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-rw-r--r--fs/nfsd/nfs4state.c70
1 files changed, 42 insertions, 28 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 49a9741fa132..6d5993caf9bc 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5722,14 +5722,22 @@ find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp)
return NULL;
}
-static void
+static struct nfs4_ol_stateid *
init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
struct nfs4_file *fp, struct inode *inode,
struct nfs4_ol_stateid *open_stp)
{
struct nfs4_client *clp = lo->lo_owner.so_client;
+ struct nfs4_ol_stateid *retstp;
- lockdep_assert_held(&clp->cl_lock);
+ mutex_init(&stp->st_mutex);
+ mutex_lock(&stp->st_mutex);
+retry:
+ spin_lock(&clp->cl_lock);
+ spin_lock(&fp->fi_lock);
+ retstp = find_lock_stateid(lo, fp);
+ if (retstp)
+ goto out_unlock;
refcount_inc(&stp->st_stid.sc_count);
stp->st_stid.sc_type = NFS4_LOCK_STID;
@@ -5739,12 +5747,22 @@ init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo,
stp->st_access_bmap = 0;
stp->st_deny_bmap = open_stp->st_deny_bmap;
stp->st_openstp = open_stp;
- mutex_init(&stp->st_mutex);
list_add(&stp->st_locks, &open_stp->st_locks);
list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids);
- spin_lock(&fp->fi_lock);
list_add(&stp->st_perfile, &fp->fi_stateids);
+out_unlock:
spin_unlock(&fp->fi_lock);
+ spin_unlock(&clp->cl_lock);
+ if (retstp) {
+ if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) {
+ nfs4_put_stid(&retstp->st_stid);
+ goto retry;
+ }
+ /* To keep mutex tracking happy */
+ mutex_unlock(&stp->st_mutex);
+ stp = retstp;
+ }
+ return stp;
}
static struct nfs4_ol_stateid *
@@ -5757,26 +5775,25 @@ find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi,
struct nfs4_openowner *oo = openowner(ost->st_stateowner);
struct nfs4_client *clp = oo->oo_owner.so_client;
+ *new = false;
spin_lock(&clp->cl_lock);
lst = find_lock_stateid(lo, fi);
- if (lst == NULL) {
- spin_unlock(&clp->cl_lock);
- ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid);
- if (ns == NULL)
- return NULL;
-
- spin_lock(&clp->cl_lock);
- lst = find_lock_stateid(lo, fi);
- if (likely(!lst)) {
- lst = openlockstateid(ns);
- init_lock_stateid(lst, lo, fi, inode, ost);
- ns = NULL;
- *new = true;
- }
- }
spin_unlock(&clp->cl_lock);
- if (ns)
+ if (lst != NULL) {
+ if (nfsd4_lock_ol_stateid(lst) == nfs_ok)
+ goto out;
+ nfs4_put_stid(&lst->st_stid);
+ }
+ ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid);
+ if (ns == NULL)
+ return NULL;
+
+ lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost);
+ if (lst == openlockstateid(ns))
+ *new = true;
+ else
nfs4_put_stid(ns);
+out:
return lst;
}
@@ -5828,17 +5845,12 @@ lookup_or_create_lock_state(struct nfsd4_compound_state *cstate,
goto out;
}
-retry:
lst = find_or_create_lock_stateid(lo, fi, inode, ost, new);
if (lst == NULL) {
status = nfserr_jukebox;
goto out;
}
- if (nfsd4_lock_ol_stateid(lst) != nfs_ok) {
- nfs4_put_stid(&lst->st_stid);
- goto retry;
- }
status = nfs_ok;
*plst = lst;
out:
@@ -6044,14 +6056,16 @@ out:
seqid_mutating_err(ntohl(status)))
lock_sop->lo_owner.so_seqid++;
- mutex_unlock(&lock_stp->st_mutex);
-
/*
* If this is a new, never-before-used stateid, and we are
* returning an error, then just go ahead and release it.
*/
- if (status && new)
+ if (status && new) {
+ lock_stp->st_stid.sc_type = NFS4_CLOSED_STID;
release_lock_stateid(lock_stp);
+ }
+
+ mutex_unlock(&lock_stp->st_mutex);
nfs4_put_stid(&lock_stp->st_stid);
}