2 files changed, 33 insertions, 1 deletions

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index d34703dbcb42..ffdabc687852 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -375,6 +375,9 @@ struct xfs_fs_eofblocks {
 #define XFS_EOF_FLAGS_GID               (1 << 2) /* filter by gid */
 #define XFS_EOF_FLAGS_PRID              (1 << 3) /* filter by project id */
 #define XFS_EOF_FLAGS_MINFILESIZE       (1 << 4) /* filter by min file size */
+#define XFS_EOF_FLAGS_UNION             (1 << 5) /* union filter algorithm;
+                                                  * kernel only, not included in
+                                                  * valid mask */
 #define XFS_EOF_FLAGS_VALID     \
         (XFS_EOF_FLAGS_SYNC |   \
          XFS_EOF_FLAGS_UID |    \
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 6e522ff5a006..43452081b705 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1203,6 +1203,30 @@ xfs_inode_match_id(
         return 1;
 }
 
+/*
+ * A union-based inode filtering algorithm. Process the inode if any of the
+ * criteria match. This is for global/internal scans only.
+ */
+STATIC int
+xfs_inode_match_id_union(
+        struct xfs_inode        *ip,
+        struct xfs_eofblocks    *eofb)
+{
+        if ((eofb->eof_flags & XFS_EOF_FLAGS_UID) &&
+            uid_eq(VFS_I(ip)->i_uid, eofb->eof_uid))
+                return 1;
+
+        if ((eofb->eof_flags & XFS_EOF_FLAGS_GID) &&
+            gid_eq(VFS_I(ip)->i_gid, eofb->eof_gid))
+                return 1;
+
+        if ((eofb->eof_flags & XFS_EOF_FLAGS_PRID) &&
+            xfs_get_projid(ip) == eofb->eof_prid)
+                return 1;
+
+        return 0;
+}
+
 STATIC int
 xfs_inode_free_eofblocks(
         struct xfs_inode        *ip,
@@ -1212,6 +1236,7 @@ xfs_inode_free_eofblocks(
         int ret;
         struct xfs_eofblocks *eofb = args;
         bool need_iolock = true;
+        int match;
 
         ASSERT(!eofb || (eofb && eofb->eof_scan_owner != 0));
 
@@ -1231,7 +1256,11 @@ xfs_inode_free_eofblocks(
                 return 0;
 
         if (eofb) {
-                if (!xfs_inode_match_id(ip, eofb))
+                if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
+                        match = xfs_inode_match_id_union(ip, eofb);
+                else
+                        match = xfs_inode_match_id(ip, eofb);
+                if (!match)
                         return 0;
 
                 /* skip the inode if the file size is too small */