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2009-10-11headers: remove sched.h from interrupt.hAlexey Dobriyan
After m68k's task_thread_info() doesn't refer to current, it's possible to remove sched.h from interrupt.h and not break m68k! Many thanks to Heiko Carstens for allowing this. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-09-24net: fix htmldocs sunrpc, clnt.cJaswinder Singh Rajput
DOCPROC Documentation/DocBook/networking.xml Warning(net/sunrpc/clnt.c:647): No description found for parameter 'req' Warning(net/sunrpc/clnt.c:647): No description found for parameter 'tk_ops' Warning(net/sunrpc/clnt.c:647): Excess function parameter 'ops' description in 'rpc_run_bc_task' Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Cc: Benny Halevy <bhalevy@panasas.com> Cc: Andy Adamson <andros@netapp.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Miller <davem@davemloft.net> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-09-24sysctl: remove "struct file *" argument of ->proc_handlerAlexey Dobriyan
It's unused. It isn't needed -- read or write flag is already passed and sysctl shouldn't care about the rest. It _was_ used in two places at arch/frv for some reason. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23headers: utsname.h reduxAlexey Dobriyan
* remove asm/atomic.h inclusion from linux/utsname.h -- not needed after kref conversion * remove linux/utsname.h inclusion from files which do not need it NOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however due to some personality stuff it _is_ needed -- cowardly leave ELF-related headers and files alone. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23sunrpc/rpc_pipe: fix kernel-doc notationRandy Dunlap
Fix kernel-doc notation (& warnings) in sunrpc/rpc_pipe.c. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-09-23NFS/RPC: fix problems with reestablish_timeout and related code.Neil Brown
[[resending with correct cc: - "vfs.kernel.org" just isn't right!]] xprt->reestablish_timeout is used to cause TCP connection attempts to back off if the connection fails so as not to hammer the network, but to still allow immediate connections when there is no reason to believe there is a problem. It is not used for the first connection (when transport->sock is NULL) but only on reconnects. It is currently set: a/ to 0 when xs_tcp_state_change finds a state of TCP_FIN_WAIT1 on the assumption that the client has closed the connection so the reconnect should be immediate when needed. b/ to at least XS_TCP_INIT_REEST_TO when xs_tcp_state_change detects TCP_CLOSING or TCP_CLOSE_WAIT on the assumption that the server closed the connection so a small delay at least is required. c/ as above when xs_tcp_state_change detects TCP_SYN_SENT, so that it is never 0 while a connection has been attempted, else the doubling will produce 0 and there will be no backoff. d/ to double is value (up to a limit) when delaying a connection, thus providing exponential backoff and e/ to XS_TCP_INIT_REEST_TO in xs_setup_tcp as simple initialisation. So you can see it is highly dependant on xs_tcp_state_change being called as expected. However experimental evidence shows that xs_tcp_state_change does not see all state changes. ("rpcdebug -m rpc trans" can help show what actually happens). Results show: TCP_ESTABLISHED is reported when a connection is made. TCP_SYN_SENT is never reported, so rule 'c' above is never effective. When the server closes the connection, TCP_CLOSE_WAIT and TCP_LAST_ACK *might* be reported, and TCP_CLOSE is always reported. This rule 'b' above will sometimes be effective, but not reliably. When the client closes the connection, it used to result in TCP_FIN_WAIT1, TCP_FIN_WAIT2, TCP_CLOSE. However since commit f75e674 (SUNRPC: Fix the problem of EADDRNOTAVAIL syslog floods on reconnect) we don't see *any* events on client-close. I think this is because xs_restore_old_callbacks is called to disconnect xs_tcp_state_change before the socket is closed. In any case, rule 'a' no longer applies. So all that is left are rule d, which successfully doubles the timeout which is never rest, and rule e which initialises the timeout. Even if the rules worked as expected, there would be a problem because a successful connection does not reset the timeout, so a sequence of events where the server closes the connection (e.g. during failover testing) will cause longer and longer timeouts with no good reason. This patch: - sets reestablish_timeout to 0 in xs_close thus effecting rule 'a' - sets it to 0 in xs_tcp_data_ready to ensure that a successful connection resets the timeout - sets it to at least XS_TCP_INIT_REEST_TO after it is doubled, thus effecting rule c I have not reimplemented rule b and the new version of rule c seems sufficient. I suspect other code in xs_tcp_data_ready needs to be revised as well. For example I don't think connect_cookie is being incremented as often as it should be. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-09-22Merge branch 'for-2.6.32' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.32' of git://linux-nfs.org/~bfields/linux: (68 commits) nfsd4: nfsv4 clients should cross mountpoints nfsd: revise 4.1 status documentation sunrpc/cache: avoid variable over-loading in cache_defer_req sunrpc/cache: use list_del_init for the list_head entries in cache_deferred_req nfsd: return success for non-NFS4 nfs4_state_start nfsd41: Refactor create_client() nfsd41: modify nfsd4.1 backchannel to use new xprt class nfsd41: Backchannel: Implement cb_recall over NFSv4.1 nfsd41: Backchannel: cb_sequence callback nfsd41: Backchannel: Setup sequence information nfsd41: Backchannel: Server backchannel RPC wait queue nfsd41: Backchannel: Add sequence arguments to callback RPC arguments nfsd41: Backchannel: callback infrastructure nfsd4: use common rpc_cred for all callbacks nfsd4: allow nfs4 state startup to fail SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronous nfsd4: fix null dereference creating nfsv4 callback client nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked. ...
2009-09-22const: mark remaining super_operations constAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-18sunrpc/cache: avoid variable over-loading in cache_defer_reqNeilBrown
In cache_defer_req, 'dreq' is used for two significantly different values that happen to be of the same type. This is both confusing, and makes it hard to extend the range of one of the values as we will in the next patch. So introduce 'discard' to take one of the values. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-18sunrpc/cache: use list_del_init for the list_head entries in cache_deferred_reqNeilBrown
Using list_del_init is generally safer than list_del, and it will allow us, in a subsequent patch, to see if an entry has already been processed or not. Signed-off-by: NeilBrown <neilb@suse.de> 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>
2009-09-13nfsd41: 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>
2009-09-11Merge branch 'nfs-for-2.6.32'Trond Myklebust
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>
2009-08-28SUNRPC: Fix rpc_task_force_reencodeTrond Myklebust
This patch fixes the bug that was reported in http://bugzilla.kernel.org/show_bug.cgi?id=14053 If we're in the case where we need to force a reencode and then resend of the RPC request, due to xprt_transmit failing with a networking error, then we _must_ retransmit the entire request. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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>
2009-08-25sunrpc: 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>
2009-08-24nfsd41: 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>
2009-08-21Merge 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>
2009-08-19SUNRPC: 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: 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
2009-08-14sunrpc: ntoh -> be*_to_cpuBenny Halevy
ntohl is already defined as be32_to_cpu. be64_to_cpu has architecture specific optimized implementations. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14sunrpc: hton -> cpu_to_be*Benny Halevy
htonl is already defined as cpu_to_be32. cpu_to_be64 has architecture specific optimized implementations. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-10Merge branch 'sunrpc_cache-for-2.6.32' into nfs-for-2.6.32Trond Myklebust
2009-08-10Merge branch 'patches_cel-for-2.6.32' into nfs-for-2.6.32Trond Myklebust
2009-08-09SUNRPC: Add an rpc_pipefs front end for the sunrpc cache codeTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Move procfs-specific stuff out of the generic sunrpc cache codeTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Allow the cache_detail to specify alternative upcall mechanismsTrond Myklebust
For events that are rare, such as referral DNS lookups, it makes limited sense to have a daemon constantly listening for upcalls on a channel. An alternative in those cases might simply be to run the app that fills the cache using call_usermodehelper_exec() and friends. The following patch allows the cache_detail to specify alternative upcall mechanisms for these particular cases. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Remove the global temporary write buffer in net/sunrpc/cache.cTrond Myklebust
While we do want to protect against multiple concurrent readers and writers on each upcall/downcall pipe, we don't want to limit concurrent reading and writing to separate caches. This patch therefore replaces the static buffer 'write_buf', which can only be used by one writer at a time, with use of the page cache as the temporary buffer for downcalls. We still fall back to using the the old global buffer if the downcall is larger than PAGE_CACHE_SIZE, since this is apparently needed by the SPKM security context initialisation. It then replaces the use of the global 'queue_io_mutex' with the inode->i_mutex in cache_read() and cache_write(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Ensure we initialise the cache_detail before creating procfs filesTrond Myklebust
Also ensure that we destroy those files before we destroy the cache_detail. Otherwise, user processes might attempt to write into uninitialised caches. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09NFSD: Clean up the idmapper warning...Trond Myklebust
What part of 'internal use' is so hard to understand? Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: One more clean up for rpc_create_client_dir()Trond Myklebust
In order to allow rpc_pipefs to create directories with different types of subtrees, it is useful to allow the caller to customise the subtree filling process. In order to do so, we separate out the parts which are specific to making an RPC client directory, and put them in a separate helper, then we convert the process of filling the directory contents into a callback. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: clean up rpc_setup_pipedir()Trond Myklebust
There is still a little wart or two there: Since we've already got a vfsmount, we might as well pass that in to rpc_create_client_dir. Another point is that if we open code __rpc_lookup_path() here, then we can avoid looking up the entire parent directory path over and over again: it doesn't change. Also get rid of rpc_clnt->cl_pathname, since it has no users... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Replace rpc_client->cl_dentry and cl_mnt, with a cl_pathTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up rpc_create_client_dir()Trond Myklebust
Factor out the code that does lookups from the code that actually creates the directory. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Rename rpc_mkdir to rpc_create_client_dir()Trond Myklebust
This reflects the fact that rpc_mkdir() as it stands today, can only create a RPC client type directory. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: rpc_pipefs cleanupTrond Myklebust
Move the files[] array closer to rpc_fill_super() Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up rpc_populate/depopulateTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up rpc_lookup_createTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up rpc_unlink()Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up file creation code in rpc_pipefsTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Clean up rpc_pipefs lookup code...Trond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-09SUNRPC: Allow rpc_pipefs_ops to have null values for upcall and downcallTrond Myklebust
Also ensure that we use the umode_t type when appropriate... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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