xfs: create function to scan and clear EOFBLOCKS inodes

[deliverable/linux.git] / fs / xfs / xfs_icache.c

diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 2a96dc48ebe6cdebe1db562f792ca5cb2eafb694..d115cb44b103f6b1660d44abbf839d0f9cafd34f 100644 (file)
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1170,6 +1170,49 @@ xfs_reclaim_inodes_count(
        return reclaimable;
 }
 
+STATIC int
+xfs_inode_free_eofblocks(
+       struct xfs_inode        *ip,
+       struct xfs_perag        *pag,
+       int                     flags,
+       void                    *args)
+{
+       int ret;
+
+       if (!xfs_can_free_eofblocks(ip, false)) {
+               /* inode could be preallocated or append-only */
+               trace_xfs_inode_free_eofblocks_invalid(ip);
+               xfs_inode_clear_eofblocks_tag(ip);
+               return 0;
+       }
+
+       /*
+        * If the mapping is dirty the operation can block and wait for some
+        * time. Unless we are waiting, skip it.
+        */
+       if (!(flags & SYNC_WAIT) &&
+           mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
+               return 0;
+
+       ret = xfs_free_eofblocks(ip->i_mount, ip, true);
+
+       /* don't revisit the inode if we're not waiting */
+       if (ret == EAGAIN && !(flags & SYNC_WAIT))
+               ret = 0;
+
+       return ret;
+}
+
+int
+xfs_icache_free_eofblocks(
+       struct xfs_mount        *mp,
+       int                     flags)
+{
+       ASSERT((flags & ~(SYNC_TRYLOCK|SYNC_WAIT)) == 0);
+       return xfs_inode_ag_iterator_tag(mp, xfs_inode_free_eofblocks, flags,
+                                        NULL, XFS_ICI_EOFBLOCKS_TAG);
+}
+
 void
 xfs_inode_set_eofblocks_tag(
        xfs_inode_t     *ip)