Ocfs2: Add a new code 'OCFS2_INFO_FREEINODE' for o2info ioctl.

The new code is dedicated to calculate free inodes number of all inode_allocs,
then return the info to userpace in terms of an array.

Specially, flag 'OCFS2_INFO_FL_NON_COHERENT', manipulated by '--cluster-coherent'
from userspace, is now going to be involved. setting the flag on means no cluster
coherency considered, usually, userspace tools choose none-coherency strategy by
default for the sake of performace.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
index b46f39bf7438..6b4b39a83662 100644
--- a/fs/ocfs2/ocfs2_ioctl.h
+++ b/fs/ocfs2/ocfs2_ioctl.h
@@ -142,6 +142,16 @@ struct ocfs2_info_journal_size {
         __u64 ij_journal_size;
 };
 
+struct ocfs2_info_freeinode {
+        struct ocfs2_info_request ifi_req;
+        struct ocfs2_info_local_freeinode {
+                __u64 lfi_total;
+                __u64 lfi_free;
+        } ifi_stat[OCFS2_MAX_SLOTS];
+        __u32 ifi_slotnum; /* out */
+        __u32 ifi_pad;
+};
+
 /* Codes for ocfs2_info_request */
 enum ocfs2_info_type {
         OCFS2_INFO_CLUSTERSIZE = 1,
@@ -151,6 +161,7 @@ enum ocfs2_info_type {
         OCFS2_INFO_UUID,
         OCFS2_INFO_FS_FEATURES,
         OCFS2_INFO_JOURNAL_SIZE,
+        OCFS2_INFO_FREEINODE,
         OCFS2_INFO_NUM_TYPES
 };