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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2022, Alibaba Cloud
*/
#include <linux/fscache.h>
#include "internal.h"
int erofs_fscache_register_fs(struct super_block *sb)
{
struct erofs_sb_info *sbi = EROFS_SB(sb);
struct fscache_volume *volume;
char *name;
int ret = 0;
name = kasprintf(GFP_KERNEL, "erofs,%s", sbi->opt.fsid);
if (!name)
return -ENOMEM;
volume = fscache_acquire_volume(name, NULL, NULL, 0);
if (IS_ERR_OR_NULL(volume)) {
erofs_err(sb, "failed to register volume for %s", name);
ret = volume ? PTR_ERR(volume) : -EOPNOTSUPP;
volume = NULL;
}
sbi->volume = volume;
kfree(name);
return ret;
}
void erofs_fscache_unregister_fs(struct super_block *sb)
{
struct erofs_sb_info *sbi = EROFS_SB(sb);
fscache_relinquish_volume(sbi->volume, NULL, false);
sbi->volume = NULL;
}
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