diff options
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 59 |
1 files changed, 28 insertions, 31 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 182ff2476cc..de887063dcf 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -107,6 +107,14 @@ static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb, * OCFS2 Lock Resource Operations * * These fine tune the behavior of the generic dlmglue locking infrastructure. + * + * The most basic of lock types can point ->l_priv to their respective + * struct ocfs2_super and allow the default actions to manage things. + * + * Right now, each lock type also needs to implement an init function, + * and trivial lock/unlock wrappers. ocfs2_simple_drop_lockres() + * should be called when the lock is no longer needed (i.e., object + * destruction time). */ struct ocfs2_lock_res_ops { /* @@ -115,6 +123,15 @@ struct ocfs2_lock_res_ops { */ struct ocfs2_super * (*get_osb)(struct ocfs2_lock_res *); + /* + * Optionally called in the downconvert (or "vote") thread + * after a successful downconvert. The lockres will not be + * referenced after this callback is called, so it is safe to + * free memory, etc. + * + * The exact semantics of when this is called are controlled + * by ->downconvert_worker() + */ void (*post_unlock)(struct ocfs2_super *, struct ocfs2_lock_res *); /* @@ -2230,16 +2247,8 @@ complete_unlock: mlog_exit_void(); } -typedef void (ocfs2_pre_drop_cb_t)(struct ocfs2_lock_res *, void *); - -struct drop_lock_cb { - ocfs2_pre_drop_cb_t *drop_func; - void *drop_data; -}; - static int ocfs2_drop_lock(struct ocfs2_super *osb, - struct ocfs2_lock_res *lockres, - struct drop_lock_cb *dcb) + struct ocfs2_lock_res *lockres) { enum dlm_status status; unsigned long flags; @@ -2274,8 +2283,12 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb, spin_lock_irqsave(&lockres->l_lock, flags); } - if (dcb) - dcb->drop_func(lockres, dcb->drop_data); + if (lockres->l_ops->flags & LOCK_TYPE_USES_LVB) { + if (lockres->l_flags & OCFS2_LOCK_ATTACHED && + lockres->l_level == LKM_EXMODE && + !(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) + lockres->l_ops->set_lvb(lockres); + } if (lockres->l_flags & OCFS2_LOCK_BUSY) mlog(ML_ERROR, "destroying busy lock: \"%s\"\n", @@ -2355,7 +2368,7 @@ void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, int ret; ocfs2_mark_lockres_freeing(lockres); - ret = ocfs2_drop_lock(osb, lockres, NULL); + ret = ocfs2_drop_lock(osb, lockres); if (ret) mlog_errno(ret); } @@ -2366,22 +2379,9 @@ static void ocfs2_drop_osb_locks(struct ocfs2_super *osb) ocfs2_simple_drop_lockres(osb, &osb->osb_rename_lockres); } -static void ocfs2_meta_pre_drop(struct ocfs2_lock_res *lockres, void *data) -{ - struct inode *inode = data; - - /* the metadata lock requires a bit more work as we have an - * LVB to worry about. */ - if (lockres->l_flags & OCFS2_LOCK_ATTACHED && - lockres->l_level == LKM_EXMODE && - !(lockres->l_flags & OCFS2_LOCK_NEEDS_REFRESH)) - __ocfs2_stuff_meta_lvb(inode); -} - int ocfs2_drop_inode_locks(struct inode *inode) { int status, err; - struct drop_lock_cb meta_dcb = { ocfs2_meta_pre_drop, inode, }; mlog_entry_void(); @@ -2389,24 +2389,21 @@ int ocfs2_drop_inode_locks(struct inode *inode) * ocfs2_clear_inode has done it for us. */ err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), - &OCFS2_I(inode)->ip_data_lockres, - NULL); + &OCFS2_I(inode)->ip_data_lockres); if (err < 0) mlog_errno(err); status = err; err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), - &OCFS2_I(inode)->ip_meta_lockres, - &meta_dcb); + &OCFS2_I(inode)->ip_meta_lockres); if (err < 0) mlog_errno(err); if (err < 0 && !status) status = err; err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), - &OCFS2_I(inode)->ip_rw_lockres, - NULL); + &OCFS2_I(inode)->ip_rw_lockres); if (err < 0) mlog_errno(err); if (err < 0 && !status) |