Commit graph

11 commits

Author SHA1 Message Date
Steven Whitehouse
269cddd44e dlm: Fix dlm lock status block comment in dlm.h
There is only one place in the dlm where the sb_status is set
and that is queue_cast(). Tracing back the callers of that
function shows that the listed set of return values is
out of date, so here are an updated set.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
2010-09-07 14:17:10 -05:00
Geert Uytterhoeven
08ce4c91e4 dlm: Make name input parameter of {,dlm_}new_lockspace() const
| fs/gfs2/lock_dlm.c:207: warning: passing argument 1 of 'dlm_new_lockspace' discards qualifiers from pointer target type

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David Teigland <teigland@redhat.com>
2009-05-07 10:14:26 -05:00
David Teigland
0f8e0d9a31 dlm: allow multiple lockspace creates
Add a count for lockspace create and release so that create can
be called multiple times to use the lockspace from different places.
Also add the new flag DLM_LSFL_NEWEXCL to create a lockspace with
the previous behavior of returning -EEXIST if the lockspace already
exists.

Signed-off-by: David Teigland <teigland@redhat.com>
2008-08-28 11:49:15 -05:00
Mike Frysinger
c1c76743e9 dlm: linux/{dlm,dlm_device}.h: cleanup for userspace
linux/dlm_device.h uses types from dlm.h and types.h, so pull them in.  The
dlm.h header should use __u## rather than uint##_t types and thus pull in
linux/types.h for it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Teigland <teigland@redhat.com>
2008-04-21 11:35:39 -05:00
David Teigland
3d564fa347 dlm: common max length definitions
Add central definitions for max lockspace name length and max resource
name length.  The lack of central definitions has resulted in scattered
private definitions which we can now clean up, including an unused one
in dlm_device.h.

Signed-off-by: David Teigland <teigland@redhat.com>
2008-04-21 11:22:29 -05:00
Joel Becker
d69a3ad6a0 dlm: Split lock mode and flag constants into a sharable header.
This allows others to use the DLM constants without being tied to the
function API of fs/dlm.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25 14:46:04 -08:00
Patrick Caulfield
44f487a553 [DLM] variable allocation
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>
2007-07-09 08:23:17 +01:00
David Teigland
c85d65e914 [DLM] cancel in conversion deadlock [4/6]
When conversion deadlock is detected, cancel the conversion and return
EDEADLK to the application.  This is a new default behavior where before
the dlm would allow the deadlock to exist indefinately.

The DLM_LKF_NODLCKWT flag can now be used in a conversion to prevent the
dlm from performing conversion deadlock detection/cancelation on it.
The DLM_LKF_CONVDEADLK flag can continue to be used as before to tell the
dlm to demote the granted mode of the lock being converted if it gets into
a conversion deadlock.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-07-09 08:22:38 +01:00
David Teigland
3ae1acf93a [DLM] add lock timeouts and warnings [2/6]
New features: lock timeouts and time warnings.  If the DLM_LKF_TIMEOUT
flag is set, then the request/conversion will be canceled after waiting
the specified number of centiseconds (specified per lock).  This feature
is only available for locks requested through libdlm (can be enabled for
kernel dlm users if there's a use for it.)

If the new DLM_LSFL_TIMEWARN flag is set when creating the lockspace, then
a warning message will be sent to userspace (using genetlink) after a
request/conversion has been waiting for a given number of centiseconds
(configurable per node).  The time warnings will be used in the future
to do deadlock detection in userspace.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2007-07-09 08:22:33 +01:00
David Teigland
3bcd3687f8 [DLM] Remove range locks from the DLM
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>
2006-02-23 09:56:38 +00:00
David Teigland
e7fd41792f [DLM] The core of the DLM for GFS2/CLVM
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>
2006-01-18 09:30:29 +00:00