ocfs2: allow for more than one data extent when creating xattr

Orabug: 18108070

ocfs2_xattr_extend_allocation() hits panic when creating xattr during
data extent alloc phase.  The problem occurs if due to local alloc
fragmentation, clusters are spread over multiple extents.  In this case
ocfs2_add_clusters_in_btree() finds no space to store more than one
extent record and therefore fails returning RESTART_META.  The situation
is anticipated for xattr update case but not xattr create case.  This
fix simply ports that code to create case.

Signed-off-by: Tariq Saeed <tariq.x.saeed@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 185fa3b7f962..4217fedb2c11 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -3200,8 +3200,15 @@ meta_guess:
                         clusters_add += 1;
                 }
         } else {
-                meta_add += 1;
                 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
+                if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
+                        struct ocfs2_extent_list *el = &def_xv.xv.xr_list;
+                        meta_add += ocfs2_extend_meta_needed(el);
+                        credits += ocfs2_calc_extend_credits(inode->i_sb,
+                                                             el);
+                } else {
+                        meta_add += 1;
+                }
         }
 out:
         if (clusters_need)