nilfs2: move inode count and block count into root object

This moves sbi->s_inodes_count and sbi->s_blocks_count into nilfs_root
object.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

4 files changed, 10 insertions, 11 deletions

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 7e883d5a5033..ca09e4362d66 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -306,7 +306,7 @@ struct inode *nilfs_new_inode(struct inode *dir, int mode)
                 goto failed_ifile_create_inode;
         /* reference count of i_bh inherits from nilfs_mdt_read_block() */
 
-        atomic_inc(&sbi->s_inodes_count);
+        atomic_inc(&root->inodes_count);
         inode_init_owner(inode, dir, mode);
         inode->i_ino = ino;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
@@ -715,7 +715,7 @@ void nilfs_evict_inode(struct inode *inode)
         end_writeback(inode);
 
         nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
-        atomic_dec(&NILFS_SB(sb)->s_inodes_count);
+        atomic_dec(&ii->i_root->inodes_count);
 
         nilfs_clear_inode(inode);
 
diff --git a/fs/nilfs2/sb.h b/fs/nilfs2/sb.h
index 50c418e6438e..3cc3675c3abe 100644
--- a/fs/nilfs2/sb.h
+++ b/fs/nilfs2/sb.h
@@ -44,8 +44,6 @@ struct nilfs_sc_info;
 struct nilfs_sb_info {
         /* Snapshot status */
         __u64 s_snapshot_cno;           /* Checkpoint number */
-        atomic_t s_inodes_count;
-        atomic_t s_blocks_count;        /* Reserved (might be deleted) */
 
         /* Mount options */
         unsigned long s_mount_opt;
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 2a6b74e6699d..b75306d642c2 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -856,9 +856,9 @@ static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci)
         raw_cp->cp_snapshot_list.ssl_next = 0;
         raw_cp->cp_snapshot_list.ssl_prev = 0;
         raw_cp->cp_inodes_count =
-                cpu_to_le64(atomic_read(&sbi->s_inodes_count));
+                cpu_to_le64(atomic_read(&sci->sc_root->inodes_count));
         raw_cp->cp_blocks_count =
-                cpu_to_le64(atomic_read(&sbi->s_blocks_count));
+                cpu_to_le64(atomic_read(&sci->sc_root->blocks_count));
         raw_cp->cp_nblk_inc =
                 cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc);
         raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime);
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 87c57810ae88..acfa74e45f0b 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -429,8 +429,9 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
         err = nilfs_read_inode_common(root->ifile, &raw_cp->cp_ifile_inode);
         if (unlikely(err))
                 goto failed_bh;
-        atomic_set(&sbi->s_inodes_count, le64_to_cpu(raw_cp->cp_inodes_count));
-        atomic_set(&sbi->s_blocks_count, le64_to_cpu(raw_cp->cp_blocks_count));
+
+        atomic_set(&root->inodes_count, le64_to_cpu(raw_cp->cp_inodes_count));
+        atomic_set(&root->blocks_count, le64_to_cpu(raw_cp->cp_blocks_count));
 
         nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
 
@@ -449,8 +450,8 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
 static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
         struct super_block *sb = dentry->d_sb;
-        struct nilfs_sb_info *sbi = NILFS_SB(sb);
-        struct the_nilfs *nilfs = sbi->s_nilfs;
+        struct nilfs_root *root = NILFS_I(dentry->d_inode)->i_root;
+        struct the_nilfs *nilfs = root->nilfs;
         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
         unsigned long long blocks;
         unsigned long overhead;
@@ -486,7 +487,7 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
         buf->f_bfree = nfreeblocks;
         buf->f_bavail = (buf->f_bfree >= nrsvblocks) ?
                 (buf->f_bfree - nrsvblocks) : 0;
-        buf->f_files = atomic_read(&sbi->s_inodes_count);
+        buf->f_files = atomic_read(&root->inodes_count);
         buf->f_ffree = 0; /* nilfs_count_free_inodes(sb); */
         buf->f_namelen = NILFS_NAME_LEN;
         buf->f_fsid.val[0] = (u32)id;