[Ocfs2-devel] [PATCH 27/32] ocfs2/dlm: Remove struct dlm_lock_name in struct dlm_master_list_entry
Mark Fasheh
mfasheh at suse.com
Tue Mar 17 13:01:17 PDT 2009
From: Sunil Mushran <sunil.mushran at oracle.com>
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: Sunil Mushran <sunil.mushran at oracle.com>
Signed-off-by: Mark Fasheh <mfasheh at suse.com>
---
fs/ocfs2/dlm/dlmcommon.h | 14 +++-------
fs/ocfs2/dlm/dlmdebug.c | 12 +-------
fs/ocfs2/dlm/dlmmaster.c | 68 ++++++++++++---------------------------------
3 files changed, 23 insertions(+), 71 deletions(-)
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 266fde9..0102be3 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -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;
+ struct dlm_lock_resource *mleres;
+ unsigned char mname[DLM_LOCKID_NAME_MAX];
+ unsigned int mnamelen;
+ unsigned int mnamehash;
};
enum dlm_ast_type {
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index bf9fa27..bdf1c78 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -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,
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index d9c5c5a..f8b653f 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -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);
--
1.5.6
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