From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/fs/overlayfs/ovl_entry.h | 59 +++++++++++++++++++++++++++++++++++++++++++++--------------
1 files changed, 45 insertions(+), 14 deletions(-)
diff --git a/kernel/fs/overlayfs/ovl_entry.h b/kernel/fs/overlayfs/ovl_entry.h
index dc06228..c5d9a02 100644
--- a/kernel/fs/overlayfs/ovl_entry.h
+++ b/kernel/fs/overlayfs/ovl_entry.h
@@ -1,11 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
*
* Copyright (C) 2011 Novell Inc.
* Copyright (C) 2016 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
*/
struct ovl_config {
@@ -20,15 +17,21 @@
bool nfs_export;
int xino;
bool metacopy;
+ bool ovl_volatile;
bool override_creds;
};
struct ovl_sb {
struct super_block *sb;
dev_t pseudo_dev;
+ /* Unusable (conflicting) uuid */
+ bool bad_uuid;
+ /* Used as a lower layer (but maybe also as upper) */
+ bool is_lower;
};
struct ovl_layer {
+ /* ovl_free_fs() relies on @mnt being the first member! */
struct vfsmount *mnt;
/* Trap in ovl inode cache */
struct inode *trap;
@@ -39,19 +42,26 @@
int fsid;
};
+/*
+ * ovl_free_fs() relies on @mnt being the first member when unmounting
+ * the private mounts created for each layer. Let's check both the
+ * offset and type.
+ */
+static_assert(offsetof(struct ovl_layer, mnt) == 0);
+static_assert(__same_type(typeof_member(struct ovl_layer, mnt), struct vfsmount *));
+
struct ovl_path {
- struct ovl_layer *layer;
+ const struct ovl_layer *layer;
struct dentry *dentry;
};
/* private information held for overlayfs's superblock */
struct ovl_fs {
- struct vfsmount *upper_mnt;
- unsigned int numlower;
- /* Number of unique lower sb that differ from upper sb */
- unsigned int numlowerfs;
- struct ovl_layer *lower_layers;
- struct ovl_sb *lower_fs;
+ unsigned int numlayer;
+ /* Number of unique fs among layers including upper fs */
+ unsigned int numfs;
+ const struct ovl_layer *layers;
+ struct ovl_sb *fs;
/* workbasedir is the path at workdir= mount option */
struct dentry *workbasedir;
/* workdir is the 'work' directory under workbasedir */
@@ -68,15 +78,36 @@
/* Did we take the inuse lock? */
bool upperdir_locked;
bool workdir_locked;
+ bool share_whiteout;
/* Traps in ovl inode cache */
- struct inode *upperdir_trap;
struct inode *workbasedir_trap;
struct inode *workdir_trap;
struct inode *indexdir_trap;
- /* Inode numbers in all layers do not use the high xino_bits */
- unsigned int xino_bits;
+ /* -1: disabled, 0: same fs, 1..32: number of unused ino bits */
+ int xino_mode;
+ /* For allocation of non-persistent inode numbers */
+ atomic_long_t last_ino;
+ /* Whiteout dentry cache */
+ struct dentry *whiteout;
+ /* r/o snapshot of upperdir sb's only taken on volatile mounts */
+ errseq_t errseq;
};
+static inline struct vfsmount *ovl_upper_mnt(struct ovl_fs *ofs)
+{
+ return ofs->layers[0].mnt;
+}
+
+static inline struct ovl_fs *OVL_FS(struct super_block *sb)
+{
+ return (struct ovl_fs *)sb->s_fs_info;
+}
+
+static inline bool ovl_should_sync(struct ovl_fs *ofs)
+{
+ return !ofs->config.ovl_volatile;
+}
+
/* private information held for every overlayfs dentry */
struct ovl_entry {
union {
--
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