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ocfs2_dlm: Calling post handler function in assert master handler

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This patch prevents the dlm from sending the clear refmap message
before the set refmap. We use the newly created post function handler
routine to accomplish the task.

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Kurt Hackel 2007-01-17 17:05:53 -08:00 committed by Mark Fasheh
parent d74c9803a9
commit 3b8118cffa
4 changed files with 29 additions and 4 deletions
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2
fs/ocfs2/dlm/dlmcommon.h
View file

@ -224,6 +224,7 @@ static inline void __dlm_set_joining_node(struct dlm_ctxt *dlm,
#define DLM_LOCK_RES_MIGRATING 0x00000020
#define DLM_LOCK_RES_DROPPING_REF 0x00000040
#define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000
#define DLM_LOCK_RES_SETREF_INPROG 0x00002000
/* max milliseconds to wait to sync up a network failure with a node death */
#define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
@ -879,6 +880,7 @@ int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data);
int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data);
void dlm_assert_master_post_handler(int status, void *data, void *ret_data);
int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
void **ret_data);
int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data,

3
fs/ocfs2/dlm/dlmdomain.c
View file

@ -1101,7 +1101,8 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm)
status = o2net_register_handler(DLM_ASSERT_MASTER_MSG, dlm->key,
sizeof(struct dlm_assert_master),
dlm_assert_master_handler,
dlm, NULL, &dlm->dlm_domain_handlers);
dlm, dlm_assert_master_post_handler,
&dlm->dlm_domain_handlers);
if (status)
goto bail;

24
fs/ocfs2/dlm/dlmmaster.c
View file

@ -2036,8 +2036,12 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
done:
ret = 0;
if (res)
dlm_lockres_put(res);
if (res) {
spin_lock(&res->spinlock);
res->state |= DLM_LOCK_RES_SETREF_INPROG;
spin_unlock(&res->spinlock);
*ret_data = (void *)res;
}
dlm_put(dlm);
if (master_request) {
mlog(0, "need to tell master to reassert\n");
@ -2064,11 +2068,25 @@ int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
__dlm_print_one_lock_resource(res);
spin_unlock(&res->spinlock);
spin_unlock(&dlm->spinlock);
dlm_lockres_put(res);
*ret_data = (void *)res;
dlm_put(dlm);
return -EINVAL;
}
void dlm_assert_master_post_handler(int status, void *data, void *ret_data)
{
struct dlm_lock_resource *res = (struct dlm_lock_resource *)ret_data;
if (ret_data) {
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_SETREF_INPROG;
spin_unlock(&res->spinlock);
wake_up(&res->wq);
dlm_lockres_put(res);
}
return;
}
int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res,
int ignore_higher, u8 request_from, u32 flags)

4
fs/ocfs2/dlm/dlmthread.c
View file

@ -176,6 +176,10 @@ static int dlm_purge_lockres(struct dlm_ctxt *dlm,
res->lockname.name, master);
if (!master) {
spin_lock(&res->spinlock);
/* This ensures that clear refmap is sent after the set */
__dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG);
spin_unlock(&res->spinlock);
/* drop spinlock to do messaging, retake below */
spin_unlock(&dlm->spinlock);
/* clear our bit from the master's refmap, ignore errors */