From b3c32bcd9c4b8320aea504477573f0c460d2d57d Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 30 Jun 2014 11:48:40 -0400 Subject: [PATCH] nfsd: NFSv4 lock-owners are not associated to a specific file Just like open-owners, lock-owners are associated with a name, a clientid and, in the case of minor version 0, a sequence id. There is no association to a file. Signed-off-by: Trond Myklebust Reviewed-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- fs/nfsd/netns.h | 4 --- fs/nfsd/nfs4state.c | 73 ++++++++++------------------------------------------- fs/nfsd/state.h | 1 - 3 files changed, 14 insertions(+), 64 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index 113e1aa..a71d144 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -29,9 +29,6 @@ #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) -#define LOCKOWNER_INO_HASH_BITS 8 -#define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) - #define SESSION_HASH_SIZE 512 struct cld_net; @@ -67,7 +64,6 @@ struct nfsd_net { struct list_head *unconf_id_hashtbl; struct rb_root unconf_name_tree; struct list_head *ownerstr_hashtbl; - struct list_head *lockowner_ino_hashtbl; struct list_head *sessionid_hashtbl; /* * client_lru holds client queue ordered by nfs4_client.cl_time diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 9b6a4f3..ff10919 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -714,7 +714,6 @@ static void unhash_lockowner(struct nfs4_lockowner *lo) struct nfs4_ol_stateid *stp; list_del(&lo->lo_owner.so_strhash); - 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); @@ -4225,8 +4224,6 @@ out: #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) -#define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) - static inline u64 end_offset(u64 start, u64 len) { @@ -4247,13 +4244,6 @@ last_byte_offset(u64 start, u64 len) return end > start ? end - 1: NFS4_MAX_UINT64; } -static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) -{ - return (file_hashval(inode) + cl_id - + opaque_hashval(ownername->data, ownername->len)) - & LOCKOWNER_INO_HASH_MASK; -} - /* * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that * we can't properly handle lock requests that go beyond the (2^63 - 1)-th @@ -4306,46 +4296,23 @@ nevermind: deny->ld_type = NFS4_WRITE_LT; } -static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) -{ - struct nfs4_ol_stateid *lst; - - if (!same_owner_str(&lo->lo_owner, owner, clid)) - return false; - if (list_empty(&lo->lo_owner.so_stateids)) { - WARN_ON_ONCE(1); - return false; - } - lst = list_first_entry(&lo->lo_owner.so_stateids, - struct nfs4_ol_stateid, st_perstateowner); - return lst->st_file->fi_inode == inode; -} - static struct nfs4_lockowner * -find_lockowner_str(struct inode *inode, clientid_t *clid, - struct xdr_netobj *owner, struct nfsd_net *nn) +find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, + struct nfsd_net *nn) { - unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); - struct nfs4_lockowner *lo; + unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); + struct nfs4_stateowner *so; - list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { - if (same_lockowner_ino(lo, inode, clid, owner)) - return lo; + list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { + if (so->so_is_open_owner) + continue; + if (!same_owner_str(so, owner, clid)) + continue; + return lockowner(so); } return NULL; } -static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) -{ - struct inode *inode = open_stp->st_file->fi_inode; - unsigned int inohash = lockowner_ino_hashval(inode, - clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); - struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - - list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); - list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); -} - /* * Alloc a lock owner structure. * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has @@ -4353,10 +4320,10 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s * * strhashval = ownerstr_hashval */ - static struct nfs4_lockowner * alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { struct nfs4_lockowner *lo; + struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); if (!lo) @@ -4366,7 +4333,7 @@ alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, str /* It is the openowner seqid that will be incremented in encode in the * case of new lockowners; so increment the lock seqid manually: */ lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; - hash_lockowner(lo, strhashval, clp, open_stp); + list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); return lo; } @@ -4432,8 +4399,7 @@ static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, s unsigned int strhashval; struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); - lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, - &lock->v.new.owner, nn); + lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); if (!lo) { strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, &lock->v.new.owner); @@ -4647,7 +4613,6 @@ __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_lockt *lockt) { - struct inode *inode; struct file_lock *file_lock = NULL; struct nfs4_lockowner *lo; __be32 status; @@ -4670,7 +4635,6 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) goto out; - inode = cstate->current_fh.fh_dentry->d_inode; file_lock = locks_alloc_lock(); if (!file_lock) { dprintk("NFSD: %s: unable to allocate lock!\n", __func__); @@ -4693,7 +4657,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, goto out; } - lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); + lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); if (lo) file_lock->fl_owner = (fl_owner_t)lo; file_lock->fl_pid = current->tgid; @@ -5187,10 +5151,6 @@ static int nfs4_state_create_net(struct net *net) OWNER_HASH_SIZE, GFP_KERNEL); if (!nn->ownerstr_hashtbl) goto err_ownerstr; - nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * - LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); - if (!nn->lockowner_ino_hashtbl) - goto err_lockowner_ino; nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * SESSION_HASH_SIZE, GFP_KERNEL); if (!nn->sessionid_hashtbl) @@ -5202,8 +5162,6 @@ static int nfs4_state_create_net(struct net *net) } for (i = 0; i < OWNER_HASH_SIZE; i++) INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); - for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) - INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); for (i = 0; i < SESSION_HASH_SIZE; i++) INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); nn->conf_name_tree = RB_ROOT; @@ -5219,8 +5177,6 @@ static int nfs4_state_create_net(struct net *net) return 0; err_sessionid: - kfree(nn->lockowner_ino_hashtbl); -err_lockowner_ino: kfree(nn->ownerstr_hashtbl); err_ownerstr: kfree(nn->unconf_id_hashtbl); @@ -5252,7 +5208,6 @@ nfs4_state_destroy_net(struct net *net) } kfree(nn->sessionid_hashtbl); - kfree(nn->lockowner_ino_hashtbl); kfree(nn->ownerstr_hashtbl); kfree(nn->unconf_id_hashtbl); kfree(nn->conf_id_hashtbl); diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index c1e384a..23b11093 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -364,7 +364,6 @@ 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_list; /* for temporary uses */ }; -- 2.7.4