kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

NFSv4: Don't add a new lock on an interrupted wait for LOCK

Browse source 
If the wait for a LOCK operation is interrupted, and then the file is
closed, the locks cleanup code will assume that no new locks will be added
to the inode after it has completed.  We already have a mechanism to detect
if there was signal, so let's use that to avoid recreating the local lock
once the RPC completes.  Also skip re-sending the LOCK operation for the
various error cases if we were signaled.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
[Trond: Fix inverted test of locks_lock_inode_wait()]
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Benjamin Coddington 2018-05-03 07:12:57 -04:00 committed by Trond Myklebust
parent cf61eb2686
commit a3cf9bca2a
1 changed files with 14 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
fs/nfs/nfs4proc.c
View file

@ -6417,32 +6417,36 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
case 0:
renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
data->timestamp);
if (data->arg.new_lock) {
if (data->arg.new_lock && !data->cancelled) {
data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
rpc_restart_call_prepare(task);
if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
break;
}
}
if (data->arg.new_lock_owner != 0) {
nfs_confirm_seqid(&lsp->ls_seqid, 0);
nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
} else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
rpc_restart_call_prepare(task);
goto out_done;
} else if (nfs4_update_lock_stateid(lsp, &data->res.stateid))
goto out_done;
break;
case -NFS4ERR_BAD_STATEID:
case -NFS4ERR_OLD_STATEID:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
if (data->arg.new_lock_owner != 0) {
if (!nfs4_stateid_match(&data->arg.open_stateid,
if (nfs4_stateid_match(&data->arg.open_stateid,
&lsp->ls_state->open_stateid))
rpc_restart_call_prepare(task);
} else if (!nfs4_stateid_match(&data->arg.lock_stateid,
goto out_done;
} else if (nfs4_stateid_match(&data->arg.lock_stateid,
&lsp->ls_stateid))
rpc_restart_call_prepare(task);
goto out_done;
}
if (!data->cancelled)
rpc_restart_call_prepare(task);
out_done:
dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
}