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NFS: Add migration recovery callouts in nfs4proc.c 

When a server returns NFS4ERR_MOVED, trigger the new migration
recovery logic in the state manager.

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 14:13:19 -04:00 committed by Trond Myklebust
parent 9f51a78e3a
commit 519ae255d4
1 changed files with 20 additions and 2 deletions
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22
fs/nfs/nfs4proc.c
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@ -384,6 +384,11 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
case -NFS4ERR_STALE_CLIENTID:
nfs4_schedule_lease_recovery(clp);
goto wait_on_recovery;
case -NFS4ERR_MOVED:
ret = nfs4_schedule_migration_recovery(server);
if (ret < 0)
break;
goto wait_on_recovery;
#if defined(CONFIG_NFS_V4_1)
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
@ -431,6 +436,8 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
return nfs4_map_errors(ret);
wait_on_recovery:
ret = nfs4_wait_clnt_recover(clp);
if (test_bit(NFS_MIG_FAILED, &server->mig_status))
return -EIO;
if (ret == 0)
exception->retry = 1;
return ret;
@ -2974,11 +2981,16 @@ static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
status = nfs4_proc_fs_locations(client, dir, name, locations, page);
if (status != 0)
goto out;
/* Make sure server returned a different fsid for the referral */
/*
* If the fsid didn't change, this is a migration event, not a
* referral. Cause us to drop into the exception handler, which
* will kick off migration recovery.
*/
if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
dprintk("%s: server did not return a different fsid for"
" a referral at %s\n", __func__, name->name);
status = -EIO;
status = -NFS4ERR_MOVED;
goto out;
}
/* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
@ -4739,6 +4751,10 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
case -NFS4ERR_STALE_CLIENTID:
nfs4_schedule_lease_recovery(clp);
goto wait_on_recovery;
case -NFS4ERR_MOVED:
if (nfs4_schedule_migration_recovery(server) < 0)
goto recovery_failed;
goto wait_on_recovery;
#if defined(CONFIG_NFS_V4_1)
case -NFS4ERR_BADSESSION:
case -NFS4ERR_BADSLOT:
@ -4769,6 +4785,8 @@ wait_on_recovery:
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
if (test_bit(NFS_MIG_FAILED, &server->mig_status))
goto recovery_failed;
restart_call:
task->tk_status = 0;
return -EAGAIN;