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NFS: Add basic migration support to state manager thread

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Migration recovery and state recovery must be serialized, so handle
both in the state manager thread.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2013-10-17 14:13:02 -04:00
committed by Trond Myklebust
parent ce6cda1845
commit c9fdeb280b
4 changed files with 168 additions and 3 deletions
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7
include/linux/nfs_fs_sb.h
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@@ -79,6 +79,7 @@ struct nfs_client {
char cl_ipaddr[48];
u32 cl_cb_ident; /* v4.0 callback identifier */
const struct nfs4_minor_version_ops *cl_mvops;
unsigned long cl_mig_gen;
/* NFSv4.0 transport blocking */
struct nfs4_slot_table *cl_slot_tbl;
@@ -189,6 +190,12 @@ struct nfs_server {
struct list_head state_owners_lru;
struct list_head layouts;
struct list_head delegations;
unsigned long mig_gen;
unsigned long mig_status;
#define NFS_MIG_IN_TRANSITION (1)
#define NFS_MIG_FAILED (2)
void (*destroy)(struct nfs_server *);
atomic_t active; /* Keep trace of any activity to this server */