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* tipc: remove files ref.h and ref.cJon Paul Maloy2014-08-231-270/+0
| | | | | | | | | | | | | | | The reference table is now 'socket aware' instead of being generic, and has in reality become a socket internal table. In order to be able to minimize the API exposed by the socket layer towards the rest of the stack, we now move the reference table definitions and functions into the file socket.c, and rename the functions accordingly. There are no functional changes in this commit. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: remove port_lockJon Paul Maloy2014-08-231-87/+71
| | | | | | | | | | | | | | | | | | | | | In previous commits we have reduced usage of port_lock to a minimum, and complemented it with usage of bh_lock_sock() at the remaining locations. The purpose has been to remove this lock altogether, since it largely duplicates the role of bh_lock_sock. We are now ready to do this. However, we still need to protect the BH callers from inadvertent release of the socket while they hold a reference to it. We do this by replacing port_lock by a combination of a rw-lock protecting the reference table as such, and updating the socket reference counter while the socket is referenced from BH. This technique is more standard and comprehensible than the previous approach, and turns out to have a positive effect on overall performance. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: use registry when scanning socketsJon Paul Maloy2014-08-231-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | The functions tipc_port_get_ports() and tipc_port_reinit() scan over all sockets/ports to access each of them. This is done by using a dedicated linked list, 'tipc_socks' where all sockets are members. The list is in turn protected by a spinlock, 'port_list_lock', while each socket is locked by using port_lock at the moment of access. In order to reduce complexity and risk of deadlock, we want to get rid of the linked list and the accompanying spinlock. This is what we do in this commit. Instead of the linked list, we use the port registry to scan across the sockets. We also add usage of bh_lock_sock() inside the scope of port_lock in both functions, as a preparation for the complete removal of port_lock. Finally, we move the functions from port.c to socket.c, and rename them to tipc_sk_sock_show() and tipc_sk_reinit() repectively. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: eliminate redundant lookups in registryJon Paul Maloy2014-03-121-17/+0
| | | | | | | | | | | | | | | | | | | | As an artefact from the native interface, the message sending functions in the port takes a port ref as first parameter, and then looks up in the registry to find the corresponding port pointer. This despite the fact that the only currently existing caller, tipc_sock, already knows this pointer. We change the signature of these functions to take a struct tipc_port* argument, and remove the redundant lookups. We also remove an unmotivated extra lookup in the function socket.c:auto_connect(), and, as the lookup functions tipc_port_deref() and ref_deref() now become unused, we remove these two functions. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: replace reference table rwlock with spinlockJon Paul Maloy2014-03-121-5/+5
| | | | | | | | | | | | | The lock for protecting the reference table is declared as an RWLOCK, although it is only used in write mode, never in read mode. We redefine it to become a spinlock. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: remove all enabled flags from all tipc componentsYing Xue2014-02-221-3/+0
| | | | | | | | | | | | | | | | | | | | | | | When tipc module is inserted, many tipc components are initialized one by one. During the initialization period, if one of them is failed, tipc_core_stop() will be called to stop all components whatever corresponding components are created or not. To avoid to release uncreated ones, relevant components have to add necessary enabled flags indicating whether they are created or not. But in the initialization stage, if one component is unsuccessfully created, we will just destroy successfully created components before the failed component instead of all components. All enabled flags defined in components, in turn, become redundant. Additionally it's also unnecessary to identify whether table.types is NULL in tipc_nametbl_stop() because name stable has been definitely created successfully when tipc_nametbl_stop() is called. Cc: Jon Maloy <jon.maloy@ericsson.com> Cc: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: use standard printk shortcut macros (pr_err etc.)Erik Hugne2012-07-131-5/+5
| | | | | | | | | | | | | | | | | | | | All messages should go directly to the kernel log. The TIPC specific error, warning, info and debug trace macro's are removed and all references replaced with pr_err, pr_warn, pr_info and pr_debug. Commonly used sub-strings are explicitly declared as a const char to reduce .text size. Note that this means the debug messages (changed to pr_debug), are now enabled through dynamic debugging, instead of a TIPC specific Kconfig option (TIPC_DEBUG). The latter will be phased out completely Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> [PG: use pr_fmt as suggested by Joe Perches <joe@perches.com>] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* tipc: compress out gratuitous extra carriage returnsPaul Gortmaker2012-04-301-13/+0
| | | | | | | | | | | | | | | Some of the comment blocks are floating in limbo between two functions, or between blocks of code. Delete the extra line feeds between any comment and its associated following block of code, to be consistent with the majority of the rest of the kernel. Also delete trailing newlines at EOF and fix a couple trivial typos in existing comments. This is a 100% cosmetic change with no runtime impact. We get rid of over 500 lines of non-code, and being blank line deletes, they won't even show up as noise in git blame. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* net: two vzalloc() cleanupsEric Dumazet2011-12-191-2/+1
| | | | | | | We can use vzalloc() helper now instead of __vmalloc() trick Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: remove zeroing assignments to static global variablesAllan Stephens2011-01-011-1/+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>
* tipc: cleanup various cosmetic whitespace issuesAllan Stephens2011-01-011-4/+2
| | | | | | | | | | | | | Cleans up TIPC's source code to eliminate deviations from generally accepted coding conventions relating to leading/trailing white space and white space around commas, braces, cases, and sizeof. 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>
* tipc: cleanup function namespacestephen hemminger2010-10-161-17/+0
| | | | | | | | | | | | | | | | Do some cleanups of TIPC based on make namespacecheck 1. Don't export unused symbols 2. Eliminate dead code 3. Make functions and variables local 4. Rename buf_acquire to tipc_buf_acquire since it is used in several files Compile tested only. This make break out of tree kernel modules that depend on TIPC routines. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: fix lockdep warning on address assignmentNeil Horman2010-03-161-10/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So in the forward porting of various tipc packages, I was constantly getting this lockdep warning everytime I used tipc-config to set a network address for the protocol: [ INFO: possible circular locking dependency detected ] 2.6.33 #1 tipc-config/1326 is trying to acquire lock: (ref_table_lock){+.-...}, at: [<ffffffffa0315148>] tipc_ref_discard+0x53/0xd4 [tipc] but task is already holding lock: (&(&entry->lock)->rlock#2){+.-...}, at: [<ffffffffa03150d5>] tipc_ref_lock+0x43/0x63 [tipc] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&(&entry->lock)->rlock#2){+.-...}: [<ffffffff8107b508>] __lock_acquire+0xb67/0xd0f [<ffffffff8107b78c>] lock_acquire+0xdc/0x102 [<ffffffff8145471e>] _raw_spin_lock_bh+0x3b/0x6e [<ffffffffa03152b1>] tipc_ref_acquire+0xe8/0x11b [tipc] [<ffffffffa031433f>] tipc_createport_raw+0x78/0x1b9 [tipc] [<ffffffffa031450b>] tipc_createport+0x8b/0x125 [tipc] [<ffffffffa030f221>] tipc_subscr_start+0xce/0x126 [tipc] [<ffffffffa0308fb2>] process_signal_queue+0x47/0x7d [tipc] [<ffffffff81053e0c>] tasklet_action+0x8c/0xf4 [<ffffffff81054bd8>] __do_softirq+0xf8/0x1cd [<ffffffff8100aadc>] call_softirq+0x1c/0x30 [<ffffffff810549f4>] _local_bh_enable_ip+0xb8/0xd7 [<ffffffff81054a21>] local_bh_enable_ip+0xe/0x10 [<ffffffff81454d31>] _raw_spin_unlock_bh+0x34/0x39 [<ffffffffa0308eb8>] spin_unlock_bh.clone.0+0x15/0x17 [tipc] [<ffffffffa0308f47>] tipc_k_signal+0x8d/0xb1 [tipc] [<ffffffffa0308dd9>] tipc_core_start+0x8a/0xad [tipc] [<ffffffffa01b1087>] 0xffffffffa01b1087 [<ffffffff8100207d>] do_one_initcall+0x72/0x18a [<ffffffff810872fb>] sys_init_module+0xd8/0x23a [<ffffffff81009b42>] system_call_fastpath+0x16/0x1b -> #0 (ref_table_lock){+.-...}: [<ffffffff8107b3b2>] __lock_acquire+0xa11/0xd0f [<ffffffff8107b78c>] lock_acquire+0xdc/0x102 [<ffffffff81454836>] _raw_write_lock_bh+0x3b/0x6e [<ffffffffa0315148>] tipc_ref_discard+0x53/0xd4 [tipc] [<ffffffffa03141ee>] tipc_deleteport+0x40/0x119 [tipc] [<ffffffffa0316e35>] release+0xeb/0x137 [tipc] [<ffffffff8139dbf4>] sock_release+0x1f/0x6f [<ffffffff8139dc6b>] sock_close+0x27/0x2b [<ffffffff811116f6>] __fput+0x12a/0x1df [<ffffffff811117c5>] fput+0x1a/0x1c [<ffffffff8110e49b>] filp_close+0x68/0x72 [<ffffffff8110e552>] sys_close+0xad/0xe7 [<ffffffff81009b42>] system_call_fastpath+0x16/0x1b Finally decided I should fix this. Its a straightforward inversion, tipc_ref_acquire takes two locks in this order: ref_table_lock entry->lock while tipc_deleteport takes them in this order: entry->lock (via tipc_port_lock()) ref_table_lock (via tipc_ref_discard()) when the same entry is referenced, we get the above warning. The fix is equally straightforward. Theres no real relation between the entry->lock and the ref_table_lock (they just are needed at the same time), so move the entry->lock aquisition in tipc_ref_acquire down, after we unlock ref_table_lock (this is safe since the ref_table_lock guards changes to the reference table, and we've already claimed a slot there. I've tested the below fix and confirmed that it clears up the lockdep issue Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Eliminate improper use of TIPC_OK error codeAllan Stephens2008-07-141-1/+1
| | | | | | | | | | | 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>
* tipc: Fix race condition when creating socket or native portAllan Stephens2008-05-121-4/+8
| | | | | | | | | | | This patch eliminates the (very remote) chance of a crash resulting from a partially initialized socket or native port unexpectedly receiving a message. Now, during the creation of a socket or native port, the underlying generic port's lock is not released until all initialization required to handle incoming messages has been done. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TIPC]: Cleanup of TIPC reference table codeAllan Stephens2008-04-161-47/+34
| | | | | | | | | | | | | This patch is a largely cosmetic cleanup of the TIPC reference table code. - The object reference field in each table entry is now single 32-bit integer instead of a union of two 32-bit integers. - Variable naming has been made more consistent. - Error message output has been made more consistent. - Useless #includes have been eliminated. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TIPC]: Optimized initialization of TIPC reference tableAllan Stephens2008-04-161-47/+76
| | | | | | | | This patch modifies TIPC's reference table code to delay initializing table entries until they are actually needed by applications. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TIPC]: Remove inlining of reference table locking routinesAllan Stephens2008-04-161-4/+87
| | | | | | | | | | This patch converts the TIPC reference table locking routines into non-inlined routines, since they are mainly called from non-performance critical areas of TIPC and the added code footprint incurred through inlining can no longer be justified. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: fix integer as NULL pointer sparse warnings in tipcHarvey Harrison2008-02-241-1/+1
| | | | | | | | | | net/tipc/cluster.c:145:2: warning: Using plain integer as NULL pointer net/tipc/link.c:3254:36: warning: Using plain integer as NULL pointer net/tipc/ref.c:151:15: warning: Using plain integer as NULL pointer net/tipc/zone.c:85:2: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] TIPC: Fix whitespace errors.YOSHIFUJI Hideaki2007-02-101-12/+12
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TIPC]: Removing useless castsPanagiotis Issaris2006-07-211-1/+1
| | | | | | | Removing useless casts Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] spin/rwlock init cleanupsIngo Molnar2006-06-271-2/+2
| | | | | | | | | | | | | | | | | | | | | 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>
* [TIPC]: First phase of assert() cleanupAllan Stephens2006-06-251-5/+26
| | | | | | | | | | This also contains enhancements to simplify comparisons in name table publication removal algorithm and to simplify name table sanity checking when shutting down TIPC. 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>
* [TIPC]: Fix simple sparse warningsSam Ravnborg2006-03-201-4/+4
| | | | | | | | | | | | | 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>
* [TIPC] Avoid polluting the global namespacePer Liden2006-01-181-36/+36
| | | | | | This patch adds a tipc_ prefix to all externally visible symbols. Signed-off-by: Per Liden <per.liden@ericsson.com>
* [TIPC] More updates of file headersPer Liden2006-01-121-1/+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>
* [TIPC] Update of file headersPer Liden2006-01-121-2/+1
| | | | | | | The copyright statements from different parts of Ericsson have been merged into one. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
* [TIPC] License header updatePer Liden2006-01-121-9/+13
| | | | | | | | 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>
* [TIPC] Initial mergePer Liden2006-01-121-0/+186
TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
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