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nfsd4: clean up open owners on OPEN failure

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If process_open1() creates a new open owner, but the open later fails,
the current code will leave the open owner around.  It won't be on the
close_lru list, and the client isn't expected to send a CLOSE, so it
will hang around as long as the client does.

Similarly, if process_open1() removes an existing open owner from the
close lru, anticipating that an open owner that previously had no
associated stateid's now will, but the open subsequently fails, then
we'll again be left with the same leak.

Fix both problems.

Reported-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields
2011-10-13 15:12:59 -04:00
parent bcf130f9df
commit d29b20cd58
4 changed files with 21 additions and 2 deletions
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20
fs/nfsd/nfs4state.c
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@@ -2320,7 +2320,7 @@ alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, str
return NULL;
oo->oo_owner.so_is_open_owner = 1;
oo->oo_owner.so_seqid = open->op_seqid;
oo->oo_flags = 0;
oo->oo_flags = NFS4_OO_NEW;
oo->oo_time = 0;
oo->oo_last_closed_stid = NULL;
INIT_LIST_HEAD(&oo->oo_close_lru);
@@ -2526,7 +2526,6 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
open->op_openowner = NULL;
goto new_owner;
}
list_del_init(&oo->oo_close_lru);
return nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid);
new_owner:
oo = alloc_init_open_stateowner(strhashval, clp, open);
@@ -2946,6 +2945,23 @@ out:
return status;
}
void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
{
if (open->op_openowner) {
struct nfs4_openowner *oo = open->op_openowner;
if (!list_empty(&oo->oo_owner.so_stateids))
list_del_init(&oo->oo_close_lru);
if (oo->oo_flags & NFS4_OO_NEW) {
if (status) {
release_openowner(oo);
open->op_openowner = NULL;
} else
oo->oo_flags &= ~NFS4_OO_NEW;
}
}
}
__be32
nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
clientid_t *clid)