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NFSv4: Add recovery for individual stateids
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NFSv4 defines a number of state errors which the client does not currently
handle. Among those we should worry about are:
  NFS4ERR_ADMIN_REVOKED - the server's administrator revoked our locks
  			  and/or delegations.
  NFS4ERR_BAD_STATEID - the client and server are out of sync, possibly
                        due to a delegation return racing with an OPEN
			request.
  NFS4ERR_OPENMODE - the client attempted to do something not sanctioned
  		     by the open mode of the stateid. Should normally just
		     occur as a result of a delegation return race.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Trond Myklebust authored and Trond Myklebust committed Dec 23, 2008
1 parent 95d35cb commit 9e33bed
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Showing 3 changed files with 31 additions and 10 deletions.
2 changes: 2 additions & 0 deletions fs/nfs/nfs4_fs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -169,6 +169,7 @@ struct nfs4_state {
struct nfs4_exception {
long timeout;
int retry;
struct nfs4_state *state;
};

struct nfs4_state_recovery_ops {
Expand Down Expand Up @@ -226,6 +227,7 @@ extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
extern void nfs4_close_sync(struct path *, struct nfs4_state *, mode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
Expand Down
37 changes: 28 additions & 9 deletions fs/nfs/nfs4proc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@
struct nfs4_opendata;
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);

Expand Down Expand Up @@ -235,12 +235,19 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_state *state = exception->state;
int ret = errorcode;

exception->retry = 0;
switch(errorcode) {
case 0:
return 0;
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;
nfs4_state_mark_reclaim_nograce(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
Expand Down Expand Up @@ -1320,10 +1327,13 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
renew_lease(server, calldata->timestamp);
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_EXPIRED:
break;
if (calldata->arg.open_flags == 0)
break;
default:
if (nfs4_async_handle_error(task, server) == -EAGAIN) {
if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
rpc_restart_call(task);
return;
}
Expand Down Expand Up @@ -1418,6 +1428,7 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
if (calldata->arg.seqid == NULL)
goto out_free_calldata;
calldata->arg.open_flags = 0;
calldata->arg.bitmask = server->attr_bitmask;
calldata->res.fattr = &calldata->fattr;
calldata->res.seqid = calldata->arg.seqid;
Expand Down Expand Up @@ -2064,7 +2075,7 @@ static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
struct nfs_removeres *res = task->tk_msg.rpc_resp;

if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
return 0;
update_changeattr(dir, &res->cinfo);
nfs_post_op_update_inode(dir, &res->dir_attr);
Expand Down Expand Up @@ -2492,7 +2503,7 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
struct nfs_server *server = NFS_SERVER(data->inode);

if (nfs4_async_handle_error(task, server) == -EAGAIN) {
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
rpc_restart_call(task);
return -EAGAIN;
}
Expand All @@ -2513,7 +2524,7 @@ static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->inode;

if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
rpc_restart_call(task);
return -EAGAIN;
}
Expand All @@ -2539,7 +2550,7 @@ static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->inode;

if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
rpc_restart_call(task);
return -EAGAIN;
}
Expand Down Expand Up @@ -2832,13 +2843,19 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen
}

static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
{
struct nfs_client *clp = server->nfs_client;

if (!clp || task->tk_status >= 0)
return 0;
switch(task->tk_status) {
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;
nfs4_state_mark_reclaim_nograce(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
Expand Down Expand Up @@ -3195,11 +3212,13 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
sizeof(calldata->lsp->ls_stateid.data));
renew_lease(calldata->server, calldata->timestamp);
break;
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
break;
default:
if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
rpc_restart_call(task);
}
}
Expand Down
2 changes: 1 addition & 1 deletion fs/nfs/nfs4state.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -824,7 +824,7 @@ static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_st
return 1;
}

static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state)
int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state)
{
set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags);
clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags);
Expand Down

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