From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
When we remove the client_mutex, we'll need to be able to ensure that
these objects aren't destroyed while we're not holding locks.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3e55df0d7504..76d28be3ef41 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -883,8 +883,10 @@ static void close_generic_stateid(struct nfs4_ol_stateid *stp)
release_all_access(stp);
}
-static void free_generic_stateid(struct nfs4_ol_stateid *stp)
+static void put_generic_stateid(struct nfs4_ol_stateid *stp)
{
+ if (!atomic_dec_and_test(&stp->st_stid.sc_count))
+ return;
if (stp->st_file)
put_nfs4_file(stp->st_file);
remove_stid(&stp->st_stid);
@@ -902,7 +904,7 @@ static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
if (file)
filp_close(file, (fl_owner_t)lockowner(stp->st_stateowner));
close_generic_stateid(stp);
- free_generic_stateid(stp);
+ put_generic_stateid(stp);
}
static void unhash_lockowner(struct nfs4_lockowner *lo)
@@ -965,7 +967,7 @@ static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
static void release_open_stateid(struct nfs4_ol_stateid *stp)
{
unhash_open_stateid(stp);
- free_generic_stateid(stp);
+ put_generic_stateid(stp);
}
static void unhash_openowner(struct nfs4_openowner *oo)
@@ -986,7 +988,7 @@ static void release_last_closed_stateid(struct nfs4_openowner *oo)
struct nfs4_ol_stateid *s = oo->oo_last_closed_stid;
if (s) {
- free_generic_stateid(s);
+ put_generic_stateid(s);
oo->oo_last_closed_stid = NULL;
}
}
@@ -3823,7 +3825,7 @@ void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status)
if (open->op_file)
nfsd4_free_file(open->op_file);
if (open->op_stp)
- free_generic_stateid(open->op_stp);
+ put_generic_stateid(open->op_stp);
}
__be32
@@ -4482,9 +4484,9 @@ static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s)
unhash_open_stateid(s);
if (clp->cl_minorversion) {
- free_generic_stateid(s);
if (list_empty(&oo->oo_owner.so_stateids))
release_openowner(oo);
+ put_generic_stateid(s);
} else {
if (s->st_file) {
put_nfs4_file(s->st_file);
--
1.9.3
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