ocfs2: Add dir_resv_level mount option

The default behavior for directory reservations stays the same, but we add a
mount option so people can tweak the size of directory reservations
according to their workloads.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 8563f97c58af..6c9a28a2d3ae 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -2977,7 +2977,8 @@ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
          * if we only get one now, that's enough to continue. The rest
          * will be claimed after the conversion to extents.
          */
-        data_ac->ac_resv = &oi->ip_la_data_resv;
+        if (ocfs2_dir_resv_allowed(osb))
+                data_ac->ac_resv = &oi->ip_la_data_resv;
         ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len);
         if (ret) {
                 mlog_errno(ret);
@@ -3348,7 +3349,8 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                         goto bail;
                 }
 
-                data_ac->ac_resv = &OCFS2_I(dir)->ip_la_data_resv;
+                if (ocfs2_dir_resv_allowed(osb))
+                        data_ac->ac_resv = &OCFS2_I(dir)->ip_la_data_resv;
 
                 credits = ocfs2_calc_extend_credits(sb, el, 1);
         } else {