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path: root/drivers/infiniband/core/ucm.c
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2013-02-27IB/core: convert to idr_alloc()Tejun Heo
Convert to the much saner new idr interface. v2: Mike triggered WARN_ON() in idr_preload() because send_mad(), which may be used from non-process context, was calling idr_preload() unconditionally. Preload iff @gfp_mask has __GFP_WAIT. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Sean Hefty <sean.hefty@intel.com> Reported-by: "Marciniszyn, Mike" <mike.marciniszyn@intel.com> Cc: Roland Dreier <roland@kernel.org> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-30IB/core: Remove unused variables in ucm/ucmaDotan Barak
Remove unused wait objects from ucm/ucma events flow. Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-01-04rdma/core: Fix sparse warningsSean Hefty
Clean up sparse warnings in the rdma core layer. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2011-10-06RDMA/ucm: Removed checks for unsigned value < 0Hefty, Sean
cmd is unsigned, no need to check for < 0. Found by code inspection. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2010-05-25IB/ucm: Use memdup_user()Julia Lawall
Use memdup_user when user data is immediately copied into the allocated region. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to,size,flag; position p; identifier l1,l2; @@ - to = \(kmalloc@p\|kzalloc@p\)(size,flag); + to = memdup_user(from,size); if ( - to==NULL + IS_ERR(to) || ...) { <+... when != goto l1; - -ENOMEM + PTR_ERR(to) ...+> } - if (copy_from_user(to, from, size) != 0) { - <+... when != goto l2; - -EFAULT - ...+> - } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk>
2010-04-21IB: Explicitly rule out llseek to avoid BKL in default_llseek()Roland Dreier
Several RDMA user-access drivers have file_operations structures with no .llseek method set. None of the drivers actually do anything with f_pos, so this means llseek is essentially a NOP, instead of returning an error as leaving other file_operations methods unimplemented would do. This is mostly harmless, except that a NULL .llseek means that default_llseek() is used, and this function grabs the BKL, which we would like to avoid. Since llseek does nothing useful on these files, we would like it to return an error to userspace instead of silently grabbing the BKL and succeeding. For nearly all of the file types, we take the belt-and-suspenders approach of setting the .llseek method to no_llseek and also calling nonseekable_open(); the exception is the uverbs_event files, which are created with anon_inode_getfile(), which already sets f_mode the same way as nonseekable_open() would. This work is motivated by Arnd Bergmann's bkl-removal tree. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-07driver core: Convert some drivers to CLASS_ATTR_STRINGAndi Kleen
Convert some drivers who export a single string as class attribute to the new class_attr_string functions. This removes redundant code all over. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-07driver-core: Add attribute argument to class_attribute show/storeAndi Kleen
Passing the attribute to the low level IO functions allows all kinds of cleanups, by sharing low level IO code without requiring an own function for every piece of data. Also drivers can extend the attributes with own data fields and use that in the low level function. This makes the class attributes the same as sysdev_class attributes and plain attributes. This will allow further cleanups in drivers. Full tree sweep converting all users. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-02-24IB/ucm: Clean whitespace errorsAlexander Chiang
As shown when 'let c_space_errors=1' is set in vim. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-02-24IB/ucm: Increase maximum devices supportedAlexander Chiang
Some large systems may support more than IB_UCM_MAX_DEVICES (currently 32). This change allows us to support more devices in a backwards-compatible manner. the first IB_UCM_MAX_DEVICES keep the same major/minor device numbers they've always had. If there are more than IB_UCM_MAX_DEVICES, then we dynamically request a new major device number (new minors start at 0). Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-02-24IB/ucm: Use stack variable 'base' in ib_ucm_add_oneAlexander Chiang
This change is not useful by itself, but sets us up for a future change that allows us to support more than IB_UCM_MAX_DEVICES. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-02-24IB/ucm: Use stack variable 'devnum' in ib_ucm_add_oneAlexander Chiang
This change is not useful by itself, but sets us up for a future change that allows us to dynamically allocate device numbers in case we have more than IB_UCM_MAX_DEVICES in the system. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2009-10-04headers: remove sched.h from poll.hAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06infiniband: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
Acked-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-24RDMA/ucm: BKL is not needed for ib_ucm_open()Roland Dreier
Remove explicit cycle_kernel_lock() call and document why the code is safe. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-07-14RDMA: Remove subversion $Id tagsRoland Dreier
They don't get updated by git and so they're worse than useless. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-06-20Add a bunch of cycle_kernel_lock() callsJonathan Corbet
All of the open() functions which don't need the BKL on their face may still depend on its acquisition to serialize opens against driver initialization. So make those functions acquire then release the BKL to be on the safe side. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-06-20Add "no BKL needed" comments to several driversJonathan Corbet
This documents the fact that somebody looked at the relevant open() functions and concluded that, due to their trivial nature, no locking was needed. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-04-19IB: convert struct class_device to struct deviceTony Jones
This converts the main ib_device to use struct device instead of struct class_device as class_device is going away. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Roland Dreier <rolandd@cisco.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-25IB/cm: Add basic performance countersSean Hefty
Add performance/debug counters to track sent/received messages, retries, and duplicates. Counters are tracked per CM message type, per port. The counters are always enabled, so intrusive state tracking is not done. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-07-10IB/cm: Include HCA ACK delay in local ACK timeoutSean Hefty
The IB CM should include the HCA ACK delay when calculating the local ACK timeout value to use for RC QPs. If the HCA ACK delay is large enough relative to the packet life time, then if it is not taken into account, the calculated timeout value ends up being too small, which can result in "retry exceeded" errors. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-04-24IB/ucm: Simplify ib_ucm_event()Sean Hefty
Use wait_event_interruptible() instead of a more complicated open-coded equivalent. Signed-off-by: Sean Hefty <sean.hefty@intel.com>
2007-02-12[PATCH] mark struct file_operations const 3Arjan van de Ven
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-11-29IB/ucm: Fix deadlock in cleanupMichael S. Tsirkin
ib_ucm_cleanup_events() holds file_mutex while calling ib_destroy_cm_id(). This can deadlock since ib_destroy_cm_id() flushes event handlers, and ib_ucm_event_handler() needs file_mutex, too. Therefore, drop the file_mutex during the call to ib_destroy_cm_id(). Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-29IB/cm: Fix automatic path migration supportSean Hefty
The ib_cm_establish() function is replaced with a more generic ib_cm_notify(). This routine is used to notify the CM that failover has occurred, so that future CM messages (LAP, DREQ) reach the remote CM. (Currently, we continue to use the original path) This bumps the userspace CM ABI. New alternate path information is captured when a LAP message is sent or received. This allows QP attributes to be initialized for the user when a new path is loaded after failover occurs. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-11-29IB: kmemdup() cleanupEric Sesterhenn
Replace open coded kmemdup() to save some screen space, and allow inlining/not inlining to be triggered by gcc. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22RDMA: iWARP Core Changes.Tom Tucker
Modifications to the existing rdma header files, core files, drivers, and ulp files to support iWARP, including: - Hook iWARP CM into the build system and use it in rdma_cm. - Convert enum ib_node_type to enum rdma_node_type, which includes the possibility of RDMA_NODE_RNIC, and update everything for this. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-09-22IB: Whitespace fixesRoland Dreier
Remove some trailing whitespace that has snuck in despite the best efforts of whitespace=error-all. Also fix a few other whitespace bogosities. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17IB/ucm: Get rid of duplicate P_Key parameterSean Hefty
The P_Key is provided into a SIDR REQ in two places, once as a parameter, and again in the path record. Remove the P_Key as a parameter and always use the one given in the path record. This change has no practical effect on ABI functionality. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17IB/ucm: convert semaphore to mutexSean Hefty
Convert semaphore in ib_ucm_file to a real mutex. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17IB/cm: Match connection requests based on private dataSean Hefty
Extend matching connection requests to listens in the InfiniBand CM to include private data checks. This allows applications to listen on the same service identifier, with private data directing the request to the appropriate application. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-06-17IB: common handling for marshalling parameters to/from userspaceSean Hefty
Provide common handling for marshalling data between userspace clients and kernel InfiniBand drivers. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-05-12IB: refcount race fixesSean Hefty
Fix race condition during destruction calls to avoid possibility of accessing object after it has been freed. Instead of waking up a wait queue directly, which is susceptible to a race where the object is freed between the reference count going to 0 and the wake_up(), use a completion to wait in the function doing the freeing. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2006-02-06[PATCH] IB: fix up major/minor sysfs interface for IB coreGreg Kroah-Hartman
Current IB code doesn't work with userspace programs that listen only to the kernel event netlink socket as it is trying to create its own dev interface. This small patch fixes this problem, and removes some unneeded code as the driver core handles this logic for you automatically. Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-13IB: convert from semaphores to mutexesIngo Molnar
semaphore to mutex conversion by Ingo and Arjan's script. Signed-off-by: Ingo Molnar <mingo@elte.hu> [ Sanity-checked on real IB hardware ] Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-11-02[IB] kzalloc() conversionsRoland Dreier
Replace kmalloc()+memset(,0,) with kzalloc(), for a net savings of 35 source lines and about 500 bytes of text. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-10-24Manual merge of for-linus to upstream (fix conflicts in ↵Roland Dreier
drivers/infiniband/core/ucm.c)
2005-10-24[IB] Add idr_destroy() calls on module unloadRoland Dreier
Add idr_destroy() calls to the module_exit() functions of the four IB driver modules that use idrs, so we don't leak idr_layer_cache objects when these modules are unloaded. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-10-17[IB] ucm: quiet sparse warningsRoland Dreier
Make ctx_id_mutex and ctx_id_table static to quiet sparse warnings. Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-10-17[IB] CM: bind IDs to a specific deviceSean Hefty
Bind communication identifiers to a device to support device removal. Export per HCA CM devices to userspace. Signed-off-by: Sean Hefty <sean.hefty@intel.com>
2005-10-17[IB] merge ucm.h into ucm.cSean Hefty
Eliminate ucm.h. Replace ucm_dbg with direct call to printk KERN_ERR. Signed-off-by: Sean Hefty <sean.hefty@intel.com>
2005-09-07[PATCH] IB: Add user-supplied context to userspace CM ABISean Hefty
- Add user specified context to all uCM events. Users will not retrieve any events associated with the context after destroying the corresponding cm_id. - Provide the ib_cm_init_qp_attr() call to userspace clients of the CM. This call may be used to set QP attributes properly before modifying the QP. - Fixes some error handling synchonization and cleanup issues. - Performs some minor code cleanup. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-08-26[PATCH] IB: fix userspace CM deadlockSean Hefty
Fix deadlock condition resulting from trying to destroy a cm_id from the context of a CM thread. The synchronization around the ucm context structure is simplified as a result, and some simple code cleanup is included. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2005-07-27[IB/ucm]: Clean up userspace CMHal Rosenstock
Only print debug messages when debug_level is set. Eliminate NULL checks prior to calling kfree. Signed-off-by: Hal Rosenstock <halr@voltaire.com> Signed-off-by: Libor Michalek <libor@topspin.com>
2005-07-27[PATCH] Add kernel portion of user CM implementation (fix)Tom Duffy
Include the patch openib-general changing class_simple to class. Signed-off-by: Tom Duffy <tduffy@sun.com> Cc: Hal Rosenstock <halr@voltaire.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27[PATCH] IB: Add kernel portion of user CM implementationHal Rosenstock
Add kernel portion of user CM implementation Signed-off-by: Libor Michalek <libor@topspin.com> Signed-off-by: Hal Rosenstock <halr@voltaire.com> Cc: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>