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nilfs2: split out nilfs_get_root_dentry

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This splits the code to allocate root dentry into a separate routine
for convenience in successive changes.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi 2010-08-26 01:52:51 +09:00
parent dc3d3b810a
commit 367ea33486
1 changed files with 35 additions and 19 deletions
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54
fs/nilfs2/super.c
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@ -750,6 +750,39 @@ int nilfs_check_feature_compatibility(struct super_block *sb,
return 0; return 0;
} }
static int nilfs_get_root_dentry(struct super_block *sb,
struct nilfs_root *root,
struct dentry **root_dentry)
{
struct inode *inode;
struct dentry *dentry;
int ret = 0;
inode = nilfs_iget(sb, root, NILFS_ROOT_INO);
if (IS_ERR(inode)) {
printk(KERN_ERR "NILFS: get root inode failed\n");
ret = PTR_ERR(inode);
goto out;
}
if (!S_ISDIR(inode->i_mode) || !inode->i_blocks || !inode->i_size) {
iput(inode);
printk(KERN_ERR "NILFS: corrupt root inode.\n");
ret = -EINVAL;
goto out;
}
dentry = d_alloc_root(inode);
if (!dentry) {
iput(inode);
printk(KERN_ERR "NILFS: get root dentry failed\n");
ret = -ENOMEM;
goto out;
}
*root_dentry = dentry;
out:
return ret;
}
/** /**
* nilfs_fill_super() - initialize a super block instance * nilfs_fill_super() - initialize a super block instance
* @sb: super_block * @sb: super_block
@ -766,7 +799,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
{ {
struct nilfs_sb_info *sbi; struct nilfs_sb_info *sbi;
struct nilfs_root *fsroot; struct nilfs_root *fsroot;
struct inode *root;
__u64 cno; __u64 cno;
int err, curr_mnt; int err, curr_mnt;
@ -850,25 +882,9 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
goto failed_checkpoint; goto failed_checkpoint;
} }
root = nilfs_iget(sb, fsroot, NILFS_ROOT_INO); err = nilfs_get_root_dentry(sb, fsroot, &sb->s_root);
if (IS_ERR(root)) { if (err)
printk(KERN_ERR "NILFS: get root inode failed\n");
err = PTR_ERR(root);
goto failed_segctor; goto failed_segctor;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
iput(root);
printk(KERN_ERR "NILFS: corrupt root inode.\n");
err = -EINVAL;
goto failed_segctor;
}
sb->s_root = d_alloc_root(root);
if (!sb->s_root) {
iput(root);
printk(KERN_ERR "NILFS: get root dentry failed\n");
err = -ENOMEM;
goto failed_segctor;
}
nilfs_put_root(fsroot); nilfs_put_root(fsroot);