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2008-12-30Merge branch 'devel' into nextTrond Myklebust1-0/+16
2008-12-23rpc: pass target name down to rpc level on callbacksOlga Kornievskaia1-0/+16
The rpc client needs to know the principal that the setclientid was done as, so it can tell gssd who to authenticate to. Signed-off-by: Olga Kornievskaia <aglo@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-10-31net: replace NIPQUAD() in net/*/Harvey Harrison1-2/+2
Using NIPQUAD() with NIPQUAD_FMT, %d.%d.%d.%d or %u.%u.%u.%u can be replaced with %pI4 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-29net: replace %p6 with %pI6Harvey Harrison1-1/+1
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-28net, misc: replace uses of NIP6_FMT with %p6Harvey Harrison1-2/+2
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-15Merge branch 'next'Trond Myklebust1-2/+2
2008-10-07sunrpc: fix oops in rpc_create when the mount namespace is unsharedCedric Le Goater1-2/+2
On a system with nfs mounts, if a task unshares its mount namespace, a oops can occur when the system is rebooted if the task is the last to unreference the nfs mount. It will try to create a rpc request using utsname() which has been invalidated by free_nsproxy(). The patch fixes the issue by using the global init_utsname() which is always valid. the capability of identifying rpc clients per uts namespace stills needs some extra work so this should not be a problem. BUG: unable to handle kernel NULL pointer dereference at 00000004 IP: [<c024c9ab>] rpc_create+0x332/0x42f Oops: 0000 [#1] DEBUG_PAGEALLOC Pid: 1857, comm: uts-oops Not tainted (2.6.27-rc5-00319-g7686ad5 #4) EIP: 0060:[<c024c9ab>] EFLAGS: 00210287 CPU: 0 EIP is at rpc_create+0x332/0x42f EAX: 00000000 EBX: df26adf0 ECX: c0251887 EDX: 00000001 ESI: df26ae58 EDI: c02f293c EBP: dda0fc9c ESP: dda0fc2c DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 Process uts-oops (pid: 1857, ti=dda0e000 task=dd9a0778 task.ti=dda0e000) Stack: c0104532 dda0fffc dda0fcac dda0e000 dda0e000 dd93b7f0 00000009 c02f2880 df26aefc dda0fc68 c01096b7 00000000 c0266ee0 c039a070 c039a070 dda0fc74 c012ca67 c039a064 dda0fc8c c012cb20 c03daf74 00000011 00000000 c0275c90 Call Trace: [<c0104532>] ? dump_trace+0xc2/0xe2 [<c01096b7>] ? save_stack_trace+0x1c/0x3a [<c012ca67>] ? save_trace+0x37/0x8c [<c012cb20>] ? add_lock_to_list+0x64/0x96 [<c0256fc4>] ? rpcb_register_call+0x62/0xbb [<c02570c8>] ? rpcb_register+0xab/0xb3 [<c0252f4d>] ? svc_register+0xb4/0x128 [<c0253114>] ? svc_destroy+0xec/0x103 [<c02531b2>] ? svc_exit_thread+0x87/0x8d [<c01a75cd>] ? lockd_down+0x61/0x81 [<c01a577b>] ? nlmclnt_done+0xd/0xf [<c01941fe>] ? nfs_destroy_server+0x14/0x16 [<c0194328>] ? nfs_free_server+0x4c/0xaa [<c019a066>] ? nfs_kill_super+0x23/0x27 [<c0158585>] ? deactivate_super+0x3f/0x51 [<c01695d1>] ? mntput_no_expire+0x95/0xb4 [<c016965b>] ? release_mounts+0x6b/0x7a [<c01696cc>] ? __put_mnt_ns+0x62/0x70 [<c0127501>] ? free_nsproxy+0x25/0x80 [<c012759a>] ? switch_task_namespaces+0x3e/0x43 [<c01275a9>] ? exit_task_namespaces+0xa/0xc [<c0117fed>] ? do_exit+0x4fd/0x666 [<c01181b3>] ? do_group_exit+0x5d/0x83 [<c011fa8c>] ? get_signal_to_deliver+0x2c8/0x2e0 [<c0102630>] ? do_notify_resume+0x69/0x700 [<c011d85a>] ? do_sigaction+0x134/0x145 [<c0127205>] ? hrtimer_nanosleep+0x8f/0xce [<c0126d1a>] ? hrtimer_wakeup+0x0/0x1c [<c0103488>] ? work_notifysig+0x13/0x1b ======================= Code: 70 20 68 cb c1 2c c0 e8 75 4e 01 00 8b 83 ac 00 00 00 59 3d 00 f0 ff ff 5f 77 63 eb 57 a1 00 80 2d c0 8b 80 a8 02 00 00 8d 73 68 <8b> 40 04 83 c0 45 e8 41 46 f7 ff ba 20 00 00 00 83 f8 21 0f 4c EIP: [<c024c9ab>] rpc_create+0x332/0x42f SS:ESP 0068:dda0fc2c Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-09-29nfsd: use nfs client rpc callback programBenny Halevy1-1/+1
since commit ff7d9756b501744540be65e172d27ee321d86103 "nfsd: use static memory for callback program and stats" do_probe_callback uses a static callback program (NFS4_CALLBACK) rather than the one set in clp->cl_callback.cb_prog as passed in by the client in setclientid (4.0) or create_session (4.1). This patches introduces rpc_create_args.prognumber that allows overriding program->number when creating rpc_clnt. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2008-07-09SUNRPC: Ensure our task is notified when an rpcbind call is doneTrond Myklebust1-5/+3
If another task is busy in rpcb_getport_async number, it is more efficient to have it wake us up when it has finished instead of arbitrarily sleeping for 5 seconds. Also ensure that rpcb_wake_rpcbind_waiters() is called regardless of whether or not rpcb_getport_done() gets called. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09rpc: bring back cl_chattyOlga Kornievskaia1-5/+11
The cl_chatty flag alows us to control whether a given rpc client leaves "server X not responding, timed out" messages in the syslog. Such messages make sense for ordinary nfs clients (where an unresponsive server means applications on the mountpoint are probably hanging), but not for the callback client (which can fail more commonly, with the only result just of disabling some optimizations). Previously cl_chatty was removed, do to lack of users; reinstate it, and use it for the nfsd's callback client. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Display some debugging information as text rather than numbersChuck Lever1-13/+16
In rpc_show_tasks(), display the program name, version number, procedure name and tk_action as human-readable variable-length text fields rather than columnar numbers. Doing the symbol lookup here helps in cases where we have actual debugging output from a kernel log, but don't have access to the kernel image or RPC module that generated the output. Sample output: -pid- flgs status -client- --rqstp- -timeout ---ops-- 5608 0001 -11 eeb42690 f6d93710 0 f8fa1764 nfsv3 WRITE a:call_transmit_status q:none 5609 0001 -11 eeb42690 f6d937e0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5610 0001 -11 eeb42690 f6d93230 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5611 0001 -11 eeb42690 f6d93300 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5612 0001 -11 eeb42690 f6d93090 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5613 0001 -11 eeb42690 f6d933d0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5614 0001 -11 eeb42690 f6d93cc0 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5615 0001 -11 eeb42690 f6d93a50 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5616 0001 -11 eeb42690 f6d93640 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5617 0001 -11 eeb42690 f6d93b20 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending 5618 0001 -11 eeb42690 f6d93160 0 f8fa1764 nfsv3 WRITE a:call_status q:xprt_sending Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Refactor rpc_show_tasksChuck Lever1-22/+24
Clean up: move the logic that displays each task to its own function. This removes indentation and makes future changes easier. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Don't display the rpc_show_tasks header if there are no tasksChuck Lever1-7/+12
Clean up: don't display the rpc_show_tasks column header unless there is at least one task to display. As far as I can tell, it is safe to let the list_for_each_entry macro decide that each list is empty. scripts/checkpatch.pl also wants a KERN_FOO at the start of any newly added printk() calls, so this and subsequent patches will also add KERN_INFO. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Rename "call_" functions that are no longer FSM statesChuck Lever1-21/+14
The RPC client uses a finite state machine to move RPC tasks through each step of an RPC request. Each state is contained in a function in net/sunrpc/clnt.c, and named call_foo. Some of the functions named call_foo have changed over the past few years and are no longer states in the FSM. These include: call_encode, call_header, and call_verify. As a clean up, rename the functions that have changed. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Add a function to display the name of an RPC procedureChuck Lever1-4/+19
Improve debugging messages in call_start() and call_verify() by having them show the RPC procedure name instead of the procedure number. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: An ENOMEM error from call_encode is always fatalTrond Myklebust1-4/+0
The special 'ENOMEM' case that was previously flagged as non-fatal is bogus: auth_gss always returns EAGAIN for non-fatal errors, and may in fact return ENOMEM in the special case where xdr_buf_read_netobj runs out of preallocated buffer space (invariably a _fatal_ error, since there is no provision for preallocating larger buffers). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-07-09SUNRPC: Ensure we exit early in case of an encode errorTrond Myklebust1-2/+7
All errors from call_encode(), with exception of EAGAIN are fatal, so we should immediately return instead of proceeding to xprt_transmit(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-04-24Merge branch 'devel'Trond Myklebust1-20/+30
2008-04-24SUNRPC: Invalidate the RPCSEC_GSS session if the server dropped the requestTrond Myklebust1-0/+5
RFC 2203 requires the server to drop the request if it believes the RPCSEC_GSS context is out of sequence. The problem is that we have no way on the client to know why the server dropped the request. In order to avoid spinning forever trying to resend the request, the safe approach is therefore to always invalidate the RPCSEC_GSS context on every major timeout. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-04-19SUNRPC: Don't disconnect more than once if retransmitting NFSv4 requestsTrond Myklebust1-2/+4
NFSv4 requires us to ensure that we break the TCP connection before we're allowed to retransmit a request. However in the case where we're retransmitting several requests that have been sent on the same connection, we need to ensure that we don't interfere with the attempt to reconnect and/or break the connection again once it has been established. We therefore introduce a 'connection' cookie that is bumped every time a connection is broken. This allows requests to track if they need to force a disconnection. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-04-19SUNRPC: Fix read ordering problems with req->rq_private_buf.lenTrond Myklebust1-13/+13
We want to ensure that req->rq_private_buf.len is updated before req->rq_received, so that call_decode() doesn't use an old value for req->rq_rcv_buf.len. In 'call_decode()' itself, instead of using task->tk_status (which is set using req->rq_received) must use the actual value of req->rq_private_buf.len when deciding whether or not the received RPC reply is too short. Finally ensure that we set req->rq_rcv_buf.len to zero when retrying a request. A typo meant that we were resetting req->rq_private_buf.len in call_decode(), and then clobbering that value with the old rq_rcv_buf.len again in xprt_transmit(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-04-19SUNRPC: Fix a bug in call_decode()Trond Myklebust1-3/+6
call_verify() can, under certain circumstances, free the RPC slot. In that case, our cached pointer 'req = task->tk_rqstp' is invalid. Bug was introduced in commit 220bcc2afd7011b3e0569fc178331fa983c92c1b (SUNRPC: Don't call xprt_release in call refresh). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-04-17Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6David S. Miller1-4/+0
2008-04-08SUNRPC: Fix a memory leak in rpc_create()Chuck Lever1-4/+0
Commit 510deb0d was supposed to move the xprt_create_transport() call in rpc_create(), but neglected to remove the old call site. This resulted in a transport leak after every rpc_create() call. This leak is present in 2.6.24 and 2.6.25. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-03-05net: replace remaining __FUNCTION__ occurrencesHarvey Harrison1-22/+22
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-28Merge branch 'cleanups' into nextTrond Myklebust1-2/+2
2008-02-25SUNRPC: Convert users of rpc_wake_up_task to use rpc_wake_up_queued_taskTrond Myklebust1-1/+1
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-02-25SUNRPC: Add a new helper rpc_wake_up_queued_task()Trond Myklebust1-1/+1
In all cases where we currently use rpc_wake_up_task(), we almost always know on which waitqueue the rpc_task is actually sleeping. This will allows us to simplify the queue locking in a future patch. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-02-14SUNRPC: Declare as const the rpc_message arguments to rpc_call_sync/asyncTrond Myklebust1-2/+2
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-02-13docbook: sunrpc filenames and notation fixesRandy Dunlap1-5/+5
Use updated file list for docbook files and fix kernel-doc warnings in sunrpc: Warning(linux-2.6.24-git12//net/sunrpc/rpc_pipe.c:689): No description found for parameter 'rpc_client' Warning(linux-2.6.24-git12//net/sunrpc/rpc_pipe.c:765): No description found for parameter 'flags' Warning(linux-2.6.24-git12//net/sunrpc/clnt.c:584): No description found for parameter 'tk_ops' Warning(linux-2.6.24-git12//net/sunrpc/clnt.c:618): No description found for parameter 'bufsize' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-01Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/miscLinus Torvalds1-52/+3
* 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc: (22 commits) Remove commented-out code copied from NFS NFS: Switch from intr mount option to TASK_KILLABLE Add wait_for_completion_killable Add wait_event_killable Add schedule_timeout_killable Use mutex_lock_killable in vfs_readdir Add mutex_lock_killable Use lock_page_killable Add lock_page_killable Add fatal_signal_pending Add TASK_WAKEKILL exit: Use task_is_* signal: Use task_is_* sched: Use task_contributes_to_load, TASK_ALL and TASK_NORMAL ptrace: Use task_is_* power: Use task_is_* wait: Use TASK_NORMAL proc/base.c: Use task_is_* proc/array.c: Use TASK_REPORT perfmon: Use task_is_* ... Fixed up conflicts in NFS/sunrpc manually..
2008-01-30SUNRPC: Don't bother changing the sigmask for asynchronous RPC callsTrond Myklebust1-3/+6
The caller will never sleep in rpc_execute, so don't bother setting the sigmask. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: fewer conditionals in the format_ip_address routinesChuck Lever1-1/+2
Clean up: have the set up routines explicitly pass the strings to be used for the transport name and NETID. This removes a number of conditionals and dependencies on rpc_xprt.prot, which is overloaded. Tighten up type checking on the address_strings array while we're at it. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Add support for per-client timeout valuesTrond Myklebust1-3/+9
In order to be able to support setting the timeo and retrans parameters on a per-mountpoint basis, we move the rpc_timeout structure into the rpc_clnt. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: cleanup for rpc_new_client()Trond Myklebust1-10/+14
There is no reason why we shouldn't just pass the rpc_create_args. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: rpc_create() default hostname should support AF_INET6 addressesChuck Lever1-5/+27
If the ULP doesn't pass a hostname string to rpc_create(), it manufactures one based on the passed-in address. Be smart enough to handle an AF_INET6 address properly in this case. Move the default servername logic before the xprt_create_transport() call to simplify error handling in rpc_create(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Remove the now unused function rpc_call_setup()Trond Myklebust1-18/+0
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Allow rpc_init_task() to initialise the rpc_task->tk_msgTrond Myklebust1-7/+4
In preparation for the removal of rpc_call_setup(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Add a helper rpc_call_start() that initialises task->tk_actionTrond Myklebust1-0/+7
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Mask signals across the call to rpc_call_setup() in rpc_run_taskTrond Myklebust1-6/+7
To ensure that the RPCSEC_GSS upcall is performed with the correct sigmask. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Clean up rpc_run_taskTrond Myklebust1-27/+9
Make it use the new task initialiser structure instead of acting as a wrapper. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Cleanup of rpc_task initialisationTrond Myklebust1-14/+37
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Restrict sunrpc client exportsTrond Myklebust1-12/+12
The sunrpc client exports are not meant to be part of any official kernel API: they can change at the drop of a hat. Mark them as internal functions using EXPORT_SYMBOL_GPL. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Move exported declarations to the function declarationsTrond Myklebust1-0/+10
Do this for all RPC client related functions and XDR functions. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2008-01-30SUNRPC: Make call_status()/call_decode() call xprt_force_disconnect()Trond Myklebust1-2/+2
Move the calls to xprt_disconnect() over to xprt_force_disconnect() in order to enable the transport layer to manage the state of the XPRT_CONNECTED flag. Ditto in xs_tcp_read_fraghdr(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-12-06NFS: Switch from intr mount option to TASK_KILLABLEMatthew Wilcox1-45/+2
By using the TASK_KILLABLE infrastructure, we can get rid of the 'intr' mount option. We have to use _killable everywhere instead of _interruptible as we get rid of rpc_clnt_sigmask/sigunmask. Signed-off-by: Liam R. Howlett <howlett@gmail.com> Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
2007-10-09SUNRPC: Don't call xprt_release in call refreshTrond Myklebust1-1/+2
Call it from call_verify() instead... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-10-09SUNRPC: Don't call xprt_release() if call_allocate failsTrond Myklebust1-2/+1
It completely fouls up the RPC call statistics, and serves no useful purpose. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-10-09SUNRPC: Fix default hostname created in rpc_create()J. Bruce Fields1-1/+1
Since 43780b87fa7..., rpc_create() fills in a default hostname based on the ip address if the servername passed in is null. A small typo made that default incorrect. (But this information appears to be used only for debugging right now, so I don't believe the typo causes any bugs in the current kernel.) Thanks to Olga Kornievskaia for bug report and testing. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Cc: Olga Kornievskaia <aglo@citi.umich.edu> Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2007-10-09NFS/SUNRPC: support transport protocol naming\"Talpey, Thomas\1-1/+1
To prepare for including non-sockets-based RPC transports, select RPC transports by an identifier (to be used in following patches). Signed-off-by: Tom Talpey <tmt@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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