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Commit 7141514b authored by Sunil Mushran's avatar Sunil Mushran Committed by Mark Fasheh
Browse files

ocfs2/dlm: Remove struct dlm_lock_name in struct dlm_master_list_entry 



This patch removes struct dlm_lock_name and adds the entries directly
to struct dlm_master_list_entry. Under the new scheme, both mles that
are backed by a lockres or not, will have the name populated in mle->mname.
This allows us to get rid of code that was figuring out the location of
the mle name.

Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent e64ff146

fs/ocfs2/dlm/dlmcommon.h

+4 −10
Original line number Diff line number Diff line
@@ -56,12 +56,6 @@ enum dlm_mle_type { 
	DLM_MLE_NUM_TYPES

};



struct dlm_lock_name {

	unsigned int hash;

	unsigned int len;

	unsigned char name[DLM_LOCKID_NAME_MAX];

};



struct dlm_master_list_entry {

	struct hlist_node master_hash_node;

	struct list_head hb_events;
@@ -80,10 +74,10 @@ struct dlm_master_list_entry { 
	enum dlm_mle_type type;

	struct o2hb_callback_func mle_hb_up;

	struct o2hb_callback_func mle_hb_down;

	union {

	struct dlm_lock_resource *mleres;

		struct dlm_lock_name mlename;

	} u;

	unsigned char mname[DLM_LOCKID_NAME_MAX];

	unsigned int mnamelen;

	unsigned int mnamehash;

};



enum dlm_ast_type {

fs/ocfs2/dlm/dlmdebug.c

+1 −11
Original line number Diff line number Diff line
@@ -287,18 +287,8 @@ static int stringify_nodemap(unsigned long *nodemap, int maxnodes, 
static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)

{

	int out = 0;

	unsigned int namelen;

	unsigned char *name;

	char *mle_type;



	if (mle->type != DLM_MLE_MASTER) {

		name = mle->u.mlename.name;

		namelen = mle->u.mlename.len;

	} else {

		name  = (unsigned char *)mle->u.mleres->lockname.name;

		namelen = mle->u.mleres->lockname.len;

	}



	if (mle->type == DLM_MLE_BLOCK)

		mle_type = "BLK";

	else if (mle->type == DLM_MLE_MASTER)
@@ -306,7 +296,7 @@ static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) 
	else

		mle_type = "MIG";



	out += stringify_lockname(name, namelen, buf + out, len - out);

	out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out);

	out += snprintf(buf + out, len - out,

			"\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",

			mle_type, mle->master, mle->new_master,

fs/ocfs2/dlm/dlmmaster.c

+18 −50
Original line number Diff line number Diff line
@@ -68,41 +68,16 @@ static int dlm_do_assert_master(struct dlm_ctxt *dlm, 
				void *nodemap, u32 flags);

static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data);



static inline void __dlm_mle_name(struct dlm_master_list_entry *mle,

				  unsigned char **name, unsigned int *namelen,

				  unsigned int *namehash)

{

	BUG_ON(mle->type != DLM_MLE_BLOCK &&

	       mle->type != DLM_MLE_MASTER &&

	       mle->type != DLM_MLE_MIGRATION);



	if (mle->type != DLM_MLE_MASTER) {

		*name = mle->u.mlename.name;

		*namelen = mle->u.mlename.len;

		if (namehash)

			*namehash = mle->u.mlename.hash;

	} else {

		*name  = (unsigned char *)mle->u.mleres->lockname.name;

		*namelen = mle->u.mleres->lockname.len;

		if (namehash)

			*namehash = mle->u.mleres->lockname.hash;

	}

}



static inline int dlm_mle_equal(struct dlm_ctxt *dlm,

				struct dlm_master_list_entry *mle,

				const char *name,

				unsigned int namelen)

{

	unsigned char *mlename;

	unsigned int mlelen;



	if (dlm != mle->dlm)

		return 0;



	__dlm_mle_name(mle, &mlename, &mlelen, NULL);



	if (namelen != mlelen || memcmp(name, mlename, namelen) != 0)

	if (namelen != mle->mnamelen ||

	    memcmp(name, mle->mname, namelen) != 0)

		return 0;



	return 1;
@@ -317,12 +292,16 @@ static void dlm_init_mle(struct dlm_master_list_entry *mle, 


	if (mle->type == DLM_MLE_MASTER) {

		BUG_ON(!res);

		mle->u.mleres = res;

		mle->mleres = res;

		memcpy(mle->mname, res->lockname.name, res->lockname.len);

		mle->mnamelen = res->lockname.len;

		mle->mnamehash = res->lockname.hash;

	} else {

		BUG_ON(!name);

		memcpy(mle->u.mlename.name, name, namelen);

		mle->u.mlename.len = namelen;

		mle->u.mlename.hash = dlm_lockid_hash(name, namelen);

		mle->mleres = NULL;

		memcpy(mle->mname, name, namelen);

		mle->mnamelen = namelen;

		mle->mnamehash = dlm_lockid_hash(name, namelen);

	}



	atomic_inc(&dlm->mle_tot_count[mle->type]);
@@ -350,13 +329,10 @@ void __dlm_unlink_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle) 
void __dlm_insert_mle(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle)

{

	struct hlist_head *bucket;

	unsigned char *mname;

	unsigned int mlen, hash;



	assert_spin_locked(&dlm->master_lock);



	__dlm_mle_name(mle, &mname, &mlen, &hash);

	bucket = dlm_master_hash(dlm, hash);

	bucket = dlm_master_hash(dlm, mle->mnamehash);

	hlist_add_head(&mle->master_hash_node, bucket);

}
@@ -450,8 +426,6 @@ static void dlm_mle_release(struct kref *kref) 
{

	struct dlm_master_list_entry *mle;

	struct dlm_ctxt *dlm;

	unsigned char *mname;

	unsigned int mlen;



	mlog_entry_void();
@@ -461,8 +435,8 @@ static void dlm_mle_release(struct kref *kref) 
	assert_spin_locked(&dlm->spinlock);

	assert_spin_locked(&dlm->master_lock);



	__dlm_mle_name(mle, &mname, &mlen, NULL);

	mlog(0, "Releasing mle for %.*s, type %d\n", mlen, mname, mle->type);

	mlog(0, "Releasing mle for %.*s, type %d\n", mle->mnamelen, mle->mname,

	     mle->type);



	/* remove from list if not already */

	__dlm_unlink_mle(dlm, mle);
@@ -1284,7 +1258,7 @@ static int dlm_restart_lock_mastery(struct dlm_ctxt *dlm, 
						     res->lockname.len,

						     res->lockname.name);

						mle->type = DLM_MLE_MASTER;

						mle->u.mleres = res;

						mle->mleres = res;

					}

				}

			}
@@ -1323,18 +1297,14 @@ static int dlm_do_master_request(struct dlm_lock_resource *res, 
	struct dlm_ctxt *dlm = mle->dlm;

	struct dlm_master_request request;

	int ret, response=0, resend;

	unsigned char *mlename;

	unsigned int mlenamelen;



	memset(&request, 0, sizeof(request));

	request.node_idx = dlm->node_num;



	BUG_ON(mle->type == DLM_MLE_MIGRATION);



	__dlm_mle_name(mle, &mlename, &mlenamelen, NULL);



	request.namelen = (u8)mlenamelen;

	memcpy(request.name, mlename, request.namelen);

	request.namelen = (u8)mle->mnamelen;

	memcpy(request.name, mle->mname, request.namelen);



again:

	ret = o2net_send_message(DLM_MASTER_REQUEST_MSG, dlm->key, &request,
@@ -3203,12 +3173,10 @@ static struct dlm_lock_resource *dlm_reset_mleres_owner(struct dlm_ctxt *dlm, 
					struct dlm_master_list_entry *mle)

{

	struct dlm_lock_resource *res;

	unsigned int hash;



	/* Find the lockres associated to the mle and set its owner to UNK */

	hash = dlm_lockid_hash(mle->u.mlename.name, mle->u.mlename.len);

	res = __dlm_lookup_lockres(dlm, mle->u.mlename.name, mle->u.mlename.len,

				   hash);

	res = __dlm_lookup_lockres(dlm, mle->mname, mle->mnamelen,

				   mle->mnamehash);

	if (res) {

		spin_unlock(&dlm->master_lock);