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Commit 16bfdaaf authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

nfsd4: share open and lock owner hash tables 



Now that they're used in the same way, it's a little simpler to put open
and lock owners in the same hash table, and I can't see a reason not to.

Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 06f1f864

fs/nfsd/nfs4state.c

+32 −39
Original line number Diff line number Diff line
@@ -133,21 +133,21 @@ unsigned int max_delegations; 
 * Open owner state (share locks)

 */



/* hash tables for open owners */

#define OPEN_OWNER_HASH_BITS              8

#define OPEN_OWNER_HASH_SIZE             (1 << OPEN_OWNER_HASH_BITS)

#define OPEN_OWNER_HASH_MASK             (OPEN_OWNER_HASH_SIZE - 1)

/* hash tables for lock and open owners */

#define OWNER_HASH_BITS              8

#define OWNER_HASH_SIZE             (1 << OWNER_HASH_BITS)

#define OWNER_HASH_MASK             (OWNER_HASH_SIZE - 1)



static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)

static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername)

{

	unsigned int ret;



	ret = opaque_hashval(ownername->data, ownername->len);

	ret += clientid;

	return ret & OPEN_OWNER_HASH_MASK;

	return ret & OWNER_HASH_MASK;

}



static struct list_head	open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE];

static struct list_head	ownerstr_hashtbl[OWNER_HASH_SIZE];



/* hash table for nfs4_file */

#define FILE_HASH_BITS                   8
@@ -2373,7 +2373,7 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj 


static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval)

{

	list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]);

	list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);

	list_add(&oo->oo_perclient, &clp->cl_openowners);

}
@@ -2436,7 +2436,9 @@ find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 
	struct nfs4_stateowner *so;

	struct nfs4_openowner *oo;



	list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) {

	list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) {

		if (!so->so_is_open_owner)

			continue;

		if (same_owner_str(so, &open->op_owner, &open->op_clientid)) {

			oo = openowner(so);

			renew_client(oo->oo_owner.so_client);
@@ -2580,7 +2582,7 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate, 
	if (open->op_file == NULL)

		return nfserr_jukebox;



	strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner);

	strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner);

	oo = find_openstateowner_str(strhashval, open);

	open->op_openowner = oo;

	if (!oo) {
@@ -3718,13 +3720,7 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 
}





/* 

 * Lock owner state (byte-range locks)

 */

#define LOFF_OVERFLOW(start, len)      ((u64)(len) > ~(u64)(start))

#define LOCK_HASH_BITS              8

#define LOCK_HASH_SIZE             (1 << LOCK_HASH_BITS)

#define LOCK_HASH_MASK             (LOCK_HASH_SIZE - 1)



static inline u64

end_offset(u64 start, u64 len)
@@ -3746,8 +3742,6 @@ last_byte_offset(u64 start, u64 len) 
	return end > start ? end - 1: NFS4_MAX_UINT64;

}



static struct list_head	lock_ownerstr_hashtbl[LOCK_HASH_SIZE];



/*

 * 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
@@ -3815,11 +3809,13 @@ static struct nfs4_lockowner * 
find_lockowner_str(struct inode *inode, clientid_t *clid,

		struct xdr_netobj *owner)

{

	unsigned int hashval = open_ownerstr_hashval(clid->cl_id, owner);

	unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);

	struct nfs4_lockowner *lo;

	struct nfs4_stateowner *op;



	list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {

	list_for_each_entry(op, &ownerstr_hashtbl[hashval], so_strhash) {

		if (op->so_is_open_owner)

			continue;

		lo = lockowner(op);

		if (same_lockowner_ino(lo, inode, clid, owner))

			return lo;
@@ -3829,7 +3825,7 @@ find_lockowner_str(struct inode *inode, clientid_t *clid, 


static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp)

{

	list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]);

	list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]);

	list_add(&lo->lo_perstateid, &open_stp->st_lockowners);

}
@@ -3838,7 +3834,7 @@ static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, s 
 * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 

 * occurred. 

 *

 * strhashval = open_ownerstr_hashval

 * strhashval = ownerstr_hashval

 */



static struct nfs4_lockowner *
@@ -3913,7 +3909,7 @@ __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct n 
				struct nfs4_ol_stateid, st_perstateowner);

		return nfs_ok;

	}

	strhashval = open_ownerstr_hashval(cl->cl_clientid.cl_id,

	strhashval = ownerstr_hashval(cl->cl_clientid.cl_id,

			&lock->v.new.owner);

	lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock);

	if (lo == NULL)
@@ -4277,7 +4273,7 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, 
	struct nfs4_ol_stateid *stp;

	struct xdr_netobj *owner = &rlockowner->rl_owner;

	struct list_head matches;

	unsigned int hashval = open_ownerstr_hashval(clid->cl_id, owner);

	unsigned int hashval = ownerstr_hashval(clid->cl_id, owner);

	__be32 status;



	dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
@@ -4294,7 +4290,9 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp, 
	status = nfserr_locks_held;

	INIT_LIST_HEAD(&matches);



	list_for_each_entry(sop, &lock_ownerstr_hashtbl[hashval], so_strhash) {

	list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) {

		if (sop->so_is_open_owner)

			continue;

		if (!same_owner_str(sop, owner, clid))

			continue;

		list_for_each_entry(stp, &sop->so_stateids,
@@ -4444,16 +4442,16 @@ static void release_openowner_sop(struct nfs4_stateowner *sop) 
	release_openowner(openowner(sop));

}



static int nfsd_release_n_owners(u64 num,

				struct list_head hashtbl[],

				unsigned int hashtbl_size,

static int nfsd_release_n_owners(u64 num, bool is_open_owner

				void (*release_sop)(struct nfs4_stateowner *))

{

	int i, count = 0;

	struct nfs4_stateowner *sop, *next;



	for (i = 0; i < hashtbl_size; i++) {

		list_for_each_entry_safe(sop, next, &hashtbl[i], so_strhash) {

	for (i = 0; i < OWNER_HASH_SIZE; i++) {

		list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) {

			if (sop->so_is_open_owner != is_open_owner)

				continue;

			release_sop(sop);

			if (++count == num)

				return count;
@@ -4467,8 +4465,7 @@ void nfsd_forget_locks(u64 num) 
	int count;



	nfs4_lock_state();

	count = nfsd_release_n_owners(num, lock_ownerstr_hashtbl,

				     LOCK_HASH_SIZE, release_lockowner_sop);

	count = nfsd_release_n_owners(num, false, release_lockowner_sop);

	nfs4_unlock_state();



	printk(KERN_INFO "NFSD: Forgot %d locks", count);
@@ -4479,8 +4476,7 @@ void nfsd_forget_openowners(u64 num) 
	int count;



	nfs4_lock_state();

	count = nfsd_release_n_owners(num, open_ownerstr_hashtbl,

				     OPEN_OWNER_HASH_SIZE, release_openowner_sop);

	count = nfsd_release_n_owners(num, true, release_openowner_sop);

	nfs4_unlock_state();



	printk(KERN_INFO "NFSD: Forgot %d open owners", count);
@@ -4549,11 +4545,8 @@ nfs4_state_init(void) 
	for (i = 0; i < FILE_HASH_SIZE; i++) {

		INIT_LIST_HEAD(&file_hashtbl[i]);

	}

	for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) {

		INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]);

	}

	for (i = 0; i < LOCK_HASH_SIZE; i++) {

		INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]);

	for (i = 0; i < OWNER_HASH_SIZE; i++) {

		INIT_LIST_HEAD(&ownerstr_hashtbl[i]);

	}

	memset(&onestateid, ~0, sizeof(stateid_t));

	INIT_LIST_HEAD(&close_lru);