diff options
| author | Jia Zhu <zhujia.zj@bytedance.com> | 2022-09-18 07:34:56 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-09-20 03:01:54 +0300 |
| commit | 2ef164414123fcf574aff7a0be5f71f7e60a3fec (patch) | |
| tree | aefc6bba528e9dfa4f8e9f47103b4fd8ff78b83e /fs/erofs/sysfs.c | |
| parent | 7d41963759feb3cfa4c1164b8b9db5d1f055932d (diff) | |
| download | linux-2ef164414123fcf574aff7a0be5f71f7e60a3fec.tar.xz | |
erofs: introduce 'domain_id' mount option
Introduce 'domain_id' mount option to enable shared domain sementics.
In which case, the related cookie is shared if two mountpoints in the
same domain have the same data blob. Users could specify the name of
domain by this mount option.
Signed-off-by: Jia Zhu <zhujia.zj@bytedance.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220918043456.147-7-zhujia.zj@bytedance.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/sysfs.c')
| -rw-r--r-- | fs/erofs/sysfs.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/fs/erofs/sysfs.c b/fs/erofs/sysfs.c index c1383e508bbe..341fb43ad587 100644 --- a/fs/erofs/sysfs.c +++ b/fs/erofs/sysfs.c @@ -201,12 +201,27 @@ static struct kobject erofs_feat = { int erofs_register_sysfs(struct super_block *sb) { struct erofs_sb_info *sbi = EROFS_SB(sb); + char *name; + char *str = NULL; int err; + if (erofs_is_fscache_mode(sb)) { + if (sbi->opt.domain_id) { + str = kasprintf(GFP_KERNEL, "%s,%s", sbi->opt.domain_id, + sbi->opt.fsid); + if (!str) + return -ENOMEM; + name = str; + } else { + name = sbi->opt.fsid; + } + } else { + name = sb->s_id; + } sbi->s_kobj.kset = &erofs_root; init_completion(&sbi->s_kobj_unregister); - err = kobject_init_and_add(&sbi->s_kobj, &erofs_sb_ktype, NULL, "%s", - erofs_is_fscache_mode(sb) ? sbi->opt.fsid : sb->s_id); + err = kobject_init_and_add(&sbi->s_kobj, &erofs_sb_ktype, NULL, "%s", name); + kfree(str); if (err) goto put_sb_kobj; return 0; |