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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-03-29 16:49:13 -0800 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-04-07 17:39:43 -0700 |
| commit | 2cd9888590c52ac7592e3607d0a3174ccd57ef86 (patch) | |
| tree | 3f8ddf8bb0bb4cf1532707d613412cb98ffd9823 /fs/ocfs2 | |
| parent | f43e6918c0e3906fd4483316f6a1a07bba615908 (diff) | |
| download | lwn-2cd9888590c52ac7592e3607d0a3174ccd57ef86.tar.gz lwn-2cd9888590c52ac7592e3607d0a3174ccd57ef86.zip | |
ocfs2: test and set teardown flag early in user_dlm_destroy_lock()
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dlm/userdlm.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/fs/ocfs2/dlm/userdlm.c b/fs/ocfs2/dlm/userdlm.c index 808ec0527c75..74ca4e5f9765 100644 --- a/fs/ocfs2/dlm/userdlm.c +++ b/fs/ocfs2/dlm/userdlm.c @@ -237,9 +237,13 @@ static void user_unlock_ast(void *opaque, enum dlm_status status) mlog(ML_ERROR, "Dlm returns status %d\n", status); spin_lock(&lockres->l_lock); - if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) + /* The teardown flag gets set early during the unlock process, + * so test the cancel flag to make sure that this ast isn't + * for a concurrent cancel. */ + if (lockres->l_flags & USER_LOCK_IN_TEARDOWN + && !(lockres->l_flags & USER_LOCK_IN_CANCEL)) { lockres->l_level = LKM_IVMODE; - else if (status == DLM_CANCELGRANT) { + } 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 @@ -608,6 +612,14 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres) mlog(0, "asked to destroy %s\n", lockres->l_name); spin_lock(&lockres->l_lock); + if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) { + mlog(0, "Lock is already torn down\n"); + spin_unlock(&lockres->l_lock); + return 0; + } + + lockres->l_flags |= USER_LOCK_IN_TEARDOWN; + while (lockres->l_flags & USER_LOCK_BUSY) { spin_unlock(&lockres->l_lock); @@ -633,7 +645,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres) lockres->l_flags &= ~USER_LOCK_ATTACHED; lockres->l_flags |= USER_LOCK_BUSY; - lockres->l_flags |= USER_LOCK_IN_TEARDOWN; spin_unlock(&lockres->l_lock); mlog(0, "unlocking lockres %s\n", lockres->l_name); |