diff options
| 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/dlm_internal.h | |
| parent | f95a34c66554235b70a681fcd9feebc195f7ec0e (diff) | |
| download | linux-757a42719635495779462514458bbfbf12a37dac.tar.gz linux-757a42719635495779462514458bbfbf12a37dac.tar.xz | |
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/dlm_internal.h')
| -rw-r--r-- | fs/dlm/dlm_internal.h | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index 5685a9a5dba2..f4d132c76908 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -117,6 +117,18 @@ struct dlm_member { struct list_head list; int nodeid; int weight; + int slot; + int slot_prev; + uint32_t generation; +}; + +/* + * low nodeid saves array of these in ls_slots + */ + +struct dlm_slot { + int nodeid; + int slot; }; /* @@ -337,7 +349,9 @@ static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) /* dlm_header is first element of all structs sent between nodes */ #define DLM_HEADER_MAJOR 0x00030000 -#define DLM_HEADER_MINOR 0x00000000 +#define DLM_HEADER_MINOR 0x00000001 + +#define DLM_HEADER_SLOTS 0x00000001 #define DLM_MSG 1 #define DLM_RCOM 2 @@ -425,10 +439,34 @@ union dlm_packet { struct dlm_rcom rcom; }; +#define DLM_RSF_NEED_SLOTS 0x00000001 + +/* RCOM_STATUS data */ +struct rcom_status { + __le32 rs_flags; + __le32 rs_unused1; + __le64 rs_unused2; +}; + +/* RCOM_STATUS_REPLY data */ struct rcom_config { __le32 rf_lvblen; __le32 rf_lsflags; - __le64 rf_unused; + + /* DLM_HEADER_SLOTS adds: */ + __le32 rf_flags; + __le16 rf_our_slot; + __le16 rf_num_slots; + __le32 rf_generation; + __le32 rf_unused1; + __le64 rf_unused2; +}; + +struct rcom_slot { + __le32 ro_nodeid; + __le16 ro_slot; + __le16 ro_unused1; + __le64 ro_unused2; }; struct rcom_lock { @@ -455,6 +493,7 @@ struct dlm_ls { struct list_head ls_list; /* list of lockspaces */ dlm_lockspace_t *ls_local_handle; uint32_t ls_global_id; /* global unique lockspace ID */ + uint32_t ls_generation; uint32_t ls_exflags; int ls_lvblen; int ls_count; /* refcount of processes in @@ -493,6 +532,11 @@ struct dlm_ls { int ls_total_weight; int *ls_node_array; + int ls_slot; + int ls_num_slots; + int ls_slots_size; + struct dlm_slot *ls_slots; + struct dlm_rsb ls_stub_rsb; /* for returning errors */ struct dlm_lkb ls_stub_lkb; /* for returning errors */ struct dlm_message ls_stub_ms; /* for faking a reply */ |