[PATCH RFC 1/4] erofs: move `struct erofs_anon_fs_type` to super.c
Christian Brauner
brauner at kernel.org
Thu Jul 3 22:23:10 AEST 2025
From: Hongzhen Luo <hongzhen at linux.alibaba.com>
Move the `struct erofs_anon_fs_type` to the super.c and
expose it in preparation for the upcoming page cache share
feature.
Signed-off-by: Hongzhen Luo <hongzhen at linux.alibaba.com>
Link: https://lore.kernel.org/20240902110620.2202586-2-hongzhen@linux.alibaba.com
Signed-off-by: Christian Brauner <brauner at kernel.org>
---
fs/erofs/fscache.c | 13 -------------
fs/erofs/internal.h | 2 ++
fs/erofs/super.c | 24 ++++++++++++++++++++++++
3 files changed, 26 insertions(+), 13 deletions(-)
diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c
index 34517ca9df91..fe9216dd27f8 100644
--- a/fs/erofs/fscache.c
+++ b/fs/erofs/fscache.c
@@ -3,7 +3,6 @@
* Copyright (C) 2022, Alibaba Cloud
* Copyright (C) 2022, Bytedance Inc. All rights reserved.
*/
-#include <linux/pseudo_fs.h>
#include <linux/fscache.h>
#include "internal.h"
@@ -13,18 +12,6 @@ static LIST_HEAD(erofs_domain_list);
static LIST_HEAD(erofs_domain_cookies_list);
static struct vfsmount *erofs_pseudo_mnt;
-static int erofs_anon_init_fs_context(struct fs_context *fc)
-{
- return init_pseudo(fc, EROFS_SUPER_MAGIC) ? 0 : -ENOMEM;
-}
-
-static struct file_system_type erofs_anon_fs_type = {
- .owner = THIS_MODULE,
- .name = "pseudo_erofs",
- .init_fs_context = erofs_anon_init_fs_context,
- .kill_sb = kill_anon_super,
-};
-
struct erofs_fscache_io {
struct netfs_cache_resources cres;
struct iov_iter iter;
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index a32c03a80c70..30380f7baf5e 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -372,6 +372,8 @@ extern const struct file_operations erofs_dir_fops;
extern const struct iomap_ops z_erofs_iomap_report_ops;
+extern struct file_system_type erofs_anon_fs_type;
+
/* flags for erofs_fscache_register_cookie() */
#define EROFS_REG_COOKIE_SHARE 0x0001
#define EROFS_REG_COOKIE_NEED_NOEXIST 0x0002
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index e1e9f06e8342..8fb14df2a343 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -11,6 +11,7 @@
#include <linux/fs_parser.h>
#include <linux/exportfs.h>
#include <linux/backing-dev.h>
+#include <linux/pseudo_fs.h>
#include "xattr.h"
#define CREATE_TRACE_POINTS
@@ -889,6 +890,29 @@ static struct file_system_type erofs_fs_type = {
};
MODULE_ALIAS_FS("erofs");
+static const struct super_operations erofs_anon_sops = {
+ .statfs = simple_statfs,
+};
+
+static int erofs_anon_init_fs_context(struct fs_context *fc)
+{
+ struct pseudo_fs_context *ctx;
+
+ ctx = init_pseudo(fc, EROFS_SUPER_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->ops = &erofs_anon_sops;
+ return 0;
+}
+
+struct file_system_type erofs_anon_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "pseudo_erofs",
+ .init_fs_context = erofs_anon_init_fs_context,
+ .kill_sb = kill_anon_super,
+};
+
static int __init erofs_module_init(void)
{
int err;
--
2.47.2
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