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* dlm: validate messages before processingDavid Teigland2008-01-301-35/+104
| | | | | | | | | | | | | | | | | There was some hit and miss validation of messages that has now been cleaned up and unified. Before processing a message, the new validate_message() function checks that the lkb is the appropriate type, process-copy or master-copy, and that the message is from the correct nodeid for the the given lkb. Other checks and assertions on the lkb type and nodeid have been removed. The assertions were particularly bad since they would panic the machine instead of just ignoring the bad message. Although other recent patches have made processing old message unlikely, it still may be possible for an old message to be processed and caught by these checks. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: reject messages from non-membersDavid Teigland2008-01-303-4/+12
| | | | | | | | | | | Messages from nodes that are no longer members of the lockspace should be ignored. When nodes are removed from the lockspace, recovery can sometimes complete quickly enough that messages arrive from a removed node after recovery has completed. When processed, these messages would often cause an error message, and could in some cases change some state, causing problems. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: another call to confirm_master in receive_request_replyDavid Teigland2008-01-301-2/+6
| | | | | | | | | When a failed request (EBADR or ENOTBLK) is unlocked/canceled instead of retried, there may be other lkb's waiting on the rsb_lookup list for it to complete. A call to confirm_master() is needed to move on to the next waiting lkb since the current one won't be retried. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: recover locks waiting for overlap repliesDavid Teigland2008-01-301-5/+32
| | | | | | | | | | | | When recovery looks at locks waiting for replies, it fails to consider locks that have already received a reply for their first remote operation, but not received a reply for secondary, overlapping unlock/cancel. The appropriate stub reply needs to be called for these waiters. Appears when we start doing recovery in the presence of a many overlapping unlock/cancel ops. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: clear ast_type when removing from astqueueDavid Teigland2008-01-301-0/+1
| | | | | | | | | | | | | | The lkb_ast_type field indicates whether the lkb is on the astqueue list. When clearing locks for a process, lkb's were being removed from the astqueue list without clearing the field. If release_lockspace then happened immediately afterward, it could try to remove the lkb from the list a second time. Appears when process calls libdlm dlm_release_lockspace() which first closes the ls dev triggering clear_proc_locks, and then removes the ls (a write to control dev) causing release_lockspace(). Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: use fixed errno values in messagesDavid Teigland2008-01-301-2/+55
| | | | | | | | | | | | | | | | | Some errno values differ across platforms. So if we return things like -EINPROGRESS from one node it can get misinterpreted or rejected on another one. This patch fixes up the errno values passed on the wire so that they match the x86 ones (so as not to break the protocol), and re-instates the platform-specific ones at the other end. Many thanks to Fabio for testing this patch. Initial patch from Patrick. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: swap bytes for rcom lock replyFabio M. Di Nitto2008-01-301-3/+6
| | | | | | | DLM_RCOM_LOCK_REPLY messages need byte swapping. Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: align midcomms message bufferFabio M. Di Nitto2008-01-301-6/+9
| | | | | | | | gcc does not guarantee that an auto buffer is 64bit aligned. This change allows sparc64 to work. Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: close otherconsPatrick Caulfeld2008-01-291-0/+2
| | | | | | | | | | | | | | | | | | This patch addresses a problem introduced with the last round of lowcomms patches where the 'othercon' connections do not get freed when the DLM shuts down. This results in the error message "slab error in kmem_cache_destroy(): cache `dlm_conn': Can't free all objects" and the DLM cannot be restarted without a system reboot. See bz#428119 Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: use dlm prefix on alloc and free functionsDavid Teigland2008-01-296-57/+39
| | | | | | | The dlm functions in memory.c should use the dlm_ prefix. Also, use kzalloc/kfree directly for dlm_direntry's, removing the wrapper functions. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: don't print common non-errorsDavid Teigland2008-01-291-1/+1
| | | | | | | Change log_error() to log_debug() for conditions that can occur in large number in normal operation. Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: proper prototypesAdrian Bunk2008-01-294-19/+16
| | | | | | | | This patch adds a proper prototype for some functions in fs/dlm/dlm_internal.h Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Teigland <teigland@redhat.com>
* dlm: bind connections from known local address when using TCPLon Hohberger2008-01-291-1/+12
| | | | | | | | | | | | | | | | | | | | A common problem occurs when multiple IP addresses within the same subnet are assigned to the same NIC. If we make a connection attempt to another address on the same subnet as one of those addresses, the connection attempt will not necessarily be routed from the address we want. In the case of the DLM, the other nodes will quickly drop the connection attempt, causing problems. This patch makes the DLM bind to the local address it acquired from the cluster manager when using TCP prior to making a connection, obviating the need for administrators to "fix" their systems or use clever routing tricks. Signed-off-by: Lon Hohberger <lhh@redhat.com> Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>
* Kobject: convert fs/* from kobject_unregister() to kobject_put()Greg Kroah-Hartman2008-01-241-2/+2
| | | | | | | | | | | There is no need for kobject_unregister() anymore, thanks to Kay's kobject cleanup changes, so replace all instances of it with kobject_put(). Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Kobject: change GFS2 to use kobject_init_and_addGreg Kroah-Hartman2008-01-241-22/+4
| | | | | | | | | | Stop using kobject_register, as this way we can control the sending of the uevent properly, after everything is properly initialized. Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: convert kernel_kset to be a kobjectGreg Kroah-Hartman2008-01-241-1/+1
| | | | | | | | | | | | kernel_kset does not need to be a kset, but a much simpler kobject now that we have kobj_attributes. We also rename kernel_kset to kernel_kobj to catch all users of this symbol with a build error instead of an easy-to-ignore build warning. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kset: convert kernel_subsys to use kset_createGreg Kroah-Hartman2008-01-241-1/+1
| | | | | | | | | | Dynamically create the kset instead of declaring it statically. We also rename kernel_subsys to kernel_kset to catch all users of this symbol with a build error instead of an easy-to-ignore build warning. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kset: convert dlm to use kset_createGreg Kroah-Hartman2008-01-241-11/+9
| | | | | | | | | Dynamically create the kset instead of declaring it statically. Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* kobject: remove struct kobj_type from struct ksetGreg Kroah-Hartman2008-01-241-4/+2
| | | | | | | | | | | | | | | | | We don't need a "default" ktype for a kset. We should set this explicitly every time for each kset. This change is needed so that we can make ksets dynamic, and cleans up one of the odd, undocumented assumption that the kset/kobject/ktype model has. This patch is based on a lot of help from Kay Sievers. Nasty bug in the block code was found by Dave Young <hidave.darkstar@gmail.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Dave Young <hidave.darkstar@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [DLM] lowcomms: Do not muck with sysctl_rmem_max.David S. Miller2007-11-071-5/+1
| | | | | | Use SO_RCVBUFFORCE instead. Signed-off-by: David S. Miller <davem@davemloft.net>
* Use helpers to obtain task pid in printksPavel Emelyanov2007-10-191-1/+1
| | | | | | | | | | | | | | | | The task_struct->pid member is going to be deprecated, so start using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in the kernel. The first thing to start with is the pid, printed to dmesg - in this case we may safely use task_pid_nr(). Besides, printks produce more (much more) than a half of all the explicit pid usage. [akpm@linux-foundation.org: git-drm went and changed lots of stuff] Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* menuconfig: transform NLS and DLM menusJan Engelhardt2007-10-171-6/+2
| | | | | | | | | | | Changes NLS and DLM menus into a 'menuconfig' object so that it can be disabled at once without having to enter the menu first to disable the config option. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6Linus Torvalds2007-10-121-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (75 commits) PM: merge device power-management source files sysfs: add copyrights kobject: update the copyrights kset: add some kerneldoc to help describe what these strange things are Driver core: rename ktype_edd and ktype_efivar Driver core: rename ktype_driver Driver core: rename ktype_device Driver core: rename ktype_class driver core: remove subsystem_init() sysfs: move sysfs file poll implementation to sysfs_open_dirent sysfs: implement sysfs_open_dirent sysfs: move sysfs_dirent->s_children into sysfs_dirent->s_dir sysfs: make sysfs_root a regular directory dirent sysfs: open code sysfs_attach_dentry() sysfs: make s_elem an anonymous union sysfs: make bin attr open get active reference of parent too sysfs: kill unnecessary NULL pointer check in sysfs_release() sysfs: kill unnecessary sysfs_get() in open paths sysfs: reposition sysfs_dirent->s_mode. sysfs: kill sysfs_update_file() ...
| * Drivers: clean up direct setting of the name of a ksetGreg Kroah-Hartman2007-10-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | A kset should not have its name set directly, so dynamically set the name at runtime. This is needed to remove the static array in the kobject structure which will be changed in a future patch. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | [DLM] block dlm_recv in recovery transitionDavid Teigland2007-10-1011-152/+161
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a per-lockspace rwsem that's held in read mode by dlm_recv threads while working in the dlm. This allows dlm_recv activity to be suspended when the lockspace transitions to, from and between recovery cycles. The specific bug prompting this change is one where an in-progress recovery cycle is aborted by a new recovery cycle. While dlm_recv was processing a recovery message, the recovery cycle was aborted and dlm_recoverd began cleaning up. dlm_recv decremented recover_locks_count on an rsb after dlm_recoverd had reset it to zero. This is fixed by suspending dlm_recv (taking write lock on the rwsem) before aborting the current recovery. The transitions to/from normal and recovery modes are simplified by using this new ability to block dlm_recv. The switch from normal to recovery mode means dlm_recv goes from processing locking messages, to saving them for later, and vice versa. Races are avoided by blocking dlm_recv when setting the flag that switches between modes. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* | [DLM] don't overwrite castparam if it's NULLPatrick Caulfield2007-10-101-2/+4
| | | | | | | | | | | | | | | | | | | | | | If the castaddr passed to the userland API is NULL then don't overwrite the existing castparam. This allows a different thread to cancel a lock request and the CANCEL AST gets delivered to the original thread. bz#306391 (for RHEL4) refers. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* | [DLM] Make dlm_sendd cond_resched morePatrick Caulfield2007-10-101-3/+4
| | | | | | | | | | | | | | | | | | | | Under high recovery loads dlm_sendd can monopolise the CPU and cause soft lockups. This one extra and one moved cond_resched() make it yield a little more during such times keeping work moving. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* | [DLM] Fix lowcomms socket closingPatrick Caulfield2007-10-101-12/+4
|/ | | | | | | | This patch fixes the slight mess made in lowcomms closing by previous patches and fixes all sorts of DLM hangs. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix basts for granted PR waiting CWDavid Teigland2007-08-141-14/+55
| | | | | | | | | | | | | | Fix a long standing bug where a blocking callback would be missed when there's a granted lock in PR mode and waiting locks in both PR and CW modes (and the PR lock was added to the waiting queue before the CW lock). The logic simply compared the numerical values of the modes to determine if a blocking callback was required, but in the one case of PR and CW, the lower valued CW mode blocks the higher valued PR mode. We just need to add a special check for this PR/CW case in the tests that decide when a blocking callback is needed. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] More othercon fixesPatrick Caulfield2007-08-141-10/+15
| | | | | | | | The last patch to clean out 'othercon' structures only fixed half the problem. The attached addresses the other situations too, and fixes bz#238490 Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Fix memory leak in dlm_add_member() when dlm_node_weight() returns ↵Jesper Juhl2007-08-141-1/+3
| | | | | | | | | | | | | | | | less than zero There's a memory leak in fs/dlm/member.c::dlm_add_member(). If "dlm_node_weight(ls->ls_name, nodeid)" returns < 0, then we'll return without freeing the memory allocated to the (at that point yet unused) 'memb'. This patch frees the allocated memory in that case and thus avoids the leak. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] zero unused parts of sockaddr_storagePatrick Caulfield2007-08-141-0/+1
| | | | | | | | | | When we build a sockaddr_storage for an IP address, clear the unused parts as they could be used for node comparisons. I have seen this occasionally make sctp connections fail. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix NULL ls usageDavid Teigland2007-08-141-4/+3
| | | | | | | | Fix regression in recent patch "[DLM] variable allocation" which attempts to dereference an "ls" struct when it's NULL. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Clear othercon pointers when a connection is closedPatrick Caulfield2007-08-141-0/+2
| | | | | | | | This patch clears the othercon pointer and frees the memory when a connnection is closed. This could cause a small memory leak when nodes leave the cluster. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* mm: Remove slab destructors from kmem_cache_create().Paul Mundt2007-07-202-2/+2
| | | | | | | | | | | | | | Slab destructors were no longer supported after Christoph's c59def9f222d44bb7e2f0a559f2906191a0862d7 change. They've been BUGs for both slab and slub, and slob never supported them either. This rips out support for the dtor pointer from kmem_cache_create() completely and fixes up every single callsite in the kernel (there were about 224, not including the slab allocator definitions themselves, or the documentation references). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* some kmalloc/memset ->kzalloc (tree wide)Yoann Padioleau2007-07-191-9/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc). Here is a short excerpt of the semantic patch performing this transformation: @@ type T2; expression x; identifier f,fld; expression E; expression E1,E2; expression e1,e2,e3,y; statement S; @@ x = - kmalloc + kzalloc (E1,E2) ... when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\) - memset((T2)x,0,E1); @@ expression E1,E2,E3; @@ - kzalloc(E1 * E2,E3) + kcalloc(E1,E2,E3) [akpm@linux-foundation.org: get kcalloc args the right way around] Signed-off-by: Yoann Padioleau <padator@wanadoo.fr> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <bryan.wu@analog.com> Acked-by: Jiri Slaby <jirislaby@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Acked-by: Roland Dreier <rolandd@cisco.com> Cc: Jiri Kosina <jkosina@suse.cz> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Acked-by: Pierre Ossman <drzeus-list@drzeus.cx> Cc: Jeff Garzik <jeff@garzik.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Greg KH <greg@kroah.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* configfs: Convert subsystem semaphore to mutexJoel Becker2007-07-101-5/+5
| | | | | | | | | | | | | | Convert the su_sem member of struct configfs_subsystem to a struct mutex, as that's what it is. Also convert all the users and update Documentation/configfs.txt and Documentation/configfs_example.c accordingly. [ Conflict in fs/dlm/config.c with commit 3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ] Inspired-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] configfs+dlm: Rename config_group_find_obj and state semantics clearlySatyam Sharma2007-07-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Configfs being based upon sysfs code, config_group_find_obj() is probably so named because of the similar kset_find_obj() in sysfs. However, "kobject"s in sysfs become "config_item"s in configfs, so let's call it config_group_find_item() instead, for sake of uniformity, and make corresponding change in the users of this function. BTW a crucial difference between kset_find_obj and config_group_find_item is in locking expectations. kset_find_obj does its locking by itself, but config_group_find_item expects the *caller* to do the locking. The reason for this: kset's have their own locks, config_group's don't but instead rely on the subsystem mutex. And, subsystem needn't necessarily be around when config_group_find_item() is called. So let's state these locking semantics explicitly, and rectify the comment, otherwise bugs could continue to occur in future, as they did in the past (refer commit d82b8191e238 in gfs2-2.6-fixes.git). [ I also took the opportunity to fix some bad whitespace and double-empty lines. --Joel ] [ Conflict in fs/dlm/config.c with commit 3168b0780d06ace875696f8a648d04d6089654e5 manually resolved. --Mark ] Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Cc: David Teigland <teigland@redhat.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [PATCH] configfs+dlm: Separate out __CONFIGFS_ATTR into configfs.hSatyam Sharma2007-07-101-8/+0
| | | | | | | | | | | | fs/dlm/config.c contains a useful generic macro called __CONFIGFS_ATTR that is similar to sysfs' __ATTR macro that makes defining attributes easy for any user of configfs. Separate it out into configfs.h so that other users (forthcoming in dynamic netconsole patchset) can use it too. Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Cc: David Teigland <teigland@redhat.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
* [DLM] dump more lock valuesDavid Teigland2007-07-092-41/+43
| | | | | | | | | Add two more output fields (lkb_flags and rsb nodeid) to the new debugfs file that dumps one lock per line. Also, dump all locks instead of just mastered locks. Accordingly, use a suffix of _locks instead of _master. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] git-gfs2-nmw-build-fixakpm@linux-foundation.org2007-07-091-1/+1
| | | | | | Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Telnet to port 21064 can stop all lockspacesPatrick Caulfield2007-07-091-4/+10
| | | | | | | | | | | This patch fixes Red Hat bz#245892 Opening a tcp connection from a cluster member to another cluster member targeting the dlm port it is enough to stop every dlm operation in the cluster. This means that GFS and rgmanager will hang. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] don't require FS flag on all nodesDavid Teigland2007-07-091-3/+4
| | | | | | | | | | Mask off the recently added DLM_LSFL_FS flag when setting the exflags. This way all the nodes in the lockspace aren't required to have the FS flag set, since we later check that exflags matches among all nodes. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] variable allocationPatrick Caulfield2007-07-094-5/+12
| | | | | | | | | | Add a new flag, DLM_LSFL_FS, to be used when a file system creates a lockspace. This flag causes the dlm to use GFP_NOFS for allocations instead of GFP_KERNEL. (This updated version of the patch uses gfp_t for ls_allocation.) Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-Off-By: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix reference countingJosef Bacik2007-07-091-0/+1
| | | | | | | | | | | | This is a fix for the patch 021d2ff3a08019260a1dc002793c92d6bf18afb6 I left off a dlm_hold_rsb which causes the box to panic if you try to use debugfs. This patch fixes the problem. Sorry about that, Signed-off-by: Josef Bacik <jwhiter@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix socket shutdownPatrick Caulfield2007-07-091-3/+6
| | | | | | | | | | This patch clears the user_data of active sockets as part of cleanup. This prevents any late-arriving data from trying to add jobs to the work queue while we are tidying up. Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-Off-By: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] show default protocolDavid Teigland2007-07-091-0/+1
| | | | | | | | | Display the initial value of the "protocol" config value in configfs. The default value has always been 0 in the past anyway, so it's always appeared to be correct. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] dumping master locksDavid Teigland2007-07-092-2/+163
| | | | | | | | | | | | | Add a new debugfs file that dumps a compact list of mastered locks. This will be used by a userland daemon to collect state for deadlock detection. Also, for the existing function that prints all lock state, lock the rsb before going through the lock lists since they can be changing in the course of normal dlm activity. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] canceling deadlocked lockDavid Teigland2007-07-094-0/+80
| | | | | | | | | Add a function that can be used through libdlm by a system daemon to cancel another process's deadlocked lock. A completion ast with EDEADLK is returned to the process waiting for the lock. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] timeout fixesDavid Teigland2007-07-095-28/+39
| | | | | | | | | | | | | | | | | | Various fixes related to the new timeout feature: - add_timeout() missed setting TIMEWARN flag on lkb's when the TIMEOUT flag was already set - clear_proc_locks should remove a dead process's locks from the timeout list - the end-of-life calculation for user locks needs to consider that ETIMEDOUT is equivalent to -DLM_ECANCEL - make initial default timewarn_cs config value visible in configfs - change bit position of TIMEOUT_CANCEL flag so it's not copied to a remote master node - set timestamp on remote lkb's so a lock dump will display the time they've been waiting Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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