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authorChuck Lever <chuck.lever@oracle.com>2013-10-17 14:13:19 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-10-28 15:25:23 -0400
commit519ae255d403219fd5375de13c95dea3ef1cfda0 (patch)
tree5357dbbdbc9bf9eb05bdc2d192ec1b7124e010df /fs/nfs
parent9f51a78e3a637a5923c661d2abe958c63441696f (diff)
downloadlinux-519ae255d403219fd5375de13c95dea3ef1cfda0.tar.bz2
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>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index fa87f81527b3..a1f620950f11 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -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;