[XFS] mark inodes for reclaim via a tag in the inode radix tree

Prepare for removing the deleted inode list by marking inodes for reclaim
in the inode radix trees so that we can use the radix trees to find
reclaimable inodes.

SGI-PV: 988142

SGI-Modid: xfs-linux-melb:xfs-kern:32331a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

2 files changed, 45 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 34413ceaea9f..9e7f4dccab72 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -644,6 +644,47 @@ xfs_reclaim_inode(
         return 0;
 }
 
+void
+xfs_inode_set_reclaim_tag(
+        xfs_inode_t     *ip)
+{
+        xfs_mount_t     *mp = ip->i_mount;
+        xfs_perag_t     *pag = xfs_get_perag(mp, ip->i_ino);
+
+        read_lock(&pag->pag_ici_lock);
+        spin_lock(&ip->i_flags_lock);
+        radix_tree_tag_set(&pag->pag_ici_root,
+                        XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
+        spin_unlock(&ip->i_flags_lock);
+        read_unlock(&pag->pag_ici_lock);
+        xfs_put_perag(mp, pag);
+}
+
+void
+__xfs_inode_clear_reclaim_tag(
+        xfs_mount_t     *mp,
+        xfs_perag_t     *pag,
+        xfs_inode_t     *ip)
+{
+        radix_tree_tag_clear(&pag->pag_ici_root,
+                        XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG);
+}
+
+void
+xfs_inode_clear_reclaim_tag(
+        xfs_inode_t     *ip)
+{
+        xfs_mount_t     *mp = ip->i_mount;
+        xfs_perag_t     *pag = xfs_get_perag(mp, ip->i_ino);
+
+        read_lock(&pag->pag_ici_lock);
+        spin_lock(&ip->i_flags_lock);
+        __xfs_inode_clear_reclaim_tag(mp, pag, ip);
+        spin_unlock(&ip->i_flags_lock);
+        read_unlock(&pag->pag_ici_lock);
+        xfs_put_perag(mp, pag);
+}
+
 int
 xfs_reclaim_inodes(
         xfs_mount_t     *mp,
diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index c1bcd500509a..5f6de1efe1f6 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -48,4 +48,8 @@ void xfs_flush_device(struct xfs_inode *ip);
 int xfs_reclaim_inode(struct xfs_inode *ip, int locked, int sync_mode);
 int xfs_reclaim_inodes(struct xfs_mount *mp, int noblock, int mode);
 
+void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
+void xfs_inode_clear_reclaim_tag(struct xfs_inode *ip);
+void __xfs_inode_clear_reclaim_tag(struct xfs_mount *mp, struct xfs_perag *pag,
+                                struct xfs_inode *ip);
 #endif