From: Trond Myklebust Date: Mon, 30 Jun 2014 15:48:38 +0000 (-0400) Subject: nfsd: lock owners are not per open stateid X-Git-Tag: v4.13~6863^2~138 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=3c87b9b7c05d7775a3d942de588296025023c6d2;p=mirror_ubuntu-bionic-kernel.git 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 Reviewed-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 1e973f67999d..137fdcce9023 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -695,10 +695,11 @@ 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); @@ -713,12 +714,11 @@ 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); } } @@ -734,22 +734,36 @@ 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); } @@ -2744,7 +2758,7 @@ 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; @@ -4335,7 +4349,6 @@ 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); } /* @@ -4380,6 +4393,7 @@ 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; } @@ -4967,18 +4981,21 @@ 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; } @@ -4990,7 +5007,7 @@ 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 62f33b7ec10c..c1e384a0a40a 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 */ }; @@ -433,7 +432,7 @@ 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;