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NFSv4: Fix state reference counting in _nfs4_opendata_reclaim_to_nfs4_state 

Currently, if the call to nfs_refresh_inode fails, then we end up leaking
a reference count, due to the call to nfs4_get_open_state.
While we're at it, replace nfs4_get_open_state with a simple call to
atomic_inc(); there is no need to do a full lookup of the struct nfs_state
since it is passed as an argument in the struct nfs4_opendata, and
is already assigned to the variable 'state'.

Cc: stable@vger.kernel.org # 3.7.x: a43ec98b72a: NFSv4: don't fail on missing
Cc: stable@vger.kernel.org # 3.7.x
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-10-28 14:57:12 -04:00
parent a43ec98b72
commit d49f042aee
1 changed files with 1 additions and 5 deletions
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6
fs/nfs/nfs4proc.c
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@ -1323,11 +1323,6 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
goto err;
}
ret = -ENOMEM;
state = nfs4_get_open_state(inode, data->owner);
if (state == NULL)
goto err;
ret = nfs_refresh_inode(inode, &data->f_attr);
if (ret)
goto err;
@ -1336,6 +1331,7 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
nfs4_opendata_check_deleg(data, state);
update_open_stateid(state, &data->o_res.stateid, NULL,
data->o_arg.fmode);
atomic_inc(&state->count);
return state;
err: