nfsd: lock owners are not per open stateid
In the NFSv4 spec, lock stateids are per-file objects. Lockowners are not.
This patch replaces the current list of lock owners in the open stateids
with a list of lock stateids.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 1e973f6..137fdcce 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -695,10 +695,11 @@
nfs4_free_stid(stateid_slab, &stp->st_stid);
}
-static void release_lock_stateid(struct nfs4_ol_stateid *stp)
+static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
{
struct file *file;
+ list_del(&stp->st_locks);
unhash_generic_stateid(stp);
unhash_stid(&stp->st_stid);
file = find_any_file(stp->st_file);
@@ -713,12 +714,11 @@
struct nfs4_ol_stateid *stp;
list_del(&lo->lo_owner.so_strhash);
- list_del(&lo->lo_perstateid);
list_del(&lo->lo_owner_ino_hash);
while (!list_empty(&lo->lo_owner.so_stateids)) {
stp = list_first_entry(&lo->lo_owner.so_stateids,
struct nfs4_ol_stateid, st_perstateowner);
- release_lock_stateid(stp);
+ __release_lock_stateid(stp);
}
}
@@ -734,22 +734,36 @@
nfs4_free_lockowner(lo);
}
-static void
-release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
+static void release_lockowner_if_empty(struct nfs4_lockowner *lo)
+{
+ if (list_empty(&lo->lo_owner.so_stateids))
+ release_lockowner(lo);
+}
+
+static void release_lock_stateid(struct nfs4_ol_stateid *stp)
{
struct nfs4_lockowner *lo;
- while (!list_empty(&open_stp->st_lockowners)) {
- lo = list_entry(open_stp->st_lockowners.next,
- struct nfs4_lockowner, lo_perstateid);
- release_lockowner(lo);
+ lo = lockowner(stp->st_stateowner);
+ __release_lock_stateid(stp);
+ release_lockowner_if_empty(lo);
+}
+
+static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp)
+{
+ struct nfs4_ol_stateid *stp;
+
+ while (!list_empty(&open_stp->st_locks)) {
+ stp = list_entry(open_stp->st_locks.next,
+ struct nfs4_ol_stateid, st_locks);
+ release_lock_stateid(stp);
}
}
static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
{
unhash_generic_stateid(stp);
- release_stateid_lockowners(stp);
+ release_open_stateid_locks(stp);
close_generic_stateid(stp);
}
@@ -2744,7 +2758,7 @@
struct nfs4_openowner *oo = open->op_openowner;
stp->st_stid.sc_type = NFS4_OPEN_STID;
- INIT_LIST_HEAD(&stp->st_lockowners);
+ INIT_LIST_HEAD(&stp->st_locks);
list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
list_add(&stp->st_perfile, &fp->fi_stateids);
stp->st_stateowner = &oo->oo_owner;
@@ -4335,7 +4349,6 @@
list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
- list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
}
/*
@@ -4380,6 +4393,7 @@
stp->st_access_bmap = 0;
stp->st_deny_bmap = open_stp->st_deny_bmap;
stp->st_openstp = open_stp;
+ list_add(&stp->st_locks, &open_stp->st_locks);
return stp;
}
@@ -4967,18 +4981,21 @@
printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
}
-static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *))
+static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
+ void (*func)(struct nfs4_ol_stateid *))
{
struct nfs4_openowner *oop;
- struct nfs4_lockowner *lop, *lo_next;
struct nfs4_ol_stateid *stp, *st_next;
+ struct nfs4_ol_stateid *lst, *lst_next;
u64 count = 0;
list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
- list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) {
- list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) {
+ list_for_each_entry_safe(stp, st_next,
+ &oop->oo_owner.so_stateids, st_perstateowner) {
+ list_for_each_entry_safe(lst, lst_next,
+ &stp->st_locks, st_locks) {
if (func)
- func(lop);
+ func(lst);
if (++count == max)
return count;
}
@@ -4990,7 +5007,7 @@
u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
{
- return nfsd_foreach_client_lock(clp, max, release_lockowner);
+ return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
}
u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)