵Jeff Layton
on SETCLIENTID call When a SETCLIENTID call comes in, one of the args given is the svc_rqst. This struct contains an rq_addr field which holds the address that sent the call. If this is an IPv6 address, then we can use the sin6_scope_id field in this address to populate the sin6_scope_id field in the callback address. AFAICT, the rq_addr.sin6_scope_id is non-zero if and only if the client mounted the server's link-local address. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21nfsd: add support for NFSv4 callbacks over IPv6Jeff Layton
The framework to add this is all in place. Now, add the code to allow support for establishing a callback channel on an IPv6 socket. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21nfsd: convert nfs4_cb_conn struct to hold address in sockaddr_storageJeff Layton
...rather than as a separate address and port fields. This will be necessary for implementing callbacks over IPv6. Also, convert gen_callback to use the standard rpcuaddr2sockaddr routine rather than its own private one. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21nfsd: make nfs4_client->cl_addr a struct sockaddr_storageJeff Layton
It's currently a __be32, which isn't big enough to hold an IPv6 address. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21sunrpc: add common routine for copying address portion of a sockaddrJeff Layton
Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21sunrpc: add routine for comparing addressesJeff Layton
lockd needs these sort of routines, as does the NFSv4 callback code. Move lockd's routines into common code and rename them so that they can be used by others. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21Merge branch 'nfs-for-2.6.32' of ↵J. Bruce Fields
git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming Conflicts: net/sunrpc/cache.c
2009-08-21SUNRPC: Ensure that sunrpc gets initialised before nfs, lockd, etc...Trond Myklebust
We can oops if rpc_pipefs isn't properly initialised before we start to set up objects that depend upon it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-20nfs: fix compile error in rpc_pipefs.hJ. Bruce Fields
This include is needed for the definition of delayed_work. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19nfs: Remove reference to generic_osync_inode from a commentJan Kara
generic_file_direct_write() no longer calls generic_osync_inode() so remove the comment. CC: linux-nfs@vger.kernel.org CC: Neil Brown <neilb@suse.de> CC: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19SUNRPC: cache must take a reference to the cache detail's module on open()Trond Myklebust
Otherwise we Oops if the module containing the cache detail is removed before all cache readers have closed the file. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19NFS: Use the DNS resolver in the mount code.Trond Myklebust
In the referral code, use it to look up the new server's ip address if the fs_locations attribute contains a hostname. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19NFS: Add a dns resolver for use with NFSv4 referrals and migrationTrond Myklebust
The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client from one server to another in order to support filesystem migration and replication. For full protocol support, we need to add the ability to convert a DNS host name into an IP address that we can feed to the RPC client. We'll reuse the sunrpc cache, now that it has been converted to work with rpc_pipefs. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19SUNRPC: Fix a typo in cache_pipefs_filesTrond Myklebust
We want the channel to be a regular file, so that we don't need to supply rpc_pipe_ops. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19Merge branch 'nfsv4_xdr_cleanups-for-2.6.32' into nfs-for-2.6.32Trond Myklebust
Conflicts: fs/nfs/nfs4xdr.c
2009-08-14nfs: nfs4xdr: optimize low level decodingBenny Halevy
do not increment decoding ptr if not needed. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14nfs: nfs4xdr: get rid of READ_BUFBenny Halevy
Use xdr_inline_decode instead. Open code debug printout and error return. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14nfs: nfs4xdr: simplify decode_exchange_id by reusing decode_opaque_inlineBenny Halevy
Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14nfs: nfs4xdr: get rid of COPYMEMBenny Halevy
Just directly call memcpy. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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