nilfs2: set pointer to root object in inodes

This puts a pointer to nilfs_root object in the private part of
on-memory inode, and makes nilfs_iget function pick up the inode with
the same root object.

Non-root inodes inherit its nilfs_root object from parent inode.  That
of the root inode is allocated through nilfs_attach_checkpoint()
function.

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

1 files changed, 8 insertions, 4 deletions

diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index d0c35ef39f6a..a9a5ba8f57d5 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -504,6 +504,7 @@ static int nilfs_recovery_copy_block(struct the_nilfs *nilfs,
 
 static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
                                       struct nilfs_sb_info *sbi,
+                                      struct nilfs_root *root,
                                       struct list_head *head,
                                       unsigned long *nr_salvaged_blocks)
 {
@@ -515,7 +516,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
         int err = 0, err2 = 0;
 
         list_for_each_entry_safe(rb, n, head, list) {
-                inode = nilfs_iget(sbi->s_super, rb->ino);
+                inode = nilfs_iget(sbi->s_super, root, rb->ino);
                 if (IS_ERR(inode)) {
                         err = PTR_ERR(inode);
                         inode = NULL;
@@ -578,6 +579,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
  */
 static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
                                  struct nilfs_sb_info *sbi,
+                                 struct nilfs_root *root,
                                  struct nilfs_recovery_info *ri)
 {
         struct buffer_head *bh_sum = NULL;
@@ -649,7 +651,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
                                 goto failed;
                         if (flags & NILFS_SS_LOGEND) {
                                 err = nilfs_recover_dsync_blocks(
-                                        nilfs, sbi, &dsync_blocks,
+                                        nilfs, sbi, root, &dsync_blocks,
                                         &nsalvaged_blocks);
                                 if (unlikely(err))
                                         goto failed;
@@ -746,19 +748,20 @@ int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
                               struct nilfs_sb_info *sbi,
                               struct nilfs_recovery_info *ri)
 {
+        struct nilfs_root *root;
         int err;
 
         if (ri->ri_lsegs_start == 0 || ri->ri_lsegs_end == 0)
                 return 0;
 
-        err = nilfs_attach_checkpoint(sbi, ri->ri_cno);
+        err = nilfs_attach_checkpoint(sbi, ri->ri_cno, true, &root);
         if (unlikely(err)) {
                 printk(KERN_ERR
                        "NILFS: error loading the latest checkpoint.\n");
                 return err;
         }
 
-        err = nilfs_do_roll_forward(nilfs, sbi, ri);
+        err = nilfs_do_roll_forward(nilfs, sbi, root, ri);
         if (unlikely(err))
                 goto failed;
 
@@ -789,6 +792,7 @@ int nilfs_salvage_orphan_logs(struct the_nilfs *nilfs,
 
  failed:
         nilfs_detach_checkpoint(sbi);
+        nilfs_put_root(root);
         return err;
 }