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RW Replication: Add basic definitions

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Add some basic definitions that will be needed to handle RW
replicas.

A new volume type RWREPL is added.  Replicas will share the same
volume ID as the RW volume, so the array of volume IDs by volume
type is unchanged, as is the VLDB entry format.

A new flag bit ITSRWREPL/VLSF_RWREPLICA for serverFlags identifies
RW replica sites in VLDB entries.

Change-Id: I882b238f34e682ebea782e11dc418ae1340d4546
Reviewed-on: http://gerrit.openafs.org/6676
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Simon Wilkinson <simonxwilkinson@gmail.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
This commit is contained in:
Marc Dionne 2012-01-18 14:04:28 -05:00 committed by Derrick Brashear
parent e93786b01b
commit 5815967253
3 changed files with 6 additions and 1 deletions
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1
src/vlserver/vldbint.xg
View File

@ -195,6 +195,7 @@ const VLOP_DUMP = 0x100;
%#define VLSF_BACKVOL 0x08
%#define VLSF_UUID 0x10
%#define VLSF_DONTUSE 0x20
%#define VLSF_RWREPLICA 0x40 /* Volume is a RW replica */
typedef vldbentry bulkentries<>;
typedef nvldbentry nbulkentries<>;

4
src/vol/voldefs.h
View File

@ -20,12 +20,14 @@
#define readwriteVolume RWVOL
#define readonlyVolume ROVOL
#define backupVolume BACKVOL
#define rwreplicaVolume RWREPL
#define RWVOL 0
#define ROVOL 1
#define BACKVOL 2
#define RWREPL 3
#define VOLMAXTYPES 3 /* _current_ max number of types */
#define VOLMAXTYPES 4 /* _current_ max number of types */
/* the maximum number of volumes in a volume group that we can handle */
#define VOL_VG_MAX_VOLS 20

2
src/volser/volser.p.h
View File

@ -35,6 +35,7 @@
#define volser_RW 0
#define volser_RO 1
#define volser_BACK 2
#define volser_RWREPL 3
#define THOLD(tt) ((tt)->refCount++)
@ -152,6 +153,7 @@ struct partList { /*used by the backup system */
#define ITSROVOL 0x02
#define ITSRWVOL 0x04
#define ITSBACKVOL 0x08
#define ITSRWREPL 0x10
#define RO_DONTUSE 0x20
#define VLOP_RESTORE 0x100 /*this is bogus, clashes with VLOP_DUMP */