mirror of https://github.com/OpenIPC/firmware.git
657 lines
19 KiB
Diff
657 lines
19 KiB
Diff
diff -drupN a/fs/sdcardfs/sdcardfs.h b/fs/sdcardfs/sdcardfs.h
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--- a/fs/sdcardfs/sdcardfs.h 1970-01-01 03:00:00.000000000 +0300
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+++ b/fs/sdcardfs/sdcardfs.h 2022-06-12 05:28:14.000000000 +0300
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@@ -0,0 +1,652 @@
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+/*
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+ * fs/sdcardfs/sdcardfs.h
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+ *
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+ * The sdcardfs v2.0
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+ * This file system replaces the sdcard daemon on Android
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+ * On version 2.0, some of the daemon functions have been ported
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+ * to support the multi-user concepts of Android 4.4
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+ *
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+ * Copyright (c) 2013 Samsung Electronics Co. Ltd
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+ * Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun,
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+ * Sunghwan Yun, Sungjong Seo
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+ *
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+ * This program has been developed as a stackable file system based on
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+ * the WrapFS which written by
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+ *
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+ * Copyright (c) 1998-2011 Erez Zadok
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+ * Copyright (c) 2009 Shrikar Archak
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+ * Copyright (c) 2003-2011 Stony Brook University
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+ * Copyright (c) 2003-2011 The Research Foundation of SUNY
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+ *
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+ * This file is dual licensed. It may be redistributed and/or modified
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+ * under the terms of the Apache 2.0 License OR version 2 of the GNU
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+ * General Public License.
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+ */
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+
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+#ifndef _SDCARDFS_H_
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+#define _SDCARDFS_H_
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+
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+#include <linux/dcache.h>
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+#include <linux/file.h>
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+#include <linux/fs.h>
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+#include <linux/aio.h>
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+#include <linux/kref.h>
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+#include <linux/mm.h>
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+#include <linux/mount.h>
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+#include <linux/namei.h>
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+#include <linux/seq_file.h>
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+#include <linux/statfs.h>
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+#include <linux/fs_stack.h>
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+#include <linux/magic.h>
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+#include <linux/uaccess.h>
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+#include <linux/slab.h>
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+#include <linux/sched.h>
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+#include <linux/types.h>
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+#include <linux/security.h>
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+#include <linux/string.h>
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+#include <linux/list.h>
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+#include "multiuser.h"
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+
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+/* the file system name */
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+#define SDCARDFS_NAME "sdcardfs"
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+
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+/* sdcardfs root inode number */
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+#define SDCARDFS_ROOT_INO 1
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+
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+/* useful for tracking code reachability */
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+#define UDBG pr_default("DBG:%s:%s:%d\n", __FILE__, __func__, __LINE__)
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+
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+#define SDCARDFS_DIRENT_SIZE 256
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+
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+/* temporary static uid settings for development */
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+#define AID_ROOT 0 /* uid for accessing /mnt/sdcard & extSdcard */
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+#define AID_MEDIA_RW 1023 /* internal media storage write access */
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+
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+#define AID_SDCARD_RW 1015 /* external storage write access */
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+#define AID_SDCARD_R 1028 /* external storage read access */
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+#define AID_SDCARD_PICS 1033 /* external storage photos access */
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+#define AID_SDCARD_AV 1034 /* external storage audio/video access */
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+#define AID_SDCARD_ALL 1035 /* access all users external storage */
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+#define AID_MEDIA_OBB 1059 /* obb files */
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+
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+#define AID_SDCARD_IMAGE 1057
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+
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+#define AID_PACKAGE_INFO 1027
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+
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+
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+/*
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+ * Permissions are handled by our permission function.
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+ * We don't want anyone who happens to look at our inode value to prematurely
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+ * block access, so store more permissive values. These are probably never
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+ * used.
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+ */
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+#define fixup_tmp_permissions(x) \
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+ do { \
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+ (x)->i_uid = make_kuid(&init_user_ns, \
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+ SDCARDFS_I(x)->data->d_uid); \
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+ (x)->i_gid = make_kgid(&init_user_ns, AID_SDCARD_RW); \
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+ (x)->i_mode = ((x)->i_mode & S_IFMT) | 0775;\
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+ } while (0)
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+
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+/* Android 5.0 support */
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+
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+/* Permission mode for a specific node. Controls how file permissions
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+ * are derived for children nodes.
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+ */
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+typedef enum {
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+ /* Nothing special; this node should just inherit from its parent. */
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+ PERM_INHERIT,
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+ /* This node is one level above a normal root; used for legacy layouts
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+ * which use the first level to represent user_id.
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+ */
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+ PERM_PRE_ROOT,
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+ /* This node is "/" */
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+ PERM_ROOT,
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+ /* This node is "/Android" */
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+ PERM_ANDROID,
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+ /* This node is "/Android/data" */
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+ PERM_ANDROID_DATA,
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+ /* This node is "/Android/obb" */
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+ PERM_ANDROID_OBB,
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+ /* This node is "/Android/media" */
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+ PERM_ANDROID_MEDIA,
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+ /* This node is "/Android/[data|media|obb]/[package]" */
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+ PERM_ANDROID_PACKAGE,
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+ /* This node is "/Android/[data|media|obb]/[package]/cache" */
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+ PERM_ANDROID_PACKAGE_CACHE,
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+} perm_t;
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+
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+struct sdcardfs_sb_info;
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+struct sdcardfs_mount_options;
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+struct sdcardfs_inode_info;
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+struct sdcardfs_inode_data;
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+
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+/* Do not directly use this function. Use OVERRIDE_CRED() instead. */
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+const struct cred *override_fsids(struct sdcardfs_sb_info *sbi,
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+ struct sdcardfs_inode_data *data);
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+/* Do not directly use this function, use REVERT_CRED() instead. */
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+void revert_fsids(const struct cred *old_cred);
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+
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+/* operations vectors defined in specific files */
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+extern const struct file_operations sdcardfs_main_fops;
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+extern const struct file_operations sdcardfs_dir_fops;
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+extern const struct inode_operations sdcardfs_main_iops;
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+extern const struct inode_operations sdcardfs_dir_iops;
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+extern const struct inode_operations sdcardfs_symlink_iops;
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+extern const struct super_operations sdcardfs_sops;
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+extern const struct dentry_operations sdcardfs_ci_dops;
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+extern const struct address_space_operations sdcardfs_aops, sdcardfs_dummy_aops;
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+extern const struct vm_operations_struct sdcardfs_vm_ops;
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+
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+extern int sdcardfs_init_inode_cache(void);
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+extern void sdcardfs_destroy_inode_cache(void);
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+extern int sdcardfs_init_dentry_cache(void);
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+extern void sdcardfs_destroy_dentry_cache(void);
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+extern int new_dentry_private_data(struct dentry *dentry);
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+extern void free_dentry_private_data(struct dentry *dentry);
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+extern struct dentry *sdcardfs_lookup(struct inode *dir, struct dentry *dentry,
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+ unsigned int flags);
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+extern struct inode *sdcardfs_iget(struct super_block *sb,
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+ struct inode *lower_inode, userid_t id);
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+extern int sdcardfs_interpose(struct dentry *dentry, struct super_block *sb,
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+ struct path *lower_path, userid_t id);
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+
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+/* file private data */
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+struct sdcardfs_file_info {
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+ struct file *lower_file;
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+ const struct vm_operations_struct *lower_vm_ops;
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+};
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+
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+struct sdcardfs_inode_data {
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+ struct kref refcount;
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+ bool abandoned;
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+
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+ perm_t perm;
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+ userid_t userid;
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+ uid_t d_uid;
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+ bool under_android;
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+ bool under_cache;
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+ bool under_obb;
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+};
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+
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+/* sdcardfs inode data in memory */
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+struct sdcardfs_inode_info {
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+ struct inode *lower_inode;
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+ /* state derived based on current position in hierarchy */
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+ struct sdcardfs_inode_data *data;
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+
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+ /* top folder for ownership */
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+ spinlock_t top_lock;
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+ struct sdcardfs_inode_data *top_data;
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+
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+ struct inode vfs_inode;
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+};
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+
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+
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+/* sdcardfs dentry data in memory */
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+struct sdcardfs_dentry_info {
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+ spinlock_t lock; /* protects lower_path */
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+ struct path lower_path;
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+ struct path orig_path;
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+};
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+
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+struct sdcardfs_mount_options {
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+ uid_t fs_low_uid;
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+ gid_t fs_low_gid;
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+ userid_t fs_user_id;
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+ bool multiuser;
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+ bool gid_derivation;
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+ bool default_normal;
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+ unsigned int reserved_mb;
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+};
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+
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+struct sdcardfs_vfsmount_options {
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+ gid_t gid;
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+ mode_t mask;
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+};
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+
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+extern int parse_options_remount(struct super_block *sb, char *options, int silent,
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+ struct sdcardfs_vfsmount_options *vfsopts);
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+
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+/* sdcardfs super-block data in memory */
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+struct sdcardfs_sb_info {
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+ struct super_block *sb;
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+ struct super_block *lower_sb;
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+ /* derived perm policy : some of options have been added
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+ * to sdcardfs_mount_options (Android 4.4 support)
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+ */
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+ struct sdcardfs_mount_options options;
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+ spinlock_t lock; /* protects obbpath */
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+ char *obbpath_s;
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+ struct path obbpath;
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+ void *pkgl_id;
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+ struct list_head list;
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+};
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+
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+/*
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+ * inode to private data
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+ *
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+ * Since we use containers and the struct inode is _inside_ the
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+ * sdcardfs_inode_info structure, SDCARDFS_I will always (given a non-NULL
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+ * inode pointer), return a valid non-NULL pointer.
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+ */
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+static inline struct sdcardfs_inode_info *SDCARDFS_I(const struct inode *inode)
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+{
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+ return container_of(inode, struct sdcardfs_inode_info, vfs_inode);
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+}
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+
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+/* dentry to private data */
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+#define SDCARDFS_D(dent) ((struct sdcardfs_dentry_info *)(dent)->d_fsdata)
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+
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+/* superblock to private data */
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+#define SDCARDFS_SB(super) ((struct sdcardfs_sb_info *)(super)->s_fs_info)
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+
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+/* file to private Data */
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+#define SDCARDFS_F(file) ((struct sdcardfs_file_info *)((file)->private_data))
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+
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+/* file to lower file */
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+static inline struct file *sdcardfs_lower_file(const struct file *f)
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+{
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+ return SDCARDFS_F(f)->lower_file;
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+}
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+
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+static inline void sdcardfs_set_lower_file(struct file *f, struct file *val)
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+{
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+ SDCARDFS_F(f)->lower_file = val;
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+}
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+
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+/* inode to lower inode. */
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+static inline struct inode *sdcardfs_lower_inode(const struct inode *i)
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+{
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+ return SDCARDFS_I(i)->lower_inode;
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+}
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+
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+static inline void sdcardfs_set_lower_inode(struct inode *i, struct inode *val)
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+{
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+ SDCARDFS_I(i)->lower_inode = val;
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+}
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+
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+/* superblock to lower superblock */
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+static inline struct super_block *sdcardfs_lower_super(
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+ const struct super_block *sb)
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+{
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+ return SDCARDFS_SB(sb)->lower_sb;
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+}
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+
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+static inline void sdcardfs_set_lower_super(struct super_block *sb,
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+ struct super_block *val)
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+{
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+ SDCARDFS_SB(sb)->lower_sb = val;
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+}
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+
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+/* path based (dentry/mnt) macros */
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+static inline void pathcpy(struct path *dst, const struct path *src)
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+{
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+ dst->dentry = src->dentry;
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+ dst->mnt = src->mnt;
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+}
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+
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+/* sdcardfs_get_pname functions calls path_get()
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+ * therefore, the caller must call "proper" path_put functions
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+ */
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+#define SDCARDFS_DENT_FUNC(pname) \
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+static inline void sdcardfs_get_##pname(const struct dentry *dent, \
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+ struct path *pname) \
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+{ \
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+ spin_lock(&SDCARDFS_D(dent)->lock); \
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+ pathcpy(pname, &SDCARDFS_D(dent)->pname); \
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+ path_get(pname); \
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+ spin_unlock(&SDCARDFS_D(dent)->lock); \
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+ return; \
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+} \
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+static inline void sdcardfs_put_##pname(const struct dentry *dent, \
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+ struct path *pname) \
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+{ \
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+ path_put(pname); \
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+ return; \
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+} \
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+static inline void sdcardfs_set_##pname(const struct dentry *dent, \
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+ struct path *pname) \
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+{ \
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+ spin_lock(&SDCARDFS_D(dent)->lock); \
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+ pathcpy(&SDCARDFS_D(dent)->pname, pname); \
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+ spin_unlock(&SDCARDFS_D(dent)->lock); \
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+ return; \
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+} \
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+static inline void sdcardfs_reset_##pname(const struct dentry *dent) \
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+{ \
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+ spin_lock(&SDCARDFS_D(dent)->lock); \
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+ SDCARDFS_D(dent)->pname.dentry = NULL; \
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+ SDCARDFS_D(dent)->pname.mnt = NULL; \
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+ spin_unlock(&SDCARDFS_D(dent)->lock); \
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+ return; \
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+} \
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+static inline void sdcardfs_put_reset_##pname(const struct dentry *dent) \
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+{ \
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+ struct path pname; \
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+ spin_lock(&SDCARDFS_D(dent)->lock); \
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+ if (SDCARDFS_D(dent)->pname.dentry) { \
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+ pathcpy(&pname, &SDCARDFS_D(dent)->pname); \
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+ SDCARDFS_D(dent)->pname.dentry = NULL; \
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+ SDCARDFS_D(dent)->pname.mnt = NULL; \
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+ spin_unlock(&SDCARDFS_D(dent)->lock); \
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+ path_put(&pname); \
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+ } else \
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+ spin_unlock(&SDCARDFS_D(dent)->lock); \
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+ return; \
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+}
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+
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+SDCARDFS_DENT_FUNC(lower_path)
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+SDCARDFS_DENT_FUNC(orig_path)
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+
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+static inline bool sbinfo_has_sdcard_magic(struct sdcardfs_sb_info *sbinfo)
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+{
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+ return sbinfo && sbinfo->sb
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+ && sbinfo->sb->s_magic == SDCARDFS_SUPER_MAGIC;
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+}
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+
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+static inline struct sdcardfs_inode_data *data_get(
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+ struct sdcardfs_inode_data *data)
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+{
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+ if (data)
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+ kref_get(&data->refcount);
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+ return data;
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+}
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+
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+static inline struct sdcardfs_inode_data *top_data_get(
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+ struct sdcardfs_inode_info *info)
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+{
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+ struct sdcardfs_inode_data *top_data;
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+
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+ spin_lock(&info->top_lock);
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+ top_data = data_get(info->top_data);
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+ spin_unlock(&info->top_lock);
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+ return top_data;
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+}
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+
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+extern void data_release(struct kref *ref);
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+
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+static inline void data_put(struct sdcardfs_inode_data *data)
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+{
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+ kref_put(&data->refcount, data_release);
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+}
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+
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+static inline void release_own_data(struct sdcardfs_inode_info *info)
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+{
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+ /*
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+ * This happens exactly once per inode. At this point, the inode that
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+ * originally held this data is about to be freed, and all references
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+ * to it are held as a top value, and will likely be released soon.
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+ */
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+ info->data->abandoned = true;
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+ data_put(info->data);
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+}
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+
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+static inline void set_top(struct sdcardfs_inode_info *info,
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+ struct sdcardfs_inode_info *top_owner)
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+{
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+ struct sdcardfs_inode_data *old_top;
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+ struct sdcardfs_inode_data *new_top = NULL;
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+
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+ if (top_owner)
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+ new_top = top_data_get(top_owner);
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+
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+ spin_lock(&info->top_lock);
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+ old_top = info->top_data;
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+ info->top_data = new_top;
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+ if (old_top)
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+ data_put(old_top);
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+ spin_unlock(&info->top_lock);
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+}
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+
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+static inline int get_gid(struct vfsmount *mnt,
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+ struct super_block *sb,
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+ struct sdcardfs_inode_data *data)
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+{
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+ struct sdcardfs_vfsmount_options *vfsopts = mnt->data;
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+ struct sdcardfs_sb_info *sbi = SDCARDFS_SB(sb);
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+
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+ if (vfsopts->gid == AID_SDCARD_RW && !sbi->options.default_normal)
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+ /* As an optimization, certain trusted system components only run
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+ * as owner but operate across all users. Since we're now handing
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+ * out the sdcard_rw GID only to trusted apps, we're okay relaxing
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+ * the user boundary enforcement for the default view. The UIDs
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+ * assigned to app directories are still multiuser aware.
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+ */
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+ return AID_SDCARD_RW;
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+ else
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+ return multiuser_get_uid(data->userid, vfsopts->gid);
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+}
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+
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+static inline int get_mode(struct vfsmount *mnt,
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+ struct sdcardfs_inode_info *info,
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+ struct sdcardfs_inode_data *data)
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+{
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+ int owner_mode;
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+ int filtered_mode;
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+ struct sdcardfs_vfsmount_options *opts = mnt->data;
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+ int visible_mode = 0775 & ~opts->mask;
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+
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+
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+ if (data->perm == PERM_PRE_ROOT) {
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+ /* Top of multi-user view should always be visible to ensure
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+ * secondary users can traverse inside.
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+ */
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+ visible_mode = 0711;
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+ } else if (data->under_android) {
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+ /* Block "other" access to Android directories, since only apps
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+ * belonging to a specific user should be in there; we still
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+ * leave +x open for the default view.
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+ */
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+ if (opts->gid == AID_SDCARD_RW)
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+ visible_mode = visible_mode & ~0006;
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+ else
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+ visible_mode = visible_mode & ~0007;
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+ }
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+ owner_mode = info->lower_inode->i_mode & 0700;
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+ filtered_mode = visible_mode & (owner_mode | (owner_mode >> 3) | (owner_mode >> 6));
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+ return filtered_mode;
|
|
+}
|
|
+
|
|
+static inline int has_graft_path(const struct dentry *dent)
|
|
+{
|
|
+ int ret = 0;
|
|
+
|
|
+ spin_lock(&SDCARDFS_D(dent)->lock);
|
|
+ if (SDCARDFS_D(dent)->orig_path.dentry != NULL)
|
|
+ ret = 1;
|
|
+ spin_unlock(&SDCARDFS_D(dent)->lock);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static inline void sdcardfs_get_real_lower(const struct dentry *dent,
|
|
+ struct path *real_lower)
|
|
+{
|
|
+ /* in case of a local obb dentry
|
|
+ * the orig_path should be returned
|
|
+ */
|
|
+ if (has_graft_path(dent))
|
|
+ sdcardfs_get_orig_path(dent, real_lower);
|
|
+ else
|
|
+ sdcardfs_get_lower_path(dent, real_lower);
|
|
+}
|
|
+
|
|
+static inline void sdcardfs_put_real_lower(const struct dentry *dent,
|
|
+ struct path *real_lower)
|
|
+{
|
|
+ if (has_graft_path(dent))
|
|
+ sdcardfs_put_orig_path(dent, real_lower);
|
|
+ else
|
|
+ sdcardfs_put_lower_path(dent, real_lower);
|
|
+}
|
|
+
|
|
+extern struct mutex sdcardfs_super_list_lock;
|
|
+extern struct list_head sdcardfs_super_list;
|
|
+
|
|
+/* for packagelist.c */
|
|
+extern appid_t get_appid(const char *app_name);
|
|
+extern appid_t get_ext_gid(const char *app_name);
|
|
+extern appid_t is_excluded(const char *app_name, userid_t userid);
|
|
+extern int check_caller_access_to_name(struct inode *parent_node, const struct qstr *name);
|
|
+extern int packagelist_init(void);
|
|
+extern void packagelist_exit(void);
|
|
+
|
|
+/* for derived_perm.c */
|
|
+#define BY_NAME (1 << 0)
|
|
+#define BY_USERID (1 << 1)
|
|
+struct limit_search {
|
|
+ unsigned int flags;
|
|
+ struct qstr name;
|
|
+ userid_t userid;
|
|
+};
|
|
+
|
|
+extern void setup_derived_state(struct inode *inode, perm_t perm,
|
|
+ userid_t userid, uid_t uid);
|
|
+extern void get_derived_permission(struct dentry *parent, struct dentry *dentry);
|
|
+extern void get_derived_permission_new(struct dentry *parent, struct dentry *dentry, const struct qstr *name);
|
|
+extern void fixup_perms_recursive(struct dentry *dentry, struct limit_search *limit);
|
|
+
|
|
+extern void update_derived_permission_lock(struct dentry *dentry);
|
|
+void fixup_lower_ownership(struct dentry *dentry, const char *name);
|
|
+extern int need_graft_path(struct dentry *dentry);
|
|
+extern int is_base_obbpath(struct dentry *dentry);
|
|
+extern int is_obbpath_invalid(struct dentry *dentry);
|
|
+extern int setup_obb_dentry(struct dentry *dentry, struct path *lower_path);
|
|
+
|
|
+/* locking helpers */
|
|
+static inline struct dentry *lock_parent(struct dentry *dentry)
|
|
+{
|
|
+ struct dentry *dir = dget_parent(dentry);
|
|
+
|
|
+ inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
|
|
+ return dir;
|
|
+}
|
|
+
|
|
+static inline void unlock_dir(struct dentry *dir)
|
|
+{
|
|
+ inode_unlock(d_inode(dir));
|
|
+ dput(dir);
|
|
+}
|
|
+
|
|
+static inline int prepare_dir(const char *path_s, uid_t uid, gid_t gid, mode_t mode)
|
|
+{
|
|
+ int err;
|
|
+ struct dentry *dent;
|
|
+ struct iattr attrs;
|
|
+ struct path parent;
|
|
+
|
|
+ dent = kern_path_locked(path_s, &parent);
|
|
+ if (IS_ERR(dent)) {
|
|
+ err = PTR_ERR(dent);
|
|
+ if (err == -EEXIST)
|
|
+ err = 0;
|
|
+ goto out_unlock;
|
|
+ }
|
|
+
|
|
+ err = vfs_mkdir2(parent.mnt, d_inode(parent.dentry), dent, mode);
|
|
+ if (err) {
|
|
+ if (err == -EEXIST)
|
|
+ err = 0;
|
|
+ goto out_dput;
|
|
+ }
|
|
+
|
|
+ attrs.ia_uid = make_kuid(&init_user_ns, uid);
|
|
+ attrs.ia_gid = make_kgid(&init_user_ns, gid);
|
|
+ attrs.ia_valid = ATTR_UID | ATTR_GID;
|
|
+ inode_lock(d_inode(dent));
|
|
+ notify_change2(parent.mnt, dent, &attrs, NULL);
|
|
+ inode_unlock(d_inode(dent));
|
|
+
|
|
+out_dput:
|
|
+ dput(dent);
|
|
+
|
|
+out_unlock:
|
|
+ /* parent dentry locked by lookup_create */
|
|
+ inode_unlock(d_inode(parent.dentry));
|
|
+ path_put(&parent);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Return 1, if a disk has enough free space, otherwise 0.
|
|
+ * We assume that any files can not be overwritten.
|
|
+ */
|
|
+static inline int check_min_free_space(struct dentry *dentry, size_t size, int dir)
|
|
+{
|
|
+ int err;
|
|
+ struct path lower_path;
|
|
+ struct kstatfs statfs;
|
|
+ u64 avail;
|
|
+ struct sdcardfs_sb_info *sbi = SDCARDFS_SB(dentry->d_sb);
|
|
+
|
|
+ if (sbi->options.reserved_mb) {
|
|
+ /* Get fs stat of lower filesystem. */
|
|
+ sdcardfs_get_lower_path(dentry, &lower_path);
|
|
+ err = vfs_statfs(&lower_path, &statfs);
|
|
+ sdcardfs_put_lower_path(dentry, &lower_path);
|
|
+
|
|
+ if (unlikely(err))
|
|
+ return 0;
|
|
+
|
|
+ /* Invalid statfs informations. */
|
|
+ if (unlikely(statfs.f_bsize == 0))
|
|
+ return 0;
|
|
+
|
|
+ /* if you are checking directory, set size to f_bsize. */
|
|
+ if (unlikely(dir))
|
|
+ size = statfs.f_bsize;
|
|
+
|
|
+ /* available size */
|
|
+ avail = statfs.f_bavail * statfs.f_bsize;
|
|
+
|
|
+ /* not enough space */
|
|
+ if ((u64)size > avail)
|
|
+ return 0;
|
|
+
|
|
+ /* enough space */
|
|
+ if ((avail - size) > (sbi->options.reserved_mb * 1024 * 1024))
|
|
+ return 1;
|
|
+
|
|
+ return 0;
|
|
+ } else
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+/*
|
|
+ * Copies attrs and maintains sdcardfs managed attrs
|
|
+ * Since our permission check handles all special permissions, set those to be open
|
|
+ */
|
|
+static inline void sdcardfs_copy_and_fix_attrs(struct inode *dest, const struct inode *src)
|
|
+{
|
|
+ dest->i_mode = (src->i_mode & S_IFMT) | S_IRWXU | S_IRWXG |
|
|
+ S_IROTH | S_IXOTH; /* 0775 */
|
|
+ dest->i_uid = make_kuid(&init_user_ns, SDCARDFS_I(dest)->data->d_uid);
|
|
+ dest->i_gid = make_kgid(&init_user_ns, AID_SDCARD_RW);
|
|
+ dest->i_rdev = src->i_rdev;
|
|
+ dest->i_atime = src->i_atime;
|
|
+ dest->i_mtime = src->i_mtime;
|
|
+ dest->i_ctime = src->i_ctime;
|
|
+ dest->i_blkbits = src->i_blkbits;
|
|
+ dest->i_flags = src->i_flags;
|
|
+ set_nlink(dest, src->i_nlink);
|
|
+}
|
|
+
|
|
+static inline bool str_case_eq(const char *s1, const char *s2)
|
|
+{
|
|
+ return !strcasecmp(s1, s2);
|
|
+}
|
|
+
|
|
+static inline bool str_n_case_eq(const char *s1, const char *s2, size_t len)
|
|
+{
|
|
+ return !strncasecmp(s1, s2, len);
|
|
+}
|
|
+
|
|
+static inline bool qstr_case_eq(const struct qstr *q1, const struct qstr *q2)
|
|
+{
|
|
+ return q1->len == q2->len && str_n_case_eq(q1->name, q2->name, q2->len);
|
|
+}
|
|
+
|
|
+#define QSTR_LITERAL(string) QSTR_INIT(string, sizeof(string)-1)
|
|
+
|
|
+#endif /* not _SDCARDFS_H_ */
|