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2017-05-15nfs: don't cast callback decode/proc/encode routinesChristoph Hellwig1-17/+10
Instead declare all functions with the proper methods signature. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@redhat.com> Acked-by: Trond Myklebust <trond.myklebust@primarydata.com>
2016-09-22nfs: add handling for CB_NOTIFY_LOCK in clientJeff Layton1-0/+9
For now, the callback doesn't do anything. Support for that will be added in later patches. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-09-19NFSv4.x: Add kernel parameter to control the callback serverTrond Myklebust1-1/+2
Add support for the kernel parameter nfs.callback_nr_threads to set the number of threads that will be assigned to the callback channel. Add support for the kernel parameter nfs.nfs.max_session_cb_slots to set the maximum size of the callback channel slot table. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-09-19NFSv4.x: Switch to using svc_set_num_threads() to manage the callback threadsTrond Myklebust1-0/+2
This will allow us to bump the number of callback threads at will. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2016-01-25NFSv4.x: Allow multiple callbacks in flightTrond Myklebust1-1/+2
Hook the callback channel into the same session management machinery as we use for the forward channel. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-10-21NFS: Remove the left function defines in callback.hKinglong Mee1-6/+0
Commit 778be232a207 "NFS do not find client in NFSv4 pg_authenticate" has remove the define and using of nfs4_set_callback_sessionid(), and commit 36281caa839f "NFSv4: Further clean-ups of delegation stateid validation" has update the checking of stateid, and move the code to nfs4proc.c. This patch remove those function defines left in callback.h Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-10-21NFS: Remove the left global variable nfs_callback_tcpportKinglong Mee1-1/+0
Commit bbe0a3aa4e22 "NFS: make nfs_callback_tcpport per network context" has make nfs_callback_tcpport per network, but left the global nfs_callback_tcpport, remove it. Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2015-10-21NFS: Get rid of the unneeded addr stored in callback argumentsKinglong Mee1-5/+0
Commit c36fca52f5 "NFS refactor nfs_find_client and reference client across callback processing" has store clp in cb_process_state which is set in cb_sequence. So that, it's unneeded to store address pointer in any callback arguments. Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2013-06-08NFS: Add in v4.2 callback operationBryan Schumaker1-0/+2
NFS v4.2 adds a CB_OFFLOAD operation used by COPY and WRITE_PLUS. Since neither of these operations have been implemented yet, simply return NFS4ERR_NOTSUPP. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-06-08NFS: Make callbacks minor version genericBryan Schumaker1-0/+1
I found a few places that hardcode the minor version number rather than making it dependent on the protocol the callback came in over. This patch makes it easier to add new minor versions in the future. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06NFSv4.1: Clean up session drainingTrond Myklebust1-2/+0
Coalesce nfs4_check_drain_bc_complete and nfs4_check_drain_fc_complete into a single function that can be called when the slot table is known to be empty, then change nfs4_callback_free_slot() and nfs4_free_slot() to use it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-06NFSv4.1: Don't confuse target_highest_slotid and max_slots in cb_recall_slotTrond Myklebust1-1/+1
Don't confuse the table size and the target_highest_slotid... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-02nfs: declare nfs_callback_tcp_port in headerStanislav Kinsbursky1-0/+1
Sparse warning: fs/nfs/super.c:2638:16: sparse: symbol 'nfs_callback_tcpport' was not declared. Should it be static? Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-01NFS: make nfs_callback_tcpport6 per network contextStanislav Kinsbursky1-1/+0
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-01NFS: make nfs_callback_tcpport per network contextStanislav Kinsbursky1-1/+0
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-10-01NFS: pass net to nfs_callback_down()Stanislav Kinsbursky1-1/+1
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-07-30NFS: Convert v4 into a moduleBryan Schumaker1-1/+1
This patch exports symbols needed by the v4 module. In addition, I also switch over to using IS_ENABLED() to check if CONFIG_NFS_V4 or CONFIG_NFS_V4_MODULE are set. The module (nfs4.ko) will be created in the same directory as nfs.ko and will be automatically loaded the first time you try to mount over NFS v4. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4.1: Convert slotid from u8 to u32Trond Myklebust1-1/+1
It is perfectly legal to negotiate up to 2^32-1 slots in the protocol, and with 10GigE, we are already seeing that 255 slots is far too limiting. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-06NFS: search for client session id in proper network namespaceStanislav Kinsbursky1-0/+1
Network namespace is taken from request transport and passed as a part of cb_process_state structure. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-01-12NFS: add an endian notationDan Carpenter1-1/+1
This function returns a big endian value. The implementation in fs/nfs/callback_proc.c is declared with "__be32" but the .h file uses "unsigned" instead. It makes sparse complain: fs/nfs/callback_proc.c:232:8: error: symbol 'nfs4_callback_layoutrecall' redeclared with different type (originally declared at fs/nfs/callback.h:165) - different base types Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-08-04NFSv4.1: Fix the callback 'highest_used_slotid' behaviourTrond Myklebust1-1/+1
Currently, there is no guarantee that we will call nfs4_cb_take_slot() even though nfs4_callback_compound() will consistently call nfs4_cb_free_slot() provided the cb_process_state has set the 'clp' field. The result is that we can trigger the BUG_ON() upon the next call to nfs4_cb_take_slot(). This patch fixes the above problem by using the slot id that was taken in the CB_SEQUENCE operation as a flag for whether or not we need to call nfs4_cb_free_slot(). It also fixes an atomicity problem: we need to set tbl->highest_used_slotid atomically with the check for NFS4_SESSION_DRAINING, otherwise we end up racing with the various tests in nfs4_begin_drain_session(). Cc: stable@kernel.org [2.6.38+] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-05-29pnfs: CB_NOTIFY_DEVICEIDMarc Eshel1-0/+17
Note: This functionlaity is incomplete as all layout segments referring to the 'to be removed device id' need to be reaped, and all in flight I/O drained. [use be32 res in nfs4_callback_devicenotify] [use nfs_client to qualify deviceid for cb_notify_deviceid] [use global deviceid cache for CB_NOTIFY_DEVICEID] [refactor device cache _lookup_deviceid] [refactor device cache _find_get_deviceid] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Bug in new global-device-cache code] [layout_driver MUST set free_deviceid_node if using dev-cache] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2011-01-25NFS do not find client in NFSv4 pg_authenticateAndy Adamson1-2/+2
The information required to find the nfs_client cooresponding to the incoming back channel request is contained in the NFS layer. Perform minimal checking in the RPC layer pg_authenticate method, and push more detailed checking into the NFS layer where the nfs_client can be found. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: update nfs4_callback_recallany to handle layoutsAlexandros Batsakis1-0/+8
While here, update the code a bit. Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-01-06pnfs: CB_LAYOUTRECALL xdr codeFred Isaman1-0/+19
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>
2011-01-06NFS add session back channel drainingAndy Adamson1-1/+2
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 refactor nfs_find_client and reference client across callback processingAndy Adamson1-7/+21
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 Adamson1-0/+1
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>
2010-02-10nfs41: implement cb_recall_slotAndy Adamson1-0/+8
Drain the fore channel and reset the max_slots to the new value. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-05nfs41: v2 fix cb_recall bugAlexandros Batsakis1-1/+4
in NFSv4.1 the seqid part of a stateid in CB_RECALL must be 0 Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-12-05nfs41: V2 initial support for CB_RECALL_ANYAlexandros Batsakis1-0/+11
For now the clients returns _all_ the delegations of the specificed type it holds Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17nfs41: Backchannel: update cb_sequence args and resultsRicardo Labiaga1-2/+2
Change the type of cs_addr and csr_status to 'struct sockaddr' and '__be32' since the cb_sequence processing function will use existing functionality that expects these types. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: cb_sequence proc implementationBenny Halevy1-0/+4
Currently, just free up any referring calls information. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: fix csr_{,target}highestslotid] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: cb_sequence protocol level data structuresBenny Halevy1-0/+35
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: consider minorversion in callback_xdr:process_opBenny Halevy1-0/+1
Note that this patch changes the nfsv4.0 behavior also when CONFIG_NFS_V4_1 is not defined where NFS4ERR_MINOR_VERS_MISMATCH will be returned if the client received a CB_COMPOUND with minorversion != 0. Previously, it would have returned NFS4ERR_OP_ILLEGAL for CB_SEQUENCE. (or if the server is broken and sent OP_CB_GETATTR or OP_CB_RECALL with minorversion!=0, they would have been processed normally. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: refactor op preprocessing out of process_op] See http://linux-nfs.org/pipermail/pnfs/2009-June/007845.html [nfs41: define CB_NOTIFY_DEVICEID as not supported] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: callback numbers definitionsBenny Halevy1-0/+10
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: decode minorversion 1 cb_compound headerBenny Halevy1-1/+0
decode cb_compound header conforming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Get rid of cb_compound_hdr_arg.callback_ident callback_ident is not used anywhere so we shouldn't waste any memory to store it. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: no need to break read_buf in decode_compound_hdr_arg] See http://linux-nfs.org/pipermail/pnfs/2009-June/007844.html Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: store minorversion in cb_compound_hdr_argBenny Halevy1-0/+1
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: Allow NFSv4 and NFSv4.1 callback services to coexistAndy Adamson1-5/+2
Tracks the nfs_callback_info for both versions, enabling the callback service for v4 and v4.1 to run concurrently and be stopped independently of each other. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: Implement NFSv4.1 callback service process.Ricardo Labiaga1-0/+7
nfs41_callback_up() initializes the necessary queues and creates the new nfs41_callback_svc thread. This thread executes the callback service which waits for requests to arrive on the svc_serv->sv_cb_list. NFS41_BC_MIN_CALLBACKS is set to 1 because we expect callbacks to not cause substantial latency. The actual processing of the callback will be implemented as a separate patch. There is only one NFSv4.1 callback service. The first caller of nfs4_callback_up() creates the service, subsequent callers increment a reference count on the service. The service is destroyed when the last caller invokes nfs_callback_down(). The transport needs to hold a reference to the callback service in order to invoke it during callback processing. Currently this reference is only obtained when the service is first created. This is incorrect, since subsequent registrations for other transports will leave the xprt->serv pointer uninitialized, leading to an oops when a callback arrives on the "unreferenced" transport. This patch fixes the problem by ensuring that a reference to the service is saved in xprt->serv, either because the service is created by this invocation to nfs4_callback_up() or by a prior invocation. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Add a reference to svc_serv during callback service bring up] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Type check arguments of nfs_callback_up] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: save svc_serv in nfs_callback_info] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Removal of ugly #ifdefs] [nfs41: Update to removal of ugly #ifdefs] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17nfs41: minorversion support for nfs4_{init,destroy}_callbackBenny Halevy1-1/+1
move nfs4_init_callback into nfs4_init_client_minor_version and nfs4_destroy_callback into nfs4_clear_client_minor_version as these need to happen also when auto-negotiating the minorversion once the callback service for nfs41 becomes different than for nfs4.0 Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Fix checkpatch warning] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Type check arguments of nfs_callback_up] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Backchannel: Remove FIXME comment] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-03-28NFS: Start PF_INET6 callback listener only if IPv6 support is availableChuck Lever1-0/+1
Apparently a lot of people need to disable IPv6 completely on their distributor-built systems, which have CONFIG_IPV6_MODULE enabled at build time. They do this by blacklisting the ipv6.ko module. This causes the creation of the NFSv4 callback service listener to fail if CONFIG_IPV6_MODULE is set, but the module cannot be loaded. Now that the kernel's PF_INET6 RPC listeners are completely separate from PF_INET listeners, we can always start PF_INET. Then the NFS client can try to start a PF_INET6 listener, but it isn't required to be available. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Change cb_recallargs to pass "struct sockaddr *" instead of sockaddr_inChuck Lever1-1/+1
Change the addr field in the cb_recallargs struct to a "struct sockaddr *" to support non-IPv4 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30NFS: Change cb_getattrargs to pass "struct sockaddr *" instead of sockaddr_inChuck Lever1-1/+1
Change the addr field in the cb_getattrargs struct to a "struct sockaddr *" to support non-IPv4 addresses. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-05-14NFS: Fix more sparse warningsTrond Myklebust1-2/+2
- fs/nfs/nfs4xdr.c:2499:42: warning: incorrect type in argument 2 (different signedness) - fs/nfs/nfs4xdr.c:2658:49: warning: incorrect type in argument 4 (different explicit signedness) - fs/nfs/nfs4xdr.c:2683:50: warning: incorrect type in argument 4 (different explicit signedness) - fs/nfs/nfs4xdr.c:3063:68: warning: incorrect type in argument 4 (different explicit signedness) - fs/nfs/nfs4xdr.c:3065:68: warning: incorrect type in argument 4 (different explicit signedness) - fs/nfs/callback_xdr.c:138:31: warning: incorrect type in argument 2 (different signedness) Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-10-20[PATCH] xdr annotations: fs/nfs/callback*Al Viro1-2/+2
on-the-wire data is big-endian [mostly pulled from Alexey's patch] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-20[PATCH] fs/nfs/callback* passes error values big-endianAl Viro1-3/+3
[pulled from Alexey's patch] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no> Acked-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-22NFS: Fix NFS4 callback up/down prototypesDavid Howells1-1/+6
Make the nfs_callback_up()/down() prototypes just do nothing if NFS4 is not enabled. Also make the down function void type since we can't really do anything if it fails. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2006-01-06NFSv4: Allow user to set the port used by the NFSv4 callback channelTrond Myklebust1-0/+1
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2005-04-16Linux-2.6.12-rc2Linus Torvalds1-0/+70
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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