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authorKurt Hackel <kurt.hackel@oracle.com>2006-04-27 18:02:10 -0700
committerMark Fasheh <mark.fasheh@oracle.com>2006-06-26 14:42:46 -0700
commit8bc674cb4834fb25206b7f7f5e37fe571aa76b34 (patch)
tree9c9ba3801669e66a30bac121846153879a19dfd6 /fs/ocfs2
parentaba9aac78817d88aa2b223f1aedf1e9815ae97b8 (diff)
downloadlinux-8bc674cb4834fb25206b7f7f5e37fe571aa76b34.tar.bz2
ocfs2: Fix empty lvb check
The check for an empty lvb should check the entire buffer not just the first byte. Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/dlm/dlmcommon.h9
-rw-r--r--fs/ocfs2/dlm/dlmrecovery.c12
2 files changed, 16 insertions, 5 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 4fc1be3a3fa2..bf873919b009 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -315,6 +315,15 @@ enum dlm_lockres_list {
DLM_BLOCKED_LIST
};
+static inline int dlm_lvb_is_empty(char *lvb)
+{
+ int i;
+ for (i=0; i<DLM_LVB_LEN; i++)
+ if (lvb[i])
+ return 0;
+ return 1;
+}
+
static inline struct list_head *
dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
{
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index b568bb6617d8..8a3f0173ff56 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1021,8 +1021,9 @@ static int dlm_add_lock_to_array(struct dlm_lock *lock,
ml->type == LKM_PRMODE) {
/* if it is already set, this had better be a PR
* and it has to match */
- if (mres->lvb[0] && (ml->type == LKM_EXMODE ||
- memcmp(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN))) {
+ if (!dlm_lvb_is_empty(mres->lvb) &&
+ (ml->type == LKM_EXMODE ||
+ memcmp(mres->lvb, lock->lksb->lvb, DLM_LVB_LEN))) {
mlog(ML_ERROR, "mismatched lvbs!\n");
__dlm_print_one_lock_resource(lock->lockres);
BUG();
@@ -1554,7 +1555,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
lksb->flags |= (ml->flags &
(DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB));
- if (mres->lvb[0]) {
+ if (!dlm_lvb_is_empty(mres->lvb)) {
if (lksb->flags & DLM_LKSB_PUT_LVB) {
/* other node was trying to update
* lvb when node died. recreate the
@@ -1565,8 +1566,9 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
* most recent valid lvb info */
BUG_ON(ml->type != LKM_EXMODE &&
ml->type != LKM_PRMODE);
- if (res->lvb[0] && (ml->type == LKM_EXMODE ||
- memcmp(res->lvb, mres->lvb, DLM_LVB_LEN))) {
+ if (!dlm_lvb_is_empty(res->lvb) &&
+ (ml->type == LKM_EXMODE ||
+ memcmp(res->lvb, mres->lvb, DLM_LVB_LEN))) {
mlog(ML_ERROR, "received bad lvb!\n");
__dlm_print_one_lock_resource(res);
BUG();