From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
fs/nfsd/nfs4state.c | 53 +++++++++++++++++++++++++++++++++++------------------
fs/nfsd/state.h | 3 +--
2 files changed, 36 insertions(+), 20 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 08586646e962..a3321601f55f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -700,10 +700,11 @@ static void free_generic_stateid(struct nfs4_ol_stateid *stp)
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);
@@ -718,12 +719,11 @@ static void unhash_lockowner(struct nfs4_lockowner *lo)
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);
}
}
@@ -739,22 +739,36 @@ static void release_lockowner(struct nfs4_lockowner *lo)
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);
}
@@ -2749,7 +2763,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
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;
@@ -4346,7 +4360,6 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s
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);
}
/*
@@ -4391,6 +4404,7 @@ alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct
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;
}
@@ -4978,18 +4992,21 @@ static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
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;
}
@@ -5001,7 +5018,7 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*fun
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)
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 24eec922685c..4c6d6c3f8eae 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -365,7 +365,6 @@ struct nfs4_openowner {
struct nfs4_lockowner {
struct nfs4_stateowner lo_owner; /* must be first element */
struct list_head lo_owner_ino_hash; /* hash by owner,file */
- struct list_head lo_perstateid;
struct list_head lo_list; /* for temporary uses */
};
@@ -434,7 +433,7 @@ struct nfs4_ol_stateid {
struct nfs4_stid st_stid; /* must be first field */
struct list_head st_perfile;
struct list_head st_perstateowner;
- struct list_head st_lockowners;
+ struct list_head st_locks;
struct nfs4_stateowner * st_stateowner;
struct nfs4_file * st_file;
unsigned long st_access_bmap;
--
1.9.3
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