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* [DLM] clear sbflags on lock masterDavid Teigland2006-11-301-0/+1
| | | | | | | | | | | | | | | RH BZ 211622 The ALTMODE flag can be set in the lock master's copy of the lock but never cleared, so ALTMODE will also be returned in a subsequent conversion of the lock when it shouldn't be. This results in lock_dlm incorrectly switching to the alternate lock mode when returning the result to gfs which then asserts when it sees the wrong lock state. The fix is to propagate the cleared sbflags value to the master node when the lock is requested. QA's d_rwrandirectlarge test triggers this bug very quickly. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix requestqueue raceDavid Teigland2006-11-301-4/+11
| | | | | | | | | | | | | | | Red Hat BZ 211914 There's a race between dlm_recoverd (1) enabling locking and (2) clearing out the requestqueue, and dlm_recvd (1) checking if locking is enabled and (2) adding a message to the requestqueue. An order of recoverd(1), recvd(1), recvd(2), recoverd(2) will result in a message being left on the requestqueue. The fix is to have dlm_recvd check if dlm_recoverd has enabled locking after taking the mutex for the requestqueue and if it has processing the message instead of queueing it. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2/DLM] Fix trailing whitespaceSteven Whitehouse2006-09-251-1/+1
| | | | | | | As per Andrew Morton's request, removed trailing whitespace. Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] confirm master for recovered waiting requestsDavid Teigland2006-09-081-0/+2
| | | | | | | | | | | | | | | | Fixing the following scenario: - A request is on the waiters list waiting for a reply from a remote node. - The request is the first one on the resource, so first_lkid is set. - The remote node fails causing recovery. - During recovery the requesting node becomes master. - The request is now processed locally instead of being a remote operation. - At this point we need to call confirm_master() on the resource since we're certain we're now the master node. This will clear first_lkid. - We weren't calling confirm_master(), so first_lkid was not being cleared causing subsequent requests on that resource to get stuck. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] down conversion clearing flagsDavid Teigland2006-08-231-5/+4
| | | | | | | | | | | The down-conversion optimization was resulting in the lkb flags being cleared because the stub message reply had no flags value set. Copy the current flags into the stub message so they'll be copied back into the lkb as part of processing the fake reply. Also add an assertion to catch this error more directly if it exists elsewhere. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] down conversion clearing flagsPatrick Caulfield2006-08-231-0/+1
| | | | | | | | | Oh, and here's (hopefully) the last of these ua_tmp patches. I think I've caught all the paths now. Sorry it didn't make the last one. Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] preserve lksb address in user conversionsPatrick Caulfield2006-08-231-0/+1
| | | | | | | | | This patch fixes bz#203444 where the LKSB was lost during userland conversion operations Signed-off-by: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] dump rsb and locks on assertDavid Teigland2006-08-211-9/+31
| | | | | | | | | Introduce new function dlm_dump_rsb() to call within assertions instead of dlm_print_rsb(). The new function dumps info about all locks on the rsb in addition to rsb details. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix userland unlockPatrick Caulfield2006-08-081-0/+1
| | | | | | | | | | | | This patch fixes the userland DLM unlock code so that it correctly returns the address of the userland lock status block in its completion AST. It fixes bug #201348 Patrick Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] schedule during long loop through locksDavid Teigland2006-07-261-0/+1
| | | | | | | | The loop through all waiting locks in recover_waiters can potentially be long, so we should schedule explicitly. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix loop in grant_after_purgeDavid Teigland2006-07-261-4/+9
| | | | | | | | | | The loop in grant_after_purge is intended to find all rsb's in each hash bucket that have the LOCKS_PURGED flag set. The loop was quitting the current bucket after finding just one rsb instead of going until there are no more. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] fix leaking user locksDavid Teigland2006-07-201-3/+4
| | | | | | | | User NOQUEUE lock requests to a remote node that failed with -EAGAIN were never being removed from a process's list of locks. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] [RFC: -mm patch] fs/dlm/lock.c: unexport dlm_lvb_operationsAdrian Bunk2006-07-201-1/+0
| | | | | | | | | | | | | | | | On Thu, Jul 13, 2006 at 10:48:00PM -0700, Andrew Morton wrote: >... > Changes since 2.6.18-rc1-mm1: >... > git-gfs2.patch >... > git trees. >... This patch removes the unused EXPORT_SYMBOL_GPL(dlm_lvb_operations). Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] dlm: user locksDavid Teigland2006-07-131-6/+298
| | | | | | | | | | | | This changes the way the dlm handles user locks. The core dlm is now aware of user locks so they can be dealt with more efficiently. There is no more dlm_device module which previously managed its own duplicate copy of every user lock. 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 grant_after_purge softlockupDavid Teigland2006-05-021-14/+28
| | | | | | | | | | | In dlm_grant_after_purge() we were holding a hash table read_lock while calling put_rsb() which potentially removes the rsb from the hash table, taking the same lock in write. Fix this by flagging rsb's ahead of time that have been purged. Then iteratively read_lock the hash table, find a flagged rsb, unlock, process rsb. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Pass in lockspace to lkb put functionDavid Teigland2006-02-281-23/+31
| | | | | | | | In some cases a lockspace isn't attached to the lkb, so that it needs to be passed directly to the lkb put function. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Remove range locks from the DLMDavid Teigland2006-02-231-94/+9
| | | | | | | This patch removes support for range locking from the DLM Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [DLM] Update DLM to the latest patch levelDavid Teigland2006-01-201-36/+36
| | | | | Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steve Whitehouse <swhiteho@redhat.com>
* [DLM] The core of the DLM for GFS2/CLVMDavid Teigland2006-01-181-0/+3610
This is the core of the distributed lock manager which is required to use GFS2 as a cluster filesystem. It is also used by CLVM and can be used as a standalone lock manager independantly of either of these two projects. It implements VAX-style locking modes. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steve Whitehouse <swhiteho@redhat.com>
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