@@ -257,6 +257,10 @@ static inline void inc_nlink(struct inode *inode)
{
inode->i_nlink++;
}
+static inline void drop_nlink(struct inode *inode)
+{
+ inode->i_nlink--;
+}
static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
{
@@ -608,3 +608,38 @@ xfs_iunlink_remove(
return xfs_iunlink_remove_inode(tp, pag, agibp, ip);
}
+
+/*
+ * Decrement the link count on an inode & log the change. If this causes the
+ * link count to go to zero, move the inode to AGI unlinked list so that it can
+ * be freed when the last active reference goes away via xfs_inactive().
+ */
+int
+xfs_droplink(
+ struct xfs_trans *tp,
+ struct xfs_inode *ip)
+{
+ xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
+
+ drop_nlink(VFS_I(ip));
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+ if (VFS_I(ip)->i_nlink)
+ return 0;
+
+ return xfs_iunlink(tp, ip);
+}
+
+/*
+ * Increment the link count on an inode & log the change.
+ */
+void
+xfs_bumplink(
+ struct xfs_trans *tp,
+ struct xfs_inode *ip)
+{
+ xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
+
+ inc_nlink(VFS_I(ip));
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+}
@@ -59,6 +59,8 @@ void xfs_inode_init(struct xfs_trans *tp, const struct xfs_icreate_args *args,
int xfs_iunlink(struct xfs_trans *tp, struct xfs_inode *ip);
int xfs_iunlink_remove(struct xfs_trans *tp, struct xfs_perag *pag,
struct xfs_inode *ip);
+int xfs_droplink(struct xfs_trans *tp, struct xfs_inode *ip);
+void xfs_bumplink(struct xfs_trans *tp, struct xfs_inode *ip);
/* The libxfs client must provide this group of helper functions. */