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| author | Jia Zhu <zhujia.zj@bytedance.com> | 2022-09-18 07:34:54 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-09-20 03:01:54 +0300 |
| commit | a9849560c55e9e4ab9c53d073363dd6e19ec06ef (patch) | |
| tree | 9bcce3b3d532a51f4304c02dd5bf170e35743688 /fs/erofs/fscache.c | |
| parent | 8b7adf1dff3d5baf687acda936f193f80b7e0179 (diff) | |
| download | linux-a9849560c55e9e4ab9c53d073363dd6e19ec06ef.tar.xz | |
erofs: introduce a pseudo mnt to manage shared cookies
Use a pseudo mnt to manage shared cookies.
Signed-off-by: Jia Zhu <zhujia.zj@bytedance.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220918043456.147-5-zhujia.zj@bytedance.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/fscache.c')
| -rw-r--r-- | fs/erofs/fscache.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 8a1be6077ca4..0480aaf44cb9 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -8,6 +8,7 @@ static DEFINE_MUTEX(erofs_domain_list_lock); static LIST_HEAD(erofs_domain_list); +static struct vfsmount *erofs_pseudo_mnt; static struct netfs_io_request *erofs_fscache_alloc_request(struct address_space *mapping, loff_t start, size_t len) @@ -432,6 +433,10 @@ static void erofs_fscache_domain_put(struct erofs_domain *domain) mutex_lock(&erofs_domain_list_lock); if (refcount_dec_and_test(&domain->ref)) { list_del(&domain->list); + if (list_empty(&erofs_domain_list)) { + kern_unmount(erofs_pseudo_mnt); + erofs_pseudo_mnt = NULL; + } mutex_unlock(&erofs_domain_list_lock); fscache_relinquish_volume(domain->volume, NULL, false); kfree(domain->domain_id); @@ -486,6 +491,14 @@ static int erofs_fscache_init_domain(struct super_block *sb) if (err) goto out; + if (!erofs_pseudo_mnt) { + erofs_pseudo_mnt = kern_mount(&erofs_fs_type); + if (IS_ERR(erofs_pseudo_mnt)) { + err = PTR_ERR(erofs_pseudo_mnt); + goto out; + } + } + domain->volume = sbi->volume; refcount_set(&domain->ref, 1); list_add(&domain->list, &erofs_domain_list); |