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>
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2 changed files with 36 additions and 20 deletions
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@ -695,10 +695,11 @@ static void free_generic_stateid(struct nfs4_ol_stateid *stp)
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nfs4_free_stid(stateid_slab, &stp->st_stid);
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}
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static void release_lock_stateid(struct nfs4_ol_stateid *stp)
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static void __release_lock_stateid(struct nfs4_ol_stateid *stp)
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{
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struct file *file;
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list_del(&stp->st_locks);
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unhash_generic_stateid(stp);
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unhash_stid(&stp->st_stid);
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file = find_any_file(stp->st_file);
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@ -713,12 +714,11 @@ static void unhash_lockowner(struct nfs4_lockowner *lo)
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struct nfs4_ol_stateid *stp;
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list_del(&lo->lo_owner.so_strhash);
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list_del(&lo->lo_perstateid);
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list_del(&lo->lo_owner_ino_hash);
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while (!list_empty(&lo->lo_owner.so_stateids)) {
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stp = list_first_entry(&lo->lo_owner.so_stateids,
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struct nfs4_ol_stateid, st_perstateowner);
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release_lock_stateid(stp);
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__release_lock_stateid(stp);
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}
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}
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@ -734,22 +734,36 @@ static void release_lockowner(struct nfs4_lockowner *lo)
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nfs4_free_lockowner(lo);
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}
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static void
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release_stateid_lockowners(struct nfs4_ol_stateid *open_stp)
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static void release_lockowner_if_empty(struct nfs4_lockowner *lo)
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{
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if (list_empty(&lo->lo_owner.so_stateids))
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release_lockowner(lo);
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}
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static void release_lock_stateid(struct nfs4_ol_stateid *stp)
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{
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struct nfs4_lockowner *lo;
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while (!list_empty(&open_stp->st_lockowners)) {
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lo = list_entry(open_stp->st_lockowners.next,
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struct nfs4_lockowner, lo_perstateid);
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release_lockowner(lo);
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lo = lockowner(stp->st_stateowner);
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__release_lock_stateid(stp);
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release_lockowner_if_empty(lo);
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}
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static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp)
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{
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struct nfs4_ol_stateid *stp;
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while (!list_empty(&open_stp->st_locks)) {
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stp = list_entry(open_stp->st_locks.next,
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struct nfs4_ol_stateid, st_locks);
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release_lock_stateid(stp);
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}
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}
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static void unhash_open_stateid(struct nfs4_ol_stateid *stp)
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{
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unhash_generic_stateid(stp);
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release_stateid_lockowners(stp);
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release_open_stateid_locks(stp);
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close_generic_stateid(stp);
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}
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@ -2744,7 +2758,7 @@ static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp,
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struct nfs4_openowner *oo = open->op_openowner;
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stp->st_stid.sc_type = NFS4_OPEN_STID;
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INIT_LIST_HEAD(&stp->st_lockowners);
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INIT_LIST_HEAD(&stp->st_locks);
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list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids);
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list_add(&stp->st_perfile, &fp->fi_stateids);
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stp->st_stateowner = &oo->oo_owner;
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@ -4335,7 +4349,6 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s
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list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]);
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list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]);
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list_add(&lo->lo_perstateid, &open_stp->st_lockowners);
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}
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/*
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@ -4380,6 +4393,7 @@ alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct
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stp->st_access_bmap = 0;
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stp->st_deny_bmap = open_stp->st_deny_bmap;
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stp->st_openstp = open_stp;
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list_add(&stp->st_locks, &open_stp->st_locks);
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return stp;
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}
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@ -4967,18 +4981,21 @@ static void nfsd_print_count(struct nfs4_client *clp, unsigned int count,
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printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type);
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}
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static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *))
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static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
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void (*func)(struct nfs4_ol_stateid *))
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{
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struct nfs4_openowner *oop;
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struct nfs4_lockowner *lop, *lo_next;
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struct nfs4_ol_stateid *stp, *st_next;
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struct nfs4_ol_stateid *lst, *lst_next;
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u64 count = 0;
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list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) {
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list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) {
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list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) {
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list_for_each_entry_safe(stp, st_next,
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&oop->oo_owner.so_stateids, st_perstateowner) {
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list_for_each_entry_safe(lst, lst_next,
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&stp->st_locks, st_locks) {
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if (func)
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func(lop);
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func(lst);
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if (++count == max)
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return count;
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}
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@ -4990,7 +5007,7 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*fun
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u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max)
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{
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return nfsd_foreach_client_lock(clp, max, release_lockowner);
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return nfsd_foreach_client_lock(clp, max, release_lock_stateid);
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}
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u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max)
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@ -365,7 +365,6 @@ struct nfs4_openowner {
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struct nfs4_lockowner {
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struct nfs4_stateowner lo_owner; /* must be first element */
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struct list_head lo_owner_ino_hash; /* hash by owner,file */
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struct list_head lo_perstateid;
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struct list_head lo_list; /* for temporary uses */
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};
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@ -433,7 +432,7 @@ struct nfs4_ol_stateid {
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struct nfs4_stid st_stid; /* must be first field */
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struct list_head st_perfile;
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struct list_head st_perstateowner;
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struct list_head st_lockowners;
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struct list_head st_locks;
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struct nfs4_stateowner * st_stateowner;
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struct nfs4_file * st_file;
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unsigned long st_access_bmap;
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