aboutsummaryrefslogtreecommitdiff
path: root/fs/dlm
diff options
context:
space:
mode:
Diffstat (limited to 'fs/dlm')
-rw-r--r--fs/dlm/ast.c74
-rw-r--r--fs/dlm/ast.h4
-rw-r--r--fs/dlm/dlm_internal.h10
-rw-r--r--fs/dlm/lock.c4
-rw-r--r--fs/dlm/user.c10
-rw-r--r--fs/dlm/user.h4
6 files changed, 78 insertions, 28 deletions
diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index dc2ad6008b2..4314f0d48d8 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -33,10 +33,10 @@ void dlm_del_ast(struct dlm_lkb *lkb)
spin_unlock(&ast_queue_lock);
}
-void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
+void dlm_add_ast(struct dlm_lkb *lkb, int type, int mode)
{
if (lkb->lkb_flags & DLM_IFL_USER) {
- dlm_user_add_ast(lkb, type, bastmode);
+ dlm_user_add_ast(lkb, type, mode);
return;
}
@@ -44,10 +44,21 @@ void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
if (!(lkb->lkb_ast_type & (AST_COMP | AST_BAST))) {
kref_get(&lkb->lkb_ref);
list_add_tail(&lkb->lkb_astqueue, &ast_queue);
+ lkb->lkb_ast_first = type;
}
+
+ /* sanity check, this should not happen */
+
+ if ((type == AST_COMP) && (lkb->lkb_ast_type & AST_COMP))
+ log_print("repeat cast %d castmode %d lock %x %s",
+ mode, lkb->lkb_castmode,
+ lkb->lkb_id, lkb->lkb_resource->res_name);
+
lkb->lkb_ast_type |= type;
- if (bastmode)
- lkb->lkb_bastmode = bastmode;
+ if (type == AST_BAST)
+ lkb->lkb_bastmode = mode;
+ else
+ lkb->lkb_castmode = mode;
spin_unlock(&ast_queue_lock);
set_bit(WAKE_ASTS, &astd_wakeflags);
@@ -59,9 +70,9 @@ static void process_asts(void)
struct dlm_ls *ls = NULL;
struct dlm_rsb *r = NULL;
struct dlm_lkb *lkb;
- void (*cast) (void *astparam);
- void (*bast) (void *astparam, int mode);
- int type = 0, bastmode;
+ void (*castfn) (void *astparam);
+ void (*bastfn) (void *astparam, int mode);
+ int type, first, bastmode, castmode, do_bast, do_cast, last_castmode;
repeat:
spin_lock(&ast_queue_lock);
@@ -75,17 +86,48 @@ repeat:
list_del(&lkb->lkb_astqueue);
type = lkb->lkb_ast_type;
lkb->lkb_ast_type = 0;
+ first = lkb->lkb_ast_first;
+ lkb->lkb_ast_first = 0;
bastmode = lkb->lkb_bastmode;
-
+ castmode = lkb->lkb_castmode;
+ castfn = lkb->lkb_astfn;
+ bastfn = lkb->lkb_bastfn;
spin_unlock(&ast_queue_lock);
- cast = lkb->lkb_astfn;
- bast = lkb->lkb_bastfn;
-
- if ((type & AST_COMP) && cast)
- cast(lkb->lkb_astparam);
- if ((type & AST_BAST) && bast)
- bast(lkb->lkb_astparam, bastmode);
+ do_cast = (type & AST_COMP) && castfn;
+ do_bast = (type & AST_BAST) && bastfn;
+
+ /* Skip a bast if its blocking mode is compatible with the
+ granted mode of the preceding cast. */
+
+ if (do_bast) {
+ if (first == AST_COMP)
+ last_castmode = castmode;
+ else
+ last_castmode = lkb->lkb_castmode_done;
+ if (dlm_modes_compat(bastmode, last_castmode))
+ do_bast = 0;
+ }
+
+ if (first == AST_COMP) {
+ if (do_cast)
+ castfn(lkb->lkb_astparam);
+ if (do_bast)
+ bastfn(lkb->lkb_astparam, bastmode);
+ } else if (first == AST_BAST) {
+ if (do_bast)
+ bastfn(lkb->lkb_astparam, bastmode);
+ if (do_cast)
+ castfn(lkb->lkb_astparam);
+ } else {
+ log_error(ls, "bad ast_first %d ast_type %d",
+ first, type);
+ }
+
+ if (do_cast)
+ lkb->lkb_castmode_done = castmode;
+ if (do_bast)
+ lkb->lkb_bastmode_done = bastmode;
/* this removes the reference added by dlm_add_ast
and may result in the lkb being freed */
diff --git a/fs/dlm/ast.h b/fs/dlm/ast.h
index 1b5fc5f428f..bcb1aaba519 100644
--- a/fs/dlm/ast.h
+++ b/fs/dlm/ast.h
@@ -1,7 +1,7 @@
/******************************************************************************
*******************************************************************************
**
-** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2005-2010 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -13,7 +13,7 @@
#ifndef __ASTD_DOT_H__
#define __ASTD_DOT_H__
-void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
+void dlm_add_ast(struct dlm_lkb *lkb, int type, int mode);
void dlm_del_ast(struct dlm_lkb *lkb);
void dlm_astd_wake(void);
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 826d3dc6e0a..f632b58cd22 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -232,11 +232,17 @@ struct dlm_lkb {
int8_t lkb_status; /* granted, waiting, convert */
int8_t lkb_rqmode; /* requested lock mode */
int8_t lkb_grmode; /* granted lock mode */
- int8_t lkb_bastmode; /* requested mode */
int8_t lkb_highbast; /* highest mode bast sent for */
+
int8_t lkb_wait_type; /* type of reply waiting for */
int8_t lkb_wait_count;
int8_t lkb_ast_type; /* type of ast queued for */
+ int8_t lkb_ast_first; /* type of first ast queued */
+
+ int8_t lkb_bastmode; /* req mode of queued bast */
+ int8_t lkb_castmode; /* gr mode of queued cast */
+ int8_t lkb_bastmode_done; /* last delivered bastmode */
+ int8_t lkb_castmode_done; /* last delivered castmode */
struct list_head lkb_idtbl_list; /* lockspace lkbtbl */
struct list_head lkb_statequeue; /* rsb g/c/w list */
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 9c0c1db1e10..e08ea93432b 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1,7 +1,7 @@
/******************************************************************************
*******************************************************************************
**
-** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2005-2010 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -307,7 +307,7 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
lkb->lkb_lksb->sb_status = rv;
lkb->lkb_lksb->sb_flags = lkb->lkb_sbflags;
- dlm_add_ast(lkb, AST_COMP, 0);
+ dlm_add_ast(lkb, AST_COMP, lkb->lkb_grmode);
}
static inline void queue_cast_overlap(struct dlm_rsb *r, struct dlm_lkb *lkb)
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index e73a4bb572a..a4bfd31ac45 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2006-2009 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2006-2010 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
@@ -173,7 +173,7 @@ static int lkb_is_endoflife(struct dlm_lkb *lkb, int sb_status, int type)
/* we could possibly check if the cancel of an orphan has resulted in the lkb
being removed and then remove that lkb from the orphans list and free it */
-void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
+void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int mode)
{
struct dlm_ls *ls;
struct dlm_user_args *ua;
@@ -206,8 +206,10 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
ast_type = lkb->lkb_ast_type;
lkb->lkb_ast_type |= type;
- if (bastmode)
- lkb->lkb_bastmode = bastmode;
+ if (type == AST_BAST)
+ lkb->lkb_bastmode = mode;
+ else
+ lkb->lkb_castmode = mode;
if (!ast_type) {
kref_get(&lkb->lkb_ref);
diff --git a/fs/dlm/user.h b/fs/dlm/user.h
index 1c968649228..f196091dd7f 100644
--- a/fs/dlm/user.h
+++ b/fs/dlm/user.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2006-2008 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2006-2010 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
@@ -9,7 +9,7 @@
#ifndef __USER_DOT_H__
#define __USER_DOT_H__
-void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
+void dlm_user_add_ast(struct dlm_lkb *lkb, int type, int mode);
int dlm_user_init(void);
void dlm_user_exit(void);
int dlm_device_deregister(struct dlm_ls *ls);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-15 00:47:03 +0000