ocfs2: Add the 'inode64' mount option.
Now that ocfs2 limits inode numbers to 32bits, add a mount option to
disable the limit. This parallels XFS. 64bit systems can handle the
larger inode numbers.
[ Added description of inode64 mount option in ocfs2.txt. --Mark ]
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 213bdca..d7a6f92 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -601,9 +601,10 @@
/*
* stat(2) can't handle i_ino > 32bits, so we tell the
* lower levels not to allocate us a block group past that
- * limit.
+ * limit. The 'inode64' mount option avoids this behavior.
*/
- (*ac)->ac_max_block = (u32)~0U;
+ if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64))
+ (*ac)->ac_max_block = (u32)~0U;
/*
* slot is set when we successfully steal inode from other nodes.