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| author | David Teigland <teigland@redhat.com> | 2011-10-20 13:26:28 -0500 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2012-01-04 08:55:57 -0600 |
| commit | 757a42719635495779462514458bbfbf12a37dac (patch) | |
| tree | be6ea155fc54c397cb57eb193b81824b37989e56 /fs/dlm/member.h | |
| parent | f95a34c66554235b70a681fcd9feebc195f7ec0e (diff) | |
| download | lwn-757a42719635495779462514458bbfbf12a37dac.tar.gz lwn-757a42719635495779462514458bbfbf12a37dac.zip | |
dlm: add node slots and generation
Slot numbers are assigned to nodes when they join the lockspace.
The slot number chosen is the minimum unused value starting at 1.
Once a node is assigned a slot, that slot number will not change
while the node remains a lockspace member. If the node leaves
and rejoins it can be assigned a new slot number.
A new generation number is also added to a lockspace. It is
set and incremented during each recovery along with the slot
collection/assignment.
The slot numbers will be passed to gfs2 which will use them as
journal id's.
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/member.h')
| -rw-r--r-- | fs/dlm/member.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/dlm/member.h b/fs/dlm/member.h index 7a26fca1e0b5..7e87e8a79dfd 100644 --- a/fs/dlm/member.h +++ b/fs/dlm/member.h @@ -20,6 +20,13 @@ void dlm_clear_members_gone(struct dlm_ls *ls); int dlm_recover_members(struct dlm_ls *ls, struct dlm_recover *rv,int *neg_out); int dlm_is_removed(struct dlm_ls *ls, int nodeid); int dlm_is_member(struct dlm_ls *ls, int nodeid); +int dlm_slots_version(struct dlm_header *h); +void dlm_slot_save(struct dlm_ls *ls, struct dlm_rcom *rc, + struct dlm_member *memb); +void dlm_slots_copy_out(struct dlm_ls *ls, struct dlm_rcom *rc); +int dlm_slots_copy_in(struct dlm_ls *ls); +int dlm_slots_assign(struct dlm_ls *ls, int *num_slots, int *slots_size, + struct dlm_slot **slots_out, uint32_t *gen_out); #endif /* __MEMBER_DOT_H__ */ |