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| author | Kurt Hackel <kurt.hackel@oracle.com> | 2006-04-27 18:02:10 -0700 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-06-26 14:42:46 -0700 |
| commit | 8bc674cb4834fb25206b7f7f5e37fe571aa76b34 (patch) | |
| tree | 9c9ba3801669e66a30bac121846153879a19dfd6 /fs/ocfs2 | |
| parent | aba9aac78817d88aa2b223f1aedf1e9815ae97b8 (diff) | |
| download | linux-3.10-8bc674cb4834fb25206b7f7f5e37fe571aa76b34.tar.gz linux-3.10-8bc674cb4834fb25206b7f7f5e37fe571aa76b34.tar.bz2 linux-3.10-8bc674cb4834fb25206b7f7f5e37fe571aa76b34.zip | |
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.h | 9 | ||||
| -rw-r--r-- | fs/ocfs2/dlm/dlmrecovery.c | 12 |
2 files changed, 16 insertions, 5 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 4fc1be3a3fa..bf873919b00 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 b568bb6617d..8a3f0173ff5 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(); |