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nilfs2: use root object to get ifile

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This rewrites functions using ifile so that they get ifile from
nilfs_root object, and will remove sbi->s_ifile.  Some functions that
don't know the root object are extended to receive it from caller.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi
2010-08-14 13:07:15 +09:00
parent 8e656fd518
commit e912a5b668
7 changed files with 67 additions and 80 deletions
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42
fs/nilfs2/super.c
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@@ -358,9 +358,9 @@ static void nilfs_put_super(struct super_block *sb)
down_write(&nilfs->ns_super_sem);
if (nilfs->ns_current == sbi)
nilfs->ns_current = NULL;
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_super_sem);
nilfs_detach_checkpoint(sbi);
put_nilfs(sbi->s_nilfs);
sbi->s_super = NULL;
sb->s_fs_info = NULL;
@@ -405,13 +405,12 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
if (!root)
return err;
down_write(&nilfs->ns_super_sem);
list_add(&sbi->s_list, &nilfs->ns_supers);
up_write(&nilfs->ns_super_sem);
if (root->ifile)
goto reuse; /* already attached checkpoint */
sbi->s_ifile = nilfs_ifile_new(sbi, nilfs->ns_inode_size);
if (!sbi->s_ifile)
goto delist;
root->ifile = nilfs_ifile_new(sbi, nilfs->ns_inode_size);
if (!root->ifile)
goto failed;
down_read(&nilfs->ns_segctor_sem);
err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, cno, 0, &raw_cp,
@@ -427,7 +426,7 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
}
goto failed;
}
err = nilfs_read_inode_common(sbi->s_ifile, &raw_cp->cp_ifile_inode);
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));
@@ -435,35 +434,18 @@ int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno, int curr_mnt,
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
reuse:
*rootp = root;
return 0;
failed_bh:
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
failed:
nilfs_mdt_destroy(sbi->s_ifile);
sbi->s_ifile = NULL;
delist:
down_write(&nilfs->ns_super_sem);
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_super_sem);
nilfs_put_root(root);
return err;
}
void nilfs_detach_checkpoint(struct nilfs_sb_info *sbi)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
nilfs_mdt_destroy(sbi->s_ifile);
sbi->s_ifile = NULL;
down_write(&nilfs->ns_super_sem);
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_super_sem);
}
static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
@@ -862,7 +844,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
}
if (!(sb->s_flags & MS_RDONLY)) {
err = nilfs_attach_segment_constructor(sbi);
err = nilfs_attach_segment_constructor(sbi, fsroot);
if (err)
goto failed_checkpoint;
}
@@ -896,6 +878,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
}
down_write(&nilfs->ns_super_sem);
list_add(&sbi->s_list, &nilfs->ns_supers);
if (!nilfs_test_opt(sbi, SNAPSHOT))
nilfs->ns_current = sbi;
up_write(&nilfs->ns_super_sem);
@@ -906,7 +889,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
nilfs_detach_segment_constructor(sbi);
failed_checkpoint:
nilfs_detach_checkpoint(sbi);
nilfs_put_root(fsroot);
failed_sbi:
@@ -966,6 +948,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
up_write(&nilfs->ns_sem);
} else {
__u64 features;
struct nilfs_root *root;
/*
* Mounting a RDONLY partition read-write, so reread and
@@ -987,7 +970,8 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
sb->s_flags &= ~MS_RDONLY;
err = nilfs_attach_segment_constructor(sbi);
root = NILFS_I(sb->s_root->d_inode)->i_root;
err = nilfs_attach_segment_constructor(sbi, root);
if (err)
goto restore_opts;