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ocfs2: Handle the DLM_CANCELGRANT case in user_unlock_ast()

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Remove the code which attempted to catch it via dlmunlock() return status -
this never happens there.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh 2006-03-29 18:24:12 -08:00
parent cc6eb72595
commit f43e6918c0
1 changed files with 22 additions and 12 deletions
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34
fs/ocfs2/dlm/userdlm.c
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@ -233,23 +233,38 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
mlog(0, "UNLOCK AST called on lock %s\n", lockres->l_name);
if (status != DLM_NORMAL)
if (status != DLM_NORMAL && status != DLM_CANCELGRANT)
mlog(ML_ERROR, "Dlm returns status %d\n", status);
spin_lock(&lockres->l_lock);
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN)
lockres->l_level = LKM_IVMODE;
else {
else if (status == DLM_CANCELGRANT) {
mlog(0, "Lock %s, cancel fails, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
/* We tried to cancel a convert request, but it was
* already granted. Don't clear the busy flag - the
* ast should've done this already. */
BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
goto out_noclear;
} else {
BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
/* Cancel succeeded, we want to re-queue */
mlog(0, "Lock %s, cancel succeeds, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
lockres->l_requested = LKM_IVMODE; /* cancel an
* upconvert
* request. */
lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
/* we want the unblock thread to look at it again
* now. */
__user_dlm_queue_lockres(lockres);
if (lockres->l_flags & USER_LOCK_BLOCKED)
__user_dlm_queue_lockres(lockres);
}
lockres->l_flags &= ~USER_LOCK_BUSY;
out_noclear:
spin_unlock(&lockres->l_lock);
wake_up(&lockres->l_event);
@ -299,7 +314,9 @@ static void user_dlm_unblock_lock(void *opaque)
}
if (lockres->l_flags & USER_LOCK_BUSY) {
mlog(0, "BUSY flag detected...\n");
mlog(0, "Cancel lock %s, flags 0x%x\n",
lockres->l_name, lockres->l_flags);
if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
spin_unlock(&lockres->l_lock);
goto drop_ref;
@ -313,14 +330,7 @@ static void user_dlm_unblock_lock(void *opaque)
LKM_CANCEL,
user_unlock_ast,
lockres);
if (status == DLM_CANCELGRANT) {
/* If we got this, then the ast was fired
* before we could cancel. We cleanup our
* state, and restart the function. */
spin_lock(&lockres->l_lock);
lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
spin_unlock(&lockres->l_lock);
} else if (status != DLM_NORMAL)
if (status != DLM_NORMAL)
user_log_dlm_error("dlmunlock", status, lockres);
goto drop_ref;
}