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NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU 

If a LOCKU request receives a NFS4ERR_OLD_STATEID, then bump the
seqid before resending. Ensure we only bump the seqid by 1.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
alistair/sunxi64-5.4-dsi
Trond Myklebust 2019-09-20 07:23:48 -04:00 committed by Anna Schumaker
parent 0e0cb35b41
commit 32c6e7eee3
1 changed files with 48 additions and 5 deletions
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53
fs/nfs/nfs4proc.c
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@ -6410,6 +6410,42 @@ static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *
return err;
}
/*
* Update the seqid of a lock stateid after receiving
* NFS4ERR_OLD_STATEID
*/
static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
struct nfs4_lock_state *lsp)
{
struct nfs4_state *state = lsp->ls_state;
bool ret = false;
spin_lock(&state->state_lock);
if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
goto out;
if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
nfs4_stateid_seqid_inc(dst);
else
dst->seqid = lsp->ls_stateid.seqid;
ret = true;
out:
spin_unlock(&state->state_lock);
return ret;
}
static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
struct nfs4_lock_state *lsp)
{
struct nfs4_state *state = lsp->ls_state;
bool ret;
spin_lock(&state->state_lock);
ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
nfs4_stateid_copy(dst, &lsp->ls_stateid);
spin_unlock(&state->state_lock);
return ret;
}
struct nfs4_unlockdata {
struct nfs_locku_args arg;
struct nfs_locku_res res;
@ -6427,7 +6463,8 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
struct nfs_seqid *seqid)
{
struct nfs4_unlockdata *p;
struct inode *inode = lsp->ls_state->inode;
struct nfs4_state *state = lsp->ls_state;
struct inode *inode = state->inode;
p = kzalloc(sizeof(*p), GFP_NOFS);
if (p == NULL)
@ -6443,6 +6480,9 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
locks_init_lock(&p->fl);
locks_copy_lock(&p->fl, fl);
p->server = NFS_SERVER(inode);
spin_lock(&state->state_lock);
nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
spin_unlock(&state->state_lock);
return p;
}
@ -6481,10 +6521,14 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
task->tk_msg.rpc_cred);
/* Fall through */
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_STALE_STATEID:
if (!nfs4_stateid_match(&calldata->arg.stateid,
&calldata->lsp->ls_stateid))
if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
calldata->lsp))
rpc_restart_call_prepare(task);
break;
case -NFS4ERR_OLD_STATEID:
if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
calldata->lsp))
rpc_restart_call_prepare(task);
break;
default:
@ -6507,7 +6551,6 @@ static void nfs4_locku_prepare(struct rpc_task *task, void *data)
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
goto out_wait;
nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
/* Note: exit _without_ running nfs4_locku_done */
goto out_no_action;