nilfs2: use iget for all metadata files
This makes use of iget5_locked to allocate or get inode for metadata
files to stop using own inode allocator.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 3c6cc60..599d9c2 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -635,46 +635,55 @@
}
/**
- * nilfs_sufile_read - read sufile inode
- * @sufile: sufile inode
+ * nilfs_sufile_read - read or get sufile inode
+ * @sb: super block instance
+ * @susize: size of a segment usage entry
* @raw_inode: on-disk sufile inode
+ * @inodep: buffer to store the inode
*/
-int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode)
+int nilfs_sufile_read(struct super_block *sb, size_t susize,
+ struct nilfs_inode *raw_inode, struct inode **inodep)
{
- struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
+ struct inode *sufile;
+ struct nilfs_sufile_info *sui;
struct buffer_head *header_bh;
struct nilfs_sufile_header *header;
void *kaddr;
- int ret;
+ int err;
- ret = nilfs_read_inode_common(sufile, raw_inode);
- if (ret < 0)
- return ret;
+ sufile = nilfs_iget_locked(sb, NULL, NILFS_SUFILE_INO);
+ if (unlikely(!sufile))
+ return -ENOMEM;
+ if (!(sufile->i_state & I_NEW))
+ goto out;
- ret = nilfs_sufile_get_header_block(sufile, &header_bh);
- if (!ret) {
- kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
- header = kaddr + bh_offset(header_bh);
- sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
- kunmap_atomic(kaddr, KM_USER0);
- brelse(header_bh);
- }
- return ret;
-}
+ err = nilfs_mdt_init(sufile, NILFS_MDT_GFP, sizeof(*sui));
+ if (err)
+ goto failed;
-/**
- * nilfs_sufile_new - create sufile
- * @nilfs: nilfs object
- * @susize: size of a segment usage entry
- */
-struct inode *nilfs_sufile_new(struct the_nilfs *nilfs, size_t susize)
-{
- struct inode *sufile;
+ nilfs_mdt_set_entry_size(sufile, susize,
+ sizeof(struct nilfs_sufile_header));
- sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO,
- sizeof(struct nilfs_sufile_info));
- if (sufile)
- nilfs_mdt_set_entry_size(sufile, susize,
- sizeof(struct nilfs_sufile_header));
- return sufile;
+ err = nilfs_read_inode_common(sufile, raw_inode);
+ if (err)
+ goto failed;
+
+ err = nilfs_sufile_get_header_block(sufile, &header_bh);
+ if (err)
+ goto failed;
+
+ sui = NILFS_SUI(sufile);
+ kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
+ header = kaddr + bh_offset(header_bh);
+ sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
+ kunmap_atomic(kaddr, KM_USER0);
+ brelse(header_bh);
+
+ unlock_new_inode(sufile);
+ out:
+ *inodep = sufile;
+ return 0;
+ failed:
+ iget_failed(sufile);
+ return err;
}