static int au_procfs_plm_write_si(struct file *file, unsigned long id)
{
int err;
struct super_block *sb;
struct au_sbinfo *sbinfo;
err = -EBUSY;
if (unlikely(file->private_data))
goto out;
sb = NULL;
/* don't use au_sbilist_lock() here */
spin_lock(&au_sbilist.spin);
list_for_each_entry(sbinfo, &au_sbilist.head, si_list)
if (id == sysaufs_si_id(sbinfo)) {
kobject_get(&sbinfo->si_kobj);
sb = sbinfo->si_sb;
break;
}
spin_unlock(&au_sbilist.spin);
err = -EINVAL;
if (unlikely(!sb))
goto out;
err = au_plink_maint_enter(sb);
if (!err)
/* keep kobject_get() */
file->private_data = sbinfo;
else
kobject_put(&sbinfo->si_kobj);
out:
return err;
}
static void sysrq_sb(struct super_block *sb)
{
char *plevel;
struct au_sbinfo *sbinfo;
struct file *file;
plevel = au_plevel;
au_plevel = KERN_WARNING;
au_debug(1);
sbinfo = au_sbi(sb);
pr_warning("si=%lx\n", sysaufs_si_id(sbinfo));
pr_warning(AUFS_NAME ": superblock\n");
au_dpri_sb(sb);
pr_warning(AUFS_NAME ": root dentry\n");
au_dpri_dentry(sb->s_root);
pr_warning(AUFS_NAME ": root inode\n");
au_dpri_inode(sb->s_root->d_inode);
#if 0
struct inode *i;
pr_warning(AUFS_NAME ": isolated inode\n");
list_for_each_entry(i, &sb->s_inodes, i_sb_list)
if (list_empty(&i->i_dentry))
au_dpri_inode(i);
#endif
pr_warning(AUFS_NAME ": files\n");
list_for_each_entry(file, &sb->s_files, f_u.fu_list)
if (!special_file(file->f_dentry->d_inode->i_mode))
au_dpri_file(file);
au_plevel = plevel;
au_debug(0);
}
int sysaufs_si_init(struct au_sbinfo *sbinfo)
{
int err;
sbinfo->si_kobj.kset = sysaufs_kset;
/* cf. sysaufs_name() */
err = kobject_init_and_add
(&sbinfo->si_kobj, &au_sbi_ktype, /*&sysaufs_kset->kobj*/NULL,
SysaufsSiNamePrefix "%lx", sysaufs_si_id(sbinfo));
dbgaufs_si_null(sbinfo);
if (!err) {
err = dbgaufs_si_init(sbinfo);
if (unlikely(err))
kobject_put(&sbinfo->si_kobj);
}
return err;
}