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path: root/fs/ocfs2/dlm/userdlm.c
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2008-02-07ocfs2: Negotiate locking protocol versions.Joel Becker1-2/+3
Currently, when ocfs2 nodes connect via TCP, they advertise their compatibility level. If the versions do not match, two nodes cannot speak to each other and they disconnect. As a result, this provides no forward or backwards compatibility. This patch implements a simple protocol negotiation at the dlm level by introducing a major/minor version number scheme for entities that communicate. Specifically, o2dlm has a major/minor version for interaction with o2dlm on other nodes, and ocfs2 itself has a major/minor version for interacting with the filesystem on other nodes. This will allow rolling upgrades of ocfs2 clusters when changes to the locking or network protocols can be done in a backwards compatible manner. In those cases, only the minor number is changed and the negotatied protocol minor is returned from dlm join. In the far less likely event that a required protocol change makes backwards compatibility impossible, we simply bump the major number. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-11-22WorkStruct: make allyesconfigDavid Howells1-5/+5
Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
2006-09-25ocfs2: Update dlmfs for new dlmlock() APIMark Fasheh1-51/+30
We just need to add a namelen field to the user_lock_res structure, and update a few debug prints. Instead of updating all debug prints, I took the opportunity to remove a few that are likely unnecessary these days. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-06-27ocfs2: use GFP_NOFS in some dlm operationsKurt Hackel1-1/+1
Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-04-08ocfs2: test and set teardown flag early in user_dlm_destroy_lock()Mark Fasheh1-3/+14
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-04-08ocfs2: Handle the DLM_CANCELGRANT case in user_unlock_ast()Mark Fasheh1-12/+22
Remove the code which attempted to catch it via dlmunlock() return status - this never happens there. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-04-08ocfs2: catch an invalid ast case in dlmfsMark Fasheh1-0/+4
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-04-08ocfs2: remove an overly aggressive BUG() in dlmfsMark Fasheh1-4/+17
Don't BUG() user_dlm_unblock_lock() on the absence of the USER_LOCK_BLOCKED flag - this turns out to be a valid case. Make some of the related BUG() statements print more useful information. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-02-04[PATCH] ocfs2/dlm: fix compilation on ia64Jeff Mahoney1-1/+1
Including <asm/signal.h> results in compilation failure on ia64 due to not including <linux/compiler.h> Including <linux/signal.h> corrects the problem. Please apply. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2006-01-03[PATCH] OCFS2: The Second Oracle Cluster FilesystemMark Fasheh1-0/+658
dlmfs: A minimal dlm userspace interface implemented via a virtual file system. Most of the OCFS2 tools make use of this to take cluster locks when doing operations on the file system. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
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