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2012-02-24tipc: Eliminate support for tipc_mode global variableAllan Stephens1-1/+1
Removes all references to the global variable that records whether TIPC is running in "single node" mode or "network" mode, since this information can be easily deduced from the global variable that records TIPC's network address. (i.e. a non-zero network address means that TIPC is running in network mode.) The changes made update most existing mode-based checks to use the network address global variable. A few checks that are no longer needed are removed entirely, along with any associated code lying on non-executable control paths. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-02-24tipc: Eliminate a test for negative unsigned quantitiesAllan Stephens1-2/+1
Simplifies a comparison operation to eliminate a useless test that checks if an unsigned value is less than zero. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-29tipc: rename struct bearer_name to struct tipc_bearer_namesPaul Gortmaker1-5/+5
The addition of the "s" to indicate pluralization is intentional, since the struct actually contains two name variants. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-29tipc: rename struct link* to struct tipc_link*Paul Gortmaker1-9/+11
This converts the following: struct link -> struct tipc_link struct link_req -> struct tipc_link_req struct link_name -> struct tipc_link_name Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-29tipc: rename struct media to struct tipc_mediaPaul Gortmaker1-6/+6
Give it a meaningful prefix, as suggested by DaveM, so that it is consistent with things like struct tipc_bearer, and so it isn't confused with anything else. This has no impact on the actual runtime code behaviour. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Allow run-time alteration of default link settingsAllan Stephens1-8/+10
Permits run-time alteration of default link settings on a per-media and per-bearer basis, in addition to the existing per-link basis. The following syntax can now be used: tipc-config -lt=<link-name|bearer-name|media-name>/<tolerance> tipc-config -lp=<link-name|bearer-name|media-name>/<priority> tipc-config -lw=<link-name|bearer-name|media-name>/<window> Note that changes to the default settings for a given media type has no effect on the default settings used by existing bearers. Similarly, changes to default bearer settings has no effect on existing link endpoints that utilize that interface. Thanks to Florian Westphal <fw@strlen.de> for his contributions to the development of this enhancement. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Hide media-specific addressing details from generic bearer codeAllan Stephens1-8/+6
Reworks TIPC's media address data structure and associated processing routines to transfer all media-specific details of address conversion to the associated TIPC media adaptation code. TIPC's generic bearer code now only needs to know which media type an address is associated with and whether or not it is a broadcast address, and totally ignores the "value" field that contains the actual media-specific addressing info. These changes eliminate the need for a number of endianness conversion operations and will make it easier for TIPC to support new media types in the future. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Improve handling of media address printing errorsAllan Stephens1-7/+5
Enhances conversion of a media address to printable form so that an unconvertable address will be displayed as a string of hex digits, rather than not being displayed at all. (Also removes a pointless check for the existence of the media-specific address conversion routine, since the routine is not optional.) Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Streamline media registration error checkingAllan Stephens1-29/+8
Simplifies error handling performed during media registration, since TIPC no longer supports the dynamic addition of new media types that are potentially error-prone. These simplifications include the following: 1) No longer check for premature registration of a new media type. 2) No longer check for negative link priority values (which was pointless since such values are unsigned, and could cause a compiler warning). 3) No longer generate a warning describing the exact cause of any registration failure (just warns that overall registration failed). Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Eliminate duplication of media structuresAllan Stephens1-20/+15
Changes TIPC's list of registered media types from an array of media structures to an array of pointers to media structures. This eliminates the need to copy of the contents of the structure passed in during media registration. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Optimize detection of duplicate media registrationAllan Stephens1-19/+21
Streamlines the detection of an attempt to register a TIPC media structure using an already registered name or type identifier. The revised logic now reuses an existing routine to detect an existing name and no longer unnecessarily manipulates the media type counter during an unsuccessful registration attempt. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-12-27tipc: Register new media using pre-compiled structureAllan Stephens1-45/+25
Speeds up the registration of TIPC media types by passing in a structure containing the required information, rather than by passing in the various fields describing the media type individually. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-09-01tipc: Ensure congested links receive bearer status updatesAllan Stephens1-0/+2
Modifies code that disables a bearer to ensure that all of its links are deleted, not just its uncongested links. Similarly, modifies code that blocks a bearer to ensure that all of its links are reset, not just its uncongested links. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-09-01tipc: Remove non-executable code to handle broadcast bearer congestionAllan Stephens1-5/+1
Eliminates code associated with the sending of unsent broadcast link traffic when the broadcast pseudo-bearer becomes unblocked following a temporary congestion situation. This code is non-executable because the broadcast pseudo-bearer never becomes blocked [see tipc_bcbearer_send()]. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-06-24tipc: Eliminate unused field in bearer structureAllan Stephens1-1/+0
Gets rid of counter that records the number of times a bearer has resumed after congestion or blocking, since the value is never referenced anywhere. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-05-10tipc: Add monitoring of number of nodes discovered by bearerAllan Stephens1-2/+2
Augments TIPC's discovery object to track the number of neighboring nodes having an active link to the associated bearer. This means tipc_disc_update_link_req() becomes either one of: tipc_disc_add_dest() or: tipc_disc_remove_dest() depending on the code flow direction of things. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-05-10tipc: Enhance handling of discovery object creation failuresAllan Stephens1-12/+18
Modifies bearer creation and deletion code to improve handling of scenarios when a neighbor discovery object cannot be created. The creation routine now aborts the creation of a bearer if its discovery object cannot be created, and deletes the newly created bearer, rather than failing quietly and leaving an unusable bearer hanging around. Since the exit via the goto label really isn't a definitive failure in all cases, relabel it appropriately. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-05-10tipc: Strengthen checks for neighboring node discoveryAllan Stephens1-2/+9
Enhances existing checks on the discovery domain associated with a TIPC bearer. A bearer can no longer be configured to accept links from itself only (which would be pointless), or to nodes outside its own cluster (since multi-cluster support has now been removed from TIPC). Also, the neighbor discovery routine now validates link setup requests against the configured discovery domain for the bearer, rather than simply ensuring the requesting node belongs to the node's own cluster. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-03-13tipc: Remove bearer flag indicating existence of broadcast addressAllan Stephens1-5/+2
Eliminates the flag in the TIPC bearer structure that indicates if the bearer supports broadcasting, since the flag is always set to 1 and serves no useful purpose. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-03-13tipc: Remove unused field in bearer structureAllan Stephens1-1/+0
Eliminates a field in TIPC's bearer objects that is set, but never referenced. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-03-13tipc: Correct misnamed references to neighbor discovery domainAllan Stephens1-7/+7
Renames items that are improperly labelled as "network scope" items (which are represented by simple integer values) rather than "network domain" items (which are represented by <Z.C.N>-type network addresses). This change is purely cosmetic, and does not affect the operation of TIPC. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-02-23tipc: Remove unused message header field for requested number of linksAllan Stephens1-1/+1
Eliminates support for the "number of requested links" field in a neighbor discovery message. This field was never used and has been removed from the TIPC 2.0 protocol specification. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-02-23tipc: Combine bearer structure with tipc_bearer structureAllan Stephens1-50/+48
Combines two distinct structures containing information about a TIPC bearer into a single structure. The structures were previously kept separate so that public information about a bearer could be made available to plug-in media types using TIPC's native API, while the remaining information was kept private for use by TIPC itself. However, now that the native API has been removed there is no longer any need for this arrangement. Since one of the structures was already embedded within the other, the change largely involves replacing instances of "publ.foo" with "foo". The changes do not otherwise alter the operation of TIPC bearers. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-01-01tipc: remove extraneous braces from single statementsAllan Stephens1-2/+1
Cleans up TIPC's source code to eliminate the presence of unnecessary use of {} around single statements. These changes are purely cosmetic and do not alter the operation of TIPC in any way. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-01tipc: remove zeroing assignments to static global variablesAllan Stephens1-1/+1
Cleans up TIPC's source code to eliminate the needless initialization of static variables to zero. These changes are purely cosmetic and do not alter the operation of TIPC in any way. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-01tipc: split variable assignments out of conditional expressionsAllan Stephens1-1/+2
Cleans up TIPC's source code to eliminate assigning values to variables within conditional expressions, improving code readability and reducing warnings from various code checker tools. These changes are purely cosmetic and do not alter the operation of TIPC in any way. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-01tipc: remove redundant #includesAllan Stephens1-1/+0
Eliminates a number of #include statements that no longer serve any useful purpose. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-01tipc: remove calls to dbg() and msg_dbg()Allan Stephens1-1/+0
Eliminates obsolete calls to two of TIPC's main debugging macros, as well as a pair of associated debugging routines that are no longer required. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-02tipc: Eliminate useless return value when disabling a bearerAllan Stephens1-4/+5
Modifies bearer_disable() to return void since it always indicates success anyway. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-02tipc: Remove obsolete inclusions of header filesAllan Stephens1-3/+0
Gets rid of #include statements that are no longer required as a result of the merging of obsolete native API header file content into other TIPC include files. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-21tipc: delete needless memset from bearer enabling.Allan Stephens1-2/+0
Eliminates zeroing out of the new bearer structure at the start of activation, since it is already in that state. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-18tipc: Simplify bearer shutdown logicAllan Stephens1-27/+11
Optimize processing in TIPC's bearer shutdown code, including: 1. Remove an unnecessary check to see if TIPC bearer's can exist. 2. Don't release spinlocks before calling a media-specific disabling routine, since the routine can't sleep. 3. Make bearer_disable() operate directly on a struct bearer, instead of needlessly taking a name and then mapping that to the struct. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reviewed-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-23net: return operator cleanupEric Dumazet1-1/+1
Change "return (EXPR);" to "return EXPR;" return is not a function, parentheses are not required. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12tipc: Reduce footprint by un-inlining bearer congestion routineAllan Stephens1-0/+12
Convert bearer congestion inline routine that is more than one line into a standard function, thereby eliminating some repeated code. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-12tipc: add tipc_ prefix to fcns targeted for un-inliningAllan Stephens1-2/+2
These functions have enough code in them such that they seem like sensible targets for un-inlining. Prior to doing that, this adds the tipc_ prefix to the functions, so that in the event of a panic dump or similar, the subsystem from which the functions come from is immediately clear. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-04tipc: Fix oops on send prior to entering networked mode (v3)Neil Horman1-31/+6
Fix TIPC to disallow sending to remote addresses prior to entering NET_MODE user programs can oops the kernel by sending datagrams via AF_TIPC prior to entering networked mode. The following backtrace has been observed: ID: 13459 TASK: ffff810014640040 CPU: 0 COMMAND: "tipc-client" [exception RIP: tipc_node_select_next_hop+90] RIP: ffffffff8869d3c3 RSP: ffff81002d9a5ab8 RFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000001001001 RBP: 0000000001001001 R8: 0074736575716552 R9: 0000000000000000 R10: ffff81003fbd0680 R11: 00000000000000c8 R12: 0000000000000008 R13: 0000000000000001 R14: 0000000000000001 R15: ffff810015c6ca00 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 RIP: 0000003cbd8d49a3 RSP: 00007fffc84e0be8 RFLAGS: 00010206 RAX: 000000000000002c RBX: ffffffff8005d116 RCX: 0000000000000000 RDX: 0000000000000008 RSI: 00007fffc84e0c00 RDI: 0000000000000003 RBP: 0000000000000000 R8: 00007fffc84e0c10 R9: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc84e0d10 R14: 0000000000000000 R15: 00007fffc84e0c30 ORIG_RAX: 000000000000002c CS: 0033 SS: 002b What happens is that, when the tipc module in inserted it enters a standalone node mode in which communication to its own address is allowed <0.0.0> but not to other addresses, since the appropriate data structures have not been allocated yet (specifically the tipc_net pointer). There is nothing stopping a client from trying to send such a message however, and if that happens, we attempt to dereference tipc_net.zones while the pointer is still NULL, and explode. The fix is pretty straightforward. Since these oopses all arise from the dereference of global pointers prior to their assignment to allocated values, and since these allocations are small (about 2k total), lets convert these pointers to static arrays of the appropriate size. All the accesses to these bits consider 0/NULL to be a non match when searching, so all the lookups still work properly, and there is no longer a chance of a bad dererence anywhere. As a bonus, this lets us eliminate the setup/teardown routines for those pointers, and elimnates the need to preform any locking around them to prevent access while their being allocated/freed. I've updated the tipc_net structure to behave this way to fix the exact reported problem, and also fixed up the tipc_bearers and media_list arrays to fix an obvious simmilar problem that arises from issuing tipc-config commands to manipulate bearers/links prior to entering networked mode I've tested this for a few hours by running the sanity tests and stress test with the tipcutils suite, and nothing has fallen over. There have been a few lockdep warnings, but those were there before, and can be addressed later, as they didn't actually result in any deadlock. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Allan Stephens <allan.stephens@windriver.com> CC: David S. Miller <davem@davemloft.net> CC: tipc-discussion@lists.sourceforge.net bearer.c | 37 ++++++------------------------------- bearer.h | 2 +- net.c | 25 ++++--------------------- 3 files changed, 11 insertions(+), 53 deletions(-) Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-29tipc: fix test of bearer_priority range in tipc_register_media()roel kluin1-1/+1
For the bearer_priority to be less than TIPC_MIN_LINK_PRI and greater than TIPC_MAX_LINK_PRI is logically impossible. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-02tipc: Don't use structure names which easily globally conflict.David S. Miller1-1/+1
Andrew Morton reported a build failure on sparc32, because TIPC uses names like "struct node" and there is a like named data structure defined in linux/node.h This just regexp replaces "struct node*" to "struct tipc_node*" to avoid this and any future similar problems. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-14tipc: Eliminate improper use of TIPC_OK error codeAllan Stephens1-4/+4
This patch corrects many places where TIPC routines indicated successful completion by returning TIPC_OK instead of 0. (The TIPC_OK symbol has the value 0, but it should only be used in contexts that deal with the error code field of a TIPC message header.) Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-10[NET] TIPC: Fix whitespace errors.YOSHIFUJI Hideaki1-29/+29
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-10-18[TIPC]: Added duplicate node address detection capabilityAllan Stephens1-4/+4
TIPC now rejects and logs link setup requests from node <Z.C.N> if the receiving node already has a functional link to that node on the associated interface, or if the requestor is using the same <Z.C.N> as the receiver. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Per Liden <per.liden@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-21[NET]: Conversions from kmalloc+memset to k(z|c)alloc.Panagiotis Issaris1-4/+2
Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-27[PATCH] spin/rwlock init cleanupsIngo Molnar1-1/+1
locking init cleanups: - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK() - convert rwlocks in a similar manner this patch was generated automatically. Motivation: - cleanliness - lockdep needs control of lock initialization, which the open-coded variants do not give - it's also useful for -rt and for lock debugging in general Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25[TIPC]: Enhanced & cleaned up system messages; fixed 2 obscure memory leaks.Allan Stephens1-31/+39
Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Per Liden <per.liden@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20[TIPC]: Fix simple sparse warningsSam Ravnborg1-10/+10
Tried to run the new tipc stack through sparse. Following patch fixes all cases where 0 was used as replacement of NULL. Use NULL to document this is a pointer and to silence sparse. This brough sparse warning count down with 127 to 24 warnings. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Per Liden <per.liden@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-18[TIPC] Avoid polluting the global namespacePer Liden1-85/+85
This patch adds a tipc_ prefix to all externally visible symbols. Signed-off-by: Per Liden <per.liden@ericsson.com>
2006-01-18[TIPC] Updated link priority macrosPer Liden1-6/+13
Added macros for min/default/max link priority in tipc_config.h. Also renamed TIPC_NUM_LINK_PRI to TIPC_MEDIA_LINK_PRI since that is a more accurate description of what it is used for. Signed-off-by: Per Liden <per.liden@ericsson.com>
2006-01-12[TIPC] More updates of file headersPer Liden1-1/+1
Updated copyright notice to include the year the file was actually created. Information about file creation dates was extracted from the files in the old CVS repository at tipc.sourceforge.net. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-12[TIPC] Update of file headersPer Liden1-2/+1
The copyright statements from different parts of Ericsson have been merged into one. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
2006-01-12[TIPC] License header updatePer Liden1-19/+23
The license header in each file now more clearly state that this code is licensed under a dual BSD/GPL. Before this was only evident if you looked at the MODULE_LICENSE line in core.c. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
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